Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * scan.c - support for transforming the ACPI namespace into individual objects | |
3 | */ | |
4 | ||
5 | #include <linux/module.h> | |
6 | #include <linux/init.h> | |
5a0e3ad6 | 7 | #include <linux/slab.h> |
9b6d97b6 | 8 | #include <linux/kernel.h> |
1da177e4 | 9 | #include <linux/acpi.h> |
74523c90 AK |
10 | #include <linux/signal.h> |
11 | #include <linux/kthread.h> | |
222e82ac | 12 | #include <linux/dmi.h> |
d1efe3c3 | 13 | #include <linux/nls.h> |
1da177e4 LT |
14 | |
15 | #include <acpi/acpi_drivers.h> | |
1da177e4 | 16 | |
e60cc7a6 BH |
17 | #include "internal.h" |
18 | ||
1da177e4 | 19 | #define _COMPONENT ACPI_BUS_COMPONENT |
f52fd66d | 20 | ACPI_MODULE_NAME("scan"); |
1da177e4 | 21 | #define STRUCT_TO_INT(s) (*((int*)&s)) |
4be44fcd | 22 | extern struct acpi_device *acpi_root; |
1da177e4 LT |
23 | |
24 | #define ACPI_BUS_CLASS "system_bus" | |
29b71a1c | 25 | #define ACPI_BUS_HID "LNXSYBUS" |
1da177e4 LT |
26 | #define ACPI_BUS_DEVICE_NAME "System Bus" |
27 | ||
859ac9a4 BH |
28 | #define ACPI_IS_ROOT_DEVICE(device) (!(device)->parent) |
29 | ||
620e112c | 30 | static const char *dummy_hid = "device"; |
2b2ae7c7 | 31 | |
1da177e4 | 32 | static LIST_HEAD(acpi_device_list); |
e49bd2dd | 33 | static LIST_HEAD(acpi_bus_id_list); |
c511cc19 | 34 | static DEFINE_MUTEX(acpi_scan_lock); |
ca589f94 | 35 | static LIST_HEAD(acpi_scan_handlers_list); |
9090589d | 36 | DEFINE_MUTEX(acpi_device_lock); |
1da177e4 LT |
37 | LIST_HEAD(acpi_wakeup_device_list); |
38 | ||
e49bd2dd | 39 | struct acpi_device_bus_id{ |
bb095854 | 40 | char bus_id[15]; |
e49bd2dd ZR |
41 | unsigned int instance_no; |
42 | struct list_head node; | |
1da177e4 | 43 | }; |
29b71a1c | 44 | |
3757b948 RW |
45 | void acpi_scan_lock_acquire(void) |
46 | { | |
47 | mutex_lock(&acpi_scan_lock); | |
48 | } | |
49 | EXPORT_SYMBOL_GPL(acpi_scan_lock_acquire); | |
50 | ||
51 | void acpi_scan_lock_release(void) | |
52 | { | |
53 | mutex_unlock(&acpi_scan_lock); | |
54 | } | |
55 | EXPORT_SYMBOL_GPL(acpi_scan_lock_release); | |
56 | ||
ca589f94 RW |
57 | int acpi_scan_add_handler(struct acpi_scan_handler *handler) |
58 | { | |
59 | if (!handler || !handler->attach) | |
60 | return -EINVAL; | |
61 | ||
62 | list_add_tail(&handler->list_node, &acpi_scan_handlers_list); | |
63 | return 0; | |
64 | } | |
65 | ||
3f8055c3 RW |
66 | int acpi_scan_add_handler_with_hotplug(struct acpi_scan_handler *handler, |
67 | const char *hotplug_profile_name) | |
68 | { | |
69 | int error; | |
70 | ||
71 | error = acpi_scan_add_handler(handler); | |
72 | if (error) | |
73 | return error; | |
74 | ||
75 | acpi_sysfs_add_hotplug_profile(&handler->hotplug, hotplug_profile_name); | |
76 | return 0; | |
77 | } | |
78 | ||
29b71a1c TR |
79 | /* |
80 | * Creates hid/cid(s) string needed for modalias and uevent | |
81 | * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: | |
82 | * char *modalias: "acpi:IBM0001:ACPI0001" | |
83 | */ | |
b3e572d2 AB |
84 | static int create_modalias(struct acpi_device *acpi_dev, char *modalias, |
85 | int size) | |
86 | { | |
29b71a1c | 87 | int len; |
5c9fcb5d | 88 | int count; |
7f47fa6c | 89 | struct acpi_hardware_id *id; |
29b71a1c | 90 | |
2b2ae7c7 TR |
91 | if (list_empty(&acpi_dev->pnp.ids)) |
92 | return 0; | |
93 | ||
5c9fcb5d | 94 | len = snprintf(modalias, size, "acpi:"); |
29b71a1c TR |
95 | size -= len; |
96 | ||
7f47fa6c BH |
97 | list_for_each_entry(id, &acpi_dev->pnp.ids, list) { |
98 | count = snprintf(&modalias[len], size, "%s:", id->id); | |
5c9fcb5d ZR |
99 | if (count < 0 || count >= size) |
100 | return -EINVAL; | |
101 | len += count; | |
102 | size -= count; | |
103 | } | |
104 | ||
29b71a1c TR |
105 | modalias[len] = '\0'; |
106 | return len; | |
107 | } | |
108 | ||
109 | static ssize_t | |
110 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
111 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
112 | int len; | |
113 | ||
114 | /* Device has no HID and no CID or string is >1024 */ | |
115 | len = create_modalias(acpi_dev, buf, 1024); | |
116 | if (len <= 0) | |
117 | return 0; | |
118 | buf[len++] = '\n'; | |
119 | return len; | |
120 | } | |
121 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); | |
122 | ||
a33ec399 | 123 | static int acpi_scan_hot_remove(struct acpi_device *device) |
1da177e4 | 124 | { |
5993c467 | 125 | acpi_handle handle = device->handle; |
a33ec399 | 126 | acpi_handle not_used; |
1da177e4 LT |
127 | struct acpi_object_list arg_list; |
128 | union acpi_object arg; | |
a33ec399 | 129 | acpi_status status; |
882fd12e | 130 | unsigned long long sta; |
f058cdf4 | 131 | |
3757b948 | 132 | /* If there is no handle, the device node has been unregistered. */ |
a33ec399 | 133 | if (!handle) { |
3757b948 RW |
134 | dev_dbg(&device->dev, "ACPI handle missing\n"); |
135 | put_device(&device->dev); | |
a33ec399 | 136 | return -EINVAL; |
3757b948 RW |
137 | } |
138 | ||
26d46867 | 139 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
0794469d | 140 | "Hot-removing device %s...\n", dev_name(&device->dev))); |
26d46867 | 141 | |
bfee26db | 142 | acpi_bus_trim(device); |
3757b948 RW |
143 | /* Device node has been unregistered. */ |
144 | put_device(&device->dev); | |
b3c450c3 TK |
145 | device = NULL; |
146 | ||
a33ec399 | 147 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_LCK", ¬_used))) { |
1da177e4 LT |
148 | arg_list.count = 1; |
149 | arg_list.pointer = &arg; | |
150 | arg.type = ACPI_TYPE_INTEGER; | |
151 | arg.integer.value = 0; | |
152 | acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); | |
153 | } | |
1da177e4 | 154 | |
1da177e4 LT |
155 | arg_list.count = 1; |
156 | arg_list.pointer = &arg; | |
157 | arg.type = ACPI_TYPE_INTEGER; | |
158 | arg.integer.value = 1; | |
1da177e4 | 159 | |
1da177e4 LT |
160 | /* |
161 | * TBD: _EJD support. | |
162 | */ | |
1da177e4 | 163 | status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); |
c4753e57 | 164 | if (ACPI_FAILURE(status)) { |
a33ec399 RW |
165 | if (status == AE_NOT_FOUND) { |
166 | return -ENODEV; | |
167 | } else { | |
882fd12e TK |
168 | acpi_handle_warn(handle, "Eject failed (0x%x)\n", |
169 | status); | |
a33ec399 RW |
170 | return -EIO; |
171 | } | |
172 | } | |
1da177e4 | 173 | |
882fd12e TK |
174 | /* |
175 | * Verify if eject was indeed successful. If not, log an error | |
176 | * message. No need to call _OST since _EJ0 call was made OK. | |
177 | */ | |
178 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
179 | if (ACPI_FAILURE(status)) { | |
180 | acpi_handle_warn(handle, | |
181 | "Status check after eject failed (0x%x)\n", status); | |
182 | } else if (sta & ACPI_STA_DEVICE_ENABLED) { | |
183 | acpi_handle_warn(handle, | |
184 | "Eject incomplete - status 0x%llx\n", sta); | |
185 | } | |
186 | ||
a33ec399 RW |
187 | return 0; |
188 | } | |
1da177e4 | 189 | |
a33ec399 RW |
190 | static void acpi_bus_device_eject(void *context) |
191 | { | |
192 | acpi_handle handle = context; | |
193 | struct acpi_device *device = NULL; | |
194 | struct acpi_scan_handler *handler; | |
195 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; | |
196 | ||
197 | mutex_lock(&acpi_scan_lock); | |
198 | ||
199 | acpi_bus_get_device(handle, &device); | |
200 | if (!device) | |
201 | goto err_out; | |
202 | ||
203 | handler = device->handler; | |
204 | if (!handler || !handler->hotplug.enabled) { | |
205 | ost_code = ACPI_OST_SC_EJECT_NOT_SUPPORTED; | |
206 | goto err_out; | |
207 | } | |
208 | acpi_evaluate_hotplug_ost(handle, ACPI_NOTIFY_EJECT_REQUEST, | |
209 | ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); | |
210 | if (handler->hotplug.mode == AHM_CONTAINER) { | |
211 | device->flags.eject_pending = true; | |
212 | kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); | |
213 | } else { | |
214 | int error; | |
215 | ||
216 | get_device(&device->dev); | |
217 | error = acpi_scan_hot_remove(device); | |
218 | if (error) | |
219 | goto err_out; | |
f058cdf4 | 220 | } |
1da177e4 | 221 | |
3757b948 | 222 | out: |
f058cdf4 | 223 | mutex_unlock(&acpi_scan_lock); |
c8d72a5e | 224 | return; |
a33ec399 RW |
225 | |
226 | err_out: | |
227 | acpi_evaluate_hotplug_ost(handle, ACPI_NOTIFY_EJECT_REQUEST, ost_code, | |
228 | NULL); | |
229 | goto out; | |
230 | } | |
231 | ||
232 | static void acpi_scan_bus_device_check(acpi_handle handle, u32 ost_source) | |
233 | { | |
234 | struct acpi_device *device = NULL; | |
235 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; | |
236 | int error; | |
237 | ||
238 | mutex_lock(&acpi_scan_lock); | |
239 | ||
240 | acpi_bus_get_device(handle, &device); | |
241 | if (device) { | |
242 | dev_warn(&device->dev, "Attempt to re-insert\n"); | |
243 | goto out; | |
244 | } | |
245 | acpi_evaluate_hotplug_ost(handle, ost_source, | |
246 | ACPI_OST_SC_INSERT_IN_PROGRESS, NULL); | |
247 | error = acpi_bus_scan(handle); | |
248 | if (error) { | |
249 | acpi_handle_warn(handle, "Namespace scan failure\n"); | |
250 | goto out; | |
251 | } | |
252 | error = acpi_bus_get_device(handle, &device); | |
253 | if (error) { | |
254 | acpi_handle_warn(handle, "Missing device node object\n"); | |
255 | goto out; | |
256 | } | |
257 | ost_code = ACPI_OST_SC_SUCCESS; | |
258 | if (device->handler && device->handler->hotplug.mode == AHM_CONTAINER) | |
259 | kobject_uevent(&device->dev.kobj, KOBJ_ONLINE); | |
260 | ||
261 | out: | |
262 | acpi_evaluate_hotplug_ost(handle, ost_source, ost_code, NULL); | |
263 | mutex_unlock(&acpi_scan_lock); | |
264 | } | |
265 | ||
266 | static void acpi_scan_bus_check(void *context) | |
267 | { | |
268 | acpi_scan_bus_device_check((acpi_handle)context, | |
269 | ACPI_NOTIFY_BUS_CHECK); | |
270 | } | |
271 | ||
272 | static void acpi_scan_device_check(void *context) | |
273 | { | |
274 | acpi_scan_bus_device_check((acpi_handle)context, | |
275 | ACPI_NOTIFY_DEVICE_CHECK); | |
276 | } | |
277 | ||
2cbb14fb TK |
278 | static void acpi_hotplug_unsupported(acpi_handle handle, u32 type) |
279 | { | |
280 | u32 ost_status; | |
281 | ||
282 | switch (type) { | |
283 | case ACPI_NOTIFY_BUS_CHECK: | |
284 | acpi_handle_debug(handle, | |
285 | "ACPI_NOTIFY_BUS_CHECK event: unsupported\n"); | |
286 | ost_status = ACPI_OST_SC_INSERT_NOT_SUPPORTED; | |
287 | break; | |
288 | case ACPI_NOTIFY_DEVICE_CHECK: | |
289 | acpi_handle_debug(handle, | |
290 | "ACPI_NOTIFY_DEVICE_CHECK event: unsupported\n"); | |
291 | ost_status = ACPI_OST_SC_INSERT_NOT_SUPPORTED; | |
292 | break; | |
293 | case ACPI_NOTIFY_EJECT_REQUEST: | |
294 | acpi_handle_debug(handle, | |
295 | "ACPI_NOTIFY_EJECT_REQUEST event: unsupported\n"); | |
296 | ost_status = ACPI_OST_SC_EJECT_NOT_SUPPORTED; | |
297 | break; | |
298 | default: | |
299 | /* non-hotplug event; possibly handled by other handler */ | |
300 | return; | |
301 | } | |
302 | ||
303 | acpi_evaluate_hotplug_ost(handle, type, ost_status, NULL); | |
304 | } | |
305 | ||
306 | static void acpi_hotplug_notify_cb(acpi_handle handle, u32 type, void *data) | |
a33ec399 RW |
307 | { |
308 | acpi_osd_exec_callback callback; | |
2cbb14fb | 309 | struct acpi_scan_handler *handler = data; |
a33ec399 RW |
310 | acpi_status status; |
311 | ||
2cbb14fb TK |
312 | if (!handler->hotplug.enabled) |
313 | return acpi_hotplug_unsupported(handle, type); | |
314 | ||
a33ec399 RW |
315 | switch (type) { |
316 | case ACPI_NOTIFY_BUS_CHECK: | |
317 | acpi_handle_debug(handle, "ACPI_NOTIFY_BUS_CHECK event\n"); | |
318 | callback = acpi_scan_bus_check; | |
319 | break; | |
320 | case ACPI_NOTIFY_DEVICE_CHECK: | |
321 | acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK event\n"); | |
322 | callback = acpi_scan_device_check; | |
323 | break; | |
324 | case ACPI_NOTIFY_EJECT_REQUEST: | |
325 | acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event\n"); | |
326 | callback = acpi_bus_device_eject; | |
327 | break; | |
328 | default: | |
329 | /* non-hotplug event; possibly handled by other handler */ | |
330 | return; | |
331 | } | |
332 | status = acpi_os_hotplug_execute(callback, handle); | |
333 | if (ACPI_FAILURE(status)) | |
334 | acpi_evaluate_hotplug_ost(handle, type, | |
335 | ACPI_OST_SC_NON_SPECIFIC_FAILURE, | |
336 | NULL); | |
337 | } | |
338 | ||
339 | /** | |
340 | * acpi_bus_hot_remove_device: hot-remove a device and its children | |
341 | * @context: struct acpi_eject_event pointer (freed in this func) | |
342 | * | |
343 | * Hot-remove a device and its children. This function frees up the | |
344 | * memory space passed by arg context, so that the caller may call | |
345 | * this function asynchronously through acpi_os_hotplug_execute(). | |
346 | */ | |
347 | void acpi_bus_hot_remove_device(void *context) | |
348 | { | |
349 | struct acpi_eject_event *ej_event = context; | |
350 | struct acpi_device *device = ej_event->device; | |
351 | acpi_handle handle = device->handle; | |
352 | int error; | |
353 | ||
354 | mutex_lock(&acpi_scan_lock); | |
355 | ||
356 | error = acpi_scan_hot_remove(device); | |
357 | if (error && handle) | |
358 | acpi_evaluate_hotplug_ost(handle, ej_event->event, | |
359 | ACPI_OST_SC_NON_SPECIFIC_FAILURE, | |
360 | NULL); | |
361 | ||
362 | mutex_unlock(&acpi_scan_lock); | |
363 | kfree(context); | |
1da177e4 | 364 | } |
61622acc | 365 | EXPORT_SYMBOL(acpi_bus_hot_remove_device); |
1da177e4 | 366 | |
836aedb1 RW |
367 | static ssize_t real_power_state_show(struct device *dev, |
368 | struct device_attribute *attr, char *buf) | |
369 | { | |
370 | struct acpi_device *adev = to_acpi_device(dev); | |
371 | int state; | |
372 | int ret; | |
373 | ||
374 | ret = acpi_device_get_power(adev, &state); | |
375 | if (ret) | |
376 | return ret; | |
377 | ||
378 | return sprintf(buf, "%s\n", acpi_power_state_string(state)); | |
379 | } | |
380 | ||
381 | static DEVICE_ATTR(real_power_state, 0444, real_power_state_show, NULL); | |
382 | ||
383 | static ssize_t power_state_show(struct device *dev, | |
384 | struct device_attribute *attr, char *buf) | |
385 | { | |
386 | struct acpi_device *adev = to_acpi_device(dev); | |
387 | ||
388 | return sprintf(buf, "%s\n", acpi_power_state_string(adev->power.state)); | |
389 | } | |
390 | ||
391 | static DEVICE_ATTR(power_state, 0444, power_state_show, NULL); | |
392 | ||
1da177e4 | 393 | static ssize_t |
f883d9db PM |
394 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
395 | const char *buf, size_t count) | |
1da177e4 | 396 | { |
f883d9db | 397 | struct acpi_device *acpi_device = to_acpi_device(d); |
c4753e57 | 398 | struct acpi_eject_event *ej_event; |
a33ec399 RW |
399 | acpi_object_type not_used; |
400 | acpi_status status; | |
401 | u32 ost_source; | |
402 | int ret; | |
1da177e4 | 403 | |
a33ec399 | 404 | if (!count || buf[0] != '1') |
1da177e4 | 405 | return -EINVAL; |
1da177e4 | 406 | |
a33ec399 RW |
407 | if ((!acpi_device->handler || !acpi_device->handler->hotplug.enabled) |
408 | && !acpi_device->driver) | |
409 | return -ENODEV; | |
410 | ||
411 | status = acpi_get_type(acpi_device->handle, ¬_used); | |
412 | if (ACPI_FAILURE(status) || !acpi_device->flags.ejectable) | |
413 | return -ENODEV; | |
414 | ||
415 | mutex_lock(&acpi_scan_lock); | |
c4753e57 | 416 | |
c4753e57 | 417 | if (acpi_device->flags.eject_pending) { |
a33ec399 RW |
418 | /* ACPI eject notification event. */ |
419 | ost_source = ACPI_NOTIFY_EJECT_REQUEST; | |
c4753e57 TK |
420 | acpi_device->flags.eject_pending = 0; |
421 | } else { | |
a33ec399 RW |
422 | /* Eject initiated by user space. */ |
423 | ost_source = ACPI_OST_EC_OSPM_EJECT; | |
c4753e57 | 424 | } |
a33ec399 RW |
425 | ej_event = kmalloc(sizeof(*ej_event), GFP_KERNEL); |
426 | if (!ej_event) { | |
427 | ret = -ENOMEM; | |
428 | goto err_out; | |
429 | } | |
430 | acpi_evaluate_hotplug_ost(acpi_device->handle, ost_source, | |
431 | ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); | |
432 | ej_event->device = acpi_device; | |
433 | ej_event->event = ost_source; | |
434 | get_device(&acpi_device->dev); | |
3757b948 RW |
435 | status = acpi_os_hotplug_execute(acpi_bus_hot_remove_device, ej_event); |
436 | if (ACPI_FAILURE(status)) { | |
437 | put_device(&acpi_device->dev); | |
438 | kfree(ej_event); | |
a33ec399 RW |
439 | ret = status == AE_NO_MEMORY ? -ENOMEM : -EAGAIN; |
440 | goto err_out; | |
3757b948 | 441 | } |
a33ec399 RW |
442 | ret = count; |
443 | ||
444 | out: | |
445 | mutex_unlock(&acpi_scan_lock); | |
1da177e4 | 446 | return ret; |
a33ec399 RW |
447 | |
448 | err_out: | |
449 | acpi_evaluate_hotplug_ost(acpi_device->handle, ost_source, | |
450 | ACPI_OST_SC_NON_SPECIFIC_FAILURE, NULL); | |
451 | goto out; | |
1da177e4 LT |
452 | } |
453 | ||
f883d9db | 454 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
1da177e4 | 455 | |
e49bd2dd ZR |
456 | static ssize_t |
457 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
458 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1da177e4 | 459 | |
ea8d82fd | 460 | return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev)); |
1da177e4 | 461 | } |
e49bd2dd | 462 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
1da177e4 | 463 | |
923d4a45 LZ |
464 | static ssize_t acpi_device_uid_show(struct device *dev, |
465 | struct device_attribute *attr, char *buf) | |
466 | { | |
467 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
468 | ||
469 | return sprintf(buf, "%s\n", acpi_dev->pnp.unique_id); | |
470 | } | |
471 | static DEVICE_ATTR(uid, 0444, acpi_device_uid_show, NULL); | |
472 | ||
473 | static ssize_t acpi_device_adr_show(struct device *dev, | |
474 | struct device_attribute *attr, char *buf) | |
475 | { | |
476 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
477 | ||
478 | return sprintf(buf, "0x%08x\n", | |
479 | (unsigned int)(acpi_dev->pnp.bus_address)); | |
480 | } | |
481 | static DEVICE_ATTR(adr, 0444, acpi_device_adr_show, NULL); | |
482 | ||
e49bd2dd ZR |
483 | static ssize_t |
484 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
485 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
486 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
487 | int result; | |
1da177e4 | 488 | |
e49bd2dd | 489 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
0c526d96 | 490 | if (result) |
e49bd2dd | 491 | goto end; |
1da177e4 | 492 | |
e49bd2dd ZR |
493 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
494 | kfree(path.pointer); | |
0c526d96 | 495 | end: |
e49bd2dd | 496 | return result; |
1da177e4 | 497 | } |
e49bd2dd | 498 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
1da177e4 | 499 | |
d1efe3c3 LO |
500 | /* sysfs file that shows description text from the ACPI _STR method */ |
501 | static ssize_t description_show(struct device *dev, | |
502 | struct device_attribute *attr, | |
503 | char *buf) { | |
504 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
505 | int result; | |
506 | ||
507 | if (acpi_dev->pnp.str_obj == NULL) | |
508 | return 0; | |
509 | ||
510 | /* | |
511 | * The _STR object contains a Unicode identifier for a device. | |
512 | * We need to convert to utf-8 so it can be displayed. | |
513 | */ | |
514 | result = utf16s_to_utf8s( | |
515 | (wchar_t *)acpi_dev->pnp.str_obj->buffer.pointer, | |
516 | acpi_dev->pnp.str_obj->buffer.length, | |
517 | UTF16_LITTLE_ENDIAN, buf, | |
518 | PAGE_SIZE); | |
519 | ||
520 | buf[result++] = '\n'; | |
521 | ||
522 | return result; | |
523 | } | |
524 | static DEVICE_ATTR(description, 0444, description_show, NULL); | |
525 | ||
bb74ac23 YI |
526 | static ssize_t |
527 | acpi_device_sun_show(struct device *dev, struct device_attribute *attr, | |
528 | char *buf) { | |
529 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
530 | ||
531 | return sprintf(buf, "%lu\n", acpi_dev->pnp.sun); | |
532 | } | |
533 | static DEVICE_ATTR(sun, 0444, acpi_device_sun_show, NULL); | |
534 | ||
e49bd2dd | 535 | static int acpi_device_setup_files(struct acpi_device *dev) |
1da177e4 | 536 | { |
d1efe3c3 | 537 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
f883d9db PM |
538 | acpi_status status; |
539 | acpi_handle temp; | |
bb74ac23 | 540 | unsigned long long sun; |
e49bd2dd | 541 | int result = 0; |
1da177e4 LT |
542 | |
543 | /* | |
e49bd2dd | 544 | * Devices gotten from FADT don't have a "path" attribute |
1da177e4 | 545 | */ |
0c526d96 | 546 | if (dev->handle) { |
e49bd2dd | 547 | result = device_create_file(&dev->dev, &dev_attr_path); |
0c526d96 | 548 | if (result) |
e49bd2dd | 549 | goto end; |
1da177e4 LT |
550 | } |
551 | ||
2b2ae7c7 TR |
552 | if (!list_empty(&dev->pnp.ids)) { |
553 | result = device_create_file(&dev->dev, &dev_attr_hid); | |
554 | if (result) | |
555 | goto end; | |
1da177e4 | 556 | |
2b2ae7c7 TR |
557 | result = device_create_file(&dev->dev, &dev_attr_modalias); |
558 | if (result) | |
559 | goto end; | |
560 | } | |
29b71a1c | 561 | |
d1efe3c3 LO |
562 | /* |
563 | * If device has _STR, 'description' file is created | |
564 | */ | |
565 | status = acpi_get_handle(dev->handle, "_STR", &temp); | |
566 | if (ACPI_SUCCESS(status)) { | |
567 | status = acpi_evaluate_object(dev->handle, "_STR", | |
568 | NULL, &buffer); | |
569 | if (ACPI_FAILURE(status)) | |
570 | buffer.pointer = NULL; | |
571 | dev->pnp.str_obj = buffer.pointer; | |
572 | result = device_create_file(&dev->dev, &dev_attr_description); | |
573 | if (result) | |
574 | goto end; | |
575 | } | |
576 | ||
d4e1a692 | 577 | if (dev->pnp.type.bus_address) |
923d4a45 LZ |
578 | result = device_create_file(&dev->dev, &dev_attr_adr); |
579 | if (dev->pnp.unique_id) | |
580 | result = device_create_file(&dev->dev, &dev_attr_uid); | |
581 | ||
bb74ac23 YI |
582 | status = acpi_evaluate_integer(dev->handle, "_SUN", NULL, &sun); |
583 | if (ACPI_SUCCESS(status)) { | |
584 | dev->pnp.sun = (unsigned long)sun; | |
585 | result = device_create_file(&dev->dev, &dev_attr_sun); | |
586 | if (result) | |
587 | goto end; | |
588 | } else { | |
589 | dev->pnp.sun = (unsigned long)-1; | |
590 | } | |
591 | ||
e49bd2dd ZR |
592 | /* |
593 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
594 | * hot-removal function from userland. | |
595 | */ | |
f883d9db | 596 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); |
836aedb1 | 597 | if (ACPI_SUCCESS(status)) { |
e49bd2dd | 598 | result = device_create_file(&dev->dev, &dev_attr_eject); |
836aedb1 RW |
599 | if (result) |
600 | return result; | |
601 | } | |
602 | ||
603 | if (dev->flags.power_manageable) { | |
604 | result = device_create_file(&dev->dev, &dev_attr_power_state); | |
605 | if (result) | |
606 | return result; | |
607 | ||
608 | if (dev->power.flags.power_resources) | |
609 | result = device_create_file(&dev->dev, | |
610 | &dev_attr_real_power_state); | |
611 | } | |
612 | ||
0c526d96 | 613 | end: |
e49bd2dd | 614 | return result; |
1da177e4 LT |
615 | } |
616 | ||
f883d9db | 617 | static void acpi_device_remove_files(struct acpi_device *dev) |
1da177e4 | 618 | { |
f883d9db PM |
619 | acpi_status status; |
620 | acpi_handle temp; | |
1da177e4 | 621 | |
836aedb1 RW |
622 | if (dev->flags.power_manageable) { |
623 | device_remove_file(&dev->dev, &dev_attr_power_state); | |
624 | if (dev->power.flags.power_resources) | |
625 | device_remove_file(&dev->dev, | |
626 | &dev_attr_real_power_state); | |
627 | } | |
628 | ||
f883d9db | 629 | /* |
d1efe3c3 LO |
630 | * If device has _STR, remove 'description' file |
631 | */ | |
632 | status = acpi_get_handle(dev->handle, "_STR", &temp); | |
633 | if (ACPI_SUCCESS(status)) { | |
634 | kfree(dev->pnp.str_obj); | |
635 | device_remove_file(&dev->dev, &dev_attr_description); | |
636 | } | |
637 | /* | |
638 | * If device has _EJ0, remove 'eject' file. | |
f883d9db PM |
639 | */ |
640 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); | |
641 | if (ACPI_SUCCESS(status)) | |
642 | device_remove_file(&dev->dev, &dev_attr_eject); | |
1da177e4 | 643 | |
bb74ac23 YI |
644 | status = acpi_get_handle(dev->handle, "_SUN", &temp); |
645 | if (ACPI_SUCCESS(status)) | |
646 | device_remove_file(&dev->dev, &dev_attr_sun); | |
647 | ||
923d4a45 LZ |
648 | if (dev->pnp.unique_id) |
649 | device_remove_file(&dev->dev, &dev_attr_uid); | |
d4e1a692 | 650 | if (dev->pnp.type.bus_address) |
923d4a45 | 651 | device_remove_file(&dev->dev, &dev_attr_adr); |
1131b938 BH |
652 | device_remove_file(&dev->dev, &dev_attr_modalias); |
653 | device_remove_file(&dev->dev, &dev_attr_hid); | |
0c526d96 | 654 | if (dev->handle) |
e49bd2dd | 655 | device_remove_file(&dev->dev, &dev_attr_path); |
1da177e4 | 656 | } |
1da177e4 | 657 | /* -------------------------------------------------------------------------- |
9e89dde2 | 658 | ACPI Bus operations |
1da177e4 | 659 | -------------------------------------------------------------------------- */ |
29b71a1c | 660 | |
cf761af9 MW |
661 | static const struct acpi_device_id *__acpi_match_device( |
662 | struct acpi_device *device, const struct acpi_device_id *ids) | |
29b71a1c TR |
663 | { |
664 | const struct acpi_device_id *id; | |
7f47fa6c | 665 | struct acpi_hardware_id *hwid; |
29b71a1c | 666 | |
39a0ad87 ZY |
667 | /* |
668 | * If the device is not present, it is unnecessary to load device | |
669 | * driver for it. | |
670 | */ | |
671 | if (!device->status.present) | |
cf761af9 | 672 | return NULL; |
39a0ad87 | 673 | |
7f47fa6c BH |
674 | for (id = ids; id->id[0]; id++) |
675 | list_for_each_entry(hwid, &device->pnp.ids, list) | |
676 | if (!strcmp((char *) id->id, hwid->id)) | |
cf761af9 MW |
677 | return id; |
678 | ||
679 | return NULL; | |
680 | } | |
681 | ||
682 | /** | |
683 | * acpi_match_device - Match a struct device against a given list of ACPI IDs | |
684 | * @ids: Array of struct acpi_device_id object to match against. | |
685 | * @dev: The device structure to match. | |
686 | * | |
687 | * Check if @dev has a valid ACPI handle and if there is a struct acpi_device | |
688 | * object for that handle and use that object to match against a given list of | |
689 | * device IDs. | |
690 | * | |
691 | * Return a pointer to the first matching ID on success or %NULL on failure. | |
692 | */ | |
693 | const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids, | |
694 | const struct device *dev) | |
695 | { | |
696 | struct acpi_device *adev; | |
0613e1f7 | 697 | acpi_handle handle = ACPI_HANDLE(dev); |
cf761af9 | 698 | |
0613e1f7 | 699 | if (!ids || !handle || acpi_bus_get_device(handle, &adev)) |
cf761af9 MW |
700 | return NULL; |
701 | ||
702 | return __acpi_match_device(adev, ids); | |
703 | } | |
704 | EXPORT_SYMBOL_GPL(acpi_match_device); | |
29b71a1c | 705 | |
cf761af9 MW |
706 | int acpi_match_device_ids(struct acpi_device *device, |
707 | const struct acpi_device_id *ids) | |
708 | { | |
709 | return __acpi_match_device(device, ids) ? 0 : -ENOENT; | |
29b71a1c TR |
710 | } |
711 | EXPORT_SYMBOL(acpi_match_device_ids); | |
712 | ||
0b224527 RW |
713 | static void acpi_free_power_resources_lists(struct acpi_device *device) |
714 | { | |
715 | int i; | |
716 | ||
993cbe59 RW |
717 | if (device->wakeup.flags.valid) |
718 | acpi_power_resources_list_free(&device->wakeup.resources); | |
719 | ||
0b224527 RW |
720 | if (!device->flags.power_manageable) |
721 | return; | |
722 | ||
723 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) { | |
724 | struct acpi_device_power_state *ps = &device->power.states[i]; | |
725 | acpi_power_resources_list_free(&ps->resources); | |
726 | } | |
7f47fa6c BH |
727 | } |
728 | ||
1890a97a | 729 | static void acpi_device_release(struct device *dev) |
1da177e4 | 730 | { |
1890a97a | 731 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 732 | |
c0af4175 | 733 | acpi_free_pnp_ids(&acpi_dev->pnp); |
0b224527 | 734 | acpi_free_power_resources_lists(acpi_dev); |
1890a97a | 735 | kfree(acpi_dev); |
1da177e4 LT |
736 | } |
737 | ||
5d9464a4 | 738 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 739 | { |
5d9464a4 PM |
740 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
741 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
1da177e4 | 742 | |
209d3b17 | 743 | return acpi_dev->flags.match_driver |
805d410f | 744 | && !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
5d9464a4 | 745 | } |
1da177e4 | 746 | |
7eff2e7a | 747 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 | 748 | { |
5d9464a4 | 749 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
7eff2e7a | 750 | int len; |
5d9464a4 | 751 | |
2b2ae7c7 TR |
752 | if (list_empty(&acpi_dev->pnp.ids)) |
753 | return 0; | |
754 | ||
7eff2e7a KS |
755 | if (add_uevent_var(env, "MODALIAS=")) |
756 | return -ENOMEM; | |
757 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], | |
758 | sizeof(env->buf) - env->buflen); | |
759 | if (len >= (sizeof(env->buf) - env->buflen)) | |
760 | return -ENOMEM; | |
761 | env->buflen += len; | |
9e89dde2 | 762 | return 0; |
1da177e4 LT |
763 | } |
764 | ||
46ec8598 BH |
765 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
766 | { | |
767 | struct acpi_device *device = data; | |
768 | ||
769 | device->driver->ops.notify(device, event); | |
770 | } | |
771 | ||
772 | static acpi_status acpi_device_notify_fixed(void *data) | |
773 | { | |
774 | struct acpi_device *device = data; | |
775 | ||
53de5356 BH |
776 | /* Fixed hardware devices have no handles */ |
777 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); | |
46ec8598 BH |
778 | return AE_OK; |
779 | } | |
780 | ||
781 | static int acpi_device_install_notify_handler(struct acpi_device *device) | |
782 | { | |
783 | acpi_status status; | |
46ec8598 | 784 | |
ccba2a36 | 785 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
786 | status = |
787 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
788 | acpi_device_notify_fixed, | |
789 | device); | |
ccba2a36 | 790 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
791 | status = |
792 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
793 | acpi_device_notify_fixed, | |
794 | device); | |
795 | else | |
796 | status = acpi_install_notify_handler(device->handle, | |
797 | ACPI_DEVICE_NOTIFY, | |
798 | acpi_device_notify, | |
799 | device); | |
800 | ||
801 | if (ACPI_FAILURE(status)) | |
802 | return -EINVAL; | |
803 | return 0; | |
804 | } | |
805 | ||
806 | static void acpi_device_remove_notify_handler(struct acpi_device *device) | |
807 | { | |
ccba2a36 | 808 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
809 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, |
810 | acpi_device_notify_fixed); | |
ccba2a36 | 811 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
812 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, |
813 | acpi_device_notify_fixed); | |
814 | else | |
815 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, | |
816 | acpi_device_notify); | |
817 | } | |
818 | ||
5d9464a4 | 819 | static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *); |
5d9464a4 | 820 | static int acpi_device_probe(struct device * dev) |
1da177e4 | 821 | { |
5d9464a4 PM |
822 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
823 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
824 | int ret; | |
825 | ||
826 | ret = acpi_bus_driver_init(acpi_dev, acpi_drv); | |
827 | if (!ret) { | |
46ec8598 BH |
828 | if (acpi_drv->ops.notify) { |
829 | ret = acpi_device_install_notify_handler(acpi_dev); | |
830 | if (ret) { | |
46ec8598 | 831 | if (acpi_drv->ops.remove) |
51fac838 | 832 | acpi_drv->ops.remove(acpi_dev); |
5f27ee8e TK |
833 | acpi_dev->driver = NULL; |
834 | acpi_dev->driver_data = NULL; | |
46ec8598 BH |
835 | return ret; |
836 | } | |
837 | } | |
838 | ||
5d9464a4 PM |
839 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
840 | "Found driver [%s] for device [%s]\n", | |
841 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
842 | get_device(dev); | |
843 | } | |
844 | return ret; | |
845 | } | |
1da177e4 | 846 | |
5d9464a4 PM |
847 | static int acpi_device_remove(struct device * dev) |
848 | { | |
849 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
850 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
851 | ||
852 | if (acpi_drv) { | |
46ec8598 BH |
853 | if (acpi_drv->ops.notify) |
854 | acpi_device_remove_notify_handler(acpi_dev); | |
5d9464a4 | 855 | if (acpi_drv->ops.remove) |
51fac838 | 856 | acpi_drv->ops.remove(acpi_dev); |
1da177e4 | 857 | } |
5d9464a4 | 858 | acpi_dev->driver = NULL; |
db89b4f0 | 859 | acpi_dev->driver_data = NULL; |
1da177e4 | 860 | |
5d9464a4 | 861 | put_device(dev); |
9e89dde2 ZR |
862 | return 0; |
863 | } | |
1da177e4 | 864 | |
55955aad | 865 | struct bus_type acpi_bus_type = { |
9e89dde2 | 866 | .name = "acpi", |
5d9464a4 PM |
867 | .match = acpi_bus_match, |
868 | .probe = acpi_device_probe, | |
869 | .remove = acpi_device_remove, | |
870 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
871 | }; |
872 | ||
cf860be6 RW |
873 | int acpi_device_add(struct acpi_device *device, |
874 | void (*release)(struct device *)) | |
1da177e4 | 875 | { |
4be44fcd | 876 | int result; |
e49bd2dd ZR |
877 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
878 | int found = 0; | |
66b7ed40 | 879 | |
d43e167d RW |
880 | if (device->handle) { |
881 | acpi_status status; | |
882 | ||
883 | status = acpi_attach_data(device->handle, acpi_bus_data_handler, | |
884 | device); | |
885 | if (ACPI_FAILURE(status)) { | |
886 | acpi_handle_err(device->handle, | |
887 | "Unable to attach device data\n"); | |
888 | return -ENODEV; | |
889 | } | |
890 | } | |
891 | ||
9e89dde2 ZR |
892 | /* |
893 | * Linkage | |
894 | * ------- | |
895 | * Link this device to its parent and siblings. | |
896 | */ | |
897 | INIT_LIST_HEAD(&device->children); | |
898 | INIT_LIST_HEAD(&device->node); | |
9e89dde2 | 899 | INIT_LIST_HEAD(&device->wakeup_list); |
1033f904 LT |
900 | INIT_LIST_HEAD(&device->physical_node_list); |
901 | mutex_init(&device->physical_node_lock); | |
bc9b6407 | 902 | INIT_LIST_HEAD(&device->power_dependent); |
1da177e4 | 903 | |
e49bd2dd ZR |
904 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
905 | if (!new_bus_id) { | |
d43e167d RW |
906 | pr_err(PREFIX "Memory allocation error\n"); |
907 | result = -ENOMEM; | |
908 | goto err_detach; | |
1da177e4 | 909 | } |
e49bd2dd | 910 | |
9090589d | 911 | mutex_lock(&acpi_device_lock); |
e49bd2dd ZR |
912 | /* |
913 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
914 | * If failed, create one and link it into acpi_bus_id_list | |
915 | */ | |
916 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
1131b938 BH |
917 | if (!strcmp(acpi_device_bus_id->bus_id, |
918 | acpi_device_hid(device))) { | |
919 | acpi_device_bus_id->instance_no++; | |
e49bd2dd ZR |
920 | found = 1; |
921 | kfree(new_bus_id); | |
922 | break; | |
923 | } | |
1da177e4 | 924 | } |
0c526d96 | 925 | if (!found) { |
e49bd2dd | 926 | acpi_device_bus_id = new_bus_id; |
1131b938 | 927 | strcpy(acpi_device_bus_id->bus_id, acpi_device_hid(device)); |
e49bd2dd ZR |
928 | acpi_device_bus_id->instance_no = 0; |
929 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 930 | } |
0794469d | 931 | dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 932 | |
33b57150 | 933 | if (device->parent) |
9e89dde2 | 934 | list_add_tail(&device->node, &device->parent->children); |
33b57150 | 935 | |
9e89dde2 ZR |
936 | if (device->wakeup.flags.valid) |
937 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
9090589d | 938 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 939 | |
1890a97a | 940 | if (device->parent) |
66b7ed40 | 941 | device->dev.parent = &device->parent->dev; |
1890a97a | 942 | device->dev.bus = &acpi_bus_type; |
82c7d5ef | 943 | device->dev.release = release; |
cf860be6 | 944 | result = device_add(&device->dev); |
0c526d96 | 945 | if (result) { |
8b12b922 | 946 | dev_err(&device->dev, "Error registering device\n"); |
d43e167d | 947 | goto err; |
1da177e4 | 948 | } |
1da177e4 | 949 | |
e49bd2dd | 950 | result = acpi_device_setup_files(device); |
0c526d96 | 951 | if (result) |
0794469d KS |
952 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
953 | dev_name(&device->dev)); | |
1da177e4 | 954 | |
96333578 | 955 | device->removal_type = ACPI_BUS_REMOVAL_NORMAL; |
1da177e4 | 956 | return 0; |
d43e167d RW |
957 | |
958 | err: | |
9090589d | 959 | mutex_lock(&acpi_device_lock); |
33b57150 | 960 | if (device->parent) |
e49bd2dd | 961 | list_del(&device->node); |
e49bd2dd | 962 | list_del(&device->wakeup_list); |
9090589d | 963 | mutex_unlock(&acpi_device_lock); |
d43e167d RW |
964 | |
965 | err_detach: | |
966 | acpi_detach_data(device->handle, acpi_bus_data_handler); | |
e49bd2dd | 967 | return result; |
1da177e4 LT |
968 | } |
969 | ||
b17b537a | 970 | static void acpi_device_unregister(struct acpi_device *device) |
9e89dde2 | 971 | { |
9090589d | 972 | mutex_lock(&acpi_device_lock); |
33b57150 | 973 | if (device->parent) |
9e89dde2 | 974 | list_del(&device->node); |
1da177e4 | 975 | |
9e89dde2 | 976 | list_del(&device->wakeup_list); |
9090589d | 977 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 978 | |
9e89dde2 | 979 | acpi_detach_data(device->handle, acpi_bus_data_handler); |
1890a97a | 980 | |
bc9b6407 | 981 | acpi_power_add_remove_device(device, false); |
f883d9db | 982 | acpi_device_remove_files(device); |
b1c0f99b RW |
983 | if (device->remove) |
984 | device->remove(device); | |
985 | ||
cf860be6 | 986 | device_del(&device->dev); |
bc9b6407 | 987 | /* |
0aa120a0 RW |
988 | * Transition the device to D3cold to drop the reference counts of all |
989 | * power resources the device depends on and turn off the ones that have | |
990 | * no more references. | |
bc9b6407 | 991 | */ |
0aa120a0 | 992 | acpi_device_set_power(device, ACPI_STATE_D3_COLD); |
3757b948 | 993 | device->handle = NULL; |
cf860be6 | 994 | put_device(&device->dev); |
1da177e4 LT |
995 | } |
996 | ||
9e89dde2 ZR |
997 | /* -------------------------------------------------------------------------- |
998 | Driver Management | |
999 | -------------------------------------------------------------------------- */ | |
1da177e4 | 1000 | /** |
d758a8fa RD |
1001 | * acpi_bus_driver_init - add a device to a driver |
1002 | * @device: the device to add and initialize | |
1003 | * @driver: driver for the device | |
1004 | * | |
0c526d96 | 1005 | * Used to initialize a device via its device driver. Called whenever a |
1890a97a | 1006 | * driver is bound to a device. Invokes the driver's add() ops. |
1da177e4 LT |
1007 | */ |
1008 | static int | |
4be44fcd | 1009 | acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) |
1da177e4 | 1010 | { |
4be44fcd | 1011 | int result = 0; |
1da177e4 | 1012 | |
1da177e4 | 1013 | if (!device || !driver) |
d550d98d | 1014 | return -EINVAL; |
1da177e4 LT |
1015 | |
1016 | if (!driver->ops.add) | |
d550d98d | 1017 | return -ENOSYS; |
1da177e4 LT |
1018 | |
1019 | result = driver->ops.add(device); | |
8c9b7a7b | 1020 | if (result) |
d550d98d | 1021 | return result; |
1da177e4 LT |
1022 | |
1023 | device->driver = driver; | |
1024 | ||
1025 | /* | |
1026 | * TBD - Configuration Management: Assign resources to device based | |
1027 | * upon possible configuration and currently allocated resources. | |
1028 | */ | |
1029 | ||
4be44fcd LB |
1030 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
1031 | "Driver successfully bound to device\n")); | |
d550d98d | 1032 | return 0; |
3fb02738 RS |
1033 | } |
1034 | ||
9e89dde2 ZR |
1035 | /** |
1036 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
1037 | * @driver: driver being registered | |
1038 | * | |
1039 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
1040 | * devices that match the driver's criteria and binds. Returns zero for | |
1041 | * success or a negative error status for failure. | |
1042 | */ | |
1043 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
1da177e4 | 1044 | { |
1890a97a | 1045 | int ret; |
1da177e4 | 1046 | |
9e89dde2 ZR |
1047 | if (acpi_disabled) |
1048 | return -ENODEV; | |
1890a97a PM |
1049 | driver->drv.name = driver->name; |
1050 | driver->drv.bus = &acpi_bus_type; | |
1051 | driver->drv.owner = driver->owner; | |
1da177e4 | 1052 | |
1890a97a PM |
1053 | ret = driver_register(&driver->drv); |
1054 | return ret; | |
9e89dde2 | 1055 | } |
1da177e4 | 1056 | |
9e89dde2 ZR |
1057 | EXPORT_SYMBOL(acpi_bus_register_driver); |
1058 | ||
1059 | /** | |
1060 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus | |
1061 | * @driver: driver to unregister | |
1062 | * | |
1063 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
1064 | * devices that match the driver's criteria and unbinds. | |
1065 | */ | |
1066 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
1067 | { | |
1890a97a | 1068 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
1069 | } |
1070 | ||
1071 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
1072 | ||
9e89dde2 ZR |
1073 | /* -------------------------------------------------------------------------- |
1074 | Device Enumeration | |
1075 | -------------------------------------------------------------------------- */ | |
5c478f49 BH |
1076 | static struct acpi_device *acpi_bus_get_parent(acpi_handle handle) |
1077 | { | |
456de893 | 1078 | struct acpi_device *device = NULL; |
5c478f49 | 1079 | acpi_status status; |
5c478f49 BH |
1080 | |
1081 | /* | |
1082 | * Fixed hardware devices do not appear in the namespace and do not | |
1083 | * have handles, but we fabricate acpi_devices for them, so we have | |
1084 | * to deal with them specially. | |
1085 | */ | |
456de893 | 1086 | if (!handle) |
5c478f49 BH |
1087 | return acpi_root; |
1088 | ||
1089 | do { | |
1090 | status = acpi_get_parent(handle, &handle); | |
5c478f49 | 1091 | if (ACPI_FAILURE(status)) |
456de893 RW |
1092 | return status == AE_NULL_ENTRY ? NULL : acpi_root; |
1093 | } while (acpi_bus_get_device(handle, &device)); | |
1094 | return device; | |
5c478f49 BH |
1095 | } |
1096 | ||
9e89dde2 ZR |
1097 | acpi_status |
1098 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
1099 | { | |
1100 | acpi_status status; | |
1101 | acpi_handle tmp; | |
1102 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
1103 | union acpi_object *obj; | |
1104 | ||
1105 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
1106 | if (ACPI_FAILURE(status)) | |
1107 | return status; | |
1108 | ||
1109 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
1110 | if (ACPI_SUCCESS(status)) { | |
1111 | obj = buffer.pointer; | |
3b5fee59 HM |
1112 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
1113 | ejd); | |
9e89dde2 ZR |
1114 | kfree(buffer.pointer); |
1115 | } | |
1116 | return status; | |
1117 | } | |
1118 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
1119 | ||
8e4319c4 | 1120 | void acpi_bus_data_handler(acpi_handle handle, void *context) |
9e89dde2 ZR |
1121 | { |
1122 | ||
1123 | /* TBD */ | |
1124 | ||
1125 | return; | |
1126 | } | |
1127 | ||
e88c9c60 RW |
1128 | static int acpi_bus_extract_wakeup_device_power_package(acpi_handle handle, |
1129 | struct acpi_device_wakeup *wakeup) | |
9e89dde2 | 1130 | { |
b581a7f9 RW |
1131 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1132 | union acpi_object *package = NULL; | |
9e89dde2 | 1133 | union acpi_object *element = NULL; |
b581a7f9 | 1134 | acpi_status status; |
e88c9c60 | 1135 | int err = -ENODATA; |
9e89dde2 | 1136 | |
b581a7f9 | 1137 | if (!wakeup) |
e88c9c60 | 1138 | return -EINVAL; |
9e89dde2 | 1139 | |
993cbe59 | 1140 | INIT_LIST_HEAD(&wakeup->resources); |
9e89dde2 | 1141 | |
b581a7f9 RW |
1142 | /* _PRW */ |
1143 | status = acpi_evaluate_object(handle, "_PRW", NULL, &buffer); | |
1144 | if (ACPI_FAILURE(status)) { | |
1145 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
e88c9c60 | 1146 | return err; |
b581a7f9 RW |
1147 | } |
1148 | ||
1149 | package = (union acpi_object *)buffer.pointer; | |
1150 | ||
e88c9c60 | 1151 | if (!package || package->package.count < 2) |
b581a7f9 | 1152 | goto out; |
b581a7f9 | 1153 | |
9e89dde2 | 1154 | element = &(package->package.elements[0]); |
e88c9c60 | 1155 | if (!element) |
b581a7f9 | 1156 | goto out; |
e88c9c60 | 1157 | |
9e89dde2 ZR |
1158 | if (element->type == ACPI_TYPE_PACKAGE) { |
1159 | if ((element->package.count < 2) || | |
1160 | (element->package.elements[0].type != | |
1161 | ACPI_TYPE_LOCAL_REFERENCE) | |
e88c9c60 | 1162 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) |
b581a7f9 | 1163 | goto out; |
e88c9c60 | 1164 | |
b581a7f9 | 1165 | wakeup->gpe_device = |
9e89dde2 | 1166 | element->package.elements[0].reference.handle; |
b581a7f9 | 1167 | wakeup->gpe_number = |
9e89dde2 ZR |
1168 | (u32) element->package.elements[1].integer.value; |
1169 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
b581a7f9 RW |
1170 | wakeup->gpe_device = NULL; |
1171 | wakeup->gpe_number = element->integer.value; | |
1172 | } else { | |
b581a7f9 RW |
1173 | goto out; |
1174 | } | |
9e89dde2 ZR |
1175 | |
1176 | element = &(package->package.elements[1]); | |
e88c9c60 | 1177 | if (element->type != ACPI_TYPE_INTEGER) |
b581a7f9 | 1178 | goto out; |
e88c9c60 | 1179 | |
b581a7f9 | 1180 | wakeup->sleep_state = element->integer.value; |
9e89dde2 | 1181 | |
e88c9c60 RW |
1182 | err = acpi_extract_power_resources(package, 2, &wakeup->resources); |
1183 | if (err) | |
b581a7f9 | 1184 | goto out; |
9e89dde2 | 1185 | |
0596a52b RW |
1186 | if (!list_empty(&wakeup->resources)) { |
1187 | int sleep_state; | |
9e89dde2 | 1188 | |
b5d667eb RW |
1189 | err = acpi_power_wakeup_list_init(&wakeup->resources, |
1190 | &sleep_state); | |
1191 | if (err) { | |
1192 | acpi_handle_warn(handle, "Retrieving current states " | |
1193 | "of wakeup power resources failed\n"); | |
1194 | acpi_power_resources_list_free(&wakeup->resources); | |
1195 | goto out; | |
1196 | } | |
0596a52b RW |
1197 | if (sleep_state < wakeup->sleep_state) { |
1198 | acpi_handle_warn(handle, "Overriding _PRW sleep state " | |
1199 | "(S%d) by S%d from power resources\n", | |
1200 | (int)wakeup->sleep_state, sleep_state); | |
1201 | wakeup->sleep_state = sleep_state; | |
1202 | } | |
1203 | } | |
bba63a29 | 1204 | acpi_setup_gpe_for_wake(handle, wakeup->gpe_device, wakeup->gpe_number); |
9874647b | 1205 | |
b581a7f9 RW |
1206 | out: |
1207 | kfree(buffer.pointer); | |
e88c9c60 | 1208 | return err; |
1da177e4 LT |
1209 | } |
1210 | ||
f517709d | 1211 | static void acpi_bus_set_run_wake_flags(struct acpi_device *device) |
1da177e4 | 1212 | { |
29b71a1c | 1213 | struct acpi_device_id button_device_ids[] = { |
29b71a1c | 1214 | {"PNP0C0C", 0}, |
b7e38304 | 1215 | {"PNP0C0D", 0}, |
29b71a1c TR |
1216 | {"PNP0C0E", 0}, |
1217 | {"", 0}, | |
1218 | }; | |
f517709d RW |
1219 | acpi_status status; |
1220 | acpi_event_status event_status; | |
1221 | ||
b67ea761 | 1222 | device->wakeup.flags.notifier_present = 0; |
f517709d RW |
1223 | |
1224 | /* Power button, Lid switch always enable wakeup */ | |
1225 | if (!acpi_match_device_ids(device, button_device_ids)) { | |
1226 | device->wakeup.flags.run_wake = 1; | |
b7e38304 ZR |
1227 | if (!acpi_match_device_ids(device, &button_device_ids[1])) { |
1228 | /* Do not use Lid/sleep button for S5 wakeup */ | |
1229 | if (device->wakeup.sleep_state == ACPI_STATE_S5) | |
1230 | device->wakeup.sleep_state = ACPI_STATE_S4; | |
1231 | } | |
f2b56bc8 | 1232 | device_set_wakeup_capable(&device->dev, true); |
f517709d RW |
1233 | return; |
1234 | } | |
1235 | ||
e8e18c95 RW |
1236 | status = acpi_get_gpe_status(device->wakeup.gpe_device, |
1237 | device->wakeup.gpe_number, | |
1238 | &event_status); | |
f517709d RW |
1239 | if (status == AE_OK) |
1240 | device->wakeup.flags.run_wake = | |
1241 | !!(event_status & ACPI_EVENT_FLAG_HANDLE); | |
1242 | } | |
1243 | ||
d57d09a4 | 1244 | static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
f517709d | 1245 | { |
d57d09a4 | 1246 | acpi_handle temp; |
f517709d | 1247 | acpi_status status = 0; |
e88c9c60 | 1248 | int err; |
29b71a1c | 1249 | |
d57d09a4 RW |
1250 | /* Presence of _PRW indicates wake capable */ |
1251 | status = acpi_get_handle(device->handle, "_PRW", &temp); | |
1252 | if (ACPI_FAILURE(status)) | |
1253 | return; | |
1254 | ||
e88c9c60 RW |
1255 | err = acpi_bus_extract_wakeup_device_power_package(device->handle, |
1256 | &device->wakeup); | |
1257 | if (err) { | |
1258 | dev_err(&device->dev, "_PRW evaluation error: %d\n", err); | |
d57d09a4 | 1259 | return; |
9e89dde2 | 1260 | } |
1da177e4 | 1261 | |
9e89dde2 | 1262 | device->wakeup.flags.valid = 1; |
9b83ccd2 | 1263 | device->wakeup.prepare_count = 0; |
f517709d | 1264 | acpi_bus_set_run_wake_flags(device); |
729b2bdb ZY |
1265 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
1266 | * system for the ACPI device with the _PRW object. | |
1267 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. | |
1268 | * So it is necessary to call _DSW object first. Only when it is not | |
1269 | * present will the _PSW object used. | |
1270 | */ | |
e88c9c60 RW |
1271 | err = acpi_device_sleep_wake(device, 0, 0, 0); |
1272 | if (err) | |
77e76609 RW |
1273 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
1274 | "error in _DSW or _PSW evaluation\n")); | |
1da177e4 | 1275 | } |
1da177e4 | 1276 | |
f33ce568 RW |
1277 | static void acpi_bus_init_power_state(struct acpi_device *device, int state) |
1278 | { | |
1279 | struct acpi_device_power_state *ps = &device->power.states[state]; | |
ef85bdbe RW |
1280 | char pathname[5] = { '_', 'P', 'R', '0' + state, '\0' }; |
1281 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
f33ce568 RW |
1282 | acpi_handle handle; |
1283 | acpi_status status; | |
bf325f95 | 1284 | |
f33ce568 RW |
1285 | INIT_LIST_HEAD(&ps->resources); |
1286 | ||
ef85bdbe RW |
1287 | /* Evaluate "_PRx" to get referenced power resources */ |
1288 | status = acpi_evaluate_object(device->handle, pathname, NULL, &buffer); | |
1289 | if (ACPI_SUCCESS(status)) { | |
1290 | union acpi_object *package = buffer.pointer; | |
1291 | ||
1292 | if (buffer.length && package | |
1293 | && package->type == ACPI_TYPE_PACKAGE | |
1294 | && package->package.count) { | |
e88c9c60 RW |
1295 | int err = acpi_extract_power_resources(package, 0, |
1296 | &ps->resources); | |
1297 | if (!err) | |
ef85bdbe | 1298 | device->power.flags.power_resources = 1; |
f33ce568 | 1299 | } |
ef85bdbe | 1300 | ACPI_FREE(buffer.pointer); |
f33ce568 RW |
1301 | } |
1302 | ||
1303 | /* Evaluate "_PSx" to see if we can do explicit sets */ | |
ef85bdbe RW |
1304 | pathname[2] = 'S'; |
1305 | status = acpi_get_handle(device->handle, pathname, &handle); | |
f33ce568 RW |
1306 | if (ACPI_SUCCESS(status)) |
1307 | ps->flags.explicit_set = 1; | |
1308 | ||
1309 | /* | |
1310 | * State is valid if there are means to put the device into it. | |
1311 | * D3hot is only valid if _PR3 present. | |
1312 | */ | |
ef85bdbe | 1313 | if (!list_empty(&ps->resources) |
f33ce568 RW |
1314 | || (ps->flags.explicit_set && state < ACPI_STATE_D3_HOT)) { |
1315 | ps->flags.valid = 1; | |
1316 | ps->flags.os_accessible = 1; | |
1317 | } | |
1318 | ||
1319 | ps->power = -1; /* Unknown - driver assigned */ | |
1320 | ps->latency = -1; /* Unknown - driver assigned */ | |
1321 | } | |
1322 | ||
d43e167d | 1323 | static void acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 1324 | { |
8bc5053b RW |
1325 | acpi_status status; |
1326 | acpi_handle handle; | |
1327 | u32 i; | |
1a365616 | 1328 | |
d43e167d RW |
1329 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ |
1330 | status = acpi_get_handle(device->handle, "_PS0", &handle); | |
1331 | if (ACPI_FAILURE(status)) { | |
1332 | status = acpi_get_handle(device->handle, "_PR0", &handle); | |
1333 | if (ACPI_FAILURE(status)) | |
1334 | return; | |
1335 | } | |
1a365616 | 1336 | |
d43e167d | 1337 | device->flags.power_manageable = 1; |
4be44fcd | 1338 | |
9e89dde2 ZR |
1339 | /* |
1340 | * Power Management Flags | |
1341 | */ | |
1342 | status = acpi_get_handle(device->handle, "_PSC", &handle); | |
1343 | if (ACPI_SUCCESS(status)) | |
1344 | device->power.flags.explicit_get = 1; | |
1345 | status = acpi_get_handle(device->handle, "_IRC", &handle); | |
1346 | if (ACPI_SUCCESS(status)) | |
1347 | device->power.flags.inrush_current = 1; | |
1da177e4 | 1348 | |
9e89dde2 ZR |
1349 | /* |
1350 | * Enumerate supported power management states | |
1351 | */ | |
f33ce568 RW |
1352 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) |
1353 | acpi_bus_init_power_state(device, i); | |
bf325f95 | 1354 | |
0b224527 | 1355 | INIT_LIST_HEAD(&device->power.states[ACPI_STATE_D3_COLD].resources); |
1da177e4 | 1356 | |
9e89dde2 ZR |
1357 | /* Set defaults for D0 and D3 states (always valid) */ |
1358 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
1359 | device->power.states[ACPI_STATE_D0].power = 100; | |
1360 | device->power.states[ACPI_STATE_D3].flags.valid = 1; | |
1361 | device->power.states[ACPI_STATE_D3].power = 0; | |
c8f7a62c | 1362 | |
5c7dd710 RW |
1363 | /* Set D3cold's explicit_set flag if _PS3 exists. */ |
1364 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set) | |
1365 | device->power.states[ACPI_STATE_D3_COLD].flags.explicit_set = 1; | |
1366 | ||
1399dfcd AL |
1367 | /* Presence of _PS3 or _PRx means we can put the device into D3 cold */ |
1368 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set || | |
1369 | device->power.flags.power_resources) | |
1370 | device->power.states[ACPI_STATE_D3_COLD].flags.os_accessible = 1; | |
1371 | ||
b3785492 RW |
1372 | if (acpi_bus_init_power(device)) { |
1373 | acpi_free_power_resources_lists(device); | |
1374 | device->flags.power_manageable = 0; | |
1375 | } | |
9e89dde2 | 1376 | } |
c8f7a62c | 1377 | |
d43e167d | 1378 | static void acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 1379 | { |
4be44fcd LB |
1380 | acpi_status status = AE_OK; |
1381 | acpi_handle temp = NULL; | |
1da177e4 | 1382 | |
1da177e4 LT |
1383 | /* Presence of _STA indicates 'dynamic_status' */ |
1384 | status = acpi_get_handle(device->handle, "_STA", &temp); | |
1385 | if (ACPI_SUCCESS(status)) | |
1386 | device->flags.dynamic_status = 1; | |
1387 | ||
1da177e4 LT |
1388 | /* Presence of _RMV indicates 'removable' */ |
1389 | status = acpi_get_handle(device->handle, "_RMV", &temp); | |
1390 | if (ACPI_SUCCESS(status)) | |
1391 | device->flags.removable = 1; | |
1392 | ||
1393 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
1394 | status = acpi_get_handle(device->handle, "_EJD", &temp); | |
1395 | if (ACPI_SUCCESS(status)) | |
1396 | device->flags.ejectable = 1; | |
1397 | else { | |
1398 | status = acpi_get_handle(device->handle, "_EJ0", &temp); | |
1399 | if (ACPI_SUCCESS(status)) | |
1400 | device->flags.ejectable = 1; | |
1401 | } | |
1da177e4 LT |
1402 | } |
1403 | ||
c7bcb4e9 | 1404 | static void acpi_device_get_busid(struct acpi_device *device) |
1da177e4 | 1405 | { |
4be44fcd LB |
1406 | char bus_id[5] = { '?', 0 }; |
1407 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
1408 | int i = 0; | |
1da177e4 LT |
1409 | |
1410 | /* | |
1411 | * Bus ID | |
1412 | * ------ | |
1413 | * The device's Bus ID is simply the object name. | |
1414 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
1415 | */ | |
859ac9a4 | 1416 | if (ACPI_IS_ROOT_DEVICE(device)) { |
1da177e4 | 1417 | strcpy(device->pnp.bus_id, "ACPI"); |
859ac9a4 BH |
1418 | return; |
1419 | } | |
1420 | ||
1421 | switch (device->device_type) { | |
1da177e4 LT |
1422 | case ACPI_BUS_TYPE_POWER_BUTTON: |
1423 | strcpy(device->pnp.bus_id, "PWRF"); | |
1424 | break; | |
1425 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
1426 | strcpy(device->pnp.bus_id, "SLPF"); | |
1427 | break; | |
1428 | default: | |
66b7ed40 | 1429 | acpi_get_name(device->handle, ACPI_SINGLE_NAME, &buffer); |
1da177e4 LT |
1430 | /* Clean up trailing underscores (if any) */ |
1431 | for (i = 3; i > 1; i--) { | |
1432 | if (bus_id[i] == '_') | |
1433 | bus_id[i] = '\0'; | |
1434 | else | |
1435 | break; | |
1436 | } | |
1437 | strcpy(device->pnp.bus_id, bus_id); | |
1438 | break; | |
1439 | } | |
1440 | } | |
1441 | ||
54735266 | 1442 | /* |
d4e1a692 | 1443 | * acpi_bay_match - see if an acpi object is an ejectable driver bay |
54735266 ZR |
1444 | * |
1445 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
1446 | * then we can safely call it an ejectable drive bay | |
1447 | */ | |
d4e1a692 TK |
1448 | static int acpi_bay_match(acpi_handle handle) |
1449 | { | |
54735266 | 1450 | acpi_status status; |
54735266 ZR |
1451 | acpi_handle tmp; |
1452 | acpi_handle phandle; | |
1453 | ||
54735266 ZR |
1454 | status = acpi_get_handle(handle, "_EJ0", &tmp); |
1455 | if (ACPI_FAILURE(status)) | |
1456 | return -ENODEV; | |
1457 | ||
1458 | if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || | |
1459 | (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || | |
1460 | (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || | |
1461 | (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) | |
1462 | return 0; | |
1463 | ||
1464 | if (acpi_get_parent(handle, &phandle)) | |
1465 | return -ENODEV; | |
1466 | ||
1467 | if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) || | |
1468 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) || | |
1469 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) || | |
1470 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp)))) | |
1471 | return 0; | |
1472 | ||
1473 | return -ENODEV; | |
1474 | } | |
1475 | ||
3620f2f2 | 1476 | /* |
d4e1a692 | 1477 | * acpi_dock_match - see if an acpi object has a _DCK method |
3620f2f2 | 1478 | */ |
d4e1a692 | 1479 | static int acpi_dock_match(acpi_handle handle) |
3620f2f2 FS |
1480 | { |
1481 | acpi_handle tmp; | |
d4e1a692 | 1482 | return acpi_get_handle(handle, "_DCK", &tmp); |
3620f2f2 FS |
1483 | } |
1484 | ||
620e112c | 1485 | const char *acpi_device_hid(struct acpi_device *device) |
15b8dd53 | 1486 | { |
7f47fa6c | 1487 | struct acpi_hardware_id *hid; |
15b8dd53 | 1488 | |
2b2ae7c7 TR |
1489 | if (list_empty(&device->pnp.ids)) |
1490 | return dummy_hid; | |
1491 | ||
7f47fa6c BH |
1492 | hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list); |
1493 | return hid->id; | |
1494 | } | |
1495 | EXPORT_SYMBOL(acpi_device_hid); | |
15b8dd53 | 1496 | |
d4e1a692 | 1497 | static void acpi_add_id(struct acpi_device_pnp *pnp, const char *dev_id) |
7f47fa6c BH |
1498 | { |
1499 | struct acpi_hardware_id *id; | |
15b8dd53 | 1500 | |
7f47fa6c BH |
1501 | id = kmalloc(sizeof(*id), GFP_KERNEL); |
1502 | if (!id) | |
1503 | return; | |
15b8dd53 | 1504 | |
581de59e | 1505 | id->id = kstrdup(dev_id, GFP_KERNEL); |
7f47fa6c BH |
1506 | if (!id->id) { |
1507 | kfree(id); | |
1508 | return; | |
15b8dd53 BM |
1509 | } |
1510 | ||
d4e1a692 TK |
1511 | list_add_tail(&id->list, &pnp->ids); |
1512 | pnp->type.hardware_id = 1; | |
15b8dd53 BM |
1513 | } |
1514 | ||
222e82ac DW |
1515 | /* |
1516 | * Old IBM workstations have a DSDT bug wherein the SMBus object | |
1517 | * lacks the SMBUS01 HID and the methods do not have the necessary "_" | |
1518 | * prefix. Work around this. | |
1519 | */ | |
d4e1a692 | 1520 | static int acpi_ibm_smbus_match(acpi_handle handle) |
222e82ac DW |
1521 | { |
1522 | acpi_handle h_dummy; | |
1523 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
1524 | int result; | |
1525 | ||
1526 | if (!dmi_name_in_vendors("IBM")) | |
1527 | return -ENODEV; | |
1528 | ||
1529 | /* Look for SMBS object */ | |
d4e1a692 | 1530 | result = acpi_get_name(handle, ACPI_SINGLE_NAME, &path); |
222e82ac DW |
1531 | if (result) |
1532 | return result; | |
1533 | ||
1534 | if (strcmp("SMBS", path.pointer)) { | |
1535 | result = -ENODEV; | |
1536 | goto out; | |
1537 | } | |
1538 | ||
1539 | /* Does it have the necessary (but misnamed) methods? */ | |
1540 | result = -ENODEV; | |
d4e1a692 TK |
1541 | if (ACPI_SUCCESS(acpi_get_handle(handle, "SBI", &h_dummy)) && |
1542 | ACPI_SUCCESS(acpi_get_handle(handle, "SBR", &h_dummy)) && | |
1543 | ACPI_SUCCESS(acpi_get_handle(handle, "SBW", &h_dummy))) | |
222e82ac DW |
1544 | result = 0; |
1545 | out: | |
1546 | kfree(path.pointer); | |
1547 | return result; | |
1548 | } | |
1549 | ||
c0af4175 TK |
1550 | static void acpi_set_pnp_ids(acpi_handle handle, struct acpi_device_pnp *pnp, |
1551 | int device_type) | |
1da177e4 | 1552 | { |
4be44fcd | 1553 | acpi_status status; |
57f3674f | 1554 | struct acpi_device_info *info; |
78e25fef | 1555 | struct acpi_pnp_device_id_list *cid_list; |
7f47fa6c | 1556 | int i; |
1da177e4 | 1557 | |
c0af4175 | 1558 | switch (device_type) { |
1da177e4 | 1559 | case ACPI_BUS_TYPE_DEVICE: |
c0af4175 TK |
1560 | if (handle == ACPI_ROOT_OBJECT) { |
1561 | acpi_add_id(pnp, ACPI_SYSTEM_HID); | |
859ac9a4 BH |
1562 | break; |
1563 | } | |
1564 | ||
c0af4175 | 1565 | status = acpi_get_object_info(handle, &info); |
1da177e4 | 1566 | if (ACPI_FAILURE(status)) { |
c0af4175 TK |
1567 | pr_err(PREFIX "%s: Error reading device info\n", |
1568 | __func__); | |
1da177e4 LT |
1569 | return; |
1570 | } | |
1571 | ||
1da177e4 | 1572 | if (info->valid & ACPI_VALID_HID) |
c0af4175 | 1573 | acpi_add_id(pnp, info->hardware_id.string); |
57f3674f | 1574 | if (info->valid & ACPI_VALID_CID) { |
15b8dd53 | 1575 | cid_list = &info->compatible_id_list; |
57f3674f | 1576 | for (i = 0; i < cid_list->count; i++) |
c0af4175 | 1577 | acpi_add_id(pnp, cid_list->ids[i].string); |
57f3674f | 1578 | } |
1da177e4 | 1579 | if (info->valid & ACPI_VALID_ADR) { |
c0af4175 TK |
1580 | pnp->bus_address = info->address; |
1581 | pnp->type.bus_address = 1; | |
1da177e4 | 1582 | } |
ccf78040 | 1583 | if (info->valid & ACPI_VALID_UID) |
c0af4175 | 1584 | pnp->unique_id = kstrdup(info->unique_id.string, |
ccf78040 | 1585 | GFP_KERNEL); |
ae843332 | 1586 | |
a83893ae BH |
1587 | kfree(info); |
1588 | ||
57f3674f BH |
1589 | /* |
1590 | * Some devices don't reliably have _HIDs & _CIDs, so add | |
1591 | * synthetic HIDs to make sure drivers can find them. | |
1592 | */ | |
c0af4175 TK |
1593 | if (acpi_is_video_device(handle)) |
1594 | acpi_add_id(pnp, ACPI_VIDEO_HID); | |
1595 | else if (ACPI_SUCCESS(acpi_bay_match(handle))) | |
1596 | acpi_add_id(pnp, ACPI_BAY_HID); | |
1597 | else if (ACPI_SUCCESS(acpi_dock_match(handle))) | |
1598 | acpi_add_id(pnp, ACPI_DOCK_HID); | |
1599 | else if (!acpi_ibm_smbus_match(handle)) | |
1600 | acpi_add_id(pnp, ACPI_SMBUS_IBM_HID); | |
1601 | else if (list_empty(&pnp->ids) && handle == ACPI_ROOT_OBJECT) { | |
1602 | acpi_add_id(pnp, ACPI_BUS_HID); /* \_SB, LNXSYBUS */ | |
1603 | strcpy(pnp->device_name, ACPI_BUS_DEVICE_NAME); | |
1604 | strcpy(pnp->device_class, ACPI_BUS_CLASS); | |
b7b30de5 | 1605 | } |
54735266 | 1606 | |
1da177e4 LT |
1607 | break; |
1608 | case ACPI_BUS_TYPE_POWER: | |
c0af4175 | 1609 | acpi_add_id(pnp, ACPI_POWER_HID); |
1da177e4 LT |
1610 | break; |
1611 | case ACPI_BUS_TYPE_PROCESSOR: | |
c0af4175 | 1612 | acpi_add_id(pnp, ACPI_PROCESSOR_OBJECT_HID); |
1da177e4 | 1613 | break; |
1da177e4 | 1614 | case ACPI_BUS_TYPE_THERMAL: |
c0af4175 | 1615 | acpi_add_id(pnp, ACPI_THERMAL_HID); |
1da177e4 LT |
1616 | break; |
1617 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
c0af4175 | 1618 | acpi_add_id(pnp, ACPI_BUTTON_HID_POWERF); |
1da177e4 LT |
1619 | break; |
1620 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
c0af4175 | 1621 | acpi_add_id(pnp, ACPI_BUTTON_HID_SLEEPF); |
1da177e4 LT |
1622 | break; |
1623 | } | |
1da177e4 LT |
1624 | } |
1625 | ||
c0af4175 TK |
1626 | void acpi_free_pnp_ids(struct acpi_device_pnp *pnp) |
1627 | { | |
1628 | struct acpi_hardware_id *id, *tmp; | |
1629 | ||
1630 | list_for_each_entry_safe(id, tmp, &pnp->ids, list) { | |
1631 | kfree(id->id); | |
1632 | kfree(id); | |
1633 | } | |
1634 | kfree(pnp->unique_id); | |
1635 | } | |
1636 | ||
82c7d5ef RW |
1637 | void acpi_init_device_object(struct acpi_device *device, acpi_handle handle, |
1638 | int type, unsigned long long sta) | |
1da177e4 | 1639 | { |
d43e167d RW |
1640 | INIT_LIST_HEAD(&device->pnp.ids); |
1641 | device->device_type = type; | |
1642 | device->handle = handle; | |
1643 | device->parent = acpi_bus_get_parent(handle); | |
1644 | STRUCT_TO_INT(device->status) = sta; | |
1645 | acpi_device_get_busid(device); | |
c0af4175 | 1646 | acpi_set_pnp_ids(handle, &device->pnp, type); |
d43e167d | 1647 | acpi_bus_get_flags(device); |
2c0d4fe0 | 1648 | device->flags.match_driver = false; |
cf860be6 RW |
1649 | device_initialize(&device->dev); |
1650 | dev_set_uevent_suppress(&device->dev, true); | |
1651 | } | |
bc3b0772 | 1652 | |
cf860be6 RW |
1653 | void acpi_device_add_finalize(struct acpi_device *device) |
1654 | { | |
2c0d4fe0 | 1655 | device->flags.match_driver = true; |
cf860be6 RW |
1656 | dev_set_uevent_suppress(&device->dev, false); |
1657 | kobject_uevent(&device->dev.kobj, KOBJ_ADD); | |
1da177e4 LT |
1658 | } |
1659 | ||
5c478f49 BH |
1660 | static int acpi_add_single_object(struct acpi_device **child, |
1661 | acpi_handle handle, int type, | |
2c0d4fe0 | 1662 | unsigned long long sta) |
1da177e4 | 1663 | { |
77c24888 BH |
1664 | int result; |
1665 | struct acpi_device *device; | |
29aaefa6 | 1666 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 1667 | |
36bcbec7 | 1668 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 1669 | if (!device) { |
6468463a | 1670 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 1671 | return -ENOMEM; |
1da177e4 | 1672 | } |
1da177e4 | 1673 | |
d43e167d RW |
1674 | acpi_init_device_object(device, handle, type, sta); |
1675 | acpi_bus_get_power_flags(device); | |
d57d09a4 | 1676 | acpi_bus_get_wakeup_device_flags(device); |
1da177e4 | 1677 | |
cf860be6 | 1678 | result = acpi_device_add(device, acpi_device_release); |
d43e167d | 1679 | if (result) { |
718fb0de | 1680 | acpi_device_release(&device->dev); |
d43e167d RW |
1681 | return result; |
1682 | } | |
1da177e4 | 1683 | |
d43e167d | 1684 | acpi_power_add_remove_device(device, true); |
cf860be6 | 1685 | acpi_device_add_finalize(device); |
d43e167d RW |
1686 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); |
1687 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Added %s [%s] parent %s\n", | |
1688 | dev_name(&device->dev), (char *) buffer.pointer, | |
1689 | device->parent ? dev_name(&device->parent->dev) : "(null)")); | |
1690 | kfree(buffer.pointer); | |
1691 | *child = device; | |
1692 | return 0; | |
bf325f95 RW |
1693 | } |
1694 | ||
778cbc1d BH |
1695 | static int acpi_bus_type_and_status(acpi_handle handle, int *type, |
1696 | unsigned long long *sta) | |
1da177e4 | 1697 | { |
778cbc1d BH |
1698 | acpi_status status; |
1699 | acpi_object_type acpi_type; | |
1da177e4 | 1700 | |
778cbc1d | 1701 | status = acpi_get_type(handle, &acpi_type); |
51a85faf | 1702 | if (ACPI_FAILURE(status)) |
778cbc1d | 1703 | return -ENODEV; |
4be44fcd | 1704 | |
778cbc1d | 1705 | switch (acpi_type) { |
51a85faf BH |
1706 | case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */ |
1707 | case ACPI_TYPE_DEVICE: | |
778cbc1d BH |
1708 | *type = ACPI_BUS_TYPE_DEVICE; |
1709 | status = acpi_bus_get_status_handle(handle, sta); | |
1710 | if (ACPI_FAILURE(status)) | |
1711 | return -ENODEV; | |
51a85faf BH |
1712 | break; |
1713 | case ACPI_TYPE_PROCESSOR: | |
778cbc1d BH |
1714 | *type = ACPI_BUS_TYPE_PROCESSOR; |
1715 | status = acpi_bus_get_status_handle(handle, sta); | |
1716 | if (ACPI_FAILURE(status)) | |
1717 | return -ENODEV; | |
51a85faf BH |
1718 | break; |
1719 | case ACPI_TYPE_THERMAL: | |
778cbc1d BH |
1720 | *type = ACPI_BUS_TYPE_THERMAL; |
1721 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1722 | break; |
1723 | case ACPI_TYPE_POWER: | |
778cbc1d BH |
1724 | *type = ACPI_BUS_TYPE_POWER; |
1725 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1726 | break; |
1727 | default: | |
778cbc1d | 1728 | return -ENODEV; |
51a85faf | 1729 | } |
1da177e4 | 1730 | |
778cbc1d BH |
1731 | return 0; |
1732 | } | |
1733 | ||
4b59cc1f RW |
1734 | static bool acpi_scan_handler_matching(struct acpi_scan_handler *handler, |
1735 | char *idstr, | |
1736 | const struct acpi_device_id **matchid) | |
1737 | { | |
1738 | const struct acpi_device_id *devid; | |
1739 | ||
1740 | for (devid = handler->ids; devid->id[0]; devid++) | |
1741 | if (!strcmp((char *)devid->id, idstr)) { | |
1742 | if (matchid) | |
1743 | *matchid = devid; | |
1744 | ||
1745 | return true; | |
1746 | } | |
1747 | ||
1748 | return false; | |
1749 | } | |
1750 | ||
6b772e8f TK |
1751 | static struct acpi_scan_handler *acpi_scan_match_handler(char *idstr, |
1752 | const struct acpi_device_id **matchid) | |
1753 | { | |
1754 | struct acpi_scan_handler *handler; | |
1755 | ||
1756 | list_for_each_entry(handler, &acpi_scan_handlers_list, list_node) | |
1757 | if (acpi_scan_handler_matching(handler, idstr, matchid)) | |
1758 | return handler; | |
1759 | ||
1760 | return NULL; | |
1761 | } | |
1762 | ||
3f8055c3 RW |
1763 | void acpi_scan_hotplug_enabled(struct acpi_hotplug_profile *hotplug, bool val) |
1764 | { | |
3f8055c3 RW |
1765 | if (!!hotplug->enabled == !!val) |
1766 | return; | |
1767 | ||
1768 | mutex_lock(&acpi_scan_lock); | |
1769 | ||
1770 | hotplug->enabled = val; | |
3f8055c3 RW |
1771 | |
1772 | mutex_unlock(&acpi_scan_lock); | |
1773 | } | |
1774 | ||
6b772e8f | 1775 | static void acpi_scan_init_hotplug(acpi_handle handle, int type) |
a33ec399 | 1776 | { |
6b772e8f TK |
1777 | struct acpi_device_pnp pnp = {}; |
1778 | struct acpi_hardware_id *hwid; | |
a33ec399 RW |
1779 | struct acpi_scan_handler *handler; |
1780 | ||
6b772e8f TK |
1781 | INIT_LIST_HEAD(&pnp.ids); |
1782 | acpi_set_pnp_ids(handle, &pnp, type); | |
a33ec399 | 1783 | |
6b772e8f | 1784 | if (!pnp.type.hardware_id) |
7a26b530 | 1785 | goto out; |
a33ec399 RW |
1786 | |
1787 | /* | |
1788 | * This relies on the fact that acpi_install_notify_handler() will not | |
1789 | * install the same notify handler routine twice for the same handle. | |
1790 | */ | |
6b772e8f TK |
1791 | list_for_each_entry(hwid, &pnp.ids, list) { |
1792 | handler = acpi_scan_match_handler(hwid->id, NULL); | |
1793 | if (handler) { | |
2cbb14fb TK |
1794 | acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, |
1795 | acpi_hotplug_notify_cb, handler); | |
6b772e8f TK |
1796 | break; |
1797 | } | |
1798 | } | |
1799 | ||
7a26b530 | 1800 | out: |
6b772e8f | 1801 | acpi_free_pnp_ids(&pnp); |
a33ec399 RW |
1802 | } |
1803 | ||
e3863094 RW |
1804 | static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used, |
1805 | void *not_used, void **return_value) | |
778cbc1d | 1806 | { |
805d410f | 1807 | struct acpi_device *device = NULL; |
778cbc1d BH |
1808 | int type; |
1809 | unsigned long long sta; | |
e3b87f8a | 1810 | acpi_status status; |
778cbc1d BH |
1811 | int result; |
1812 | ||
4002bf38 RW |
1813 | acpi_bus_get_device(handle, &device); |
1814 | if (device) | |
1815 | goto out; | |
1816 | ||
778cbc1d BH |
1817 | result = acpi_bus_type_and_status(handle, &type, &sta); |
1818 | if (result) | |
1819 | return AE_OK; | |
1820 | ||
82c7d5ef RW |
1821 | if (type == ACPI_BUS_TYPE_POWER) { |
1822 | acpi_add_power_resource(handle); | |
1823 | return AE_OK; | |
1824 | } | |
1825 | ||
6b772e8f | 1826 | acpi_scan_init_hotplug(handle, type); |
a33ec399 | 1827 | |
778cbc1d | 1828 | if (!(sta & ACPI_STA_DEVICE_PRESENT) && |
b581a7f9 | 1829 | !(sta & ACPI_STA_DEVICE_FUNCTIONING)) { |
86e4e20e RW |
1830 | struct acpi_device_wakeup wakeup; |
1831 | acpi_handle temp; | |
1832 | ||
1833 | status = acpi_get_handle(handle, "_PRW", &temp); | |
993cbe59 | 1834 | if (ACPI_SUCCESS(status)) { |
86e4e20e RW |
1835 | acpi_bus_extract_wakeup_device_power_package(handle, |
1836 | &wakeup); | |
993cbe59 RW |
1837 | acpi_power_resources_list_free(&wakeup.resources); |
1838 | } | |
778cbc1d | 1839 | return AE_CTRL_DEPTH; |
b581a7f9 | 1840 | } |
778cbc1d | 1841 | |
2c0d4fe0 | 1842 | acpi_add_single_object(&device, handle, type, sta); |
e3b87f8a | 1843 | if (!device) |
51a85faf | 1844 | return AE_CTRL_DEPTH; |
1da177e4 | 1845 | |
4002bf38 | 1846 | out: |
51a85faf BH |
1847 | if (!*return_value) |
1848 | *return_value = device; | |
805d410f | 1849 | |
51a85faf BH |
1850 | return AE_OK; |
1851 | } | |
3fb02738 | 1852 | |
c5698074 | 1853 | static int acpi_scan_attach_handler(struct acpi_device *device) |
ca589f94 | 1854 | { |
c5698074 RW |
1855 | struct acpi_hardware_id *hwid; |
1856 | int ret = 0; | |
ca589f94 | 1857 | |
c5698074 | 1858 | list_for_each_entry(hwid, &device->pnp.ids, list) { |
87b85b3c | 1859 | const struct acpi_device_id *devid; |
c5698074 | 1860 | struct acpi_scan_handler *handler; |
ca589f94 | 1861 | |
c5698074 RW |
1862 | handler = acpi_scan_match_handler(hwid->id, &devid); |
1863 | if (handler) { | |
87b85b3c RW |
1864 | ret = handler->attach(device, devid); |
1865 | if (ret > 0) { | |
1866 | device->handler = handler; | |
c5698074 | 1867 | break; |
87b85b3c | 1868 | } else if (ret < 0) { |
c5698074 | 1869 | break; |
87b85b3c | 1870 | } |
ca589f94 RW |
1871 | } |
1872 | } | |
1873 | return ret; | |
1874 | } | |
1875 | ||
0fc300b0 RW |
1876 | static acpi_status acpi_bus_device_attach(acpi_handle handle, u32 lvl_not_used, |
1877 | void *not_used, void **ret_not_used) | |
51a85faf | 1878 | { |
805d410f RW |
1879 | struct acpi_device *device; |
1880 | unsigned long long sta_not_used; | |
ca589f94 | 1881 | int ret; |
3fb02738 | 1882 | |
805d410f RW |
1883 | /* |
1884 | * Ignore errors ignored by acpi_bus_check_add() to avoid terminating | |
1885 | * namespace walks prematurely. | |
1886 | */ | |
ca589f94 | 1887 | if (acpi_bus_type_and_status(handle, &ret, &sta_not_used)) |
805d410f | 1888 | return AE_OK; |
1da177e4 | 1889 | |
805d410f RW |
1890 | if (acpi_bus_get_device(handle, &device)) |
1891 | return AE_CTRL_DEPTH; | |
7779688f | 1892 | |
ca589f94 RW |
1893 | ret = acpi_scan_attach_handler(device); |
1894 | if (ret) | |
1895 | return ret > 0 ? AE_OK : AE_CTRL_DEPTH; | |
1896 | ||
1897 | ret = device_attach(&device->dev); | |
1898 | return ret >= 0 ? AE_OK : AE_CTRL_DEPTH; | |
1da177e4 | 1899 | } |
1da177e4 | 1900 | |
636458de | 1901 | /** |
b8bd759a | 1902 | * acpi_bus_scan - Add ACPI device node objects in a given namespace scope. |
636458de | 1903 | * @handle: Root of the namespace scope to scan. |
7779688f | 1904 | * |
636458de RW |
1905 | * Scan a given ACPI tree (probably recently hot-plugged) and create and add |
1906 | * found devices. | |
7779688f | 1907 | * |
636458de RW |
1908 | * If no devices were found, -ENODEV is returned, but it does not mean that |
1909 | * there has been a real error. There just have been no suitable ACPI objects | |
1910 | * in the table trunk from which the kernel could create a device and add an | |
1911 | * appropriate driver. | |
3757b948 RW |
1912 | * |
1913 | * Must be called under acpi_scan_lock. | |
7779688f | 1914 | */ |
b8bd759a | 1915 | int acpi_bus_scan(acpi_handle handle) |
3fb02738 | 1916 | { |
b8bd759a | 1917 | void *device = NULL; |
c511cc19 | 1918 | int error = 0; |
3fb02738 | 1919 | |
b8bd759a RW |
1920 | if (ACPI_SUCCESS(acpi_bus_check_add(handle, 0, NULL, &device))) |
1921 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
1922 | acpi_bus_check_add, NULL, NULL, &device); | |
3fb02738 | 1923 | |
d2f6650a | 1924 | if (!device) |
c511cc19 RW |
1925 | error = -ENODEV; |
1926 | else if (ACPI_SUCCESS(acpi_bus_device_attach(handle, 0, NULL, NULL))) | |
b8bd759a RW |
1927 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
1928 | acpi_bus_device_attach, NULL, NULL, NULL); | |
3fb02738 | 1929 | |
c511cc19 | 1930 | return error; |
3fb02738 | 1931 | } |
b8bd759a | 1932 | EXPORT_SYMBOL(acpi_bus_scan); |
a2100801 | 1933 | |
05404d8f RW |
1934 | static acpi_status acpi_bus_device_detach(acpi_handle handle, u32 lvl_not_used, |
1935 | void *not_used, void **ret_not_used) | |
1936 | { | |
1937 | struct acpi_device *device = NULL; | |
a2100801 | 1938 | |
05404d8f | 1939 | if (!acpi_bus_get_device(handle, &device)) { |
ca589f94 RW |
1940 | struct acpi_scan_handler *dev_handler = device->handler; |
1941 | ||
05404d8f | 1942 | device->removal_type = ACPI_BUS_REMOVAL_EJECT; |
ca589f94 RW |
1943 | if (dev_handler) { |
1944 | if (dev_handler->detach) | |
1945 | dev_handler->detach(device); | |
1946 | ||
1947 | device->handler = NULL; | |
1948 | } else { | |
1949 | device_release_driver(&device->dev); | |
1950 | } | |
05404d8f RW |
1951 | } |
1952 | return AE_OK; | |
3fb02738 | 1953 | } |
1da177e4 | 1954 | |
05404d8f RW |
1955 | static acpi_status acpi_bus_remove(acpi_handle handle, u32 lvl_not_used, |
1956 | void *not_used, void **ret_not_used) | |
1da177e4 | 1957 | { |
05404d8f | 1958 | struct acpi_device *device = NULL; |
4be44fcd | 1959 | |
05404d8f RW |
1960 | if (!acpi_bus_get_device(handle, &device)) |
1961 | acpi_device_unregister(device); | |
1da177e4 | 1962 | |
05404d8f RW |
1963 | return AE_OK; |
1964 | } | |
1da177e4 | 1965 | |
3757b948 RW |
1966 | /** |
1967 | * acpi_bus_trim - Remove ACPI device node and all of its descendants | |
1968 | * @start: Root of the ACPI device nodes subtree to remove. | |
1969 | * | |
1970 | * Must be called under acpi_scan_lock. | |
1971 | */ | |
bfee26db | 1972 | void acpi_bus_trim(struct acpi_device *start) |
1da177e4 | 1973 | { |
05404d8f RW |
1974 | /* |
1975 | * Execute acpi_bus_device_detach() as a post-order callback to detach | |
1976 | * all ACPI drivers from the device nodes being removed. | |
1977 | */ | |
1978 | acpi_walk_namespace(ACPI_TYPE_ANY, start->handle, ACPI_UINT32_MAX, NULL, | |
1979 | acpi_bus_device_detach, NULL, NULL); | |
1980 | acpi_bus_device_detach(start->handle, 0, NULL, NULL); | |
cecdb193 RW |
1981 | /* |
1982 | * Execute acpi_bus_remove() as a post-order callback to remove device | |
1983 | * nodes in the given namespace scope. | |
1984 | */ | |
1985 | acpi_walk_namespace(ACPI_TYPE_ANY, start->handle, ACPI_UINT32_MAX, NULL, | |
1986 | acpi_bus_remove, NULL, NULL); | |
1987 | acpi_bus_remove(start->handle, 0, NULL, NULL); | |
1da177e4 | 1988 | } |
ceaba663 KA |
1989 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
1990 | ||
e8b945c9 | 1991 | static int acpi_bus_scan_fixed(void) |
1da177e4 | 1992 | { |
4be44fcd | 1993 | int result = 0; |
c4168bff | 1994 | |
1da177e4 LT |
1995 | /* |
1996 | * Enumerate all fixed-feature devices. | |
1997 | */ | |
2c0d4fe0 RW |
1998 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON)) { |
1999 | struct acpi_device *device = NULL; | |
2000 | ||
5c478f49 | 2001 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 2002 | ACPI_BUS_TYPE_POWER_BUTTON, |
2c0d4fe0 RW |
2003 | ACPI_STA_DEFAULT); |
2004 | if (result) | |
2005 | return result; | |
2006 | ||
2007 | result = device_attach(&device->dev); | |
2008 | if (result < 0) | |
2009 | return result; | |
2010 | ||
c10d7a13 | 2011 | device_init_wakeup(&device->dev, true); |
3fb02738 | 2012 | } |
1da177e4 | 2013 | |
2c0d4fe0 RW |
2014 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON)) { |
2015 | struct acpi_device *device = NULL; | |
2016 | ||
5c478f49 | 2017 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 2018 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
2c0d4fe0 RW |
2019 | ACPI_STA_DEFAULT); |
2020 | if (result) | |
2021 | return result; | |
2022 | ||
2023 | result = device_attach(&device->dev); | |
3fb02738 | 2024 | } |
1da177e4 | 2025 | |
2c0d4fe0 | 2026 | return result < 0 ? result : 0; |
1da177e4 LT |
2027 | } |
2028 | ||
e747f274 | 2029 | int __init acpi_scan_init(void) |
1da177e4 LT |
2030 | { |
2031 | int result; | |
1da177e4 | 2032 | |
5b327265 PM |
2033 | result = bus_register(&acpi_bus_type); |
2034 | if (result) { | |
2035 | /* We don't want to quit even if we failed to add suspend/resume */ | |
2036 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
2037 | } | |
2038 | ||
92ef2a25 | 2039 | acpi_pci_root_init(); |
4daeaf68 | 2040 | acpi_pci_link_init(); |
141a297b | 2041 | acpi_platform_init(); |
f58b082a | 2042 | acpi_lpss_init(); |
737f1a9f | 2043 | acpi_container_init(); |
0a347644 | 2044 | acpi_memory_hotplug_init(); |
97d9a9e9 | 2045 | |
3757b948 | 2046 | mutex_lock(&acpi_scan_lock); |
1da177e4 LT |
2047 | /* |
2048 | * Enumerate devices in the ACPI namespace. | |
2049 | */ | |
0cd6ac52 RW |
2050 | result = acpi_bus_scan(ACPI_ROOT_OBJECT); |
2051 | if (result) | |
3757b948 | 2052 | goto out; |
1da177e4 | 2053 | |
0cd6ac52 | 2054 | result = acpi_bus_get_device(ACPI_ROOT_OBJECT, &acpi_root); |
1da177e4 | 2055 | if (result) |
3757b948 | 2056 | goto out; |
1da177e4 | 2057 | |
b8bd759a RW |
2058 | result = acpi_bus_scan_fixed(); |
2059 | if (result) { | |
b17b537a | 2060 | acpi_device_unregister(acpi_root); |
3757b948 | 2061 | goto out; |
b8bd759a | 2062 | } |
1da177e4 | 2063 | |
b8bd759a | 2064 | acpi_update_all_gpes(); |
3757b948 | 2065 | |
668192b6 YL |
2066 | acpi_pci_root_hp_init(); |
2067 | ||
3757b948 RW |
2068 | out: |
2069 | mutex_unlock(&acpi_scan_lock); | |
2070 | return result; | |
1da177e4 | 2071 | } |