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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 | |
91e56878 MW |
32 | /* |
33 | * The following ACPI IDs are known to be suitable for representing as | |
34 | * platform devices. | |
35 | */ | |
36 | static const struct acpi_device_id acpi_platform_device_ids[] = { | |
37 | ||
142b007b AH |
38 | { "PNP0D40" }, |
39 | ||
5e7779f0 MW |
40 | /* Haswell LPSS devices */ |
41 | { "INT33C0", 0 }, | |
42 | { "INT33C1", 0 }, | |
43 | { "INT33C2", 0 }, | |
44 | { "INT33C3", 0 }, | |
45 | { "INT33C4", 0 }, | |
46 | { "INT33C5", 0 }, | |
47 | { "INT33C6", 0 }, | |
48 | { "INT33C7", 0 }, | |
49 | ||
91e56878 MW |
50 | { } |
51 | }; | |
52 | ||
1da177e4 | 53 | static LIST_HEAD(acpi_device_list); |
e49bd2dd | 54 | static LIST_HEAD(acpi_bus_id_list); |
9090589d | 55 | DEFINE_MUTEX(acpi_device_lock); |
1da177e4 LT |
56 | LIST_HEAD(acpi_wakeup_device_list); |
57 | ||
e49bd2dd | 58 | struct acpi_device_bus_id{ |
bb095854 | 59 | char bus_id[15]; |
e49bd2dd ZR |
60 | unsigned int instance_no; |
61 | struct list_head node; | |
1da177e4 | 62 | }; |
29b71a1c TR |
63 | |
64 | /* | |
65 | * Creates hid/cid(s) string needed for modalias and uevent | |
66 | * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: | |
67 | * char *modalias: "acpi:IBM0001:ACPI0001" | |
68 | */ | |
b3e572d2 AB |
69 | static int create_modalias(struct acpi_device *acpi_dev, char *modalias, |
70 | int size) | |
71 | { | |
29b71a1c | 72 | int len; |
5c9fcb5d | 73 | int count; |
7f47fa6c | 74 | struct acpi_hardware_id *id; |
29b71a1c | 75 | |
2b2ae7c7 TR |
76 | if (list_empty(&acpi_dev->pnp.ids)) |
77 | return 0; | |
78 | ||
5c9fcb5d | 79 | len = snprintf(modalias, size, "acpi:"); |
29b71a1c TR |
80 | size -= len; |
81 | ||
7f47fa6c BH |
82 | list_for_each_entry(id, &acpi_dev->pnp.ids, list) { |
83 | count = snprintf(&modalias[len], size, "%s:", id->id); | |
5c9fcb5d ZR |
84 | if (count < 0 || count >= size) |
85 | return -EINVAL; | |
86 | len += count; | |
87 | size -= count; | |
88 | } | |
89 | ||
29b71a1c TR |
90 | modalias[len] = '\0'; |
91 | return len; | |
92 | } | |
93 | ||
94 | static ssize_t | |
95 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
96 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
97 | int len; | |
98 | ||
99 | /* Device has no HID and no CID or string is >1024 */ | |
100 | len = create_modalias(acpi_dev, buf, 1024); | |
101 | if (len <= 0) | |
102 | return 0; | |
103 | buf[len++] = '\n'; | |
104 | return len; | |
105 | } | |
106 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); | |
107 | ||
c4753e57 TK |
108 | /** |
109 | * acpi_bus_hot_remove_device: hot-remove a device and its children | |
110 | * @context: struct acpi_eject_event pointer (freed in this func) | |
111 | * | |
112 | * Hot-remove a device and its children. This function frees up the | |
113 | * memory space passed by arg context, so that the caller may call | |
114 | * this function asynchronously through acpi_os_hotplug_execute(). | |
115 | */ | |
116 | void acpi_bus_hot_remove_device(void *context) | |
1da177e4 | 117 | { |
c4753e57 | 118 | struct acpi_eject_event *ej_event = (struct acpi_eject_event *) context; |
5993c467 YL |
119 | struct acpi_device *device = ej_event->device; |
120 | acpi_handle handle = device->handle; | |
b3c450c3 | 121 | acpi_handle temp; |
1da177e4 LT |
122 | struct acpi_object_list arg_list; |
123 | union acpi_object arg; | |
124 | acpi_status status = AE_OK; | |
c4753e57 | 125 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; /* default */ |
1da177e4 | 126 | |
26d46867 | 127 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
0794469d | 128 | "Hot-removing device %s...\n", dev_name(&device->dev))); |
26d46867 | 129 | |
ae281795 | 130 | if (acpi_bus_trim(device)) { |
55ac9a01 LM |
131 | printk(KERN_ERR PREFIX |
132 | "Removing device failed\n"); | |
c4753e57 | 133 | goto err_out; |
26d46867 | 134 | } |
1da177e4 | 135 | |
b3c450c3 TK |
136 | /* device has been freed */ |
137 | device = NULL; | |
138 | ||
26d46867 ZR |
139 | /* power off device */ |
140 | status = acpi_evaluate_object(handle, "_PS3", NULL, NULL); | |
141 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) | |
55ac9a01 LM |
142 | printk(KERN_WARNING PREFIX |
143 | "Power-off device failed\n"); | |
26d46867 | 144 | |
b3c450c3 | 145 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_LCK", &temp))) { |
1da177e4 LT |
146 | arg_list.count = 1; |
147 | arg_list.pointer = &arg; | |
148 | arg.type = ACPI_TYPE_INTEGER; | |
149 | arg.integer.value = 0; | |
150 | acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); | |
151 | } | |
1da177e4 | 152 | |
1da177e4 LT |
153 | arg_list.count = 1; |
154 | arg_list.pointer = &arg; | |
155 | arg.type = ACPI_TYPE_INTEGER; | |
156 | arg.integer.value = 1; | |
1da177e4 | 157 | |
1da177e4 LT |
158 | /* |
159 | * TBD: _EJD support. | |
160 | */ | |
1da177e4 | 161 | status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); |
c4753e57 TK |
162 | if (ACPI_FAILURE(status)) { |
163 | if (status != AE_NOT_FOUND) | |
164 | printk(KERN_WARNING PREFIX | |
165 | "Eject device failed\n"); | |
166 | goto err_out; | |
167 | } | |
1da177e4 | 168 | |
c4753e57 TK |
169 | kfree(context); |
170 | return; | |
1da177e4 | 171 | |
c4753e57 TK |
172 | err_out: |
173 | /* Inform firmware the hot-remove operation has completed w/ error */ | |
174 | (void) acpi_evaluate_hotplug_ost(handle, | |
175 | ej_event->event, ost_code, NULL); | |
176 | kfree(context); | |
c8d72a5e | 177 | return; |
1da177e4 | 178 | } |
61622acc | 179 | EXPORT_SYMBOL(acpi_bus_hot_remove_device); |
1da177e4 | 180 | |
1da177e4 | 181 | static ssize_t |
f883d9db PM |
182 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
183 | const char *buf, size_t count) | |
1da177e4 | 184 | { |
4be44fcd | 185 | int ret = count; |
4be44fcd | 186 | acpi_status status; |
4be44fcd | 187 | acpi_object_type type = 0; |
f883d9db | 188 | struct acpi_device *acpi_device = to_acpi_device(d); |
c4753e57 | 189 | struct acpi_eject_event *ej_event; |
1da177e4 | 190 | |
1da177e4 LT |
191 | if ((!count) || (buf[0] != '1')) { |
192 | return -EINVAL; | |
193 | } | |
1da177e4 | 194 | #ifndef FORCE_EJECT |
f883d9db | 195 | if (acpi_device->driver == NULL) { |
1da177e4 LT |
196 | ret = -ENODEV; |
197 | goto err; | |
198 | } | |
199 | #endif | |
f883d9db PM |
200 | status = acpi_get_type(acpi_device->handle, &type); |
201 | if (ACPI_FAILURE(status) || (!acpi_device->flags.ejectable)) { | |
1da177e4 LT |
202 | ret = -ENODEV; |
203 | goto err; | |
204 | } | |
1da177e4 | 205 | |
c4753e57 TK |
206 | ej_event = kmalloc(sizeof(*ej_event), GFP_KERNEL); |
207 | if (!ej_event) { | |
208 | ret = -ENOMEM; | |
209 | goto err; | |
210 | } | |
211 | ||
5993c467 | 212 | ej_event->device = acpi_device; |
c4753e57 TK |
213 | if (acpi_device->flags.eject_pending) { |
214 | /* event originated from ACPI eject notification */ | |
215 | ej_event->event = ACPI_NOTIFY_EJECT_REQUEST; | |
216 | acpi_device->flags.eject_pending = 0; | |
217 | } else { | |
218 | /* event originated from user */ | |
219 | ej_event->event = ACPI_OST_EC_OSPM_EJECT; | |
5993c467 | 220 | (void) acpi_evaluate_hotplug_ost(acpi_device->handle, |
c4753e57 TK |
221 | ej_event->event, ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); |
222 | } | |
223 | ||
224 | acpi_os_hotplug_execute(acpi_bus_hot_remove_device, (void *)ej_event); | |
74523c90 | 225 | err: |
1da177e4 | 226 | return ret; |
1da177e4 LT |
227 | } |
228 | ||
f883d9db | 229 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
1da177e4 | 230 | |
e49bd2dd ZR |
231 | static ssize_t |
232 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
233 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1da177e4 | 234 | |
ea8d82fd | 235 | return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev)); |
1da177e4 | 236 | } |
e49bd2dd | 237 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
1da177e4 | 238 | |
923d4a45 LZ |
239 | static ssize_t acpi_device_uid_show(struct device *dev, |
240 | struct device_attribute *attr, char *buf) | |
241 | { | |
242 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
243 | ||
244 | return sprintf(buf, "%s\n", acpi_dev->pnp.unique_id); | |
245 | } | |
246 | static DEVICE_ATTR(uid, 0444, acpi_device_uid_show, NULL); | |
247 | ||
248 | static ssize_t acpi_device_adr_show(struct device *dev, | |
249 | struct device_attribute *attr, char *buf) | |
250 | { | |
251 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
252 | ||
253 | return sprintf(buf, "0x%08x\n", | |
254 | (unsigned int)(acpi_dev->pnp.bus_address)); | |
255 | } | |
256 | static DEVICE_ATTR(adr, 0444, acpi_device_adr_show, NULL); | |
257 | ||
e49bd2dd ZR |
258 | static ssize_t |
259 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
260 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
261 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
262 | int result; | |
1da177e4 | 263 | |
e49bd2dd | 264 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
0c526d96 | 265 | if (result) |
e49bd2dd | 266 | goto end; |
1da177e4 | 267 | |
e49bd2dd ZR |
268 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
269 | kfree(path.pointer); | |
0c526d96 | 270 | end: |
e49bd2dd | 271 | return result; |
1da177e4 | 272 | } |
e49bd2dd | 273 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
1da177e4 | 274 | |
d1efe3c3 LO |
275 | /* sysfs file that shows description text from the ACPI _STR method */ |
276 | static ssize_t description_show(struct device *dev, | |
277 | struct device_attribute *attr, | |
278 | char *buf) { | |
279 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
280 | int result; | |
281 | ||
282 | if (acpi_dev->pnp.str_obj == NULL) | |
283 | return 0; | |
284 | ||
285 | /* | |
286 | * The _STR object contains a Unicode identifier for a device. | |
287 | * We need to convert to utf-8 so it can be displayed. | |
288 | */ | |
289 | result = utf16s_to_utf8s( | |
290 | (wchar_t *)acpi_dev->pnp.str_obj->buffer.pointer, | |
291 | acpi_dev->pnp.str_obj->buffer.length, | |
292 | UTF16_LITTLE_ENDIAN, buf, | |
293 | PAGE_SIZE); | |
294 | ||
295 | buf[result++] = '\n'; | |
296 | ||
297 | return result; | |
298 | } | |
299 | static DEVICE_ATTR(description, 0444, description_show, NULL); | |
300 | ||
bb74ac23 YI |
301 | static ssize_t |
302 | acpi_device_sun_show(struct device *dev, struct device_attribute *attr, | |
303 | char *buf) { | |
304 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
305 | ||
306 | return sprintf(buf, "%lu\n", acpi_dev->pnp.sun); | |
307 | } | |
308 | static DEVICE_ATTR(sun, 0444, acpi_device_sun_show, NULL); | |
309 | ||
e49bd2dd | 310 | static int acpi_device_setup_files(struct acpi_device *dev) |
1da177e4 | 311 | { |
d1efe3c3 | 312 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
f883d9db PM |
313 | acpi_status status; |
314 | acpi_handle temp; | |
bb74ac23 | 315 | unsigned long long sun; |
e49bd2dd | 316 | int result = 0; |
1da177e4 LT |
317 | |
318 | /* | |
e49bd2dd | 319 | * Devices gotten from FADT don't have a "path" attribute |
1da177e4 | 320 | */ |
0c526d96 | 321 | if (dev->handle) { |
e49bd2dd | 322 | result = device_create_file(&dev->dev, &dev_attr_path); |
0c526d96 | 323 | if (result) |
e49bd2dd | 324 | goto end; |
1da177e4 LT |
325 | } |
326 | ||
2b2ae7c7 TR |
327 | if (!list_empty(&dev->pnp.ids)) { |
328 | result = device_create_file(&dev->dev, &dev_attr_hid); | |
329 | if (result) | |
330 | goto end; | |
1da177e4 | 331 | |
2b2ae7c7 TR |
332 | result = device_create_file(&dev->dev, &dev_attr_modalias); |
333 | if (result) | |
334 | goto end; | |
335 | } | |
29b71a1c | 336 | |
d1efe3c3 LO |
337 | /* |
338 | * If device has _STR, 'description' file is created | |
339 | */ | |
340 | status = acpi_get_handle(dev->handle, "_STR", &temp); | |
341 | if (ACPI_SUCCESS(status)) { | |
342 | status = acpi_evaluate_object(dev->handle, "_STR", | |
343 | NULL, &buffer); | |
344 | if (ACPI_FAILURE(status)) | |
345 | buffer.pointer = NULL; | |
346 | dev->pnp.str_obj = buffer.pointer; | |
347 | result = device_create_file(&dev->dev, &dev_attr_description); | |
348 | if (result) | |
349 | goto end; | |
350 | } | |
351 | ||
923d4a45 LZ |
352 | if (dev->flags.bus_address) |
353 | result = device_create_file(&dev->dev, &dev_attr_adr); | |
354 | if (dev->pnp.unique_id) | |
355 | result = device_create_file(&dev->dev, &dev_attr_uid); | |
356 | ||
bb74ac23 YI |
357 | status = acpi_evaluate_integer(dev->handle, "_SUN", NULL, &sun); |
358 | if (ACPI_SUCCESS(status)) { | |
359 | dev->pnp.sun = (unsigned long)sun; | |
360 | result = device_create_file(&dev->dev, &dev_attr_sun); | |
361 | if (result) | |
362 | goto end; | |
363 | } else { | |
364 | dev->pnp.sun = (unsigned long)-1; | |
365 | } | |
366 | ||
e49bd2dd ZR |
367 | /* |
368 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
369 | * hot-removal function from userland. | |
370 | */ | |
f883d9db PM |
371 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); |
372 | if (ACPI_SUCCESS(status)) | |
e49bd2dd | 373 | result = device_create_file(&dev->dev, &dev_attr_eject); |
0c526d96 | 374 | end: |
e49bd2dd | 375 | return result; |
1da177e4 LT |
376 | } |
377 | ||
f883d9db | 378 | static void acpi_device_remove_files(struct acpi_device *dev) |
1da177e4 | 379 | { |
f883d9db PM |
380 | acpi_status status; |
381 | acpi_handle temp; | |
1da177e4 | 382 | |
f883d9db | 383 | /* |
d1efe3c3 LO |
384 | * If device has _STR, remove 'description' file |
385 | */ | |
386 | status = acpi_get_handle(dev->handle, "_STR", &temp); | |
387 | if (ACPI_SUCCESS(status)) { | |
388 | kfree(dev->pnp.str_obj); | |
389 | device_remove_file(&dev->dev, &dev_attr_description); | |
390 | } | |
391 | /* | |
392 | * If device has _EJ0, remove 'eject' file. | |
f883d9db PM |
393 | */ |
394 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); | |
395 | if (ACPI_SUCCESS(status)) | |
396 | device_remove_file(&dev->dev, &dev_attr_eject); | |
1da177e4 | 397 | |
bb74ac23 YI |
398 | status = acpi_get_handle(dev->handle, "_SUN", &temp); |
399 | if (ACPI_SUCCESS(status)) | |
400 | device_remove_file(&dev->dev, &dev_attr_sun); | |
401 | ||
923d4a45 LZ |
402 | if (dev->pnp.unique_id) |
403 | device_remove_file(&dev->dev, &dev_attr_uid); | |
404 | if (dev->flags.bus_address) | |
405 | device_remove_file(&dev->dev, &dev_attr_adr); | |
1131b938 BH |
406 | device_remove_file(&dev->dev, &dev_attr_modalias); |
407 | device_remove_file(&dev->dev, &dev_attr_hid); | |
0c526d96 | 408 | if (dev->handle) |
e49bd2dd | 409 | device_remove_file(&dev->dev, &dev_attr_path); |
1da177e4 | 410 | } |
1da177e4 | 411 | /* -------------------------------------------------------------------------- |
9e89dde2 | 412 | ACPI Bus operations |
1da177e4 | 413 | -------------------------------------------------------------------------- */ |
29b71a1c | 414 | |
cf761af9 MW |
415 | static const struct acpi_device_id *__acpi_match_device( |
416 | struct acpi_device *device, const struct acpi_device_id *ids) | |
29b71a1c TR |
417 | { |
418 | const struct acpi_device_id *id; | |
7f47fa6c | 419 | struct acpi_hardware_id *hwid; |
29b71a1c | 420 | |
39a0ad87 ZY |
421 | /* |
422 | * If the device is not present, it is unnecessary to load device | |
423 | * driver for it. | |
424 | */ | |
425 | if (!device->status.present) | |
cf761af9 | 426 | return NULL; |
39a0ad87 | 427 | |
7f47fa6c BH |
428 | for (id = ids; id->id[0]; id++) |
429 | list_for_each_entry(hwid, &device->pnp.ids, list) | |
430 | if (!strcmp((char *) id->id, hwid->id)) | |
cf761af9 MW |
431 | return id; |
432 | ||
433 | return NULL; | |
434 | } | |
435 | ||
436 | /** | |
437 | * acpi_match_device - Match a struct device against a given list of ACPI IDs | |
438 | * @ids: Array of struct acpi_device_id object to match against. | |
439 | * @dev: The device structure to match. | |
440 | * | |
441 | * Check if @dev has a valid ACPI handle and if there is a struct acpi_device | |
442 | * object for that handle and use that object to match against a given list of | |
443 | * device IDs. | |
444 | * | |
445 | * Return a pointer to the first matching ID on success or %NULL on failure. | |
446 | */ | |
447 | const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids, | |
448 | const struct device *dev) | |
449 | { | |
450 | struct acpi_device *adev; | |
451 | ||
95f8a082 RW |
452 | if (!ids || !ACPI_HANDLE(dev) |
453 | || ACPI_FAILURE(acpi_bus_get_device(ACPI_HANDLE(dev), &adev))) | |
cf761af9 MW |
454 | return NULL; |
455 | ||
456 | return __acpi_match_device(adev, ids); | |
457 | } | |
458 | EXPORT_SYMBOL_GPL(acpi_match_device); | |
29b71a1c | 459 | |
cf761af9 MW |
460 | int acpi_match_device_ids(struct acpi_device *device, |
461 | const struct acpi_device_id *ids) | |
462 | { | |
463 | return __acpi_match_device(device, ids) ? 0 : -ENOENT; | |
29b71a1c TR |
464 | } |
465 | EXPORT_SYMBOL(acpi_match_device_ids); | |
466 | ||
82c7d5ef | 467 | void acpi_free_ids(struct acpi_device *device) |
7f47fa6c BH |
468 | { |
469 | struct acpi_hardware_id *id, *tmp; | |
470 | ||
471 | list_for_each_entry_safe(id, tmp, &device->pnp.ids, list) { | |
472 | kfree(id->id); | |
473 | kfree(id); | |
474 | } | |
d43e167d | 475 | kfree(device->pnp.unique_id); |
7f47fa6c BH |
476 | } |
477 | ||
0b224527 RW |
478 | static void acpi_free_power_resources_lists(struct acpi_device *device) |
479 | { | |
480 | int i; | |
481 | ||
993cbe59 RW |
482 | if (device->wakeup.flags.valid) |
483 | acpi_power_resources_list_free(&device->wakeup.resources); | |
484 | ||
0b224527 RW |
485 | if (!device->flags.power_manageable) |
486 | return; | |
487 | ||
488 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) { | |
489 | struct acpi_device_power_state *ps = &device->power.states[i]; | |
490 | acpi_power_resources_list_free(&ps->resources); | |
491 | } | |
492 | } | |
493 | ||
1890a97a | 494 | static void acpi_device_release(struct device *dev) |
1da177e4 | 495 | { |
1890a97a | 496 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 497 | |
7f47fa6c | 498 | acpi_free_ids(acpi_dev); |
0b224527 | 499 | acpi_free_power_resources_lists(acpi_dev); |
1890a97a | 500 | kfree(acpi_dev); |
1da177e4 LT |
501 | } |
502 | ||
5d9464a4 | 503 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 504 | { |
5d9464a4 PM |
505 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
506 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
1da177e4 | 507 | |
209d3b17 | 508 | return acpi_dev->flags.match_driver |
805d410f | 509 | && !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
5d9464a4 | 510 | } |
1da177e4 | 511 | |
7eff2e7a | 512 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 | 513 | { |
5d9464a4 | 514 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
7eff2e7a | 515 | int len; |
5d9464a4 | 516 | |
2b2ae7c7 TR |
517 | if (list_empty(&acpi_dev->pnp.ids)) |
518 | return 0; | |
519 | ||
7eff2e7a KS |
520 | if (add_uevent_var(env, "MODALIAS=")) |
521 | return -ENOMEM; | |
522 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], | |
523 | sizeof(env->buf) - env->buflen); | |
524 | if (len >= (sizeof(env->buf) - env->buflen)) | |
525 | return -ENOMEM; | |
526 | env->buflen += len; | |
9e89dde2 | 527 | return 0; |
1da177e4 LT |
528 | } |
529 | ||
46ec8598 BH |
530 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
531 | { | |
532 | struct acpi_device *device = data; | |
533 | ||
534 | device->driver->ops.notify(device, event); | |
535 | } | |
536 | ||
537 | static acpi_status acpi_device_notify_fixed(void *data) | |
538 | { | |
539 | struct acpi_device *device = data; | |
540 | ||
53de5356 BH |
541 | /* Fixed hardware devices have no handles */ |
542 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); | |
46ec8598 BH |
543 | return AE_OK; |
544 | } | |
545 | ||
546 | static int acpi_device_install_notify_handler(struct acpi_device *device) | |
547 | { | |
548 | acpi_status status; | |
46ec8598 | 549 | |
ccba2a36 | 550 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
551 | status = |
552 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
553 | acpi_device_notify_fixed, | |
554 | device); | |
ccba2a36 | 555 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
556 | status = |
557 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
558 | acpi_device_notify_fixed, | |
559 | device); | |
560 | else | |
561 | status = acpi_install_notify_handler(device->handle, | |
562 | ACPI_DEVICE_NOTIFY, | |
563 | acpi_device_notify, | |
564 | device); | |
565 | ||
566 | if (ACPI_FAILURE(status)) | |
567 | return -EINVAL; | |
568 | return 0; | |
569 | } | |
570 | ||
571 | static void acpi_device_remove_notify_handler(struct acpi_device *device) | |
572 | { | |
ccba2a36 | 573 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
574 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, |
575 | acpi_device_notify_fixed); | |
ccba2a36 | 576 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
577 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, |
578 | acpi_device_notify_fixed); | |
579 | else | |
580 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, | |
581 | acpi_device_notify); | |
582 | } | |
583 | ||
5d9464a4 | 584 | static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *); |
5d9464a4 | 585 | static int acpi_device_probe(struct device * dev) |
1da177e4 | 586 | { |
5d9464a4 PM |
587 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
588 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
589 | int ret; | |
590 | ||
591 | ret = acpi_bus_driver_init(acpi_dev, acpi_drv); | |
592 | if (!ret) { | |
46ec8598 BH |
593 | if (acpi_drv->ops.notify) { |
594 | ret = acpi_device_install_notify_handler(acpi_dev); | |
595 | if (ret) { | |
46ec8598 BH |
596 | if (acpi_drv->ops.remove) |
597 | acpi_drv->ops.remove(acpi_dev, | |
598 | acpi_dev->removal_type); | |
599 | return ret; | |
600 | } | |
601 | } | |
602 | ||
5d9464a4 PM |
603 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
604 | "Found driver [%s] for device [%s]\n", | |
605 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
606 | get_device(dev); | |
607 | } | |
608 | return ret; | |
609 | } | |
1da177e4 | 610 | |
5d9464a4 PM |
611 | static int acpi_device_remove(struct device * dev) |
612 | { | |
613 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
614 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
615 | ||
616 | if (acpi_drv) { | |
46ec8598 BH |
617 | if (acpi_drv->ops.notify) |
618 | acpi_device_remove_notify_handler(acpi_dev); | |
5d9464a4 | 619 | if (acpi_drv->ops.remove) |
96333578 | 620 | acpi_drv->ops.remove(acpi_dev, acpi_dev->removal_type); |
1da177e4 | 621 | } |
5d9464a4 | 622 | acpi_dev->driver = NULL; |
db89b4f0 | 623 | acpi_dev->driver_data = NULL; |
1da177e4 | 624 | |
5d9464a4 | 625 | put_device(dev); |
9e89dde2 ZR |
626 | return 0; |
627 | } | |
1da177e4 | 628 | |
55955aad | 629 | struct bus_type acpi_bus_type = { |
9e89dde2 | 630 | .name = "acpi", |
5d9464a4 PM |
631 | .match = acpi_bus_match, |
632 | .probe = acpi_device_probe, | |
633 | .remove = acpi_device_remove, | |
634 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
635 | }; |
636 | ||
82c7d5ef RW |
637 | int acpi_device_register(struct acpi_device *device, |
638 | void (*release)(struct device *)) | |
1da177e4 | 639 | { |
4be44fcd | 640 | int result; |
e49bd2dd ZR |
641 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
642 | int found = 0; | |
66b7ed40 | 643 | |
d43e167d RW |
644 | if (device->handle) { |
645 | acpi_status status; | |
646 | ||
647 | status = acpi_attach_data(device->handle, acpi_bus_data_handler, | |
648 | device); | |
649 | if (ACPI_FAILURE(status)) { | |
650 | acpi_handle_err(device->handle, | |
651 | "Unable to attach device data\n"); | |
652 | return -ENODEV; | |
653 | } | |
654 | } | |
655 | ||
9e89dde2 ZR |
656 | /* |
657 | * Linkage | |
658 | * ------- | |
659 | * Link this device to its parent and siblings. | |
660 | */ | |
661 | INIT_LIST_HEAD(&device->children); | |
662 | INIT_LIST_HEAD(&device->node); | |
9e89dde2 | 663 | INIT_LIST_HEAD(&device->wakeup_list); |
1033f904 LT |
664 | INIT_LIST_HEAD(&device->physical_node_list); |
665 | mutex_init(&device->physical_node_lock); | |
bc9b6407 | 666 | INIT_LIST_HEAD(&device->power_dependent); |
1da177e4 | 667 | |
e49bd2dd ZR |
668 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
669 | if (!new_bus_id) { | |
d43e167d RW |
670 | pr_err(PREFIX "Memory allocation error\n"); |
671 | result = -ENOMEM; | |
672 | goto err_detach; | |
1da177e4 | 673 | } |
e49bd2dd | 674 | |
9090589d | 675 | mutex_lock(&acpi_device_lock); |
e49bd2dd ZR |
676 | /* |
677 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
678 | * If failed, create one and link it into acpi_bus_id_list | |
679 | */ | |
680 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
1131b938 BH |
681 | if (!strcmp(acpi_device_bus_id->bus_id, |
682 | acpi_device_hid(device))) { | |
683 | acpi_device_bus_id->instance_no++; | |
e49bd2dd ZR |
684 | found = 1; |
685 | kfree(new_bus_id); | |
686 | break; | |
687 | } | |
1da177e4 | 688 | } |
0c526d96 | 689 | if (!found) { |
e49bd2dd | 690 | acpi_device_bus_id = new_bus_id; |
1131b938 | 691 | strcpy(acpi_device_bus_id->bus_id, acpi_device_hid(device)); |
e49bd2dd ZR |
692 | acpi_device_bus_id->instance_no = 0; |
693 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 694 | } |
0794469d | 695 | dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 696 | |
33b57150 | 697 | if (device->parent) |
9e89dde2 | 698 | list_add_tail(&device->node, &device->parent->children); |
33b57150 | 699 | |
9e89dde2 ZR |
700 | if (device->wakeup.flags.valid) |
701 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
9090589d | 702 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 703 | |
1890a97a | 704 | if (device->parent) |
66b7ed40 | 705 | device->dev.parent = &device->parent->dev; |
1890a97a | 706 | device->dev.bus = &acpi_bus_type; |
82c7d5ef | 707 | device->dev.release = release; |
8b12b922 | 708 | result = device_register(&device->dev); |
0c526d96 | 709 | if (result) { |
8b12b922 | 710 | dev_err(&device->dev, "Error registering device\n"); |
d43e167d | 711 | goto err; |
1da177e4 | 712 | } |
1da177e4 | 713 | |
e49bd2dd | 714 | result = acpi_device_setup_files(device); |
0c526d96 | 715 | if (result) |
0794469d KS |
716 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
717 | dev_name(&device->dev)); | |
1da177e4 | 718 | |
96333578 | 719 | device->removal_type = ACPI_BUS_REMOVAL_NORMAL; |
1da177e4 | 720 | return 0; |
d43e167d RW |
721 | |
722 | err: | |
9090589d | 723 | mutex_lock(&acpi_device_lock); |
33b57150 | 724 | if (device->parent) |
e49bd2dd | 725 | list_del(&device->node); |
e49bd2dd | 726 | list_del(&device->wakeup_list); |
9090589d | 727 | mutex_unlock(&acpi_device_lock); |
d43e167d RW |
728 | |
729 | err_detach: | |
730 | acpi_detach_data(device->handle, acpi_bus_data_handler); | |
e49bd2dd | 731 | return result; |
1da177e4 LT |
732 | } |
733 | ||
b17b537a | 734 | static void acpi_device_unregister(struct acpi_device *device) |
9e89dde2 | 735 | { |
9090589d | 736 | mutex_lock(&acpi_device_lock); |
33b57150 | 737 | if (device->parent) |
9e89dde2 | 738 | list_del(&device->node); |
1da177e4 | 739 | |
9e89dde2 | 740 | list_del(&device->wakeup_list); |
9090589d | 741 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 742 | |
9e89dde2 | 743 | acpi_detach_data(device->handle, acpi_bus_data_handler); |
1890a97a | 744 | |
bc9b6407 | 745 | acpi_power_add_remove_device(device, false); |
f883d9db | 746 | acpi_device_remove_files(device); |
1890a97a | 747 | device_unregister(&device->dev); |
bc9b6407 RW |
748 | /* |
749 | * Drop the reference counts of all power resources the device depends | |
750 | * on and turn off the ones that have no more references. | |
751 | */ | |
752 | acpi_power_transition(device, ACPI_STATE_D3_COLD); | |
1da177e4 LT |
753 | } |
754 | ||
9e89dde2 ZR |
755 | /* -------------------------------------------------------------------------- |
756 | Driver Management | |
757 | -------------------------------------------------------------------------- */ | |
1da177e4 | 758 | /** |
d758a8fa RD |
759 | * acpi_bus_driver_init - add a device to a driver |
760 | * @device: the device to add and initialize | |
761 | * @driver: driver for the device | |
762 | * | |
0c526d96 | 763 | * Used to initialize a device via its device driver. Called whenever a |
1890a97a | 764 | * driver is bound to a device. Invokes the driver's add() ops. |
1da177e4 LT |
765 | */ |
766 | static int | |
4be44fcd | 767 | acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) |
1da177e4 | 768 | { |
4be44fcd | 769 | int result = 0; |
1da177e4 | 770 | |
1da177e4 | 771 | if (!device || !driver) |
d550d98d | 772 | return -EINVAL; |
1da177e4 LT |
773 | |
774 | if (!driver->ops.add) | |
d550d98d | 775 | return -ENOSYS; |
1da177e4 LT |
776 | |
777 | result = driver->ops.add(device); | |
778 | if (result) { | |
779 | device->driver = NULL; | |
db89b4f0 | 780 | device->driver_data = NULL; |
d550d98d | 781 | return result; |
1da177e4 LT |
782 | } |
783 | ||
784 | device->driver = driver; | |
785 | ||
786 | /* | |
787 | * TBD - Configuration Management: Assign resources to device based | |
788 | * upon possible configuration and currently allocated resources. | |
789 | */ | |
790 | ||
4be44fcd LB |
791 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
792 | "Driver successfully bound to device\n")); | |
d550d98d | 793 | return 0; |
3fb02738 RS |
794 | } |
795 | ||
9e89dde2 ZR |
796 | /** |
797 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
798 | * @driver: driver being registered | |
799 | * | |
800 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
801 | * devices that match the driver's criteria and binds. Returns zero for | |
802 | * success or a negative error status for failure. | |
803 | */ | |
804 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
1da177e4 | 805 | { |
1890a97a | 806 | int ret; |
1da177e4 | 807 | |
9e89dde2 ZR |
808 | if (acpi_disabled) |
809 | return -ENODEV; | |
1890a97a PM |
810 | driver->drv.name = driver->name; |
811 | driver->drv.bus = &acpi_bus_type; | |
812 | driver->drv.owner = driver->owner; | |
1da177e4 | 813 | |
1890a97a PM |
814 | ret = driver_register(&driver->drv); |
815 | return ret; | |
9e89dde2 | 816 | } |
1da177e4 | 817 | |
9e89dde2 ZR |
818 | EXPORT_SYMBOL(acpi_bus_register_driver); |
819 | ||
820 | /** | |
821 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus | |
822 | * @driver: driver to unregister | |
823 | * | |
824 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
825 | * devices that match the driver's criteria and unbinds. | |
826 | */ | |
827 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
828 | { | |
1890a97a | 829 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
830 | } |
831 | ||
832 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
833 | ||
9e89dde2 ZR |
834 | /* -------------------------------------------------------------------------- |
835 | Device Enumeration | |
836 | -------------------------------------------------------------------------- */ | |
5c478f49 BH |
837 | static struct acpi_device *acpi_bus_get_parent(acpi_handle handle) |
838 | { | |
839 | acpi_status status; | |
840 | int ret; | |
841 | struct acpi_device *device; | |
842 | ||
843 | /* | |
844 | * Fixed hardware devices do not appear in the namespace and do not | |
845 | * have handles, but we fabricate acpi_devices for them, so we have | |
846 | * to deal with them specially. | |
847 | */ | |
848 | if (handle == NULL) | |
849 | return acpi_root; | |
850 | ||
851 | do { | |
852 | status = acpi_get_parent(handle, &handle); | |
853 | if (status == AE_NULL_ENTRY) | |
854 | return NULL; | |
855 | if (ACPI_FAILURE(status)) | |
856 | return acpi_root; | |
857 | ||
858 | ret = acpi_bus_get_device(handle, &device); | |
859 | if (ret == 0) | |
860 | return device; | |
861 | } while (1); | |
862 | } | |
863 | ||
9e89dde2 ZR |
864 | acpi_status |
865 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
866 | { | |
867 | acpi_status status; | |
868 | acpi_handle tmp; | |
869 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
870 | union acpi_object *obj; | |
871 | ||
872 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
873 | if (ACPI_FAILURE(status)) | |
874 | return status; | |
875 | ||
876 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
877 | if (ACPI_SUCCESS(status)) { | |
878 | obj = buffer.pointer; | |
3b5fee59 HM |
879 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
880 | ejd); | |
9e89dde2 ZR |
881 | kfree(buffer.pointer); |
882 | } | |
883 | return status; | |
884 | } | |
885 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
886 | ||
8e4319c4 | 887 | void acpi_bus_data_handler(acpi_handle handle, void *context) |
9e89dde2 ZR |
888 | { |
889 | ||
890 | /* TBD */ | |
891 | ||
892 | return; | |
893 | } | |
894 | ||
9e89dde2 | 895 | static acpi_status |
b581a7f9 RW |
896 | acpi_bus_extract_wakeup_device_power_package(acpi_handle handle, |
897 | struct acpi_device_wakeup *wakeup) | |
9e89dde2 | 898 | { |
b581a7f9 RW |
899 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
900 | union acpi_object *package = NULL; | |
9e89dde2 | 901 | union acpi_object *element = NULL; |
b581a7f9 | 902 | acpi_status status; |
9e89dde2 | 903 | |
b581a7f9 | 904 | if (!wakeup) |
9e89dde2 ZR |
905 | return AE_BAD_PARAMETER; |
906 | ||
993cbe59 RW |
907 | INIT_LIST_HEAD(&wakeup->resources); |
908 | ||
b581a7f9 RW |
909 | /* _PRW */ |
910 | status = acpi_evaluate_object(handle, "_PRW", NULL, &buffer); | |
911 | if (ACPI_FAILURE(status)) { | |
912 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
913 | return status; | |
914 | } | |
915 | ||
916 | package = (union acpi_object *)buffer.pointer; | |
917 | ||
918 | if (!package || (package->package.count < 2)) { | |
919 | status = AE_BAD_DATA; | |
920 | goto out; | |
921 | } | |
922 | ||
9e89dde2 | 923 | element = &(package->package.elements[0]); |
b581a7f9 RW |
924 | if (!element) { |
925 | status = AE_BAD_DATA; | |
926 | goto out; | |
927 | } | |
9e89dde2 ZR |
928 | if (element->type == ACPI_TYPE_PACKAGE) { |
929 | if ((element->package.count < 2) || | |
930 | (element->package.elements[0].type != | |
931 | ACPI_TYPE_LOCAL_REFERENCE) | |
b581a7f9 RW |
932 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) { |
933 | status = AE_BAD_DATA; | |
934 | goto out; | |
935 | } | |
936 | wakeup->gpe_device = | |
9e89dde2 | 937 | element->package.elements[0].reference.handle; |
b581a7f9 | 938 | wakeup->gpe_number = |
9e89dde2 ZR |
939 | (u32) element->package.elements[1].integer.value; |
940 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
b581a7f9 RW |
941 | wakeup->gpe_device = NULL; |
942 | wakeup->gpe_number = element->integer.value; | |
943 | } else { | |
944 | status = AE_BAD_DATA; | |
945 | goto out; | |
946 | } | |
9e89dde2 ZR |
947 | |
948 | element = &(package->package.elements[1]); | |
949 | if (element->type != ACPI_TYPE_INTEGER) { | |
b581a7f9 RW |
950 | status = AE_BAD_DATA; |
951 | goto out; | |
9e89dde2 | 952 | } |
b581a7f9 | 953 | wakeup->sleep_state = element->integer.value; |
9e89dde2 | 954 | |
ef85bdbe RW |
955 | status = acpi_extract_power_resources(package, 2, &wakeup->resources); |
956 | if (ACPI_FAILURE(status)) | |
957 | goto out; | |
9e89dde2 | 958 | |
bba63a29 | 959 | acpi_setup_gpe_for_wake(handle, wakeup->gpe_device, wakeup->gpe_number); |
9874647b | 960 | |
b581a7f9 RW |
961 | out: |
962 | kfree(buffer.pointer); | |
963 | ||
964 | return status; | |
1da177e4 LT |
965 | } |
966 | ||
f517709d | 967 | static void acpi_bus_set_run_wake_flags(struct acpi_device *device) |
1da177e4 | 968 | { |
29b71a1c | 969 | struct acpi_device_id button_device_ids[] = { |
29b71a1c | 970 | {"PNP0C0C", 0}, |
b7e38304 | 971 | {"PNP0C0D", 0}, |
29b71a1c TR |
972 | {"PNP0C0E", 0}, |
973 | {"", 0}, | |
974 | }; | |
f517709d RW |
975 | acpi_status status; |
976 | acpi_event_status event_status; | |
977 | ||
b67ea761 | 978 | device->wakeup.flags.notifier_present = 0; |
f517709d RW |
979 | |
980 | /* Power button, Lid switch always enable wakeup */ | |
981 | if (!acpi_match_device_ids(device, button_device_ids)) { | |
982 | device->wakeup.flags.run_wake = 1; | |
b7e38304 ZR |
983 | if (!acpi_match_device_ids(device, &button_device_ids[1])) { |
984 | /* Do not use Lid/sleep button for S5 wakeup */ | |
985 | if (device->wakeup.sleep_state == ACPI_STATE_S5) | |
986 | device->wakeup.sleep_state = ACPI_STATE_S4; | |
987 | } | |
f2b56bc8 | 988 | device_set_wakeup_capable(&device->dev, true); |
f517709d RW |
989 | return; |
990 | } | |
991 | ||
e8e18c95 RW |
992 | status = acpi_get_gpe_status(device->wakeup.gpe_device, |
993 | device->wakeup.gpe_number, | |
994 | &event_status); | |
f517709d RW |
995 | if (status == AE_OK) |
996 | device->wakeup.flags.run_wake = | |
997 | !!(event_status & ACPI_EVENT_FLAG_HANDLE); | |
998 | } | |
999 | ||
d57d09a4 | 1000 | static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
f517709d | 1001 | { |
d57d09a4 | 1002 | acpi_handle temp; |
f517709d | 1003 | acpi_status status = 0; |
f517709d | 1004 | int psw_error; |
29b71a1c | 1005 | |
d57d09a4 RW |
1006 | /* Presence of _PRW indicates wake capable */ |
1007 | status = acpi_get_handle(device->handle, "_PRW", &temp); | |
1008 | if (ACPI_FAILURE(status)) | |
1009 | return; | |
1010 | ||
b581a7f9 RW |
1011 | status = acpi_bus_extract_wakeup_device_power_package(device->handle, |
1012 | &device->wakeup); | |
9e89dde2 ZR |
1013 | if (ACPI_FAILURE(status)) { |
1014 | ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package")); | |
d57d09a4 | 1015 | return; |
9e89dde2 | 1016 | } |
1da177e4 | 1017 | |
9e89dde2 | 1018 | device->wakeup.flags.valid = 1; |
9b83ccd2 | 1019 | device->wakeup.prepare_count = 0; |
f517709d | 1020 | acpi_bus_set_run_wake_flags(device); |
729b2bdb ZY |
1021 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
1022 | * system for the ACPI device with the _PRW object. | |
1023 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. | |
1024 | * So it is necessary to call _DSW object first. Only when it is not | |
1025 | * present will the _PSW object used. | |
1026 | */ | |
77e76609 RW |
1027 | psw_error = acpi_device_sleep_wake(device, 0, 0, 0); |
1028 | if (psw_error) | |
1029 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
1030 | "error in _DSW or _PSW evaluation\n")); | |
1da177e4 | 1031 | } |
1da177e4 | 1032 | |
f33ce568 RW |
1033 | static void acpi_bus_init_power_state(struct acpi_device *device, int state) |
1034 | { | |
1035 | struct acpi_device_power_state *ps = &device->power.states[state]; | |
ef85bdbe RW |
1036 | char pathname[5] = { '_', 'P', 'R', '0' + state, '\0' }; |
1037 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
f33ce568 RW |
1038 | acpi_handle handle; |
1039 | acpi_status status; | |
1040 | ||
1041 | INIT_LIST_HEAD(&ps->resources); | |
1042 | ||
ef85bdbe RW |
1043 | /* Evaluate "_PRx" to get referenced power resources */ |
1044 | status = acpi_evaluate_object(device->handle, pathname, NULL, &buffer); | |
1045 | if (ACPI_SUCCESS(status)) { | |
1046 | union acpi_object *package = buffer.pointer; | |
1047 | ||
1048 | if (buffer.length && package | |
1049 | && package->type == ACPI_TYPE_PACKAGE | |
1050 | && package->package.count) { | |
1051 | status = acpi_extract_power_resources(package, 0, | |
1052 | &ps->resources); | |
1053 | if (ACPI_SUCCESS(status)) | |
1054 | device->power.flags.power_resources = 1; | |
f33ce568 | 1055 | } |
ef85bdbe | 1056 | ACPI_FREE(buffer.pointer); |
f33ce568 RW |
1057 | } |
1058 | ||
1059 | /* Evaluate "_PSx" to see if we can do explicit sets */ | |
ef85bdbe RW |
1060 | pathname[2] = 'S'; |
1061 | status = acpi_get_handle(device->handle, pathname, &handle); | |
f33ce568 RW |
1062 | if (ACPI_SUCCESS(status)) |
1063 | ps->flags.explicit_set = 1; | |
1064 | ||
1065 | /* | |
1066 | * State is valid if there are means to put the device into it. | |
1067 | * D3hot is only valid if _PR3 present. | |
1068 | */ | |
ef85bdbe | 1069 | if (!list_empty(&ps->resources) |
f33ce568 RW |
1070 | || (ps->flags.explicit_set && state < ACPI_STATE_D3_HOT)) { |
1071 | ps->flags.valid = 1; | |
1072 | ps->flags.os_accessible = 1; | |
1073 | } | |
1074 | ||
1075 | ps->power = -1; /* Unknown - driver assigned */ | |
1076 | ps->latency = -1; /* Unknown - driver assigned */ | |
1077 | } | |
1078 | ||
d43e167d | 1079 | static void acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 1080 | { |
8bc5053b RW |
1081 | acpi_status status; |
1082 | acpi_handle handle; | |
1083 | u32 i; | |
1a365616 | 1084 | |
d43e167d RW |
1085 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ |
1086 | status = acpi_get_handle(device->handle, "_PS0", &handle); | |
1087 | if (ACPI_FAILURE(status)) { | |
1088 | status = acpi_get_handle(device->handle, "_PR0", &handle); | |
1089 | if (ACPI_FAILURE(status)) | |
1090 | return; | |
1091 | } | |
1092 | ||
1093 | device->flags.power_manageable = 1; | |
4be44fcd | 1094 | |
9e89dde2 ZR |
1095 | /* |
1096 | * Power Management Flags | |
1097 | */ | |
1098 | status = acpi_get_handle(device->handle, "_PSC", &handle); | |
1099 | if (ACPI_SUCCESS(status)) | |
1100 | device->power.flags.explicit_get = 1; | |
1101 | status = acpi_get_handle(device->handle, "_IRC", &handle); | |
1102 | if (ACPI_SUCCESS(status)) | |
1103 | device->power.flags.inrush_current = 1; | |
1da177e4 | 1104 | |
9e89dde2 ZR |
1105 | /* |
1106 | * Enumerate supported power management states | |
1107 | */ | |
f33ce568 RW |
1108 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) |
1109 | acpi_bus_init_power_state(device, i); | |
1da177e4 | 1110 | |
0b224527 RW |
1111 | INIT_LIST_HEAD(&device->power.states[ACPI_STATE_D3_COLD].resources); |
1112 | ||
9e89dde2 ZR |
1113 | /* Set defaults for D0 and D3 states (always valid) */ |
1114 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
1115 | device->power.states[ACPI_STATE_D0].power = 100; | |
1116 | device->power.states[ACPI_STATE_D3].flags.valid = 1; | |
1117 | device->power.states[ACPI_STATE_D3].power = 0; | |
c8f7a62c | 1118 | |
5c7dd710 RW |
1119 | /* Set D3cold's explicit_set flag if _PS3 exists. */ |
1120 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set) | |
1121 | device->power.states[ACPI_STATE_D3_COLD].flags.explicit_set = 1; | |
1122 | ||
1399dfcd AL |
1123 | /* Presence of _PS3 or _PRx means we can put the device into D3 cold */ |
1124 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set || | |
1125 | device->power.flags.power_resources) | |
1126 | device->power.states[ACPI_STATE_D3_COLD].flags.os_accessible = 1; | |
1127 | ||
ade3e7fe | 1128 | acpi_bus_init_power(device); |
9e89dde2 | 1129 | } |
c8f7a62c | 1130 | |
d43e167d | 1131 | static void acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 1132 | { |
4be44fcd LB |
1133 | acpi_status status = AE_OK; |
1134 | acpi_handle temp = NULL; | |
1da177e4 | 1135 | |
1da177e4 LT |
1136 | /* Presence of _STA indicates 'dynamic_status' */ |
1137 | status = acpi_get_handle(device->handle, "_STA", &temp); | |
1138 | if (ACPI_SUCCESS(status)) | |
1139 | device->flags.dynamic_status = 1; | |
1140 | ||
1da177e4 LT |
1141 | /* Presence of _RMV indicates 'removable' */ |
1142 | status = acpi_get_handle(device->handle, "_RMV", &temp); | |
1143 | if (ACPI_SUCCESS(status)) | |
1144 | device->flags.removable = 1; | |
1145 | ||
1146 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
1147 | status = acpi_get_handle(device->handle, "_EJD", &temp); | |
1148 | if (ACPI_SUCCESS(status)) | |
1149 | device->flags.ejectable = 1; | |
1150 | else { | |
1151 | status = acpi_get_handle(device->handle, "_EJ0", &temp); | |
1152 | if (ACPI_SUCCESS(status)) | |
1153 | device->flags.ejectable = 1; | |
1154 | } | |
1da177e4 LT |
1155 | } |
1156 | ||
c7bcb4e9 | 1157 | static void acpi_device_get_busid(struct acpi_device *device) |
1da177e4 | 1158 | { |
4be44fcd LB |
1159 | char bus_id[5] = { '?', 0 }; |
1160 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
1161 | int i = 0; | |
1da177e4 LT |
1162 | |
1163 | /* | |
1164 | * Bus ID | |
1165 | * ------ | |
1166 | * The device's Bus ID is simply the object name. | |
1167 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
1168 | */ | |
859ac9a4 | 1169 | if (ACPI_IS_ROOT_DEVICE(device)) { |
1da177e4 | 1170 | strcpy(device->pnp.bus_id, "ACPI"); |
859ac9a4 BH |
1171 | return; |
1172 | } | |
1173 | ||
1174 | switch (device->device_type) { | |
1da177e4 LT |
1175 | case ACPI_BUS_TYPE_POWER_BUTTON: |
1176 | strcpy(device->pnp.bus_id, "PWRF"); | |
1177 | break; | |
1178 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
1179 | strcpy(device->pnp.bus_id, "SLPF"); | |
1180 | break; | |
1181 | default: | |
66b7ed40 | 1182 | acpi_get_name(device->handle, ACPI_SINGLE_NAME, &buffer); |
1da177e4 LT |
1183 | /* Clean up trailing underscores (if any) */ |
1184 | for (i = 3; i > 1; i--) { | |
1185 | if (bus_id[i] == '_') | |
1186 | bus_id[i] = '\0'; | |
1187 | else | |
1188 | break; | |
1189 | } | |
1190 | strcpy(device->pnp.bus_id, bus_id); | |
1191 | break; | |
1192 | } | |
1193 | } | |
1194 | ||
54735266 ZR |
1195 | /* |
1196 | * acpi_bay_match - see if a device is an ejectable driver bay | |
1197 | * | |
1198 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
1199 | * then we can safely call it an ejectable drive bay | |
1200 | */ | |
1201 | static int acpi_bay_match(struct acpi_device *device){ | |
1202 | acpi_status status; | |
1203 | acpi_handle handle; | |
1204 | acpi_handle tmp; | |
1205 | acpi_handle phandle; | |
1206 | ||
1207 | handle = device->handle; | |
1208 | ||
1209 | status = acpi_get_handle(handle, "_EJ0", &tmp); | |
1210 | if (ACPI_FAILURE(status)) | |
1211 | return -ENODEV; | |
1212 | ||
1213 | if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || | |
1214 | (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || | |
1215 | (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || | |
1216 | (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) | |
1217 | return 0; | |
1218 | ||
1219 | if (acpi_get_parent(handle, &phandle)) | |
1220 | return -ENODEV; | |
1221 | ||
1222 | if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) || | |
1223 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) || | |
1224 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) || | |
1225 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp)))) | |
1226 | return 0; | |
1227 | ||
1228 | return -ENODEV; | |
1229 | } | |
1230 | ||
3620f2f2 FS |
1231 | /* |
1232 | * acpi_dock_match - see if a device has a _DCK method | |
1233 | */ | |
1234 | static int acpi_dock_match(struct acpi_device *device) | |
1235 | { | |
1236 | acpi_handle tmp; | |
1237 | return acpi_get_handle(device->handle, "_DCK", &tmp); | |
1238 | } | |
1239 | ||
620e112c | 1240 | const char *acpi_device_hid(struct acpi_device *device) |
15b8dd53 | 1241 | { |
7f47fa6c | 1242 | struct acpi_hardware_id *hid; |
15b8dd53 | 1243 | |
2b2ae7c7 TR |
1244 | if (list_empty(&device->pnp.ids)) |
1245 | return dummy_hid; | |
1246 | ||
7f47fa6c BH |
1247 | hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list); |
1248 | return hid->id; | |
1249 | } | |
1250 | EXPORT_SYMBOL(acpi_device_hid); | |
15b8dd53 | 1251 | |
7f47fa6c BH |
1252 | static void acpi_add_id(struct acpi_device *device, const char *dev_id) |
1253 | { | |
1254 | struct acpi_hardware_id *id; | |
15b8dd53 | 1255 | |
7f47fa6c BH |
1256 | id = kmalloc(sizeof(*id), GFP_KERNEL); |
1257 | if (!id) | |
1258 | return; | |
15b8dd53 | 1259 | |
581de59e | 1260 | id->id = kstrdup(dev_id, GFP_KERNEL); |
7f47fa6c BH |
1261 | if (!id->id) { |
1262 | kfree(id); | |
1263 | return; | |
15b8dd53 BM |
1264 | } |
1265 | ||
7f47fa6c | 1266 | list_add_tail(&id->list, &device->pnp.ids); |
15b8dd53 BM |
1267 | } |
1268 | ||
222e82ac DW |
1269 | /* |
1270 | * Old IBM workstations have a DSDT bug wherein the SMBus object | |
1271 | * lacks the SMBUS01 HID and the methods do not have the necessary "_" | |
1272 | * prefix. Work around this. | |
1273 | */ | |
1274 | static int acpi_ibm_smbus_match(struct acpi_device *device) | |
1275 | { | |
1276 | acpi_handle h_dummy; | |
1277 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
1278 | int result; | |
1279 | ||
1280 | if (!dmi_name_in_vendors("IBM")) | |
1281 | return -ENODEV; | |
1282 | ||
1283 | /* Look for SMBS object */ | |
1284 | result = acpi_get_name(device->handle, ACPI_SINGLE_NAME, &path); | |
1285 | if (result) | |
1286 | return result; | |
1287 | ||
1288 | if (strcmp("SMBS", path.pointer)) { | |
1289 | result = -ENODEV; | |
1290 | goto out; | |
1291 | } | |
1292 | ||
1293 | /* Does it have the necessary (but misnamed) methods? */ | |
1294 | result = -ENODEV; | |
1295 | if (ACPI_SUCCESS(acpi_get_handle(device->handle, "SBI", &h_dummy)) && | |
1296 | ACPI_SUCCESS(acpi_get_handle(device->handle, "SBR", &h_dummy)) && | |
1297 | ACPI_SUCCESS(acpi_get_handle(device->handle, "SBW", &h_dummy))) | |
1298 | result = 0; | |
1299 | out: | |
1300 | kfree(path.pointer); | |
1301 | return result; | |
1302 | } | |
1303 | ||
c7bcb4e9 | 1304 | static void acpi_device_set_id(struct acpi_device *device) |
1da177e4 | 1305 | { |
4be44fcd | 1306 | acpi_status status; |
57f3674f | 1307 | struct acpi_device_info *info; |
78e25fef | 1308 | struct acpi_pnp_device_id_list *cid_list; |
7f47fa6c | 1309 | int i; |
1da177e4 | 1310 | |
c7bcb4e9 | 1311 | switch (device->device_type) { |
1da177e4 | 1312 | case ACPI_BUS_TYPE_DEVICE: |
859ac9a4 | 1313 | if (ACPI_IS_ROOT_DEVICE(device)) { |
57f3674f | 1314 | acpi_add_id(device, ACPI_SYSTEM_HID); |
859ac9a4 BH |
1315 | break; |
1316 | } | |
1317 | ||
66b7ed40 | 1318 | status = acpi_get_object_info(device->handle, &info); |
1da177e4 | 1319 | if (ACPI_FAILURE(status)) { |
96b2dd1f | 1320 | printk(KERN_ERR PREFIX "%s: Error reading device info\n", __func__); |
1da177e4 LT |
1321 | return; |
1322 | } | |
1323 | ||
1da177e4 | 1324 | if (info->valid & ACPI_VALID_HID) |
57f3674f BH |
1325 | acpi_add_id(device, info->hardware_id.string); |
1326 | if (info->valid & ACPI_VALID_CID) { | |
15b8dd53 | 1327 | cid_list = &info->compatible_id_list; |
57f3674f BH |
1328 | for (i = 0; i < cid_list->count; i++) |
1329 | acpi_add_id(device, cid_list->ids[i].string); | |
1330 | } | |
1da177e4 LT |
1331 | if (info->valid & ACPI_VALID_ADR) { |
1332 | device->pnp.bus_address = info->address; | |
1333 | device->flags.bus_address = 1; | |
1334 | } | |
ccf78040 LZ |
1335 | if (info->valid & ACPI_VALID_UID) |
1336 | device->pnp.unique_id = kstrdup(info->unique_id.string, | |
1337 | GFP_KERNEL); | |
ae843332 | 1338 | |
a83893ae BH |
1339 | kfree(info); |
1340 | ||
57f3674f BH |
1341 | /* |
1342 | * Some devices don't reliably have _HIDs & _CIDs, so add | |
1343 | * synthetic HIDs to make sure drivers can find them. | |
1344 | */ | |
c3d6de69 | 1345 | if (acpi_is_video_device(device)) |
57f3674f | 1346 | acpi_add_id(device, ACPI_VIDEO_HID); |
3620f2f2 | 1347 | else if (ACPI_SUCCESS(acpi_bay_match(device))) |
57f3674f | 1348 | acpi_add_id(device, ACPI_BAY_HID); |
3620f2f2 | 1349 | else if (ACPI_SUCCESS(acpi_dock_match(device))) |
57f3674f | 1350 | acpi_add_id(device, ACPI_DOCK_HID); |
222e82ac DW |
1351 | else if (!acpi_ibm_smbus_match(device)) |
1352 | acpi_add_id(device, ACPI_SMBUS_IBM_HID); | |
4f5f64cf | 1353 | else if (list_empty(&device->pnp.ids) && |
b7b30de5 BH |
1354 | ACPI_IS_ROOT_DEVICE(device->parent)) { |
1355 | acpi_add_id(device, ACPI_BUS_HID); /* \_SB, LNXSYBUS */ | |
1356 | strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME); | |
1357 | strcpy(device->pnp.device_class, ACPI_BUS_CLASS); | |
1358 | } | |
54735266 | 1359 | |
1da177e4 LT |
1360 | break; |
1361 | case ACPI_BUS_TYPE_POWER: | |
57f3674f | 1362 | acpi_add_id(device, ACPI_POWER_HID); |
1da177e4 LT |
1363 | break; |
1364 | case ACPI_BUS_TYPE_PROCESSOR: | |
57f3674f | 1365 | acpi_add_id(device, ACPI_PROCESSOR_OBJECT_HID); |
1da177e4 | 1366 | break; |
1da177e4 | 1367 | case ACPI_BUS_TYPE_THERMAL: |
57f3674f | 1368 | acpi_add_id(device, ACPI_THERMAL_HID); |
1da177e4 LT |
1369 | break; |
1370 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
57f3674f | 1371 | acpi_add_id(device, ACPI_BUTTON_HID_POWERF); |
1da177e4 LT |
1372 | break; |
1373 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
57f3674f | 1374 | acpi_add_id(device, ACPI_BUTTON_HID_SLEEPF); |
1da177e4 LT |
1375 | break; |
1376 | } | |
1da177e4 LT |
1377 | } |
1378 | ||
82c7d5ef RW |
1379 | void acpi_init_device_object(struct acpi_device *device, acpi_handle handle, |
1380 | int type, unsigned long long sta) | |
1da177e4 | 1381 | { |
d43e167d RW |
1382 | INIT_LIST_HEAD(&device->pnp.ids); |
1383 | device->device_type = type; | |
1384 | device->handle = handle; | |
1385 | device->parent = acpi_bus_get_parent(handle); | |
1386 | STRUCT_TO_INT(device->status) = sta; | |
1387 | acpi_device_get_busid(device); | |
1388 | acpi_device_set_id(device); | |
1389 | acpi_bus_get_flags(device); | |
1da177e4 LT |
1390 | } |
1391 | ||
5c478f49 BH |
1392 | static int acpi_add_single_object(struct acpi_device **child, |
1393 | acpi_handle handle, int type, | |
209d3b17 | 1394 | unsigned long long sta, bool match_driver) |
1da177e4 | 1395 | { |
77c24888 BH |
1396 | int result; |
1397 | struct acpi_device *device; | |
29aaefa6 | 1398 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 1399 | |
36bcbec7 | 1400 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 1401 | if (!device) { |
6468463a | 1402 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 1403 | return -ENOMEM; |
1da177e4 | 1404 | } |
1da177e4 | 1405 | |
d43e167d RW |
1406 | acpi_init_device_object(device, handle, type, sta); |
1407 | acpi_bus_get_power_flags(device); | |
d57d09a4 | 1408 | acpi_bus_get_wakeup_device_flags(device); |
1da177e4 | 1409 | |
209d3b17 | 1410 | device->flags.match_driver = match_driver; |
82c7d5ef | 1411 | result = acpi_device_register(device, acpi_device_release); |
d43e167d | 1412 | if (result) { |
718fb0de | 1413 | acpi_device_release(&device->dev); |
d43e167d RW |
1414 | return result; |
1415 | } | |
1da177e4 | 1416 | |
d43e167d RW |
1417 | acpi_power_add_remove_device(device, true); |
1418 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1419 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Added %s [%s] parent %s\n", | |
1420 | dev_name(&device->dev), (char *) buffer.pointer, | |
1421 | device->parent ? dev_name(&device->parent->dev) : "(null)")); | |
1422 | kfree(buffer.pointer); | |
1423 | *child = device; | |
1424 | return 0; | |
1da177e4 | 1425 | } |
1da177e4 | 1426 | |
778cbc1d BH |
1427 | static int acpi_bus_type_and_status(acpi_handle handle, int *type, |
1428 | unsigned long long *sta) | |
1da177e4 | 1429 | { |
778cbc1d BH |
1430 | acpi_status status; |
1431 | acpi_object_type acpi_type; | |
1da177e4 | 1432 | |
778cbc1d | 1433 | status = acpi_get_type(handle, &acpi_type); |
51a85faf | 1434 | if (ACPI_FAILURE(status)) |
778cbc1d | 1435 | return -ENODEV; |
4be44fcd | 1436 | |
778cbc1d | 1437 | switch (acpi_type) { |
51a85faf BH |
1438 | case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */ |
1439 | case ACPI_TYPE_DEVICE: | |
778cbc1d BH |
1440 | *type = ACPI_BUS_TYPE_DEVICE; |
1441 | status = acpi_bus_get_status_handle(handle, sta); | |
1442 | if (ACPI_FAILURE(status)) | |
1443 | return -ENODEV; | |
51a85faf BH |
1444 | break; |
1445 | case ACPI_TYPE_PROCESSOR: | |
778cbc1d BH |
1446 | *type = ACPI_BUS_TYPE_PROCESSOR; |
1447 | status = acpi_bus_get_status_handle(handle, sta); | |
1448 | if (ACPI_FAILURE(status)) | |
1449 | return -ENODEV; | |
51a85faf BH |
1450 | break; |
1451 | case ACPI_TYPE_THERMAL: | |
778cbc1d BH |
1452 | *type = ACPI_BUS_TYPE_THERMAL; |
1453 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1454 | break; |
1455 | case ACPI_TYPE_POWER: | |
778cbc1d BH |
1456 | *type = ACPI_BUS_TYPE_POWER; |
1457 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1458 | break; |
1459 | default: | |
778cbc1d | 1460 | return -ENODEV; |
51a85faf | 1461 | } |
1da177e4 | 1462 | |
778cbc1d BH |
1463 | return 0; |
1464 | } | |
1465 | ||
e3863094 RW |
1466 | static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used, |
1467 | void *not_used, void **return_value) | |
778cbc1d | 1468 | { |
805d410f | 1469 | struct acpi_device *device = NULL; |
778cbc1d BH |
1470 | int type; |
1471 | unsigned long long sta; | |
e3b87f8a | 1472 | acpi_status status; |
778cbc1d BH |
1473 | int result; |
1474 | ||
4002bf38 RW |
1475 | acpi_bus_get_device(handle, &device); |
1476 | if (device) | |
1477 | goto out; | |
1478 | ||
778cbc1d BH |
1479 | result = acpi_bus_type_and_status(handle, &type, &sta); |
1480 | if (result) | |
1481 | return AE_OK; | |
1482 | ||
82c7d5ef RW |
1483 | if (type == ACPI_BUS_TYPE_POWER) { |
1484 | acpi_add_power_resource(handle); | |
1485 | return AE_OK; | |
1486 | } | |
1487 | ||
778cbc1d | 1488 | if (!(sta & ACPI_STA_DEVICE_PRESENT) && |
b581a7f9 | 1489 | !(sta & ACPI_STA_DEVICE_FUNCTIONING)) { |
86e4e20e RW |
1490 | struct acpi_device_wakeup wakeup; |
1491 | acpi_handle temp; | |
1492 | ||
1493 | status = acpi_get_handle(handle, "_PRW", &temp); | |
993cbe59 | 1494 | if (ACPI_SUCCESS(status)) { |
86e4e20e RW |
1495 | acpi_bus_extract_wakeup_device_power_package(handle, |
1496 | &wakeup); | |
993cbe59 RW |
1497 | acpi_power_resources_list_free(&wakeup.resources); |
1498 | } | |
778cbc1d | 1499 | return AE_CTRL_DEPTH; |
b581a7f9 | 1500 | } |
778cbc1d | 1501 | |
82c7d5ef | 1502 | acpi_add_single_object(&device, handle, type, sta, false); |
e3b87f8a | 1503 | if (!device) |
51a85faf | 1504 | return AE_CTRL_DEPTH; |
1da177e4 | 1505 | |
209d3b17 | 1506 | device->flags.match_driver = true; |
1da177e4 | 1507 | |
4002bf38 | 1508 | out: |
51a85faf BH |
1509 | if (!*return_value) |
1510 | *return_value = device; | |
805d410f | 1511 | |
51a85faf BH |
1512 | return AE_OK; |
1513 | } | |
3fb02738 | 1514 | |
0fc300b0 RW |
1515 | static acpi_status acpi_bus_device_attach(acpi_handle handle, u32 lvl_not_used, |
1516 | void *not_used, void **ret_not_used) | |
805d410f | 1517 | { |
805d410f RW |
1518 | acpi_status status = AE_OK; |
1519 | struct acpi_device *device; | |
1520 | unsigned long long sta_not_used; | |
1521 | int type_not_used; | |
1522 | ||
1523 | /* | |
1524 | * Ignore errors ignored by acpi_bus_check_add() to avoid terminating | |
1525 | * namespace walks prematurely. | |
1526 | */ | |
1527 | if (acpi_bus_type_and_status(handle, &type_not_used, &sta_not_used)) | |
1528 | return AE_OK; | |
1529 | ||
1530 | if (acpi_bus_get_device(handle, &device)) | |
1531 | return AE_CTRL_DEPTH; | |
1532 | ||
0fc300b0 RW |
1533 | if (!acpi_match_device_ids(device, acpi_platform_device_ids)) { |
1534 | /* This is a known good platform device. */ | |
1535 | acpi_create_platform_device(device); | |
abe99210 | 1536 | } else if (device_attach(&device->dev) < 0) { |
0fc300b0 | 1537 | status = AE_CTRL_DEPTH; |
805d410f RW |
1538 | } |
1539 | return status; | |
1540 | } | |
1541 | ||
0cd6ac52 | 1542 | static int acpi_bus_scan(acpi_handle handle) |
51a85faf | 1543 | { |
51a85faf | 1544 | void *device = NULL; |
3fb02738 | 1545 | |
0cd6ac52 | 1546 | if (ACPI_SUCCESS(acpi_bus_check_add(handle, 0, NULL, &device))) |
51a85faf | 1547 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
e3863094 | 1548 | acpi_bus_check_add, NULL, NULL, &device); |
1da177e4 | 1549 | |
805d410f | 1550 | if (!device) |
7779688f | 1551 | return -ENODEV; |
805d410f | 1552 | |
0cd6ac52 | 1553 | if (ACPI_SUCCESS(acpi_bus_device_attach(handle, 0, NULL, NULL))) |
805d410f | 1554 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
0fc300b0 | 1555 | acpi_bus_device_attach, NULL, NULL, NULL); |
805d410f | 1556 | |
0cd6ac52 | 1557 | return 0; |
1da177e4 | 1558 | } |
1da177e4 | 1559 | |
636458de RW |
1560 | /** |
1561 | * acpi_bus_add - Add ACPI device node objects in a given namespace scope. | |
1562 | * @handle: Root of the namespace scope to scan. | |
7779688f | 1563 | * |
636458de RW |
1564 | * Scan a given ACPI tree (probably recently hot-plugged) and create and add |
1565 | * found devices. | |
7779688f | 1566 | * |
636458de RW |
1567 | * If no devices were found, -ENODEV is returned, but it does not mean that |
1568 | * there has been a real error. There just have been no suitable ACPI objects | |
1569 | * in the table trunk from which the kernel could create a device and add an | |
1570 | * appropriate driver. | |
7779688f | 1571 | */ |
0cd6ac52 | 1572 | int acpi_bus_add(acpi_handle handle) |
3fb02738 | 1573 | { |
02f57c67 | 1574 | int err; |
3fb02738 | 1575 | |
0cd6ac52 | 1576 | err = acpi_bus_scan(handle); |
02f57c67 RW |
1577 | if (err) |
1578 | return err; | |
3fb02738 | 1579 | |
3a37898d | 1580 | acpi_update_all_gpes(); |
0fc300b0 | 1581 | return 0; |
3fb02738 RS |
1582 | } |
1583 | EXPORT_SYMBOL(acpi_bus_add); | |
1584 | ||
05404d8f RW |
1585 | static acpi_status acpi_bus_device_detach(acpi_handle handle, u32 lvl_not_used, |
1586 | void *not_used, void **ret_not_used) | |
3fb02738 | 1587 | { |
05404d8f | 1588 | struct acpi_device *device = NULL; |
a2100801 | 1589 | |
05404d8f RW |
1590 | if (!acpi_bus_get_device(handle, &device)) { |
1591 | device->removal_type = ACPI_BUS_REMOVAL_EJECT; | |
1592 | device_release_driver(&device->dev); | |
1593 | } | |
1594 | return AE_OK; | |
3fb02738 | 1595 | } |
1da177e4 | 1596 | |
05404d8f RW |
1597 | static acpi_status acpi_bus_remove(acpi_handle handle, u32 lvl_not_used, |
1598 | void *not_used, void **ret_not_used) | |
1da177e4 | 1599 | { |
05404d8f | 1600 | struct acpi_device *device = NULL; |
1da177e4 | 1601 | |
05404d8f RW |
1602 | if (!acpi_bus_get_device(handle, &device)) |
1603 | acpi_device_unregister(device); | |
1da177e4 | 1604 | |
05404d8f RW |
1605 | return AE_OK; |
1606 | } | |
1da177e4 | 1607 | |
ae281795 | 1608 | int acpi_bus_trim(struct acpi_device *start) |
1da177e4 | 1609 | { |
05404d8f RW |
1610 | /* |
1611 | * Execute acpi_bus_device_detach() as a post-order callback to detach | |
1612 | * all ACPI drivers from the device nodes being removed. | |
1613 | */ | |
1614 | acpi_walk_namespace(ACPI_TYPE_ANY, start->handle, ACPI_UINT32_MAX, NULL, | |
1615 | acpi_bus_device_detach, NULL, NULL); | |
1616 | acpi_bus_device_detach(start->handle, 0, NULL, NULL); | |
cecdb193 RW |
1617 | /* |
1618 | * Execute acpi_bus_remove() as a post-order callback to remove device | |
1619 | * nodes in the given namespace scope. | |
1620 | */ | |
1621 | acpi_walk_namespace(ACPI_TYPE_ANY, start->handle, ACPI_UINT32_MAX, NULL, | |
1622 | acpi_bus_remove, NULL, NULL); | |
1623 | acpi_bus_remove(start->handle, 0, NULL, NULL); | |
1624 | return 0; | |
1da177e4 | 1625 | } |
ceaba663 KA |
1626 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
1627 | ||
e8b945c9 | 1628 | static int acpi_bus_scan_fixed(void) |
1da177e4 | 1629 | { |
4be44fcd LB |
1630 | int result = 0; |
1631 | struct acpi_device *device = NULL; | |
c4168bff | 1632 | |
1da177e4 LT |
1633 | /* |
1634 | * Enumerate all fixed-feature devices. | |
1635 | */ | |
cee324b1 | 1636 | if ((acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON) == 0) { |
5c478f49 | 1637 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1638 | ACPI_BUS_TYPE_POWER_BUTTON, |
209d3b17 | 1639 | ACPI_STA_DEFAULT, true); |
c10d7a13 | 1640 | device_init_wakeup(&device->dev, true); |
3fb02738 | 1641 | } |
1da177e4 | 1642 | |
cee324b1 | 1643 | if ((acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON) == 0) { |
5c478f49 | 1644 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1645 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
209d3b17 | 1646 | ACPI_STA_DEFAULT, true); |
3fb02738 | 1647 | } |
1da177e4 | 1648 | |
d550d98d | 1649 | return result; |
1da177e4 LT |
1650 | } |
1651 | ||
e747f274 | 1652 | int __init acpi_scan_init(void) |
1da177e4 LT |
1653 | { |
1654 | int result; | |
1da177e4 | 1655 | |
5b327265 PM |
1656 | result = bus_register(&acpi_bus_type); |
1657 | if (result) { | |
1658 | /* We don't want to quit even if we failed to add suspend/resume */ | |
1659 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
1660 | } | |
1661 | ||
92ef2a25 | 1662 | acpi_pci_root_init(); |
97d9a9e9 | 1663 | |
1da177e4 LT |
1664 | /* |
1665 | * Enumerate devices in the ACPI namespace. | |
1666 | */ | |
0cd6ac52 RW |
1667 | result = acpi_bus_scan(ACPI_ROOT_OBJECT); |
1668 | if (result) | |
1669 | return result; | |
c04209a7 | 1670 | |
0cd6ac52 | 1671 | result = acpi_bus_get_device(ACPI_ROOT_OBJECT, &acpi_root); |
c4168bff | 1672 | if (!result) |
adc08e20 | 1673 | result = acpi_bus_scan_fixed(); |
1da177e4 LT |
1674 | |
1675 | if (result) | |
b17b537a | 1676 | acpi_device_unregister(acpi_root); |
a2100801 | 1677 | else |
3a37898d | 1678 | acpi_update_all_gpes(); |
1da177e4 | 1679 | |
d550d98d | 1680 | return result; |
1da177e4 | 1681 | } |