]>
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 | |
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); |
c511cc19 | 55 | static DEFINE_MUTEX(acpi_scan_lock); |
9090589d | 56 | DEFINE_MUTEX(acpi_device_lock); |
1da177e4 LT |
57 | LIST_HEAD(acpi_wakeup_device_list); |
58 | ||
e49bd2dd | 59 | struct acpi_device_bus_id{ |
bb095854 | 60 | char bus_id[15]; |
e49bd2dd ZR |
61 | unsigned int instance_no; |
62 | struct list_head node; | |
1da177e4 | 63 | }; |
29b71a1c TR |
64 | |
65 | /* | |
66 | * Creates hid/cid(s) string needed for modalias and uevent | |
67 | * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: | |
68 | * char *modalias: "acpi:IBM0001:ACPI0001" | |
69 | */ | |
b3e572d2 AB |
70 | static int create_modalias(struct acpi_device *acpi_dev, char *modalias, |
71 | int size) | |
72 | { | |
29b71a1c | 73 | int len; |
5c9fcb5d | 74 | int count; |
7f47fa6c | 75 | struct acpi_hardware_id *id; |
29b71a1c | 76 | |
2b2ae7c7 TR |
77 | if (list_empty(&acpi_dev->pnp.ids)) |
78 | return 0; | |
79 | ||
5c9fcb5d | 80 | len = snprintf(modalias, size, "acpi:"); |
29b71a1c TR |
81 | size -= len; |
82 | ||
7f47fa6c BH |
83 | list_for_each_entry(id, &acpi_dev->pnp.ids, list) { |
84 | count = snprintf(&modalias[len], size, "%s:", id->id); | |
5c9fcb5d ZR |
85 | if (count < 0 || count >= size) |
86 | return -EINVAL; | |
87 | len += count; | |
88 | size -= count; | |
89 | } | |
90 | ||
29b71a1c TR |
91 | modalias[len] = '\0'; |
92 | return len; | |
93 | } | |
94 | ||
95 | static ssize_t | |
96 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
97 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
98 | int len; | |
99 | ||
100 | /* Device has no HID and no CID or string is >1024 */ | |
101 | len = create_modalias(acpi_dev, buf, 1024); | |
102 | if (len <= 0) | |
103 | return 0; | |
104 | buf[len++] = '\n'; | |
105 | return len; | |
106 | } | |
107 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); | |
108 | ||
c4753e57 TK |
109 | /** |
110 | * acpi_bus_hot_remove_device: hot-remove a device and its children | |
111 | * @context: struct acpi_eject_event pointer (freed in this func) | |
112 | * | |
113 | * Hot-remove a device and its children. This function frees up the | |
114 | * memory space passed by arg context, so that the caller may call | |
115 | * this function asynchronously through acpi_os_hotplug_execute(). | |
116 | */ | |
117 | void acpi_bus_hot_remove_device(void *context) | |
1da177e4 | 118 | { |
c4753e57 | 119 | struct acpi_eject_event *ej_event = (struct acpi_eject_event *) context; |
5993c467 YL |
120 | struct acpi_device *device = ej_event->device; |
121 | acpi_handle handle = device->handle; | |
b3c450c3 | 122 | acpi_handle temp; |
1da177e4 LT |
123 | struct acpi_object_list arg_list; |
124 | union acpi_object arg; | |
125 | acpi_status status = AE_OK; | |
c4753e57 | 126 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; /* default */ |
1da177e4 | 127 | |
26d46867 | 128 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
0794469d | 129 | "Hot-removing device %s...\n", dev_name(&device->dev))); |
26d46867 | 130 | |
bfee26db RW |
131 | acpi_bus_trim(device); |
132 | /* Device node has been released. */ | |
b3c450c3 TK |
133 | device = NULL; |
134 | ||
26d46867 ZR |
135 | /* power off device */ |
136 | status = acpi_evaluate_object(handle, "_PS3", NULL, NULL); | |
137 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) | |
55ac9a01 LM |
138 | printk(KERN_WARNING PREFIX |
139 | "Power-off device failed\n"); | |
26d46867 | 140 | |
b3c450c3 | 141 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_LCK", &temp))) { |
1da177e4 LT |
142 | arg_list.count = 1; |
143 | arg_list.pointer = &arg; | |
144 | arg.type = ACPI_TYPE_INTEGER; | |
145 | arg.integer.value = 0; | |
146 | acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); | |
147 | } | |
1da177e4 | 148 | |
1da177e4 LT |
149 | arg_list.count = 1; |
150 | arg_list.pointer = &arg; | |
151 | arg.type = ACPI_TYPE_INTEGER; | |
152 | arg.integer.value = 1; | |
1da177e4 | 153 | |
1da177e4 LT |
154 | /* |
155 | * TBD: _EJD support. | |
156 | */ | |
1da177e4 | 157 | status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); |
c4753e57 TK |
158 | if (ACPI_FAILURE(status)) { |
159 | if (status != AE_NOT_FOUND) | |
160 | printk(KERN_WARNING PREFIX | |
161 | "Eject device failed\n"); | |
162 | goto err_out; | |
163 | } | |
1da177e4 | 164 | |
c4753e57 TK |
165 | kfree(context); |
166 | return; | |
1da177e4 | 167 | |
c4753e57 TK |
168 | err_out: |
169 | /* Inform firmware the hot-remove operation has completed w/ error */ | |
170 | (void) acpi_evaluate_hotplug_ost(handle, | |
171 | ej_event->event, ost_code, NULL); | |
172 | kfree(context); | |
c8d72a5e | 173 | return; |
1da177e4 | 174 | } |
61622acc | 175 | EXPORT_SYMBOL(acpi_bus_hot_remove_device); |
1da177e4 | 176 | |
1da177e4 | 177 | static ssize_t |
f883d9db PM |
178 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
179 | const char *buf, size_t count) | |
1da177e4 | 180 | { |
4be44fcd | 181 | int ret = count; |
4be44fcd | 182 | acpi_status status; |
4be44fcd | 183 | acpi_object_type type = 0; |
f883d9db | 184 | struct acpi_device *acpi_device = to_acpi_device(d); |
c4753e57 | 185 | struct acpi_eject_event *ej_event; |
1da177e4 | 186 | |
1da177e4 LT |
187 | if ((!count) || (buf[0] != '1')) { |
188 | return -EINVAL; | |
189 | } | |
1da177e4 | 190 | #ifndef FORCE_EJECT |
f883d9db | 191 | if (acpi_device->driver == NULL) { |
1da177e4 LT |
192 | ret = -ENODEV; |
193 | goto err; | |
194 | } | |
195 | #endif | |
f883d9db PM |
196 | status = acpi_get_type(acpi_device->handle, &type); |
197 | if (ACPI_FAILURE(status) || (!acpi_device->flags.ejectable)) { | |
1da177e4 LT |
198 | ret = -ENODEV; |
199 | goto err; | |
200 | } | |
1da177e4 | 201 | |
c4753e57 TK |
202 | ej_event = kmalloc(sizeof(*ej_event), GFP_KERNEL); |
203 | if (!ej_event) { | |
204 | ret = -ENOMEM; | |
205 | goto err; | |
206 | } | |
207 | ||
5993c467 | 208 | ej_event->device = acpi_device; |
c4753e57 TK |
209 | if (acpi_device->flags.eject_pending) { |
210 | /* event originated from ACPI eject notification */ | |
211 | ej_event->event = ACPI_NOTIFY_EJECT_REQUEST; | |
212 | acpi_device->flags.eject_pending = 0; | |
213 | } else { | |
214 | /* event originated from user */ | |
215 | ej_event->event = ACPI_OST_EC_OSPM_EJECT; | |
5993c467 | 216 | (void) acpi_evaluate_hotplug_ost(acpi_device->handle, |
c4753e57 TK |
217 | ej_event->event, ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); |
218 | } | |
219 | ||
220 | acpi_os_hotplug_execute(acpi_bus_hot_remove_device, (void *)ej_event); | |
74523c90 | 221 | err: |
1da177e4 | 222 | return ret; |
1da177e4 LT |
223 | } |
224 | ||
f883d9db | 225 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
1da177e4 | 226 | |
e49bd2dd ZR |
227 | static ssize_t |
228 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
229 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1da177e4 | 230 | |
ea8d82fd | 231 | return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev)); |
1da177e4 | 232 | } |
e49bd2dd | 233 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
1da177e4 | 234 | |
923d4a45 LZ |
235 | static ssize_t acpi_device_uid_show(struct device *dev, |
236 | struct device_attribute *attr, char *buf) | |
237 | { | |
238 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
239 | ||
240 | return sprintf(buf, "%s\n", acpi_dev->pnp.unique_id); | |
241 | } | |
242 | static DEVICE_ATTR(uid, 0444, acpi_device_uid_show, NULL); | |
243 | ||
244 | static ssize_t acpi_device_adr_show(struct device *dev, | |
245 | struct device_attribute *attr, char *buf) | |
246 | { | |
247 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
248 | ||
249 | return sprintf(buf, "0x%08x\n", | |
250 | (unsigned int)(acpi_dev->pnp.bus_address)); | |
251 | } | |
252 | static DEVICE_ATTR(adr, 0444, acpi_device_adr_show, NULL); | |
253 | ||
e49bd2dd ZR |
254 | static ssize_t |
255 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
256 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
257 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
258 | int result; | |
1da177e4 | 259 | |
e49bd2dd | 260 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
0c526d96 | 261 | if (result) |
e49bd2dd | 262 | goto end; |
1da177e4 | 263 | |
e49bd2dd ZR |
264 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
265 | kfree(path.pointer); | |
0c526d96 | 266 | end: |
e49bd2dd | 267 | return result; |
1da177e4 | 268 | } |
e49bd2dd | 269 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
1da177e4 | 270 | |
d1efe3c3 LO |
271 | /* sysfs file that shows description text from the ACPI _STR method */ |
272 | static ssize_t description_show(struct device *dev, | |
273 | struct device_attribute *attr, | |
274 | char *buf) { | |
275 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
276 | int result; | |
277 | ||
278 | if (acpi_dev->pnp.str_obj == NULL) | |
279 | return 0; | |
280 | ||
281 | /* | |
282 | * The _STR object contains a Unicode identifier for a device. | |
283 | * We need to convert to utf-8 so it can be displayed. | |
284 | */ | |
285 | result = utf16s_to_utf8s( | |
286 | (wchar_t *)acpi_dev->pnp.str_obj->buffer.pointer, | |
287 | acpi_dev->pnp.str_obj->buffer.length, | |
288 | UTF16_LITTLE_ENDIAN, buf, | |
289 | PAGE_SIZE); | |
290 | ||
291 | buf[result++] = '\n'; | |
292 | ||
293 | return result; | |
294 | } | |
295 | static DEVICE_ATTR(description, 0444, description_show, NULL); | |
296 | ||
bb74ac23 YI |
297 | static ssize_t |
298 | acpi_device_sun_show(struct device *dev, struct device_attribute *attr, | |
299 | char *buf) { | |
300 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
301 | ||
302 | return sprintf(buf, "%lu\n", acpi_dev->pnp.sun); | |
303 | } | |
304 | static DEVICE_ATTR(sun, 0444, acpi_device_sun_show, NULL); | |
305 | ||
e49bd2dd | 306 | static int acpi_device_setup_files(struct acpi_device *dev) |
1da177e4 | 307 | { |
d1efe3c3 | 308 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
f883d9db PM |
309 | acpi_status status; |
310 | acpi_handle temp; | |
bb74ac23 | 311 | unsigned long long sun; |
e49bd2dd | 312 | int result = 0; |
1da177e4 LT |
313 | |
314 | /* | |
e49bd2dd | 315 | * Devices gotten from FADT don't have a "path" attribute |
1da177e4 | 316 | */ |
0c526d96 | 317 | if (dev->handle) { |
e49bd2dd | 318 | result = device_create_file(&dev->dev, &dev_attr_path); |
0c526d96 | 319 | if (result) |
e49bd2dd | 320 | goto end; |
1da177e4 LT |
321 | } |
322 | ||
2b2ae7c7 TR |
323 | if (!list_empty(&dev->pnp.ids)) { |
324 | result = device_create_file(&dev->dev, &dev_attr_hid); | |
325 | if (result) | |
326 | goto end; | |
1da177e4 | 327 | |
2b2ae7c7 TR |
328 | result = device_create_file(&dev->dev, &dev_attr_modalias); |
329 | if (result) | |
330 | goto end; | |
331 | } | |
29b71a1c | 332 | |
d1efe3c3 LO |
333 | /* |
334 | * If device has _STR, 'description' file is created | |
335 | */ | |
336 | status = acpi_get_handle(dev->handle, "_STR", &temp); | |
337 | if (ACPI_SUCCESS(status)) { | |
338 | status = acpi_evaluate_object(dev->handle, "_STR", | |
339 | NULL, &buffer); | |
340 | if (ACPI_FAILURE(status)) | |
341 | buffer.pointer = NULL; | |
342 | dev->pnp.str_obj = buffer.pointer; | |
343 | result = device_create_file(&dev->dev, &dev_attr_description); | |
344 | if (result) | |
345 | goto end; | |
346 | } | |
347 | ||
923d4a45 LZ |
348 | if (dev->flags.bus_address) |
349 | result = device_create_file(&dev->dev, &dev_attr_adr); | |
350 | if (dev->pnp.unique_id) | |
351 | result = device_create_file(&dev->dev, &dev_attr_uid); | |
352 | ||
bb74ac23 YI |
353 | status = acpi_evaluate_integer(dev->handle, "_SUN", NULL, &sun); |
354 | if (ACPI_SUCCESS(status)) { | |
355 | dev->pnp.sun = (unsigned long)sun; | |
356 | result = device_create_file(&dev->dev, &dev_attr_sun); | |
357 | if (result) | |
358 | goto end; | |
359 | } else { | |
360 | dev->pnp.sun = (unsigned long)-1; | |
361 | } | |
362 | ||
e49bd2dd ZR |
363 | /* |
364 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
365 | * hot-removal function from userland. | |
366 | */ | |
f883d9db PM |
367 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); |
368 | if (ACPI_SUCCESS(status)) | |
e49bd2dd | 369 | result = device_create_file(&dev->dev, &dev_attr_eject); |
0c526d96 | 370 | end: |
e49bd2dd | 371 | return result; |
1da177e4 LT |
372 | } |
373 | ||
f883d9db | 374 | static void acpi_device_remove_files(struct acpi_device *dev) |
1da177e4 | 375 | { |
f883d9db PM |
376 | acpi_status status; |
377 | acpi_handle temp; | |
1da177e4 | 378 | |
f883d9db | 379 | /* |
d1efe3c3 LO |
380 | * If device has _STR, remove 'description' file |
381 | */ | |
382 | status = acpi_get_handle(dev->handle, "_STR", &temp); | |
383 | if (ACPI_SUCCESS(status)) { | |
384 | kfree(dev->pnp.str_obj); | |
385 | device_remove_file(&dev->dev, &dev_attr_description); | |
386 | } | |
387 | /* | |
388 | * If device has _EJ0, remove 'eject' file. | |
f883d9db PM |
389 | */ |
390 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); | |
391 | if (ACPI_SUCCESS(status)) | |
392 | device_remove_file(&dev->dev, &dev_attr_eject); | |
1da177e4 | 393 | |
bb74ac23 YI |
394 | status = acpi_get_handle(dev->handle, "_SUN", &temp); |
395 | if (ACPI_SUCCESS(status)) | |
396 | device_remove_file(&dev->dev, &dev_attr_sun); | |
397 | ||
923d4a45 LZ |
398 | if (dev->pnp.unique_id) |
399 | device_remove_file(&dev->dev, &dev_attr_uid); | |
400 | if (dev->flags.bus_address) | |
401 | device_remove_file(&dev->dev, &dev_attr_adr); | |
1131b938 BH |
402 | device_remove_file(&dev->dev, &dev_attr_modalias); |
403 | device_remove_file(&dev->dev, &dev_attr_hid); | |
0c526d96 | 404 | if (dev->handle) |
e49bd2dd | 405 | device_remove_file(&dev->dev, &dev_attr_path); |
1da177e4 | 406 | } |
1da177e4 | 407 | /* -------------------------------------------------------------------------- |
9e89dde2 | 408 | ACPI Bus operations |
1da177e4 | 409 | -------------------------------------------------------------------------- */ |
29b71a1c | 410 | |
cf761af9 MW |
411 | static const struct acpi_device_id *__acpi_match_device( |
412 | struct acpi_device *device, const struct acpi_device_id *ids) | |
29b71a1c TR |
413 | { |
414 | const struct acpi_device_id *id; | |
7f47fa6c | 415 | struct acpi_hardware_id *hwid; |
29b71a1c | 416 | |
39a0ad87 ZY |
417 | /* |
418 | * If the device is not present, it is unnecessary to load device | |
419 | * driver for it. | |
420 | */ | |
421 | if (!device->status.present) | |
cf761af9 | 422 | return NULL; |
39a0ad87 | 423 | |
7f47fa6c BH |
424 | for (id = ids; id->id[0]; id++) |
425 | list_for_each_entry(hwid, &device->pnp.ids, list) | |
426 | if (!strcmp((char *) id->id, hwid->id)) | |
cf761af9 MW |
427 | return id; |
428 | ||
429 | return NULL; | |
430 | } | |
431 | ||
432 | /** | |
433 | * acpi_match_device - Match a struct device against a given list of ACPI IDs | |
434 | * @ids: Array of struct acpi_device_id object to match against. | |
435 | * @dev: The device structure to match. | |
436 | * | |
437 | * Check if @dev has a valid ACPI handle and if there is a struct acpi_device | |
438 | * object for that handle and use that object to match against a given list of | |
439 | * device IDs. | |
440 | * | |
441 | * Return a pointer to the first matching ID on success or %NULL on failure. | |
442 | */ | |
443 | const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids, | |
444 | const struct device *dev) | |
445 | { | |
446 | struct acpi_device *adev; | |
447 | ||
95f8a082 RW |
448 | if (!ids || !ACPI_HANDLE(dev) |
449 | || ACPI_FAILURE(acpi_bus_get_device(ACPI_HANDLE(dev), &adev))) | |
cf761af9 MW |
450 | return NULL; |
451 | ||
452 | return __acpi_match_device(adev, ids); | |
453 | } | |
454 | EXPORT_SYMBOL_GPL(acpi_match_device); | |
29b71a1c | 455 | |
cf761af9 MW |
456 | int acpi_match_device_ids(struct acpi_device *device, |
457 | const struct acpi_device_id *ids) | |
458 | { | |
459 | return __acpi_match_device(device, ids) ? 0 : -ENOENT; | |
29b71a1c TR |
460 | } |
461 | EXPORT_SYMBOL(acpi_match_device_ids); | |
462 | ||
7f47fa6c BH |
463 | static void acpi_free_ids(struct acpi_device *device) |
464 | { | |
465 | struct acpi_hardware_id *id, *tmp; | |
466 | ||
467 | list_for_each_entry_safe(id, tmp, &device->pnp.ids, list) { | |
468 | kfree(id->id); | |
469 | kfree(id); | |
470 | } | |
471 | } | |
472 | ||
1890a97a | 473 | static void acpi_device_release(struct device *dev) |
1da177e4 | 474 | { |
1890a97a | 475 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 476 | |
7f47fa6c | 477 | acpi_free_ids(acpi_dev); |
ccf78040 | 478 | kfree(acpi_dev->pnp.unique_id); |
1890a97a | 479 | kfree(acpi_dev); |
1da177e4 LT |
480 | } |
481 | ||
5d9464a4 | 482 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 483 | { |
5d9464a4 PM |
484 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
485 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
1da177e4 | 486 | |
209d3b17 | 487 | return acpi_dev->flags.match_driver |
805d410f | 488 | && !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
5d9464a4 | 489 | } |
1da177e4 | 490 | |
7eff2e7a | 491 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 | 492 | { |
5d9464a4 | 493 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
7eff2e7a | 494 | int len; |
5d9464a4 | 495 | |
2b2ae7c7 TR |
496 | if (list_empty(&acpi_dev->pnp.ids)) |
497 | return 0; | |
498 | ||
7eff2e7a KS |
499 | if (add_uevent_var(env, "MODALIAS=")) |
500 | return -ENOMEM; | |
501 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], | |
502 | sizeof(env->buf) - env->buflen); | |
503 | if (len >= (sizeof(env->buf) - env->buflen)) | |
504 | return -ENOMEM; | |
505 | env->buflen += len; | |
9e89dde2 | 506 | return 0; |
1da177e4 LT |
507 | } |
508 | ||
46ec8598 BH |
509 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
510 | { | |
511 | struct acpi_device *device = data; | |
512 | ||
513 | device->driver->ops.notify(device, event); | |
514 | } | |
515 | ||
516 | static acpi_status acpi_device_notify_fixed(void *data) | |
517 | { | |
518 | struct acpi_device *device = data; | |
519 | ||
53de5356 BH |
520 | /* Fixed hardware devices have no handles */ |
521 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); | |
46ec8598 BH |
522 | return AE_OK; |
523 | } | |
524 | ||
525 | static int acpi_device_install_notify_handler(struct acpi_device *device) | |
526 | { | |
527 | acpi_status status; | |
46ec8598 | 528 | |
ccba2a36 | 529 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
530 | status = |
531 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
532 | acpi_device_notify_fixed, | |
533 | device); | |
ccba2a36 | 534 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
535 | status = |
536 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
537 | acpi_device_notify_fixed, | |
538 | device); | |
539 | else | |
540 | status = acpi_install_notify_handler(device->handle, | |
541 | ACPI_DEVICE_NOTIFY, | |
542 | acpi_device_notify, | |
543 | device); | |
544 | ||
545 | if (ACPI_FAILURE(status)) | |
546 | return -EINVAL; | |
547 | return 0; | |
548 | } | |
549 | ||
550 | static void acpi_device_remove_notify_handler(struct acpi_device *device) | |
551 | { | |
ccba2a36 | 552 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
553 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, |
554 | acpi_device_notify_fixed); | |
ccba2a36 | 555 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
556 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, |
557 | acpi_device_notify_fixed); | |
558 | else | |
559 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, | |
560 | acpi_device_notify); | |
561 | } | |
562 | ||
5d9464a4 | 563 | static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *); |
5d9464a4 | 564 | static int acpi_device_probe(struct device * dev) |
1da177e4 | 565 | { |
5d9464a4 PM |
566 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
567 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
568 | int ret; | |
569 | ||
570 | ret = acpi_bus_driver_init(acpi_dev, acpi_drv); | |
571 | if (!ret) { | |
46ec8598 BH |
572 | if (acpi_drv->ops.notify) { |
573 | ret = acpi_device_install_notify_handler(acpi_dev); | |
574 | if (ret) { | |
46ec8598 BH |
575 | if (acpi_drv->ops.remove) |
576 | acpi_drv->ops.remove(acpi_dev, | |
577 | acpi_dev->removal_type); | |
578 | return ret; | |
579 | } | |
580 | } | |
581 | ||
5d9464a4 PM |
582 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
583 | "Found driver [%s] for device [%s]\n", | |
584 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
585 | get_device(dev); | |
586 | } | |
587 | return ret; | |
588 | } | |
1da177e4 | 589 | |
5d9464a4 PM |
590 | static int acpi_device_remove(struct device * dev) |
591 | { | |
592 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
593 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
594 | ||
595 | if (acpi_drv) { | |
46ec8598 BH |
596 | if (acpi_drv->ops.notify) |
597 | acpi_device_remove_notify_handler(acpi_dev); | |
5d9464a4 | 598 | if (acpi_drv->ops.remove) |
96333578 | 599 | acpi_drv->ops.remove(acpi_dev, acpi_dev->removal_type); |
1da177e4 | 600 | } |
5d9464a4 | 601 | acpi_dev->driver = NULL; |
db89b4f0 | 602 | acpi_dev->driver_data = NULL; |
1da177e4 | 603 | |
5d9464a4 | 604 | put_device(dev); |
9e89dde2 ZR |
605 | return 0; |
606 | } | |
1da177e4 | 607 | |
55955aad | 608 | struct bus_type acpi_bus_type = { |
9e89dde2 | 609 | .name = "acpi", |
5d9464a4 PM |
610 | .match = acpi_bus_match, |
611 | .probe = acpi_device_probe, | |
612 | .remove = acpi_device_remove, | |
613 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
614 | }; |
615 | ||
66b7ed40 | 616 | static int acpi_device_register(struct acpi_device *device) |
1da177e4 | 617 | { |
4be44fcd | 618 | int result; |
e49bd2dd ZR |
619 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
620 | int found = 0; | |
66b7ed40 | 621 | |
9e89dde2 ZR |
622 | /* |
623 | * Linkage | |
624 | * ------- | |
625 | * Link this device to its parent and siblings. | |
626 | */ | |
627 | INIT_LIST_HEAD(&device->children); | |
628 | INIT_LIST_HEAD(&device->node); | |
9e89dde2 | 629 | INIT_LIST_HEAD(&device->wakeup_list); |
1033f904 LT |
630 | INIT_LIST_HEAD(&device->physical_node_list); |
631 | mutex_init(&device->physical_node_lock); | |
1da177e4 | 632 | |
e49bd2dd ZR |
633 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
634 | if (!new_bus_id) { | |
635 | printk(KERN_ERR PREFIX "Memory allocation error\n"); | |
636 | return -ENOMEM; | |
1da177e4 | 637 | } |
e49bd2dd | 638 | |
9090589d | 639 | mutex_lock(&acpi_device_lock); |
e49bd2dd ZR |
640 | /* |
641 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
642 | * If failed, create one and link it into acpi_bus_id_list | |
643 | */ | |
644 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
1131b938 BH |
645 | if (!strcmp(acpi_device_bus_id->bus_id, |
646 | acpi_device_hid(device))) { | |
647 | acpi_device_bus_id->instance_no++; | |
e49bd2dd ZR |
648 | found = 1; |
649 | kfree(new_bus_id); | |
650 | break; | |
651 | } | |
1da177e4 | 652 | } |
0c526d96 | 653 | if (!found) { |
e49bd2dd | 654 | acpi_device_bus_id = new_bus_id; |
1131b938 | 655 | strcpy(acpi_device_bus_id->bus_id, acpi_device_hid(device)); |
e49bd2dd ZR |
656 | acpi_device_bus_id->instance_no = 0; |
657 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 658 | } |
0794469d | 659 | dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 660 | |
33b57150 | 661 | if (device->parent) |
9e89dde2 | 662 | list_add_tail(&device->node, &device->parent->children); |
33b57150 | 663 | |
9e89dde2 ZR |
664 | if (device->wakeup.flags.valid) |
665 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
9090589d | 666 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 667 | |
1890a97a | 668 | if (device->parent) |
66b7ed40 | 669 | device->dev.parent = &device->parent->dev; |
1890a97a | 670 | device->dev.bus = &acpi_bus_type; |
1890a97a | 671 | device->dev.release = &acpi_device_release; |
8b12b922 | 672 | result = device_register(&device->dev); |
0c526d96 | 673 | if (result) { |
8b12b922 | 674 | dev_err(&device->dev, "Error registering device\n"); |
e49bd2dd | 675 | goto end; |
1da177e4 | 676 | } |
1da177e4 | 677 | |
e49bd2dd | 678 | result = acpi_device_setup_files(device); |
0c526d96 | 679 | if (result) |
0794469d KS |
680 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
681 | dev_name(&device->dev)); | |
1da177e4 | 682 | |
96333578 | 683 | device->removal_type = ACPI_BUS_REMOVAL_NORMAL; |
1da177e4 | 684 | return 0; |
0c526d96 | 685 | end: |
9090589d | 686 | mutex_lock(&acpi_device_lock); |
33b57150 | 687 | if (device->parent) |
e49bd2dd | 688 | list_del(&device->node); |
e49bd2dd | 689 | list_del(&device->wakeup_list); |
9090589d | 690 | mutex_unlock(&acpi_device_lock); |
e49bd2dd | 691 | return result; |
1da177e4 LT |
692 | } |
693 | ||
b17b537a | 694 | static void acpi_device_unregister(struct acpi_device *device) |
9e89dde2 | 695 | { |
9090589d | 696 | mutex_lock(&acpi_device_lock); |
33b57150 | 697 | if (device->parent) |
9e89dde2 | 698 | list_del(&device->node); |
1da177e4 | 699 | |
9e89dde2 | 700 | list_del(&device->wakeup_list); |
9090589d | 701 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 702 | |
9e89dde2 | 703 | acpi_detach_data(device->handle, acpi_bus_data_handler); |
1890a97a | 704 | |
f883d9db | 705 | acpi_device_remove_files(device); |
1890a97a | 706 | device_unregister(&device->dev); |
1da177e4 LT |
707 | } |
708 | ||
9e89dde2 ZR |
709 | /* -------------------------------------------------------------------------- |
710 | Driver Management | |
711 | -------------------------------------------------------------------------- */ | |
1da177e4 | 712 | /** |
d758a8fa RD |
713 | * acpi_bus_driver_init - add a device to a driver |
714 | * @device: the device to add and initialize | |
715 | * @driver: driver for the device | |
716 | * | |
0c526d96 | 717 | * Used to initialize a device via its device driver. Called whenever a |
1890a97a | 718 | * driver is bound to a device. Invokes the driver's add() ops. |
1da177e4 LT |
719 | */ |
720 | static int | |
4be44fcd | 721 | acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) |
1da177e4 | 722 | { |
4be44fcd | 723 | int result = 0; |
1da177e4 | 724 | |
1da177e4 | 725 | if (!device || !driver) |
d550d98d | 726 | return -EINVAL; |
1da177e4 LT |
727 | |
728 | if (!driver->ops.add) | |
d550d98d | 729 | return -ENOSYS; |
1da177e4 LT |
730 | |
731 | result = driver->ops.add(device); | |
732 | if (result) { | |
733 | device->driver = NULL; | |
db89b4f0 | 734 | device->driver_data = NULL; |
d550d98d | 735 | return result; |
1da177e4 LT |
736 | } |
737 | ||
738 | device->driver = driver; | |
739 | ||
740 | /* | |
741 | * TBD - Configuration Management: Assign resources to device based | |
742 | * upon possible configuration and currently allocated resources. | |
743 | */ | |
744 | ||
4be44fcd LB |
745 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
746 | "Driver successfully bound to device\n")); | |
d550d98d | 747 | return 0; |
3fb02738 RS |
748 | } |
749 | ||
9e89dde2 ZR |
750 | /** |
751 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
752 | * @driver: driver being registered | |
753 | * | |
754 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
755 | * devices that match the driver's criteria and binds. Returns zero for | |
756 | * success or a negative error status for failure. | |
757 | */ | |
758 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
1da177e4 | 759 | { |
1890a97a | 760 | int ret; |
1da177e4 | 761 | |
9e89dde2 ZR |
762 | if (acpi_disabled) |
763 | return -ENODEV; | |
1890a97a PM |
764 | driver->drv.name = driver->name; |
765 | driver->drv.bus = &acpi_bus_type; | |
766 | driver->drv.owner = driver->owner; | |
1da177e4 | 767 | |
1890a97a PM |
768 | ret = driver_register(&driver->drv); |
769 | return ret; | |
9e89dde2 | 770 | } |
1da177e4 | 771 | |
9e89dde2 ZR |
772 | EXPORT_SYMBOL(acpi_bus_register_driver); |
773 | ||
774 | /** | |
775 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus | |
776 | * @driver: driver to unregister | |
777 | * | |
778 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
779 | * devices that match the driver's criteria and unbinds. | |
780 | */ | |
781 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
782 | { | |
1890a97a | 783 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
784 | } |
785 | ||
786 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
787 | ||
9e89dde2 ZR |
788 | /* -------------------------------------------------------------------------- |
789 | Device Enumeration | |
790 | -------------------------------------------------------------------------- */ | |
5c478f49 BH |
791 | static struct acpi_device *acpi_bus_get_parent(acpi_handle handle) |
792 | { | |
793 | acpi_status status; | |
794 | int ret; | |
795 | struct acpi_device *device; | |
796 | ||
797 | /* | |
798 | * Fixed hardware devices do not appear in the namespace and do not | |
799 | * have handles, but we fabricate acpi_devices for them, so we have | |
800 | * to deal with them specially. | |
801 | */ | |
802 | if (handle == NULL) | |
803 | return acpi_root; | |
804 | ||
805 | do { | |
806 | status = acpi_get_parent(handle, &handle); | |
807 | if (status == AE_NULL_ENTRY) | |
808 | return NULL; | |
809 | if (ACPI_FAILURE(status)) | |
810 | return acpi_root; | |
811 | ||
812 | ret = acpi_bus_get_device(handle, &device); | |
813 | if (ret == 0) | |
814 | return device; | |
815 | } while (1); | |
816 | } | |
817 | ||
9e89dde2 ZR |
818 | acpi_status |
819 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
820 | { | |
821 | acpi_status status; | |
822 | acpi_handle tmp; | |
823 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
824 | union acpi_object *obj; | |
825 | ||
826 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
827 | if (ACPI_FAILURE(status)) | |
828 | return status; | |
829 | ||
830 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
831 | if (ACPI_SUCCESS(status)) { | |
832 | obj = buffer.pointer; | |
3b5fee59 HM |
833 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
834 | ejd); | |
9e89dde2 ZR |
835 | kfree(buffer.pointer); |
836 | } | |
837 | return status; | |
838 | } | |
839 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
840 | ||
8e4319c4 | 841 | void acpi_bus_data_handler(acpi_handle handle, void *context) |
9e89dde2 ZR |
842 | { |
843 | ||
844 | /* TBD */ | |
845 | ||
846 | return; | |
847 | } | |
848 | ||
9e89dde2 ZR |
849 | static int acpi_bus_get_perf_flags(struct acpi_device *device) |
850 | { | |
851 | device->performance.state = ACPI_STATE_UNKNOWN; | |
852 | return 0; | |
853 | } | |
854 | ||
855 | static acpi_status | |
b581a7f9 RW |
856 | acpi_bus_extract_wakeup_device_power_package(acpi_handle handle, |
857 | struct acpi_device_wakeup *wakeup) | |
9e89dde2 | 858 | { |
b581a7f9 RW |
859 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
860 | union acpi_object *package = NULL; | |
9e89dde2 | 861 | union acpi_object *element = NULL; |
b581a7f9 RW |
862 | acpi_status status; |
863 | int i = 0; | |
9e89dde2 | 864 | |
b581a7f9 | 865 | if (!wakeup) |
9e89dde2 ZR |
866 | return AE_BAD_PARAMETER; |
867 | ||
b581a7f9 RW |
868 | /* _PRW */ |
869 | status = acpi_evaluate_object(handle, "_PRW", NULL, &buffer); | |
870 | if (ACPI_FAILURE(status)) { | |
871 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
872 | return status; | |
873 | } | |
874 | ||
875 | package = (union acpi_object *)buffer.pointer; | |
876 | ||
877 | if (!package || (package->package.count < 2)) { | |
878 | status = AE_BAD_DATA; | |
879 | goto out; | |
880 | } | |
881 | ||
9e89dde2 | 882 | element = &(package->package.elements[0]); |
b581a7f9 RW |
883 | if (!element) { |
884 | status = AE_BAD_DATA; | |
885 | goto out; | |
886 | } | |
9e89dde2 ZR |
887 | if (element->type == ACPI_TYPE_PACKAGE) { |
888 | if ((element->package.count < 2) || | |
889 | (element->package.elements[0].type != | |
890 | ACPI_TYPE_LOCAL_REFERENCE) | |
b581a7f9 RW |
891 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) { |
892 | status = AE_BAD_DATA; | |
893 | goto out; | |
894 | } | |
895 | wakeup->gpe_device = | |
9e89dde2 | 896 | element->package.elements[0].reference.handle; |
b581a7f9 | 897 | wakeup->gpe_number = |
9e89dde2 ZR |
898 | (u32) element->package.elements[1].integer.value; |
899 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
b581a7f9 RW |
900 | wakeup->gpe_device = NULL; |
901 | wakeup->gpe_number = element->integer.value; | |
902 | } else { | |
903 | status = AE_BAD_DATA; | |
904 | goto out; | |
905 | } | |
9e89dde2 ZR |
906 | |
907 | element = &(package->package.elements[1]); | |
908 | if (element->type != ACPI_TYPE_INTEGER) { | |
b581a7f9 RW |
909 | status = AE_BAD_DATA; |
910 | goto out; | |
9e89dde2 | 911 | } |
b581a7f9 | 912 | wakeup->sleep_state = element->integer.value; |
9e89dde2 ZR |
913 | |
914 | if ((package->package.count - 2) > ACPI_MAX_HANDLES) { | |
b581a7f9 RW |
915 | status = AE_NO_MEMORY; |
916 | goto out; | |
9e89dde2 | 917 | } |
b581a7f9 RW |
918 | wakeup->resources.count = package->package.count - 2; |
919 | for (i = 0; i < wakeup->resources.count; i++) { | |
9e89dde2 | 920 | element = &(package->package.elements[i + 2]); |
b581a7f9 RW |
921 | if (element->type != ACPI_TYPE_LOCAL_REFERENCE) { |
922 | status = AE_BAD_DATA; | |
923 | goto out; | |
924 | } | |
9e89dde2 | 925 | |
b581a7f9 | 926 | wakeup->resources.handles[i] = element->reference.handle; |
1da177e4 | 927 | } |
9e89dde2 | 928 | |
bba63a29 | 929 | acpi_setup_gpe_for_wake(handle, wakeup->gpe_device, wakeup->gpe_number); |
9874647b | 930 | |
b581a7f9 RW |
931 | out: |
932 | kfree(buffer.pointer); | |
933 | ||
934 | return status; | |
1da177e4 LT |
935 | } |
936 | ||
f517709d | 937 | static void acpi_bus_set_run_wake_flags(struct acpi_device *device) |
1da177e4 | 938 | { |
29b71a1c | 939 | struct acpi_device_id button_device_ids[] = { |
29b71a1c | 940 | {"PNP0C0C", 0}, |
b7e38304 | 941 | {"PNP0C0D", 0}, |
29b71a1c TR |
942 | {"PNP0C0E", 0}, |
943 | {"", 0}, | |
944 | }; | |
f517709d RW |
945 | acpi_status status; |
946 | acpi_event_status event_status; | |
947 | ||
b67ea761 | 948 | device->wakeup.flags.notifier_present = 0; |
f517709d RW |
949 | |
950 | /* Power button, Lid switch always enable wakeup */ | |
951 | if (!acpi_match_device_ids(device, button_device_ids)) { | |
952 | device->wakeup.flags.run_wake = 1; | |
b7e38304 ZR |
953 | if (!acpi_match_device_ids(device, &button_device_ids[1])) { |
954 | /* Do not use Lid/sleep button for S5 wakeup */ | |
955 | if (device->wakeup.sleep_state == ACPI_STATE_S5) | |
956 | device->wakeup.sleep_state = ACPI_STATE_S4; | |
957 | } | |
f2b56bc8 | 958 | device_set_wakeup_capable(&device->dev, true); |
f517709d RW |
959 | return; |
960 | } | |
961 | ||
e8e18c95 RW |
962 | status = acpi_get_gpe_status(device->wakeup.gpe_device, |
963 | device->wakeup.gpe_number, | |
964 | &event_status); | |
f517709d RW |
965 | if (status == AE_OK) |
966 | device->wakeup.flags.run_wake = | |
967 | !!(event_status & ACPI_EVENT_FLAG_HANDLE); | |
968 | } | |
969 | ||
d57d09a4 | 970 | static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
f517709d | 971 | { |
d57d09a4 | 972 | acpi_handle temp; |
f517709d | 973 | acpi_status status = 0; |
f517709d | 974 | int psw_error; |
29b71a1c | 975 | |
d57d09a4 RW |
976 | /* Presence of _PRW indicates wake capable */ |
977 | status = acpi_get_handle(device->handle, "_PRW", &temp); | |
978 | if (ACPI_FAILURE(status)) | |
979 | return; | |
980 | ||
b581a7f9 RW |
981 | status = acpi_bus_extract_wakeup_device_power_package(device->handle, |
982 | &device->wakeup); | |
9e89dde2 ZR |
983 | if (ACPI_FAILURE(status)) { |
984 | ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package")); | |
d57d09a4 | 985 | return; |
9e89dde2 | 986 | } |
1da177e4 | 987 | |
9e89dde2 | 988 | device->wakeup.flags.valid = 1; |
9b83ccd2 | 989 | device->wakeup.prepare_count = 0; |
f517709d | 990 | acpi_bus_set_run_wake_flags(device); |
729b2bdb ZY |
991 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
992 | * system for the ACPI device with the _PRW object. | |
993 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. | |
994 | * So it is necessary to call _DSW object first. Only when it is not | |
995 | * present will the _PSW object used. | |
996 | */ | |
77e76609 RW |
997 | psw_error = acpi_device_sleep_wake(device, 0, 0, 0); |
998 | if (psw_error) | |
999 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
1000 | "error in _DSW or _PSW evaluation\n")); | |
1da177e4 | 1001 | } |
1da177e4 | 1002 | |
bf325f95 RW |
1003 | static void acpi_bus_add_power_resource(acpi_handle handle); |
1004 | ||
9e89dde2 | 1005 | static int acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 1006 | { |
9e89dde2 ZR |
1007 | acpi_status status = 0; |
1008 | acpi_handle handle = NULL; | |
1009 | u32 i = 0; | |
1a365616 | 1010 | |
4be44fcd | 1011 | |
9e89dde2 ZR |
1012 | /* |
1013 | * Power Management Flags | |
1014 | */ | |
1015 | status = acpi_get_handle(device->handle, "_PSC", &handle); | |
1016 | if (ACPI_SUCCESS(status)) | |
1017 | device->power.flags.explicit_get = 1; | |
1018 | status = acpi_get_handle(device->handle, "_IRC", &handle); | |
1019 | if (ACPI_SUCCESS(status)) | |
1020 | device->power.flags.inrush_current = 1; | |
1da177e4 | 1021 | |
9e89dde2 ZR |
1022 | /* |
1023 | * Enumerate supported power management states | |
1024 | */ | |
1cc0c998 | 1025 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) { |
9e89dde2 ZR |
1026 | struct acpi_device_power_state *ps = &device->power.states[i]; |
1027 | char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' }; | |
1da177e4 | 1028 | |
9e89dde2 ZR |
1029 | /* Evaluate "_PRx" to se if power resources are referenced */ |
1030 | acpi_evaluate_reference(device->handle, object_name, NULL, | |
1031 | &ps->resources); | |
1032 | if (ps->resources.count) { | |
bf325f95 RW |
1033 | int j; |
1034 | ||
9e89dde2 | 1035 | device->power.flags.power_resources = 1; |
bf325f95 RW |
1036 | for (j = 0; j < ps->resources.count; j++) |
1037 | acpi_bus_add_power_resource(ps->resources.handles[j]); | |
1da177e4 | 1038 | } |
1da177e4 | 1039 | |
9e89dde2 ZR |
1040 | /* Evaluate "_PSx" to see if we can do explicit sets */ |
1041 | object_name[2] = 'S'; | |
1042 | status = acpi_get_handle(device->handle, object_name, &handle); | |
37239978 | 1043 | if (ACPI_SUCCESS(status)) |
9e89dde2 | 1044 | ps->flags.explicit_set = 1; |
1da177e4 | 1045 | |
1cc0c998 LM |
1046 | /* |
1047 | * State is valid if there are means to put the device into it. | |
1048 | * D3hot is only valid if _PR3 present. | |
1049 | */ | |
1050 | if (ps->resources.count || | |
1399dfcd | 1051 | (ps->flags.explicit_set && i < ACPI_STATE_D3_HOT)) { |
9e89dde2 | 1052 | ps->flags.valid = 1; |
1399dfcd AL |
1053 | ps->flags.os_accessible = 1; |
1054 | } | |
1da177e4 | 1055 | |
9e89dde2 ZR |
1056 | ps->power = -1; /* Unknown - driver assigned */ |
1057 | ps->latency = -1; /* Unknown - driver assigned */ | |
1058 | } | |
1da177e4 | 1059 | |
9e89dde2 ZR |
1060 | /* Set defaults for D0 and D3 states (always valid) */ |
1061 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
1062 | device->power.states[ACPI_STATE_D0].power = 100; | |
1063 | device->power.states[ACPI_STATE_D3].flags.valid = 1; | |
1064 | device->power.states[ACPI_STATE_D3].power = 0; | |
c8f7a62c | 1065 | |
5c7dd710 RW |
1066 | /* Set D3cold's explicit_set flag if _PS3 exists. */ |
1067 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set) | |
1068 | device->power.states[ACPI_STATE_D3_COLD].flags.explicit_set = 1; | |
1069 | ||
1399dfcd AL |
1070 | /* Presence of _PS3 or _PRx means we can put the device into D3 cold */ |
1071 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set || | |
1072 | device->power.flags.power_resources) | |
1073 | device->power.states[ACPI_STATE_D3_COLD].flags.os_accessible = 1; | |
1074 | ||
ade3e7fe | 1075 | acpi_bus_init_power(device); |
c8f7a62c | 1076 | |
9e89dde2 ZR |
1077 | return 0; |
1078 | } | |
c8f7a62c | 1079 | |
4be44fcd | 1080 | static int acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 1081 | { |
4be44fcd LB |
1082 | acpi_status status = AE_OK; |
1083 | acpi_handle temp = NULL; | |
1da177e4 | 1084 | |
1da177e4 LT |
1085 | |
1086 | /* Presence of _STA indicates 'dynamic_status' */ | |
1087 | status = acpi_get_handle(device->handle, "_STA", &temp); | |
1088 | if (ACPI_SUCCESS(status)) | |
1089 | device->flags.dynamic_status = 1; | |
1090 | ||
1da177e4 LT |
1091 | /* Presence of _RMV indicates 'removable' */ |
1092 | status = acpi_get_handle(device->handle, "_RMV", &temp); | |
1093 | if (ACPI_SUCCESS(status)) | |
1094 | device->flags.removable = 1; | |
1095 | ||
1096 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
1097 | status = acpi_get_handle(device->handle, "_EJD", &temp); | |
1098 | if (ACPI_SUCCESS(status)) | |
1099 | device->flags.ejectable = 1; | |
1100 | else { | |
1101 | status = acpi_get_handle(device->handle, "_EJ0", &temp); | |
1102 | if (ACPI_SUCCESS(status)) | |
1103 | device->flags.ejectable = 1; | |
1104 | } | |
1105 | ||
7bed50c5 RW |
1106 | /* Power resources cannot be power manageable. */ |
1107 | if (device->device_type == ACPI_BUS_TYPE_POWER) | |
1108 | return 0; | |
1109 | ||
1da177e4 LT |
1110 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ |
1111 | status = acpi_get_handle(device->handle, "_PS0", &temp); | |
1112 | if (ACPI_FAILURE(status)) | |
1113 | status = acpi_get_handle(device->handle, "_PR0", &temp); | |
1114 | if (ACPI_SUCCESS(status)) | |
1115 | device->flags.power_manageable = 1; | |
1116 | ||
3c5f9be4 | 1117 | /* TBD: Performance management */ |
1da177e4 | 1118 | |
d550d98d | 1119 | return 0; |
1da177e4 LT |
1120 | } |
1121 | ||
c7bcb4e9 | 1122 | static void acpi_device_get_busid(struct acpi_device *device) |
1da177e4 | 1123 | { |
4be44fcd LB |
1124 | char bus_id[5] = { '?', 0 }; |
1125 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
1126 | int i = 0; | |
1da177e4 LT |
1127 | |
1128 | /* | |
1129 | * Bus ID | |
1130 | * ------ | |
1131 | * The device's Bus ID is simply the object name. | |
1132 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
1133 | */ | |
859ac9a4 | 1134 | if (ACPI_IS_ROOT_DEVICE(device)) { |
1da177e4 | 1135 | strcpy(device->pnp.bus_id, "ACPI"); |
859ac9a4 BH |
1136 | return; |
1137 | } | |
1138 | ||
1139 | switch (device->device_type) { | |
1da177e4 LT |
1140 | case ACPI_BUS_TYPE_POWER_BUTTON: |
1141 | strcpy(device->pnp.bus_id, "PWRF"); | |
1142 | break; | |
1143 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
1144 | strcpy(device->pnp.bus_id, "SLPF"); | |
1145 | break; | |
1146 | default: | |
66b7ed40 | 1147 | acpi_get_name(device->handle, ACPI_SINGLE_NAME, &buffer); |
1da177e4 LT |
1148 | /* Clean up trailing underscores (if any) */ |
1149 | for (i = 3; i > 1; i--) { | |
1150 | if (bus_id[i] == '_') | |
1151 | bus_id[i] = '\0'; | |
1152 | else | |
1153 | break; | |
1154 | } | |
1155 | strcpy(device->pnp.bus_id, bus_id); | |
1156 | break; | |
1157 | } | |
1158 | } | |
1159 | ||
54735266 ZR |
1160 | /* |
1161 | * acpi_bay_match - see if a device is an ejectable driver bay | |
1162 | * | |
1163 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
1164 | * then we can safely call it an ejectable drive bay | |
1165 | */ | |
1166 | static int acpi_bay_match(struct acpi_device *device){ | |
1167 | acpi_status status; | |
1168 | acpi_handle handle; | |
1169 | acpi_handle tmp; | |
1170 | acpi_handle phandle; | |
1171 | ||
1172 | handle = device->handle; | |
1173 | ||
1174 | status = acpi_get_handle(handle, "_EJ0", &tmp); | |
1175 | if (ACPI_FAILURE(status)) | |
1176 | return -ENODEV; | |
1177 | ||
1178 | if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || | |
1179 | (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || | |
1180 | (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || | |
1181 | (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) | |
1182 | return 0; | |
1183 | ||
1184 | if (acpi_get_parent(handle, &phandle)) | |
1185 | return -ENODEV; | |
1186 | ||
1187 | if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) || | |
1188 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) || | |
1189 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) || | |
1190 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp)))) | |
1191 | return 0; | |
1192 | ||
1193 | return -ENODEV; | |
1194 | } | |
1195 | ||
3620f2f2 FS |
1196 | /* |
1197 | * acpi_dock_match - see if a device has a _DCK method | |
1198 | */ | |
1199 | static int acpi_dock_match(struct acpi_device *device) | |
1200 | { | |
1201 | acpi_handle tmp; | |
1202 | return acpi_get_handle(device->handle, "_DCK", &tmp); | |
1203 | } | |
1204 | ||
620e112c | 1205 | const char *acpi_device_hid(struct acpi_device *device) |
15b8dd53 | 1206 | { |
7f47fa6c | 1207 | struct acpi_hardware_id *hid; |
15b8dd53 | 1208 | |
2b2ae7c7 TR |
1209 | if (list_empty(&device->pnp.ids)) |
1210 | return dummy_hid; | |
1211 | ||
7f47fa6c BH |
1212 | hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list); |
1213 | return hid->id; | |
1214 | } | |
1215 | EXPORT_SYMBOL(acpi_device_hid); | |
15b8dd53 | 1216 | |
7f47fa6c BH |
1217 | static void acpi_add_id(struct acpi_device *device, const char *dev_id) |
1218 | { | |
1219 | struct acpi_hardware_id *id; | |
15b8dd53 | 1220 | |
7f47fa6c BH |
1221 | id = kmalloc(sizeof(*id), GFP_KERNEL); |
1222 | if (!id) | |
1223 | return; | |
15b8dd53 | 1224 | |
581de59e | 1225 | id->id = kstrdup(dev_id, GFP_KERNEL); |
7f47fa6c BH |
1226 | if (!id->id) { |
1227 | kfree(id); | |
1228 | return; | |
15b8dd53 BM |
1229 | } |
1230 | ||
7f47fa6c | 1231 | list_add_tail(&id->list, &device->pnp.ids); |
15b8dd53 BM |
1232 | } |
1233 | ||
222e82ac DW |
1234 | /* |
1235 | * Old IBM workstations have a DSDT bug wherein the SMBus object | |
1236 | * lacks the SMBUS01 HID and the methods do not have the necessary "_" | |
1237 | * prefix. Work around this. | |
1238 | */ | |
1239 | static int acpi_ibm_smbus_match(struct acpi_device *device) | |
1240 | { | |
1241 | acpi_handle h_dummy; | |
1242 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
1243 | int result; | |
1244 | ||
1245 | if (!dmi_name_in_vendors("IBM")) | |
1246 | return -ENODEV; | |
1247 | ||
1248 | /* Look for SMBS object */ | |
1249 | result = acpi_get_name(device->handle, ACPI_SINGLE_NAME, &path); | |
1250 | if (result) | |
1251 | return result; | |
1252 | ||
1253 | if (strcmp("SMBS", path.pointer)) { | |
1254 | result = -ENODEV; | |
1255 | goto out; | |
1256 | } | |
1257 | ||
1258 | /* Does it have the necessary (but misnamed) methods? */ | |
1259 | result = -ENODEV; | |
1260 | if (ACPI_SUCCESS(acpi_get_handle(device->handle, "SBI", &h_dummy)) && | |
1261 | ACPI_SUCCESS(acpi_get_handle(device->handle, "SBR", &h_dummy)) && | |
1262 | ACPI_SUCCESS(acpi_get_handle(device->handle, "SBW", &h_dummy))) | |
1263 | result = 0; | |
1264 | out: | |
1265 | kfree(path.pointer); | |
1266 | return result; | |
1267 | } | |
1268 | ||
c7bcb4e9 | 1269 | static void acpi_device_set_id(struct acpi_device *device) |
1da177e4 | 1270 | { |
4be44fcd | 1271 | acpi_status status; |
57f3674f | 1272 | struct acpi_device_info *info; |
78e25fef | 1273 | struct acpi_pnp_device_id_list *cid_list; |
7f47fa6c | 1274 | int i; |
1da177e4 | 1275 | |
c7bcb4e9 | 1276 | switch (device->device_type) { |
1da177e4 | 1277 | case ACPI_BUS_TYPE_DEVICE: |
859ac9a4 | 1278 | if (ACPI_IS_ROOT_DEVICE(device)) { |
57f3674f | 1279 | acpi_add_id(device, ACPI_SYSTEM_HID); |
859ac9a4 BH |
1280 | break; |
1281 | } | |
1282 | ||
66b7ed40 | 1283 | status = acpi_get_object_info(device->handle, &info); |
1da177e4 | 1284 | if (ACPI_FAILURE(status)) { |
96b2dd1f | 1285 | printk(KERN_ERR PREFIX "%s: Error reading device info\n", __func__); |
1da177e4 LT |
1286 | return; |
1287 | } | |
1288 | ||
1da177e4 | 1289 | if (info->valid & ACPI_VALID_HID) |
57f3674f BH |
1290 | acpi_add_id(device, info->hardware_id.string); |
1291 | if (info->valid & ACPI_VALID_CID) { | |
15b8dd53 | 1292 | cid_list = &info->compatible_id_list; |
57f3674f BH |
1293 | for (i = 0; i < cid_list->count; i++) |
1294 | acpi_add_id(device, cid_list->ids[i].string); | |
1295 | } | |
1da177e4 LT |
1296 | if (info->valid & ACPI_VALID_ADR) { |
1297 | device->pnp.bus_address = info->address; | |
1298 | device->flags.bus_address = 1; | |
1299 | } | |
ccf78040 LZ |
1300 | if (info->valid & ACPI_VALID_UID) |
1301 | device->pnp.unique_id = kstrdup(info->unique_id.string, | |
1302 | GFP_KERNEL); | |
ae843332 | 1303 | |
a83893ae BH |
1304 | kfree(info); |
1305 | ||
57f3674f BH |
1306 | /* |
1307 | * Some devices don't reliably have _HIDs & _CIDs, so add | |
1308 | * synthetic HIDs to make sure drivers can find them. | |
1309 | */ | |
c3d6de69 | 1310 | if (acpi_is_video_device(device)) |
57f3674f | 1311 | acpi_add_id(device, ACPI_VIDEO_HID); |
3620f2f2 | 1312 | else if (ACPI_SUCCESS(acpi_bay_match(device))) |
57f3674f | 1313 | acpi_add_id(device, ACPI_BAY_HID); |
3620f2f2 | 1314 | else if (ACPI_SUCCESS(acpi_dock_match(device))) |
57f3674f | 1315 | acpi_add_id(device, ACPI_DOCK_HID); |
222e82ac DW |
1316 | else if (!acpi_ibm_smbus_match(device)) |
1317 | acpi_add_id(device, ACPI_SMBUS_IBM_HID); | |
b7b30de5 BH |
1318 | else if (!acpi_device_hid(device) && |
1319 | ACPI_IS_ROOT_DEVICE(device->parent)) { | |
1320 | acpi_add_id(device, ACPI_BUS_HID); /* \_SB, LNXSYBUS */ | |
1321 | strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME); | |
1322 | strcpy(device->pnp.device_class, ACPI_BUS_CLASS); | |
1323 | } | |
54735266 | 1324 | |
1da177e4 LT |
1325 | break; |
1326 | case ACPI_BUS_TYPE_POWER: | |
57f3674f | 1327 | acpi_add_id(device, ACPI_POWER_HID); |
1da177e4 LT |
1328 | break; |
1329 | case ACPI_BUS_TYPE_PROCESSOR: | |
57f3674f | 1330 | acpi_add_id(device, ACPI_PROCESSOR_OBJECT_HID); |
1da177e4 | 1331 | break; |
1da177e4 | 1332 | case ACPI_BUS_TYPE_THERMAL: |
57f3674f | 1333 | acpi_add_id(device, ACPI_THERMAL_HID); |
1da177e4 LT |
1334 | break; |
1335 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
57f3674f | 1336 | acpi_add_id(device, ACPI_BUTTON_HID_POWERF); |
1da177e4 LT |
1337 | break; |
1338 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
57f3674f | 1339 | acpi_add_id(device, ACPI_BUTTON_HID_SLEEPF); |
1da177e4 LT |
1340 | break; |
1341 | } | |
1da177e4 LT |
1342 | } |
1343 | ||
bc3b0772 | 1344 | static int acpi_device_set_context(struct acpi_device *device) |
1da177e4 | 1345 | { |
bc3b0772 BH |
1346 | acpi_status status; |
1347 | ||
1da177e4 LT |
1348 | /* |
1349 | * Context | |
1350 | * ------- | |
1351 | * Attach this 'struct acpi_device' to the ACPI object. This makes | |
bc3b0772 BH |
1352 | * resolutions from handle->device very efficient. Fixed hardware |
1353 | * devices have no handles, so we skip them. | |
1da177e4 | 1354 | */ |
bc3b0772 BH |
1355 | if (!device->handle) |
1356 | return 0; | |
1da177e4 | 1357 | |
bc3b0772 BH |
1358 | status = acpi_attach_data(device->handle, |
1359 | acpi_bus_data_handler, device); | |
1360 | if (ACPI_SUCCESS(status)) | |
1361 | return 0; | |
1362 | ||
1363 | printk(KERN_ERR PREFIX "Error attaching device data\n"); | |
1364 | return -ENODEV; | |
1da177e4 LT |
1365 | } |
1366 | ||
5c478f49 BH |
1367 | static int acpi_add_single_object(struct acpi_device **child, |
1368 | acpi_handle handle, int type, | |
209d3b17 | 1369 | unsigned long long sta, bool match_driver) |
1da177e4 | 1370 | { |
77c24888 BH |
1371 | int result; |
1372 | struct acpi_device *device; | |
29aaefa6 | 1373 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 1374 | |
36bcbec7 | 1375 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 1376 | if (!device) { |
6468463a | 1377 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 1378 | return -ENOMEM; |
1da177e4 | 1379 | } |
1da177e4 | 1380 | |
7f47fa6c | 1381 | INIT_LIST_HEAD(&device->pnp.ids); |
caaa6efb | 1382 | device->device_type = type; |
1da177e4 | 1383 | device->handle = handle; |
5c478f49 | 1384 | device->parent = acpi_bus_get_parent(handle); |
778cbc1d | 1385 | STRUCT_TO_INT(device->status) = sta; |
c4168bff | 1386 | |
c7bcb4e9 | 1387 | acpi_device_get_busid(device); |
1da177e4 LT |
1388 | |
1389 | /* | |
1390 | * Flags | |
1391 | * ----- | |
778cbc1d BH |
1392 | * Note that we only look for object handles -- cannot evaluate objects |
1393 | * until we know the device is present and properly initialized. | |
1da177e4 LT |
1394 | */ |
1395 | result = acpi_bus_get_flags(device); | |
1396 | if (result) | |
1397 | goto end; | |
1398 | ||
1da177e4 LT |
1399 | /* |
1400 | * Initialize Device | |
1401 | * ----------------- | |
1402 | * TBD: Synch with Core's enumeration/initialization process. | |
1403 | */ | |
c7bcb4e9 | 1404 | acpi_device_set_id(device); |
1da177e4 LT |
1405 | |
1406 | /* | |
1407 | * Power Management | |
1408 | * ---------------- | |
1409 | */ | |
1410 | if (device->flags.power_manageable) { | |
1411 | result = acpi_bus_get_power_flags(device); | |
1412 | if (result) | |
1413 | goto end; | |
1414 | } | |
1415 | ||
4be44fcd | 1416 | /* |
1da177e4 LT |
1417 | * Wakeup device management |
1418 | *----------------------- | |
1419 | */ | |
d57d09a4 | 1420 | acpi_bus_get_wakeup_device_flags(device); |
1da177e4 LT |
1421 | |
1422 | /* | |
1423 | * Performance Management | |
1424 | * ---------------------- | |
1425 | */ | |
1426 | if (device->flags.performance_manageable) { | |
1427 | result = acpi_bus_get_perf_flags(device); | |
1428 | if (result) | |
1429 | goto end; | |
1430 | } | |
1431 | ||
bc3b0772 | 1432 | if ((result = acpi_device_set_context(device))) |
f61f9258 | 1433 | goto end; |
1da177e4 | 1434 | |
209d3b17 | 1435 | device->flags.match_driver = match_driver; |
66b7ed40 | 1436 | result = acpi_device_register(device); |
1da177e4 | 1437 | |
0c526d96 | 1438 | end: |
29aaefa6 BH |
1439 | if (!result) { |
1440 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1441 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
1442 | "Adding %s [%s] parent %s\n", dev_name(&device->dev), | |
1443 | (char *) buffer.pointer, | |
1444 | device->parent ? dev_name(&device->parent->dev) : | |
1445 | "(null)")); | |
1446 | kfree(buffer.pointer); | |
1da177e4 | 1447 | *child = device; |
29aaefa6 | 1448 | } else |
718fb0de | 1449 | acpi_device_release(&device->dev); |
1da177e4 | 1450 | |
d550d98d | 1451 | return result; |
1da177e4 | 1452 | } |
1da177e4 | 1453 | |
778cbc1d BH |
1454 | #define ACPI_STA_DEFAULT (ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | \ |
1455 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING) | |
1456 | ||
bf325f95 RW |
1457 | static void acpi_bus_add_power_resource(acpi_handle handle) |
1458 | { | |
bf325f95 RW |
1459 | struct acpi_device *device = NULL; |
1460 | ||
1461 | acpi_bus_get_device(handle, &device); | |
1462 | if (!device) | |
1463 | acpi_add_single_object(&device, handle, ACPI_BUS_TYPE_POWER, | |
209d3b17 | 1464 | ACPI_STA_DEFAULT, true); |
bf325f95 RW |
1465 | } |
1466 | ||
778cbc1d BH |
1467 | static int acpi_bus_type_and_status(acpi_handle handle, int *type, |
1468 | unsigned long long *sta) | |
1da177e4 | 1469 | { |
778cbc1d BH |
1470 | acpi_status status; |
1471 | acpi_object_type acpi_type; | |
1da177e4 | 1472 | |
778cbc1d | 1473 | status = acpi_get_type(handle, &acpi_type); |
51a85faf | 1474 | if (ACPI_FAILURE(status)) |
778cbc1d | 1475 | return -ENODEV; |
4be44fcd | 1476 | |
778cbc1d | 1477 | switch (acpi_type) { |
51a85faf BH |
1478 | case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */ |
1479 | case ACPI_TYPE_DEVICE: | |
778cbc1d BH |
1480 | *type = ACPI_BUS_TYPE_DEVICE; |
1481 | status = acpi_bus_get_status_handle(handle, sta); | |
1482 | if (ACPI_FAILURE(status)) | |
1483 | return -ENODEV; | |
51a85faf BH |
1484 | break; |
1485 | case ACPI_TYPE_PROCESSOR: | |
778cbc1d BH |
1486 | *type = ACPI_BUS_TYPE_PROCESSOR; |
1487 | status = acpi_bus_get_status_handle(handle, sta); | |
1488 | if (ACPI_FAILURE(status)) | |
1489 | return -ENODEV; | |
51a85faf BH |
1490 | break; |
1491 | case ACPI_TYPE_THERMAL: | |
778cbc1d BH |
1492 | *type = ACPI_BUS_TYPE_THERMAL; |
1493 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1494 | break; |
1495 | case ACPI_TYPE_POWER: | |
778cbc1d BH |
1496 | *type = ACPI_BUS_TYPE_POWER; |
1497 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1498 | break; |
1499 | default: | |
778cbc1d | 1500 | return -ENODEV; |
51a85faf | 1501 | } |
1da177e4 | 1502 | |
778cbc1d BH |
1503 | return 0; |
1504 | } | |
1505 | ||
e3863094 RW |
1506 | static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used, |
1507 | void *not_used, void **return_value) | |
778cbc1d | 1508 | { |
805d410f | 1509 | struct acpi_device *device = NULL; |
778cbc1d BH |
1510 | int type; |
1511 | unsigned long long sta; | |
e3b87f8a | 1512 | acpi_status status; |
778cbc1d BH |
1513 | int result; |
1514 | ||
4002bf38 RW |
1515 | acpi_bus_get_device(handle, &device); |
1516 | if (device) | |
1517 | goto out; | |
1518 | ||
778cbc1d BH |
1519 | result = acpi_bus_type_and_status(handle, &type, &sta); |
1520 | if (result) | |
1521 | return AE_OK; | |
1522 | ||
1523 | if (!(sta & ACPI_STA_DEVICE_PRESENT) && | |
b581a7f9 | 1524 | !(sta & ACPI_STA_DEVICE_FUNCTIONING)) { |
86e4e20e RW |
1525 | struct acpi_device_wakeup wakeup; |
1526 | acpi_handle temp; | |
1527 | ||
1528 | status = acpi_get_handle(handle, "_PRW", &temp); | |
1529 | if (ACPI_SUCCESS(status)) | |
1530 | acpi_bus_extract_wakeup_device_power_package(handle, | |
1531 | &wakeup); | |
778cbc1d | 1532 | return AE_CTRL_DEPTH; |
b581a7f9 | 1533 | } |
778cbc1d | 1534 | |
f95988de RW |
1535 | acpi_add_single_object(&device, handle, type, sta, |
1536 | type == ACPI_BUS_TYPE_POWER); | |
4002bf38 RW |
1537 | if (!device) |
1538 | return AE_CTRL_DEPTH; | |
805d410f | 1539 | |
209d3b17 | 1540 | device->flags.match_driver = true; |
1da177e4 | 1541 | |
4002bf38 | 1542 | out: |
51a85faf BH |
1543 | if (!*return_value) |
1544 | *return_value = device; | |
805d410f | 1545 | |
51a85faf BH |
1546 | return AE_OK; |
1547 | } | |
3fb02738 | 1548 | |
0fc300b0 RW |
1549 | static acpi_status acpi_bus_device_attach(acpi_handle handle, u32 lvl_not_used, |
1550 | void *not_used, void **ret_not_used) | |
805d410f | 1551 | { |
805d410f RW |
1552 | acpi_status status = AE_OK; |
1553 | struct acpi_device *device; | |
1554 | unsigned long long sta_not_used; | |
1555 | int type_not_used; | |
1556 | ||
1557 | /* | |
1558 | * Ignore errors ignored by acpi_bus_check_add() to avoid terminating | |
1559 | * namespace walks prematurely. | |
1560 | */ | |
1561 | if (acpi_bus_type_and_status(handle, &type_not_used, &sta_not_used)) | |
1562 | return AE_OK; | |
1563 | ||
1564 | if (acpi_bus_get_device(handle, &device)) | |
1565 | return AE_CTRL_DEPTH; | |
1566 | ||
0fc300b0 RW |
1567 | if (!acpi_match_device_ids(device, acpi_platform_device_ids)) { |
1568 | /* This is a known good platform device. */ | |
1569 | acpi_create_platform_device(device); | |
abe99210 | 1570 | } else if (device_attach(&device->dev) < 0) { |
0fc300b0 | 1571 | status = AE_CTRL_DEPTH; |
805d410f RW |
1572 | } |
1573 | return status; | |
1574 | } | |
1575 | ||
636458de | 1576 | /** |
b8bd759a | 1577 | * acpi_bus_scan - Add ACPI device node objects in a given namespace scope. |
636458de | 1578 | * @handle: Root of the namespace scope to scan. |
636458de RW |
1579 | * |
1580 | * Scan a given ACPI tree (probably recently hot-plugged) and create and add | |
1581 | * found devices. | |
7779688f | 1582 | * |
636458de RW |
1583 | * If no devices were found, -ENODEV is returned, but it does not mean that |
1584 | * there has been a real error. There just have been no suitable ACPI objects | |
1585 | * in the table trunk from which the kernel could create a device and add an | |
1586 | * appropriate driver. | |
7779688f | 1587 | */ |
b8bd759a | 1588 | int acpi_bus_scan(acpi_handle handle) |
3fb02738 | 1589 | { |
b8bd759a | 1590 | void *device = NULL; |
c511cc19 RW |
1591 | int error = 0; |
1592 | ||
1593 | mutex_lock(&acpi_scan_lock); | |
d2f6650a | 1594 | |
b8bd759a RW |
1595 | if (ACPI_SUCCESS(acpi_bus_check_add(handle, 0, NULL, &device))) |
1596 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
1597 | acpi_bus_check_add, NULL, NULL, &device); | |
1598 | ||
1599 | if (!device) | |
c511cc19 RW |
1600 | error = -ENODEV; |
1601 | else if (ACPI_SUCCESS(acpi_bus_device_attach(handle, 0, NULL, NULL))) | |
b8bd759a RW |
1602 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
1603 | acpi_bus_device_attach, NULL, NULL, NULL); | |
a2100801 | 1604 | |
c511cc19 RW |
1605 | mutex_unlock(&acpi_scan_lock); |
1606 | return error; | |
3fb02738 | 1607 | } |
b8bd759a | 1608 | EXPORT_SYMBOL(acpi_bus_scan); |
1da177e4 | 1609 | |
05404d8f RW |
1610 | static acpi_status acpi_bus_device_detach(acpi_handle handle, u32 lvl_not_used, |
1611 | void *not_used, void **ret_not_used) | |
1612 | { | |
1613 | struct acpi_device *device = NULL; | |
1614 | ||
1615 | if (!acpi_bus_get_device(handle, &device)) { | |
1616 | device->removal_type = ACPI_BUS_REMOVAL_EJECT; | |
1617 | device_release_driver(&device->dev); | |
1618 | } | |
1619 | return AE_OK; | |
1620 | } | |
1621 | ||
1622 | static acpi_status acpi_bus_remove(acpi_handle handle, u32 lvl_not_used, | |
1623 | void *not_used, void **ret_not_used) | |
1624 | { | |
1625 | struct acpi_device *device = NULL; | |
1626 | ||
1627 | if (!acpi_bus_get_device(handle, &device)) | |
1628 | acpi_device_unregister(device); | |
1629 | ||
1630 | return AE_OK; | |
1631 | } | |
1632 | ||
bfee26db | 1633 | void acpi_bus_trim(struct acpi_device *start) |
1da177e4 | 1634 | { |
c511cc19 RW |
1635 | mutex_lock(&acpi_scan_lock); |
1636 | ||
05404d8f RW |
1637 | /* |
1638 | * Execute acpi_bus_device_detach() as a post-order callback to detach | |
1639 | * all ACPI drivers from the device nodes being removed. | |
1640 | */ | |
1641 | acpi_walk_namespace(ACPI_TYPE_ANY, start->handle, ACPI_UINT32_MAX, NULL, | |
1642 | acpi_bus_device_detach, NULL, NULL); | |
1643 | acpi_bus_device_detach(start->handle, 0, NULL, NULL); | |
cecdb193 RW |
1644 | /* |
1645 | * Execute acpi_bus_remove() as a post-order callback to remove device | |
1646 | * nodes in the given namespace scope. | |
1647 | */ | |
1648 | acpi_walk_namespace(ACPI_TYPE_ANY, start->handle, ACPI_UINT32_MAX, NULL, | |
1649 | acpi_bus_remove, NULL, NULL); | |
1650 | acpi_bus_remove(start->handle, 0, NULL, NULL); | |
c511cc19 RW |
1651 | |
1652 | mutex_unlock(&acpi_scan_lock); | |
1da177e4 | 1653 | } |
ceaba663 KA |
1654 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
1655 | ||
e8b945c9 | 1656 | static int acpi_bus_scan_fixed(void) |
1da177e4 | 1657 | { |
4be44fcd LB |
1658 | int result = 0; |
1659 | struct acpi_device *device = NULL; | |
c4168bff | 1660 | |
1da177e4 LT |
1661 | /* |
1662 | * Enumerate all fixed-feature devices. | |
1663 | */ | |
cee324b1 | 1664 | if ((acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON) == 0) { |
5c478f49 | 1665 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1666 | ACPI_BUS_TYPE_POWER_BUTTON, |
209d3b17 | 1667 | ACPI_STA_DEFAULT, true); |
c10d7a13 | 1668 | device_init_wakeup(&device->dev, true); |
3fb02738 | 1669 | } |
1da177e4 | 1670 | |
cee324b1 | 1671 | if ((acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON) == 0) { |
5c478f49 | 1672 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1673 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
209d3b17 | 1674 | ACPI_STA_DEFAULT, true); |
3fb02738 | 1675 | } |
1da177e4 | 1676 | |
d550d98d | 1677 | return result; |
1da177e4 LT |
1678 | } |
1679 | ||
e747f274 | 1680 | int __init acpi_scan_init(void) |
1da177e4 LT |
1681 | { |
1682 | int result; | |
1da177e4 | 1683 | |
5b327265 PM |
1684 | result = bus_register(&acpi_bus_type); |
1685 | if (result) { | |
1686 | /* We don't want to quit even if we failed to add suspend/resume */ | |
1687 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
1688 | } | |
1689 | ||
97d9a9e9 | 1690 | acpi_power_init(); |
92ef2a25 | 1691 | acpi_pci_root_init(); |
97d9a9e9 | 1692 | |
1da177e4 LT |
1693 | /* |
1694 | * Enumerate devices in the ACPI namespace. | |
1695 | */ | |
0cd6ac52 RW |
1696 | result = acpi_bus_scan(ACPI_ROOT_OBJECT); |
1697 | if (result) | |
1698 | return result; | |
c04209a7 | 1699 | |
0cd6ac52 | 1700 | result = acpi_bus_get_device(ACPI_ROOT_OBJECT, &acpi_root); |
1da177e4 | 1701 | if (result) |
b8bd759a RW |
1702 | return result; |
1703 | ||
1704 | result = acpi_bus_scan_fixed(); | |
1705 | if (result) { | |
b17b537a | 1706 | acpi_device_unregister(acpi_root); |
b8bd759a RW |
1707 | return result; |
1708 | } | |
1da177e4 | 1709 | |
b8bd759a RW |
1710 | acpi_update_all_gpes(); |
1711 | return 0; | |
1da177e4 | 1712 | } |