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