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); |
9090589d | 55 | DEFINE_MUTEX(acpi_device_lock); |
1da177e4 LT |
56 | LIST_HEAD(acpi_wakeup_device_list); |
57 | ||
e49bd2dd | 58 | struct acpi_device_bus_id{ |
bb095854 | 59 | char bus_id[15]; |
e49bd2dd ZR |
60 | unsigned int instance_no; |
61 | struct list_head node; | |
1da177e4 | 62 | }; |
29b71a1c TR |
63 | |
64 | /* | |
65 | * Creates hid/cid(s) string needed for modalias and uevent | |
66 | * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: | |
67 | * char *modalias: "acpi:IBM0001:ACPI0001" | |
68 | */ | |
b3e572d2 AB |
69 | static int create_modalias(struct acpi_device *acpi_dev, char *modalias, |
70 | int size) | |
71 | { | |
29b71a1c | 72 | int len; |
5c9fcb5d | 73 | int count; |
7f47fa6c | 74 | struct acpi_hardware_id *id; |
29b71a1c | 75 | |
2b2ae7c7 TR |
76 | if (list_empty(&acpi_dev->pnp.ids)) |
77 | return 0; | |
78 | ||
5c9fcb5d | 79 | len = snprintf(modalias, size, "acpi:"); |
29b71a1c TR |
80 | size -= len; |
81 | ||
7f47fa6c BH |
82 | list_for_each_entry(id, &acpi_dev->pnp.ids, list) { |
83 | count = snprintf(&modalias[len], size, "%s:", id->id); | |
5c9fcb5d ZR |
84 | if (count < 0 || count >= size) |
85 | return -EINVAL; | |
86 | len += count; | |
87 | size -= count; | |
88 | } | |
89 | ||
29b71a1c TR |
90 | modalias[len] = '\0'; |
91 | return len; | |
92 | } | |
93 | ||
94 | static ssize_t | |
95 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
96 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
97 | int len; | |
98 | ||
99 | /* Device has no HID and no CID or string is >1024 */ | |
100 | len = create_modalias(acpi_dev, buf, 1024); | |
101 | if (len <= 0) | |
102 | return 0; | |
103 | buf[len++] = '\n'; | |
104 | return len; | |
105 | } | |
106 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); | |
107 | ||
c4753e57 TK |
108 | /** |
109 | * acpi_bus_hot_remove_device: hot-remove a device and its children | |
110 | * @context: struct acpi_eject_event pointer (freed in this func) | |
111 | * | |
112 | * Hot-remove a device and its children. This function frees up the | |
113 | * memory space passed by arg context, so that the caller may call | |
114 | * this function asynchronously through acpi_os_hotplug_execute(). | |
115 | */ | |
116 | void acpi_bus_hot_remove_device(void *context) | |
1da177e4 | 117 | { |
c4753e57 | 118 | struct acpi_eject_event *ej_event = (struct acpi_eject_event *) context; |
5993c467 YL |
119 | struct acpi_device *device = ej_event->device; |
120 | acpi_handle handle = device->handle; | |
b3c450c3 | 121 | acpi_handle temp; |
1da177e4 LT |
122 | struct acpi_object_list arg_list; |
123 | union acpi_object arg; | |
124 | acpi_status status = AE_OK; | |
c4753e57 | 125 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; /* default */ |
1da177e4 | 126 | |
26d46867 | 127 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
0794469d | 128 | "Hot-removing device %s...\n", dev_name(&device->dev))); |
26d46867 | 129 | |
ae281795 | 130 | if (acpi_bus_trim(device)) { |
55ac9a01 LM |
131 | printk(KERN_ERR PREFIX |
132 | "Removing device failed\n"); | |
c4753e57 | 133 | goto err_out; |
26d46867 | 134 | } |
1da177e4 | 135 | |
b3c450c3 TK |
136 | /* device has been freed */ |
137 | device = NULL; | |
138 | ||
26d46867 ZR |
139 | /* power off device */ |
140 | status = acpi_evaluate_object(handle, "_PS3", NULL, NULL); | |
141 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) | |
55ac9a01 LM |
142 | printk(KERN_WARNING PREFIX |
143 | "Power-off device failed\n"); | |
26d46867 | 144 | |
b3c450c3 | 145 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_LCK", &temp))) { |
1da177e4 LT |
146 | arg_list.count = 1; |
147 | arg_list.pointer = &arg; | |
148 | arg.type = ACPI_TYPE_INTEGER; | |
149 | arg.integer.value = 0; | |
150 | acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); | |
151 | } | |
1da177e4 | 152 | |
1da177e4 LT |
153 | arg_list.count = 1; |
154 | arg_list.pointer = &arg; | |
155 | arg.type = ACPI_TYPE_INTEGER; | |
156 | arg.integer.value = 1; | |
1da177e4 | 157 | |
1da177e4 LT |
158 | /* |
159 | * TBD: _EJD support. | |
160 | */ | |
1da177e4 | 161 | status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); |
c4753e57 TK |
162 | if (ACPI_FAILURE(status)) { |
163 | if (status != AE_NOT_FOUND) | |
164 | printk(KERN_WARNING PREFIX | |
165 | "Eject device failed\n"); | |
166 | goto err_out; | |
167 | } | |
1da177e4 | 168 | |
c4753e57 TK |
169 | kfree(context); |
170 | return; | |
1da177e4 | 171 | |
c4753e57 TK |
172 | err_out: |
173 | /* Inform firmware the hot-remove operation has completed w/ error */ | |
174 | (void) acpi_evaluate_hotplug_ost(handle, | |
175 | ej_event->event, ost_code, NULL); | |
176 | kfree(context); | |
c8d72a5e | 177 | return; |
1da177e4 | 178 | } |
61622acc | 179 | EXPORT_SYMBOL(acpi_bus_hot_remove_device); |
1da177e4 | 180 | |
1da177e4 | 181 | static ssize_t |
f883d9db PM |
182 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
183 | const char *buf, size_t count) | |
1da177e4 | 184 | { |
4be44fcd | 185 | int ret = count; |
4be44fcd | 186 | acpi_status status; |
4be44fcd | 187 | acpi_object_type type = 0; |
f883d9db | 188 | struct acpi_device *acpi_device = to_acpi_device(d); |
c4753e57 | 189 | struct acpi_eject_event *ej_event; |
1da177e4 | 190 | |
1da177e4 LT |
191 | if ((!count) || (buf[0] != '1')) { |
192 | return -EINVAL; | |
193 | } | |
1da177e4 | 194 | #ifndef FORCE_EJECT |
f883d9db | 195 | if (acpi_device->driver == NULL) { |
1da177e4 LT |
196 | ret = -ENODEV; |
197 | goto err; | |
198 | } | |
199 | #endif | |
f883d9db PM |
200 | status = acpi_get_type(acpi_device->handle, &type); |
201 | if (ACPI_FAILURE(status) || (!acpi_device->flags.ejectable)) { | |
1da177e4 LT |
202 | ret = -ENODEV; |
203 | goto err; | |
204 | } | |
1da177e4 | 205 | |
c4753e57 TK |
206 | ej_event = kmalloc(sizeof(*ej_event), GFP_KERNEL); |
207 | if (!ej_event) { | |
208 | ret = -ENOMEM; | |
209 | goto err; | |
210 | } | |
211 | ||
5993c467 | 212 | ej_event->device = acpi_device; |
c4753e57 TK |
213 | if (acpi_device->flags.eject_pending) { |
214 | /* event originated from ACPI eject notification */ | |
215 | ej_event->event = ACPI_NOTIFY_EJECT_REQUEST; | |
216 | acpi_device->flags.eject_pending = 0; | |
217 | } else { | |
218 | /* event originated from user */ | |
219 | ej_event->event = ACPI_OST_EC_OSPM_EJECT; | |
5993c467 | 220 | (void) acpi_evaluate_hotplug_ost(acpi_device->handle, |
c4753e57 TK |
221 | ej_event->event, ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); |
222 | } | |
223 | ||
224 | acpi_os_hotplug_execute(acpi_bus_hot_remove_device, (void *)ej_event); | |
74523c90 | 225 | err: |
1da177e4 | 226 | return ret; |
1da177e4 LT |
227 | } |
228 | ||
f883d9db | 229 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
1da177e4 | 230 | |
e49bd2dd ZR |
231 | static ssize_t |
232 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
233 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1da177e4 | 234 | |
ea8d82fd | 235 | return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev)); |
1da177e4 | 236 | } |
e49bd2dd | 237 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
1da177e4 | 238 | |
923d4a45 LZ |
239 | static ssize_t acpi_device_uid_show(struct device *dev, |
240 | struct device_attribute *attr, char *buf) | |
241 | { | |
242 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
243 | ||
244 | return sprintf(buf, "%s\n", acpi_dev->pnp.unique_id); | |
245 | } | |
246 | static DEVICE_ATTR(uid, 0444, acpi_device_uid_show, NULL); | |
247 | ||
248 | static ssize_t acpi_device_adr_show(struct device *dev, | |
249 | struct device_attribute *attr, char *buf) | |
250 | { | |
251 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
252 | ||
253 | return sprintf(buf, "0x%08x\n", | |
254 | (unsigned int)(acpi_dev->pnp.bus_address)); | |
255 | } | |
256 | static DEVICE_ATTR(adr, 0444, acpi_device_adr_show, NULL); | |
257 | ||
e49bd2dd ZR |
258 | static ssize_t |
259 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
260 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
261 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
262 | int result; | |
1da177e4 | 263 | |
e49bd2dd | 264 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
0c526d96 | 265 | if (result) |
e49bd2dd | 266 | goto end; |
1da177e4 | 267 | |
e49bd2dd ZR |
268 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
269 | kfree(path.pointer); | |
0c526d96 | 270 | end: |
e49bd2dd | 271 | return result; |
1da177e4 | 272 | } |
e49bd2dd | 273 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
1da177e4 | 274 | |
d1efe3c3 LO |
275 | /* sysfs file that shows description text from the ACPI _STR method */ |
276 | static ssize_t description_show(struct device *dev, | |
277 | struct device_attribute *attr, | |
278 | char *buf) { | |
279 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
280 | int result; | |
281 | ||
282 | if (acpi_dev->pnp.str_obj == NULL) | |
283 | return 0; | |
284 | ||
285 | /* | |
286 | * The _STR object contains a Unicode identifier for a device. | |
287 | * We need to convert to utf-8 so it can be displayed. | |
288 | */ | |
289 | result = utf16s_to_utf8s( | |
290 | (wchar_t *)acpi_dev->pnp.str_obj->buffer.pointer, | |
291 | acpi_dev->pnp.str_obj->buffer.length, | |
292 | UTF16_LITTLE_ENDIAN, buf, | |
293 | PAGE_SIZE); | |
294 | ||
295 | buf[result++] = '\n'; | |
296 | ||
297 | return result; | |
298 | } | |
299 | static DEVICE_ATTR(description, 0444, description_show, NULL); | |
300 | ||
bb74ac23 YI |
301 | static ssize_t |
302 | acpi_device_sun_show(struct device *dev, struct device_attribute *attr, | |
303 | char *buf) { | |
304 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
305 | ||
306 | return sprintf(buf, "%lu\n", acpi_dev->pnp.sun); | |
307 | } | |
308 | static DEVICE_ATTR(sun, 0444, acpi_device_sun_show, NULL); | |
309 | ||
e49bd2dd | 310 | static int acpi_device_setup_files(struct acpi_device *dev) |
1da177e4 | 311 | { |
d1efe3c3 | 312 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
f883d9db PM |
313 | acpi_status status; |
314 | acpi_handle temp; | |
bb74ac23 | 315 | unsigned long long sun; |
e49bd2dd | 316 | int result = 0; |
1da177e4 LT |
317 | |
318 | /* | |
e49bd2dd | 319 | * Devices gotten from FADT don't have a "path" attribute |
1da177e4 | 320 | */ |
0c526d96 | 321 | if (dev->handle) { |
e49bd2dd | 322 | result = device_create_file(&dev->dev, &dev_attr_path); |
0c526d96 | 323 | if (result) |
e49bd2dd | 324 | goto end; |
1da177e4 LT |
325 | } |
326 | ||
2b2ae7c7 TR |
327 | if (!list_empty(&dev->pnp.ids)) { |
328 | result = device_create_file(&dev->dev, &dev_attr_hid); | |
329 | if (result) | |
330 | goto end; | |
1da177e4 | 331 | |
2b2ae7c7 TR |
332 | result = device_create_file(&dev->dev, &dev_attr_modalias); |
333 | if (result) | |
334 | goto end; | |
335 | } | |
29b71a1c | 336 | |
d1efe3c3 LO |
337 | /* |
338 | * If device has _STR, 'description' file is created | |
339 | */ | |
340 | status = acpi_get_handle(dev->handle, "_STR", &temp); | |
341 | if (ACPI_SUCCESS(status)) { | |
342 | status = acpi_evaluate_object(dev->handle, "_STR", | |
343 | NULL, &buffer); | |
344 | if (ACPI_FAILURE(status)) | |
345 | buffer.pointer = NULL; | |
346 | dev->pnp.str_obj = buffer.pointer; | |
347 | result = device_create_file(&dev->dev, &dev_attr_description); | |
348 | if (result) | |
349 | goto end; | |
350 | } | |
351 | ||
923d4a45 LZ |
352 | if (dev->flags.bus_address) |
353 | result = device_create_file(&dev->dev, &dev_attr_adr); | |
354 | if (dev->pnp.unique_id) | |
355 | result = device_create_file(&dev->dev, &dev_attr_uid); | |
356 | ||
bb74ac23 YI |
357 | status = acpi_evaluate_integer(dev->handle, "_SUN", NULL, &sun); |
358 | if (ACPI_SUCCESS(status)) { | |
359 | dev->pnp.sun = (unsigned long)sun; | |
360 | result = device_create_file(&dev->dev, &dev_attr_sun); | |
361 | if (result) | |
362 | goto end; | |
363 | } else { | |
364 | dev->pnp.sun = (unsigned long)-1; | |
365 | } | |
366 | ||
e49bd2dd ZR |
367 | /* |
368 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
369 | * hot-removal function from userland. | |
370 | */ | |
f883d9db PM |
371 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); |
372 | if (ACPI_SUCCESS(status)) | |
e49bd2dd | 373 | result = device_create_file(&dev->dev, &dev_attr_eject); |
0c526d96 | 374 | end: |
e49bd2dd | 375 | return result; |
1da177e4 LT |
376 | } |
377 | ||
f883d9db | 378 | static void acpi_device_remove_files(struct acpi_device *dev) |
1da177e4 | 379 | { |
f883d9db PM |
380 | acpi_status status; |
381 | acpi_handle temp; | |
1da177e4 | 382 | |
f883d9db | 383 | /* |
d1efe3c3 LO |
384 | * If device has _STR, remove 'description' file |
385 | */ | |
386 | status = acpi_get_handle(dev->handle, "_STR", &temp); | |
387 | if (ACPI_SUCCESS(status)) { | |
388 | kfree(dev->pnp.str_obj); | |
389 | device_remove_file(&dev->dev, &dev_attr_description); | |
390 | } | |
391 | /* | |
392 | * If device has _EJ0, remove 'eject' file. | |
f883d9db PM |
393 | */ |
394 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); | |
395 | if (ACPI_SUCCESS(status)) | |
396 | device_remove_file(&dev->dev, &dev_attr_eject); | |
1da177e4 | 397 | |
bb74ac23 YI |
398 | status = acpi_get_handle(dev->handle, "_SUN", &temp); |
399 | if (ACPI_SUCCESS(status)) | |
400 | device_remove_file(&dev->dev, &dev_attr_sun); | |
401 | ||
923d4a45 LZ |
402 | if (dev->pnp.unique_id) |
403 | device_remove_file(&dev->dev, &dev_attr_uid); | |
404 | if (dev->flags.bus_address) | |
405 | device_remove_file(&dev->dev, &dev_attr_adr); | |
1131b938 BH |
406 | device_remove_file(&dev->dev, &dev_attr_modalias); |
407 | device_remove_file(&dev->dev, &dev_attr_hid); | |
0c526d96 | 408 | if (dev->handle) |
e49bd2dd | 409 | device_remove_file(&dev->dev, &dev_attr_path); |
1da177e4 | 410 | } |
1da177e4 | 411 | /* -------------------------------------------------------------------------- |
9e89dde2 | 412 | ACPI Bus operations |
1da177e4 | 413 | -------------------------------------------------------------------------- */ |
29b71a1c | 414 | |
cf761af9 MW |
415 | static const struct acpi_device_id *__acpi_match_device( |
416 | struct acpi_device *device, const struct acpi_device_id *ids) | |
29b71a1c TR |
417 | { |
418 | const struct acpi_device_id *id; | |
7f47fa6c | 419 | struct acpi_hardware_id *hwid; |
29b71a1c | 420 | |
39a0ad87 ZY |
421 | /* |
422 | * If the device is not present, it is unnecessary to load device | |
423 | * driver for it. | |
424 | */ | |
425 | if (!device->status.present) | |
cf761af9 | 426 | return NULL; |
39a0ad87 | 427 | |
7f47fa6c BH |
428 | for (id = ids; id->id[0]; id++) |
429 | list_for_each_entry(hwid, &device->pnp.ids, list) | |
430 | if (!strcmp((char *) id->id, hwid->id)) | |
cf761af9 MW |
431 | return id; |
432 | ||
433 | return NULL; | |
434 | } | |
435 | ||
436 | /** | |
437 | * acpi_match_device - Match a struct device against a given list of ACPI IDs | |
438 | * @ids: Array of struct acpi_device_id object to match against. | |
439 | * @dev: The device structure to match. | |
440 | * | |
441 | * Check if @dev has a valid ACPI handle and if there is a struct acpi_device | |
442 | * object for that handle and use that object to match against a given list of | |
443 | * device IDs. | |
444 | * | |
445 | * Return a pointer to the first matching ID on success or %NULL on failure. | |
446 | */ | |
447 | const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids, | |
448 | const struct device *dev) | |
449 | { | |
450 | struct acpi_device *adev; | |
451 | ||
95f8a082 RW |
452 | if (!ids || !ACPI_HANDLE(dev) |
453 | || ACPI_FAILURE(acpi_bus_get_device(ACPI_HANDLE(dev), &adev))) | |
cf761af9 MW |
454 | return NULL; |
455 | ||
456 | return __acpi_match_device(adev, ids); | |
457 | } | |
458 | EXPORT_SYMBOL_GPL(acpi_match_device); | |
29b71a1c | 459 | |
cf761af9 MW |
460 | int acpi_match_device_ids(struct acpi_device *device, |
461 | const struct acpi_device_id *ids) | |
462 | { | |
463 | return __acpi_match_device(device, ids) ? 0 : -ENOENT; | |
29b71a1c TR |
464 | } |
465 | EXPORT_SYMBOL(acpi_match_device_ids); | |
466 | ||
7f47fa6c BH |
467 | static void acpi_free_ids(struct acpi_device *device) |
468 | { | |
469 | struct acpi_hardware_id *id, *tmp; | |
470 | ||
471 | list_for_each_entry_safe(id, tmp, &device->pnp.ids, list) { | |
472 | kfree(id->id); | |
473 | kfree(id); | |
474 | } | |
475 | } | |
476 | ||
1890a97a | 477 | static void acpi_device_release(struct device *dev) |
1da177e4 | 478 | { |
1890a97a | 479 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 480 | |
7f47fa6c | 481 | acpi_free_ids(acpi_dev); |
ccf78040 | 482 | kfree(acpi_dev->pnp.unique_id); |
1890a97a | 483 | kfree(acpi_dev); |
1da177e4 LT |
484 | } |
485 | ||
5d9464a4 | 486 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 487 | { |
5d9464a4 PM |
488 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
489 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
1da177e4 | 490 | |
209d3b17 | 491 | return acpi_dev->flags.match_driver |
805d410f | 492 | && !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
5d9464a4 | 493 | } |
1da177e4 | 494 | |
7eff2e7a | 495 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 | 496 | { |
5d9464a4 | 497 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
7eff2e7a | 498 | int len; |
5d9464a4 | 499 | |
2b2ae7c7 TR |
500 | if (list_empty(&acpi_dev->pnp.ids)) |
501 | return 0; | |
502 | ||
7eff2e7a KS |
503 | if (add_uevent_var(env, "MODALIAS=")) |
504 | return -ENOMEM; | |
505 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], | |
506 | sizeof(env->buf) - env->buflen); | |
507 | if (len >= (sizeof(env->buf) - env->buflen)) | |
508 | return -ENOMEM; | |
509 | env->buflen += len; | |
9e89dde2 | 510 | return 0; |
1da177e4 LT |
511 | } |
512 | ||
46ec8598 BH |
513 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
514 | { | |
515 | struct acpi_device *device = data; | |
516 | ||
517 | device->driver->ops.notify(device, event); | |
518 | } | |
519 | ||
520 | static acpi_status acpi_device_notify_fixed(void *data) | |
521 | { | |
522 | struct acpi_device *device = data; | |
523 | ||
53de5356 BH |
524 | /* Fixed hardware devices have no handles */ |
525 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); | |
46ec8598 BH |
526 | return AE_OK; |
527 | } | |
528 | ||
529 | static int acpi_device_install_notify_handler(struct acpi_device *device) | |
530 | { | |
531 | acpi_status status; | |
46ec8598 | 532 | |
ccba2a36 | 533 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
534 | status = |
535 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
536 | acpi_device_notify_fixed, | |
537 | device); | |
ccba2a36 | 538 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
539 | status = |
540 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
541 | acpi_device_notify_fixed, | |
542 | device); | |
543 | else | |
544 | status = acpi_install_notify_handler(device->handle, | |
545 | ACPI_DEVICE_NOTIFY, | |
546 | acpi_device_notify, | |
547 | device); | |
548 | ||
549 | if (ACPI_FAILURE(status)) | |
550 | return -EINVAL; | |
551 | return 0; | |
552 | } | |
553 | ||
554 | static void acpi_device_remove_notify_handler(struct acpi_device *device) | |
555 | { | |
ccba2a36 | 556 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
557 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, |
558 | acpi_device_notify_fixed); | |
ccba2a36 | 559 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
560 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, |
561 | acpi_device_notify_fixed); | |
562 | else | |
563 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, | |
564 | acpi_device_notify); | |
565 | } | |
566 | ||
5d9464a4 | 567 | static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *); |
5d9464a4 | 568 | static int acpi_device_probe(struct device * dev) |
1da177e4 | 569 | { |
5d9464a4 PM |
570 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
571 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
572 | int ret; | |
573 | ||
574 | ret = acpi_bus_driver_init(acpi_dev, acpi_drv); | |
575 | if (!ret) { | |
46ec8598 BH |
576 | if (acpi_drv->ops.notify) { |
577 | ret = acpi_device_install_notify_handler(acpi_dev); | |
578 | if (ret) { | |
46ec8598 BH |
579 | if (acpi_drv->ops.remove) |
580 | acpi_drv->ops.remove(acpi_dev, | |
581 | acpi_dev->removal_type); | |
582 | return ret; | |
583 | } | |
584 | } | |
585 | ||
5d9464a4 PM |
586 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
587 | "Found driver [%s] for device [%s]\n", | |
588 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
589 | get_device(dev); | |
590 | } | |
591 | return ret; | |
592 | } | |
1da177e4 | 593 | |
5d9464a4 PM |
594 | static int acpi_device_remove(struct device * dev) |
595 | { | |
596 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
597 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
598 | ||
599 | if (acpi_drv) { | |
46ec8598 BH |
600 | if (acpi_drv->ops.notify) |
601 | acpi_device_remove_notify_handler(acpi_dev); | |
5d9464a4 | 602 | if (acpi_drv->ops.remove) |
96333578 | 603 | acpi_drv->ops.remove(acpi_dev, acpi_dev->removal_type); |
1da177e4 | 604 | } |
5d9464a4 | 605 | acpi_dev->driver = NULL; |
db89b4f0 | 606 | acpi_dev->driver_data = NULL; |
1da177e4 | 607 | |
5d9464a4 | 608 | put_device(dev); |
9e89dde2 ZR |
609 | return 0; |
610 | } | |
1da177e4 | 611 | |
55955aad | 612 | struct bus_type acpi_bus_type = { |
9e89dde2 | 613 | .name = "acpi", |
5d9464a4 PM |
614 | .match = acpi_bus_match, |
615 | .probe = acpi_device_probe, | |
616 | .remove = acpi_device_remove, | |
617 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
618 | }; |
619 | ||
66b7ed40 | 620 | static int acpi_device_register(struct acpi_device *device) |
1da177e4 | 621 | { |
4be44fcd | 622 | int result; |
e49bd2dd ZR |
623 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
624 | int found = 0; | |
66b7ed40 | 625 | |
9e89dde2 ZR |
626 | /* |
627 | * Linkage | |
628 | * ------- | |
629 | * Link this device to its parent and siblings. | |
630 | */ | |
631 | INIT_LIST_HEAD(&device->children); | |
632 | INIT_LIST_HEAD(&device->node); | |
9e89dde2 | 633 | INIT_LIST_HEAD(&device->wakeup_list); |
1033f904 LT |
634 | INIT_LIST_HEAD(&device->physical_node_list); |
635 | mutex_init(&device->physical_node_lock); | |
1da177e4 | 636 | |
e49bd2dd ZR |
637 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
638 | if (!new_bus_id) { | |
639 | printk(KERN_ERR PREFIX "Memory allocation error\n"); | |
640 | return -ENOMEM; | |
1da177e4 | 641 | } |
e49bd2dd | 642 | |
9090589d | 643 | mutex_lock(&acpi_device_lock); |
e49bd2dd ZR |
644 | /* |
645 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
646 | * If failed, create one and link it into acpi_bus_id_list | |
647 | */ | |
648 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
1131b938 BH |
649 | if (!strcmp(acpi_device_bus_id->bus_id, |
650 | acpi_device_hid(device))) { | |
651 | acpi_device_bus_id->instance_no++; | |
e49bd2dd ZR |
652 | found = 1; |
653 | kfree(new_bus_id); | |
654 | break; | |
655 | } | |
1da177e4 | 656 | } |
0c526d96 | 657 | if (!found) { |
e49bd2dd | 658 | acpi_device_bus_id = new_bus_id; |
1131b938 | 659 | strcpy(acpi_device_bus_id->bus_id, acpi_device_hid(device)); |
e49bd2dd ZR |
660 | acpi_device_bus_id->instance_no = 0; |
661 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 662 | } |
0794469d | 663 | dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 664 | |
33b57150 | 665 | if (device->parent) |
9e89dde2 | 666 | list_add_tail(&device->node, &device->parent->children); |
33b57150 | 667 | |
9e89dde2 ZR |
668 | if (device->wakeup.flags.valid) |
669 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
9090589d | 670 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 671 | |
1890a97a | 672 | if (device->parent) |
66b7ed40 | 673 | device->dev.parent = &device->parent->dev; |
1890a97a | 674 | device->dev.bus = &acpi_bus_type; |
1890a97a | 675 | device->dev.release = &acpi_device_release; |
8b12b922 | 676 | result = device_register(&device->dev); |
0c526d96 | 677 | if (result) { |
8b12b922 | 678 | dev_err(&device->dev, "Error registering device\n"); |
e49bd2dd | 679 | goto end; |
1da177e4 | 680 | } |
1da177e4 | 681 | |
e49bd2dd | 682 | result = acpi_device_setup_files(device); |
0c526d96 | 683 | if (result) |
0794469d KS |
684 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
685 | dev_name(&device->dev)); | |
1da177e4 | 686 | |
96333578 | 687 | device->removal_type = ACPI_BUS_REMOVAL_NORMAL; |
1da177e4 | 688 | return 0; |
0c526d96 | 689 | end: |
9090589d | 690 | mutex_lock(&acpi_device_lock); |
33b57150 | 691 | if (device->parent) |
e49bd2dd | 692 | list_del(&device->node); |
e49bd2dd | 693 | list_del(&device->wakeup_list); |
9090589d | 694 | mutex_unlock(&acpi_device_lock); |
e49bd2dd | 695 | return result; |
1da177e4 LT |
696 | } |
697 | ||
b17b537a | 698 | static void acpi_device_unregister(struct acpi_device *device) |
9e89dde2 | 699 | { |
9090589d | 700 | mutex_lock(&acpi_device_lock); |
33b57150 | 701 | if (device->parent) |
9e89dde2 | 702 | list_del(&device->node); |
1da177e4 | 703 | |
9e89dde2 | 704 | list_del(&device->wakeup_list); |
9090589d | 705 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 706 | |
9e89dde2 | 707 | acpi_detach_data(device->handle, acpi_bus_data_handler); |
1890a97a | 708 | |
f883d9db | 709 | acpi_device_remove_files(device); |
1890a97a | 710 | device_unregister(&device->dev); |
1da177e4 LT |
711 | } |
712 | ||
9e89dde2 ZR |
713 | /* -------------------------------------------------------------------------- |
714 | Driver Management | |
715 | -------------------------------------------------------------------------- */ | |
1da177e4 | 716 | /** |
d758a8fa RD |
717 | * acpi_bus_driver_init - add a device to a driver |
718 | * @device: the device to add and initialize | |
719 | * @driver: driver for the device | |
720 | * | |
0c526d96 | 721 | * Used to initialize a device via its device driver. Called whenever a |
1890a97a | 722 | * driver is bound to a device. Invokes the driver's add() ops. |
1da177e4 LT |
723 | */ |
724 | static int | |
4be44fcd | 725 | acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) |
1da177e4 | 726 | { |
4be44fcd | 727 | int result = 0; |
1da177e4 | 728 | |
1da177e4 | 729 | if (!device || !driver) |
d550d98d | 730 | return -EINVAL; |
1da177e4 LT |
731 | |
732 | if (!driver->ops.add) | |
d550d98d | 733 | return -ENOSYS; |
1da177e4 LT |
734 | |
735 | result = driver->ops.add(device); | |
736 | if (result) { | |
737 | device->driver = NULL; | |
db89b4f0 | 738 | device->driver_data = NULL; |
d550d98d | 739 | return result; |
1da177e4 LT |
740 | } |
741 | ||
742 | device->driver = driver; | |
743 | ||
744 | /* | |
745 | * TBD - Configuration Management: Assign resources to device based | |
746 | * upon possible configuration and currently allocated resources. | |
747 | */ | |
748 | ||
4be44fcd LB |
749 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
750 | "Driver successfully bound to device\n")); | |
d550d98d | 751 | return 0; |
3fb02738 RS |
752 | } |
753 | ||
9e89dde2 ZR |
754 | /** |
755 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
756 | * @driver: driver being registered | |
757 | * | |
758 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
759 | * devices that match the driver's criteria and binds. Returns zero for | |
760 | * success or a negative error status for failure. | |
761 | */ | |
762 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
1da177e4 | 763 | { |
1890a97a | 764 | int ret; |
1da177e4 | 765 | |
9e89dde2 ZR |
766 | if (acpi_disabled) |
767 | return -ENODEV; | |
1890a97a PM |
768 | driver->drv.name = driver->name; |
769 | driver->drv.bus = &acpi_bus_type; | |
770 | driver->drv.owner = driver->owner; | |
1da177e4 | 771 | |
1890a97a PM |
772 | ret = driver_register(&driver->drv); |
773 | return ret; | |
9e89dde2 | 774 | } |
1da177e4 | 775 | |
9e89dde2 ZR |
776 | EXPORT_SYMBOL(acpi_bus_register_driver); |
777 | ||
778 | /** | |
779 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus | |
780 | * @driver: driver to unregister | |
781 | * | |
782 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
783 | * devices that match the driver's criteria and unbinds. | |
784 | */ | |
785 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
786 | { | |
1890a97a | 787 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
788 | } |
789 | ||
790 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
791 | ||
9e89dde2 ZR |
792 | /* -------------------------------------------------------------------------- |
793 | Device Enumeration | |
794 | -------------------------------------------------------------------------- */ | |
5c478f49 BH |
795 | static struct acpi_device *acpi_bus_get_parent(acpi_handle handle) |
796 | { | |
797 | acpi_status status; | |
798 | int ret; | |
799 | struct acpi_device *device; | |
800 | ||
801 | /* | |
802 | * Fixed hardware devices do not appear in the namespace and do not | |
803 | * have handles, but we fabricate acpi_devices for them, so we have | |
804 | * to deal with them specially. | |
805 | */ | |
806 | if (handle == NULL) | |
807 | return acpi_root; | |
808 | ||
809 | do { | |
810 | status = acpi_get_parent(handle, &handle); | |
811 | if (status == AE_NULL_ENTRY) | |
812 | return NULL; | |
813 | if (ACPI_FAILURE(status)) | |
814 | return acpi_root; | |
815 | ||
816 | ret = acpi_bus_get_device(handle, &device); | |
817 | if (ret == 0) | |
818 | return device; | |
819 | } while (1); | |
820 | } | |
821 | ||
9e89dde2 ZR |
822 | acpi_status |
823 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
824 | { | |
825 | acpi_status status; | |
826 | acpi_handle tmp; | |
827 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
828 | union acpi_object *obj; | |
829 | ||
830 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
831 | if (ACPI_FAILURE(status)) | |
832 | return status; | |
833 | ||
834 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
835 | if (ACPI_SUCCESS(status)) { | |
836 | obj = buffer.pointer; | |
3b5fee59 HM |
837 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
838 | ejd); | |
9e89dde2 ZR |
839 | kfree(buffer.pointer); |
840 | } | |
841 | return status; | |
842 | } | |
843 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
844 | ||
8e4319c4 | 845 | void acpi_bus_data_handler(acpi_handle handle, void *context) |
9e89dde2 ZR |
846 | { |
847 | ||
848 | /* TBD */ | |
849 | ||
850 | return; | |
851 | } | |
852 | ||
9e89dde2 ZR |
853 | static int acpi_bus_get_perf_flags(struct acpi_device *device) |
854 | { | |
855 | device->performance.state = ACPI_STATE_UNKNOWN; | |
856 | return 0; | |
857 | } | |
858 | ||
859 | static acpi_status | |
b581a7f9 RW |
860 | acpi_bus_extract_wakeup_device_power_package(acpi_handle handle, |
861 | struct acpi_device_wakeup *wakeup) | |
9e89dde2 | 862 | { |
b581a7f9 RW |
863 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
864 | union acpi_object *package = NULL; | |
9e89dde2 | 865 | union acpi_object *element = NULL; |
b581a7f9 RW |
866 | acpi_status status; |
867 | int i = 0; | |
9e89dde2 | 868 | |
b581a7f9 | 869 | if (!wakeup) |
9e89dde2 ZR |
870 | return AE_BAD_PARAMETER; |
871 | ||
b581a7f9 RW |
872 | /* _PRW */ |
873 | status = acpi_evaluate_object(handle, "_PRW", NULL, &buffer); | |
874 | if (ACPI_FAILURE(status)) { | |
875 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
876 | return status; | |
877 | } | |
878 | ||
879 | package = (union acpi_object *)buffer.pointer; | |
880 | ||
881 | if (!package || (package->package.count < 2)) { | |
882 | status = AE_BAD_DATA; | |
883 | goto out; | |
884 | } | |
885 | ||
9e89dde2 | 886 | element = &(package->package.elements[0]); |
b581a7f9 RW |
887 | if (!element) { |
888 | status = AE_BAD_DATA; | |
889 | goto out; | |
890 | } | |
9e89dde2 ZR |
891 | if (element->type == ACPI_TYPE_PACKAGE) { |
892 | if ((element->package.count < 2) || | |
893 | (element->package.elements[0].type != | |
894 | ACPI_TYPE_LOCAL_REFERENCE) | |
b581a7f9 RW |
895 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) { |
896 | status = AE_BAD_DATA; | |
897 | goto out; | |
898 | } | |
899 | wakeup->gpe_device = | |
9e89dde2 | 900 | element->package.elements[0].reference.handle; |
b581a7f9 | 901 | wakeup->gpe_number = |
9e89dde2 ZR |
902 | (u32) element->package.elements[1].integer.value; |
903 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
b581a7f9 RW |
904 | wakeup->gpe_device = NULL; |
905 | wakeup->gpe_number = element->integer.value; | |
906 | } else { | |
907 | status = AE_BAD_DATA; | |
908 | goto out; | |
909 | } | |
9e89dde2 ZR |
910 | |
911 | element = &(package->package.elements[1]); | |
912 | if (element->type != ACPI_TYPE_INTEGER) { | |
b581a7f9 RW |
913 | status = AE_BAD_DATA; |
914 | goto out; | |
9e89dde2 | 915 | } |
b581a7f9 | 916 | wakeup->sleep_state = element->integer.value; |
9e89dde2 ZR |
917 | |
918 | if ((package->package.count - 2) > ACPI_MAX_HANDLES) { | |
b581a7f9 RW |
919 | status = AE_NO_MEMORY; |
920 | goto out; | |
9e89dde2 | 921 | } |
b581a7f9 RW |
922 | wakeup->resources.count = package->package.count - 2; |
923 | for (i = 0; i < wakeup->resources.count; i++) { | |
9e89dde2 | 924 | element = &(package->package.elements[i + 2]); |
b581a7f9 RW |
925 | if (element->type != ACPI_TYPE_LOCAL_REFERENCE) { |
926 | status = AE_BAD_DATA; | |
927 | goto out; | |
928 | } | |
9e89dde2 | 929 | |
b581a7f9 | 930 | wakeup->resources.handles[i] = element->reference.handle; |
1da177e4 | 931 | } |
9e89dde2 | 932 | |
bba63a29 | 933 | acpi_setup_gpe_for_wake(handle, wakeup->gpe_device, wakeup->gpe_number); |
9874647b | 934 | |
b581a7f9 RW |
935 | out: |
936 | kfree(buffer.pointer); | |
937 | ||
938 | return status; | |
1da177e4 LT |
939 | } |
940 | ||
f517709d | 941 | static void acpi_bus_set_run_wake_flags(struct acpi_device *device) |
1da177e4 | 942 | { |
29b71a1c | 943 | struct acpi_device_id button_device_ids[] = { |
29b71a1c | 944 | {"PNP0C0C", 0}, |
b7e38304 | 945 | {"PNP0C0D", 0}, |
29b71a1c TR |
946 | {"PNP0C0E", 0}, |
947 | {"", 0}, | |
948 | }; | |
f517709d RW |
949 | acpi_status status; |
950 | acpi_event_status event_status; | |
951 | ||
b67ea761 | 952 | device->wakeup.flags.notifier_present = 0; |
f517709d RW |
953 | |
954 | /* Power button, Lid switch always enable wakeup */ | |
955 | if (!acpi_match_device_ids(device, button_device_ids)) { | |
956 | device->wakeup.flags.run_wake = 1; | |
b7e38304 ZR |
957 | if (!acpi_match_device_ids(device, &button_device_ids[1])) { |
958 | /* Do not use Lid/sleep button for S5 wakeup */ | |
959 | if (device->wakeup.sleep_state == ACPI_STATE_S5) | |
960 | device->wakeup.sleep_state = ACPI_STATE_S4; | |
961 | } | |
f2b56bc8 | 962 | device_set_wakeup_capable(&device->dev, true); |
f517709d RW |
963 | return; |
964 | } | |
965 | ||
e8e18c95 RW |
966 | status = acpi_get_gpe_status(device->wakeup.gpe_device, |
967 | device->wakeup.gpe_number, | |
968 | &event_status); | |
f517709d RW |
969 | if (status == AE_OK) |
970 | device->wakeup.flags.run_wake = | |
971 | !!(event_status & ACPI_EVENT_FLAG_HANDLE); | |
972 | } | |
973 | ||
d57d09a4 | 974 | static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
f517709d | 975 | { |
d57d09a4 | 976 | acpi_handle temp; |
f517709d | 977 | acpi_status status = 0; |
f517709d | 978 | int psw_error; |
29b71a1c | 979 | |
d57d09a4 RW |
980 | /* Presence of _PRW indicates wake capable */ |
981 | status = acpi_get_handle(device->handle, "_PRW", &temp); | |
982 | if (ACPI_FAILURE(status)) | |
983 | return; | |
984 | ||
b581a7f9 RW |
985 | status = acpi_bus_extract_wakeup_device_power_package(device->handle, |
986 | &device->wakeup); | |
9e89dde2 ZR |
987 | if (ACPI_FAILURE(status)) { |
988 | ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package")); | |
d57d09a4 | 989 | return; |
9e89dde2 | 990 | } |
1da177e4 | 991 | |
9e89dde2 | 992 | device->wakeup.flags.valid = 1; |
9b83ccd2 | 993 | device->wakeup.prepare_count = 0; |
f517709d | 994 | acpi_bus_set_run_wake_flags(device); |
729b2bdb ZY |
995 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
996 | * system for the ACPI device with the _PRW object. | |
997 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. | |
998 | * So it is necessary to call _DSW object first. Only when it is not | |
999 | * present will the _PSW object used. | |
1000 | */ | |
77e76609 RW |
1001 | psw_error = acpi_device_sleep_wake(device, 0, 0, 0); |
1002 | if (psw_error) | |
1003 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
1004 | "error in _DSW or _PSW evaluation\n")); | |
1da177e4 | 1005 | } |
1da177e4 | 1006 | |
bf325f95 RW |
1007 | static void acpi_bus_add_power_resource(acpi_handle handle); |
1008 | ||
9e89dde2 | 1009 | static int acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 1010 | { |
9e89dde2 ZR |
1011 | acpi_status status = 0; |
1012 | acpi_handle handle = NULL; | |
1013 | u32 i = 0; | |
1a365616 | 1014 | |
4be44fcd | 1015 | |
9e89dde2 ZR |
1016 | /* |
1017 | * Power Management Flags | |
1018 | */ | |
1019 | status = acpi_get_handle(device->handle, "_PSC", &handle); | |
1020 | if (ACPI_SUCCESS(status)) | |
1021 | device->power.flags.explicit_get = 1; | |
1022 | status = acpi_get_handle(device->handle, "_IRC", &handle); | |
1023 | if (ACPI_SUCCESS(status)) | |
1024 | device->power.flags.inrush_current = 1; | |
1da177e4 | 1025 | |
9e89dde2 ZR |
1026 | /* |
1027 | * Enumerate supported power management states | |
1028 | */ | |
1cc0c998 | 1029 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) { |
9e89dde2 ZR |
1030 | struct acpi_device_power_state *ps = &device->power.states[i]; |
1031 | char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' }; | |
1da177e4 | 1032 | |
9e89dde2 ZR |
1033 | /* Evaluate "_PRx" to se if power resources are referenced */ |
1034 | acpi_evaluate_reference(device->handle, object_name, NULL, | |
1035 | &ps->resources); | |
1036 | if (ps->resources.count) { | |
bf325f95 RW |
1037 | int j; |
1038 | ||
9e89dde2 | 1039 | device->power.flags.power_resources = 1; |
bf325f95 RW |
1040 | for (j = 0; j < ps->resources.count; j++) |
1041 | acpi_bus_add_power_resource(ps->resources.handles[j]); | |
1da177e4 | 1042 | } |
1da177e4 | 1043 | |
9e89dde2 ZR |
1044 | /* Evaluate "_PSx" to see if we can do explicit sets */ |
1045 | object_name[2] = 'S'; | |
1046 | status = acpi_get_handle(device->handle, object_name, &handle); | |
37239978 | 1047 | if (ACPI_SUCCESS(status)) |
9e89dde2 | 1048 | ps->flags.explicit_set = 1; |
1da177e4 | 1049 | |
1cc0c998 LM |
1050 | /* |
1051 | * State is valid if there are means to put the device into it. | |
1052 | * D3hot is only valid if _PR3 present. | |
1053 | */ | |
1054 | if (ps->resources.count || | |
1399dfcd | 1055 | (ps->flags.explicit_set && i < ACPI_STATE_D3_HOT)) { |
9e89dde2 | 1056 | ps->flags.valid = 1; |
1399dfcd AL |
1057 | ps->flags.os_accessible = 1; |
1058 | } | |
1da177e4 | 1059 | |
9e89dde2 ZR |
1060 | ps->power = -1; /* Unknown - driver assigned */ |
1061 | ps->latency = -1; /* Unknown - driver assigned */ | |
1062 | } | |
1da177e4 | 1063 | |
9e89dde2 ZR |
1064 | /* Set defaults for D0 and D3 states (always valid) */ |
1065 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
1066 | device->power.states[ACPI_STATE_D0].power = 100; | |
1067 | device->power.states[ACPI_STATE_D3].flags.valid = 1; | |
1068 | device->power.states[ACPI_STATE_D3].power = 0; | |
c8f7a62c | 1069 | |
5c7dd710 RW |
1070 | /* Set D3cold's explicit_set flag if _PS3 exists. */ |
1071 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set) | |
1072 | device->power.states[ACPI_STATE_D3_COLD].flags.explicit_set = 1; | |
1073 | ||
1399dfcd AL |
1074 | /* Presence of _PS3 or _PRx means we can put the device into D3 cold */ |
1075 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set || | |
1076 | device->power.flags.power_resources) | |
1077 | device->power.states[ACPI_STATE_D3_COLD].flags.os_accessible = 1; | |
1078 | ||
ade3e7fe | 1079 | acpi_bus_init_power(device); |
c8f7a62c | 1080 | |
9e89dde2 ZR |
1081 | return 0; |
1082 | } | |
c8f7a62c | 1083 | |
4be44fcd | 1084 | static int acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 1085 | { |
4be44fcd LB |
1086 | acpi_status status = AE_OK; |
1087 | acpi_handle temp = NULL; | |
1da177e4 | 1088 | |
1da177e4 LT |
1089 | |
1090 | /* Presence of _STA indicates 'dynamic_status' */ | |
1091 | status = acpi_get_handle(device->handle, "_STA", &temp); | |
1092 | if (ACPI_SUCCESS(status)) | |
1093 | device->flags.dynamic_status = 1; | |
1094 | ||
1da177e4 LT |
1095 | /* Presence of _RMV indicates 'removable' */ |
1096 | status = acpi_get_handle(device->handle, "_RMV", &temp); | |
1097 | if (ACPI_SUCCESS(status)) | |
1098 | device->flags.removable = 1; | |
1099 | ||
1100 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
1101 | status = acpi_get_handle(device->handle, "_EJD", &temp); | |
1102 | if (ACPI_SUCCESS(status)) | |
1103 | device->flags.ejectable = 1; | |
1104 | else { | |
1105 | status = acpi_get_handle(device->handle, "_EJ0", &temp); | |
1106 | if (ACPI_SUCCESS(status)) | |
1107 | device->flags.ejectable = 1; | |
1108 | } | |
1109 | ||
7bed50c5 RW |
1110 | /* Power resources cannot be power manageable. */ |
1111 | if (device->device_type == ACPI_BUS_TYPE_POWER) | |
1112 | return 0; | |
1113 | ||
1da177e4 LT |
1114 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ |
1115 | status = acpi_get_handle(device->handle, "_PS0", &temp); | |
1116 | if (ACPI_FAILURE(status)) | |
1117 | status = acpi_get_handle(device->handle, "_PR0", &temp); | |
1118 | if (ACPI_SUCCESS(status)) | |
1119 | device->flags.power_manageable = 1; | |
1120 | ||
3c5f9be4 | 1121 | /* TBD: Performance management */ |
1da177e4 | 1122 | |
d550d98d | 1123 | return 0; |
1da177e4 LT |
1124 | } |
1125 | ||
c7bcb4e9 | 1126 | static void acpi_device_get_busid(struct acpi_device *device) |
1da177e4 | 1127 | { |
4be44fcd LB |
1128 | char bus_id[5] = { '?', 0 }; |
1129 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
1130 | int i = 0; | |
1da177e4 LT |
1131 | |
1132 | /* | |
1133 | * Bus ID | |
1134 | * ------ | |
1135 | * The device's Bus ID is simply the object name. | |
1136 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
1137 | */ | |
859ac9a4 | 1138 | if (ACPI_IS_ROOT_DEVICE(device)) { |
1da177e4 | 1139 | strcpy(device->pnp.bus_id, "ACPI"); |
859ac9a4 BH |
1140 | return; |
1141 | } | |
1142 | ||
1143 | switch (device->device_type) { | |
1da177e4 LT |
1144 | case ACPI_BUS_TYPE_POWER_BUTTON: |
1145 | strcpy(device->pnp.bus_id, "PWRF"); | |
1146 | break; | |
1147 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
1148 | strcpy(device->pnp.bus_id, "SLPF"); | |
1149 | break; | |
1150 | default: | |
66b7ed40 | 1151 | acpi_get_name(device->handle, ACPI_SINGLE_NAME, &buffer); |
1da177e4 LT |
1152 | /* Clean up trailing underscores (if any) */ |
1153 | for (i = 3; i > 1; i--) { | |
1154 | if (bus_id[i] == '_') | |
1155 | bus_id[i] = '\0'; | |
1156 | else | |
1157 | break; | |
1158 | } | |
1159 | strcpy(device->pnp.bus_id, bus_id); | |
1160 | break; | |
1161 | } | |
1162 | } | |
1163 | ||
54735266 ZR |
1164 | /* |
1165 | * acpi_bay_match - see if a device is an ejectable driver bay | |
1166 | * | |
1167 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
1168 | * then we can safely call it an ejectable drive bay | |
1169 | */ | |
1170 | static int acpi_bay_match(struct acpi_device *device){ | |
1171 | acpi_status status; | |
1172 | acpi_handle handle; | |
1173 | acpi_handle tmp; | |
1174 | acpi_handle phandle; | |
1175 | ||
1176 | handle = device->handle; | |
1177 | ||
1178 | status = acpi_get_handle(handle, "_EJ0", &tmp); | |
1179 | if (ACPI_FAILURE(status)) | |
1180 | return -ENODEV; | |
1181 | ||
1182 | if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || | |
1183 | (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || | |
1184 | (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || | |
1185 | (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) | |
1186 | return 0; | |
1187 | ||
1188 | if (acpi_get_parent(handle, &phandle)) | |
1189 | return -ENODEV; | |
1190 | ||
1191 | if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) || | |
1192 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) || | |
1193 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) || | |
1194 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp)))) | |
1195 | return 0; | |
1196 | ||
1197 | return -ENODEV; | |
1198 | } | |
1199 | ||
3620f2f2 FS |
1200 | /* |
1201 | * acpi_dock_match - see if a device has a _DCK method | |
1202 | */ | |
1203 | static int acpi_dock_match(struct acpi_device *device) | |
1204 | { | |
1205 | acpi_handle tmp; | |
1206 | return acpi_get_handle(device->handle, "_DCK", &tmp); | |
1207 | } | |
1208 | ||
620e112c | 1209 | const char *acpi_device_hid(struct acpi_device *device) |
15b8dd53 | 1210 | { |
7f47fa6c | 1211 | struct acpi_hardware_id *hid; |
15b8dd53 | 1212 | |
2b2ae7c7 TR |
1213 | if (list_empty(&device->pnp.ids)) |
1214 | return dummy_hid; | |
1215 | ||
7f47fa6c BH |
1216 | hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list); |
1217 | return hid->id; | |
1218 | } | |
1219 | EXPORT_SYMBOL(acpi_device_hid); | |
15b8dd53 | 1220 | |
7f47fa6c BH |
1221 | static void acpi_add_id(struct acpi_device *device, const char *dev_id) |
1222 | { | |
1223 | struct acpi_hardware_id *id; | |
15b8dd53 | 1224 | |
7f47fa6c BH |
1225 | id = kmalloc(sizeof(*id), GFP_KERNEL); |
1226 | if (!id) | |
1227 | return; | |
15b8dd53 | 1228 | |
581de59e | 1229 | id->id = kstrdup(dev_id, GFP_KERNEL); |
7f47fa6c BH |
1230 | if (!id->id) { |
1231 | kfree(id); | |
1232 | return; | |
15b8dd53 BM |
1233 | } |
1234 | ||
7f47fa6c | 1235 | list_add_tail(&id->list, &device->pnp.ids); |
15b8dd53 BM |
1236 | } |
1237 | ||
222e82ac DW |
1238 | /* |
1239 | * Old IBM workstations have a DSDT bug wherein the SMBus object | |
1240 | * lacks the SMBUS01 HID and the methods do not have the necessary "_" | |
1241 | * prefix. Work around this. | |
1242 | */ | |
1243 | static int acpi_ibm_smbus_match(struct acpi_device *device) | |
1244 | { | |
1245 | acpi_handle h_dummy; | |
1246 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
1247 | int result; | |
1248 | ||
1249 | if (!dmi_name_in_vendors("IBM")) | |
1250 | return -ENODEV; | |
1251 | ||
1252 | /* Look for SMBS object */ | |
1253 | result = acpi_get_name(device->handle, ACPI_SINGLE_NAME, &path); | |
1254 | if (result) | |
1255 | return result; | |
1256 | ||
1257 | if (strcmp("SMBS", path.pointer)) { | |
1258 | result = -ENODEV; | |
1259 | goto out; | |
1260 | } | |
1261 | ||
1262 | /* Does it have the necessary (but misnamed) methods? */ | |
1263 | result = -ENODEV; | |
1264 | if (ACPI_SUCCESS(acpi_get_handle(device->handle, "SBI", &h_dummy)) && | |
1265 | ACPI_SUCCESS(acpi_get_handle(device->handle, "SBR", &h_dummy)) && | |
1266 | ACPI_SUCCESS(acpi_get_handle(device->handle, "SBW", &h_dummy))) | |
1267 | result = 0; | |
1268 | out: | |
1269 | kfree(path.pointer); | |
1270 | return result; | |
1271 | } | |
1272 | ||
c7bcb4e9 | 1273 | static void acpi_device_set_id(struct acpi_device *device) |
1da177e4 | 1274 | { |
4be44fcd | 1275 | acpi_status status; |
57f3674f | 1276 | struct acpi_device_info *info; |
78e25fef | 1277 | struct acpi_pnp_device_id_list *cid_list; |
7f47fa6c | 1278 | int i; |
1da177e4 | 1279 | |
c7bcb4e9 | 1280 | switch (device->device_type) { |
1da177e4 | 1281 | case ACPI_BUS_TYPE_DEVICE: |
859ac9a4 | 1282 | if (ACPI_IS_ROOT_DEVICE(device)) { |
57f3674f | 1283 | acpi_add_id(device, ACPI_SYSTEM_HID); |
859ac9a4 BH |
1284 | break; |
1285 | } | |
1286 | ||
66b7ed40 | 1287 | status = acpi_get_object_info(device->handle, &info); |
1da177e4 | 1288 | if (ACPI_FAILURE(status)) { |
96b2dd1f | 1289 | printk(KERN_ERR PREFIX "%s: Error reading device info\n", __func__); |
1da177e4 LT |
1290 | return; |
1291 | } | |
1292 | ||
1da177e4 | 1293 | if (info->valid & ACPI_VALID_HID) |
57f3674f BH |
1294 | acpi_add_id(device, info->hardware_id.string); |
1295 | if (info->valid & ACPI_VALID_CID) { | |
15b8dd53 | 1296 | cid_list = &info->compatible_id_list; |
57f3674f BH |
1297 | for (i = 0; i < cid_list->count; i++) |
1298 | acpi_add_id(device, cid_list->ids[i].string); | |
1299 | } | |
1da177e4 LT |
1300 | if (info->valid & ACPI_VALID_ADR) { |
1301 | device->pnp.bus_address = info->address; | |
1302 | device->flags.bus_address = 1; | |
1303 | } | |
ccf78040 LZ |
1304 | if (info->valid & ACPI_VALID_UID) |
1305 | device->pnp.unique_id = kstrdup(info->unique_id.string, | |
1306 | GFP_KERNEL); | |
ae843332 | 1307 | |
a83893ae BH |
1308 | kfree(info); |
1309 | ||
57f3674f BH |
1310 | /* |
1311 | * Some devices don't reliably have _HIDs & _CIDs, so add | |
1312 | * synthetic HIDs to make sure drivers can find them. | |
1313 | */ | |
c3d6de69 | 1314 | if (acpi_is_video_device(device)) |
57f3674f | 1315 | acpi_add_id(device, ACPI_VIDEO_HID); |
3620f2f2 | 1316 | else if (ACPI_SUCCESS(acpi_bay_match(device))) |
57f3674f | 1317 | acpi_add_id(device, ACPI_BAY_HID); |
3620f2f2 | 1318 | else if (ACPI_SUCCESS(acpi_dock_match(device))) |
57f3674f | 1319 | acpi_add_id(device, ACPI_DOCK_HID); |
222e82ac DW |
1320 | else if (!acpi_ibm_smbus_match(device)) |
1321 | acpi_add_id(device, ACPI_SMBUS_IBM_HID); | |
4f5f64cf | 1322 | else if (list_empty(&device->pnp.ids) && |
b7b30de5 BH |
1323 | ACPI_IS_ROOT_DEVICE(device->parent)) { |
1324 | acpi_add_id(device, ACPI_BUS_HID); /* \_SB, LNXSYBUS */ | |
1325 | strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME); | |
1326 | strcpy(device->pnp.device_class, ACPI_BUS_CLASS); | |
1327 | } | |
54735266 | 1328 | |
1da177e4 LT |
1329 | break; |
1330 | case ACPI_BUS_TYPE_POWER: | |
57f3674f | 1331 | acpi_add_id(device, ACPI_POWER_HID); |
1da177e4 LT |
1332 | break; |
1333 | case ACPI_BUS_TYPE_PROCESSOR: | |
57f3674f | 1334 | acpi_add_id(device, ACPI_PROCESSOR_OBJECT_HID); |
1da177e4 | 1335 | break; |
1da177e4 | 1336 | case ACPI_BUS_TYPE_THERMAL: |
57f3674f | 1337 | acpi_add_id(device, ACPI_THERMAL_HID); |
1da177e4 LT |
1338 | break; |
1339 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
57f3674f | 1340 | acpi_add_id(device, ACPI_BUTTON_HID_POWERF); |
1da177e4 LT |
1341 | break; |
1342 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
57f3674f | 1343 | acpi_add_id(device, ACPI_BUTTON_HID_SLEEPF); |
1da177e4 LT |
1344 | break; |
1345 | } | |
1da177e4 LT |
1346 | } |
1347 | ||
bc3b0772 | 1348 | static int acpi_device_set_context(struct acpi_device *device) |
1da177e4 | 1349 | { |
bc3b0772 BH |
1350 | acpi_status status; |
1351 | ||
1da177e4 LT |
1352 | /* |
1353 | * Context | |
1354 | * ------- | |
1355 | * Attach this 'struct acpi_device' to the ACPI object. This makes | |
bc3b0772 BH |
1356 | * resolutions from handle->device very efficient. Fixed hardware |
1357 | * devices have no handles, so we skip them. | |
1da177e4 | 1358 | */ |
bc3b0772 BH |
1359 | if (!device->handle) |
1360 | return 0; | |
1da177e4 | 1361 | |
bc3b0772 BH |
1362 | status = acpi_attach_data(device->handle, |
1363 | acpi_bus_data_handler, device); | |
1364 | if (ACPI_SUCCESS(status)) | |
1365 | return 0; | |
1366 | ||
1367 | printk(KERN_ERR PREFIX "Error attaching device data\n"); | |
1368 | return -ENODEV; | |
1da177e4 LT |
1369 | } |
1370 | ||
5c478f49 BH |
1371 | static int acpi_add_single_object(struct acpi_device **child, |
1372 | acpi_handle handle, int type, | |
209d3b17 | 1373 | unsigned long long sta, bool match_driver) |
1da177e4 | 1374 | { |
77c24888 BH |
1375 | int result; |
1376 | struct acpi_device *device; | |
29aaefa6 | 1377 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 1378 | |
36bcbec7 | 1379 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 1380 | if (!device) { |
6468463a | 1381 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 1382 | return -ENOMEM; |
1da177e4 | 1383 | } |
1da177e4 | 1384 | |
7f47fa6c | 1385 | INIT_LIST_HEAD(&device->pnp.ids); |
caaa6efb | 1386 | device->device_type = type; |
1da177e4 | 1387 | device->handle = handle; |
5c478f49 | 1388 | device->parent = acpi_bus_get_parent(handle); |
778cbc1d | 1389 | STRUCT_TO_INT(device->status) = sta; |
c4168bff | 1390 | |
c7bcb4e9 | 1391 | acpi_device_get_busid(device); |
1da177e4 LT |
1392 | |
1393 | /* | |
1394 | * Flags | |
1395 | * ----- | |
778cbc1d BH |
1396 | * Note that we only look for object handles -- cannot evaluate objects |
1397 | * until we know the device is present and properly initialized. | |
1da177e4 LT |
1398 | */ |
1399 | result = acpi_bus_get_flags(device); | |
1400 | if (result) | |
1401 | goto end; | |
1402 | ||
1da177e4 LT |
1403 | /* |
1404 | * Initialize Device | |
1405 | * ----------------- | |
1406 | * TBD: Synch with Core's enumeration/initialization process. | |
1407 | */ | |
c7bcb4e9 | 1408 | acpi_device_set_id(device); |
1da177e4 LT |
1409 | |
1410 | /* | |
1411 | * Power Management | |
1412 | * ---------------- | |
1413 | */ | |
1414 | if (device->flags.power_manageable) { | |
1415 | result = acpi_bus_get_power_flags(device); | |
1416 | if (result) | |
1417 | goto end; | |
1418 | } | |
1419 | ||
4be44fcd | 1420 | /* |
1da177e4 LT |
1421 | * Wakeup device management |
1422 | *----------------------- | |
1423 | */ | |
d57d09a4 | 1424 | acpi_bus_get_wakeup_device_flags(device); |
1da177e4 LT |
1425 | |
1426 | /* | |
1427 | * Performance Management | |
1428 | * ---------------------- | |
1429 | */ | |
1430 | if (device->flags.performance_manageable) { | |
1431 | result = acpi_bus_get_perf_flags(device); | |
1432 | if (result) | |
1433 | goto end; | |
1434 | } | |
1435 | ||
bc3b0772 | 1436 | if ((result = acpi_device_set_context(device))) |
f61f9258 | 1437 | goto end; |
1da177e4 | 1438 | |
209d3b17 | 1439 | device->flags.match_driver = match_driver; |
66b7ed40 | 1440 | result = acpi_device_register(device); |
1da177e4 | 1441 | |
0c526d96 | 1442 | end: |
29aaefa6 BH |
1443 | if (!result) { |
1444 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1445 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
1446 | "Adding %s [%s] parent %s\n", dev_name(&device->dev), | |
1447 | (char *) buffer.pointer, | |
1448 | device->parent ? dev_name(&device->parent->dev) : | |
1449 | "(null)")); | |
1450 | kfree(buffer.pointer); | |
1da177e4 | 1451 | *child = device; |
29aaefa6 | 1452 | } else |
718fb0de | 1453 | acpi_device_release(&device->dev); |
1da177e4 | 1454 | |
d550d98d | 1455 | return result; |
1da177e4 | 1456 | } |
1da177e4 | 1457 | |
778cbc1d BH |
1458 | #define ACPI_STA_DEFAULT (ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | \ |
1459 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING) | |
1460 | ||
bf325f95 RW |
1461 | static void acpi_bus_add_power_resource(acpi_handle handle) |
1462 | { | |
bf325f95 RW |
1463 | struct acpi_device *device = NULL; |
1464 | ||
1465 | acpi_bus_get_device(handle, &device); | |
1466 | if (!device) | |
1467 | acpi_add_single_object(&device, handle, ACPI_BUS_TYPE_POWER, | |
209d3b17 | 1468 | ACPI_STA_DEFAULT, true); |
bf325f95 RW |
1469 | } |
1470 | ||
778cbc1d BH |
1471 | static int acpi_bus_type_and_status(acpi_handle handle, int *type, |
1472 | unsigned long long *sta) | |
1da177e4 | 1473 | { |
778cbc1d BH |
1474 | acpi_status status; |
1475 | acpi_object_type acpi_type; | |
1da177e4 | 1476 | |
778cbc1d | 1477 | status = acpi_get_type(handle, &acpi_type); |
51a85faf | 1478 | if (ACPI_FAILURE(status)) |
778cbc1d | 1479 | return -ENODEV; |
4be44fcd | 1480 | |
778cbc1d | 1481 | switch (acpi_type) { |
51a85faf BH |
1482 | case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */ |
1483 | case ACPI_TYPE_DEVICE: | |
778cbc1d BH |
1484 | *type = ACPI_BUS_TYPE_DEVICE; |
1485 | status = acpi_bus_get_status_handle(handle, sta); | |
1486 | if (ACPI_FAILURE(status)) | |
1487 | return -ENODEV; | |
51a85faf BH |
1488 | break; |
1489 | case ACPI_TYPE_PROCESSOR: | |
778cbc1d BH |
1490 | *type = ACPI_BUS_TYPE_PROCESSOR; |
1491 | status = acpi_bus_get_status_handle(handle, sta); | |
1492 | if (ACPI_FAILURE(status)) | |
1493 | return -ENODEV; | |
51a85faf BH |
1494 | break; |
1495 | case ACPI_TYPE_THERMAL: | |
778cbc1d BH |
1496 | *type = ACPI_BUS_TYPE_THERMAL; |
1497 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1498 | break; |
1499 | case ACPI_TYPE_POWER: | |
778cbc1d BH |
1500 | *type = ACPI_BUS_TYPE_POWER; |
1501 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1502 | break; |
1503 | default: | |
778cbc1d | 1504 | return -ENODEV; |
51a85faf | 1505 | } |
1da177e4 | 1506 | |
778cbc1d BH |
1507 | return 0; |
1508 | } | |
1509 | ||
e3863094 RW |
1510 | static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used, |
1511 | void *not_used, void **return_value) | |
778cbc1d | 1512 | { |
805d410f | 1513 | struct acpi_device *device = NULL; |
778cbc1d BH |
1514 | int type; |
1515 | unsigned long long sta; | |
e3b87f8a | 1516 | acpi_status status; |
778cbc1d BH |
1517 | int result; |
1518 | ||
4002bf38 RW |
1519 | acpi_bus_get_device(handle, &device); |
1520 | if (device) | |
1521 | goto out; | |
1522 | ||
778cbc1d BH |
1523 | result = acpi_bus_type_and_status(handle, &type, &sta); |
1524 | if (result) | |
1525 | return AE_OK; | |
1526 | ||
1527 | if (!(sta & ACPI_STA_DEVICE_PRESENT) && | |
b581a7f9 | 1528 | !(sta & ACPI_STA_DEVICE_FUNCTIONING)) { |
86e4e20e RW |
1529 | struct acpi_device_wakeup wakeup; |
1530 | acpi_handle temp; | |
1531 | ||
1532 | status = acpi_get_handle(handle, "_PRW", &temp); | |
1533 | if (ACPI_SUCCESS(status)) | |
1534 | acpi_bus_extract_wakeup_device_power_package(handle, | |
1535 | &wakeup); | |
778cbc1d | 1536 | return AE_CTRL_DEPTH; |
b581a7f9 | 1537 | } |
778cbc1d | 1538 | |
f95988de RW |
1539 | acpi_add_single_object(&device, handle, type, sta, |
1540 | type == ACPI_BUS_TYPE_POWER); | |
e3b87f8a | 1541 | if (!device) |
51a85faf | 1542 | return AE_CTRL_DEPTH; |
1da177e4 | 1543 | |
209d3b17 | 1544 | device->flags.match_driver = true; |
1da177e4 | 1545 | |
4002bf38 | 1546 | out: |
51a85faf BH |
1547 | if (!*return_value) |
1548 | *return_value = device; | |
805d410f | 1549 | |
51a85faf BH |
1550 | return AE_OK; |
1551 | } | |
3fb02738 | 1552 | |
0fc300b0 RW |
1553 | static acpi_status acpi_bus_device_attach(acpi_handle handle, u32 lvl_not_used, |
1554 | void *not_used, void **ret_not_used) | |
805d410f | 1555 | { |
805d410f RW |
1556 | acpi_status status = AE_OK; |
1557 | struct acpi_device *device; | |
1558 | unsigned long long sta_not_used; | |
1559 | int type_not_used; | |
1560 | ||
1561 | /* | |
1562 | * Ignore errors ignored by acpi_bus_check_add() to avoid terminating | |
1563 | * namespace walks prematurely. | |
1564 | */ | |
1565 | if (acpi_bus_type_and_status(handle, &type_not_used, &sta_not_used)) | |
1566 | return AE_OK; | |
1567 | ||
1568 | if (acpi_bus_get_device(handle, &device)) | |
1569 | return AE_CTRL_DEPTH; | |
1570 | ||
0fc300b0 RW |
1571 | if (!acpi_match_device_ids(device, acpi_platform_device_ids)) { |
1572 | /* This is a known good platform device. */ | |
1573 | acpi_create_platform_device(device); | |
abe99210 | 1574 | } else if (device_attach(&device->dev) < 0) { |
0fc300b0 | 1575 | status = AE_CTRL_DEPTH; |
805d410f RW |
1576 | } |
1577 | return status; | |
1578 | } | |
1579 | ||
0cd6ac52 | 1580 | static int acpi_bus_scan(acpi_handle handle) |
51a85faf | 1581 | { |
51a85faf | 1582 | void *device = NULL; |
3fb02738 | 1583 | |
0cd6ac52 | 1584 | if (ACPI_SUCCESS(acpi_bus_check_add(handle, 0, NULL, &device))) |
51a85faf | 1585 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
e3863094 | 1586 | acpi_bus_check_add, NULL, NULL, &device); |
1da177e4 | 1587 | |
805d410f | 1588 | if (!device) |
7779688f | 1589 | return -ENODEV; |
805d410f | 1590 | |
0cd6ac52 | 1591 | if (ACPI_SUCCESS(acpi_bus_device_attach(handle, 0, NULL, NULL))) |
805d410f | 1592 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
0fc300b0 | 1593 | acpi_bus_device_attach, NULL, NULL, NULL); |
805d410f | 1594 | |
0cd6ac52 | 1595 | return 0; |
1da177e4 | 1596 | } |
1da177e4 | 1597 | |
636458de RW |
1598 | /** |
1599 | * acpi_bus_add - Add ACPI device node objects in a given namespace scope. | |
1600 | * @handle: Root of the namespace scope to scan. | |
7779688f | 1601 | * |
636458de RW |
1602 | * Scan a given ACPI tree (probably recently hot-plugged) and create and add |
1603 | * found devices. | |
7779688f | 1604 | * |
636458de RW |
1605 | * If no devices were found, -ENODEV is returned, but it does not mean that |
1606 | * there has been a real error. There just have been no suitable ACPI objects | |
1607 | * in the table trunk from which the kernel could create a device and add an | |
1608 | * appropriate driver. | |
7779688f | 1609 | */ |
0cd6ac52 | 1610 | int acpi_bus_add(acpi_handle handle) |
3fb02738 | 1611 | { |
02f57c67 | 1612 | int err; |
3fb02738 | 1613 | |
0cd6ac52 | 1614 | err = acpi_bus_scan(handle); |
02f57c67 RW |
1615 | if (err) |
1616 | return err; | |
3fb02738 | 1617 | |
3a37898d | 1618 | acpi_update_all_gpes(); |
0fc300b0 | 1619 | return 0; |
3fb02738 RS |
1620 | } |
1621 | EXPORT_SYMBOL(acpi_bus_add); | |
1622 | ||
05404d8f RW |
1623 | static acpi_status acpi_bus_device_detach(acpi_handle handle, u32 lvl_not_used, |
1624 | void *not_used, void **ret_not_used) | |
3fb02738 | 1625 | { |
05404d8f | 1626 | struct acpi_device *device = NULL; |
a2100801 | 1627 | |
05404d8f RW |
1628 | if (!acpi_bus_get_device(handle, &device)) { |
1629 | device->removal_type = ACPI_BUS_REMOVAL_EJECT; | |
1630 | device_release_driver(&device->dev); | |
1631 | } | |
1632 | return AE_OK; | |
3fb02738 | 1633 | } |
1da177e4 | 1634 | |
05404d8f RW |
1635 | static acpi_status acpi_bus_remove(acpi_handle handle, u32 lvl_not_used, |
1636 | void *not_used, void **ret_not_used) | |
1da177e4 | 1637 | { |
05404d8f | 1638 | struct acpi_device *device = NULL; |
1da177e4 | 1639 | |
05404d8f RW |
1640 | if (!acpi_bus_get_device(handle, &device)) |
1641 | acpi_device_unregister(device); | |
1da177e4 | 1642 | |
05404d8f RW |
1643 | return AE_OK; |
1644 | } | |
1da177e4 | 1645 | |
ae281795 | 1646 | int acpi_bus_trim(struct acpi_device *start) |
1da177e4 | 1647 | { |
05404d8f RW |
1648 | /* |
1649 | * Execute acpi_bus_device_detach() as a post-order callback to detach | |
1650 | * all ACPI drivers from the device nodes being removed. | |
1651 | */ | |
1652 | acpi_walk_namespace(ACPI_TYPE_ANY, start->handle, ACPI_UINT32_MAX, NULL, | |
1653 | acpi_bus_device_detach, NULL, NULL); | |
1654 | acpi_bus_device_detach(start->handle, 0, NULL, NULL); | |
cecdb193 RW |
1655 | /* |
1656 | * Execute acpi_bus_remove() as a post-order callback to remove device | |
1657 | * nodes in the given namespace scope. | |
1658 | */ | |
1659 | acpi_walk_namespace(ACPI_TYPE_ANY, start->handle, ACPI_UINT32_MAX, NULL, | |
1660 | acpi_bus_remove, NULL, NULL); | |
1661 | acpi_bus_remove(start->handle, 0, NULL, NULL); | |
1662 | return 0; | |
1da177e4 | 1663 | } |
ceaba663 KA |
1664 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
1665 | ||
e8b945c9 | 1666 | static int acpi_bus_scan_fixed(void) |
1da177e4 | 1667 | { |
4be44fcd LB |
1668 | int result = 0; |
1669 | struct acpi_device *device = NULL; | |
c4168bff | 1670 | |
1da177e4 LT |
1671 | /* |
1672 | * Enumerate all fixed-feature devices. | |
1673 | */ | |
cee324b1 | 1674 | if ((acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON) == 0) { |
5c478f49 | 1675 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1676 | ACPI_BUS_TYPE_POWER_BUTTON, |
209d3b17 | 1677 | ACPI_STA_DEFAULT, true); |
c10d7a13 | 1678 | device_init_wakeup(&device->dev, true); |
3fb02738 | 1679 | } |
1da177e4 | 1680 | |
cee324b1 | 1681 | if ((acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON) == 0) { |
5c478f49 | 1682 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1683 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
209d3b17 | 1684 | ACPI_STA_DEFAULT, true); |
3fb02738 | 1685 | } |
1da177e4 | 1686 | |
d550d98d | 1687 | return result; |
1da177e4 LT |
1688 | } |
1689 | ||
e747f274 | 1690 | int __init acpi_scan_init(void) |
1da177e4 LT |
1691 | { |
1692 | int result; | |
1da177e4 | 1693 | |
5b327265 PM |
1694 | result = bus_register(&acpi_bus_type); |
1695 | if (result) { | |
1696 | /* We don't want to quit even if we failed to add suspend/resume */ | |
1697 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
1698 | } | |
1699 | ||
97d9a9e9 | 1700 | acpi_power_init(); |
92ef2a25 | 1701 | acpi_pci_root_init(); |
97d9a9e9 | 1702 | |
1da177e4 LT |
1703 | /* |
1704 | * Enumerate devices in the ACPI namespace. | |
1705 | */ | |
0cd6ac52 RW |
1706 | result = acpi_bus_scan(ACPI_ROOT_OBJECT); |
1707 | if (result) | |
1708 | return result; | |
c04209a7 | 1709 | |
0cd6ac52 | 1710 | result = acpi_bus_get_device(ACPI_ROOT_OBJECT, &acpi_root); |
c4168bff | 1711 | if (!result) |
adc08e20 | 1712 | result = acpi_bus_scan_fixed(); |
1da177e4 LT |
1713 | |
1714 | if (result) | |
b17b537a | 1715 | acpi_device_unregister(acpi_root); |
a2100801 | 1716 | else |
3a37898d | 1717 | acpi_update_all_gpes(); |
1da177e4 | 1718 | |
d550d98d | 1719 | return result; |
1da177e4 | 1720 | } |