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; |
26d46867 | 119 | struct acpi_device *device; |
c4753e57 | 120 | acpi_handle handle = ej_event->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 | if (acpi_bus_get_device(handle, &device)) |
c4753e57 | 128 | goto err_out; |
26d46867 ZR |
129 | |
130 | if (!device) | |
c4753e57 | 131 | goto err_out; |
26d46867 ZR |
132 | |
133 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
0794469d | 134 | "Hot-removing device %s...\n", dev_name(&device->dev))); |
26d46867 | 135 | |
ae281795 | 136 | if (acpi_bus_trim(device)) { |
55ac9a01 LM |
137 | printk(KERN_ERR PREFIX |
138 | "Removing device failed\n"); | |
c4753e57 | 139 | goto err_out; |
26d46867 | 140 | } |
1da177e4 | 141 | |
b3c450c3 TK |
142 | /* device has been freed */ |
143 | device = NULL; | |
144 | ||
26d46867 ZR |
145 | /* power off device */ |
146 | status = acpi_evaluate_object(handle, "_PS3", NULL, NULL); | |
147 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) | |
55ac9a01 LM |
148 | printk(KERN_WARNING PREFIX |
149 | "Power-off device failed\n"); | |
26d46867 | 150 | |
b3c450c3 | 151 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_LCK", &temp))) { |
1da177e4 LT |
152 | arg_list.count = 1; |
153 | arg_list.pointer = &arg; | |
154 | arg.type = ACPI_TYPE_INTEGER; | |
155 | arg.integer.value = 0; | |
156 | acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); | |
157 | } | |
1da177e4 | 158 | |
1da177e4 LT |
159 | arg_list.count = 1; |
160 | arg_list.pointer = &arg; | |
161 | arg.type = ACPI_TYPE_INTEGER; | |
162 | arg.integer.value = 1; | |
1da177e4 | 163 | |
1da177e4 LT |
164 | /* |
165 | * TBD: _EJD support. | |
166 | */ | |
1da177e4 | 167 | status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); |
c4753e57 TK |
168 | if (ACPI_FAILURE(status)) { |
169 | if (status != AE_NOT_FOUND) | |
170 | printk(KERN_WARNING PREFIX | |
171 | "Eject device failed\n"); | |
172 | goto err_out; | |
173 | } | |
1da177e4 | 174 | |
c4753e57 TK |
175 | kfree(context); |
176 | return; | |
1da177e4 | 177 | |
c4753e57 TK |
178 | err_out: |
179 | /* Inform firmware the hot-remove operation has completed w/ error */ | |
180 | (void) acpi_evaluate_hotplug_ost(handle, | |
181 | ej_event->event, ost_code, NULL); | |
182 | kfree(context); | |
c8d72a5e | 183 | return; |
1da177e4 | 184 | } |
61622acc | 185 | EXPORT_SYMBOL(acpi_bus_hot_remove_device); |
1da177e4 | 186 | |
1da177e4 | 187 | static ssize_t |
f883d9db PM |
188 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
189 | const char *buf, size_t count) | |
1da177e4 | 190 | { |
4be44fcd | 191 | int ret = count; |
4be44fcd | 192 | acpi_status status; |
4be44fcd | 193 | acpi_object_type type = 0; |
f883d9db | 194 | struct acpi_device *acpi_device = to_acpi_device(d); |
c4753e57 | 195 | struct acpi_eject_event *ej_event; |
1da177e4 | 196 | |
1da177e4 LT |
197 | if ((!count) || (buf[0] != '1')) { |
198 | return -EINVAL; | |
199 | } | |
1da177e4 | 200 | #ifndef FORCE_EJECT |
f883d9db | 201 | if (acpi_device->driver == NULL) { |
1da177e4 LT |
202 | ret = -ENODEV; |
203 | goto err; | |
204 | } | |
205 | #endif | |
f883d9db PM |
206 | status = acpi_get_type(acpi_device->handle, &type); |
207 | if (ACPI_FAILURE(status) || (!acpi_device->flags.ejectable)) { | |
1da177e4 LT |
208 | ret = -ENODEV; |
209 | goto err; | |
210 | } | |
1da177e4 | 211 | |
c4753e57 TK |
212 | ej_event = kmalloc(sizeof(*ej_event), GFP_KERNEL); |
213 | if (!ej_event) { | |
214 | ret = -ENOMEM; | |
215 | goto err; | |
216 | } | |
217 | ||
218 | ej_event->handle = acpi_device->handle; | |
219 | if (acpi_device->flags.eject_pending) { | |
220 | /* event originated from ACPI eject notification */ | |
221 | ej_event->event = ACPI_NOTIFY_EJECT_REQUEST; | |
222 | acpi_device->flags.eject_pending = 0; | |
223 | } else { | |
224 | /* event originated from user */ | |
225 | ej_event->event = ACPI_OST_EC_OSPM_EJECT; | |
226 | (void) acpi_evaluate_hotplug_ost(ej_event->handle, | |
227 | ej_event->event, ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); | |
228 | } | |
229 | ||
230 | acpi_os_hotplug_execute(acpi_bus_hot_remove_device, (void *)ej_event); | |
74523c90 | 231 | err: |
1da177e4 | 232 | return ret; |
1da177e4 LT |
233 | } |
234 | ||
f883d9db | 235 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
1da177e4 | 236 | |
e49bd2dd ZR |
237 | static ssize_t |
238 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
239 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1da177e4 | 240 | |
ea8d82fd | 241 | return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev)); |
1da177e4 | 242 | } |
e49bd2dd | 243 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
1da177e4 | 244 | |
923d4a45 LZ |
245 | static ssize_t acpi_device_uid_show(struct device *dev, |
246 | struct device_attribute *attr, char *buf) | |
247 | { | |
248 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
249 | ||
250 | return sprintf(buf, "%s\n", acpi_dev->pnp.unique_id); | |
251 | } | |
252 | static DEVICE_ATTR(uid, 0444, acpi_device_uid_show, NULL); | |
253 | ||
254 | static ssize_t acpi_device_adr_show(struct device *dev, | |
255 | struct device_attribute *attr, char *buf) | |
256 | { | |
257 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
258 | ||
259 | return sprintf(buf, "0x%08x\n", | |
260 | (unsigned int)(acpi_dev->pnp.bus_address)); | |
261 | } | |
262 | static DEVICE_ATTR(adr, 0444, acpi_device_adr_show, NULL); | |
263 | ||
e49bd2dd ZR |
264 | static ssize_t |
265 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
266 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
267 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
268 | int result; | |
1da177e4 | 269 | |
e49bd2dd | 270 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
0c526d96 | 271 | if (result) |
e49bd2dd | 272 | goto end; |
1da177e4 | 273 | |
e49bd2dd ZR |
274 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
275 | kfree(path.pointer); | |
0c526d96 | 276 | end: |
e49bd2dd | 277 | return result; |
1da177e4 | 278 | } |
e49bd2dd | 279 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
1da177e4 | 280 | |
d1efe3c3 LO |
281 | /* sysfs file that shows description text from the ACPI _STR method */ |
282 | static ssize_t description_show(struct device *dev, | |
283 | struct device_attribute *attr, | |
284 | char *buf) { | |
285 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
286 | int result; | |
287 | ||
288 | if (acpi_dev->pnp.str_obj == NULL) | |
289 | return 0; | |
290 | ||
291 | /* | |
292 | * The _STR object contains a Unicode identifier for a device. | |
293 | * We need to convert to utf-8 so it can be displayed. | |
294 | */ | |
295 | result = utf16s_to_utf8s( | |
296 | (wchar_t *)acpi_dev->pnp.str_obj->buffer.pointer, | |
297 | acpi_dev->pnp.str_obj->buffer.length, | |
298 | UTF16_LITTLE_ENDIAN, buf, | |
299 | PAGE_SIZE); | |
300 | ||
301 | buf[result++] = '\n'; | |
302 | ||
303 | return result; | |
304 | } | |
305 | static DEVICE_ATTR(description, 0444, description_show, NULL); | |
306 | ||
bb74ac23 YI |
307 | static ssize_t |
308 | acpi_device_sun_show(struct device *dev, struct device_attribute *attr, | |
309 | char *buf) { | |
310 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
311 | ||
312 | return sprintf(buf, "%lu\n", acpi_dev->pnp.sun); | |
313 | } | |
314 | static DEVICE_ATTR(sun, 0444, acpi_device_sun_show, NULL); | |
315 | ||
e49bd2dd | 316 | static int acpi_device_setup_files(struct acpi_device *dev) |
1da177e4 | 317 | { |
d1efe3c3 | 318 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
f883d9db PM |
319 | acpi_status status; |
320 | acpi_handle temp; | |
bb74ac23 | 321 | unsigned long long sun; |
e49bd2dd | 322 | int result = 0; |
1da177e4 LT |
323 | |
324 | /* | |
e49bd2dd | 325 | * Devices gotten from FADT don't have a "path" attribute |
1da177e4 | 326 | */ |
0c526d96 | 327 | if (dev->handle) { |
e49bd2dd | 328 | result = device_create_file(&dev->dev, &dev_attr_path); |
0c526d96 | 329 | if (result) |
e49bd2dd | 330 | goto end; |
1da177e4 LT |
331 | } |
332 | ||
2b2ae7c7 TR |
333 | if (!list_empty(&dev->pnp.ids)) { |
334 | result = device_create_file(&dev->dev, &dev_attr_hid); | |
335 | if (result) | |
336 | goto end; | |
1da177e4 | 337 | |
2b2ae7c7 TR |
338 | result = device_create_file(&dev->dev, &dev_attr_modalias); |
339 | if (result) | |
340 | goto end; | |
341 | } | |
29b71a1c | 342 | |
d1efe3c3 LO |
343 | /* |
344 | * If device has _STR, 'description' file is created | |
345 | */ | |
346 | status = acpi_get_handle(dev->handle, "_STR", &temp); | |
347 | if (ACPI_SUCCESS(status)) { | |
348 | status = acpi_evaluate_object(dev->handle, "_STR", | |
349 | NULL, &buffer); | |
350 | if (ACPI_FAILURE(status)) | |
351 | buffer.pointer = NULL; | |
352 | dev->pnp.str_obj = buffer.pointer; | |
353 | result = device_create_file(&dev->dev, &dev_attr_description); | |
354 | if (result) | |
355 | goto end; | |
356 | } | |
357 | ||
923d4a45 LZ |
358 | if (dev->flags.bus_address) |
359 | result = device_create_file(&dev->dev, &dev_attr_adr); | |
360 | if (dev->pnp.unique_id) | |
361 | result = device_create_file(&dev->dev, &dev_attr_uid); | |
362 | ||
bb74ac23 YI |
363 | status = acpi_evaluate_integer(dev->handle, "_SUN", NULL, &sun); |
364 | if (ACPI_SUCCESS(status)) { | |
365 | dev->pnp.sun = (unsigned long)sun; | |
366 | result = device_create_file(&dev->dev, &dev_attr_sun); | |
367 | if (result) | |
368 | goto end; | |
369 | } else { | |
370 | dev->pnp.sun = (unsigned long)-1; | |
371 | } | |
372 | ||
e49bd2dd ZR |
373 | /* |
374 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
375 | * hot-removal function from userland. | |
376 | */ | |
f883d9db PM |
377 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); |
378 | if (ACPI_SUCCESS(status)) | |
e49bd2dd | 379 | result = device_create_file(&dev->dev, &dev_attr_eject); |
0c526d96 | 380 | end: |
e49bd2dd | 381 | return result; |
1da177e4 LT |
382 | } |
383 | ||
f883d9db | 384 | static void acpi_device_remove_files(struct acpi_device *dev) |
1da177e4 | 385 | { |
f883d9db PM |
386 | acpi_status status; |
387 | acpi_handle temp; | |
1da177e4 | 388 | |
f883d9db | 389 | /* |
d1efe3c3 LO |
390 | * If device has _STR, remove 'description' file |
391 | */ | |
392 | status = acpi_get_handle(dev->handle, "_STR", &temp); | |
393 | if (ACPI_SUCCESS(status)) { | |
394 | kfree(dev->pnp.str_obj); | |
395 | device_remove_file(&dev->dev, &dev_attr_description); | |
396 | } | |
397 | /* | |
398 | * If device has _EJ0, remove 'eject' file. | |
f883d9db PM |
399 | */ |
400 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); | |
401 | if (ACPI_SUCCESS(status)) | |
402 | device_remove_file(&dev->dev, &dev_attr_eject); | |
1da177e4 | 403 | |
bb74ac23 YI |
404 | status = acpi_get_handle(dev->handle, "_SUN", &temp); |
405 | if (ACPI_SUCCESS(status)) | |
406 | device_remove_file(&dev->dev, &dev_attr_sun); | |
407 | ||
923d4a45 LZ |
408 | if (dev->pnp.unique_id) |
409 | device_remove_file(&dev->dev, &dev_attr_uid); | |
410 | if (dev->flags.bus_address) | |
411 | device_remove_file(&dev->dev, &dev_attr_adr); | |
1131b938 BH |
412 | device_remove_file(&dev->dev, &dev_attr_modalias); |
413 | device_remove_file(&dev->dev, &dev_attr_hid); | |
0c526d96 | 414 | if (dev->handle) |
e49bd2dd | 415 | device_remove_file(&dev->dev, &dev_attr_path); |
1da177e4 | 416 | } |
1da177e4 | 417 | /* -------------------------------------------------------------------------- |
9e89dde2 | 418 | ACPI Bus operations |
1da177e4 | 419 | -------------------------------------------------------------------------- */ |
29b71a1c | 420 | |
cf761af9 MW |
421 | static const struct acpi_device_id *__acpi_match_device( |
422 | struct acpi_device *device, const struct acpi_device_id *ids) | |
29b71a1c TR |
423 | { |
424 | const struct acpi_device_id *id; | |
7f47fa6c | 425 | struct acpi_hardware_id *hwid; |
29b71a1c | 426 | |
39a0ad87 ZY |
427 | /* |
428 | * If the device is not present, it is unnecessary to load device | |
429 | * driver for it. | |
430 | */ | |
431 | if (!device->status.present) | |
cf761af9 | 432 | return NULL; |
39a0ad87 | 433 | |
7f47fa6c BH |
434 | for (id = ids; id->id[0]; id++) |
435 | list_for_each_entry(hwid, &device->pnp.ids, list) | |
436 | if (!strcmp((char *) id->id, hwid->id)) | |
cf761af9 MW |
437 | return id; |
438 | ||
439 | return NULL; | |
440 | } | |
441 | ||
442 | /** | |
443 | * acpi_match_device - Match a struct device against a given list of ACPI IDs | |
444 | * @ids: Array of struct acpi_device_id object to match against. | |
445 | * @dev: The device structure to match. | |
446 | * | |
447 | * Check if @dev has a valid ACPI handle and if there is a struct acpi_device | |
448 | * object for that handle and use that object to match against a given list of | |
449 | * device IDs. | |
450 | * | |
451 | * Return a pointer to the first matching ID on success or %NULL on failure. | |
452 | */ | |
453 | const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids, | |
454 | const struct device *dev) | |
455 | { | |
456 | struct acpi_device *adev; | |
457 | ||
95f8a082 RW |
458 | if (!ids || !ACPI_HANDLE(dev) |
459 | || ACPI_FAILURE(acpi_bus_get_device(ACPI_HANDLE(dev), &adev))) | |
cf761af9 MW |
460 | return NULL; |
461 | ||
462 | return __acpi_match_device(adev, ids); | |
463 | } | |
464 | EXPORT_SYMBOL_GPL(acpi_match_device); | |
29b71a1c | 465 | |
cf761af9 MW |
466 | int acpi_match_device_ids(struct acpi_device *device, |
467 | const struct acpi_device_id *ids) | |
468 | { | |
469 | return __acpi_match_device(device, ids) ? 0 : -ENOENT; | |
29b71a1c TR |
470 | } |
471 | EXPORT_SYMBOL(acpi_match_device_ids); | |
472 | ||
7f47fa6c BH |
473 | static void acpi_free_ids(struct acpi_device *device) |
474 | { | |
475 | struct acpi_hardware_id *id, *tmp; | |
476 | ||
477 | list_for_each_entry_safe(id, tmp, &device->pnp.ids, list) { | |
478 | kfree(id->id); | |
479 | kfree(id); | |
480 | } | |
481 | } | |
482 | ||
1890a97a | 483 | static void acpi_device_release(struct device *dev) |
1da177e4 | 484 | { |
1890a97a | 485 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 486 | |
7f47fa6c | 487 | acpi_free_ids(acpi_dev); |
ccf78040 | 488 | kfree(acpi_dev->pnp.unique_id); |
1890a97a | 489 | kfree(acpi_dev); |
1da177e4 LT |
490 | } |
491 | ||
5d9464a4 | 492 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 493 | { |
5d9464a4 PM |
494 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
495 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
1da177e4 | 496 | |
209d3b17 | 497 | return acpi_dev->flags.match_driver |
805d410f | 498 | && !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
5d9464a4 | 499 | } |
1da177e4 | 500 | |
7eff2e7a | 501 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 | 502 | { |
5d9464a4 | 503 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
7eff2e7a | 504 | int len; |
5d9464a4 | 505 | |
2b2ae7c7 TR |
506 | if (list_empty(&acpi_dev->pnp.ids)) |
507 | return 0; | |
508 | ||
7eff2e7a KS |
509 | if (add_uevent_var(env, "MODALIAS=")) |
510 | return -ENOMEM; | |
511 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], | |
512 | sizeof(env->buf) - env->buflen); | |
513 | if (len >= (sizeof(env->buf) - env->buflen)) | |
514 | return -ENOMEM; | |
515 | env->buflen += len; | |
9e89dde2 | 516 | return 0; |
1da177e4 LT |
517 | } |
518 | ||
46ec8598 BH |
519 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
520 | { | |
521 | struct acpi_device *device = data; | |
522 | ||
523 | device->driver->ops.notify(device, event); | |
524 | } | |
525 | ||
526 | static acpi_status acpi_device_notify_fixed(void *data) | |
527 | { | |
528 | struct acpi_device *device = data; | |
529 | ||
53de5356 BH |
530 | /* Fixed hardware devices have no handles */ |
531 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); | |
46ec8598 BH |
532 | return AE_OK; |
533 | } | |
534 | ||
535 | static int acpi_device_install_notify_handler(struct acpi_device *device) | |
536 | { | |
537 | acpi_status status; | |
46ec8598 | 538 | |
ccba2a36 | 539 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
540 | status = |
541 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
542 | acpi_device_notify_fixed, | |
543 | device); | |
ccba2a36 | 544 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
545 | status = |
546 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
547 | acpi_device_notify_fixed, | |
548 | device); | |
549 | else | |
550 | status = acpi_install_notify_handler(device->handle, | |
551 | ACPI_DEVICE_NOTIFY, | |
552 | acpi_device_notify, | |
553 | device); | |
554 | ||
555 | if (ACPI_FAILURE(status)) | |
556 | return -EINVAL; | |
557 | return 0; | |
558 | } | |
559 | ||
560 | static void acpi_device_remove_notify_handler(struct acpi_device *device) | |
561 | { | |
ccba2a36 | 562 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
563 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, |
564 | acpi_device_notify_fixed); | |
ccba2a36 | 565 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
566 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, |
567 | acpi_device_notify_fixed); | |
568 | else | |
569 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, | |
570 | acpi_device_notify); | |
571 | } | |
572 | ||
5d9464a4 | 573 | static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *); |
5d9464a4 | 574 | static int acpi_device_probe(struct device * dev) |
1da177e4 | 575 | { |
5d9464a4 PM |
576 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
577 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
578 | int ret; | |
579 | ||
580 | ret = acpi_bus_driver_init(acpi_dev, acpi_drv); | |
581 | if (!ret) { | |
46ec8598 BH |
582 | if (acpi_drv->ops.notify) { |
583 | ret = acpi_device_install_notify_handler(acpi_dev); | |
584 | if (ret) { | |
46ec8598 BH |
585 | if (acpi_drv->ops.remove) |
586 | acpi_drv->ops.remove(acpi_dev, | |
587 | acpi_dev->removal_type); | |
588 | return ret; | |
589 | } | |
590 | } | |
591 | ||
5d9464a4 PM |
592 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
593 | "Found driver [%s] for device [%s]\n", | |
594 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
595 | get_device(dev); | |
596 | } | |
597 | return ret; | |
598 | } | |
1da177e4 | 599 | |
5d9464a4 PM |
600 | static int acpi_device_remove(struct device * dev) |
601 | { | |
602 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
603 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
604 | ||
605 | if (acpi_drv) { | |
46ec8598 BH |
606 | if (acpi_drv->ops.notify) |
607 | acpi_device_remove_notify_handler(acpi_dev); | |
5d9464a4 | 608 | if (acpi_drv->ops.remove) |
96333578 | 609 | acpi_drv->ops.remove(acpi_dev, acpi_dev->removal_type); |
1da177e4 | 610 | } |
5d9464a4 | 611 | acpi_dev->driver = NULL; |
db89b4f0 | 612 | acpi_dev->driver_data = NULL; |
1da177e4 | 613 | |
5d9464a4 | 614 | put_device(dev); |
9e89dde2 ZR |
615 | return 0; |
616 | } | |
1da177e4 | 617 | |
55955aad | 618 | struct bus_type acpi_bus_type = { |
9e89dde2 | 619 | .name = "acpi", |
5d9464a4 PM |
620 | .match = acpi_bus_match, |
621 | .probe = acpi_device_probe, | |
622 | .remove = acpi_device_remove, | |
623 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
624 | }; |
625 | ||
66b7ed40 | 626 | static int acpi_device_register(struct acpi_device *device) |
1da177e4 | 627 | { |
4be44fcd | 628 | int result; |
e49bd2dd ZR |
629 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
630 | int found = 0; | |
66b7ed40 | 631 | |
9e89dde2 ZR |
632 | /* |
633 | * Linkage | |
634 | * ------- | |
635 | * Link this device to its parent and siblings. | |
636 | */ | |
637 | INIT_LIST_HEAD(&device->children); | |
638 | INIT_LIST_HEAD(&device->node); | |
9e89dde2 | 639 | INIT_LIST_HEAD(&device->wakeup_list); |
1033f904 LT |
640 | INIT_LIST_HEAD(&device->physical_node_list); |
641 | mutex_init(&device->physical_node_lock); | |
1da177e4 | 642 | |
e49bd2dd ZR |
643 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
644 | if (!new_bus_id) { | |
645 | printk(KERN_ERR PREFIX "Memory allocation error\n"); | |
646 | return -ENOMEM; | |
1da177e4 | 647 | } |
e49bd2dd | 648 | |
9090589d | 649 | mutex_lock(&acpi_device_lock); |
e49bd2dd ZR |
650 | /* |
651 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
652 | * If failed, create one and link it into acpi_bus_id_list | |
653 | */ | |
654 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
1131b938 BH |
655 | if (!strcmp(acpi_device_bus_id->bus_id, |
656 | acpi_device_hid(device))) { | |
657 | acpi_device_bus_id->instance_no++; | |
e49bd2dd ZR |
658 | found = 1; |
659 | kfree(new_bus_id); | |
660 | break; | |
661 | } | |
1da177e4 | 662 | } |
0c526d96 | 663 | if (!found) { |
e49bd2dd | 664 | acpi_device_bus_id = new_bus_id; |
1131b938 | 665 | strcpy(acpi_device_bus_id->bus_id, acpi_device_hid(device)); |
e49bd2dd ZR |
666 | acpi_device_bus_id->instance_no = 0; |
667 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 668 | } |
0794469d | 669 | dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 670 | |
33b57150 | 671 | if (device->parent) |
9e89dde2 | 672 | list_add_tail(&device->node, &device->parent->children); |
33b57150 | 673 | |
9e89dde2 ZR |
674 | if (device->wakeup.flags.valid) |
675 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
9090589d | 676 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 677 | |
1890a97a | 678 | if (device->parent) |
66b7ed40 | 679 | device->dev.parent = &device->parent->dev; |
1890a97a | 680 | device->dev.bus = &acpi_bus_type; |
1890a97a | 681 | device->dev.release = &acpi_device_release; |
8b12b922 | 682 | result = device_register(&device->dev); |
0c526d96 | 683 | if (result) { |
8b12b922 | 684 | dev_err(&device->dev, "Error registering device\n"); |
e49bd2dd | 685 | goto end; |
1da177e4 | 686 | } |
1da177e4 | 687 | |
e49bd2dd | 688 | result = acpi_device_setup_files(device); |
0c526d96 | 689 | if (result) |
0794469d KS |
690 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
691 | dev_name(&device->dev)); | |
1da177e4 | 692 | |
96333578 | 693 | device->removal_type = ACPI_BUS_REMOVAL_NORMAL; |
1da177e4 | 694 | return 0; |
0c526d96 | 695 | end: |
9090589d | 696 | mutex_lock(&acpi_device_lock); |
33b57150 | 697 | if (device->parent) |
e49bd2dd | 698 | list_del(&device->node); |
e49bd2dd | 699 | list_del(&device->wakeup_list); |
9090589d | 700 | mutex_unlock(&acpi_device_lock); |
e49bd2dd | 701 | return result; |
1da177e4 LT |
702 | } |
703 | ||
b17b537a | 704 | static void acpi_device_unregister(struct acpi_device *device) |
9e89dde2 | 705 | { |
9090589d | 706 | mutex_lock(&acpi_device_lock); |
33b57150 | 707 | if (device->parent) |
9e89dde2 | 708 | list_del(&device->node); |
1da177e4 | 709 | |
9e89dde2 | 710 | list_del(&device->wakeup_list); |
9090589d | 711 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 712 | |
9e89dde2 | 713 | acpi_detach_data(device->handle, acpi_bus_data_handler); |
1890a97a | 714 | |
f883d9db | 715 | acpi_device_remove_files(device); |
1890a97a | 716 | device_unregister(&device->dev); |
1da177e4 LT |
717 | } |
718 | ||
9e89dde2 ZR |
719 | /* -------------------------------------------------------------------------- |
720 | Driver Management | |
721 | -------------------------------------------------------------------------- */ | |
1da177e4 | 722 | /** |
d758a8fa RD |
723 | * acpi_bus_driver_init - add a device to a driver |
724 | * @device: the device to add and initialize | |
725 | * @driver: driver for the device | |
726 | * | |
0c526d96 | 727 | * Used to initialize a device via its device driver. Called whenever a |
1890a97a | 728 | * driver is bound to a device. Invokes the driver's add() ops. |
1da177e4 LT |
729 | */ |
730 | static int | |
4be44fcd | 731 | acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) |
1da177e4 | 732 | { |
4be44fcd | 733 | int result = 0; |
1da177e4 | 734 | |
1da177e4 | 735 | if (!device || !driver) |
d550d98d | 736 | return -EINVAL; |
1da177e4 LT |
737 | |
738 | if (!driver->ops.add) | |
d550d98d | 739 | return -ENOSYS; |
1da177e4 LT |
740 | |
741 | result = driver->ops.add(device); | |
742 | if (result) { | |
743 | device->driver = NULL; | |
db89b4f0 | 744 | device->driver_data = NULL; |
d550d98d | 745 | return result; |
1da177e4 LT |
746 | } |
747 | ||
748 | device->driver = driver; | |
749 | ||
750 | /* | |
751 | * TBD - Configuration Management: Assign resources to device based | |
752 | * upon possible configuration and currently allocated resources. | |
753 | */ | |
754 | ||
4be44fcd LB |
755 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
756 | "Driver successfully bound to device\n")); | |
d550d98d | 757 | return 0; |
3fb02738 RS |
758 | } |
759 | ||
9e89dde2 ZR |
760 | /** |
761 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
762 | * @driver: driver being registered | |
763 | * | |
764 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
765 | * devices that match the driver's criteria and binds. Returns zero for | |
766 | * success or a negative error status for failure. | |
767 | */ | |
768 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
1da177e4 | 769 | { |
1890a97a | 770 | int ret; |
1da177e4 | 771 | |
9e89dde2 ZR |
772 | if (acpi_disabled) |
773 | return -ENODEV; | |
1890a97a PM |
774 | driver->drv.name = driver->name; |
775 | driver->drv.bus = &acpi_bus_type; | |
776 | driver->drv.owner = driver->owner; | |
1da177e4 | 777 | |
1890a97a PM |
778 | ret = driver_register(&driver->drv); |
779 | return ret; | |
9e89dde2 | 780 | } |
1da177e4 | 781 | |
9e89dde2 ZR |
782 | EXPORT_SYMBOL(acpi_bus_register_driver); |
783 | ||
784 | /** | |
785 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus | |
786 | * @driver: driver to unregister | |
787 | * | |
788 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
789 | * devices that match the driver's criteria and unbinds. | |
790 | */ | |
791 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
792 | { | |
1890a97a | 793 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
794 | } |
795 | ||
796 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
797 | ||
9e89dde2 ZR |
798 | /* -------------------------------------------------------------------------- |
799 | Device Enumeration | |
800 | -------------------------------------------------------------------------- */ | |
5c478f49 BH |
801 | static struct acpi_device *acpi_bus_get_parent(acpi_handle handle) |
802 | { | |
803 | acpi_status status; | |
804 | int ret; | |
805 | struct acpi_device *device; | |
806 | ||
807 | /* | |
808 | * Fixed hardware devices do not appear in the namespace and do not | |
809 | * have handles, but we fabricate acpi_devices for them, so we have | |
810 | * to deal with them specially. | |
811 | */ | |
812 | if (handle == NULL) | |
813 | return acpi_root; | |
814 | ||
815 | do { | |
816 | status = acpi_get_parent(handle, &handle); | |
817 | if (status == AE_NULL_ENTRY) | |
818 | return NULL; | |
819 | if (ACPI_FAILURE(status)) | |
820 | return acpi_root; | |
821 | ||
822 | ret = acpi_bus_get_device(handle, &device); | |
823 | if (ret == 0) | |
824 | return device; | |
825 | } while (1); | |
826 | } | |
827 | ||
9e89dde2 ZR |
828 | acpi_status |
829 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
830 | { | |
831 | acpi_status status; | |
832 | acpi_handle tmp; | |
833 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
834 | union acpi_object *obj; | |
835 | ||
836 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
837 | if (ACPI_FAILURE(status)) | |
838 | return status; | |
839 | ||
840 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
841 | if (ACPI_SUCCESS(status)) { | |
842 | obj = buffer.pointer; | |
3b5fee59 HM |
843 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
844 | ejd); | |
9e89dde2 ZR |
845 | kfree(buffer.pointer); |
846 | } | |
847 | return status; | |
848 | } | |
849 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
850 | ||
8e4319c4 | 851 | void acpi_bus_data_handler(acpi_handle handle, void *context) |
9e89dde2 ZR |
852 | { |
853 | ||
854 | /* TBD */ | |
855 | ||
856 | return; | |
857 | } | |
858 | ||
9e89dde2 ZR |
859 | static int acpi_bus_get_perf_flags(struct acpi_device *device) |
860 | { | |
861 | device->performance.state = ACPI_STATE_UNKNOWN; | |
862 | return 0; | |
863 | } | |
864 | ||
865 | static acpi_status | |
b581a7f9 RW |
866 | acpi_bus_extract_wakeup_device_power_package(acpi_handle handle, |
867 | struct acpi_device_wakeup *wakeup) | |
9e89dde2 | 868 | { |
b581a7f9 RW |
869 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
870 | union acpi_object *package = NULL; | |
9e89dde2 | 871 | union acpi_object *element = NULL; |
b581a7f9 RW |
872 | acpi_status status; |
873 | int i = 0; | |
9e89dde2 | 874 | |
b581a7f9 | 875 | if (!wakeup) |
9e89dde2 ZR |
876 | return AE_BAD_PARAMETER; |
877 | ||
b581a7f9 RW |
878 | /* _PRW */ |
879 | status = acpi_evaluate_object(handle, "_PRW", NULL, &buffer); | |
880 | if (ACPI_FAILURE(status)) { | |
881 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
882 | return status; | |
883 | } | |
884 | ||
885 | package = (union acpi_object *)buffer.pointer; | |
886 | ||
887 | if (!package || (package->package.count < 2)) { | |
888 | status = AE_BAD_DATA; | |
889 | goto out; | |
890 | } | |
891 | ||
9e89dde2 | 892 | element = &(package->package.elements[0]); |
b581a7f9 RW |
893 | if (!element) { |
894 | status = AE_BAD_DATA; | |
895 | goto out; | |
896 | } | |
9e89dde2 ZR |
897 | if (element->type == ACPI_TYPE_PACKAGE) { |
898 | if ((element->package.count < 2) || | |
899 | (element->package.elements[0].type != | |
900 | ACPI_TYPE_LOCAL_REFERENCE) | |
b581a7f9 RW |
901 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) { |
902 | status = AE_BAD_DATA; | |
903 | goto out; | |
904 | } | |
905 | wakeup->gpe_device = | |
9e89dde2 | 906 | element->package.elements[0].reference.handle; |
b581a7f9 | 907 | wakeup->gpe_number = |
9e89dde2 ZR |
908 | (u32) element->package.elements[1].integer.value; |
909 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
b581a7f9 RW |
910 | wakeup->gpe_device = NULL; |
911 | wakeup->gpe_number = element->integer.value; | |
912 | } else { | |
913 | status = AE_BAD_DATA; | |
914 | goto out; | |
915 | } | |
9e89dde2 ZR |
916 | |
917 | element = &(package->package.elements[1]); | |
918 | if (element->type != ACPI_TYPE_INTEGER) { | |
b581a7f9 RW |
919 | status = AE_BAD_DATA; |
920 | goto out; | |
9e89dde2 | 921 | } |
b581a7f9 | 922 | wakeup->sleep_state = element->integer.value; |
9e89dde2 ZR |
923 | |
924 | if ((package->package.count - 2) > ACPI_MAX_HANDLES) { | |
b581a7f9 RW |
925 | status = AE_NO_MEMORY; |
926 | goto out; | |
9e89dde2 | 927 | } |
b581a7f9 RW |
928 | wakeup->resources.count = package->package.count - 2; |
929 | for (i = 0; i < wakeup->resources.count; i++) { | |
9e89dde2 | 930 | element = &(package->package.elements[i + 2]); |
b581a7f9 RW |
931 | if (element->type != ACPI_TYPE_LOCAL_REFERENCE) { |
932 | status = AE_BAD_DATA; | |
933 | goto out; | |
934 | } | |
9e89dde2 | 935 | |
b581a7f9 | 936 | wakeup->resources.handles[i] = element->reference.handle; |
1da177e4 | 937 | } |
9e89dde2 | 938 | |
bba63a29 | 939 | acpi_setup_gpe_for_wake(handle, wakeup->gpe_device, wakeup->gpe_number); |
9874647b | 940 | |
b581a7f9 RW |
941 | out: |
942 | kfree(buffer.pointer); | |
943 | ||
944 | return status; | |
1da177e4 LT |
945 | } |
946 | ||
f517709d | 947 | static void acpi_bus_set_run_wake_flags(struct acpi_device *device) |
1da177e4 | 948 | { |
29b71a1c | 949 | struct acpi_device_id button_device_ids[] = { |
29b71a1c | 950 | {"PNP0C0C", 0}, |
b7e38304 | 951 | {"PNP0C0D", 0}, |
29b71a1c TR |
952 | {"PNP0C0E", 0}, |
953 | {"", 0}, | |
954 | }; | |
f517709d RW |
955 | acpi_status status; |
956 | acpi_event_status event_status; | |
957 | ||
b67ea761 | 958 | device->wakeup.flags.notifier_present = 0; |
f517709d RW |
959 | |
960 | /* Power button, Lid switch always enable wakeup */ | |
961 | if (!acpi_match_device_ids(device, button_device_ids)) { | |
962 | device->wakeup.flags.run_wake = 1; | |
b7e38304 ZR |
963 | if (!acpi_match_device_ids(device, &button_device_ids[1])) { |
964 | /* Do not use Lid/sleep button for S5 wakeup */ | |
965 | if (device->wakeup.sleep_state == ACPI_STATE_S5) | |
966 | device->wakeup.sleep_state = ACPI_STATE_S4; | |
967 | } | |
f2b56bc8 | 968 | device_set_wakeup_capable(&device->dev, true); |
f517709d RW |
969 | return; |
970 | } | |
971 | ||
e8e18c95 RW |
972 | status = acpi_get_gpe_status(device->wakeup.gpe_device, |
973 | device->wakeup.gpe_number, | |
974 | &event_status); | |
f517709d RW |
975 | if (status == AE_OK) |
976 | device->wakeup.flags.run_wake = | |
977 | !!(event_status & ACPI_EVENT_FLAG_HANDLE); | |
978 | } | |
979 | ||
d57d09a4 | 980 | static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
f517709d | 981 | { |
d57d09a4 | 982 | acpi_handle temp; |
f517709d | 983 | acpi_status status = 0; |
f517709d | 984 | int psw_error; |
29b71a1c | 985 | |
d57d09a4 RW |
986 | /* Presence of _PRW indicates wake capable */ |
987 | status = acpi_get_handle(device->handle, "_PRW", &temp); | |
988 | if (ACPI_FAILURE(status)) | |
989 | return; | |
990 | ||
b581a7f9 RW |
991 | status = acpi_bus_extract_wakeup_device_power_package(device->handle, |
992 | &device->wakeup); | |
9e89dde2 ZR |
993 | if (ACPI_FAILURE(status)) { |
994 | ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package")); | |
d57d09a4 | 995 | return; |
9e89dde2 | 996 | } |
1da177e4 | 997 | |
9e89dde2 | 998 | device->wakeup.flags.valid = 1; |
9b83ccd2 | 999 | device->wakeup.prepare_count = 0; |
f517709d | 1000 | acpi_bus_set_run_wake_flags(device); |
729b2bdb ZY |
1001 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
1002 | * system for the ACPI device with the _PRW object. | |
1003 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. | |
1004 | * So it is necessary to call _DSW object first. Only when it is not | |
1005 | * present will the _PSW object used. | |
1006 | */ | |
77e76609 RW |
1007 | psw_error = acpi_device_sleep_wake(device, 0, 0, 0); |
1008 | if (psw_error) | |
1009 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
1010 | "error in _DSW or _PSW evaluation\n")); | |
1da177e4 | 1011 | } |
1da177e4 | 1012 | |
bf325f95 RW |
1013 | static void acpi_bus_add_power_resource(acpi_handle handle); |
1014 | ||
9e89dde2 | 1015 | static int acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 1016 | { |
9e89dde2 ZR |
1017 | acpi_status status = 0; |
1018 | acpi_handle handle = NULL; | |
1019 | u32 i = 0; | |
1a365616 | 1020 | |
4be44fcd | 1021 | |
9e89dde2 ZR |
1022 | /* |
1023 | * Power Management Flags | |
1024 | */ | |
1025 | status = acpi_get_handle(device->handle, "_PSC", &handle); | |
1026 | if (ACPI_SUCCESS(status)) | |
1027 | device->power.flags.explicit_get = 1; | |
1028 | status = acpi_get_handle(device->handle, "_IRC", &handle); | |
1029 | if (ACPI_SUCCESS(status)) | |
1030 | device->power.flags.inrush_current = 1; | |
1da177e4 | 1031 | |
9e89dde2 ZR |
1032 | /* |
1033 | * Enumerate supported power management states | |
1034 | */ | |
1cc0c998 | 1035 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) { |
9e89dde2 ZR |
1036 | struct acpi_device_power_state *ps = &device->power.states[i]; |
1037 | char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' }; | |
1da177e4 | 1038 | |
9e89dde2 ZR |
1039 | /* Evaluate "_PRx" to se if power resources are referenced */ |
1040 | acpi_evaluate_reference(device->handle, object_name, NULL, | |
1041 | &ps->resources); | |
1042 | if (ps->resources.count) { | |
bf325f95 RW |
1043 | int j; |
1044 | ||
9e89dde2 | 1045 | device->power.flags.power_resources = 1; |
bf325f95 RW |
1046 | for (j = 0; j < ps->resources.count; j++) |
1047 | acpi_bus_add_power_resource(ps->resources.handles[j]); | |
1da177e4 | 1048 | } |
1da177e4 | 1049 | |
9e89dde2 ZR |
1050 | /* Evaluate "_PSx" to see if we can do explicit sets */ |
1051 | object_name[2] = 'S'; | |
1052 | status = acpi_get_handle(device->handle, object_name, &handle); | |
37239978 | 1053 | if (ACPI_SUCCESS(status)) |
9e89dde2 | 1054 | ps->flags.explicit_set = 1; |
1da177e4 | 1055 | |
1cc0c998 LM |
1056 | /* |
1057 | * State is valid if there are means to put the device into it. | |
1058 | * D3hot is only valid if _PR3 present. | |
1059 | */ | |
1060 | if (ps->resources.count || | |
1399dfcd | 1061 | (ps->flags.explicit_set && i < ACPI_STATE_D3_HOT)) { |
9e89dde2 | 1062 | ps->flags.valid = 1; |
1399dfcd AL |
1063 | ps->flags.os_accessible = 1; |
1064 | } | |
1da177e4 | 1065 | |
9e89dde2 ZR |
1066 | ps->power = -1; /* Unknown - driver assigned */ |
1067 | ps->latency = -1; /* Unknown - driver assigned */ | |
1068 | } | |
1da177e4 | 1069 | |
9e89dde2 ZR |
1070 | /* Set defaults for D0 and D3 states (always valid) */ |
1071 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
1072 | device->power.states[ACPI_STATE_D0].power = 100; | |
1073 | device->power.states[ACPI_STATE_D3].flags.valid = 1; | |
1074 | device->power.states[ACPI_STATE_D3].power = 0; | |
c8f7a62c | 1075 | |
5c7dd710 RW |
1076 | /* Set D3cold's explicit_set flag if _PS3 exists. */ |
1077 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set) | |
1078 | device->power.states[ACPI_STATE_D3_COLD].flags.explicit_set = 1; | |
1079 | ||
1399dfcd AL |
1080 | /* Presence of _PS3 or _PRx means we can put the device into D3 cold */ |
1081 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set || | |
1082 | device->power.flags.power_resources) | |
1083 | device->power.states[ACPI_STATE_D3_COLD].flags.os_accessible = 1; | |
1084 | ||
ade3e7fe | 1085 | acpi_bus_init_power(device); |
c8f7a62c | 1086 | |
9e89dde2 ZR |
1087 | return 0; |
1088 | } | |
c8f7a62c | 1089 | |
4be44fcd | 1090 | static int acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 1091 | { |
4be44fcd LB |
1092 | acpi_status status = AE_OK; |
1093 | acpi_handle temp = NULL; | |
1da177e4 | 1094 | |
1da177e4 LT |
1095 | |
1096 | /* Presence of _STA indicates 'dynamic_status' */ | |
1097 | status = acpi_get_handle(device->handle, "_STA", &temp); | |
1098 | if (ACPI_SUCCESS(status)) | |
1099 | device->flags.dynamic_status = 1; | |
1100 | ||
1da177e4 LT |
1101 | /* Presence of _RMV indicates 'removable' */ |
1102 | status = acpi_get_handle(device->handle, "_RMV", &temp); | |
1103 | if (ACPI_SUCCESS(status)) | |
1104 | device->flags.removable = 1; | |
1105 | ||
1106 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
1107 | status = acpi_get_handle(device->handle, "_EJD", &temp); | |
1108 | if (ACPI_SUCCESS(status)) | |
1109 | device->flags.ejectable = 1; | |
1110 | else { | |
1111 | status = acpi_get_handle(device->handle, "_EJ0", &temp); | |
1112 | if (ACPI_SUCCESS(status)) | |
1113 | device->flags.ejectable = 1; | |
1114 | } | |
1115 | ||
7bed50c5 RW |
1116 | /* Power resources cannot be power manageable. */ |
1117 | if (device->device_type == ACPI_BUS_TYPE_POWER) | |
1118 | return 0; | |
1119 | ||
1da177e4 LT |
1120 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ |
1121 | status = acpi_get_handle(device->handle, "_PS0", &temp); | |
1122 | if (ACPI_FAILURE(status)) | |
1123 | status = acpi_get_handle(device->handle, "_PR0", &temp); | |
1124 | if (ACPI_SUCCESS(status)) | |
1125 | device->flags.power_manageable = 1; | |
1126 | ||
3c5f9be4 | 1127 | /* TBD: Performance management */ |
1da177e4 | 1128 | |
d550d98d | 1129 | return 0; |
1da177e4 LT |
1130 | } |
1131 | ||
c7bcb4e9 | 1132 | static void acpi_device_get_busid(struct acpi_device *device) |
1da177e4 | 1133 | { |
4be44fcd LB |
1134 | char bus_id[5] = { '?', 0 }; |
1135 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
1136 | int i = 0; | |
1da177e4 LT |
1137 | |
1138 | /* | |
1139 | * Bus ID | |
1140 | * ------ | |
1141 | * The device's Bus ID is simply the object name. | |
1142 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
1143 | */ | |
859ac9a4 | 1144 | if (ACPI_IS_ROOT_DEVICE(device)) { |
1da177e4 | 1145 | strcpy(device->pnp.bus_id, "ACPI"); |
859ac9a4 BH |
1146 | return; |
1147 | } | |
1148 | ||
1149 | switch (device->device_type) { | |
1da177e4 LT |
1150 | case ACPI_BUS_TYPE_POWER_BUTTON: |
1151 | strcpy(device->pnp.bus_id, "PWRF"); | |
1152 | break; | |
1153 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
1154 | strcpy(device->pnp.bus_id, "SLPF"); | |
1155 | break; | |
1156 | default: | |
66b7ed40 | 1157 | acpi_get_name(device->handle, ACPI_SINGLE_NAME, &buffer); |
1da177e4 LT |
1158 | /* Clean up trailing underscores (if any) */ |
1159 | for (i = 3; i > 1; i--) { | |
1160 | if (bus_id[i] == '_') | |
1161 | bus_id[i] = '\0'; | |
1162 | else | |
1163 | break; | |
1164 | } | |
1165 | strcpy(device->pnp.bus_id, bus_id); | |
1166 | break; | |
1167 | } | |
1168 | } | |
1169 | ||
54735266 ZR |
1170 | /* |
1171 | * acpi_bay_match - see if a device is an ejectable driver bay | |
1172 | * | |
1173 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
1174 | * then we can safely call it an ejectable drive bay | |
1175 | */ | |
1176 | static int acpi_bay_match(struct acpi_device *device){ | |
1177 | acpi_status status; | |
1178 | acpi_handle handle; | |
1179 | acpi_handle tmp; | |
1180 | acpi_handle phandle; | |
1181 | ||
1182 | handle = device->handle; | |
1183 | ||
1184 | status = acpi_get_handle(handle, "_EJ0", &tmp); | |
1185 | if (ACPI_FAILURE(status)) | |
1186 | return -ENODEV; | |
1187 | ||
1188 | if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || | |
1189 | (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || | |
1190 | (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || | |
1191 | (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) | |
1192 | return 0; | |
1193 | ||
1194 | if (acpi_get_parent(handle, &phandle)) | |
1195 | return -ENODEV; | |
1196 | ||
1197 | if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) || | |
1198 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) || | |
1199 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) || | |
1200 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp)))) | |
1201 | return 0; | |
1202 | ||
1203 | return -ENODEV; | |
1204 | } | |
1205 | ||
3620f2f2 FS |
1206 | /* |
1207 | * acpi_dock_match - see if a device has a _DCK method | |
1208 | */ | |
1209 | static int acpi_dock_match(struct acpi_device *device) | |
1210 | { | |
1211 | acpi_handle tmp; | |
1212 | return acpi_get_handle(device->handle, "_DCK", &tmp); | |
1213 | } | |
1214 | ||
620e112c | 1215 | const char *acpi_device_hid(struct acpi_device *device) |
15b8dd53 | 1216 | { |
7f47fa6c | 1217 | struct acpi_hardware_id *hid; |
15b8dd53 | 1218 | |
2b2ae7c7 TR |
1219 | if (list_empty(&device->pnp.ids)) |
1220 | return dummy_hid; | |
1221 | ||
7f47fa6c BH |
1222 | hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list); |
1223 | return hid->id; | |
1224 | } | |
1225 | EXPORT_SYMBOL(acpi_device_hid); | |
15b8dd53 | 1226 | |
7f47fa6c BH |
1227 | static void acpi_add_id(struct acpi_device *device, const char *dev_id) |
1228 | { | |
1229 | struct acpi_hardware_id *id; | |
15b8dd53 | 1230 | |
7f47fa6c BH |
1231 | id = kmalloc(sizeof(*id), GFP_KERNEL); |
1232 | if (!id) | |
1233 | return; | |
15b8dd53 | 1234 | |
581de59e | 1235 | id->id = kstrdup(dev_id, GFP_KERNEL); |
7f47fa6c BH |
1236 | if (!id->id) { |
1237 | kfree(id); | |
1238 | return; | |
15b8dd53 BM |
1239 | } |
1240 | ||
7f47fa6c | 1241 | list_add_tail(&id->list, &device->pnp.ids); |
15b8dd53 BM |
1242 | } |
1243 | ||
222e82ac DW |
1244 | /* |
1245 | * Old IBM workstations have a DSDT bug wherein the SMBus object | |
1246 | * lacks the SMBUS01 HID and the methods do not have the necessary "_" | |
1247 | * prefix. Work around this. | |
1248 | */ | |
1249 | static int acpi_ibm_smbus_match(struct acpi_device *device) | |
1250 | { | |
1251 | acpi_handle h_dummy; | |
1252 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
1253 | int result; | |
1254 | ||
1255 | if (!dmi_name_in_vendors("IBM")) | |
1256 | return -ENODEV; | |
1257 | ||
1258 | /* Look for SMBS object */ | |
1259 | result = acpi_get_name(device->handle, ACPI_SINGLE_NAME, &path); | |
1260 | if (result) | |
1261 | return result; | |
1262 | ||
1263 | if (strcmp("SMBS", path.pointer)) { | |
1264 | result = -ENODEV; | |
1265 | goto out; | |
1266 | } | |
1267 | ||
1268 | /* Does it have the necessary (but misnamed) methods? */ | |
1269 | result = -ENODEV; | |
1270 | if (ACPI_SUCCESS(acpi_get_handle(device->handle, "SBI", &h_dummy)) && | |
1271 | ACPI_SUCCESS(acpi_get_handle(device->handle, "SBR", &h_dummy)) && | |
1272 | ACPI_SUCCESS(acpi_get_handle(device->handle, "SBW", &h_dummy))) | |
1273 | result = 0; | |
1274 | out: | |
1275 | kfree(path.pointer); | |
1276 | return result; | |
1277 | } | |
1278 | ||
c7bcb4e9 | 1279 | static void acpi_device_set_id(struct acpi_device *device) |
1da177e4 | 1280 | { |
4be44fcd | 1281 | acpi_status status; |
57f3674f | 1282 | struct acpi_device_info *info; |
78e25fef | 1283 | struct acpi_pnp_device_id_list *cid_list; |
7f47fa6c | 1284 | int i; |
1da177e4 | 1285 | |
c7bcb4e9 | 1286 | switch (device->device_type) { |
1da177e4 | 1287 | case ACPI_BUS_TYPE_DEVICE: |
859ac9a4 | 1288 | if (ACPI_IS_ROOT_DEVICE(device)) { |
57f3674f | 1289 | acpi_add_id(device, ACPI_SYSTEM_HID); |
859ac9a4 BH |
1290 | break; |
1291 | } | |
1292 | ||
66b7ed40 | 1293 | status = acpi_get_object_info(device->handle, &info); |
1da177e4 | 1294 | if (ACPI_FAILURE(status)) { |
96b2dd1f | 1295 | printk(KERN_ERR PREFIX "%s: Error reading device info\n", __func__); |
1da177e4 LT |
1296 | return; |
1297 | } | |
1298 | ||
1da177e4 | 1299 | if (info->valid & ACPI_VALID_HID) |
57f3674f BH |
1300 | acpi_add_id(device, info->hardware_id.string); |
1301 | if (info->valid & ACPI_VALID_CID) { | |
15b8dd53 | 1302 | cid_list = &info->compatible_id_list; |
57f3674f BH |
1303 | for (i = 0; i < cid_list->count; i++) |
1304 | acpi_add_id(device, cid_list->ids[i].string); | |
1305 | } | |
1da177e4 LT |
1306 | if (info->valid & ACPI_VALID_ADR) { |
1307 | device->pnp.bus_address = info->address; | |
1308 | device->flags.bus_address = 1; | |
1309 | } | |
ccf78040 LZ |
1310 | if (info->valid & ACPI_VALID_UID) |
1311 | device->pnp.unique_id = kstrdup(info->unique_id.string, | |
1312 | GFP_KERNEL); | |
ae843332 | 1313 | |
a83893ae BH |
1314 | kfree(info); |
1315 | ||
57f3674f BH |
1316 | /* |
1317 | * Some devices don't reliably have _HIDs & _CIDs, so add | |
1318 | * synthetic HIDs to make sure drivers can find them. | |
1319 | */ | |
c3d6de69 | 1320 | if (acpi_is_video_device(device)) |
57f3674f | 1321 | acpi_add_id(device, ACPI_VIDEO_HID); |
3620f2f2 | 1322 | else if (ACPI_SUCCESS(acpi_bay_match(device))) |
57f3674f | 1323 | acpi_add_id(device, ACPI_BAY_HID); |
3620f2f2 | 1324 | else if (ACPI_SUCCESS(acpi_dock_match(device))) |
57f3674f | 1325 | acpi_add_id(device, ACPI_DOCK_HID); |
222e82ac DW |
1326 | else if (!acpi_ibm_smbus_match(device)) |
1327 | acpi_add_id(device, ACPI_SMBUS_IBM_HID); | |
b7b30de5 BH |
1328 | else if (!acpi_device_hid(device) && |
1329 | ACPI_IS_ROOT_DEVICE(device->parent)) { | |
1330 | acpi_add_id(device, ACPI_BUS_HID); /* \_SB, LNXSYBUS */ | |
1331 | strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME); | |
1332 | strcpy(device->pnp.device_class, ACPI_BUS_CLASS); | |
1333 | } | |
54735266 | 1334 | |
1da177e4 LT |
1335 | break; |
1336 | case ACPI_BUS_TYPE_POWER: | |
57f3674f | 1337 | acpi_add_id(device, ACPI_POWER_HID); |
1da177e4 LT |
1338 | break; |
1339 | case ACPI_BUS_TYPE_PROCESSOR: | |
57f3674f | 1340 | acpi_add_id(device, ACPI_PROCESSOR_OBJECT_HID); |
1da177e4 | 1341 | break; |
1da177e4 | 1342 | case ACPI_BUS_TYPE_THERMAL: |
57f3674f | 1343 | acpi_add_id(device, ACPI_THERMAL_HID); |
1da177e4 LT |
1344 | break; |
1345 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
57f3674f | 1346 | acpi_add_id(device, ACPI_BUTTON_HID_POWERF); |
1da177e4 LT |
1347 | break; |
1348 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
57f3674f | 1349 | acpi_add_id(device, ACPI_BUTTON_HID_SLEEPF); |
1da177e4 LT |
1350 | break; |
1351 | } | |
1da177e4 LT |
1352 | } |
1353 | ||
bc3b0772 | 1354 | static int acpi_device_set_context(struct acpi_device *device) |
1da177e4 | 1355 | { |
bc3b0772 BH |
1356 | acpi_status status; |
1357 | ||
1da177e4 LT |
1358 | /* |
1359 | * Context | |
1360 | * ------- | |
1361 | * Attach this 'struct acpi_device' to the ACPI object. This makes | |
bc3b0772 BH |
1362 | * resolutions from handle->device very efficient. Fixed hardware |
1363 | * devices have no handles, so we skip them. | |
1da177e4 | 1364 | */ |
bc3b0772 BH |
1365 | if (!device->handle) |
1366 | return 0; | |
1da177e4 | 1367 | |
bc3b0772 BH |
1368 | status = acpi_attach_data(device->handle, |
1369 | acpi_bus_data_handler, device); | |
1370 | if (ACPI_SUCCESS(status)) | |
1371 | return 0; | |
1372 | ||
1373 | printk(KERN_ERR PREFIX "Error attaching device data\n"); | |
1374 | return -ENODEV; | |
1da177e4 LT |
1375 | } |
1376 | ||
ae281795 | 1377 | static int acpi_bus_remove(struct acpi_device *dev) |
1da177e4 | 1378 | { |
1da177e4 | 1379 | if (!dev) |
d550d98d | 1380 | return -EINVAL; |
1da177e4 | 1381 | |
96333578 | 1382 | dev->removal_type = ACPI_BUS_REMOVAL_EJECT; |
1890a97a | 1383 | device_release_driver(&dev->dev); |
1da177e4 | 1384 | |
b17b537a | 1385 | acpi_device_unregister(dev); |
1da177e4 | 1386 | |
d550d98d | 1387 | return 0; |
1da177e4 LT |
1388 | } |
1389 | ||
5c478f49 BH |
1390 | static int acpi_add_single_object(struct acpi_device **child, |
1391 | acpi_handle handle, int type, | |
209d3b17 | 1392 | unsigned long long sta, bool match_driver) |
1da177e4 | 1393 | { |
77c24888 BH |
1394 | int result; |
1395 | struct acpi_device *device; | |
29aaefa6 | 1396 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 1397 | |
36bcbec7 | 1398 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 1399 | if (!device) { |
6468463a | 1400 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 1401 | return -ENOMEM; |
1da177e4 | 1402 | } |
1da177e4 | 1403 | |
7f47fa6c | 1404 | INIT_LIST_HEAD(&device->pnp.ids); |
caaa6efb | 1405 | device->device_type = type; |
1da177e4 | 1406 | device->handle = handle; |
5c478f49 | 1407 | device->parent = acpi_bus_get_parent(handle); |
778cbc1d | 1408 | STRUCT_TO_INT(device->status) = sta; |
c4168bff | 1409 | |
c7bcb4e9 | 1410 | acpi_device_get_busid(device); |
1da177e4 LT |
1411 | |
1412 | /* | |
1413 | * Flags | |
1414 | * ----- | |
778cbc1d BH |
1415 | * Note that we only look for object handles -- cannot evaluate objects |
1416 | * until we know the device is present and properly initialized. | |
1da177e4 LT |
1417 | */ |
1418 | result = acpi_bus_get_flags(device); | |
1419 | if (result) | |
1420 | goto end; | |
1421 | ||
1da177e4 LT |
1422 | /* |
1423 | * Initialize Device | |
1424 | * ----------------- | |
1425 | * TBD: Synch with Core's enumeration/initialization process. | |
1426 | */ | |
c7bcb4e9 | 1427 | acpi_device_set_id(device); |
1da177e4 LT |
1428 | |
1429 | /* | |
1430 | * Power Management | |
1431 | * ---------------- | |
1432 | */ | |
1433 | if (device->flags.power_manageable) { | |
1434 | result = acpi_bus_get_power_flags(device); | |
1435 | if (result) | |
1436 | goto end; | |
1437 | } | |
1438 | ||
4be44fcd | 1439 | /* |
1da177e4 LT |
1440 | * Wakeup device management |
1441 | *----------------------- | |
1442 | */ | |
d57d09a4 | 1443 | acpi_bus_get_wakeup_device_flags(device); |
1da177e4 LT |
1444 | |
1445 | /* | |
1446 | * Performance Management | |
1447 | * ---------------------- | |
1448 | */ | |
1449 | if (device->flags.performance_manageable) { | |
1450 | result = acpi_bus_get_perf_flags(device); | |
1451 | if (result) | |
1452 | goto end; | |
1453 | } | |
1454 | ||
bc3b0772 | 1455 | if ((result = acpi_device_set_context(device))) |
f61f9258 | 1456 | goto end; |
1da177e4 | 1457 | |
209d3b17 | 1458 | device->flags.match_driver = match_driver; |
66b7ed40 | 1459 | result = acpi_device_register(device); |
1da177e4 | 1460 | |
0c526d96 | 1461 | end: |
29aaefa6 BH |
1462 | if (!result) { |
1463 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1464 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
1465 | "Adding %s [%s] parent %s\n", dev_name(&device->dev), | |
1466 | (char *) buffer.pointer, | |
1467 | device->parent ? dev_name(&device->parent->dev) : | |
1468 | "(null)")); | |
1469 | kfree(buffer.pointer); | |
1da177e4 | 1470 | *child = device; |
29aaefa6 | 1471 | } else |
718fb0de | 1472 | acpi_device_release(&device->dev); |
1da177e4 | 1473 | |
d550d98d | 1474 | return result; |
1da177e4 | 1475 | } |
1da177e4 | 1476 | |
778cbc1d BH |
1477 | #define ACPI_STA_DEFAULT (ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | \ |
1478 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING) | |
1479 | ||
bf325f95 RW |
1480 | static void acpi_bus_add_power_resource(acpi_handle handle) |
1481 | { | |
bf325f95 RW |
1482 | struct acpi_device *device = NULL; |
1483 | ||
1484 | acpi_bus_get_device(handle, &device); | |
1485 | if (!device) | |
1486 | acpi_add_single_object(&device, handle, ACPI_BUS_TYPE_POWER, | |
209d3b17 | 1487 | ACPI_STA_DEFAULT, true); |
bf325f95 RW |
1488 | } |
1489 | ||
778cbc1d BH |
1490 | static int acpi_bus_type_and_status(acpi_handle handle, int *type, |
1491 | unsigned long long *sta) | |
1da177e4 | 1492 | { |
778cbc1d BH |
1493 | acpi_status status; |
1494 | acpi_object_type acpi_type; | |
1da177e4 | 1495 | |
778cbc1d | 1496 | status = acpi_get_type(handle, &acpi_type); |
51a85faf | 1497 | if (ACPI_FAILURE(status)) |
778cbc1d | 1498 | return -ENODEV; |
4be44fcd | 1499 | |
778cbc1d | 1500 | switch (acpi_type) { |
51a85faf BH |
1501 | case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */ |
1502 | case ACPI_TYPE_DEVICE: | |
778cbc1d BH |
1503 | *type = ACPI_BUS_TYPE_DEVICE; |
1504 | status = acpi_bus_get_status_handle(handle, sta); | |
1505 | if (ACPI_FAILURE(status)) | |
1506 | return -ENODEV; | |
51a85faf BH |
1507 | break; |
1508 | case ACPI_TYPE_PROCESSOR: | |
778cbc1d BH |
1509 | *type = ACPI_BUS_TYPE_PROCESSOR; |
1510 | status = acpi_bus_get_status_handle(handle, sta); | |
1511 | if (ACPI_FAILURE(status)) | |
1512 | return -ENODEV; | |
51a85faf BH |
1513 | break; |
1514 | case ACPI_TYPE_THERMAL: | |
778cbc1d BH |
1515 | *type = ACPI_BUS_TYPE_THERMAL; |
1516 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1517 | break; |
1518 | case ACPI_TYPE_POWER: | |
778cbc1d BH |
1519 | *type = ACPI_BUS_TYPE_POWER; |
1520 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1521 | break; |
1522 | default: | |
778cbc1d | 1523 | return -ENODEV; |
51a85faf | 1524 | } |
1da177e4 | 1525 | |
778cbc1d BH |
1526 | return 0; |
1527 | } | |
1528 | ||
e3863094 RW |
1529 | static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used, |
1530 | void *not_used, void **return_value) | |
778cbc1d | 1531 | { |
805d410f | 1532 | struct acpi_device *device = NULL; |
778cbc1d BH |
1533 | int type; |
1534 | unsigned long long sta; | |
e3b87f8a | 1535 | acpi_status status; |
778cbc1d BH |
1536 | int result; |
1537 | ||
4002bf38 RW |
1538 | acpi_bus_get_device(handle, &device); |
1539 | if (device) | |
1540 | goto out; | |
1541 | ||
778cbc1d BH |
1542 | result = acpi_bus_type_and_status(handle, &type, &sta); |
1543 | if (result) | |
1544 | return AE_OK; | |
1545 | ||
1546 | if (!(sta & ACPI_STA_DEVICE_PRESENT) && | |
b581a7f9 | 1547 | !(sta & ACPI_STA_DEVICE_FUNCTIONING)) { |
86e4e20e RW |
1548 | struct acpi_device_wakeup wakeup; |
1549 | acpi_handle temp; | |
1550 | ||
1551 | status = acpi_get_handle(handle, "_PRW", &temp); | |
1552 | if (ACPI_SUCCESS(status)) | |
1553 | acpi_bus_extract_wakeup_device_power_package(handle, | |
1554 | &wakeup); | |
778cbc1d | 1555 | return AE_CTRL_DEPTH; |
b581a7f9 | 1556 | } |
778cbc1d | 1557 | |
f95988de RW |
1558 | acpi_add_single_object(&device, handle, type, sta, |
1559 | type == ACPI_BUS_TYPE_POWER); | |
4002bf38 RW |
1560 | if (!device) |
1561 | return AE_CTRL_DEPTH; | |
805d410f | 1562 | |
209d3b17 | 1563 | device->flags.match_driver = true; |
1da177e4 | 1564 | |
4002bf38 | 1565 | out: |
51a85faf BH |
1566 | if (!*return_value) |
1567 | *return_value = device; | |
805d410f | 1568 | |
51a85faf BH |
1569 | return AE_OK; |
1570 | } | |
3fb02738 | 1571 | |
0fc300b0 RW |
1572 | static acpi_status acpi_bus_device_attach(acpi_handle handle, u32 lvl_not_used, |
1573 | void *not_used, void **ret_not_used) | |
805d410f | 1574 | { |
805d410f RW |
1575 | acpi_status status = AE_OK; |
1576 | struct acpi_device *device; | |
1577 | unsigned long long sta_not_used; | |
1578 | int type_not_used; | |
1579 | ||
1580 | /* | |
1581 | * Ignore errors ignored by acpi_bus_check_add() to avoid terminating | |
1582 | * namespace walks prematurely. | |
1583 | */ | |
1584 | if (acpi_bus_type_and_status(handle, &type_not_used, &sta_not_used)) | |
1585 | return AE_OK; | |
1586 | ||
1587 | if (acpi_bus_get_device(handle, &device)) | |
1588 | return AE_CTRL_DEPTH; | |
1589 | ||
0fc300b0 RW |
1590 | if (!acpi_match_device_ids(device, acpi_platform_device_ids)) { |
1591 | /* This is a known good platform device. */ | |
1592 | acpi_create_platform_device(device); | |
abe99210 | 1593 | } else if (device_attach(&device->dev) < 0) { |
0fc300b0 | 1594 | status = AE_CTRL_DEPTH; |
805d410f RW |
1595 | } |
1596 | return status; | |
1597 | } | |
1598 | ||
0cd6ac52 | 1599 | static int acpi_bus_scan(acpi_handle handle) |
51a85faf | 1600 | { |
51a85faf | 1601 | void *device = NULL; |
3fb02738 | 1602 | |
0cd6ac52 | 1603 | if (ACPI_SUCCESS(acpi_bus_check_add(handle, 0, NULL, &device))) |
51a85faf | 1604 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
e3863094 | 1605 | acpi_bus_check_add, NULL, NULL, &device); |
1da177e4 | 1606 | |
805d410f | 1607 | if (!device) |
0cd6ac52 | 1608 | return -ENODEV; |
805d410f | 1609 | |
0cd6ac52 | 1610 | if (ACPI_SUCCESS(acpi_bus_device_attach(handle, 0, NULL, NULL))) |
805d410f | 1611 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
0fc300b0 | 1612 | acpi_bus_device_attach, NULL, NULL, NULL); |
805d410f | 1613 | |
0cd6ac52 | 1614 | return 0; |
1da177e4 | 1615 | } |
1da177e4 | 1616 | |
636458de RW |
1617 | /** |
1618 | * acpi_bus_add - Add ACPI device node objects in a given namespace scope. | |
1619 | * @handle: Root of the namespace scope to scan. | |
636458de RW |
1620 | * |
1621 | * Scan a given ACPI tree (probably recently hot-plugged) and create and add | |
1622 | * found devices. | |
7779688f | 1623 | * |
636458de RW |
1624 | * If no devices were found, -ENODEV is returned, but it does not mean that |
1625 | * there has been a real error. There just have been no suitable ACPI objects | |
1626 | * in the table trunk from which the kernel could create a device and add an | |
1627 | * appropriate driver. | |
7779688f | 1628 | */ |
0cd6ac52 | 1629 | int acpi_bus_add(acpi_handle handle) |
3fb02738 | 1630 | { |
02f57c67 | 1631 | int err; |
d2f6650a | 1632 | |
0cd6ac52 | 1633 | err = acpi_bus_scan(handle); |
02f57c67 RW |
1634 | if (err) |
1635 | return err; | |
a2100801 | 1636 | |
3a37898d | 1637 | acpi_update_all_gpes(); |
0fc300b0 | 1638 | return 0; |
3fb02738 | 1639 | } |
02f57c67 | 1640 | EXPORT_SYMBOL(acpi_bus_add); |
1da177e4 | 1641 | |
ae281795 | 1642 | int acpi_bus_trim(struct acpi_device *start) |
1da177e4 | 1643 | { |
4be44fcd LB |
1644 | acpi_status status; |
1645 | struct acpi_device *parent, *child; | |
1646 | acpi_handle phandle, chandle; | |
1647 | acpi_object_type type; | |
1648 | u32 level = 1; | |
1649 | int err = 0; | |
1650 | ||
1651 | parent = start; | |
1da177e4 LT |
1652 | phandle = start->handle; |
1653 | child = chandle = NULL; | |
1654 | ||
1655 | while ((level > 0) && parent && (!err)) { | |
1656 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, | |
4be44fcd | 1657 | chandle, &chandle); |
1da177e4 LT |
1658 | |
1659 | /* | |
1660 | * If this scope is exhausted then move our way back up. | |
1661 | */ | |
1662 | if (ACPI_FAILURE(status)) { | |
1663 | level--; | |
1664 | chandle = phandle; | |
1665 | acpi_get_parent(phandle, &phandle); | |
1666 | child = parent; | |
1667 | parent = parent->parent; | |
ae281795 | 1668 | err = acpi_bus_remove(child); |
1da177e4 LT |
1669 | continue; |
1670 | } | |
1671 | ||
1672 | status = acpi_get_type(chandle, &type); | |
1673 | if (ACPI_FAILURE(status)) { | |
1674 | continue; | |
1675 | } | |
1676 | /* | |
1677 | * If there is a device corresponding to chandle then | |
1678 | * parse it (depth-first). | |
1679 | */ | |
1680 | if (acpi_bus_get_device(chandle, &child) == 0) { | |
1681 | level++; | |
1682 | phandle = chandle; | |
1683 | chandle = NULL; | |
1684 | parent = child; | |
1685 | } | |
1686 | continue; | |
1687 | } | |
1688 | return err; | |
1689 | } | |
ceaba663 KA |
1690 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
1691 | ||
e8b945c9 | 1692 | static int acpi_bus_scan_fixed(void) |
1da177e4 | 1693 | { |
4be44fcd LB |
1694 | int result = 0; |
1695 | struct acpi_device *device = NULL; | |
c4168bff | 1696 | |
1da177e4 LT |
1697 | /* |
1698 | * Enumerate all fixed-feature devices. | |
1699 | */ | |
cee324b1 | 1700 | if ((acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON) == 0) { |
5c478f49 | 1701 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1702 | ACPI_BUS_TYPE_POWER_BUTTON, |
209d3b17 | 1703 | ACPI_STA_DEFAULT, true); |
c10d7a13 | 1704 | device_init_wakeup(&device->dev, true); |
3fb02738 | 1705 | } |
1da177e4 | 1706 | |
cee324b1 | 1707 | if ((acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON) == 0) { |
5c478f49 | 1708 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1709 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
209d3b17 | 1710 | ACPI_STA_DEFAULT, true); |
3fb02738 | 1711 | } |
1da177e4 | 1712 | |
d550d98d | 1713 | return result; |
1da177e4 LT |
1714 | } |
1715 | ||
e747f274 | 1716 | int __init acpi_scan_init(void) |
1da177e4 LT |
1717 | { |
1718 | int result; | |
1da177e4 | 1719 | |
5b327265 PM |
1720 | result = bus_register(&acpi_bus_type); |
1721 | if (result) { | |
1722 | /* We don't want to quit even if we failed to add suspend/resume */ | |
1723 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
1724 | } | |
1725 | ||
97d9a9e9 | 1726 | acpi_power_init(); |
92ef2a25 | 1727 | acpi_pci_root_init(); |
97d9a9e9 | 1728 | |
1da177e4 LT |
1729 | /* |
1730 | * Enumerate devices in the ACPI namespace. | |
1731 | */ | |
0cd6ac52 RW |
1732 | result = acpi_bus_scan(ACPI_ROOT_OBJECT); |
1733 | if (result) | |
1734 | return result; | |
c04209a7 | 1735 | |
0cd6ac52 | 1736 | result = acpi_bus_get_device(ACPI_ROOT_OBJECT, &acpi_root); |
c4168bff | 1737 | if (!result) |
adc08e20 | 1738 | result = acpi_bus_scan_fixed(); |
1da177e4 LT |
1739 | |
1740 | if (result) | |
b17b537a | 1741 | acpi_device_unregister(acpi_root); |
a2100801 | 1742 | else |
3a37898d | 1743 | acpi_update_all_gpes(); |
1da177e4 | 1744 | |
d550d98d | 1745 | return result; |
1da177e4 | 1746 | } |