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 | ||
38 | { } | |
39 | }; | |
40 | ||
1da177e4 | 41 | static LIST_HEAD(acpi_device_list); |
e49bd2dd | 42 | static LIST_HEAD(acpi_bus_id_list); |
9090589d | 43 | DEFINE_MUTEX(acpi_device_lock); |
1da177e4 LT |
44 | LIST_HEAD(acpi_wakeup_device_list); |
45 | ||
e49bd2dd | 46 | struct acpi_device_bus_id{ |
bb095854 | 47 | char bus_id[15]; |
e49bd2dd ZR |
48 | unsigned int instance_no; |
49 | struct list_head node; | |
1da177e4 | 50 | }; |
29b71a1c TR |
51 | |
52 | /* | |
53 | * Creates hid/cid(s) string needed for modalias and uevent | |
54 | * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: | |
55 | * char *modalias: "acpi:IBM0001:ACPI0001" | |
56 | */ | |
b3e572d2 AB |
57 | static int create_modalias(struct acpi_device *acpi_dev, char *modalias, |
58 | int size) | |
59 | { | |
29b71a1c | 60 | int len; |
5c9fcb5d | 61 | int count; |
7f47fa6c | 62 | struct acpi_hardware_id *id; |
29b71a1c | 63 | |
2b2ae7c7 TR |
64 | if (list_empty(&acpi_dev->pnp.ids)) |
65 | return 0; | |
66 | ||
5c9fcb5d | 67 | len = snprintf(modalias, size, "acpi:"); |
29b71a1c TR |
68 | size -= len; |
69 | ||
7f47fa6c BH |
70 | list_for_each_entry(id, &acpi_dev->pnp.ids, list) { |
71 | count = snprintf(&modalias[len], size, "%s:", id->id); | |
5c9fcb5d ZR |
72 | if (count < 0 || count >= size) |
73 | return -EINVAL; | |
74 | len += count; | |
75 | size -= count; | |
76 | } | |
77 | ||
29b71a1c TR |
78 | modalias[len] = '\0'; |
79 | return len; | |
80 | } | |
81 | ||
82 | static ssize_t | |
83 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
84 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
85 | int len; | |
86 | ||
87 | /* Device has no HID and no CID or string is >1024 */ | |
88 | len = create_modalias(acpi_dev, buf, 1024); | |
89 | if (len <= 0) | |
90 | return 0; | |
91 | buf[len++] = '\n'; | |
92 | return len; | |
93 | } | |
94 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); | |
95 | ||
c4753e57 TK |
96 | /** |
97 | * acpi_bus_hot_remove_device: hot-remove a device and its children | |
98 | * @context: struct acpi_eject_event pointer (freed in this func) | |
99 | * | |
100 | * Hot-remove a device and its children. This function frees up the | |
101 | * memory space passed by arg context, so that the caller may call | |
102 | * this function asynchronously through acpi_os_hotplug_execute(). | |
103 | */ | |
104 | void acpi_bus_hot_remove_device(void *context) | |
1da177e4 | 105 | { |
c4753e57 | 106 | struct acpi_eject_event *ej_event = (struct acpi_eject_event *) context; |
26d46867 | 107 | struct acpi_device *device; |
c4753e57 | 108 | acpi_handle handle = ej_event->handle; |
1da177e4 LT |
109 | struct acpi_object_list arg_list; |
110 | union acpi_object arg; | |
111 | acpi_status status = AE_OK; | |
c4753e57 | 112 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; /* default */ |
1da177e4 | 113 | |
26d46867 | 114 | if (acpi_bus_get_device(handle, &device)) |
c4753e57 | 115 | goto err_out; |
26d46867 ZR |
116 | |
117 | if (!device) | |
c4753e57 | 118 | goto err_out; |
26d46867 ZR |
119 | |
120 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
0794469d | 121 | "Hot-removing device %s...\n", dev_name(&device->dev))); |
26d46867 ZR |
122 | |
123 | if (acpi_bus_trim(device, 1)) { | |
55ac9a01 LM |
124 | printk(KERN_ERR PREFIX |
125 | "Removing device failed\n"); | |
c4753e57 | 126 | goto err_out; |
26d46867 | 127 | } |
1da177e4 | 128 | |
26d46867 ZR |
129 | /* power off device */ |
130 | status = acpi_evaluate_object(handle, "_PS3", NULL, NULL); | |
131 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) | |
55ac9a01 LM |
132 | printk(KERN_WARNING PREFIX |
133 | "Power-off device failed\n"); | |
26d46867 ZR |
134 | |
135 | if (device->flags.lockable) { | |
1da177e4 LT |
136 | arg_list.count = 1; |
137 | arg_list.pointer = &arg; | |
138 | arg.type = ACPI_TYPE_INTEGER; | |
139 | arg.integer.value = 0; | |
140 | acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); | |
141 | } | |
1da177e4 | 142 | |
1da177e4 LT |
143 | arg_list.count = 1; |
144 | arg_list.pointer = &arg; | |
145 | arg.type = ACPI_TYPE_INTEGER; | |
146 | arg.integer.value = 1; | |
1da177e4 | 147 | |
1da177e4 LT |
148 | /* |
149 | * TBD: _EJD support. | |
150 | */ | |
1da177e4 | 151 | status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); |
c4753e57 TK |
152 | if (ACPI_FAILURE(status)) { |
153 | if (status != AE_NOT_FOUND) | |
154 | printk(KERN_WARNING PREFIX | |
155 | "Eject device failed\n"); | |
156 | goto err_out; | |
157 | } | |
1da177e4 | 158 | |
c4753e57 TK |
159 | kfree(context); |
160 | return; | |
1da177e4 | 161 | |
c4753e57 TK |
162 | err_out: |
163 | /* Inform firmware the hot-remove operation has completed w/ error */ | |
164 | (void) acpi_evaluate_hotplug_ost(handle, | |
165 | ej_event->event, ost_code, NULL); | |
166 | kfree(context); | |
c8d72a5e | 167 | return; |
1da177e4 LT |
168 | } |
169 | ||
1da177e4 | 170 | static ssize_t |
f883d9db PM |
171 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
172 | const char *buf, size_t count) | |
1da177e4 | 173 | { |
4be44fcd | 174 | int ret = count; |
4be44fcd | 175 | acpi_status status; |
4be44fcd | 176 | acpi_object_type type = 0; |
f883d9db | 177 | struct acpi_device *acpi_device = to_acpi_device(d); |
c4753e57 | 178 | struct acpi_eject_event *ej_event; |
1da177e4 | 179 | |
1da177e4 LT |
180 | if ((!count) || (buf[0] != '1')) { |
181 | return -EINVAL; | |
182 | } | |
1da177e4 | 183 | #ifndef FORCE_EJECT |
f883d9db | 184 | if (acpi_device->driver == NULL) { |
1da177e4 LT |
185 | ret = -ENODEV; |
186 | goto err; | |
187 | } | |
188 | #endif | |
f883d9db PM |
189 | status = acpi_get_type(acpi_device->handle, &type); |
190 | if (ACPI_FAILURE(status) || (!acpi_device->flags.ejectable)) { | |
1da177e4 LT |
191 | ret = -ENODEV; |
192 | goto err; | |
193 | } | |
1da177e4 | 194 | |
c4753e57 TK |
195 | ej_event = kmalloc(sizeof(*ej_event), GFP_KERNEL); |
196 | if (!ej_event) { | |
197 | ret = -ENOMEM; | |
198 | goto err; | |
199 | } | |
200 | ||
201 | ej_event->handle = acpi_device->handle; | |
202 | if (acpi_device->flags.eject_pending) { | |
203 | /* event originated from ACPI eject notification */ | |
204 | ej_event->event = ACPI_NOTIFY_EJECT_REQUEST; | |
205 | acpi_device->flags.eject_pending = 0; | |
206 | } else { | |
207 | /* event originated from user */ | |
208 | ej_event->event = ACPI_OST_EC_OSPM_EJECT; | |
209 | (void) acpi_evaluate_hotplug_ost(ej_event->handle, | |
210 | ej_event->event, ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); | |
211 | } | |
212 | ||
213 | acpi_os_hotplug_execute(acpi_bus_hot_remove_device, (void *)ej_event); | |
74523c90 | 214 | err: |
1da177e4 | 215 | return ret; |
1da177e4 LT |
216 | } |
217 | ||
f883d9db | 218 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
1da177e4 | 219 | |
e49bd2dd ZR |
220 | static ssize_t |
221 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
222 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1da177e4 | 223 | |
ea8d82fd | 224 | return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev)); |
1da177e4 | 225 | } |
e49bd2dd | 226 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
1da177e4 | 227 | |
e49bd2dd ZR |
228 | static ssize_t |
229 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
230 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
231 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
232 | int result; | |
1da177e4 | 233 | |
e49bd2dd | 234 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
0c526d96 | 235 | if (result) |
e49bd2dd | 236 | goto end; |
1da177e4 | 237 | |
e49bd2dd ZR |
238 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
239 | kfree(path.pointer); | |
0c526d96 | 240 | end: |
e49bd2dd | 241 | return result; |
1da177e4 | 242 | } |
e49bd2dd | 243 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
1da177e4 | 244 | |
d1efe3c3 LO |
245 | /* sysfs file that shows description text from the ACPI _STR method */ |
246 | static ssize_t description_show(struct device *dev, | |
247 | struct device_attribute *attr, | |
248 | char *buf) { | |
249 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
250 | int result; | |
251 | ||
252 | if (acpi_dev->pnp.str_obj == NULL) | |
253 | return 0; | |
254 | ||
255 | /* | |
256 | * The _STR object contains a Unicode identifier for a device. | |
257 | * We need to convert to utf-8 so it can be displayed. | |
258 | */ | |
259 | result = utf16s_to_utf8s( | |
260 | (wchar_t *)acpi_dev->pnp.str_obj->buffer.pointer, | |
261 | acpi_dev->pnp.str_obj->buffer.length, | |
262 | UTF16_LITTLE_ENDIAN, buf, | |
263 | PAGE_SIZE); | |
264 | ||
265 | buf[result++] = '\n'; | |
266 | ||
267 | return result; | |
268 | } | |
269 | static DEVICE_ATTR(description, 0444, description_show, NULL); | |
270 | ||
e49bd2dd | 271 | static int acpi_device_setup_files(struct acpi_device *dev) |
1da177e4 | 272 | { |
d1efe3c3 | 273 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
f883d9db PM |
274 | acpi_status status; |
275 | acpi_handle temp; | |
e49bd2dd | 276 | int result = 0; |
1da177e4 LT |
277 | |
278 | /* | |
e49bd2dd | 279 | * Devices gotten from FADT don't have a "path" attribute |
1da177e4 | 280 | */ |
0c526d96 | 281 | if (dev->handle) { |
e49bd2dd | 282 | result = device_create_file(&dev->dev, &dev_attr_path); |
0c526d96 | 283 | if (result) |
e49bd2dd | 284 | goto end; |
1da177e4 LT |
285 | } |
286 | ||
2b2ae7c7 TR |
287 | if (!list_empty(&dev->pnp.ids)) { |
288 | result = device_create_file(&dev->dev, &dev_attr_hid); | |
289 | if (result) | |
290 | goto end; | |
1da177e4 | 291 | |
2b2ae7c7 TR |
292 | result = device_create_file(&dev->dev, &dev_attr_modalias); |
293 | if (result) | |
294 | goto end; | |
295 | } | |
29b71a1c | 296 | |
d1efe3c3 LO |
297 | /* |
298 | * If device has _STR, 'description' file is created | |
299 | */ | |
300 | status = acpi_get_handle(dev->handle, "_STR", &temp); | |
301 | if (ACPI_SUCCESS(status)) { | |
302 | status = acpi_evaluate_object(dev->handle, "_STR", | |
303 | NULL, &buffer); | |
304 | if (ACPI_FAILURE(status)) | |
305 | buffer.pointer = NULL; | |
306 | dev->pnp.str_obj = buffer.pointer; | |
307 | result = device_create_file(&dev->dev, &dev_attr_description); | |
308 | if (result) | |
309 | goto end; | |
310 | } | |
311 | ||
e49bd2dd ZR |
312 | /* |
313 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
314 | * hot-removal function from userland. | |
315 | */ | |
f883d9db PM |
316 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); |
317 | if (ACPI_SUCCESS(status)) | |
e49bd2dd | 318 | result = device_create_file(&dev->dev, &dev_attr_eject); |
0c526d96 | 319 | end: |
e49bd2dd | 320 | return result; |
1da177e4 LT |
321 | } |
322 | ||
f883d9db | 323 | static void acpi_device_remove_files(struct acpi_device *dev) |
1da177e4 | 324 | { |
f883d9db PM |
325 | acpi_status status; |
326 | acpi_handle temp; | |
1da177e4 | 327 | |
f883d9db | 328 | /* |
d1efe3c3 LO |
329 | * If device has _STR, remove 'description' file |
330 | */ | |
331 | status = acpi_get_handle(dev->handle, "_STR", &temp); | |
332 | if (ACPI_SUCCESS(status)) { | |
333 | kfree(dev->pnp.str_obj); | |
334 | device_remove_file(&dev->dev, &dev_attr_description); | |
335 | } | |
336 | /* | |
337 | * If device has _EJ0, remove 'eject' file. | |
f883d9db PM |
338 | */ |
339 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); | |
340 | if (ACPI_SUCCESS(status)) | |
341 | device_remove_file(&dev->dev, &dev_attr_eject); | |
1da177e4 | 342 | |
1131b938 BH |
343 | device_remove_file(&dev->dev, &dev_attr_modalias); |
344 | device_remove_file(&dev->dev, &dev_attr_hid); | |
0c526d96 | 345 | if (dev->handle) |
e49bd2dd | 346 | device_remove_file(&dev->dev, &dev_attr_path); |
1da177e4 | 347 | } |
1da177e4 | 348 | /* -------------------------------------------------------------------------- |
9e89dde2 | 349 | ACPI Bus operations |
1da177e4 | 350 | -------------------------------------------------------------------------- */ |
29b71a1c | 351 | |
cf761af9 MW |
352 | static const struct acpi_device_id *__acpi_match_device( |
353 | struct acpi_device *device, const struct acpi_device_id *ids) | |
29b71a1c TR |
354 | { |
355 | const struct acpi_device_id *id; | |
7f47fa6c | 356 | struct acpi_hardware_id *hwid; |
29b71a1c | 357 | |
39a0ad87 ZY |
358 | /* |
359 | * If the device is not present, it is unnecessary to load device | |
360 | * driver for it. | |
361 | */ | |
362 | if (!device->status.present) | |
cf761af9 | 363 | return NULL; |
39a0ad87 | 364 | |
7f47fa6c BH |
365 | for (id = ids; id->id[0]; id++) |
366 | list_for_each_entry(hwid, &device->pnp.ids, list) | |
367 | if (!strcmp((char *) id->id, hwid->id)) | |
cf761af9 MW |
368 | return id; |
369 | ||
370 | return NULL; | |
371 | } | |
372 | ||
373 | /** | |
374 | * acpi_match_device - Match a struct device against a given list of ACPI IDs | |
375 | * @ids: Array of struct acpi_device_id object to match against. | |
376 | * @dev: The device structure to match. | |
377 | * | |
378 | * Check if @dev has a valid ACPI handle and if there is a struct acpi_device | |
379 | * object for that handle and use that object to match against a given list of | |
380 | * device IDs. | |
381 | * | |
382 | * Return a pointer to the first matching ID on success or %NULL on failure. | |
383 | */ | |
384 | const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids, | |
385 | const struct device *dev) | |
386 | { | |
387 | struct acpi_device *adev; | |
388 | ||
389 | if (!ids || !dev->acpi_handle | |
390 | || ACPI_FAILURE(acpi_bus_get_device(dev->acpi_handle, &adev))) | |
391 | return NULL; | |
392 | ||
393 | return __acpi_match_device(adev, ids); | |
394 | } | |
395 | EXPORT_SYMBOL_GPL(acpi_match_device); | |
29b71a1c | 396 | |
cf761af9 MW |
397 | int acpi_match_device_ids(struct acpi_device *device, |
398 | const struct acpi_device_id *ids) | |
399 | { | |
400 | return __acpi_match_device(device, ids) ? 0 : -ENOENT; | |
29b71a1c TR |
401 | } |
402 | EXPORT_SYMBOL(acpi_match_device_ids); | |
403 | ||
7f47fa6c BH |
404 | static void acpi_free_ids(struct acpi_device *device) |
405 | { | |
406 | struct acpi_hardware_id *id, *tmp; | |
407 | ||
408 | list_for_each_entry_safe(id, tmp, &device->pnp.ids, list) { | |
409 | kfree(id->id); | |
410 | kfree(id); | |
411 | } | |
412 | } | |
413 | ||
1890a97a | 414 | static void acpi_device_release(struct device *dev) |
1da177e4 | 415 | { |
1890a97a | 416 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 417 | |
7f47fa6c | 418 | acpi_free_ids(acpi_dev); |
1890a97a | 419 | kfree(acpi_dev); |
1da177e4 LT |
420 | } |
421 | ||
5d9464a4 | 422 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 423 | { |
5d9464a4 PM |
424 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
425 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
1da177e4 | 426 | |
29b71a1c | 427 | return !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
5d9464a4 | 428 | } |
1da177e4 | 429 | |
7eff2e7a | 430 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 | 431 | { |
5d9464a4 | 432 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
7eff2e7a | 433 | int len; |
5d9464a4 | 434 | |
2b2ae7c7 TR |
435 | if (list_empty(&acpi_dev->pnp.ids)) |
436 | return 0; | |
437 | ||
7eff2e7a KS |
438 | if (add_uevent_var(env, "MODALIAS=")) |
439 | return -ENOMEM; | |
440 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], | |
441 | sizeof(env->buf) - env->buflen); | |
442 | if (len >= (sizeof(env->buf) - env->buflen)) | |
443 | return -ENOMEM; | |
444 | env->buflen += len; | |
9e89dde2 | 445 | return 0; |
1da177e4 LT |
446 | } |
447 | ||
46ec8598 BH |
448 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
449 | { | |
450 | struct acpi_device *device = data; | |
451 | ||
452 | device->driver->ops.notify(device, event); | |
453 | } | |
454 | ||
455 | static acpi_status acpi_device_notify_fixed(void *data) | |
456 | { | |
457 | struct acpi_device *device = data; | |
458 | ||
53de5356 BH |
459 | /* Fixed hardware devices have no handles */ |
460 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); | |
46ec8598 BH |
461 | return AE_OK; |
462 | } | |
463 | ||
464 | static int acpi_device_install_notify_handler(struct acpi_device *device) | |
465 | { | |
466 | acpi_status status; | |
46ec8598 | 467 | |
ccba2a36 | 468 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
469 | status = |
470 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
471 | acpi_device_notify_fixed, | |
472 | device); | |
ccba2a36 | 473 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
474 | status = |
475 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
476 | acpi_device_notify_fixed, | |
477 | device); | |
478 | else | |
479 | status = acpi_install_notify_handler(device->handle, | |
480 | ACPI_DEVICE_NOTIFY, | |
481 | acpi_device_notify, | |
482 | device); | |
483 | ||
484 | if (ACPI_FAILURE(status)) | |
485 | return -EINVAL; | |
486 | return 0; | |
487 | } | |
488 | ||
489 | static void acpi_device_remove_notify_handler(struct acpi_device *device) | |
490 | { | |
ccba2a36 | 491 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
492 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, |
493 | acpi_device_notify_fixed); | |
ccba2a36 | 494 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
495 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, |
496 | acpi_device_notify_fixed); | |
497 | else | |
498 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, | |
499 | acpi_device_notify); | |
500 | } | |
501 | ||
5d9464a4 PM |
502 | static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *); |
503 | static int acpi_start_single_object(struct acpi_device *); | |
504 | static int acpi_device_probe(struct device * dev) | |
1da177e4 | 505 | { |
5d9464a4 PM |
506 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
507 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
508 | int ret; | |
509 | ||
510 | ret = acpi_bus_driver_init(acpi_dev, acpi_drv); | |
511 | if (!ret) { | |
c4168bff LS |
512 | if (acpi_dev->bus_ops.acpi_op_start) |
513 | acpi_start_single_object(acpi_dev); | |
46ec8598 BH |
514 | |
515 | if (acpi_drv->ops.notify) { | |
516 | ret = acpi_device_install_notify_handler(acpi_dev); | |
517 | if (ret) { | |
46ec8598 BH |
518 | if (acpi_drv->ops.remove) |
519 | acpi_drv->ops.remove(acpi_dev, | |
520 | acpi_dev->removal_type); | |
521 | return ret; | |
522 | } | |
523 | } | |
524 | ||
5d9464a4 PM |
525 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
526 | "Found driver [%s] for device [%s]\n", | |
527 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
528 | get_device(dev); | |
529 | } | |
530 | return ret; | |
531 | } | |
1da177e4 | 532 | |
5d9464a4 PM |
533 | static int acpi_device_remove(struct device * dev) |
534 | { | |
535 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
536 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
537 | ||
538 | if (acpi_drv) { | |
46ec8598 BH |
539 | if (acpi_drv->ops.notify) |
540 | acpi_device_remove_notify_handler(acpi_dev); | |
5d9464a4 | 541 | if (acpi_drv->ops.remove) |
96333578 | 542 | acpi_drv->ops.remove(acpi_dev, acpi_dev->removal_type); |
1da177e4 | 543 | } |
5d9464a4 | 544 | acpi_dev->driver = NULL; |
db89b4f0 | 545 | acpi_dev->driver_data = NULL; |
1da177e4 | 546 | |
5d9464a4 | 547 | put_device(dev); |
9e89dde2 ZR |
548 | return 0; |
549 | } | |
1da177e4 | 550 | |
55955aad | 551 | struct bus_type acpi_bus_type = { |
9e89dde2 | 552 | .name = "acpi", |
5d9464a4 PM |
553 | .match = acpi_bus_match, |
554 | .probe = acpi_device_probe, | |
555 | .remove = acpi_device_remove, | |
556 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
557 | }; |
558 | ||
66b7ed40 | 559 | static int acpi_device_register(struct acpi_device *device) |
1da177e4 | 560 | { |
4be44fcd | 561 | int result; |
e49bd2dd ZR |
562 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
563 | int found = 0; | |
66b7ed40 | 564 | |
9e89dde2 ZR |
565 | /* |
566 | * Linkage | |
567 | * ------- | |
568 | * Link this device to its parent and siblings. | |
569 | */ | |
570 | INIT_LIST_HEAD(&device->children); | |
571 | INIT_LIST_HEAD(&device->node); | |
9e89dde2 | 572 | INIT_LIST_HEAD(&device->wakeup_list); |
1033f904 LT |
573 | INIT_LIST_HEAD(&device->physical_node_list); |
574 | mutex_init(&device->physical_node_lock); | |
1da177e4 | 575 | |
e49bd2dd ZR |
576 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
577 | if (!new_bus_id) { | |
578 | printk(KERN_ERR PREFIX "Memory allocation error\n"); | |
579 | return -ENOMEM; | |
1da177e4 | 580 | } |
e49bd2dd | 581 | |
9090589d | 582 | mutex_lock(&acpi_device_lock); |
e49bd2dd ZR |
583 | /* |
584 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
585 | * If failed, create one and link it into acpi_bus_id_list | |
586 | */ | |
587 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
1131b938 BH |
588 | if (!strcmp(acpi_device_bus_id->bus_id, |
589 | acpi_device_hid(device))) { | |
590 | acpi_device_bus_id->instance_no++; | |
e49bd2dd ZR |
591 | found = 1; |
592 | kfree(new_bus_id); | |
593 | break; | |
594 | } | |
1da177e4 | 595 | } |
0c526d96 | 596 | if (!found) { |
e49bd2dd | 597 | acpi_device_bus_id = new_bus_id; |
1131b938 | 598 | strcpy(acpi_device_bus_id->bus_id, acpi_device_hid(device)); |
e49bd2dd ZR |
599 | acpi_device_bus_id->instance_no = 0; |
600 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 601 | } |
0794469d | 602 | dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 603 | |
33b57150 | 604 | if (device->parent) |
9e89dde2 | 605 | list_add_tail(&device->node, &device->parent->children); |
33b57150 | 606 | |
9e89dde2 ZR |
607 | if (device->wakeup.flags.valid) |
608 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
9090589d | 609 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 610 | |
1890a97a | 611 | if (device->parent) |
66b7ed40 | 612 | device->dev.parent = &device->parent->dev; |
1890a97a | 613 | device->dev.bus = &acpi_bus_type; |
1890a97a | 614 | device->dev.release = &acpi_device_release; |
8b12b922 | 615 | result = device_register(&device->dev); |
0c526d96 | 616 | if (result) { |
8b12b922 | 617 | dev_err(&device->dev, "Error registering device\n"); |
e49bd2dd | 618 | goto end; |
1da177e4 | 619 | } |
1da177e4 | 620 | |
e49bd2dd | 621 | result = acpi_device_setup_files(device); |
0c526d96 | 622 | if (result) |
0794469d KS |
623 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
624 | dev_name(&device->dev)); | |
1da177e4 | 625 | |
96333578 | 626 | device->removal_type = ACPI_BUS_REMOVAL_NORMAL; |
1da177e4 | 627 | return 0; |
0c526d96 | 628 | end: |
9090589d | 629 | mutex_lock(&acpi_device_lock); |
33b57150 | 630 | if (device->parent) |
e49bd2dd | 631 | list_del(&device->node); |
e49bd2dd | 632 | list_del(&device->wakeup_list); |
9090589d | 633 | mutex_unlock(&acpi_device_lock); |
e49bd2dd | 634 | return result; |
1da177e4 LT |
635 | } |
636 | ||
9e89dde2 ZR |
637 | static void acpi_device_unregister(struct acpi_device *device, int type) |
638 | { | |
9090589d | 639 | mutex_lock(&acpi_device_lock); |
33b57150 | 640 | if (device->parent) |
9e89dde2 | 641 | list_del(&device->node); |
1da177e4 | 642 | |
9e89dde2 | 643 | list_del(&device->wakeup_list); |
9090589d | 644 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 645 | |
9e89dde2 | 646 | acpi_detach_data(device->handle, acpi_bus_data_handler); |
1890a97a | 647 | |
f883d9db | 648 | acpi_device_remove_files(device); |
1890a97a | 649 | device_unregister(&device->dev); |
1da177e4 LT |
650 | } |
651 | ||
9e89dde2 ZR |
652 | /* -------------------------------------------------------------------------- |
653 | Driver Management | |
654 | -------------------------------------------------------------------------- */ | |
1da177e4 | 655 | /** |
d758a8fa RD |
656 | * acpi_bus_driver_init - add a device to a driver |
657 | * @device: the device to add and initialize | |
658 | * @driver: driver for the device | |
659 | * | |
0c526d96 | 660 | * Used to initialize a device via its device driver. Called whenever a |
1890a97a | 661 | * driver is bound to a device. Invokes the driver's add() ops. |
1da177e4 LT |
662 | */ |
663 | static int | |
4be44fcd | 664 | acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) |
1da177e4 | 665 | { |
4be44fcd | 666 | int result = 0; |
1da177e4 | 667 | |
1da177e4 | 668 | if (!device || !driver) |
d550d98d | 669 | return -EINVAL; |
1da177e4 LT |
670 | |
671 | if (!driver->ops.add) | |
d550d98d | 672 | return -ENOSYS; |
1da177e4 LT |
673 | |
674 | result = driver->ops.add(device); | |
675 | if (result) { | |
676 | device->driver = NULL; | |
db89b4f0 | 677 | device->driver_data = NULL; |
d550d98d | 678 | return result; |
1da177e4 LT |
679 | } |
680 | ||
681 | device->driver = driver; | |
682 | ||
683 | /* | |
684 | * TBD - Configuration Management: Assign resources to device based | |
685 | * upon possible configuration and currently allocated resources. | |
686 | */ | |
687 | ||
4be44fcd LB |
688 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
689 | "Driver successfully bound to device\n")); | |
d550d98d | 690 | return 0; |
3fb02738 RS |
691 | } |
692 | ||
8713cbef | 693 | static int acpi_start_single_object(struct acpi_device *device) |
3fb02738 RS |
694 | { |
695 | int result = 0; | |
696 | struct acpi_driver *driver; | |
697 | ||
3fb02738 RS |
698 | |
699 | if (!(driver = device->driver)) | |
d550d98d | 700 | return 0; |
3fb02738 | 701 | |
1da177e4 LT |
702 | if (driver->ops.start) { |
703 | result = driver->ops.start(device); | |
704 | if (result && driver->ops.remove) | |
705 | driver->ops.remove(device, ACPI_BUS_REMOVAL_NORMAL); | |
1da177e4 LT |
706 | } |
707 | ||
d550d98d | 708 | return result; |
1da177e4 LT |
709 | } |
710 | ||
9e89dde2 ZR |
711 | /** |
712 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
713 | * @driver: driver being registered | |
714 | * | |
715 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
716 | * devices that match the driver's criteria and binds. Returns zero for | |
717 | * success or a negative error status for failure. | |
718 | */ | |
719 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
1da177e4 | 720 | { |
1890a97a | 721 | int ret; |
1da177e4 | 722 | |
9e89dde2 ZR |
723 | if (acpi_disabled) |
724 | return -ENODEV; | |
1890a97a PM |
725 | driver->drv.name = driver->name; |
726 | driver->drv.bus = &acpi_bus_type; | |
727 | driver->drv.owner = driver->owner; | |
1da177e4 | 728 | |
1890a97a PM |
729 | ret = driver_register(&driver->drv); |
730 | return ret; | |
9e89dde2 | 731 | } |
1da177e4 | 732 | |
9e89dde2 ZR |
733 | EXPORT_SYMBOL(acpi_bus_register_driver); |
734 | ||
735 | /** | |
736 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus | |
737 | * @driver: driver to unregister | |
738 | * | |
739 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
740 | * devices that match the driver's criteria and unbinds. | |
741 | */ | |
742 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
743 | { | |
1890a97a | 744 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
745 | } |
746 | ||
747 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
748 | ||
9e89dde2 ZR |
749 | /* -------------------------------------------------------------------------- |
750 | Device Enumeration | |
751 | -------------------------------------------------------------------------- */ | |
5c478f49 BH |
752 | static struct acpi_device *acpi_bus_get_parent(acpi_handle handle) |
753 | { | |
754 | acpi_status status; | |
755 | int ret; | |
756 | struct acpi_device *device; | |
757 | ||
758 | /* | |
759 | * Fixed hardware devices do not appear in the namespace and do not | |
760 | * have handles, but we fabricate acpi_devices for them, so we have | |
761 | * to deal with them specially. | |
762 | */ | |
763 | if (handle == NULL) | |
764 | return acpi_root; | |
765 | ||
766 | do { | |
767 | status = acpi_get_parent(handle, &handle); | |
768 | if (status == AE_NULL_ENTRY) | |
769 | return NULL; | |
770 | if (ACPI_FAILURE(status)) | |
771 | return acpi_root; | |
772 | ||
773 | ret = acpi_bus_get_device(handle, &device); | |
774 | if (ret == 0) | |
775 | return device; | |
776 | } while (1); | |
777 | } | |
778 | ||
9e89dde2 ZR |
779 | acpi_status |
780 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
781 | { | |
782 | acpi_status status; | |
783 | acpi_handle tmp; | |
784 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
785 | union acpi_object *obj; | |
786 | ||
787 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
788 | if (ACPI_FAILURE(status)) | |
789 | return status; | |
790 | ||
791 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
792 | if (ACPI_SUCCESS(status)) { | |
793 | obj = buffer.pointer; | |
3b5fee59 HM |
794 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
795 | ejd); | |
9e89dde2 ZR |
796 | kfree(buffer.pointer); |
797 | } | |
798 | return status; | |
799 | } | |
800 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
801 | ||
8e4319c4 | 802 | void acpi_bus_data_handler(acpi_handle handle, void *context) |
9e89dde2 ZR |
803 | { |
804 | ||
805 | /* TBD */ | |
806 | ||
807 | return; | |
808 | } | |
809 | ||
9e89dde2 ZR |
810 | static int acpi_bus_get_perf_flags(struct acpi_device *device) |
811 | { | |
812 | device->performance.state = ACPI_STATE_UNKNOWN; | |
813 | return 0; | |
814 | } | |
815 | ||
816 | static acpi_status | |
b581a7f9 RW |
817 | acpi_bus_extract_wakeup_device_power_package(acpi_handle handle, |
818 | struct acpi_device_wakeup *wakeup) | |
9e89dde2 | 819 | { |
b581a7f9 RW |
820 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
821 | union acpi_object *package = NULL; | |
9e89dde2 | 822 | union acpi_object *element = NULL; |
b581a7f9 RW |
823 | acpi_status status; |
824 | int i = 0; | |
9e89dde2 | 825 | |
b581a7f9 | 826 | if (!wakeup) |
9e89dde2 ZR |
827 | return AE_BAD_PARAMETER; |
828 | ||
b581a7f9 RW |
829 | /* _PRW */ |
830 | status = acpi_evaluate_object(handle, "_PRW", NULL, &buffer); | |
831 | if (ACPI_FAILURE(status)) { | |
832 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
833 | return status; | |
834 | } | |
835 | ||
836 | package = (union acpi_object *)buffer.pointer; | |
837 | ||
838 | if (!package || (package->package.count < 2)) { | |
839 | status = AE_BAD_DATA; | |
840 | goto out; | |
841 | } | |
842 | ||
9e89dde2 | 843 | element = &(package->package.elements[0]); |
b581a7f9 RW |
844 | if (!element) { |
845 | status = AE_BAD_DATA; | |
846 | goto out; | |
847 | } | |
9e89dde2 ZR |
848 | if (element->type == ACPI_TYPE_PACKAGE) { |
849 | if ((element->package.count < 2) || | |
850 | (element->package.elements[0].type != | |
851 | ACPI_TYPE_LOCAL_REFERENCE) | |
b581a7f9 RW |
852 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) { |
853 | status = AE_BAD_DATA; | |
854 | goto out; | |
855 | } | |
856 | wakeup->gpe_device = | |
9e89dde2 | 857 | element->package.elements[0].reference.handle; |
b581a7f9 | 858 | wakeup->gpe_number = |
9e89dde2 ZR |
859 | (u32) element->package.elements[1].integer.value; |
860 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
b581a7f9 RW |
861 | wakeup->gpe_device = NULL; |
862 | wakeup->gpe_number = element->integer.value; | |
863 | } else { | |
864 | status = AE_BAD_DATA; | |
865 | goto out; | |
866 | } | |
9e89dde2 ZR |
867 | |
868 | element = &(package->package.elements[1]); | |
869 | if (element->type != ACPI_TYPE_INTEGER) { | |
b581a7f9 RW |
870 | status = AE_BAD_DATA; |
871 | goto out; | |
9e89dde2 | 872 | } |
b581a7f9 | 873 | wakeup->sleep_state = element->integer.value; |
9e89dde2 ZR |
874 | |
875 | if ((package->package.count - 2) > ACPI_MAX_HANDLES) { | |
b581a7f9 RW |
876 | status = AE_NO_MEMORY; |
877 | goto out; | |
9e89dde2 | 878 | } |
b581a7f9 RW |
879 | wakeup->resources.count = package->package.count - 2; |
880 | for (i = 0; i < wakeup->resources.count; i++) { | |
9e89dde2 | 881 | element = &(package->package.elements[i + 2]); |
b581a7f9 RW |
882 | if (element->type != ACPI_TYPE_LOCAL_REFERENCE) { |
883 | status = AE_BAD_DATA; | |
884 | goto out; | |
885 | } | |
9e89dde2 | 886 | |
b581a7f9 | 887 | wakeup->resources.handles[i] = element->reference.handle; |
1da177e4 | 888 | } |
9e89dde2 | 889 | |
bba63a29 | 890 | acpi_setup_gpe_for_wake(handle, wakeup->gpe_device, wakeup->gpe_number); |
9874647b | 891 | |
b581a7f9 RW |
892 | out: |
893 | kfree(buffer.pointer); | |
894 | ||
895 | return status; | |
1da177e4 LT |
896 | } |
897 | ||
f517709d | 898 | static void acpi_bus_set_run_wake_flags(struct acpi_device *device) |
1da177e4 | 899 | { |
29b71a1c TR |
900 | struct acpi_device_id button_device_ids[] = { |
901 | {"PNP0C0D", 0}, | |
902 | {"PNP0C0C", 0}, | |
903 | {"PNP0C0E", 0}, | |
904 | {"", 0}, | |
905 | }; | |
f517709d RW |
906 | acpi_status status; |
907 | acpi_event_status event_status; | |
908 | ||
b67ea761 | 909 | device->wakeup.flags.notifier_present = 0; |
f517709d RW |
910 | |
911 | /* Power button, Lid switch always enable wakeup */ | |
912 | if (!acpi_match_device_ids(device, button_device_ids)) { | |
913 | device->wakeup.flags.run_wake = 1; | |
f2b56bc8 | 914 | device_set_wakeup_capable(&device->dev, true); |
f517709d RW |
915 | return; |
916 | } | |
917 | ||
e8e18c95 RW |
918 | status = acpi_get_gpe_status(device->wakeup.gpe_device, |
919 | device->wakeup.gpe_number, | |
920 | &event_status); | |
f517709d RW |
921 | if (status == AE_OK) |
922 | device->wakeup.flags.run_wake = | |
923 | !!(event_status & ACPI_EVENT_FLAG_HANDLE); | |
924 | } | |
925 | ||
d57d09a4 | 926 | static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
f517709d | 927 | { |
d57d09a4 | 928 | acpi_handle temp; |
f517709d | 929 | acpi_status status = 0; |
f517709d | 930 | int psw_error; |
29b71a1c | 931 | |
d57d09a4 RW |
932 | /* Presence of _PRW indicates wake capable */ |
933 | status = acpi_get_handle(device->handle, "_PRW", &temp); | |
934 | if (ACPI_FAILURE(status)) | |
935 | return; | |
936 | ||
b581a7f9 RW |
937 | status = acpi_bus_extract_wakeup_device_power_package(device->handle, |
938 | &device->wakeup); | |
9e89dde2 ZR |
939 | if (ACPI_FAILURE(status)) { |
940 | ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package")); | |
d57d09a4 | 941 | return; |
9e89dde2 | 942 | } |
1da177e4 | 943 | |
9e89dde2 | 944 | device->wakeup.flags.valid = 1; |
9b83ccd2 | 945 | device->wakeup.prepare_count = 0; |
f517709d | 946 | acpi_bus_set_run_wake_flags(device); |
729b2bdb ZY |
947 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
948 | * system for the ACPI device with the _PRW object. | |
949 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. | |
950 | * So it is necessary to call _DSW object first. Only when it is not | |
951 | * present will the _PSW object used. | |
952 | */ | |
77e76609 RW |
953 | psw_error = acpi_device_sleep_wake(device, 0, 0, 0); |
954 | if (psw_error) | |
955 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
956 | "error in _DSW or _PSW evaluation\n")); | |
1da177e4 | 957 | } |
1da177e4 | 958 | |
bf325f95 RW |
959 | static void acpi_bus_add_power_resource(acpi_handle handle); |
960 | ||
9e89dde2 | 961 | static int acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 962 | { |
9e89dde2 ZR |
963 | acpi_status status = 0; |
964 | acpi_handle handle = NULL; | |
965 | u32 i = 0; | |
1a365616 | 966 | |
4be44fcd | 967 | |
9e89dde2 ZR |
968 | /* |
969 | * Power Management Flags | |
970 | */ | |
971 | status = acpi_get_handle(device->handle, "_PSC", &handle); | |
972 | if (ACPI_SUCCESS(status)) | |
973 | device->power.flags.explicit_get = 1; | |
974 | status = acpi_get_handle(device->handle, "_IRC", &handle); | |
975 | if (ACPI_SUCCESS(status)) | |
976 | device->power.flags.inrush_current = 1; | |
1da177e4 | 977 | |
9e89dde2 ZR |
978 | /* |
979 | * Enumerate supported power management states | |
980 | */ | |
1cc0c998 | 981 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) { |
9e89dde2 ZR |
982 | struct acpi_device_power_state *ps = &device->power.states[i]; |
983 | char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' }; | |
1da177e4 | 984 | |
9e89dde2 ZR |
985 | /* Evaluate "_PRx" to se if power resources are referenced */ |
986 | acpi_evaluate_reference(device->handle, object_name, NULL, | |
987 | &ps->resources); | |
988 | if (ps->resources.count) { | |
bf325f95 RW |
989 | int j; |
990 | ||
9e89dde2 | 991 | device->power.flags.power_resources = 1; |
bf325f95 RW |
992 | for (j = 0; j < ps->resources.count; j++) |
993 | acpi_bus_add_power_resource(ps->resources.handles[j]); | |
1da177e4 | 994 | } |
1da177e4 | 995 | |
9e89dde2 ZR |
996 | /* Evaluate "_PSx" to see if we can do explicit sets */ |
997 | object_name[2] = 'S'; | |
998 | status = acpi_get_handle(device->handle, object_name, &handle); | |
37239978 | 999 | if (ACPI_SUCCESS(status)) |
9e89dde2 | 1000 | ps->flags.explicit_set = 1; |
1da177e4 | 1001 | |
1cc0c998 LM |
1002 | /* |
1003 | * State is valid if there are means to put the device into it. | |
1004 | * D3hot is only valid if _PR3 present. | |
1005 | */ | |
1006 | if (ps->resources.count || | |
1007 | (ps->flags.explicit_set && i < ACPI_STATE_D3_HOT)) | |
9e89dde2 | 1008 | ps->flags.valid = 1; |
1da177e4 | 1009 | |
9e89dde2 ZR |
1010 | ps->power = -1; /* Unknown - driver assigned */ |
1011 | ps->latency = -1; /* Unknown - driver assigned */ | |
1012 | } | |
1da177e4 | 1013 | |
9e89dde2 ZR |
1014 | /* Set defaults for D0 and D3 states (always valid) */ |
1015 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
1016 | device->power.states[ACPI_STATE_D0].power = 100; | |
1017 | device->power.states[ACPI_STATE_D3].flags.valid = 1; | |
1018 | device->power.states[ACPI_STATE_D3].power = 0; | |
c8f7a62c | 1019 | |
5c7dd710 RW |
1020 | /* Set D3cold's explicit_set flag if _PS3 exists. */ |
1021 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set) | |
1022 | device->power.states[ACPI_STATE_D3_COLD].flags.explicit_set = 1; | |
1023 | ||
ade3e7fe | 1024 | acpi_bus_init_power(device); |
c8f7a62c | 1025 | |
9e89dde2 ZR |
1026 | return 0; |
1027 | } | |
c8f7a62c | 1028 | |
4be44fcd | 1029 | static int acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 1030 | { |
4be44fcd LB |
1031 | acpi_status status = AE_OK; |
1032 | acpi_handle temp = NULL; | |
1da177e4 | 1033 | |
1da177e4 LT |
1034 | |
1035 | /* Presence of _STA indicates 'dynamic_status' */ | |
1036 | status = acpi_get_handle(device->handle, "_STA", &temp); | |
1037 | if (ACPI_SUCCESS(status)) | |
1038 | device->flags.dynamic_status = 1; | |
1039 | ||
1da177e4 LT |
1040 | /* Presence of _RMV indicates 'removable' */ |
1041 | status = acpi_get_handle(device->handle, "_RMV", &temp); | |
1042 | if (ACPI_SUCCESS(status)) | |
1043 | device->flags.removable = 1; | |
1044 | ||
1045 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
1046 | status = acpi_get_handle(device->handle, "_EJD", &temp); | |
1047 | if (ACPI_SUCCESS(status)) | |
1048 | device->flags.ejectable = 1; | |
1049 | else { | |
1050 | status = acpi_get_handle(device->handle, "_EJ0", &temp); | |
1051 | if (ACPI_SUCCESS(status)) | |
1052 | device->flags.ejectable = 1; | |
1053 | } | |
1054 | ||
1055 | /* Presence of _LCK indicates 'lockable' */ | |
1056 | status = acpi_get_handle(device->handle, "_LCK", &temp); | |
1057 | if (ACPI_SUCCESS(status)) | |
1058 | device->flags.lockable = 1; | |
1059 | ||
7bed50c5 RW |
1060 | /* Power resources cannot be power manageable. */ |
1061 | if (device->device_type == ACPI_BUS_TYPE_POWER) | |
1062 | return 0; | |
1063 | ||
1da177e4 LT |
1064 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ |
1065 | status = acpi_get_handle(device->handle, "_PS0", &temp); | |
1066 | if (ACPI_FAILURE(status)) | |
1067 | status = acpi_get_handle(device->handle, "_PR0", &temp); | |
1068 | if (ACPI_SUCCESS(status)) | |
1069 | device->flags.power_manageable = 1; | |
1070 | ||
3c5f9be4 | 1071 | /* TBD: Performance management */ |
1da177e4 | 1072 | |
d550d98d | 1073 | return 0; |
1da177e4 LT |
1074 | } |
1075 | ||
c7bcb4e9 | 1076 | static void acpi_device_get_busid(struct acpi_device *device) |
1da177e4 | 1077 | { |
4be44fcd LB |
1078 | char bus_id[5] = { '?', 0 }; |
1079 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
1080 | int i = 0; | |
1da177e4 LT |
1081 | |
1082 | /* | |
1083 | * Bus ID | |
1084 | * ------ | |
1085 | * The device's Bus ID is simply the object name. | |
1086 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
1087 | */ | |
859ac9a4 | 1088 | if (ACPI_IS_ROOT_DEVICE(device)) { |
1da177e4 | 1089 | strcpy(device->pnp.bus_id, "ACPI"); |
859ac9a4 BH |
1090 | return; |
1091 | } | |
1092 | ||
1093 | switch (device->device_type) { | |
1da177e4 LT |
1094 | case ACPI_BUS_TYPE_POWER_BUTTON: |
1095 | strcpy(device->pnp.bus_id, "PWRF"); | |
1096 | break; | |
1097 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
1098 | strcpy(device->pnp.bus_id, "SLPF"); | |
1099 | break; | |
1100 | default: | |
66b7ed40 | 1101 | acpi_get_name(device->handle, ACPI_SINGLE_NAME, &buffer); |
1da177e4 LT |
1102 | /* Clean up trailing underscores (if any) */ |
1103 | for (i = 3; i > 1; i--) { | |
1104 | if (bus_id[i] == '_') | |
1105 | bus_id[i] = '\0'; | |
1106 | else | |
1107 | break; | |
1108 | } | |
1109 | strcpy(device->pnp.bus_id, bus_id); | |
1110 | break; | |
1111 | } | |
1112 | } | |
1113 | ||
54735266 ZR |
1114 | /* |
1115 | * acpi_bay_match - see if a device is an ejectable driver bay | |
1116 | * | |
1117 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
1118 | * then we can safely call it an ejectable drive bay | |
1119 | */ | |
1120 | static int acpi_bay_match(struct acpi_device *device){ | |
1121 | acpi_status status; | |
1122 | acpi_handle handle; | |
1123 | acpi_handle tmp; | |
1124 | acpi_handle phandle; | |
1125 | ||
1126 | handle = device->handle; | |
1127 | ||
1128 | status = acpi_get_handle(handle, "_EJ0", &tmp); | |
1129 | if (ACPI_FAILURE(status)) | |
1130 | return -ENODEV; | |
1131 | ||
1132 | if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || | |
1133 | (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || | |
1134 | (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || | |
1135 | (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) | |
1136 | return 0; | |
1137 | ||
1138 | if (acpi_get_parent(handle, &phandle)) | |
1139 | return -ENODEV; | |
1140 | ||
1141 | if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) || | |
1142 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) || | |
1143 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) || | |
1144 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp)))) | |
1145 | return 0; | |
1146 | ||
1147 | return -ENODEV; | |
1148 | } | |
1149 | ||
3620f2f2 FS |
1150 | /* |
1151 | * acpi_dock_match - see if a device has a _DCK method | |
1152 | */ | |
1153 | static int acpi_dock_match(struct acpi_device *device) | |
1154 | { | |
1155 | acpi_handle tmp; | |
1156 | return acpi_get_handle(device->handle, "_DCK", &tmp); | |
1157 | } | |
1158 | ||
620e112c | 1159 | const char *acpi_device_hid(struct acpi_device *device) |
15b8dd53 | 1160 | { |
7f47fa6c | 1161 | struct acpi_hardware_id *hid; |
15b8dd53 | 1162 | |
2b2ae7c7 TR |
1163 | if (list_empty(&device->pnp.ids)) |
1164 | return dummy_hid; | |
1165 | ||
7f47fa6c BH |
1166 | hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list); |
1167 | return hid->id; | |
1168 | } | |
1169 | EXPORT_SYMBOL(acpi_device_hid); | |
15b8dd53 | 1170 | |
7f47fa6c BH |
1171 | static void acpi_add_id(struct acpi_device *device, const char *dev_id) |
1172 | { | |
1173 | struct acpi_hardware_id *id; | |
15b8dd53 | 1174 | |
7f47fa6c BH |
1175 | id = kmalloc(sizeof(*id), GFP_KERNEL); |
1176 | if (!id) | |
1177 | return; | |
15b8dd53 | 1178 | |
581de59e | 1179 | id->id = kstrdup(dev_id, GFP_KERNEL); |
7f47fa6c BH |
1180 | if (!id->id) { |
1181 | kfree(id); | |
1182 | return; | |
15b8dd53 BM |
1183 | } |
1184 | ||
7f47fa6c | 1185 | list_add_tail(&id->list, &device->pnp.ids); |
15b8dd53 BM |
1186 | } |
1187 | ||
222e82ac DW |
1188 | /* |
1189 | * Old IBM workstations have a DSDT bug wherein the SMBus object | |
1190 | * lacks the SMBUS01 HID and the methods do not have the necessary "_" | |
1191 | * prefix. Work around this. | |
1192 | */ | |
1193 | static int acpi_ibm_smbus_match(struct acpi_device *device) | |
1194 | { | |
1195 | acpi_handle h_dummy; | |
1196 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
1197 | int result; | |
1198 | ||
1199 | if (!dmi_name_in_vendors("IBM")) | |
1200 | return -ENODEV; | |
1201 | ||
1202 | /* Look for SMBS object */ | |
1203 | result = acpi_get_name(device->handle, ACPI_SINGLE_NAME, &path); | |
1204 | if (result) | |
1205 | return result; | |
1206 | ||
1207 | if (strcmp("SMBS", path.pointer)) { | |
1208 | result = -ENODEV; | |
1209 | goto out; | |
1210 | } | |
1211 | ||
1212 | /* Does it have the necessary (but misnamed) methods? */ | |
1213 | result = -ENODEV; | |
1214 | if (ACPI_SUCCESS(acpi_get_handle(device->handle, "SBI", &h_dummy)) && | |
1215 | ACPI_SUCCESS(acpi_get_handle(device->handle, "SBR", &h_dummy)) && | |
1216 | ACPI_SUCCESS(acpi_get_handle(device->handle, "SBW", &h_dummy))) | |
1217 | result = 0; | |
1218 | out: | |
1219 | kfree(path.pointer); | |
1220 | return result; | |
1221 | } | |
1222 | ||
c7bcb4e9 | 1223 | static void acpi_device_set_id(struct acpi_device *device) |
1da177e4 | 1224 | { |
4be44fcd | 1225 | acpi_status status; |
57f3674f BH |
1226 | struct acpi_device_info *info; |
1227 | struct acpica_device_id_list *cid_list; | |
7f47fa6c | 1228 | int i; |
1da177e4 | 1229 | |
c7bcb4e9 | 1230 | switch (device->device_type) { |
1da177e4 | 1231 | case ACPI_BUS_TYPE_DEVICE: |
859ac9a4 | 1232 | if (ACPI_IS_ROOT_DEVICE(device)) { |
57f3674f | 1233 | acpi_add_id(device, ACPI_SYSTEM_HID); |
859ac9a4 BH |
1234 | break; |
1235 | } | |
1236 | ||
66b7ed40 | 1237 | status = acpi_get_object_info(device->handle, &info); |
1da177e4 | 1238 | if (ACPI_FAILURE(status)) { |
96b2dd1f | 1239 | printk(KERN_ERR PREFIX "%s: Error reading device info\n", __func__); |
1da177e4 LT |
1240 | return; |
1241 | } | |
1242 | ||
1da177e4 | 1243 | if (info->valid & ACPI_VALID_HID) |
57f3674f BH |
1244 | acpi_add_id(device, info->hardware_id.string); |
1245 | if (info->valid & ACPI_VALID_CID) { | |
15b8dd53 | 1246 | cid_list = &info->compatible_id_list; |
57f3674f BH |
1247 | for (i = 0; i < cid_list->count; i++) |
1248 | acpi_add_id(device, cid_list->ids[i].string); | |
1249 | } | |
1da177e4 LT |
1250 | if (info->valid & ACPI_VALID_ADR) { |
1251 | device->pnp.bus_address = info->address; | |
1252 | device->flags.bus_address = 1; | |
1253 | } | |
ae843332 | 1254 | |
a83893ae BH |
1255 | kfree(info); |
1256 | ||
57f3674f BH |
1257 | /* |
1258 | * Some devices don't reliably have _HIDs & _CIDs, so add | |
1259 | * synthetic HIDs to make sure drivers can find them. | |
1260 | */ | |
c3d6de69 | 1261 | if (acpi_is_video_device(device)) |
57f3674f | 1262 | acpi_add_id(device, ACPI_VIDEO_HID); |
3620f2f2 | 1263 | else if (ACPI_SUCCESS(acpi_bay_match(device))) |
57f3674f | 1264 | acpi_add_id(device, ACPI_BAY_HID); |
3620f2f2 | 1265 | else if (ACPI_SUCCESS(acpi_dock_match(device))) |
57f3674f | 1266 | acpi_add_id(device, ACPI_DOCK_HID); |
222e82ac DW |
1267 | else if (!acpi_ibm_smbus_match(device)) |
1268 | acpi_add_id(device, ACPI_SMBUS_IBM_HID); | |
b7b30de5 BH |
1269 | else if (!acpi_device_hid(device) && |
1270 | ACPI_IS_ROOT_DEVICE(device->parent)) { | |
1271 | acpi_add_id(device, ACPI_BUS_HID); /* \_SB, LNXSYBUS */ | |
1272 | strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME); | |
1273 | strcpy(device->pnp.device_class, ACPI_BUS_CLASS); | |
1274 | } | |
54735266 | 1275 | |
1da177e4 LT |
1276 | break; |
1277 | case ACPI_BUS_TYPE_POWER: | |
57f3674f | 1278 | acpi_add_id(device, ACPI_POWER_HID); |
1da177e4 LT |
1279 | break; |
1280 | case ACPI_BUS_TYPE_PROCESSOR: | |
57f3674f | 1281 | acpi_add_id(device, ACPI_PROCESSOR_OBJECT_HID); |
1da177e4 | 1282 | break; |
1da177e4 | 1283 | case ACPI_BUS_TYPE_THERMAL: |
57f3674f | 1284 | acpi_add_id(device, ACPI_THERMAL_HID); |
1da177e4 LT |
1285 | break; |
1286 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
57f3674f | 1287 | acpi_add_id(device, ACPI_BUTTON_HID_POWERF); |
1da177e4 LT |
1288 | break; |
1289 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
57f3674f | 1290 | acpi_add_id(device, ACPI_BUTTON_HID_SLEEPF); |
1da177e4 LT |
1291 | break; |
1292 | } | |
1da177e4 LT |
1293 | } |
1294 | ||
bc3b0772 | 1295 | static int acpi_device_set_context(struct acpi_device *device) |
1da177e4 | 1296 | { |
bc3b0772 BH |
1297 | acpi_status status; |
1298 | ||
1da177e4 LT |
1299 | /* |
1300 | * Context | |
1301 | * ------- | |
1302 | * Attach this 'struct acpi_device' to the ACPI object. This makes | |
bc3b0772 BH |
1303 | * resolutions from handle->device very efficient. Fixed hardware |
1304 | * devices have no handles, so we skip them. | |
1da177e4 | 1305 | */ |
bc3b0772 BH |
1306 | if (!device->handle) |
1307 | return 0; | |
1da177e4 | 1308 | |
bc3b0772 BH |
1309 | status = acpi_attach_data(device->handle, |
1310 | acpi_bus_data_handler, device); | |
1311 | if (ACPI_SUCCESS(status)) | |
1312 | return 0; | |
1313 | ||
1314 | printk(KERN_ERR PREFIX "Error attaching device data\n"); | |
1315 | return -ENODEV; | |
1da177e4 LT |
1316 | } |
1317 | ||
4be44fcd | 1318 | static int acpi_bus_remove(struct acpi_device *dev, int rmdevice) |
1da177e4 | 1319 | { |
1da177e4 | 1320 | if (!dev) |
d550d98d | 1321 | return -EINVAL; |
1da177e4 | 1322 | |
96333578 | 1323 | dev->removal_type = ACPI_BUS_REMOVAL_EJECT; |
1890a97a | 1324 | device_release_driver(&dev->dev); |
1da177e4 LT |
1325 | |
1326 | if (!rmdevice) | |
d550d98d | 1327 | return 0; |
1da177e4 | 1328 | |
2786f6e3 RZ |
1329 | /* |
1330 | * unbind _ADR-Based Devices when hot removal | |
1331 | */ | |
1da177e4 LT |
1332 | if (dev->flags.bus_address) { |
1333 | if ((dev->parent) && (dev->parent->ops.unbind)) | |
1334 | dev->parent->ops.unbind(dev); | |
1335 | } | |
1da177e4 LT |
1336 | acpi_device_unregister(dev, ACPI_BUS_REMOVAL_EJECT); |
1337 | ||
d550d98d | 1338 | return 0; |
1da177e4 LT |
1339 | } |
1340 | ||
5c478f49 BH |
1341 | static int acpi_add_single_object(struct acpi_device **child, |
1342 | acpi_handle handle, int type, | |
778cbc1d | 1343 | unsigned long long sta, |
5c478f49 | 1344 | struct acpi_bus_ops *ops) |
1da177e4 | 1345 | { |
77c24888 BH |
1346 | int result; |
1347 | struct acpi_device *device; | |
29aaefa6 | 1348 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 1349 | |
36bcbec7 | 1350 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 1351 | if (!device) { |
6468463a | 1352 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 1353 | return -ENOMEM; |
1da177e4 | 1354 | } |
1da177e4 | 1355 | |
7f47fa6c | 1356 | INIT_LIST_HEAD(&device->pnp.ids); |
caaa6efb | 1357 | device->device_type = type; |
1da177e4 | 1358 | device->handle = handle; |
5c478f49 | 1359 | device->parent = acpi_bus_get_parent(handle); |
c4168bff | 1360 | device->bus_ops = *ops; /* workround for not call .start */ |
778cbc1d | 1361 | STRUCT_TO_INT(device->status) = sta; |
c4168bff | 1362 | |
c7bcb4e9 | 1363 | acpi_device_get_busid(device); |
1da177e4 LT |
1364 | |
1365 | /* | |
1366 | * Flags | |
1367 | * ----- | |
778cbc1d BH |
1368 | * Note that we only look for object handles -- cannot evaluate objects |
1369 | * until we know the device is present and properly initialized. | |
1da177e4 LT |
1370 | */ |
1371 | result = acpi_bus_get_flags(device); | |
1372 | if (result) | |
1373 | goto end; | |
1374 | ||
1da177e4 LT |
1375 | /* |
1376 | * Initialize Device | |
1377 | * ----------------- | |
1378 | * TBD: Synch with Core's enumeration/initialization process. | |
1379 | */ | |
c7bcb4e9 | 1380 | acpi_device_set_id(device); |
1da177e4 LT |
1381 | |
1382 | /* | |
1383 | * Power Management | |
1384 | * ---------------- | |
1385 | */ | |
1386 | if (device->flags.power_manageable) { | |
1387 | result = acpi_bus_get_power_flags(device); | |
1388 | if (result) | |
1389 | goto end; | |
1390 | } | |
1391 | ||
4be44fcd | 1392 | /* |
1da177e4 LT |
1393 | * Wakeup device management |
1394 | *----------------------- | |
1395 | */ | |
d57d09a4 | 1396 | acpi_bus_get_wakeup_device_flags(device); |
1da177e4 LT |
1397 | |
1398 | /* | |
1399 | * Performance Management | |
1400 | * ---------------------- | |
1401 | */ | |
1402 | if (device->flags.performance_manageable) { | |
1403 | result = acpi_bus_get_perf_flags(device); | |
1404 | if (result) | |
1405 | goto end; | |
1406 | } | |
1407 | ||
bc3b0772 | 1408 | if ((result = acpi_device_set_context(device))) |
f61f9258 | 1409 | goto end; |
1da177e4 | 1410 | |
66b7ed40 | 1411 | result = acpi_device_register(device); |
1da177e4 LT |
1412 | |
1413 | /* | |
2786f6e3 | 1414 | * Bind _ADR-Based Devices when hot add |
1da177e4 LT |
1415 | */ |
1416 | if (device->flags.bus_address) { | |
1417 | if (device->parent && device->parent->ops.bind) | |
1418 | device->parent->ops.bind(device); | |
1419 | } | |
1420 | ||
0c526d96 | 1421 | end: |
29aaefa6 BH |
1422 | if (!result) { |
1423 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1424 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
1425 | "Adding %s [%s] parent %s\n", dev_name(&device->dev), | |
1426 | (char *) buffer.pointer, | |
1427 | device->parent ? dev_name(&device->parent->dev) : | |
1428 | "(null)")); | |
1429 | kfree(buffer.pointer); | |
1da177e4 | 1430 | *child = device; |
29aaefa6 | 1431 | } else |
718fb0de | 1432 | acpi_device_release(&device->dev); |
1da177e4 | 1433 | |
d550d98d | 1434 | return result; |
1da177e4 | 1435 | } |
1da177e4 | 1436 | |
778cbc1d BH |
1437 | #define ACPI_STA_DEFAULT (ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | \ |
1438 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING) | |
1439 | ||
bf325f95 RW |
1440 | static void acpi_bus_add_power_resource(acpi_handle handle) |
1441 | { | |
1442 | struct acpi_bus_ops ops = { | |
1443 | .acpi_op_add = 1, | |
1444 | .acpi_op_start = 1, | |
1445 | }; | |
1446 | struct acpi_device *device = NULL; | |
1447 | ||
1448 | acpi_bus_get_device(handle, &device); | |
1449 | if (!device) | |
1450 | acpi_add_single_object(&device, handle, ACPI_BUS_TYPE_POWER, | |
1451 | ACPI_STA_DEFAULT, &ops); | |
1452 | } | |
1453 | ||
778cbc1d BH |
1454 | static int acpi_bus_type_and_status(acpi_handle handle, int *type, |
1455 | unsigned long long *sta) | |
1da177e4 | 1456 | { |
778cbc1d BH |
1457 | acpi_status status; |
1458 | acpi_object_type acpi_type; | |
1da177e4 | 1459 | |
778cbc1d | 1460 | status = acpi_get_type(handle, &acpi_type); |
51a85faf | 1461 | if (ACPI_FAILURE(status)) |
778cbc1d | 1462 | return -ENODEV; |
4be44fcd | 1463 | |
778cbc1d | 1464 | switch (acpi_type) { |
51a85faf BH |
1465 | case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */ |
1466 | case ACPI_TYPE_DEVICE: | |
778cbc1d BH |
1467 | *type = ACPI_BUS_TYPE_DEVICE; |
1468 | status = acpi_bus_get_status_handle(handle, sta); | |
1469 | if (ACPI_FAILURE(status)) | |
1470 | return -ENODEV; | |
51a85faf BH |
1471 | break; |
1472 | case ACPI_TYPE_PROCESSOR: | |
778cbc1d BH |
1473 | *type = ACPI_BUS_TYPE_PROCESSOR; |
1474 | status = acpi_bus_get_status_handle(handle, sta); | |
1475 | if (ACPI_FAILURE(status)) | |
1476 | return -ENODEV; | |
51a85faf BH |
1477 | break; |
1478 | case ACPI_TYPE_THERMAL: | |
778cbc1d BH |
1479 | *type = ACPI_BUS_TYPE_THERMAL; |
1480 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1481 | break; |
1482 | case ACPI_TYPE_POWER: | |
778cbc1d BH |
1483 | *type = ACPI_BUS_TYPE_POWER; |
1484 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1485 | break; |
1486 | default: | |
778cbc1d | 1487 | return -ENODEV; |
51a85faf | 1488 | } |
1da177e4 | 1489 | |
778cbc1d BH |
1490 | return 0; |
1491 | } | |
1492 | ||
1493 | static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl, | |
1494 | void *context, void **return_value) | |
1495 | { | |
1496 | struct acpi_bus_ops *ops = context; | |
778cbc1d BH |
1497 | int type; |
1498 | unsigned long long sta; | |
e3b87f8a BH |
1499 | struct acpi_device *device; |
1500 | acpi_status status; | |
778cbc1d BH |
1501 | int result; |
1502 | ||
1503 | result = acpi_bus_type_and_status(handle, &type, &sta); | |
1504 | if (result) | |
1505 | return AE_OK; | |
1506 | ||
1507 | if (!(sta & ACPI_STA_DEVICE_PRESENT) && | |
b581a7f9 | 1508 | !(sta & ACPI_STA_DEVICE_FUNCTIONING)) { |
86e4e20e RW |
1509 | struct acpi_device_wakeup wakeup; |
1510 | acpi_handle temp; | |
1511 | ||
1512 | status = acpi_get_handle(handle, "_PRW", &temp); | |
1513 | if (ACPI_SUCCESS(status)) | |
1514 | acpi_bus_extract_wakeup_device_power_package(handle, | |
1515 | &wakeup); | |
778cbc1d | 1516 | return AE_CTRL_DEPTH; |
b581a7f9 | 1517 | } |
778cbc1d | 1518 | |
e3b87f8a BH |
1519 | /* |
1520 | * We may already have an acpi_device from a previous enumeration. If | |
1521 | * so, we needn't add it again, but we may still have to start it. | |
1522 | */ | |
1523 | device = NULL; | |
1524 | acpi_bus_get_device(handle, &device); | |
91e56878 | 1525 | if (ops->acpi_op_add && !device) { |
e3b87f8a | 1526 | acpi_add_single_object(&device, handle, type, sta, ops); |
91e56878 MW |
1527 | /* Is the device a known good platform device? */ |
1528 | if (device | |
1529 | && !acpi_match_device_ids(device, acpi_platform_device_ids)) | |
1530 | acpi_create_platform_device(device); | |
1531 | } | |
1da177e4 | 1532 | |
e3b87f8a | 1533 | if (!device) |
51a85faf | 1534 | return AE_CTRL_DEPTH; |
1da177e4 | 1535 | |
51a85faf BH |
1536 | if (ops->acpi_op_start && !(ops->acpi_op_add)) { |
1537 | status = acpi_start_single_object(device); | |
1da177e4 | 1538 | if (ACPI_FAILURE(status)) |
51a85faf BH |
1539 | return AE_CTRL_DEPTH; |
1540 | } | |
1da177e4 | 1541 | |
51a85faf BH |
1542 | if (!*return_value) |
1543 | *return_value = device; | |
1544 | return AE_OK; | |
1545 | } | |
3fb02738 | 1546 | |
51a85faf BH |
1547 | static int acpi_bus_scan(acpi_handle handle, struct acpi_bus_ops *ops, |
1548 | struct acpi_device **child) | |
1549 | { | |
1550 | acpi_status status; | |
51a85faf | 1551 | void *device = NULL; |
3fb02738 | 1552 | |
51a85faf BH |
1553 | status = acpi_bus_check_add(handle, 0, ops, &device); |
1554 | if (ACPI_SUCCESS(status)) | |
1555 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
2263576c | 1556 | acpi_bus_check_add, NULL, ops, &device); |
1da177e4 | 1557 | |
51a85faf BH |
1558 | if (child) |
1559 | *child = device; | |
7779688f TR |
1560 | |
1561 | if (device) | |
1562 | return 0; | |
1563 | else | |
1564 | return -ENODEV; | |
1da177e4 | 1565 | } |
1da177e4 | 1566 | |
7779688f TR |
1567 | /* |
1568 | * acpi_bus_add and acpi_bus_start | |
1569 | * | |
1570 | * scan a given ACPI tree and (probably recently hot-plugged) | |
1571 | * create and add or starts found devices. | |
1572 | * | |
1573 | * If no devices were found -ENODEV is returned which does not | |
1574 | * mean that this is a real error, there just have been no suitable | |
1575 | * ACPI objects in the table trunk from which the kernel could create | |
1576 | * a device and add/start an appropriate driver. | |
1577 | */ | |
1578 | ||
3fb02738 | 1579 | int |
4be44fcd LB |
1580 | acpi_bus_add(struct acpi_device **child, |
1581 | struct acpi_device *parent, acpi_handle handle, int type) | |
3fb02738 | 1582 | { |
3fb02738 RS |
1583 | struct acpi_bus_ops ops; |
1584 | ||
c4168bff LS |
1585 | memset(&ops, 0, sizeof(ops)); |
1586 | ops.acpi_op_add = 1; | |
3fb02738 | 1587 | |
7779688f | 1588 | return acpi_bus_scan(handle, &ops, child); |
3fb02738 RS |
1589 | } |
1590 | EXPORT_SYMBOL(acpi_bus_add); | |
1591 | ||
4be44fcd | 1592 | int acpi_bus_start(struct acpi_device *device) |
3fb02738 | 1593 | { |
3fb02738 | 1594 | struct acpi_bus_ops ops; |
a2100801 | 1595 | int result; |
3fb02738 | 1596 | |
d2f6650a TR |
1597 | if (!device) |
1598 | return -EINVAL; | |
1599 | ||
8e029bf0 BH |
1600 | memset(&ops, 0, sizeof(ops)); |
1601 | ops.acpi_op_start = 1; | |
3fb02738 | 1602 | |
a2100801 RW |
1603 | result = acpi_bus_scan(device->handle, &ops, NULL); |
1604 | ||
3a37898d | 1605 | acpi_update_all_gpes(); |
a2100801 RW |
1606 | |
1607 | return result; | |
3fb02738 RS |
1608 | } |
1609 | EXPORT_SYMBOL(acpi_bus_start); | |
1da177e4 | 1610 | |
ceaba663 | 1611 | int acpi_bus_trim(struct acpi_device *start, int rmdevice) |
1da177e4 | 1612 | { |
4be44fcd LB |
1613 | acpi_status status; |
1614 | struct acpi_device *parent, *child; | |
1615 | acpi_handle phandle, chandle; | |
1616 | acpi_object_type type; | |
1617 | u32 level = 1; | |
1618 | int err = 0; | |
1619 | ||
1620 | parent = start; | |
1da177e4 LT |
1621 | phandle = start->handle; |
1622 | child = chandle = NULL; | |
1623 | ||
1624 | while ((level > 0) && parent && (!err)) { | |
1625 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, | |
4be44fcd | 1626 | chandle, &chandle); |
1da177e4 LT |
1627 | |
1628 | /* | |
1629 | * If this scope is exhausted then move our way back up. | |
1630 | */ | |
1631 | if (ACPI_FAILURE(status)) { | |
1632 | level--; | |
1633 | chandle = phandle; | |
1634 | acpi_get_parent(phandle, &phandle); | |
1635 | child = parent; | |
1636 | parent = parent->parent; | |
1637 | ||
1638 | if (level == 0) | |
1639 | err = acpi_bus_remove(child, rmdevice); | |
1640 | else | |
1641 | err = acpi_bus_remove(child, 1); | |
1642 | ||
1643 | continue; | |
1644 | } | |
1645 | ||
1646 | status = acpi_get_type(chandle, &type); | |
1647 | if (ACPI_FAILURE(status)) { | |
1648 | continue; | |
1649 | } | |
1650 | /* | |
1651 | * If there is a device corresponding to chandle then | |
1652 | * parse it (depth-first). | |
1653 | */ | |
1654 | if (acpi_bus_get_device(chandle, &child) == 0) { | |
1655 | level++; | |
1656 | phandle = chandle; | |
1657 | chandle = NULL; | |
1658 | parent = child; | |
1659 | } | |
1660 | continue; | |
1661 | } | |
1662 | return err; | |
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 | struct acpi_bus_ops ops; |
1da177e4 | 1671 | |
c4168bff LS |
1672 | memset(&ops, 0, sizeof(ops)); |
1673 | ops.acpi_op_add = 1; | |
1674 | ops.acpi_op_start = 1; | |
1675 | ||
1da177e4 LT |
1676 | /* |
1677 | * Enumerate all fixed-feature devices. | |
1678 | */ | |
cee324b1 | 1679 | if ((acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON) == 0) { |
5c478f49 | 1680 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1681 | ACPI_BUS_TYPE_POWER_BUTTON, |
778cbc1d | 1682 | ACPI_STA_DEFAULT, |
c4168bff | 1683 | &ops); |
c10d7a13 | 1684 | device_init_wakeup(&device->dev, true); |
3fb02738 | 1685 | } |
1da177e4 | 1686 | |
cee324b1 | 1687 | if ((acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON) == 0) { |
5c478f49 | 1688 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1689 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
778cbc1d | 1690 | ACPI_STA_DEFAULT, |
c4168bff | 1691 | &ops); |
3fb02738 | 1692 | } |
1da177e4 | 1693 | |
d550d98d | 1694 | return result; |
1da177e4 LT |
1695 | } |
1696 | ||
e747f274 | 1697 | int __init acpi_scan_init(void) |
1da177e4 LT |
1698 | { |
1699 | int result; | |
3fb02738 | 1700 | struct acpi_bus_ops ops; |
1da177e4 | 1701 | |
c4168bff LS |
1702 | memset(&ops, 0, sizeof(ops)); |
1703 | ops.acpi_op_add = 1; | |
1704 | ops.acpi_op_start = 1; | |
1da177e4 | 1705 | |
5b327265 PM |
1706 | result = bus_register(&acpi_bus_type); |
1707 | if (result) { | |
1708 | /* We don't want to quit even if we failed to add suspend/resume */ | |
1709 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
1710 | } | |
1711 | ||
97d9a9e9 RW |
1712 | acpi_power_init(); |
1713 | ||
1da177e4 LT |
1714 | /* |
1715 | * Enumerate devices in the ACPI namespace. | |
1716 | */ | |
51a85faf | 1717 | result = acpi_bus_scan(ACPI_ROOT_OBJECT, &ops, &acpi_root); |
c04209a7 | 1718 | |
c4168bff | 1719 | if (!result) |
adc08e20 | 1720 | result = acpi_bus_scan_fixed(); |
1da177e4 LT |
1721 | |
1722 | if (result) | |
1723 | acpi_device_unregister(acpi_root, ACPI_BUS_REMOVAL_NORMAL); | |
a2100801 | 1724 | else |
3a37898d | 1725 | acpi_update_all_gpes(); |
1da177e4 | 1726 | |
d550d98d | 1727 | return result; |
1da177e4 | 1728 | } |