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 | |
1da177e4 | 32 | static LIST_HEAD(acpi_device_list); |
e49bd2dd | 33 | static LIST_HEAD(acpi_bus_id_list); |
9090589d | 34 | DEFINE_MUTEX(acpi_device_lock); |
1da177e4 LT |
35 | LIST_HEAD(acpi_wakeup_device_list); |
36 | ||
e49bd2dd | 37 | struct acpi_device_bus_id{ |
bb095854 | 38 | char bus_id[15]; |
e49bd2dd ZR |
39 | unsigned int instance_no; |
40 | struct list_head node; | |
1da177e4 | 41 | }; |
29b71a1c TR |
42 | |
43 | /* | |
44 | * Creates hid/cid(s) string needed for modalias and uevent | |
45 | * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: | |
46 | * char *modalias: "acpi:IBM0001:ACPI0001" | |
47 | */ | |
b3e572d2 AB |
48 | static int create_modalias(struct acpi_device *acpi_dev, char *modalias, |
49 | int size) | |
50 | { | |
29b71a1c | 51 | int len; |
5c9fcb5d | 52 | int count; |
7f47fa6c | 53 | struct acpi_hardware_id *id; |
29b71a1c | 54 | |
2b2ae7c7 TR |
55 | if (list_empty(&acpi_dev->pnp.ids)) |
56 | return 0; | |
57 | ||
5c9fcb5d | 58 | len = snprintf(modalias, size, "acpi:"); |
29b71a1c TR |
59 | size -= len; |
60 | ||
7f47fa6c BH |
61 | list_for_each_entry(id, &acpi_dev->pnp.ids, list) { |
62 | count = snprintf(&modalias[len], size, "%s:", id->id); | |
5c9fcb5d ZR |
63 | if (count < 0 || count >= size) |
64 | return -EINVAL; | |
65 | len += count; | |
66 | size -= count; | |
67 | } | |
68 | ||
29b71a1c TR |
69 | modalias[len] = '\0'; |
70 | return len; | |
71 | } | |
72 | ||
73 | static ssize_t | |
74 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
75 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
76 | int len; | |
77 | ||
78 | /* Device has no HID and no CID or string is >1024 */ | |
79 | len = create_modalias(acpi_dev, buf, 1024); | |
80 | if (len <= 0) | |
81 | return 0; | |
82 | buf[len++] = '\n'; | |
83 | return len; | |
84 | } | |
85 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); | |
86 | ||
c4753e57 TK |
87 | /** |
88 | * acpi_bus_hot_remove_device: hot-remove a device and its children | |
89 | * @context: struct acpi_eject_event pointer (freed in this func) | |
90 | * | |
91 | * Hot-remove a device and its children. This function frees up the | |
92 | * memory space passed by arg context, so that the caller may call | |
93 | * this function asynchronously through acpi_os_hotplug_execute(). | |
94 | */ | |
95 | void acpi_bus_hot_remove_device(void *context) | |
1da177e4 | 96 | { |
c4753e57 | 97 | struct acpi_eject_event *ej_event = (struct acpi_eject_event *) context; |
26d46867 | 98 | struct acpi_device *device; |
c4753e57 | 99 | acpi_handle handle = ej_event->handle; |
1da177e4 LT |
100 | struct acpi_object_list arg_list; |
101 | union acpi_object arg; | |
102 | acpi_status status = AE_OK; | |
c4753e57 | 103 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; /* default */ |
1da177e4 | 104 | |
26d46867 | 105 | if (acpi_bus_get_device(handle, &device)) |
c4753e57 | 106 | goto err_out; |
26d46867 ZR |
107 | |
108 | if (!device) | |
c4753e57 | 109 | goto err_out; |
26d46867 ZR |
110 | |
111 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
0794469d | 112 | "Hot-removing device %s...\n", dev_name(&device->dev))); |
26d46867 ZR |
113 | |
114 | if (acpi_bus_trim(device, 1)) { | |
55ac9a01 LM |
115 | printk(KERN_ERR PREFIX |
116 | "Removing device failed\n"); | |
c4753e57 | 117 | goto err_out; |
26d46867 | 118 | } |
1da177e4 | 119 | |
26d46867 ZR |
120 | /* power off device */ |
121 | status = acpi_evaluate_object(handle, "_PS3", NULL, NULL); | |
122 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) | |
55ac9a01 LM |
123 | printk(KERN_WARNING PREFIX |
124 | "Power-off device failed\n"); | |
26d46867 ZR |
125 | |
126 | if (device->flags.lockable) { | |
1da177e4 LT |
127 | arg_list.count = 1; |
128 | arg_list.pointer = &arg; | |
129 | arg.type = ACPI_TYPE_INTEGER; | |
130 | arg.integer.value = 0; | |
131 | acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); | |
132 | } | |
1da177e4 | 133 | |
1da177e4 LT |
134 | arg_list.count = 1; |
135 | arg_list.pointer = &arg; | |
136 | arg.type = ACPI_TYPE_INTEGER; | |
137 | arg.integer.value = 1; | |
1da177e4 | 138 | |
1da177e4 LT |
139 | /* |
140 | * TBD: _EJD support. | |
141 | */ | |
1da177e4 | 142 | status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); |
c4753e57 TK |
143 | if (ACPI_FAILURE(status)) { |
144 | if (status != AE_NOT_FOUND) | |
145 | printk(KERN_WARNING PREFIX | |
146 | "Eject device failed\n"); | |
147 | goto err_out; | |
148 | } | |
1da177e4 | 149 | |
c4753e57 TK |
150 | kfree(context); |
151 | return; | |
1da177e4 | 152 | |
c4753e57 TK |
153 | err_out: |
154 | /* Inform firmware the hot-remove operation has completed w/ error */ | |
155 | (void) acpi_evaluate_hotplug_ost(handle, | |
156 | ej_event->event, ost_code, NULL); | |
157 | kfree(context); | |
c8d72a5e | 158 | return; |
1da177e4 LT |
159 | } |
160 | ||
1da177e4 | 161 | static ssize_t |
f883d9db PM |
162 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
163 | const char *buf, size_t count) | |
1da177e4 | 164 | { |
4be44fcd | 165 | int ret = count; |
4be44fcd | 166 | acpi_status status; |
4be44fcd | 167 | acpi_object_type type = 0; |
f883d9db | 168 | struct acpi_device *acpi_device = to_acpi_device(d); |
c4753e57 | 169 | struct acpi_eject_event *ej_event; |
1da177e4 | 170 | |
1da177e4 LT |
171 | if ((!count) || (buf[0] != '1')) { |
172 | return -EINVAL; | |
173 | } | |
1da177e4 | 174 | #ifndef FORCE_EJECT |
f883d9db | 175 | if (acpi_device->driver == NULL) { |
1da177e4 LT |
176 | ret = -ENODEV; |
177 | goto err; | |
178 | } | |
179 | #endif | |
f883d9db PM |
180 | status = acpi_get_type(acpi_device->handle, &type); |
181 | if (ACPI_FAILURE(status) || (!acpi_device->flags.ejectable)) { | |
1da177e4 LT |
182 | ret = -ENODEV; |
183 | goto err; | |
184 | } | |
1da177e4 | 185 | |
c4753e57 TK |
186 | ej_event = kmalloc(sizeof(*ej_event), GFP_KERNEL); |
187 | if (!ej_event) { | |
188 | ret = -ENOMEM; | |
189 | goto err; | |
190 | } | |
191 | ||
192 | ej_event->handle = acpi_device->handle; | |
193 | if (acpi_device->flags.eject_pending) { | |
194 | /* event originated from ACPI eject notification */ | |
195 | ej_event->event = ACPI_NOTIFY_EJECT_REQUEST; | |
196 | acpi_device->flags.eject_pending = 0; | |
197 | } else { | |
198 | /* event originated from user */ | |
199 | ej_event->event = ACPI_OST_EC_OSPM_EJECT; | |
200 | (void) acpi_evaluate_hotplug_ost(ej_event->handle, | |
201 | ej_event->event, ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); | |
202 | } | |
203 | ||
204 | acpi_os_hotplug_execute(acpi_bus_hot_remove_device, (void *)ej_event); | |
74523c90 | 205 | err: |
1da177e4 | 206 | return ret; |
1da177e4 LT |
207 | } |
208 | ||
f883d9db | 209 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
1da177e4 | 210 | |
e49bd2dd ZR |
211 | static ssize_t |
212 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
213 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1da177e4 | 214 | |
ea8d82fd | 215 | return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev)); |
1da177e4 | 216 | } |
e49bd2dd | 217 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
1da177e4 | 218 | |
e49bd2dd ZR |
219 | static ssize_t |
220 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
221 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
222 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
223 | int result; | |
1da177e4 | 224 | |
e49bd2dd | 225 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
0c526d96 | 226 | if (result) |
e49bd2dd | 227 | goto end; |
1da177e4 | 228 | |
e49bd2dd ZR |
229 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
230 | kfree(path.pointer); | |
0c526d96 | 231 | end: |
e49bd2dd | 232 | return result; |
1da177e4 | 233 | } |
e49bd2dd | 234 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
1da177e4 | 235 | |
d1efe3c3 LO |
236 | /* sysfs file that shows description text from the ACPI _STR method */ |
237 | static ssize_t description_show(struct device *dev, | |
238 | struct device_attribute *attr, | |
239 | char *buf) { | |
240 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
241 | int result; | |
242 | ||
243 | if (acpi_dev->pnp.str_obj == NULL) | |
244 | return 0; | |
245 | ||
246 | /* | |
247 | * The _STR object contains a Unicode identifier for a device. | |
248 | * We need to convert to utf-8 so it can be displayed. | |
249 | */ | |
250 | result = utf16s_to_utf8s( | |
251 | (wchar_t *)acpi_dev->pnp.str_obj->buffer.pointer, | |
252 | acpi_dev->pnp.str_obj->buffer.length, | |
253 | UTF16_LITTLE_ENDIAN, buf, | |
254 | PAGE_SIZE); | |
255 | ||
256 | buf[result++] = '\n'; | |
257 | ||
258 | return result; | |
259 | } | |
260 | static DEVICE_ATTR(description, 0444, description_show, NULL); | |
261 | ||
e49bd2dd | 262 | static int acpi_device_setup_files(struct acpi_device *dev) |
1da177e4 | 263 | { |
d1efe3c3 | 264 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
f883d9db PM |
265 | acpi_status status; |
266 | acpi_handle temp; | |
e49bd2dd | 267 | int result = 0; |
1da177e4 LT |
268 | |
269 | /* | |
e49bd2dd | 270 | * Devices gotten from FADT don't have a "path" attribute |
1da177e4 | 271 | */ |
0c526d96 | 272 | if (dev->handle) { |
e49bd2dd | 273 | result = device_create_file(&dev->dev, &dev_attr_path); |
0c526d96 | 274 | if (result) |
e49bd2dd | 275 | goto end; |
1da177e4 LT |
276 | } |
277 | ||
2b2ae7c7 TR |
278 | if (!list_empty(&dev->pnp.ids)) { |
279 | result = device_create_file(&dev->dev, &dev_attr_hid); | |
280 | if (result) | |
281 | goto end; | |
1da177e4 | 282 | |
2b2ae7c7 TR |
283 | result = device_create_file(&dev->dev, &dev_attr_modalias); |
284 | if (result) | |
285 | goto end; | |
286 | } | |
29b71a1c | 287 | |
d1efe3c3 LO |
288 | /* |
289 | * If device has _STR, 'description' file is created | |
290 | */ | |
291 | status = acpi_get_handle(dev->handle, "_STR", &temp); | |
292 | if (ACPI_SUCCESS(status)) { | |
293 | status = acpi_evaluate_object(dev->handle, "_STR", | |
294 | NULL, &buffer); | |
295 | if (ACPI_FAILURE(status)) | |
296 | buffer.pointer = NULL; | |
297 | dev->pnp.str_obj = buffer.pointer; | |
298 | result = device_create_file(&dev->dev, &dev_attr_description); | |
299 | if (result) | |
300 | goto end; | |
301 | } | |
302 | ||
e49bd2dd ZR |
303 | /* |
304 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
305 | * hot-removal function from userland. | |
306 | */ | |
f883d9db PM |
307 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); |
308 | if (ACPI_SUCCESS(status)) | |
e49bd2dd | 309 | result = device_create_file(&dev->dev, &dev_attr_eject); |
0c526d96 | 310 | end: |
e49bd2dd | 311 | return result; |
1da177e4 LT |
312 | } |
313 | ||
f883d9db | 314 | static void acpi_device_remove_files(struct acpi_device *dev) |
1da177e4 | 315 | { |
f883d9db PM |
316 | acpi_status status; |
317 | acpi_handle temp; | |
1da177e4 | 318 | |
f883d9db | 319 | /* |
d1efe3c3 LO |
320 | * If device has _STR, remove 'description' file |
321 | */ | |
322 | status = acpi_get_handle(dev->handle, "_STR", &temp); | |
323 | if (ACPI_SUCCESS(status)) { | |
324 | kfree(dev->pnp.str_obj); | |
325 | device_remove_file(&dev->dev, &dev_attr_description); | |
326 | } | |
327 | /* | |
328 | * If device has _EJ0, remove 'eject' file. | |
f883d9db PM |
329 | */ |
330 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); | |
331 | if (ACPI_SUCCESS(status)) | |
332 | device_remove_file(&dev->dev, &dev_attr_eject); | |
1da177e4 | 333 | |
1131b938 BH |
334 | device_remove_file(&dev->dev, &dev_attr_modalias); |
335 | device_remove_file(&dev->dev, &dev_attr_hid); | |
0c526d96 | 336 | if (dev->handle) |
e49bd2dd | 337 | device_remove_file(&dev->dev, &dev_attr_path); |
1da177e4 | 338 | } |
1da177e4 | 339 | /* -------------------------------------------------------------------------- |
9e89dde2 | 340 | ACPI Bus operations |
1da177e4 | 341 | -------------------------------------------------------------------------- */ |
29b71a1c | 342 | |
cf761af9 MW |
343 | static const struct acpi_device_id *__acpi_match_device( |
344 | struct acpi_device *device, const struct acpi_device_id *ids) | |
29b71a1c TR |
345 | { |
346 | const struct acpi_device_id *id; | |
7f47fa6c | 347 | struct acpi_hardware_id *hwid; |
29b71a1c | 348 | |
39a0ad87 ZY |
349 | /* |
350 | * If the device is not present, it is unnecessary to load device | |
351 | * driver for it. | |
352 | */ | |
353 | if (!device->status.present) | |
cf761af9 | 354 | return NULL; |
39a0ad87 | 355 | |
7f47fa6c BH |
356 | for (id = ids; id->id[0]; id++) |
357 | list_for_each_entry(hwid, &device->pnp.ids, list) | |
358 | if (!strcmp((char *) id->id, hwid->id)) | |
cf761af9 MW |
359 | return id; |
360 | ||
361 | return NULL; | |
362 | } | |
363 | ||
364 | /** | |
365 | * acpi_match_device - Match a struct device against a given list of ACPI IDs | |
366 | * @ids: Array of struct acpi_device_id object to match against. | |
367 | * @dev: The device structure to match. | |
368 | * | |
369 | * Check if @dev has a valid ACPI handle and if there is a struct acpi_device | |
370 | * object for that handle and use that object to match against a given list of | |
371 | * device IDs. | |
372 | * | |
373 | * Return a pointer to the first matching ID on success or %NULL on failure. | |
374 | */ | |
375 | const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids, | |
376 | const struct device *dev) | |
377 | { | |
378 | struct acpi_device *adev; | |
379 | ||
380 | if (!ids || !dev->acpi_handle | |
381 | || ACPI_FAILURE(acpi_bus_get_device(dev->acpi_handle, &adev))) | |
382 | return NULL; | |
383 | ||
384 | return __acpi_match_device(adev, ids); | |
385 | } | |
386 | EXPORT_SYMBOL_GPL(acpi_match_device); | |
29b71a1c | 387 | |
cf761af9 MW |
388 | int acpi_match_device_ids(struct acpi_device *device, |
389 | const struct acpi_device_id *ids) | |
390 | { | |
391 | return __acpi_match_device(device, ids) ? 0 : -ENOENT; | |
29b71a1c TR |
392 | } |
393 | EXPORT_SYMBOL(acpi_match_device_ids); | |
394 | ||
7f47fa6c BH |
395 | static void acpi_free_ids(struct acpi_device *device) |
396 | { | |
397 | struct acpi_hardware_id *id, *tmp; | |
398 | ||
399 | list_for_each_entry_safe(id, tmp, &device->pnp.ids, list) { | |
400 | kfree(id->id); | |
401 | kfree(id); | |
402 | } | |
403 | } | |
404 | ||
1890a97a | 405 | static void acpi_device_release(struct device *dev) |
1da177e4 | 406 | { |
1890a97a | 407 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 408 | |
7f47fa6c | 409 | acpi_free_ids(acpi_dev); |
1890a97a | 410 | kfree(acpi_dev); |
1da177e4 LT |
411 | } |
412 | ||
5d9464a4 | 413 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 414 | { |
5d9464a4 PM |
415 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
416 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
1da177e4 | 417 | |
29b71a1c | 418 | return !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
5d9464a4 | 419 | } |
1da177e4 | 420 | |
7eff2e7a | 421 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 | 422 | { |
5d9464a4 | 423 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
7eff2e7a | 424 | int len; |
5d9464a4 | 425 | |
2b2ae7c7 TR |
426 | if (list_empty(&acpi_dev->pnp.ids)) |
427 | return 0; | |
428 | ||
7eff2e7a KS |
429 | if (add_uevent_var(env, "MODALIAS=")) |
430 | return -ENOMEM; | |
431 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], | |
432 | sizeof(env->buf) - env->buflen); | |
433 | if (len >= (sizeof(env->buf) - env->buflen)) | |
434 | return -ENOMEM; | |
435 | env->buflen += len; | |
9e89dde2 | 436 | return 0; |
1da177e4 LT |
437 | } |
438 | ||
46ec8598 BH |
439 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
440 | { | |
441 | struct acpi_device *device = data; | |
442 | ||
443 | device->driver->ops.notify(device, event); | |
444 | } | |
445 | ||
446 | static acpi_status acpi_device_notify_fixed(void *data) | |
447 | { | |
448 | struct acpi_device *device = data; | |
449 | ||
53de5356 BH |
450 | /* Fixed hardware devices have no handles */ |
451 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); | |
46ec8598 BH |
452 | return AE_OK; |
453 | } | |
454 | ||
455 | static int acpi_device_install_notify_handler(struct acpi_device *device) | |
456 | { | |
457 | acpi_status status; | |
46ec8598 | 458 | |
ccba2a36 | 459 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
460 | status = |
461 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
462 | acpi_device_notify_fixed, | |
463 | device); | |
ccba2a36 | 464 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
465 | status = |
466 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
467 | acpi_device_notify_fixed, | |
468 | device); | |
469 | else | |
470 | status = acpi_install_notify_handler(device->handle, | |
471 | ACPI_DEVICE_NOTIFY, | |
472 | acpi_device_notify, | |
473 | device); | |
474 | ||
475 | if (ACPI_FAILURE(status)) | |
476 | return -EINVAL; | |
477 | return 0; | |
478 | } | |
479 | ||
480 | static void acpi_device_remove_notify_handler(struct acpi_device *device) | |
481 | { | |
ccba2a36 | 482 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
483 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, |
484 | acpi_device_notify_fixed); | |
ccba2a36 | 485 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
486 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, |
487 | acpi_device_notify_fixed); | |
488 | else | |
489 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, | |
490 | acpi_device_notify); | |
491 | } | |
492 | ||
5d9464a4 PM |
493 | static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *); |
494 | static int acpi_start_single_object(struct acpi_device *); | |
495 | static int acpi_device_probe(struct device * dev) | |
1da177e4 | 496 | { |
5d9464a4 PM |
497 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
498 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
499 | int ret; | |
500 | ||
501 | ret = acpi_bus_driver_init(acpi_dev, acpi_drv); | |
502 | if (!ret) { | |
c4168bff LS |
503 | if (acpi_dev->bus_ops.acpi_op_start) |
504 | acpi_start_single_object(acpi_dev); | |
46ec8598 BH |
505 | |
506 | if (acpi_drv->ops.notify) { | |
507 | ret = acpi_device_install_notify_handler(acpi_dev); | |
508 | if (ret) { | |
46ec8598 BH |
509 | if (acpi_drv->ops.remove) |
510 | acpi_drv->ops.remove(acpi_dev, | |
511 | acpi_dev->removal_type); | |
512 | return ret; | |
513 | } | |
514 | } | |
515 | ||
5d9464a4 PM |
516 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
517 | "Found driver [%s] for device [%s]\n", | |
518 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
519 | get_device(dev); | |
520 | } | |
521 | return ret; | |
522 | } | |
1da177e4 | 523 | |
5d9464a4 PM |
524 | static int acpi_device_remove(struct device * dev) |
525 | { | |
526 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
527 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
528 | ||
529 | if (acpi_drv) { | |
46ec8598 BH |
530 | if (acpi_drv->ops.notify) |
531 | acpi_device_remove_notify_handler(acpi_dev); | |
5d9464a4 | 532 | if (acpi_drv->ops.remove) |
96333578 | 533 | acpi_drv->ops.remove(acpi_dev, acpi_dev->removal_type); |
1da177e4 | 534 | } |
5d9464a4 | 535 | acpi_dev->driver = NULL; |
db89b4f0 | 536 | acpi_dev->driver_data = NULL; |
1da177e4 | 537 | |
5d9464a4 | 538 | put_device(dev); |
9e89dde2 ZR |
539 | return 0; |
540 | } | |
1da177e4 | 541 | |
55955aad | 542 | struct bus_type acpi_bus_type = { |
9e89dde2 | 543 | .name = "acpi", |
5d9464a4 PM |
544 | .match = acpi_bus_match, |
545 | .probe = acpi_device_probe, | |
546 | .remove = acpi_device_remove, | |
547 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
548 | }; |
549 | ||
66b7ed40 | 550 | static int acpi_device_register(struct acpi_device *device) |
1da177e4 | 551 | { |
4be44fcd | 552 | int result; |
e49bd2dd ZR |
553 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
554 | int found = 0; | |
66b7ed40 | 555 | |
9e89dde2 ZR |
556 | /* |
557 | * Linkage | |
558 | * ------- | |
559 | * Link this device to its parent and siblings. | |
560 | */ | |
561 | INIT_LIST_HEAD(&device->children); | |
562 | INIT_LIST_HEAD(&device->node); | |
9e89dde2 | 563 | INIT_LIST_HEAD(&device->wakeup_list); |
1033f904 LT |
564 | INIT_LIST_HEAD(&device->physical_node_list); |
565 | mutex_init(&device->physical_node_lock); | |
1da177e4 | 566 | |
e49bd2dd ZR |
567 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
568 | if (!new_bus_id) { | |
569 | printk(KERN_ERR PREFIX "Memory allocation error\n"); | |
570 | return -ENOMEM; | |
1da177e4 | 571 | } |
e49bd2dd | 572 | |
9090589d | 573 | mutex_lock(&acpi_device_lock); |
e49bd2dd ZR |
574 | /* |
575 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
576 | * If failed, create one and link it into acpi_bus_id_list | |
577 | */ | |
578 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
1131b938 BH |
579 | if (!strcmp(acpi_device_bus_id->bus_id, |
580 | acpi_device_hid(device))) { | |
581 | acpi_device_bus_id->instance_no++; | |
e49bd2dd ZR |
582 | found = 1; |
583 | kfree(new_bus_id); | |
584 | break; | |
585 | } | |
1da177e4 | 586 | } |
0c526d96 | 587 | if (!found) { |
e49bd2dd | 588 | acpi_device_bus_id = new_bus_id; |
1131b938 | 589 | strcpy(acpi_device_bus_id->bus_id, acpi_device_hid(device)); |
e49bd2dd ZR |
590 | acpi_device_bus_id->instance_no = 0; |
591 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 592 | } |
0794469d | 593 | dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 594 | |
33b57150 | 595 | if (device->parent) |
9e89dde2 | 596 | list_add_tail(&device->node, &device->parent->children); |
33b57150 | 597 | |
9e89dde2 ZR |
598 | if (device->wakeup.flags.valid) |
599 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
9090589d | 600 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 601 | |
1890a97a | 602 | if (device->parent) |
66b7ed40 | 603 | device->dev.parent = &device->parent->dev; |
1890a97a | 604 | device->dev.bus = &acpi_bus_type; |
1890a97a | 605 | device->dev.release = &acpi_device_release; |
8b12b922 | 606 | result = device_register(&device->dev); |
0c526d96 | 607 | if (result) { |
8b12b922 | 608 | dev_err(&device->dev, "Error registering device\n"); |
e49bd2dd | 609 | goto end; |
1da177e4 | 610 | } |
1da177e4 | 611 | |
e49bd2dd | 612 | result = acpi_device_setup_files(device); |
0c526d96 | 613 | if (result) |
0794469d KS |
614 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
615 | dev_name(&device->dev)); | |
1da177e4 | 616 | |
96333578 | 617 | device->removal_type = ACPI_BUS_REMOVAL_NORMAL; |
1da177e4 | 618 | return 0; |
0c526d96 | 619 | end: |
9090589d | 620 | mutex_lock(&acpi_device_lock); |
33b57150 | 621 | if (device->parent) |
e49bd2dd | 622 | list_del(&device->node); |
e49bd2dd | 623 | list_del(&device->wakeup_list); |
9090589d | 624 | mutex_unlock(&acpi_device_lock); |
e49bd2dd | 625 | return result; |
1da177e4 LT |
626 | } |
627 | ||
9e89dde2 ZR |
628 | static void acpi_device_unregister(struct acpi_device *device, int type) |
629 | { | |
9090589d | 630 | mutex_lock(&acpi_device_lock); |
33b57150 | 631 | if (device->parent) |
9e89dde2 | 632 | list_del(&device->node); |
1da177e4 | 633 | |
9e89dde2 | 634 | list_del(&device->wakeup_list); |
9090589d | 635 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 636 | |
9e89dde2 | 637 | acpi_detach_data(device->handle, acpi_bus_data_handler); |
1890a97a | 638 | |
f883d9db | 639 | acpi_device_remove_files(device); |
1890a97a | 640 | device_unregister(&device->dev); |
1da177e4 LT |
641 | } |
642 | ||
9e89dde2 ZR |
643 | /* -------------------------------------------------------------------------- |
644 | Driver Management | |
645 | -------------------------------------------------------------------------- */ | |
1da177e4 | 646 | /** |
d758a8fa RD |
647 | * acpi_bus_driver_init - add a device to a driver |
648 | * @device: the device to add and initialize | |
649 | * @driver: driver for the device | |
650 | * | |
0c526d96 | 651 | * Used to initialize a device via its device driver. Called whenever a |
1890a97a | 652 | * driver is bound to a device. Invokes the driver's add() ops. |
1da177e4 LT |
653 | */ |
654 | static int | |
4be44fcd | 655 | acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) |
1da177e4 | 656 | { |
4be44fcd | 657 | int result = 0; |
1da177e4 | 658 | |
1da177e4 | 659 | if (!device || !driver) |
d550d98d | 660 | return -EINVAL; |
1da177e4 LT |
661 | |
662 | if (!driver->ops.add) | |
d550d98d | 663 | return -ENOSYS; |
1da177e4 LT |
664 | |
665 | result = driver->ops.add(device); | |
666 | if (result) { | |
667 | device->driver = NULL; | |
db89b4f0 | 668 | device->driver_data = NULL; |
d550d98d | 669 | return result; |
1da177e4 LT |
670 | } |
671 | ||
672 | device->driver = driver; | |
673 | ||
674 | /* | |
675 | * TBD - Configuration Management: Assign resources to device based | |
676 | * upon possible configuration and currently allocated resources. | |
677 | */ | |
678 | ||
4be44fcd LB |
679 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
680 | "Driver successfully bound to device\n")); | |
d550d98d | 681 | return 0; |
3fb02738 RS |
682 | } |
683 | ||
8713cbef | 684 | static int acpi_start_single_object(struct acpi_device *device) |
3fb02738 RS |
685 | { |
686 | int result = 0; | |
687 | struct acpi_driver *driver; | |
688 | ||
3fb02738 RS |
689 | |
690 | if (!(driver = device->driver)) | |
d550d98d | 691 | return 0; |
3fb02738 | 692 | |
1da177e4 LT |
693 | if (driver->ops.start) { |
694 | result = driver->ops.start(device); | |
695 | if (result && driver->ops.remove) | |
696 | driver->ops.remove(device, ACPI_BUS_REMOVAL_NORMAL); | |
1da177e4 LT |
697 | } |
698 | ||
d550d98d | 699 | return result; |
1da177e4 LT |
700 | } |
701 | ||
9e89dde2 ZR |
702 | /** |
703 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
704 | * @driver: driver being registered | |
705 | * | |
706 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
707 | * devices that match the driver's criteria and binds. Returns zero for | |
708 | * success or a negative error status for failure. | |
709 | */ | |
710 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
1da177e4 | 711 | { |
1890a97a | 712 | int ret; |
1da177e4 | 713 | |
9e89dde2 ZR |
714 | if (acpi_disabled) |
715 | return -ENODEV; | |
1890a97a PM |
716 | driver->drv.name = driver->name; |
717 | driver->drv.bus = &acpi_bus_type; | |
718 | driver->drv.owner = driver->owner; | |
1da177e4 | 719 | |
1890a97a PM |
720 | ret = driver_register(&driver->drv); |
721 | return ret; | |
9e89dde2 | 722 | } |
1da177e4 | 723 | |
9e89dde2 ZR |
724 | EXPORT_SYMBOL(acpi_bus_register_driver); |
725 | ||
726 | /** | |
727 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus | |
728 | * @driver: driver to unregister | |
729 | * | |
730 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
731 | * devices that match the driver's criteria and unbinds. | |
732 | */ | |
733 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
734 | { | |
1890a97a | 735 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
736 | } |
737 | ||
738 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
739 | ||
9e89dde2 ZR |
740 | /* -------------------------------------------------------------------------- |
741 | Device Enumeration | |
742 | -------------------------------------------------------------------------- */ | |
5c478f49 BH |
743 | static struct acpi_device *acpi_bus_get_parent(acpi_handle handle) |
744 | { | |
745 | acpi_status status; | |
746 | int ret; | |
747 | struct acpi_device *device; | |
748 | ||
749 | /* | |
750 | * Fixed hardware devices do not appear in the namespace and do not | |
751 | * have handles, but we fabricate acpi_devices for them, so we have | |
752 | * to deal with them specially. | |
753 | */ | |
754 | if (handle == NULL) | |
755 | return acpi_root; | |
756 | ||
757 | do { | |
758 | status = acpi_get_parent(handle, &handle); | |
759 | if (status == AE_NULL_ENTRY) | |
760 | return NULL; | |
761 | if (ACPI_FAILURE(status)) | |
762 | return acpi_root; | |
763 | ||
764 | ret = acpi_bus_get_device(handle, &device); | |
765 | if (ret == 0) | |
766 | return device; | |
767 | } while (1); | |
768 | } | |
769 | ||
9e89dde2 ZR |
770 | acpi_status |
771 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
772 | { | |
773 | acpi_status status; | |
774 | acpi_handle tmp; | |
775 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
776 | union acpi_object *obj; | |
777 | ||
778 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
779 | if (ACPI_FAILURE(status)) | |
780 | return status; | |
781 | ||
782 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
783 | if (ACPI_SUCCESS(status)) { | |
784 | obj = buffer.pointer; | |
3b5fee59 HM |
785 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
786 | ejd); | |
9e89dde2 ZR |
787 | kfree(buffer.pointer); |
788 | } | |
789 | return status; | |
790 | } | |
791 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
792 | ||
8e4319c4 | 793 | void acpi_bus_data_handler(acpi_handle handle, void *context) |
9e89dde2 ZR |
794 | { |
795 | ||
796 | /* TBD */ | |
797 | ||
798 | return; | |
799 | } | |
800 | ||
9e89dde2 ZR |
801 | static int acpi_bus_get_perf_flags(struct acpi_device *device) |
802 | { | |
803 | device->performance.state = ACPI_STATE_UNKNOWN; | |
804 | return 0; | |
805 | } | |
806 | ||
807 | static acpi_status | |
b581a7f9 RW |
808 | acpi_bus_extract_wakeup_device_power_package(acpi_handle handle, |
809 | struct acpi_device_wakeup *wakeup) | |
9e89dde2 | 810 | { |
b581a7f9 RW |
811 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
812 | union acpi_object *package = NULL; | |
9e89dde2 | 813 | union acpi_object *element = NULL; |
b581a7f9 RW |
814 | acpi_status status; |
815 | int i = 0; | |
9e89dde2 | 816 | |
b581a7f9 | 817 | if (!wakeup) |
9e89dde2 ZR |
818 | return AE_BAD_PARAMETER; |
819 | ||
b581a7f9 RW |
820 | /* _PRW */ |
821 | status = acpi_evaluate_object(handle, "_PRW", NULL, &buffer); | |
822 | if (ACPI_FAILURE(status)) { | |
823 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
824 | return status; | |
825 | } | |
826 | ||
827 | package = (union acpi_object *)buffer.pointer; | |
828 | ||
829 | if (!package || (package->package.count < 2)) { | |
830 | status = AE_BAD_DATA; | |
831 | goto out; | |
832 | } | |
833 | ||
9e89dde2 | 834 | element = &(package->package.elements[0]); |
b581a7f9 RW |
835 | if (!element) { |
836 | status = AE_BAD_DATA; | |
837 | goto out; | |
838 | } | |
9e89dde2 ZR |
839 | if (element->type == ACPI_TYPE_PACKAGE) { |
840 | if ((element->package.count < 2) || | |
841 | (element->package.elements[0].type != | |
842 | ACPI_TYPE_LOCAL_REFERENCE) | |
b581a7f9 RW |
843 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) { |
844 | status = AE_BAD_DATA; | |
845 | goto out; | |
846 | } | |
847 | wakeup->gpe_device = | |
9e89dde2 | 848 | element->package.elements[0].reference.handle; |
b581a7f9 | 849 | wakeup->gpe_number = |
9e89dde2 ZR |
850 | (u32) element->package.elements[1].integer.value; |
851 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
b581a7f9 RW |
852 | wakeup->gpe_device = NULL; |
853 | wakeup->gpe_number = element->integer.value; | |
854 | } else { | |
855 | status = AE_BAD_DATA; | |
856 | goto out; | |
857 | } | |
9e89dde2 ZR |
858 | |
859 | element = &(package->package.elements[1]); | |
860 | if (element->type != ACPI_TYPE_INTEGER) { | |
b581a7f9 RW |
861 | status = AE_BAD_DATA; |
862 | goto out; | |
9e89dde2 | 863 | } |
b581a7f9 | 864 | wakeup->sleep_state = element->integer.value; |
9e89dde2 ZR |
865 | |
866 | if ((package->package.count - 2) > ACPI_MAX_HANDLES) { | |
b581a7f9 RW |
867 | status = AE_NO_MEMORY; |
868 | goto out; | |
9e89dde2 | 869 | } |
b581a7f9 RW |
870 | wakeup->resources.count = package->package.count - 2; |
871 | for (i = 0; i < wakeup->resources.count; i++) { | |
9e89dde2 | 872 | element = &(package->package.elements[i + 2]); |
b581a7f9 RW |
873 | if (element->type != ACPI_TYPE_LOCAL_REFERENCE) { |
874 | status = AE_BAD_DATA; | |
875 | goto out; | |
876 | } | |
9e89dde2 | 877 | |
b581a7f9 | 878 | wakeup->resources.handles[i] = element->reference.handle; |
1da177e4 | 879 | } |
9e89dde2 | 880 | |
bba63a29 | 881 | acpi_setup_gpe_for_wake(handle, wakeup->gpe_device, wakeup->gpe_number); |
9874647b | 882 | |
b581a7f9 RW |
883 | out: |
884 | kfree(buffer.pointer); | |
885 | ||
886 | return status; | |
1da177e4 LT |
887 | } |
888 | ||
f517709d | 889 | static void acpi_bus_set_run_wake_flags(struct acpi_device *device) |
1da177e4 | 890 | { |
29b71a1c TR |
891 | struct acpi_device_id button_device_ids[] = { |
892 | {"PNP0C0D", 0}, | |
893 | {"PNP0C0C", 0}, | |
894 | {"PNP0C0E", 0}, | |
895 | {"", 0}, | |
896 | }; | |
f517709d RW |
897 | acpi_status status; |
898 | acpi_event_status event_status; | |
899 | ||
b67ea761 | 900 | device->wakeup.flags.notifier_present = 0; |
f517709d RW |
901 | |
902 | /* Power button, Lid switch always enable wakeup */ | |
903 | if (!acpi_match_device_ids(device, button_device_ids)) { | |
904 | device->wakeup.flags.run_wake = 1; | |
f2b56bc8 | 905 | device_set_wakeup_capable(&device->dev, true); |
f517709d RW |
906 | return; |
907 | } | |
908 | ||
e8e18c95 RW |
909 | status = acpi_get_gpe_status(device->wakeup.gpe_device, |
910 | device->wakeup.gpe_number, | |
911 | &event_status); | |
f517709d RW |
912 | if (status == AE_OK) |
913 | device->wakeup.flags.run_wake = | |
914 | !!(event_status & ACPI_EVENT_FLAG_HANDLE); | |
915 | } | |
916 | ||
d57d09a4 | 917 | static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
f517709d | 918 | { |
d57d09a4 | 919 | acpi_handle temp; |
f517709d | 920 | acpi_status status = 0; |
f517709d | 921 | int psw_error; |
29b71a1c | 922 | |
d57d09a4 RW |
923 | /* Presence of _PRW indicates wake capable */ |
924 | status = acpi_get_handle(device->handle, "_PRW", &temp); | |
925 | if (ACPI_FAILURE(status)) | |
926 | return; | |
927 | ||
b581a7f9 RW |
928 | status = acpi_bus_extract_wakeup_device_power_package(device->handle, |
929 | &device->wakeup); | |
9e89dde2 ZR |
930 | if (ACPI_FAILURE(status)) { |
931 | ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package")); | |
d57d09a4 | 932 | return; |
9e89dde2 | 933 | } |
1da177e4 | 934 | |
9e89dde2 | 935 | device->wakeup.flags.valid = 1; |
9b83ccd2 | 936 | device->wakeup.prepare_count = 0; |
f517709d | 937 | acpi_bus_set_run_wake_flags(device); |
729b2bdb ZY |
938 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
939 | * system for the ACPI device with the _PRW object. | |
940 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. | |
941 | * So it is necessary to call _DSW object first. Only when it is not | |
942 | * present will the _PSW object used. | |
943 | */ | |
77e76609 RW |
944 | psw_error = acpi_device_sleep_wake(device, 0, 0, 0); |
945 | if (psw_error) | |
946 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
947 | "error in _DSW or _PSW evaluation\n")); | |
1da177e4 | 948 | } |
1da177e4 | 949 | |
bf325f95 RW |
950 | static void acpi_bus_add_power_resource(acpi_handle handle); |
951 | ||
9e89dde2 | 952 | static int acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 953 | { |
9e89dde2 ZR |
954 | acpi_status status = 0; |
955 | acpi_handle handle = NULL; | |
956 | u32 i = 0; | |
1a365616 | 957 | |
4be44fcd | 958 | |
9e89dde2 ZR |
959 | /* |
960 | * Power Management Flags | |
961 | */ | |
962 | status = acpi_get_handle(device->handle, "_PSC", &handle); | |
963 | if (ACPI_SUCCESS(status)) | |
964 | device->power.flags.explicit_get = 1; | |
965 | status = acpi_get_handle(device->handle, "_IRC", &handle); | |
966 | if (ACPI_SUCCESS(status)) | |
967 | device->power.flags.inrush_current = 1; | |
1da177e4 | 968 | |
9e89dde2 ZR |
969 | /* |
970 | * Enumerate supported power management states | |
971 | */ | |
1cc0c998 | 972 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) { |
9e89dde2 ZR |
973 | struct acpi_device_power_state *ps = &device->power.states[i]; |
974 | char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' }; | |
1da177e4 | 975 | |
9e89dde2 ZR |
976 | /* Evaluate "_PRx" to se if power resources are referenced */ |
977 | acpi_evaluate_reference(device->handle, object_name, NULL, | |
978 | &ps->resources); | |
979 | if (ps->resources.count) { | |
bf325f95 RW |
980 | int j; |
981 | ||
9e89dde2 | 982 | device->power.flags.power_resources = 1; |
bf325f95 RW |
983 | for (j = 0; j < ps->resources.count; j++) |
984 | acpi_bus_add_power_resource(ps->resources.handles[j]); | |
1da177e4 | 985 | } |
1da177e4 | 986 | |
9e89dde2 ZR |
987 | /* Evaluate "_PSx" to see if we can do explicit sets */ |
988 | object_name[2] = 'S'; | |
989 | status = acpi_get_handle(device->handle, object_name, &handle); | |
37239978 | 990 | if (ACPI_SUCCESS(status)) |
9e89dde2 | 991 | ps->flags.explicit_set = 1; |
1da177e4 | 992 | |
1cc0c998 LM |
993 | /* |
994 | * State is valid if there are means to put the device into it. | |
995 | * D3hot is only valid if _PR3 present. | |
996 | */ | |
997 | if (ps->resources.count || | |
998 | (ps->flags.explicit_set && i < ACPI_STATE_D3_HOT)) | |
9e89dde2 | 999 | ps->flags.valid = 1; |
1da177e4 | 1000 | |
9e89dde2 ZR |
1001 | ps->power = -1; /* Unknown - driver assigned */ |
1002 | ps->latency = -1; /* Unknown - driver assigned */ | |
1003 | } | |
1da177e4 | 1004 | |
9e89dde2 ZR |
1005 | /* Set defaults for D0 and D3 states (always valid) */ |
1006 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
1007 | device->power.states[ACPI_STATE_D0].power = 100; | |
1008 | device->power.states[ACPI_STATE_D3].flags.valid = 1; | |
1009 | device->power.states[ACPI_STATE_D3].power = 0; | |
c8f7a62c | 1010 | |
5c7dd710 RW |
1011 | /* Set D3cold's explicit_set flag if _PS3 exists. */ |
1012 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set) | |
1013 | device->power.states[ACPI_STATE_D3_COLD].flags.explicit_set = 1; | |
1014 | ||
ade3e7fe | 1015 | acpi_bus_init_power(device); |
c8f7a62c | 1016 | |
9e89dde2 ZR |
1017 | return 0; |
1018 | } | |
c8f7a62c | 1019 | |
4be44fcd | 1020 | static int acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 1021 | { |
4be44fcd LB |
1022 | acpi_status status = AE_OK; |
1023 | acpi_handle temp = NULL; | |
1da177e4 | 1024 | |
1da177e4 LT |
1025 | |
1026 | /* Presence of _STA indicates 'dynamic_status' */ | |
1027 | status = acpi_get_handle(device->handle, "_STA", &temp); | |
1028 | if (ACPI_SUCCESS(status)) | |
1029 | device->flags.dynamic_status = 1; | |
1030 | ||
1da177e4 LT |
1031 | /* Presence of _RMV indicates 'removable' */ |
1032 | status = acpi_get_handle(device->handle, "_RMV", &temp); | |
1033 | if (ACPI_SUCCESS(status)) | |
1034 | device->flags.removable = 1; | |
1035 | ||
1036 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
1037 | status = acpi_get_handle(device->handle, "_EJD", &temp); | |
1038 | if (ACPI_SUCCESS(status)) | |
1039 | device->flags.ejectable = 1; | |
1040 | else { | |
1041 | status = acpi_get_handle(device->handle, "_EJ0", &temp); | |
1042 | if (ACPI_SUCCESS(status)) | |
1043 | device->flags.ejectable = 1; | |
1044 | } | |
1045 | ||
1046 | /* Presence of _LCK indicates 'lockable' */ | |
1047 | status = acpi_get_handle(device->handle, "_LCK", &temp); | |
1048 | if (ACPI_SUCCESS(status)) | |
1049 | device->flags.lockable = 1; | |
1050 | ||
7bed50c5 RW |
1051 | /* Power resources cannot be power manageable. */ |
1052 | if (device->device_type == ACPI_BUS_TYPE_POWER) | |
1053 | return 0; | |
1054 | ||
1da177e4 LT |
1055 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ |
1056 | status = acpi_get_handle(device->handle, "_PS0", &temp); | |
1057 | if (ACPI_FAILURE(status)) | |
1058 | status = acpi_get_handle(device->handle, "_PR0", &temp); | |
1059 | if (ACPI_SUCCESS(status)) | |
1060 | device->flags.power_manageable = 1; | |
1061 | ||
3c5f9be4 | 1062 | /* TBD: Performance management */ |
1da177e4 | 1063 | |
d550d98d | 1064 | return 0; |
1da177e4 LT |
1065 | } |
1066 | ||
c7bcb4e9 | 1067 | static void acpi_device_get_busid(struct acpi_device *device) |
1da177e4 | 1068 | { |
4be44fcd LB |
1069 | char bus_id[5] = { '?', 0 }; |
1070 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
1071 | int i = 0; | |
1da177e4 LT |
1072 | |
1073 | /* | |
1074 | * Bus ID | |
1075 | * ------ | |
1076 | * The device's Bus ID is simply the object name. | |
1077 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
1078 | */ | |
859ac9a4 | 1079 | if (ACPI_IS_ROOT_DEVICE(device)) { |
1da177e4 | 1080 | strcpy(device->pnp.bus_id, "ACPI"); |
859ac9a4 BH |
1081 | return; |
1082 | } | |
1083 | ||
1084 | switch (device->device_type) { | |
1da177e4 LT |
1085 | case ACPI_BUS_TYPE_POWER_BUTTON: |
1086 | strcpy(device->pnp.bus_id, "PWRF"); | |
1087 | break; | |
1088 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
1089 | strcpy(device->pnp.bus_id, "SLPF"); | |
1090 | break; | |
1091 | default: | |
66b7ed40 | 1092 | acpi_get_name(device->handle, ACPI_SINGLE_NAME, &buffer); |
1da177e4 LT |
1093 | /* Clean up trailing underscores (if any) */ |
1094 | for (i = 3; i > 1; i--) { | |
1095 | if (bus_id[i] == '_') | |
1096 | bus_id[i] = '\0'; | |
1097 | else | |
1098 | break; | |
1099 | } | |
1100 | strcpy(device->pnp.bus_id, bus_id); | |
1101 | break; | |
1102 | } | |
1103 | } | |
1104 | ||
54735266 ZR |
1105 | /* |
1106 | * acpi_bay_match - see if a device is an ejectable driver bay | |
1107 | * | |
1108 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
1109 | * then we can safely call it an ejectable drive bay | |
1110 | */ | |
1111 | static int acpi_bay_match(struct acpi_device *device){ | |
1112 | acpi_status status; | |
1113 | acpi_handle handle; | |
1114 | acpi_handle tmp; | |
1115 | acpi_handle phandle; | |
1116 | ||
1117 | handle = device->handle; | |
1118 | ||
1119 | status = acpi_get_handle(handle, "_EJ0", &tmp); | |
1120 | if (ACPI_FAILURE(status)) | |
1121 | return -ENODEV; | |
1122 | ||
1123 | if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || | |
1124 | (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || | |
1125 | (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || | |
1126 | (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) | |
1127 | return 0; | |
1128 | ||
1129 | if (acpi_get_parent(handle, &phandle)) | |
1130 | return -ENODEV; | |
1131 | ||
1132 | if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) || | |
1133 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) || | |
1134 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) || | |
1135 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp)))) | |
1136 | return 0; | |
1137 | ||
1138 | return -ENODEV; | |
1139 | } | |
1140 | ||
3620f2f2 FS |
1141 | /* |
1142 | * acpi_dock_match - see if a device has a _DCK method | |
1143 | */ | |
1144 | static int acpi_dock_match(struct acpi_device *device) | |
1145 | { | |
1146 | acpi_handle tmp; | |
1147 | return acpi_get_handle(device->handle, "_DCK", &tmp); | |
1148 | } | |
1149 | ||
620e112c | 1150 | const char *acpi_device_hid(struct acpi_device *device) |
15b8dd53 | 1151 | { |
7f47fa6c | 1152 | struct acpi_hardware_id *hid; |
15b8dd53 | 1153 | |
2b2ae7c7 TR |
1154 | if (list_empty(&device->pnp.ids)) |
1155 | return dummy_hid; | |
1156 | ||
7f47fa6c BH |
1157 | hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list); |
1158 | return hid->id; | |
1159 | } | |
1160 | EXPORT_SYMBOL(acpi_device_hid); | |
15b8dd53 | 1161 | |
7f47fa6c BH |
1162 | static void acpi_add_id(struct acpi_device *device, const char *dev_id) |
1163 | { | |
1164 | struct acpi_hardware_id *id; | |
15b8dd53 | 1165 | |
7f47fa6c BH |
1166 | id = kmalloc(sizeof(*id), GFP_KERNEL); |
1167 | if (!id) | |
1168 | return; | |
15b8dd53 | 1169 | |
581de59e | 1170 | id->id = kstrdup(dev_id, GFP_KERNEL); |
7f47fa6c BH |
1171 | if (!id->id) { |
1172 | kfree(id); | |
1173 | return; | |
15b8dd53 BM |
1174 | } |
1175 | ||
7f47fa6c | 1176 | list_add_tail(&id->list, &device->pnp.ids); |
15b8dd53 BM |
1177 | } |
1178 | ||
222e82ac DW |
1179 | /* |
1180 | * Old IBM workstations have a DSDT bug wherein the SMBus object | |
1181 | * lacks the SMBUS01 HID and the methods do not have the necessary "_" | |
1182 | * prefix. Work around this. | |
1183 | */ | |
1184 | static int acpi_ibm_smbus_match(struct acpi_device *device) | |
1185 | { | |
1186 | acpi_handle h_dummy; | |
1187 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
1188 | int result; | |
1189 | ||
1190 | if (!dmi_name_in_vendors("IBM")) | |
1191 | return -ENODEV; | |
1192 | ||
1193 | /* Look for SMBS object */ | |
1194 | result = acpi_get_name(device->handle, ACPI_SINGLE_NAME, &path); | |
1195 | if (result) | |
1196 | return result; | |
1197 | ||
1198 | if (strcmp("SMBS", path.pointer)) { | |
1199 | result = -ENODEV; | |
1200 | goto out; | |
1201 | } | |
1202 | ||
1203 | /* Does it have the necessary (but misnamed) methods? */ | |
1204 | result = -ENODEV; | |
1205 | if (ACPI_SUCCESS(acpi_get_handle(device->handle, "SBI", &h_dummy)) && | |
1206 | ACPI_SUCCESS(acpi_get_handle(device->handle, "SBR", &h_dummy)) && | |
1207 | ACPI_SUCCESS(acpi_get_handle(device->handle, "SBW", &h_dummy))) | |
1208 | result = 0; | |
1209 | out: | |
1210 | kfree(path.pointer); | |
1211 | return result; | |
1212 | } | |
1213 | ||
c7bcb4e9 | 1214 | static void acpi_device_set_id(struct acpi_device *device) |
1da177e4 | 1215 | { |
4be44fcd | 1216 | acpi_status status; |
57f3674f BH |
1217 | struct acpi_device_info *info; |
1218 | struct acpica_device_id_list *cid_list; | |
7f47fa6c | 1219 | int i; |
1da177e4 | 1220 | |
c7bcb4e9 | 1221 | switch (device->device_type) { |
1da177e4 | 1222 | case ACPI_BUS_TYPE_DEVICE: |
859ac9a4 | 1223 | if (ACPI_IS_ROOT_DEVICE(device)) { |
57f3674f | 1224 | acpi_add_id(device, ACPI_SYSTEM_HID); |
859ac9a4 BH |
1225 | break; |
1226 | } | |
1227 | ||
66b7ed40 | 1228 | status = acpi_get_object_info(device->handle, &info); |
1da177e4 | 1229 | if (ACPI_FAILURE(status)) { |
96b2dd1f | 1230 | printk(KERN_ERR PREFIX "%s: Error reading device info\n", __func__); |
1da177e4 LT |
1231 | return; |
1232 | } | |
1233 | ||
1da177e4 | 1234 | if (info->valid & ACPI_VALID_HID) |
57f3674f BH |
1235 | acpi_add_id(device, info->hardware_id.string); |
1236 | if (info->valid & ACPI_VALID_CID) { | |
15b8dd53 | 1237 | cid_list = &info->compatible_id_list; |
57f3674f BH |
1238 | for (i = 0; i < cid_list->count; i++) |
1239 | acpi_add_id(device, cid_list->ids[i].string); | |
1240 | } | |
1da177e4 LT |
1241 | if (info->valid & ACPI_VALID_ADR) { |
1242 | device->pnp.bus_address = info->address; | |
1243 | device->flags.bus_address = 1; | |
1244 | } | |
ae843332 | 1245 | |
a83893ae BH |
1246 | kfree(info); |
1247 | ||
57f3674f BH |
1248 | /* |
1249 | * Some devices don't reliably have _HIDs & _CIDs, so add | |
1250 | * synthetic HIDs to make sure drivers can find them. | |
1251 | */ | |
c3d6de69 | 1252 | if (acpi_is_video_device(device)) |
57f3674f | 1253 | acpi_add_id(device, ACPI_VIDEO_HID); |
3620f2f2 | 1254 | else if (ACPI_SUCCESS(acpi_bay_match(device))) |
57f3674f | 1255 | acpi_add_id(device, ACPI_BAY_HID); |
3620f2f2 | 1256 | else if (ACPI_SUCCESS(acpi_dock_match(device))) |
57f3674f | 1257 | acpi_add_id(device, ACPI_DOCK_HID); |
222e82ac DW |
1258 | else if (!acpi_ibm_smbus_match(device)) |
1259 | acpi_add_id(device, ACPI_SMBUS_IBM_HID); | |
b7b30de5 BH |
1260 | else if (!acpi_device_hid(device) && |
1261 | ACPI_IS_ROOT_DEVICE(device->parent)) { | |
1262 | acpi_add_id(device, ACPI_BUS_HID); /* \_SB, LNXSYBUS */ | |
1263 | strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME); | |
1264 | strcpy(device->pnp.device_class, ACPI_BUS_CLASS); | |
1265 | } | |
54735266 | 1266 | |
1da177e4 LT |
1267 | break; |
1268 | case ACPI_BUS_TYPE_POWER: | |
57f3674f | 1269 | acpi_add_id(device, ACPI_POWER_HID); |
1da177e4 LT |
1270 | break; |
1271 | case ACPI_BUS_TYPE_PROCESSOR: | |
57f3674f | 1272 | acpi_add_id(device, ACPI_PROCESSOR_OBJECT_HID); |
1da177e4 | 1273 | break; |
1da177e4 | 1274 | case ACPI_BUS_TYPE_THERMAL: |
57f3674f | 1275 | acpi_add_id(device, ACPI_THERMAL_HID); |
1da177e4 LT |
1276 | break; |
1277 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
57f3674f | 1278 | acpi_add_id(device, ACPI_BUTTON_HID_POWERF); |
1da177e4 LT |
1279 | break; |
1280 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
57f3674f | 1281 | acpi_add_id(device, ACPI_BUTTON_HID_SLEEPF); |
1da177e4 LT |
1282 | break; |
1283 | } | |
1da177e4 LT |
1284 | } |
1285 | ||
bc3b0772 | 1286 | static int acpi_device_set_context(struct acpi_device *device) |
1da177e4 | 1287 | { |
bc3b0772 BH |
1288 | acpi_status status; |
1289 | ||
1da177e4 LT |
1290 | /* |
1291 | * Context | |
1292 | * ------- | |
1293 | * Attach this 'struct acpi_device' to the ACPI object. This makes | |
bc3b0772 BH |
1294 | * resolutions from handle->device very efficient. Fixed hardware |
1295 | * devices have no handles, so we skip them. | |
1da177e4 | 1296 | */ |
bc3b0772 BH |
1297 | if (!device->handle) |
1298 | return 0; | |
1da177e4 | 1299 | |
bc3b0772 BH |
1300 | status = acpi_attach_data(device->handle, |
1301 | acpi_bus_data_handler, device); | |
1302 | if (ACPI_SUCCESS(status)) | |
1303 | return 0; | |
1304 | ||
1305 | printk(KERN_ERR PREFIX "Error attaching device data\n"); | |
1306 | return -ENODEV; | |
1da177e4 LT |
1307 | } |
1308 | ||
4be44fcd | 1309 | static int acpi_bus_remove(struct acpi_device *dev, int rmdevice) |
1da177e4 | 1310 | { |
1da177e4 | 1311 | if (!dev) |
d550d98d | 1312 | return -EINVAL; |
1da177e4 | 1313 | |
96333578 | 1314 | dev->removal_type = ACPI_BUS_REMOVAL_EJECT; |
1890a97a | 1315 | device_release_driver(&dev->dev); |
1da177e4 LT |
1316 | |
1317 | if (!rmdevice) | |
d550d98d | 1318 | return 0; |
1da177e4 | 1319 | |
2786f6e3 RZ |
1320 | /* |
1321 | * unbind _ADR-Based Devices when hot removal | |
1322 | */ | |
1da177e4 LT |
1323 | if (dev->flags.bus_address) { |
1324 | if ((dev->parent) && (dev->parent->ops.unbind)) | |
1325 | dev->parent->ops.unbind(dev); | |
1326 | } | |
1da177e4 LT |
1327 | acpi_device_unregister(dev, ACPI_BUS_REMOVAL_EJECT); |
1328 | ||
d550d98d | 1329 | return 0; |
1da177e4 LT |
1330 | } |
1331 | ||
5c478f49 BH |
1332 | static int acpi_add_single_object(struct acpi_device **child, |
1333 | acpi_handle handle, int type, | |
778cbc1d | 1334 | unsigned long long sta, |
5c478f49 | 1335 | struct acpi_bus_ops *ops) |
1da177e4 | 1336 | { |
77c24888 BH |
1337 | int result; |
1338 | struct acpi_device *device; | |
29aaefa6 | 1339 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 1340 | |
36bcbec7 | 1341 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 1342 | if (!device) { |
6468463a | 1343 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 1344 | return -ENOMEM; |
1da177e4 | 1345 | } |
1da177e4 | 1346 | |
7f47fa6c | 1347 | INIT_LIST_HEAD(&device->pnp.ids); |
caaa6efb | 1348 | device->device_type = type; |
1da177e4 | 1349 | device->handle = handle; |
5c478f49 | 1350 | device->parent = acpi_bus_get_parent(handle); |
c4168bff | 1351 | device->bus_ops = *ops; /* workround for not call .start */ |
778cbc1d | 1352 | STRUCT_TO_INT(device->status) = sta; |
c4168bff | 1353 | |
c7bcb4e9 | 1354 | acpi_device_get_busid(device); |
1da177e4 LT |
1355 | |
1356 | /* | |
1357 | * Flags | |
1358 | * ----- | |
778cbc1d BH |
1359 | * Note that we only look for object handles -- cannot evaluate objects |
1360 | * until we know the device is present and properly initialized. | |
1da177e4 LT |
1361 | */ |
1362 | result = acpi_bus_get_flags(device); | |
1363 | if (result) | |
1364 | goto end; | |
1365 | ||
1da177e4 LT |
1366 | /* |
1367 | * Initialize Device | |
1368 | * ----------------- | |
1369 | * TBD: Synch with Core's enumeration/initialization process. | |
1370 | */ | |
c7bcb4e9 | 1371 | acpi_device_set_id(device); |
1da177e4 LT |
1372 | |
1373 | /* | |
1374 | * Power Management | |
1375 | * ---------------- | |
1376 | */ | |
1377 | if (device->flags.power_manageable) { | |
1378 | result = acpi_bus_get_power_flags(device); | |
1379 | if (result) | |
1380 | goto end; | |
1381 | } | |
1382 | ||
4be44fcd | 1383 | /* |
1da177e4 LT |
1384 | * Wakeup device management |
1385 | *----------------------- | |
1386 | */ | |
d57d09a4 | 1387 | acpi_bus_get_wakeup_device_flags(device); |
1da177e4 LT |
1388 | |
1389 | /* | |
1390 | * Performance Management | |
1391 | * ---------------------- | |
1392 | */ | |
1393 | if (device->flags.performance_manageable) { | |
1394 | result = acpi_bus_get_perf_flags(device); | |
1395 | if (result) | |
1396 | goto end; | |
1397 | } | |
1398 | ||
bc3b0772 | 1399 | if ((result = acpi_device_set_context(device))) |
f61f9258 | 1400 | goto end; |
1da177e4 | 1401 | |
66b7ed40 | 1402 | result = acpi_device_register(device); |
1da177e4 LT |
1403 | |
1404 | /* | |
2786f6e3 | 1405 | * Bind _ADR-Based Devices when hot add |
1da177e4 LT |
1406 | */ |
1407 | if (device->flags.bus_address) { | |
1408 | if (device->parent && device->parent->ops.bind) | |
1409 | device->parent->ops.bind(device); | |
1410 | } | |
1411 | ||
0c526d96 | 1412 | end: |
29aaefa6 BH |
1413 | if (!result) { |
1414 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1415 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
1416 | "Adding %s [%s] parent %s\n", dev_name(&device->dev), | |
1417 | (char *) buffer.pointer, | |
1418 | device->parent ? dev_name(&device->parent->dev) : | |
1419 | "(null)")); | |
1420 | kfree(buffer.pointer); | |
1da177e4 | 1421 | *child = device; |
29aaefa6 | 1422 | } else |
718fb0de | 1423 | acpi_device_release(&device->dev); |
1da177e4 | 1424 | |
d550d98d | 1425 | return result; |
1da177e4 | 1426 | } |
1da177e4 | 1427 | |
778cbc1d BH |
1428 | #define ACPI_STA_DEFAULT (ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | \ |
1429 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING) | |
1430 | ||
bf325f95 RW |
1431 | static void acpi_bus_add_power_resource(acpi_handle handle) |
1432 | { | |
1433 | struct acpi_bus_ops ops = { | |
1434 | .acpi_op_add = 1, | |
1435 | .acpi_op_start = 1, | |
1436 | }; | |
1437 | struct acpi_device *device = NULL; | |
1438 | ||
1439 | acpi_bus_get_device(handle, &device); | |
1440 | if (!device) | |
1441 | acpi_add_single_object(&device, handle, ACPI_BUS_TYPE_POWER, | |
1442 | ACPI_STA_DEFAULT, &ops); | |
1443 | } | |
1444 | ||
778cbc1d BH |
1445 | static int acpi_bus_type_and_status(acpi_handle handle, int *type, |
1446 | unsigned long long *sta) | |
1da177e4 | 1447 | { |
778cbc1d BH |
1448 | acpi_status status; |
1449 | acpi_object_type acpi_type; | |
1da177e4 | 1450 | |
778cbc1d | 1451 | status = acpi_get_type(handle, &acpi_type); |
51a85faf | 1452 | if (ACPI_FAILURE(status)) |
778cbc1d | 1453 | return -ENODEV; |
4be44fcd | 1454 | |
778cbc1d | 1455 | switch (acpi_type) { |
51a85faf BH |
1456 | case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */ |
1457 | case ACPI_TYPE_DEVICE: | |
778cbc1d BH |
1458 | *type = ACPI_BUS_TYPE_DEVICE; |
1459 | status = acpi_bus_get_status_handle(handle, sta); | |
1460 | if (ACPI_FAILURE(status)) | |
1461 | return -ENODEV; | |
51a85faf BH |
1462 | break; |
1463 | case ACPI_TYPE_PROCESSOR: | |
778cbc1d BH |
1464 | *type = ACPI_BUS_TYPE_PROCESSOR; |
1465 | status = acpi_bus_get_status_handle(handle, sta); | |
1466 | if (ACPI_FAILURE(status)) | |
1467 | return -ENODEV; | |
51a85faf BH |
1468 | break; |
1469 | case ACPI_TYPE_THERMAL: | |
778cbc1d BH |
1470 | *type = ACPI_BUS_TYPE_THERMAL; |
1471 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1472 | break; |
1473 | case ACPI_TYPE_POWER: | |
778cbc1d BH |
1474 | *type = ACPI_BUS_TYPE_POWER; |
1475 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1476 | break; |
1477 | default: | |
778cbc1d | 1478 | return -ENODEV; |
51a85faf | 1479 | } |
1da177e4 | 1480 | |
778cbc1d BH |
1481 | return 0; |
1482 | } | |
1483 | ||
1484 | static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl, | |
1485 | void *context, void **return_value) | |
1486 | { | |
1487 | struct acpi_bus_ops *ops = context; | |
778cbc1d BH |
1488 | int type; |
1489 | unsigned long long sta; | |
e3b87f8a BH |
1490 | struct acpi_device *device; |
1491 | acpi_status status; | |
778cbc1d BH |
1492 | int result; |
1493 | ||
1494 | result = acpi_bus_type_and_status(handle, &type, &sta); | |
1495 | if (result) | |
1496 | return AE_OK; | |
1497 | ||
1498 | if (!(sta & ACPI_STA_DEVICE_PRESENT) && | |
b581a7f9 | 1499 | !(sta & ACPI_STA_DEVICE_FUNCTIONING)) { |
86e4e20e RW |
1500 | struct acpi_device_wakeup wakeup; |
1501 | acpi_handle temp; | |
1502 | ||
1503 | status = acpi_get_handle(handle, "_PRW", &temp); | |
1504 | if (ACPI_SUCCESS(status)) | |
1505 | acpi_bus_extract_wakeup_device_power_package(handle, | |
1506 | &wakeup); | |
778cbc1d | 1507 | return AE_CTRL_DEPTH; |
b581a7f9 | 1508 | } |
778cbc1d | 1509 | |
e3b87f8a BH |
1510 | /* |
1511 | * We may already have an acpi_device from a previous enumeration. If | |
1512 | * so, we needn't add it again, but we may still have to start it. | |
1513 | */ | |
1514 | device = NULL; | |
1515 | acpi_bus_get_device(handle, &device); | |
1516 | if (ops->acpi_op_add && !device) | |
1517 | acpi_add_single_object(&device, handle, type, sta, ops); | |
1da177e4 | 1518 | |
e3b87f8a | 1519 | if (!device) |
51a85faf | 1520 | return AE_CTRL_DEPTH; |
1da177e4 | 1521 | |
51a85faf BH |
1522 | if (ops->acpi_op_start && !(ops->acpi_op_add)) { |
1523 | status = acpi_start_single_object(device); | |
1da177e4 | 1524 | if (ACPI_FAILURE(status)) |
51a85faf BH |
1525 | return AE_CTRL_DEPTH; |
1526 | } | |
1da177e4 | 1527 | |
51a85faf BH |
1528 | if (!*return_value) |
1529 | *return_value = device; | |
1530 | return AE_OK; | |
1531 | } | |
3fb02738 | 1532 | |
51a85faf BH |
1533 | static int acpi_bus_scan(acpi_handle handle, struct acpi_bus_ops *ops, |
1534 | struct acpi_device **child) | |
1535 | { | |
1536 | acpi_status status; | |
51a85faf | 1537 | void *device = NULL; |
3fb02738 | 1538 | |
51a85faf BH |
1539 | status = acpi_bus_check_add(handle, 0, ops, &device); |
1540 | if (ACPI_SUCCESS(status)) | |
1541 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
2263576c | 1542 | acpi_bus_check_add, NULL, ops, &device); |
1da177e4 | 1543 | |
51a85faf BH |
1544 | if (child) |
1545 | *child = device; | |
7779688f TR |
1546 | |
1547 | if (device) | |
1548 | return 0; | |
1549 | else | |
1550 | return -ENODEV; | |
1da177e4 | 1551 | } |
1da177e4 | 1552 | |
7779688f TR |
1553 | /* |
1554 | * acpi_bus_add and acpi_bus_start | |
1555 | * | |
1556 | * scan a given ACPI tree and (probably recently hot-plugged) | |
1557 | * create and add or starts found devices. | |
1558 | * | |
1559 | * If no devices were found -ENODEV is returned which does not | |
1560 | * mean that this is a real error, there just have been no suitable | |
1561 | * ACPI objects in the table trunk from which the kernel could create | |
1562 | * a device and add/start an appropriate driver. | |
1563 | */ | |
1564 | ||
3fb02738 | 1565 | int |
4be44fcd LB |
1566 | acpi_bus_add(struct acpi_device **child, |
1567 | struct acpi_device *parent, acpi_handle handle, int type) | |
3fb02738 | 1568 | { |
3fb02738 RS |
1569 | struct acpi_bus_ops ops; |
1570 | ||
c4168bff LS |
1571 | memset(&ops, 0, sizeof(ops)); |
1572 | ops.acpi_op_add = 1; | |
3fb02738 | 1573 | |
7779688f | 1574 | return acpi_bus_scan(handle, &ops, child); |
3fb02738 RS |
1575 | } |
1576 | EXPORT_SYMBOL(acpi_bus_add); | |
1577 | ||
4be44fcd | 1578 | int acpi_bus_start(struct acpi_device *device) |
3fb02738 | 1579 | { |
3fb02738 | 1580 | struct acpi_bus_ops ops; |
a2100801 | 1581 | int result; |
3fb02738 | 1582 | |
d2f6650a TR |
1583 | if (!device) |
1584 | return -EINVAL; | |
1585 | ||
8e029bf0 BH |
1586 | memset(&ops, 0, sizeof(ops)); |
1587 | ops.acpi_op_start = 1; | |
3fb02738 | 1588 | |
a2100801 RW |
1589 | result = acpi_bus_scan(device->handle, &ops, NULL); |
1590 | ||
3a37898d | 1591 | acpi_update_all_gpes(); |
a2100801 RW |
1592 | |
1593 | return result; | |
3fb02738 RS |
1594 | } |
1595 | EXPORT_SYMBOL(acpi_bus_start); | |
1da177e4 | 1596 | |
ceaba663 | 1597 | int acpi_bus_trim(struct acpi_device *start, int rmdevice) |
1da177e4 | 1598 | { |
4be44fcd LB |
1599 | acpi_status status; |
1600 | struct acpi_device *parent, *child; | |
1601 | acpi_handle phandle, chandle; | |
1602 | acpi_object_type type; | |
1603 | u32 level = 1; | |
1604 | int err = 0; | |
1605 | ||
1606 | parent = start; | |
1da177e4 LT |
1607 | phandle = start->handle; |
1608 | child = chandle = NULL; | |
1609 | ||
1610 | while ((level > 0) && parent && (!err)) { | |
1611 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, | |
4be44fcd | 1612 | chandle, &chandle); |
1da177e4 LT |
1613 | |
1614 | /* | |
1615 | * If this scope is exhausted then move our way back up. | |
1616 | */ | |
1617 | if (ACPI_FAILURE(status)) { | |
1618 | level--; | |
1619 | chandle = phandle; | |
1620 | acpi_get_parent(phandle, &phandle); | |
1621 | child = parent; | |
1622 | parent = parent->parent; | |
1623 | ||
1624 | if (level == 0) | |
1625 | err = acpi_bus_remove(child, rmdevice); | |
1626 | else | |
1627 | err = acpi_bus_remove(child, 1); | |
1628 | ||
1629 | continue; | |
1630 | } | |
1631 | ||
1632 | status = acpi_get_type(chandle, &type); | |
1633 | if (ACPI_FAILURE(status)) { | |
1634 | continue; | |
1635 | } | |
1636 | /* | |
1637 | * If there is a device corresponding to chandle then | |
1638 | * parse it (depth-first). | |
1639 | */ | |
1640 | if (acpi_bus_get_device(chandle, &child) == 0) { | |
1641 | level++; | |
1642 | phandle = chandle; | |
1643 | chandle = NULL; | |
1644 | parent = child; | |
1645 | } | |
1646 | continue; | |
1647 | } | |
1648 | return err; | |
1649 | } | |
ceaba663 KA |
1650 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
1651 | ||
e8b945c9 | 1652 | static int acpi_bus_scan_fixed(void) |
1da177e4 | 1653 | { |
4be44fcd LB |
1654 | int result = 0; |
1655 | struct acpi_device *device = NULL; | |
c4168bff | 1656 | struct acpi_bus_ops ops; |
1da177e4 | 1657 | |
c4168bff LS |
1658 | memset(&ops, 0, sizeof(ops)); |
1659 | ops.acpi_op_add = 1; | |
1660 | ops.acpi_op_start = 1; | |
1661 | ||
1da177e4 LT |
1662 | /* |
1663 | * Enumerate all fixed-feature devices. | |
1664 | */ | |
cee324b1 | 1665 | if ((acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON) == 0) { |
5c478f49 | 1666 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1667 | ACPI_BUS_TYPE_POWER_BUTTON, |
778cbc1d | 1668 | ACPI_STA_DEFAULT, |
c4168bff | 1669 | &ops); |
c10d7a13 | 1670 | device_init_wakeup(&device->dev, true); |
3fb02738 | 1671 | } |
1da177e4 | 1672 | |
cee324b1 | 1673 | if ((acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON) == 0) { |
5c478f49 | 1674 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1675 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
778cbc1d | 1676 | ACPI_STA_DEFAULT, |
c4168bff | 1677 | &ops); |
3fb02738 | 1678 | } |
1da177e4 | 1679 | |
d550d98d | 1680 | return result; |
1da177e4 LT |
1681 | } |
1682 | ||
e747f274 | 1683 | int __init acpi_scan_init(void) |
1da177e4 LT |
1684 | { |
1685 | int result; | |
3fb02738 | 1686 | struct acpi_bus_ops ops; |
1da177e4 | 1687 | |
c4168bff LS |
1688 | memset(&ops, 0, sizeof(ops)); |
1689 | ops.acpi_op_add = 1; | |
1690 | ops.acpi_op_start = 1; | |
1da177e4 | 1691 | |
5b327265 PM |
1692 | result = bus_register(&acpi_bus_type); |
1693 | if (result) { | |
1694 | /* We don't want to quit even if we failed to add suspend/resume */ | |
1695 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
1696 | } | |
1697 | ||
97d9a9e9 RW |
1698 | acpi_power_init(); |
1699 | ||
1da177e4 LT |
1700 | /* |
1701 | * Enumerate devices in the ACPI namespace. | |
1702 | */ | |
51a85faf | 1703 | result = acpi_bus_scan(ACPI_ROOT_OBJECT, &ops, &acpi_root); |
c04209a7 | 1704 | |
c4168bff | 1705 | if (!result) |
adc08e20 | 1706 | result = acpi_bus_scan_fixed(); |
1da177e4 LT |
1707 | |
1708 | if (result) | |
1709 | acpi_device_unregister(acpi_root, ACPI_BUS_REMOVAL_NORMAL); | |
a2100801 | 1710 | else |
3a37898d | 1711 | acpi_update_all_gpes(); |
1da177e4 | 1712 | |
d550d98d | 1713 | return result; |
1da177e4 | 1714 | } |