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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> |
1da177e4 LT |
13 | |
14 | #include <acpi/acpi_drivers.h> | |
1da177e4 | 15 | |
e60cc7a6 BH |
16 | #include "internal.h" |
17 | ||
1da177e4 | 18 | #define _COMPONENT ACPI_BUS_COMPONENT |
f52fd66d | 19 | ACPI_MODULE_NAME("scan"); |
1da177e4 | 20 | #define STRUCT_TO_INT(s) (*((int*)&s)) |
4be44fcd | 21 | extern struct acpi_device *acpi_root; |
1da177e4 LT |
22 | |
23 | #define ACPI_BUS_CLASS "system_bus" | |
29b71a1c | 24 | #define ACPI_BUS_HID "LNXSYBUS" |
1da177e4 LT |
25 | #define ACPI_BUS_DEVICE_NAME "System Bus" |
26 | ||
859ac9a4 BH |
27 | #define ACPI_IS_ROOT_DEVICE(device) (!(device)->parent) |
28 | ||
1da177e4 | 29 | static LIST_HEAD(acpi_device_list); |
e49bd2dd | 30 | static LIST_HEAD(acpi_bus_id_list); |
9090589d | 31 | DEFINE_MUTEX(acpi_device_lock); |
1da177e4 LT |
32 | LIST_HEAD(acpi_wakeup_device_list); |
33 | ||
e49bd2dd | 34 | struct acpi_device_bus_id{ |
bb095854 | 35 | char bus_id[15]; |
e49bd2dd ZR |
36 | unsigned int instance_no; |
37 | struct list_head node; | |
1da177e4 | 38 | }; |
29b71a1c TR |
39 | |
40 | /* | |
41 | * Creates hid/cid(s) string needed for modalias and uevent | |
42 | * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: | |
43 | * char *modalias: "acpi:IBM0001:ACPI0001" | |
44 | */ | |
b3e572d2 AB |
45 | static int create_modalias(struct acpi_device *acpi_dev, char *modalias, |
46 | int size) | |
47 | { | |
29b71a1c | 48 | int len; |
5c9fcb5d | 49 | int count; |
7f47fa6c | 50 | struct acpi_hardware_id *id; |
29b71a1c | 51 | |
5c9fcb5d | 52 | len = snprintf(modalias, size, "acpi:"); |
29b71a1c TR |
53 | size -= len; |
54 | ||
7f47fa6c BH |
55 | list_for_each_entry(id, &acpi_dev->pnp.ids, list) { |
56 | count = snprintf(&modalias[len], size, "%s:", id->id); | |
5c9fcb5d ZR |
57 | if (count < 0 || count >= size) |
58 | return -EINVAL; | |
59 | len += count; | |
60 | size -= count; | |
61 | } | |
62 | ||
29b71a1c TR |
63 | modalias[len] = '\0'; |
64 | return len; | |
65 | } | |
66 | ||
67 | static ssize_t | |
68 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
69 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
70 | int len; | |
71 | ||
72 | /* Device has no HID and no CID or string is >1024 */ | |
73 | len = create_modalias(acpi_dev, buf, 1024); | |
74 | if (len <= 0) | |
75 | return 0; | |
76 | buf[len++] = '\n'; | |
77 | return len; | |
78 | } | |
79 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); | |
80 | ||
c8d72a5e | 81 | static void acpi_bus_hot_remove_device(void *context) |
1da177e4 | 82 | { |
26d46867 ZR |
83 | struct acpi_device *device; |
84 | acpi_handle handle = context; | |
1da177e4 LT |
85 | struct acpi_object_list arg_list; |
86 | union acpi_object arg; | |
87 | acpi_status status = AE_OK; | |
1da177e4 | 88 | |
26d46867 | 89 | if (acpi_bus_get_device(handle, &device)) |
c8d72a5e | 90 | return; |
26d46867 ZR |
91 | |
92 | if (!device) | |
c8d72a5e | 93 | return; |
26d46867 ZR |
94 | |
95 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
0794469d | 96 | "Hot-removing device %s...\n", dev_name(&device->dev))); |
26d46867 ZR |
97 | |
98 | if (acpi_bus_trim(device, 1)) { | |
55ac9a01 LM |
99 | printk(KERN_ERR PREFIX |
100 | "Removing device failed\n"); | |
c8d72a5e | 101 | return; |
26d46867 | 102 | } |
1da177e4 | 103 | |
26d46867 ZR |
104 | /* power off device */ |
105 | status = acpi_evaluate_object(handle, "_PS3", NULL, NULL); | |
106 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) | |
55ac9a01 LM |
107 | printk(KERN_WARNING PREFIX |
108 | "Power-off device failed\n"); | |
26d46867 ZR |
109 | |
110 | if (device->flags.lockable) { | |
1da177e4 LT |
111 | arg_list.count = 1; |
112 | arg_list.pointer = &arg; | |
113 | arg.type = ACPI_TYPE_INTEGER; | |
114 | arg.integer.value = 0; | |
115 | acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); | |
116 | } | |
1da177e4 | 117 | |
1da177e4 LT |
118 | arg_list.count = 1; |
119 | arg_list.pointer = &arg; | |
120 | arg.type = ACPI_TYPE_INTEGER; | |
121 | arg.integer.value = 1; | |
1da177e4 | 122 | |
1da177e4 LT |
123 | /* |
124 | * TBD: _EJD support. | |
125 | */ | |
1da177e4 | 126 | status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); |
26d46867 | 127 | if (ACPI_FAILURE(status)) |
c8d72a5e ZR |
128 | printk(KERN_WARNING PREFIX |
129 | "Eject device failed\n"); | |
1da177e4 | 130 | |
c8d72a5e | 131 | return; |
1da177e4 LT |
132 | } |
133 | ||
1da177e4 | 134 | static ssize_t |
f883d9db PM |
135 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
136 | const char *buf, size_t count) | |
1da177e4 | 137 | { |
4be44fcd | 138 | int ret = count; |
4be44fcd | 139 | acpi_status status; |
4be44fcd | 140 | acpi_object_type type = 0; |
f883d9db | 141 | struct acpi_device *acpi_device = to_acpi_device(d); |
1da177e4 | 142 | |
1da177e4 LT |
143 | if ((!count) || (buf[0] != '1')) { |
144 | return -EINVAL; | |
145 | } | |
1da177e4 | 146 | #ifndef FORCE_EJECT |
f883d9db | 147 | if (acpi_device->driver == NULL) { |
1da177e4 LT |
148 | ret = -ENODEV; |
149 | goto err; | |
150 | } | |
151 | #endif | |
f883d9db PM |
152 | status = acpi_get_type(acpi_device->handle, &type); |
153 | if (ACPI_FAILURE(status) || (!acpi_device->flags.ejectable)) { | |
1da177e4 LT |
154 | ret = -ENODEV; |
155 | goto err; | |
156 | } | |
1da177e4 | 157 | |
c8d72a5e | 158 | acpi_os_hotplug_execute(acpi_bus_hot_remove_device, acpi_device->handle); |
74523c90 | 159 | err: |
1da177e4 | 160 | return ret; |
1da177e4 LT |
161 | } |
162 | ||
f883d9db | 163 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
1da177e4 | 164 | |
e49bd2dd ZR |
165 | static ssize_t |
166 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
167 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1da177e4 | 168 | |
ea8d82fd | 169 | return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev)); |
1da177e4 | 170 | } |
e49bd2dd | 171 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
1da177e4 | 172 | |
e49bd2dd ZR |
173 | static ssize_t |
174 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
175 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
176 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
177 | int result; | |
1da177e4 | 178 | |
e49bd2dd | 179 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
0c526d96 | 180 | if (result) |
e49bd2dd | 181 | goto end; |
1da177e4 | 182 | |
e49bd2dd ZR |
183 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
184 | kfree(path.pointer); | |
0c526d96 | 185 | end: |
e49bd2dd | 186 | return result; |
1da177e4 | 187 | } |
e49bd2dd | 188 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
1da177e4 | 189 | |
e49bd2dd | 190 | static int acpi_device_setup_files(struct acpi_device *dev) |
1da177e4 | 191 | { |
f883d9db PM |
192 | acpi_status status; |
193 | acpi_handle temp; | |
e49bd2dd | 194 | int result = 0; |
1da177e4 LT |
195 | |
196 | /* | |
e49bd2dd | 197 | * Devices gotten from FADT don't have a "path" attribute |
1da177e4 | 198 | */ |
0c526d96 | 199 | if (dev->handle) { |
e49bd2dd | 200 | result = device_create_file(&dev->dev, &dev_attr_path); |
0c526d96 | 201 | if (result) |
e49bd2dd | 202 | goto end; |
1da177e4 LT |
203 | } |
204 | ||
1131b938 BH |
205 | result = device_create_file(&dev->dev, &dev_attr_hid); |
206 | if (result) | |
207 | goto end; | |
1da177e4 | 208 | |
1131b938 BH |
209 | result = device_create_file(&dev->dev, &dev_attr_modalias); |
210 | if (result) | |
211 | goto end; | |
29b71a1c | 212 | |
e49bd2dd ZR |
213 | /* |
214 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
215 | * hot-removal function from userland. | |
216 | */ | |
f883d9db PM |
217 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); |
218 | if (ACPI_SUCCESS(status)) | |
e49bd2dd | 219 | result = device_create_file(&dev->dev, &dev_attr_eject); |
0c526d96 | 220 | end: |
e49bd2dd | 221 | return result; |
1da177e4 LT |
222 | } |
223 | ||
f883d9db | 224 | static void acpi_device_remove_files(struct acpi_device *dev) |
1da177e4 | 225 | { |
f883d9db PM |
226 | acpi_status status; |
227 | acpi_handle temp; | |
1da177e4 | 228 | |
f883d9db PM |
229 | /* |
230 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
231 | * hot-removal function from userland. | |
232 | */ | |
233 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); | |
234 | if (ACPI_SUCCESS(status)) | |
235 | device_remove_file(&dev->dev, &dev_attr_eject); | |
1da177e4 | 236 | |
1131b938 BH |
237 | device_remove_file(&dev->dev, &dev_attr_modalias); |
238 | device_remove_file(&dev->dev, &dev_attr_hid); | |
0c526d96 | 239 | if (dev->handle) |
e49bd2dd | 240 | device_remove_file(&dev->dev, &dev_attr_path); |
1da177e4 | 241 | } |
1da177e4 | 242 | /* -------------------------------------------------------------------------- |
9e89dde2 | 243 | ACPI Bus operations |
1da177e4 | 244 | -------------------------------------------------------------------------- */ |
29b71a1c TR |
245 | |
246 | int acpi_match_device_ids(struct acpi_device *device, | |
247 | const struct acpi_device_id *ids) | |
248 | { | |
249 | const struct acpi_device_id *id; | |
7f47fa6c | 250 | struct acpi_hardware_id *hwid; |
29b71a1c | 251 | |
39a0ad87 ZY |
252 | /* |
253 | * If the device is not present, it is unnecessary to load device | |
254 | * driver for it. | |
255 | */ | |
256 | if (!device->status.present) | |
257 | return -ENODEV; | |
258 | ||
7f47fa6c BH |
259 | for (id = ids; id->id[0]; id++) |
260 | list_for_each_entry(hwid, &device->pnp.ids, list) | |
261 | if (!strcmp((char *) id->id, hwid->id)) | |
29b71a1c | 262 | return 0; |
29b71a1c TR |
263 | |
264 | return -ENOENT; | |
265 | } | |
266 | EXPORT_SYMBOL(acpi_match_device_ids); | |
267 | ||
7f47fa6c BH |
268 | static void acpi_free_ids(struct acpi_device *device) |
269 | { | |
270 | struct acpi_hardware_id *id, *tmp; | |
271 | ||
272 | list_for_each_entry_safe(id, tmp, &device->pnp.ids, list) { | |
273 | kfree(id->id); | |
274 | kfree(id); | |
275 | } | |
276 | } | |
277 | ||
1890a97a | 278 | static void acpi_device_release(struct device *dev) |
1da177e4 | 279 | { |
1890a97a | 280 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 281 | |
7f47fa6c | 282 | acpi_free_ids(acpi_dev); |
1890a97a | 283 | kfree(acpi_dev); |
1da177e4 LT |
284 | } |
285 | ||
5d9464a4 | 286 | static int acpi_device_suspend(struct device *dev, pm_message_t state) |
1da177e4 | 287 | { |
5d9464a4 PM |
288 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
289 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
1da177e4 | 290 | |
5d9464a4 PM |
291 | if (acpi_drv && acpi_drv->ops.suspend) |
292 | return acpi_drv->ops.suspend(acpi_dev, state); | |
1da177e4 LT |
293 | return 0; |
294 | } | |
1da177e4 | 295 | |
5d9464a4 | 296 | static int acpi_device_resume(struct device *dev) |
9e89dde2 | 297 | { |
5d9464a4 PM |
298 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
299 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
1da177e4 | 300 | |
5d9464a4 PM |
301 | if (acpi_drv && acpi_drv->ops.resume) |
302 | return acpi_drv->ops.resume(acpi_dev); | |
d550d98d | 303 | return 0; |
1da177e4 LT |
304 | } |
305 | ||
5d9464a4 | 306 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 307 | { |
5d9464a4 PM |
308 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
309 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
1da177e4 | 310 | |
29b71a1c | 311 | return !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
5d9464a4 | 312 | } |
1da177e4 | 313 | |
7eff2e7a | 314 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 | 315 | { |
5d9464a4 | 316 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
7eff2e7a | 317 | int len; |
5d9464a4 | 318 | |
7eff2e7a KS |
319 | if (add_uevent_var(env, "MODALIAS=")) |
320 | return -ENOMEM; | |
321 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], | |
322 | sizeof(env->buf) - env->buflen); | |
323 | if (len >= (sizeof(env->buf) - env->buflen)) | |
324 | return -ENOMEM; | |
325 | env->buflen += len; | |
9e89dde2 | 326 | return 0; |
1da177e4 LT |
327 | } |
328 | ||
46ec8598 BH |
329 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
330 | { | |
331 | struct acpi_device *device = data; | |
332 | ||
333 | device->driver->ops.notify(device, event); | |
334 | } | |
335 | ||
336 | static acpi_status acpi_device_notify_fixed(void *data) | |
337 | { | |
338 | struct acpi_device *device = data; | |
339 | ||
53de5356 BH |
340 | /* Fixed hardware devices have no handles */ |
341 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); | |
46ec8598 BH |
342 | return AE_OK; |
343 | } | |
344 | ||
345 | static int acpi_device_install_notify_handler(struct acpi_device *device) | |
346 | { | |
347 | acpi_status status; | |
46ec8598 | 348 | |
ccba2a36 | 349 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
350 | status = |
351 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
352 | acpi_device_notify_fixed, | |
353 | device); | |
ccba2a36 | 354 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
355 | status = |
356 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
357 | acpi_device_notify_fixed, | |
358 | device); | |
359 | else | |
360 | status = acpi_install_notify_handler(device->handle, | |
361 | ACPI_DEVICE_NOTIFY, | |
362 | acpi_device_notify, | |
363 | device); | |
364 | ||
365 | if (ACPI_FAILURE(status)) | |
366 | return -EINVAL; | |
367 | return 0; | |
368 | } | |
369 | ||
370 | static void acpi_device_remove_notify_handler(struct acpi_device *device) | |
371 | { | |
ccba2a36 | 372 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
373 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, |
374 | acpi_device_notify_fixed); | |
ccba2a36 | 375 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
376 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, |
377 | acpi_device_notify_fixed); | |
378 | else | |
379 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, | |
380 | acpi_device_notify); | |
381 | } | |
382 | ||
5d9464a4 PM |
383 | static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *); |
384 | static int acpi_start_single_object(struct acpi_device *); | |
385 | static int acpi_device_probe(struct device * dev) | |
1da177e4 | 386 | { |
5d9464a4 PM |
387 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
388 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
389 | int ret; | |
390 | ||
391 | ret = acpi_bus_driver_init(acpi_dev, acpi_drv); | |
392 | if (!ret) { | |
c4168bff LS |
393 | if (acpi_dev->bus_ops.acpi_op_start) |
394 | acpi_start_single_object(acpi_dev); | |
46ec8598 BH |
395 | |
396 | if (acpi_drv->ops.notify) { | |
397 | ret = acpi_device_install_notify_handler(acpi_dev); | |
398 | if (ret) { | |
46ec8598 BH |
399 | if (acpi_drv->ops.remove) |
400 | acpi_drv->ops.remove(acpi_dev, | |
401 | acpi_dev->removal_type); | |
402 | return ret; | |
403 | } | |
404 | } | |
405 | ||
5d9464a4 PM |
406 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
407 | "Found driver [%s] for device [%s]\n", | |
408 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
409 | get_device(dev); | |
410 | } | |
411 | return ret; | |
412 | } | |
1da177e4 | 413 | |
5d9464a4 PM |
414 | static int acpi_device_remove(struct device * dev) |
415 | { | |
416 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
417 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
418 | ||
419 | if (acpi_drv) { | |
46ec8598 BH |
420 | if (acpi_drv->ops.notify) |
421 | acpi_device_remove_notify_handler(acpi_dev); | |
5d9464a4 | 422 | if (acpi_drv->ops.remove) |
96333578 | 423 | acpi_drv->ops.remove(acpi_dev, acpi_dev->removal_type); |
1da177e4 | 424 | } |
5d9464a4 | 425 | acpi_dev->driver = NULL; |
db89b4f0 | 426 | acpi_dev->driver_data = NULL; |
1da177e4 | 427 | |
5d9464a4 | 428 | put_device(dev); |
9e89dde2 ZR |
429 | return 0; |
430 | } | |
1da177e4 | 431 | |
55955aad | 432 | struct bus_type acpi_bus_type = { |
9e89dde2 ZR |
433 | .name = "acpi", |
434 | .suspend = acpi_device_suspend, | |
435 | .resume = acpi_device_resume, | |
5d9464a4 PM |
436 | .match = acpi_bus_match, |
437 | .probe = acpi_device_probe, | |
438 | .remove = acpi_device_remove, | |
439 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
440 | }; |
441 | ||
66b7ed40 | 442 | static int acpi_device_register(struct acpi_device *device) |
1da177e4 | 443 | { |
4be44fcd | 444 | int result; |
e49bd2dd ZR |
445 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
446 | int found = 0; | |
66b7ed40 | 447 | |
9e89dde2 ZR |
448 | /* |
449 | * Linkage | |
450 | * ------- | |
451 | * Link this device to its parent and siblings. | |
452 | */ | |
453 | INIT_LIST_HEAD(&device->children); | |
454 | INIT_LIST_HEAD(&device->node); | |
9e89dde2 | 455 | INIT_LIST_HEAD(&device->wakeup_list); |
1da177e4 | 456 | |
e49bd2dd ZR |
457 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
458 | if (!new_bus_id) { | |
459 | printk(KERN_ERR PREFIX "Memory allocation error\n"); | |
460 | return -ENOMEM; | |
1da177e4 | 461 | } |
e49bd2dd | 462 | |
9090589d | 463 | mutex_lock(&acpi_device_lock); |
e49bd2dd ZR |
464 | /* |
465 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
466 | * If failed, create one and link it into acpi_bus_id_list | |
467 | */ | |
468 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
1131b938 BH |
469 | if (!strcmp(acpi_device_bus_id->bus_id, |
470 | acpi_device_hid(device))) { | |
471 | acpi_device_bus_id->instance_no++; | |
e49bd2dd ZR |
472 | found = 1; |
473 | kfree(new_bus_id); | |
474 | break; | |
475 | } | |
1da177e4 | 476 | } |
0c526d96 | 477 | if (!found) { |
e49bd2dd | 478 | acpi_device_bus_id = new_bus_id; |
1131b938 | 479 | strcpy(acpi_device_bus_id->bus_id, acpi_device_hid(device)); |
e49bd2dd ZR |
480 | acpi_device_bus_id->instance_no = 0; |
481 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 482 | } |
0794469d | 483 | dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 484 | |
33b57150 | 485 | if (device->parent) |
9e89dde2 | 486 | list_add_tail(&device->node, &device->parent->children); |
33b57150 | 487 | |
9e89dde2 ZR |
488 | if (device->wakeup.flags.valid) |
489 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
9090589d | 490 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 491 | |
1890a97a | 492 | if (device->parent) |
66b7ed40 | 493 | device->dev.parent = &device->parent->dev; |
1890a97a | 494 | device->dev.bus = &acpi_bus_type; |
1890a97a | 495 | device->dev.release = &acpi_device_release; |
8b12b922 | 496 | result = device_register(&device->dev); |
0c526d96 | 497 | if (result) { |
8b12b922 | 498 | dev_err(&device->dev, "Error registering device\n"); |
e49bd2dd | 499 | goto end; |
1da177e4 | 500 | } |
1da177e4 | 501 | |
e49bd2dd | 502 | result = acpi_device_setup_files(device); |
0c526d96 | 503 | if (result) |
0794469d KS |
504 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
505 | dev_name(&device->dev)); | |
1da177e4 | 506 | |
96333578 | 507 | device->removal_type = ACPI_BUS_REMOVAL_NORMAL; |
1da177e4 | 508 | return 0; |
0c526d96 | 509 | end: |
9090589d | 510 | mutex_lock(&acpi_device_lock); |
33b57150 | 511 | if (device->parent) |
e49bd2dd | 512 | list_del(&device->node); |
e49bd2dd | 513 | list_del(&device->wakeup_list); |
9090589d | 514 | mutex_unlock(&acpi_device_lock); |
e49bd2dd | 515 | return result; |
1da177e4 LT |
516 | } |
517 | ||
9e89dde2 ZR |
518 | static void acpi_device_unregister(struct acpi_device *device, int type) |
519 | { | |
9090589d | 520 | mutex_lock(&acpi_device_lock); |
33b57150 | 521 | if (device->parent) |
9e89dde2 | 522 | list_del(&device->node); |
1da177e4 | 523 | |
9e89dde2 | 524 | list_del(&device->wakeup_list); |
9090589d | 525 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 526 | |
9e89dde2 | 527 | acpi_detach_data(device->handle, acpi_bus_data_handler); |
1890a97a | 528 | |
f883d9db | 529 | acpi_device_remove_files(device); |
1890a97a | 530 | device_unregister(&device->dev); |
1da177e4 LT |
531 | } |
532 | ||
9e89dde2 ZR |
533 | /* -------------------------------------------------------------------------- |
534 | Driver Management | |
535 | -------------------------------------------------------------------------- */ | |
1da177e4 | 536 | /** |
d758a8fa RD |
537 | * acpi_bus_driver_init - add a device to a driver |
538 | * @device: the device to add and initialize | |
539 | * @driver: driver for the device | |
540 | * | |
0c526d96 | 541 | * Used to initialize a device via its device driver. Called whenever a |
1890a97a | 542 | * driver is bound to a device. Invokes the driver's add() ops. |
1da177e4 LT |
543 | */ |
544 | static int | |
4be44fcd | 545 | acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) |
1da177e4 | 546 | { |
4be44fcd | 547 | int result = 0; |
1da177e4 | 548 | |
1da177e4 | 549 | if (!device || !driver) |
d550d98d | 550 | return -EINVAL; |
1da177e4 LT |
551 | |
552 | if (!driver->ops.add) | |
d550d98d | 553 | return -ENOSYS; |
1da177e4 LT |
554 | |
555 | result = driver->ops.add(device); | |
556 | if (result) { | |
557 | device->driver = NULL; | |
db89b4f0 | 558 | device->driver_data = NULL; |
d550d98d | 559 | return result; |
1da177e4 LT |
560 | } |
561 | ||
562 | device->driver = driver; | |
563 | ||
564 | /* | |
565 | * TBD - Configuration Management: Assign resources to device based | |
566 | * upon possible configuration and currently allocated resources. | |
567 | */ | |
568 | ||
4be44fcd LB |
569 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
570 | "Driver successfully bound to device\n")); | |
d550d98d | 571 | return 0; |
3fb02738 RS |
572 | } |
573 | ||
8713cbef | 574 | static int acpi_start_single_object(struct acpi_device *device) |
3fb02738 RS |
575 | { |
576 | int result = 0; | |
577 | struct acpi_driver *driver; | |
578 | ||
3fb02738 RS |
579 | |
580 | if (!(driver = device->driver)) | |
d550d98d | 581 | return 0; |
3fb02738 | 582 | |
1da177e4 LT |
583 | if (driver->ops.start) { |
584 | result = driver->ops.start(device); | |
585 | if (result && driver->ops.remove) | |
586 | driver->ops.remove(device, ACPI_BUS_REMOVAL_NORMAL); | |
1da177e4 LT |
587 | } |
588 | ||
d550d98d | 589 | return result; |
1da177e4 LT |
590 | } |
591 | ||
9e89dde2 ZR |
592 | /** |
593 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
594 | * @driver: driver being registered | |
595 | * | |
596 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
597 | * devices that match the driver's criteria and binds. Returns zero for | |
598 | * success or a negative error status for failure. | |
599 | */ | |
600 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
1da177e4 | 601 | { |
1890a97a | 602 | int ret; |
1da177e4 | 603 | |
9e89dde2 ZR |
604 | if (acpi_disabled) |
605 | return -ENODEV; | |
1890a97a PM |
606 | driver->drv.name = driver->name; |
607 | driver->drv.bus = &acpi_bus_type; | |
608 | driver->drv.owner = driver->owner; | |
1da177e4 | 609 | |
1890a97a PM |
610 | ret = driver_register(&driver->drv); |
611 | return ret; | |
9e89dde2 | 612 | } |
1da177e4 | 613 | |
9e89dde2 ZR |
614 | EXPORT_SYMBOL(acpi_bus_register_driver); |
615 | ||
616 | /** | |
617 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus | |
618 | * @driver: driver to unregister | |
619 | * | |
620 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
621 | * devices that match the driver's criteria and unbinds. | |
622 | */ | |
623 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
624 | { | |
1890a97a | 625 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
626 | } |
627 | ||
628 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
629 | ||
9e89dde2 ZR |
630 | /* -------------------------------------------------------------------------- |
631 | Device Enumeration | |
632 | -------------------------------------------------------------------------- */ | |
5c478f49 BH |
633 | static struct acpi_device *acpi_bus_get_parent(acpi_handle handle) |
634 | { | |
635 | acpi_status status; | |
636 | int ret; | |
637 | struct acpi_device *device; | |
638 | ||
639 | /* | |
640 | * Fixed hardware devices do not appear in the namespace and do not | |
641 | * have handles, but we fabricate acpi_devices for them, so we have | |
642 | * to deal with them specially. | |
643 | */ | |
644 | if (handle == NULL) | |
645 | return acpi_root; | |
646 | ||
647 | do { | |
648 | status = acpi_get_parent(handle, &handle); | |
649 | if (status == AE_NULL_ENTRY) | |
650 | return NULL; | |
651 | if (ACPI_FAILURE(status)) | |
652 | return acpi_root; | |
653 | ||
654 | ret = acpi_bus_get_device(handle, &device); | |
655 | if (ret == 0) | |
656 | return device; | |
657 | } while (1); | |
658 | } | |
659 | ||
9e89dde2 ZR |
660 | acpi_status |
661 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
662 | { | |
663 | acpi_status status; | |
664 | acpi_handle tmp; | |
665 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
666 | union acpi_object *obj; | |
667 | ||
668 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
669 | if (ACPI_FAILURE(status)) | |
670 | return status; | |
671 | ||
672 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
673 | if (ACPI_SUCCESS(status)) { | |
674 | obj = buffer.pointer; | |
3b5fee59 HM |
675 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
676 | ejd); | |
9e89dde2 ZR |
677 | kfree(buffer.pointer); |
678 | } | |
679 | return status; | |
680 | } | |
681 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
682 | ||
8e4319c4 | 683 | void acpi_bus_data_handler(acpi_handle handle, void *context) |
9e89dde2 ZR |
684 | { |
685 | ||
686 | /* TBD */ | |
687 | ||
688 | return; | |
689 | } | |
690 | ||
9e89dde2 ZR |
691 | static int acpi_bus_get_perf_flags(struct acpi_device *device) |
692 | { | |
693 | device->performance.state = ACPI_STATE_UNKNOWN; | |
694 | return 0; | |
695 | } | |
696 | ||
697 | static acpi_status | |
698 | acpi_bus_extract_wakeup_device_power_package(struct acpi_device *device, | |
699 | union acpi_object *package) | |
700 | { | |
701 | int i = 0; | |
702 | union acpi_object *element = NULL; | |
703 | ||
704 | if (!device || !package || (package->package.count < 2)) | |
705 | return AE_BAD_PARAMETER; | |
706 | ||
707 | element = &(package->package.elements[0]); | |
708 | if (!element) | |
709 | return AE_BAD_PARAMETER; | |
710 | if (element->type == ACPI_TYPE_PACKAGE) { | |
711 | if ((element->package.count < 2) || | |
712 | (element->package.elements[0].type != | |
713 | ACPI_TYPE_LOCAL_REFERENCE) | |
714 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) | |
715 | return AE_BAD_DATA; | |
716 | device->wakeup.gpe_device = | |
717 | element->package.elements[0].reference.handle; | |
718 | device->wakeup.gpe_number = | |
719 | (u32) element->package.elements[1].integer.value; | |
720 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
721 | device->wakeup.gpe_number = element->integer.value; | |
722 | } else | |
723 | return AE_BAD_DATA; | |
724 | ||
725 | element = &(package->package.elements[1]); | |
726 | if (element->type != ACPI_TYPE_INTEGER) { | |
727 | return AE_BAD_DATA; | |
728 | } | |
729 | device->wakeup.sleep_state = element->integer.value; | |
730 | ||
731 | if ((package->package.count - 2) > ACPI_MAX_HANDLES) { | |
732 | return AE_NO_MEMORY; | |
733 | } | |
734 | device->wakeup.resources.count = package->package.count - 2; | |
735 | for (i = 0; i < device->wakeup.resources.count; i++) { | |
736 | element = &(package->package.elements[i + 2]); | |
cd0b2248 | 737 | if (element->type != ACPI_TYPE_LOCAL_REFERENCE) |
9e89dde2 | 738 | return AE_BAD_DATA; |
9e89dde2 ZR |
739 | |
740 | device->wakeup.resources.handles[i] = element->reference.handle; | |
1da177e4 | 741 | } |
9e89dde2 ZR |
742 | |
743 | return AE_OK; | |
1da177e4 LT |
744 | } |
745 | ||
f517709d | 746 | static void acpi_bus_set_run_wake_flags(struct acpi_device *device) |
1da177e4 | 747 | { |
29b71a1c TR |
748 | struct acpi_device_id button_device_ids[] = { |
749 | {"PNP0C0D", 0}, | |
750 | {"PNP0C0C", 0}, | |
751 | {"PNP0C0E", 0}, | |
752 | {"", 0}, | |
753 | }; | |
f517709d RW |
754 | acpi_status status; |
755 | acpi_event_status event_status; | |
756 | ||
757 | device->wakeup.run_wake_count = 0; | |
b67ea761 | 758 | device->wakeup.flags.notifier_present = 0; |
f517709d RW |
759 | |
760 | /* Power button, Lid switch always enable wakeup */ | |
761 | if (!acpi_match_device_ids(device, button_device_ids)) { | |
762 | device->wakeup.flags.run_wake = 1; | |
763 | device->wakeup.flags.always_enabled = 1; | |
764 | return; | |
765 | } | |
766 | ||
767 | status = acpi_get_gpe_status(NULL, device->wakeup.gpe_number, | |
768 | ACPI_NOT_ISR, &event_status); | |
769 | if (status == AE_OK) | |
770 | device->wakeup.flags.run_wake = | |
771 | !!(event_status & ACPI_EVENT_FLAG_HANDLE); | |
772 | } | |
773 | ||
774 | static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device) | |
775 | { | |
776 | acpi_status status = 0; | |
777 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
778 | union acpi_object *package = NULL; | |
779 | int psw_error; | |
29b71a1c | 780 | |
9e89dde2 ZR |
781 | /* _PRW */ |
782 | status = acpi_evaluate_object(device->handle, "_PRW", NULL, &buffer); | |
783 | if (ACPI_FAILURE(status)) { | |
784 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
785 | goto end; | |
1da177e4 | 786 | } |
1da177e4 | 787 | |
9e89dde2 ZR |
788 | package = (union acpi_object *)buffer.pointer; |
789 | status = acpi_bus_extract_wakeup_device_power_package(device, package); | |
790 | if (ACPI_FAILURE(status)) { | |
791 | ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package")); | |
792 | goto end; | |
793 | } | |
1da177e4 | 794 | |
9e89dde2 | 795 | kfree(buffer.pointer); |
1da177e4 | 796 | |
9e89dde2 | 797 | device->wakeup.flags.valid = 1; |
9b83ccd2 | 798 | device->wakeup.prepare_count = 0; |
f517709d | 799 | acpi_bus_set_run_wake_flags(device); |
729b2bdb ZY |
800 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
801 | * system for the ACPI device with the _PRW object. | |
802 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. | |
803 | * So it is necessary to call _DSW object first. Only when it is not | |
804 | * present will the _PSW object used. | |
805 | */ | |
77e76609 RW |
806 | psw_error = acpi_device_sleep_wake(device, 0, 0, 0); |
807 | if (psw_error) | |
808 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
809 | "error in _DSW or _PSW evaluation\n")); | |
810 | ||
0c526d96 | 811 | end: |
9e89dde2 ZR |
812 | if (ACPI_FAILURE(status)) |
813 | device->flags.wake_capable = 0; | |
d550d98d | 814 | return 0; |
1da177e4 | 815 | } |
1da177e4 | 816 | |
9e89dde2 | 817 | static int acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 818 | { |
9e89dde2 ZR |
819 | acpi_status status = 0; |
820 | acpi_handle handle = NULL; | |
821 | u32 i = 0; | |
1a365616 | 822 | |
4be44fcd | 823 | |
9e89dde2 ZR |
824 | /* |
825 | * Power Management Flags | |
826 | */ | |
827 | status = acpi_get_handle(device->handle, "_PSC", &handle); | |
828 | if (ACPI_SUCCESS(status)) | |
829 | device->power.flags.explicit_get = 1; | |
830 | status = acpi_get_handle(device->handle, "_IRC", &handle); | |
831 | if (ACPI_SUCCESS(status)) | |
832 | device->power.flags.inrush_current = 1; | |
1da177e4 | 833 | |
9e89dde2 ZR |
834 | /* |
835 | * Enumerate supported power management states | |
836 | */ | |
837 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3; i++) { | |
838 | struct acpi_device_power_state *ps = &device->power.states[i]; | |
839 | char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' }; | |
1da177e4 | 840 | |
9e89dde2 ZR |
841 | /* Evaluate "_PRx" to se if power resources are referenced */ |
842 | acpi_evaluate_reference(device->handle, object_name, NULL, | |
843 | &ps->resources); | |
844 | if (ps->resources.count) { | |
845 | device->power.flags.power_resources = 1; | |
846 | ps->flags.valid = 1; | |
1da177e4 | 847 | } |
1da177e4 | 848 | |
9e89dde2 ZR |
849 | /* Evaluate "_PSx" to see if we can do explicit sets */ |
850 | object_name[2] = 'S'; | |
851 | status = acpi_get_handle(device->handle, object_name, &handle); | |
852 | if (ACPI_SUCCESS(status)) { | |
853 | ps->flags.explicit_set = 1; | |
854 | ps->flags.valid = 1; | |
1da177e4 | 855 | } |
1da177e4 | 856 | |
9e89dde2 ZR |
857 | /* State is valid if we have some power control */ |
858 | if (ps->resources.count || ps->flags.explicit_set) | |
859 | ps->flags.valid = 1; | |
1da177e4 | 860 | |
9e89dde2 ZR |
861 | ps->power = -1; /* Unknown - driver assigned */ |
862 | ps->latency = -1; /* Unknown - driver assigned */ | |
863 | } | |
1da177e4 | 864 | |
9e89dde2 ZR |
865 | /* Set defaults for D0 and D3 states (always valid) */ |
866 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
867 | device->power.states[ACPI_STATE_D0].power = 100; | |
868 | device->power.states[ACPI_STATE_D3].flags.valid = 1; | |
869 | device->power.states[ACPI_STATE_D3].power = 0; | |
c8f7a62c | 870 | |
9e89dde2 | 871 | /* TBD: System wake support and resource requirements. */ |
c8f7a62c | 872 | |
9e89dde2 | 873 | device->power.state = ACPI_STATE_UNKNOWN; |
a51e145f | 874 | acpi_bus_get_power(device->handle, &(device->power.state)); |
c8f7a62c | 875 | |
9e89dde2 ZR |
876 | return 0; |
877 | } | |
c8f7a62c | 878 | |
4be44fcd | 879 | static int acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 880 | { |
4be44fcd LB |
881 | acpi_status status = AE_OK; |
882 | acpi_handle temp = NULL; | |
1da177e4 | 883 | |
1da177e4 LT |
884 | |
885 | /* Presence of _STA indicates 'dynamic_status' */ | |
886 | status = acpi_get_handle(device->handle, "_STA", &temp); | |
887 | if (ACPI_SUCCESS(status)) | |
888 | device->flags.dynamic_status = 1; | |
889 | ||
1da177e4 LT |
890 | /* Presence of _RMV indicates 'removable' */ |
891 | status = acpi_get_handle(device->handle, "_RMV", &temp); | |
892 | if (ACPI_SUCCESS(status)) | |
893 | device->flags.removable = 1; | |
894 | ||
895 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
896 | status = acpi_get_handle(device->handle, "_EJD", &temp); | |
897 | if (ACPI_SUCCESS(status)) | |
898 | device->flags.ejectable = 1; | |
899 | else { | |
900 | status = acpi_get_handle(device->handle, "_EJ0", &temp); | |
901 | if (ACPI_SUCCESS(status)) | |
902 | device->flags.ejectable = 1; | |
903 | } | |
904 | ||
905 | /* Presence of _LCK indicates 'lockable' */ | |
906 | status = acpi_get_handle(device->handle, "_LCK", &temp); | |
907 | if (ACPI_SUCCESS(status)) | |
908 | device->flags.lockable = 1; | |
909 | ||
910 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ | |
911 | status = acpi_get_handle(device->handle, "_PS0", &temp); | |
912 | if (ACPI_FAILURE(status)) | |
913 | status = acpi_get_handle(device->handle, "_PR0", &temp); | |
914 | if (ACPI_SUCCESS(status)) | |
915 | device->flags.power_manageable = 1; | |
916 | ||
917 | /* Presence of _PRW indicates wake capable */ | |
918 | status = acpi_get_handle(device->handle, "_PRW", &temp); | |
919 | if (ACPI_SUCCESS(status)) | |
920 | device->flags.wake_capable = 1; | |
921 | ||
3c5f9be4 | 922 | /* TBD: Performance management */ |
1da177e4 | 923 | |
d550d98d | 924 | return 0; |
1da177e4 LT |
925 | } |
926 | ||
c7bcb4e9 | 927 | static void acpi_device_get_busid(struct acpi_device *device) |
1da177e4 | 928 | { |
4be44fcd LB |
929 | char bus_id[5] = { '?', 0 }; |
930 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
931 | int i = 0; | |
1da177e4 LT |
932 | |
933 | /* | |
934 | * Bus ID | |
935 | * ------ | |
936 | * The device's Bus ID is simply the object name. | |
937 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
938 | */ | |
859ac9a4 | 939 | if (ACPI_IS_ROOT_DEVICE(device)) { |
1da177e4 | 940 | strcpy(device->pnp.bus_id, "ACPI"); |
859ac9a4 BH |
941 | return; |
942 | } | |
943 | ||
944 | switch (device->device_type) { | |
1da177e4 LT |
945 | case ACPI_BUS_TYPE_POWER_BUTTON: |
946 | strcpy(device->pnp.bus_id, "PWRF"); | |
947 | break; | |
948 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
949 | strcpy(device->pnp.bus_id, "SLPF"); | |
950 | break; | |
951 | default: | |
66b7ed40 | 952 | acpi_get_name(device->handle, ACPI_SINGLE_NAME, &buffer); |
1da177e4 LT |
953 | /* Clean up trailing underscores (if any) */ |
954 | for (i = 3; i > 1; i--) { | |
955 | if (bus_id[i] == '_') | |
956 | bus_id[i] = '\0'; | |
957 | else | |
958 | break; | |
959 | } | |
960 | strcpy(device->pnp.bus_id, bus_id); | |
961 | break; | |
962 | } | |
963 | } | |
964 | ||
54735266 ZR |
965 | /* |
966 | * acpi_bay_match - see if a device is an ejectable driver bay | |
967 | * | |
968 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
969 | * then we can safely call it an ejectable drive bay | |
970 | */ | |
971 | static int acpi_bay_match(struct acpi_device *device){ | |
972 | acpi_status status; | |
973 | acpi_handle handle; | |
974 | acpi_handle tmp; | |
975 | acpi_handle phandle; | |
976 | ||
977 | handle = device->handle; | |
978 | ||
979 | status = acpi_get_handle(handle, "_EJ0", &tmp); | |
980 | if (ACPI_FAILURE(status)) | |
981 | return -ENODEV; | |
982 | ||
983 | if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || | |
984 | (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || | |
985 | (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || | |
986 | (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) | |
987 | return 0; | |
988 | ||
989 | if (acpi_get_parent(handle, &phandle)) | |
990 | return -ENODEV; | |
991 | ||
992 | if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) || | |
993 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) || | |
994 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) || | |
995 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp)))) | |
996 | return 0; | |
997 | ||
998 | return -ENODEV; | |
999 | } | |
1000 | ||
3620f2f2 FS |
1001 | /* |
1002 | * acpi_dock_match - see if a device has a _DCK method | |
1003 | */ | |
1004 | static int acpi_dock_match(struct acpi_device *device) | |
1005 | { | |
1006 | acpi_handle tmp; | |
1007 | return acpi_get_handle(device->handle, "_DCK", &tmp); | |
1008 | } | |
1009 | ||
7f47fa6c | 1010 | char *acpi_device_hid(struct acpi_device *device) |
15b8dd53 | 1011 | { |
7f47fa6c | 1012 | struct acpi_hardware_id *hid; |
15b8dd53 | 1013 | |
7f47fa6c BH |
1014 | hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list); |
1015 | return hid->id; | |
1016 | } | |
1017 | EXPORT_SYMBOL(acpi_device_hid); | |
15b8dd53 | 1018 | |
7f47fa6c BH |
1019 | static void acpi_add_id(struct acpi_device *device, const char *dev_id) |
1020 | { | |
1021 | struct acpi_hardware_id *id; | |
15b8dd53 | 1022 | |
7f47fa6c BH |
1023 | id = kmalloc(sizeof(*id), GFP_KERNEL); |
1024 | if (!id) | |
1025 | return; | |
15b8dd53 | 1026 | |
7f47fa6c BH |
1027 | id->id = kmalloc(strlen(dev_id) + 1, GFP_KERNEL); |
1028 | if (!id->id) { | |
1029 | kfree(id); | |
1030 | return; | |
15b8dd53 BM |
1031 | } |
1032 | ||
7f47fa6c BH |
1033 | strcpy(id->id, dev_id); |
1034 | list_add_tail(&id->list, &device->pnp.ids); | |
15b8dd53 BM |
1035 | } |
1036 | ||
222e82ac DW |
1037 | /* |
1038 | * Old IBM workstations have a DSDT bug wherein the SMBus object | |
1039 | * lacks the SMBUS01 HID and the methods do not have the necessary "_" | |
1040 | * prefix. Work around this. | |
1041 | */ | |
1042 | static int acpi_ibm_smbus_match(struct acpi_device *device) | |
1043 | { | |
1044 | acpi_handle h_dummy; | |
1045 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
1046 | int result; | |
1047 | ||
1048 | if (!dmi_name_in_vendors("IBM")) | |
1049 | return -ENODEV; | |
1050 | ||
1051 | /* Look for SMBS object */ | |
1052 | result = acpi_get_name(device->handle, ACPI_SINGLE_NAME, &path); | |
1053 | if (result) | |
1054 | return result; | |
1055 | ||
1056 | if (strcmp("SMBS", path.pointer)) { | |
1057 | result = -ENODEV; | |
1058 | goto out; | |
1059 | } | |
1060 | ||
1061 | /* Does it have the necessary (but misnamed) methods? */ | |
1062 | result = -ENODEV; | |
1063 | if (ACPI_SUCCESS(acpi_get_handle(device->handle, "SBI", &h_dummy)) && | |
1064 | ACPI_SUCCESS(acpi_get_handle(device->handle, "SBR", &h_dummy)) && | |
1065 | ACPI_SUCCESS(acpi_get_handle(device->handle, "SBW", &h_dummy))) | |
1066 | result = 0; | |
1067 | out: | |
1068 | kfree(path.pointer); | |
1069 | return result; | |
1070 | } | |
1071 | ||
c7bcb4e9 | 1072 | static void acpi_device_set_id(struct acpi_device *device) |
1da177e4 | 1073 | { |
4be44fcd | 1074 | acpi_status status; |
57f3674f BH |
1075 | struct acpi_device_info *info; |
1076 | struct acpica_device_id_list *cid_list; | |
7f47fa6c | 1077 | int i; |
1da177e4 | 1078 | |
c7bcb4e9 | 1079 | switch (device->device_type) { |
1da177e4 | 1080 | case ACPI_BUS_TYPE_DEVICE: |
859ac9a4 | 1081 | if (ACPI_IS_ROOT_DEVICE(device)) { |
57f3674f | 1082 | acpi_add_id(device, ACPI_SYSTEM_HID); |
859ac9a4 BH |
1083 | break; |
1084 | } | |
1085 | ||
66b7ed40 | 1086 | status = acpi_get_object_info(device->handle, &info); |
1da177e4 | 1087 | if (ACPI_FAILURE(status)) { |
96b2dd1f | 1088 | printk(KERN_ERR PREFIX "%s: Error reading device info\n", __func__); |
1da177e4 LT |
1089 | return; |
1090 | } | |
1091 | ||
1da177e4 | 1092 | if (info->valid & ACPI_VALID_HID) |
57f3674f BH |
1093 | acpi_add_id(device, info->hardware_id.string); |
1094 | if (info->valid & ACPI_VALID_CID) { | |
15b8dd53 | 1095 | cid_list = &info->compatible_id_list; |
57f3674f BH |
1096 | for (i = 0; i < cid_list->count; i++) |
1097 | acpi_add_id(device, cid_list->ids[i].string); | |
1098 | } | |
1da177e4 LT |
1099 | if (info->valid & ACPI_VALID_ADR) { |
1100 | device->pnp.bus_address = info->address; | |
1101 | device->flags.bus_address = 1; | |
1102 | } | |
ae843332 | 1103 | |
a83893ae BH |
1104 | kfree(info); |
1105 | ||
57f3674f BH |
1106 | /* |
1107 | * Some devices don't reliably have _HIDs & _CIDs, so add | |
1108 | * synthetic HIDs to make sure drivers can find them. | |
1109 | */ | |
c3d6de69 | 1110 | if (acpi_is_video_device(device)) |
57f3674f | 1111 | acpi_add_id(device, ACPI_VIDEO_HID); |
3620f2f2 | 1112 | else if (ACPI_SUCCESS(acpi_bay_match(device))) |
57f3674f | 1113 | acpi_add_id(device, ACPI_BAY_HID); |
3620f2f2 | 1114 | else if (ACPI_SUCCESS(acpi_dock_match(device))) |
57f3674f | 1115 | acpi_add_id(device, ACPI_DOCK_HID); |
222e82ac DW |
1116 | else if (!acpi_ibm_smbus_match(device)) |
1117 | acpi_add_id(device, ACPI_SMBUS_IBM_HID); | |
b7b30de5 BH |
1118 | else if (!acpi_device_hid(device) && |
1119 | ACPI_IS_ROOT_DEVICE(device->parent)) { | |
1120 | acpi_add_id(device, ACPI_BUS_HID); /* \_SB, LNXSYBUS */ | |
1121 | strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME); | |
1122 | strcpy(device->pnp.device_class, ACPI_BUS_CLASS); | |
1123 | } | |
54735266 | 1124 | |
1da177e4 LT |
1125 | break; |
1126 | case ACPI_BUS_TYPE_POWER: | |
57f3674f | 1127 | acpi_add_id(device, ACPI_POWER_HID); |
1da177e4 LT |
1128 | break; |
1129 | case ACPI_BUS_TYPE_PROCESSOR: | |
57f3674f | 1130 | acpi_add_id(device, ACPI_PROCESSOR_OBJECT_HID); |
1da177e4 | 1131 | break; |
1da177e4 | 1132 | case ACPI_BUS_TYPE_THERMAL: |
57f3674f | 1133 | acpi_add_id(device, ACPI_THERMAL_HID); |
1da177e4 LT |
1134 | break; |
1135 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
57f3674f | 1136 | acpi_add_id(device, ACPI_BUTTON_HID_POWERF); |
1da177e4 LT |
1137 | break; |
1138 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
57f3674f | 1139 | acpi_add_id(device, ACPI_BUTTON_HID_SLEEPF); |
1da177e4 LT |
1140 | break; |
1141 | } | |
1142 | ||
b1fbfb2a BH |
1143 | /* |
1144 | * We build acpi_devices for some objects that don't have _HID or _CID, | |
1145 | * e.g., PCI bridges and slots. Drivers can't bind to these objects, | |
1146 | * but we do use them indirectly by traversing the acpi_device tree. | |
1147 | * This generic ID isn't useful for driver binding, but it provides | |
1148 | * the useful property that "every acpi_device has an ID." | |
1149 | */ | |
57f3674f BH |
1150 | if (list_empty(&device->pnp.ids)) |
1151 | acpi_add_id(device, "device"); | |
1da177e4 LT |
1152 | } |
1153 | ||
bc3b0772 | 1154 | static int acpi_device_set_context(struct acpi_device *device) |
1da177e4 | 1155 | { |
bc3b0772 BH |
1156 | acpi_status status; |
1157 | ||
1da177e4 LT |
1158 | /* |
1159 | * Context | |
1160 | * ------- | |
1161 | * Attach this 'struct acpi_device' to the ACPI object. This makes | |
bc3b0772 BH |
1162 | * resolutions from handle->device very efficient. Fixed hardware |
1163 | * devices have no handles, so we skip them. | |
1da177e4 | 1164 | */ |
bc3b0772 BH |
1165 | if (!device->handle) |
1166 | return 0; | |
1da177e4 | 1167 | |
bc3b0772 BH |
1168 | status = acpi_attach_data(device->handle, |
1169 | acpi_bus_data_handler, device); | |
1170 | if (ACPI_SUCCESS(status)) | |
1171 | return 0; | |
1172 | ||
1173 | printk(KERN_ERR PREFIX "Error attaching device data\n"); | |
1174 | return -ENODEV; | |
1da177e4 LT |
1175 | } |
1176 | ||
4be44fcd | 1177 | static int acpi_bus_remove(struct acpi_device *dev, int rmdevice) |
1da177e4 | 1178 | { |
1da177e4 | 1179 | if (!dev) |
d550d98d | 1180 | return -EINVAL; |
1da177e4 | 1181 | |
96333578 | 1182 | dev->removal_type = ACPI_BUS_REMOVAL_EJECT; |
1890a97a | 1183 | device_release_driver(&dev->dev); |
1da177e4 LT |
1184 | |
1185 | if (!rmdevice) | |
d550d98d | 1186 | return 0; |
1da177e4 | 1187 | |
2786f6e3 RZ |
1188 | /* |
1189 | * unbind _ADR-Based Devices when hot removal | |
1190 | */ | |
1da177e4 LT |
1191 | if (dev->flags.bus_address) { |
1192 | if ((dev->parent) && (dev->parent->ops.unbind)) | |
1193 | dev->parent->ops.unbind(dev); | |
1194 | } | |
1da177e4 LT |
1195 | acpi_device_unregister(dev, ACPI_BUS_REMOVAL_EJECT); |
1196 | ||
d550d98d | 1197 | return 0; |
1da177e4 LT |
1198 | } |
1199 | ||
5c478f49 BH |
1200 | static int acpi_add_single_object(struct acpi_device **child, |
1201 | acpi_handle handle, int type, | |
778cbc1d | 1202 | unsigned long long sta, |
5c478f49 | 1203 | struct acpi_bus_ops *ops) |
1da177e4 | 1204 | { |
77c24888 BH |
1205 | int result; |
1206 | struct acpi_device *device; | |
29aaefa6 | 1207 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 1208 | |
36bcbec7 | 1209 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 1210 | if (!device) { |
6468463a | 1211 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 1212 | return -ENOMEM; |
1da177e4 | 1213 | } |
1da177e4 | 1214 | |
7f47fa6c | 1215 | INIT_LIST_HEAD(&device->pnp.ids); |
caaa6efb | 1216 | device->device_type = type; |
1da177e4 | 1217 | device->handle = handle; |
5c478f49 | 1218 | device->parent = acpi_bus_get_parent(handle); |
c4168bff | 1219 | device->bus_ops = *ops; /* workround for not call .start */ |
778cbc1d | 1220 | STRUCT_TO_INT(device->status) = sta; |
c4168bff | 1221 | |
c7bcb4e9 | 1222 | acpi_device_get_busid(device); |
1da177e4 LT |
1223 | |
1224 | /* | |
1225 | * Flags | |
1226 | * ----- | |
778cbc1d BH |
1227 | * Note that we only look for object handles -- cannot evaluate objects |
1228 | * until we know the device is present and properly initialized. | |
1da177e4 LT |
1229 | */ |
1230 | result = acpi_bus_get_flags(device); | |
1231 | if (result) | |
1232 | goto end; | |
1233 | ||
1da177e4 LT |
1234 | /* |
1235 | * Initialize Device | |
1236 | * ----------------- | |
1237 | * TBD: Synch with Core's enumeration/initialization process. | |
1238 | */ | |
c7bcb4e9 | 1239 | acpi_device_set_id(device); |
1da177e4 LT |
1240 | |
1241 | /* | |
1242 | * Power Management | |
1243 | * ---------------- | |
1244 | */ | |
1245 | if (device->flags.power_manageable) { | |
1246 | result = acpi_bus_get_power_flags(device); | |
1247 | if (result) | |
1248 | goto end; | |
1249 | } | |
1250 | ||
4be44fcd | 1251 | /* |
1da177e4 LT |
1252 | * Wakeup device management |
1253 | *----------------------- | |
1254 | */ | |
1255 | if (device->flags.wake_capable) { | |
1256 | result = acpi_bus_get_wakeup_device_flags(device); | |
1257 | if (result) | |
1258 | goto end; | |
1259 | } | |
1260 | ||
1261 | /* | |
1262 | * Performance Management | |
1263 | * ---------------------- | |
1264 | */ | |
1265 | if (device->flags.performance_manageable) { | |
1266 | result = acpi_bus_get_perf_flags(device); | |
1267 | if (result) | |
1268 | goto end; | |
1269 | } | |
1270 | ||
bc3b0772 | 1271 | if ((result = acpi_device_set_context(device))) |
f61f9258 | 1272 | goto end; |
1da177e4 | 1273 | |
66b7ed40 | 1274 | result = acpi_device_register(device); |
1da177e4 LT |
1275 | |
1276 | /* | |
2786f6e3 | 1277 | * Bind _ADR-Based Devices when hot add |
1da177e4 LT |
1278 | */ |
1279 | if (device->flags.bus_address) { | |
1280 | if (device->parent && device->parent->ops.bind) | |
1281 | device->parent->ops.bind(device); | |
1282 | } | |
1283 | ||
0c526d96 | 1284 | end: |
29aaefa6 BH |
1285 | if (!result) { |
1286 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1287 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
1288 | "Adding %s [%s] parent %s\n", dev_name(&device->dev), | |
1289 | (char *) buffer.pointer, | |
1290 | device->parent ? dev_name(&device->parent->dev) : | |
1291 | "(null)")); | |
1292 | kfree(buffer.pointer); | |
1da177e4 | 1293 | *child = device; |
29aaefa6 | 1294 | } else |
718fb0de | 1295 | acpi_device_release(&device->dev); |
1da177e4 | 1296 | |
d550d98d | 1297 | return result; |
1da177e4 | 1298 | } |
1da177e4 | 1299 | |
778cbc1d BH |
1300 | #define ACPI_STA_DEFAULT (ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | \ |
1301 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING) | |
1302 | ||
1303 | static int acpi_bus_type_and_status(acpi_handle handle, int *type, | |
1304 | unsigned long long *sta) | |
1da177e4 | 1305 | { |
778cbc1d BH |
1306 | acpi_status status; |
1307 | acpi_object_type acpi_type; | |
1da177e4 | 1308 | |
778cbc1d | 1309 | status = acpi_get_type(handle, &acpi_type); |
51a85faf | 1310 | if (ACPI_FAILURE(status)) |
778cbc1d | 1311 | return -ENODEV; |
4be44fcd | 1312 | |
778cbc1d | 1313 | switch (acpi_type) { |
51a85faf BH |
1314 | case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */ |
1315 | case ACPI_TYPE_DEVICE: | |
778cbc1d BH |
1316 | *type = ACPI_BUS_TYPE_DEVICE; |
1317 | status = acpi_bus_get_status_handle(handle, sta); | |
1318 | if (ACPI_FAILURE(status)) | |
1319 | return -ENODEV; | |
51a85faf BH |
1320 | break; |
1321 | case ACPI_TYPE_PROCESSOR: | |
778cbc1d BH |
1322 | *type = ACPI_BUS_TYPE_PROCESSOR; |
1323 | status = acpi_bus_get_status_handle(handle, sta); | |
1324 | if (ACPI_FAILURE(status)) | |
1325 | return -ENODEV; | |
51a85faf BH |
1326 | break; |
1327 | case ACPI_TYPE_THERMAL: | |
778cbc1d BH |
1328 | *type = ACPI_BUS_TYPE_THERMAL; |
1329 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1330 | break; |
1331 | case ACPI_TYPE_POWER: | |
778cbc1d BH |
1332 | *type = ACPI_BUS_TYPE_POWER; |
1333 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1334 | break; |
1335 | default: | |
778cbc1d | 1336 | return -ENODEV; |
51a85faf | 1337 | } |
1da177e4 | 1338 | |
778cbc1d BH |
1339 | return 0; |
1340 | } | |
1341 | ||
1342 | static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl, | |
1343 | void *context, void **return_value) | |
1344 | { | |
1345 | struct acpi_bus_ops *ops = context; | |
778cbc1d BH |
1346 | int type; |
1347 | unsigned long long sta; | |
e3b87f8a BH |
1348 | struct acpi_device *device; |
1349 | acpi_status status; | |
778cbc1d BH |
1350 | int result; |
1351 | ||
1352 | result = acpi_bus_type_and_status(handle, &type, &sta); | |
1353 | if (result) | |
1354 | return AE_OK; | |
1355 | ||
1356 | if (!(sta & ACPI_STA_DEVICE_PRESENT) && | |
1357 | !(sta & ACPI_STA_DEVICE_FUNCTIONING)) | |
1358 | return AE_CTRL_DEPTH; | |
1359 | ||
e3b87f8a BH |
1360 | /* |
1361 | * We may already have an acpi_device from a previous enumeration. If | |
1362 | * so, we needn't add it again, but we may still have to start it. | |
1363 | */ | |
1364 | device = NULL; | |
1365 | acpi_bus_get_device(handle, &device); | |
1366 | if (ops->acpi_op_add && !device) | |
1367 | acpi_add_single_object(&device, handle, type, sta, ops); | |
1da177e4 | 1368 | |
e3b87f8a | 1369 | if (!device) |
51a85faf | 1370 | return AE_CTRL_DEPTH; |
1da177e4 | 1371 | |
51a85faf BH |
1372 | if (ops->acpi_op_start && !(ops->acpi_op_add)) { |
1373 | status = acpi_start_single_object(device); | |
1da177e4 | 1374 | if (ACPI_FAILURE(status)) |
51a85faf BH |
1375 | return AE_CTRL_DEPTH; |
1376 | } | |
1da177e4 | 1377 | |
51a85faf BH |
1378 | if (!*return_value) |
1379 | *return_value = device; | |
1380 | return AE_OK; | |
1381 | } | |
3fb02738 | 1382 | |
51a85faf BH |
1383 | static int acpi_bus_scan(acpi_handle handle, struct acpi_bus_ops *ops, |
1384 | struct acpi_device **child) | |
1385 | { | |
1386 | acpi_status status; | |
51a85faf | 1387 | void *device = NULL; |
3fb02738 | 1388 | |
51a85faf BH |
1389 | status = acpi_bus_check_add(handle, 0, ops, &device); |
1390 | if (ACPI_SUCCESS(status)) | |
1391 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
2263576c | 1392 | acpi_bus_check_add, NULL, ops, &device); |
1da177e4 | 1393 | |
51a85faf BH |
1394 | if (child) |
1395 | *child = device; | |
7779688f TR |
1396 | |
1397 | if (device) | |
1398 | return 0; | |
1399 | else | |
1400 | return -ENODEV; | |
1da177e4 | 1401 | } |
1da177e4 | 1402 | |
7779688f TR |
1403 | /* |
1404 | * acpi_bus_add and acpi_bus_start | |
1405 | * | |
1406 | * scan a given ACPI tree and (probably recently hot-plugged) | |
1407 | * create and add or starts found devices. | |
1408 | * | |
1409 | * If no devices were found -ENODEV is returned which does not | |
1410 | * mean that this is a real error, there just have been no suitable | |
1411 | * ACPI objects in the table trunk from which the kernel could create | |
1412 | * a device and add/start an appropriate driver. | |
1413 | */ | |
1414 | ||
3fb02738 | 1415 | int |
4be44fcd LB |
1416 | acpi_bus_add(struct acpi_device **child, |
1417 | struct acpi_device *parent, acpi_handle handle, int type) | |
3fb02738 | 1418 | { |
3fb02738 RS |
1419 | struct acpi_bus_ops ops; |
1420 | ||
c4168bff LS |
1421 | memset(&ops, 0, sizeof(ops)); |
1422 | ops.acpi_op_add = 1; | |
3fb02738 | 1423 | |
7779688f | 1424 | return acpi_bus_scan(handle, &ops, child); |
3fb02738 RS |
1425 | } |
1426 | EXPORT_SYMBOL(acpi_bus_add); | |
1427 | ||
4be44fcd | 1428 | int acpi_bus_start(struct acpi_device *device) |
3fb02738 | 1429 | { |
3fb02738 RS |
1430 | struct acpi_bus_ops ops; |
1431 | ||
d2f6650a TR |
1432 | if (!device) |
1433 | return -EINVAL; | |
1434 | ||
8e029bf0 BH |
1435 | memset(&ops, 0, sizeof(ops)); |
1436 | ops.acpi_op_start = 1; | |
3fb02738 | 1437 | |
7779688f | 1438 | return acpi_bus_scan(device->handle, &ops, NULL); |
3fb02738 RS |
1439 | } |
1440 | EXPORT_SYMBOL(acpi_bus_start); | |
1da177e4 | 1441 | |
ceaba663 | 1442 | int acpi_bus_trim(struct acpi_device *start, int rmdevice) |
1da177e4 | 1443 | { |
4be44fcd LB |
1444 | acpi_status status; |
1445 | struct acpi_device *parent, *child; | |
1446 | acpi_handle phandle, chandle; | |
1447 | acpi_object_type type; | |
1448 | u32 level = 1; | |
1449 | int err = 0; | |
1450 | ||
1451 | parent = start; | |
1da177e4 LT |
1452 | phandle = start->handle; |
1453 | child = chandle = NULL; | |
1454 | ||
1455 | while ((level > 0) && parent && (!err)) { | |
1456 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, | |
4be44fcd | 1457 | chandle, &chandle); |
1da177e4 LT |
1458 | |
1459 | /* | |
1460 | * If this scope is exhausted then move our way back up. | |
1461 | */ | |
1462 | if (ACPI_FAILURE(status)) { | |
1463 | level--; | |
1464 | chandle = phandle; | |
1465 | acpi_get_parent(phandle, &phandle); | |
1466 | child = parent; | |
1467 | parent = parent->parent; | |
1468 | ||
1469 | if (level == 0) | |
1470 | err = acpi_bus_remove(child, rmdevice); | |
1471 | else | |
1472 | err = acpi_bus_remove(child, 1); | |
1473 | ||
1474 | continue; | |
1475 | } | |
1476 | ||
1477 | status = acpi_get_type(chandle, &type); | |
1478 | if (ACPI_FAILURE(status)) { | |
1479 | continue; | |
1480 | } | |
1481 | /* | |
1482 | * If there is a device corresponding to chandle then | |
1483 | * parse it (depth-first). | |
1484 | */ | |
1485 | if (acpi_bus_get_device(chandle, &child) == 0) { | |
1486 | level++; | |
1487 | phandle = chandle; | |
1488 | chandle = NULL; | |
1489 | parent = child; | |
1490 | } | |
1491 | continue; | |
1492 | } | |
1493 | return err; | |
1494 | } | |
ceaba663 KA |
1495 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
1496 | ||
e8b945c9 | 1497 | static int acpi_bus_scan_fixed(void) |
1da177e4 | 1498 | { |
4be44fcd LB |
1499 | int result = 0; |
1500 | struct acpi_device *device = NULL; | |
c4168bff | 1501 | struct acpi_bus_ops ops; |
1da177e4 | 1502 | |
c4168bff LS |
1503 | memset(&ops, 0, sizeof(ops)); |
1504 | ops.acpi_op_add = 1; | |
1505 | ops.acpi_op_start = 1; | |
1506 | ||
1da177e4 LT |
1507 | /* |
1508 | * Enumerate all fixed-feature devices. | |
1509 | */ | |
cee324b1 | 1510 | if ((acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON) == 0) { |
5c478f49 | 1511 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1512 | ACPI_BUS_TYPE_POWER_BUTTON, |
778cbc1d | 1513 | ACPI_STA_DEFAULT, |
c4168bff | 1514 | &ops); |
3fb02738 | 1515 | } |
1da177e4 | 1516 | |
cee324b1 | 1517 | if ((acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON) == 0) { |
5c478f49 | 1518 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1519 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
778cbc1d | 1520 | ACPI_STA_DEFAULT, |
c4168bff | 1521 | &ops); |
3fb02738 | 1522 | } |
1da177e4 | 1523 | |
d550d98d | 1524 | return result; |
1da177e4 LT |
1525 | } |
1526 | ||
e747f274 | 1527 | int __init acpi_scan_init(void) |
1da177e4 LT |
1528 | { |
1529 | int result; | |
3fb02738 | 1530 | struct acpi_bus_ops ops; |
1da177e4 | 1531 | |
c4168bff LS |
1532 | memset(&ops, 0, sizeof(ops)); |
1533 | ops.acpi_op_add = 1; | |
1534 | ops.acpi_op_start = 1; | |
1da177e4 | 1535 | |
5b327265 PM |
1536 | result = bus_register(&acpi_bus_type); |
1537 | if (result) { | |
1538 | /* We don't want to quit even if we failed to add suspend/resume */ | |
1539 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
1540 | } | |
1541 | ||
1da177e4 LT |
1542 | /* |
1543 | * Enumerate devices in the ACPI namespace. | |
1544 | */ | |
51a85faf | 1545 | result = acpi_bus_scan(ACPI_ROOT_OBJECT, &ops, &acpi_root); |
c04209a7 | 1546 | |
c4168bff | 1547 | if (!result) |
adc08e20 | 1548 | result = acpi_bus_scan_fixed(); |
1da177e4 LT |
1549 | |
1550 | if (result) | |
1551 | acpi_device_unregister(acpi_root, ACPI_BUS_REMOVAL_NORMAL); | |
1552 | ||
d550d98d | 1553 | return result; |
1da177e4 | 1554 | } |