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> | |
9b6d97b6 | 7 | #include <linux/kernel.h> |
1da177e4 | 8 | #include <linux/acpi.h> |
74523c90 AK |
9 | #include <linux/signal.h> |
10 | #include <linux/kthread.h> | |
1da177e4 LT |
11 | |
12 | #include <acpi/acpi_drivers.h> | |
1da177e4 | 13 | |
e60cc7a6 BH |
14 | #include "internal.h" |
15 | ||
1da177e4 | 16 | #define _COMPONENT ACPI_BUS_COMPONENT |
f52fd66d | 17 | ACPI_MODULE_NAME("scan"); |
1da177e4 | 18 | #define STRUCT_TO_INT(s) (*((int*)&s)) |
4be44fcd | 19 | extern struct acpi_device *acpi_root; |
1da177e4 LT |
20 | |
21 | #define ACPI_BUS_CLASS "system_bus" | |
29b71a1c | 22 | #define ACPI_BUS_HID "LNXSYBUS" |
1da177e4 LT |
23 | #define ACPI_BUS_DEVICE_NAME "System Bus" |
24 | ||
859ac9a4 BH |
25 | #define ACPI_IS_ROOT_DEVICE(device) (!(device)->parent) |
26 | ||
1da177e4 | 27 | static LIST_HEAD(acpi_device_list); |
e49bd2dd | 28 | static LIST_HEAD(acpi_bus_id_list); |
9090589d | 29 | DEFINE_MUTEX(acpi_device_lock); |
1da177e4 LT |
30 | LIST_HEAD(acpi_wakeup_device_list); |
31 | ||
e49bd2dd | 32 | struct acpi_device_bus_id{ |
bb095854 | 33 | char bus_id[15]; |
e49bd2dd ZR |
34 | unsigned int instance_no; |
35 | struct list_head node; | |
1da177e4 | 36 | }; |
29b71a1c TR |
37 | |
38 | /* | |
39 | * Creates hid/cid(s) string needed for modalias and uevent | |
40 | * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: | |
41 | * char *modalias: "acpi:IBM0001:ACPI0001" | |
42 | */ | |
b3e572d2 AB |
43 | static int create_modalias(struct acpi_device *acpi_dev, char *modalias, |
44 | int size) | |
45 | { | |
29b71a1c | 46 | int len; |
5c9fcb5d | 47 | int count; |
7f47fa6c | 48 | struct acpi_hardware_id *id; |
29b71a1c | 49 | |
5c9fcb5d | 50 | len = snprintf(modalias, size, "acpi:"); |
29b71a1c TR |
51 | size -= len; |
52 | ||
7f47fa6c BH |
53 | list_for_each_entry(id, &acpi_dev->pnp.ids, list) { |
54 | count = snprintf(&modalias[len], size, "%s:", id->id); | |
5c9fcb5d ZR |
55 | if (count < 0 || count >= size) |
56 | return -EINVAL; | |
57 | len += count; | |
58 | size -= count; | |
59 | } | |
60 | ||
29b71a1c TR |
61 | modalias[len] = '\0'; |
62 | return len; | |
63 | } | |
64 | ||
65 | static ssize_t | |
66 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
67 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
68 | int len; | |
69 | ||
70 | /* Device has no HID and no CID or string is >1024 */ | |
71 | len = create_modalias(acpi_dev, buf, 1024); | |
72 | if (len <= 0) | |
73 | return 0; | |
74 | buf[len++] = '\n'; | |
75 | return len; | |
76 | } | |
77 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); | |
78 | ||
c8d72a5e | 79 | static void acpi_bus_hot_remove_device(void *context) |
1da177e4 | 80 | { |
26d46867 ZR |
81 | struct acpi_device *device; |
82 | acpi_handle handle = context; | |
1da177e4 LT |
83 | struct acpi_object_list arg_list; |
84 | union acpi_object arg; | |
85 | acpi_status status = AE_OK; | |
1da177e4 | 86 | |
26d46867 | 87 | if (acpi_bus_get_device(handle, &device)) |
c8d72a5e | 88 | return; |
26d46867 ZR |
89 | |
90 | if (!device) | |
c8d72a5e | 91 | return; |
26d46867 ZR |
92 | |
93 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
0794469d | 94 | "Hot-removing device %s...\n", dev_name(&device->dev))); |
26d46867 ZR |
95 | |
96 | if (acpi_bus_trim(device, 1)) { | |
55ac9a01 LM |
97 | printk(KERN_ERR PREFIX |
98 | "Removing device failed\n"); | |
c8d72a5e | 99 | return; |
26d46867 | 100 | } |
1da177e4 | 101 | |
26d46867 ZR |
102 | /* power off device */ |
103 | status = acpi_evaluate_object(handle, "_PS3", NULL, NULL); | |
104 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) | |
55ac9a01 LM |
105 | printk(KERN_WARNING PREFIX |
106 | "Power-off device failed\n"); | |
26d46867 ZR |
107 | |
108 | if (device->flags.lockable) { | |
1da177e4 LT |
109 | arg_list.count = 1; |
110 | arg_list.pointer = &arg; | |
111 | arg.type = ACPI_TYPE_INTEGER; | |
112 | arg.integer.value = 0; | |
113 | acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); | |
114 | } | |
1da177e4 | 115 | |
1da177e4 LT |
116 | arg_list.count = 1; |
117 | arg_list.pointer = &arg; | |
118 | arg.type = ACPI_TYPE_INTEGER; | |
119 | arg.integer.value = 1; | |
1da177e4 | 120 | |
1da177e4 LT |
121 | /* |
122 | * TBD: _EJD support. | |
123 | */ | |
1da177e4 | 124 | status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); |
26d46867 | 125 | if (ACPI_FAILURE(status)) |
c8d72a5e ZR |
126 | printk(KERN_WARNING PREFIX |
127 | "Eject device failed\n"); | |
1da177e4 | 128 | |
c8d72a5e | 129 | return; |
1da177e4 LT |
130 | } |
131 | ||
1da177e4 | 132 | static ssize_t |
f883d9db PM |
133 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
134 | const char *buf, size_t count) | |
1da177e4 | 135 | { |
4be44fcd | 136 | int ret = count; |
4be44fcd | 137 | acpi_status status; |
4be44fcd | 138 | acpi_object_type type = 0; |
f883d9db | 139 | struct acpi_device *acpi_device = to_acpi_device(d); |
1da177e4 | 140 | |
1da177e4 LT |
141 | if ((!count) || (buf[0] != '1')) { |
142 | return -EINVAL; | |
143 | } | |
1da177e4 | 144 | #ifndef FORCE_EJECT |
f883d9db | 145 | if (acpi_device->driver == NULL) { |
1da177e4 LT |
146 | ret = -ENODEV; |
147 | goto err; | |
148 | } | |
149 | #endif | |
f883d9db PM |
150 | status = acpi_get_type(acpi_device->handle, &type); |
151 | if (ACPI_FAILURE(status) || (!acpi_device->flags.ejectable)) { | |
1da177e4 LT |
152 | ret = -ENODEV; |
153 | goto err; | |
154 | } | |
1da177e4 | 155 | |
c8d72a5e | 156 | acpi_os_hotplug_execute(acpi_bus_hot_remove_device, acpi_device->handle); |
74523c90 | 157 | err: |
1da177e4 | 158 | return ret; |
1da177e4 LT |
159 | } |
160 | ||
f883d9db | 161 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
1da177e4 | 162 | |
e49bd2dd ZR |
163 | static ssize_t |
164 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
165 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1da177e4 | 166 | |
ea8d82fd | 167 | return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev)); |
1da177e4 | 168 | } |
e49bd2dd | 169 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
1da177e4 | 170 | |
e49bd2dd ZR |
171 | static ssize_t |
172 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
173 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
174 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
175 | int result; | |
1da177e4 | 176 | |
e49bd2dd | 177 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
0c526d96 | 178 | if (result) |
e49bd2dd | 179 | goto end; |
1da177e4 | 180 | |
e49bd2dd ZR |
181 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
182 | kfree(path.pointer); | |
0c526d96 | 183 | end: |
e49bd2dd | 184 | return result; |
1da177e4 | 185 | } |
e49bd2dd | 186 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
1da177e4 | 187 | |
e49bd2dd | 188 | static int acpi_device_setup_files(struct acpi_device *dev) |
1da177e4 | 189 | { |
f883d9db PM |
190 | acpi_status status; |
191 | acpi_handle temp; | |
e49bd2dd | 192 | int result = 0; |
1da177e4 LT |
193 | |
194 | /* | |
e49bd2dd | 195 | * Devices gotten from FADT don't have a "path" attribute |
1da177e4 | 196 | */ |
0c526d96 | 197 | if (dev->handle) { |
e49bd2dd | 198 | result = device_create_file(&dev->dev, &dev_attr_path); |
0c526d96 | 199 | if (result) |
e49bd2dd | 200 | goto end; |
1da177e4 LT |
201 | } |
202 | ||
1131b938 BH |
203 | result = device_create_file(&dev->dev, &dev_attr_hid); |
204 | if (result) | |
205 | goto end; | |
1da177e4 | 206 | |
1131b938 BH |
207 | result = device_create_file(&dev->dev, &dev_attr_modalias); |
208 | if (result) | |
209 | goto end; | |
29b71a1c | 210 | |
e49bd2dd ZR |
211 | /* |
212 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
213 | * hot-removal function from userland. | |
214 | */ | |
f883d9db PM |
215 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); |
216 | if (ACPI_SUCCESS(status)) | |
e49bd2dd | 217 | result = device_create_file(&dev->dev, &dev_attr_eject); |
0c526d96 | 218 | end: |
e49bd2dd | 219 | return result; |
1da177e4 LT |
220 | } |
221 | ||
f883d9db | 222 | static void acpi_device_remove_files(struct acpi_device *dev) |
1da177e4 | 223 | { |
f883d9db PM |
224 | acpi_status status; |
225 | acpi_handle temp; | |
1da177e4 | 226 | |
f883d9db PM |
227 | /* |
228 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
229 | * hot-removal function from userland. | |
230 | */ | |
231 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); | |
232 | if (ACPI_SUCCESS(status)) | |
233 | device_remove_file(&dev->dev, &dev_attr_eject); | |
1da177e4 | 234 | |
1131b938 BH |
235 | device_remove_file(&dev->dev, &dev_attr_modalias); |
236 | device_remove_file(&dev->dev, &dev_attr_hid); | |
0c526d96 | 237 | if (dev->handle) |
e49bd2dd | 238 | device_remove_file(&dev->dev, &dev_attr_path); |
1da177e4 | 239 | } |
1da177e4 | 240 | /* -------------------------------------------------------------------------- |
9e89dde2 | 241 | ACPI Bus operations |
1da177e4 | 242 | -------------------------------------------------------------------------- */ |
29b71a1c TR |
243 | |
244 | int acpi_match_device_ids(struct acpi_device *device, | |
245 | const struct acpi_device_id *ids) | |
246 | { | |
247 | const struct acpi_device_id *id; | |
7f47fa6c | 248 | struct acpi_hardware_id *hwid; |
29b71a1c | 249 | |
39a0ad87 ZY |
250 | /* |
251 | * If the device is not present, it is unnecessary to load device | |
252 | * driver for it. | |
253 | */ | |
254 | if (!device->status.present) | |
255 | return -ENODEV; | |
256 | ||
7f47fa6c BH |
257 | for (id = ids; id->id[0]; id++) |
258 | list_for_each_entry(hwid, &device->pnp.ids, list) | |
259 | if (!strcmp((char *) id->id, hwid->id)) | |
29b71a1c | 260 | return 0; |
29b71a1c TR |
261 | |
262 | return -ENOENT; | |
263 | } | |
264 | EXPORT_SYMBOL(acpi_match_device_ids); | |
265 | ||
7f47fa6c BH |
266 | static void acpi_free_ids(struct acpi_device *device) |
267 | { | |
268 | struct acpi_hardware_id *id, *tmp; | |
269 | ||
270 | list_for_each_entry_safe(id, tmp, &device->pnp.ids, list) { | |
271 | kfree(id->id); | |
272 | kfree(id); | |
273 | } | |
274 | } | |
275 | ||
1890a97a | 276 | static void acpi_device_release(struct device *dev) |
1da177e4 | 277 | { |
1890a97a | 278 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 279 | |
7f47fa6c | 280 | acpi_free_ids(acpi_dev); |
1890a97a | 281 | kfree(acpi_dev); |
1da177e4 LT |
282 | } |
283 | ||
5d9464a4 | 284 | static int acpi_device_suspend(struct device *dev, pm_message_t state) |
1da177e4 | 285 | { |
5d9464a4 PM |
286 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
287 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
1da177e4 | 288 | |
5d9464a4 PM |
289 | if (acpi_drv && acpi_drv->ops.suspend) |
290 | return acpi_drv->ops.suspend(acpi_dev, state); | |
1da177e4 LT |
291 | return 0; |
292 | } | |
1da177e4 | 293 | |
5d9464a4 | 294 | static int acpi_device_resume(struct device *dev) |
9e89dde2 | 295 | { |
5d9464a4 PM |
296 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
297 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
1da177e4 | 298 | |
5d9464a4 PM |
299 | if (acpi_drv && acpi_drv->ops.resume) |
300 | return acpi_drv->ops.resume(acpi_dev); | |
d550d98d | 301 | return 0; |
1da177e4 LT |
302 | } |
303 | ||
5d9464a4 | 304 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 305 | { |
5d9464a4 PM |
306 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
307 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
1da177e4 | 308 | |
29b71a1c | 309 | return !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
5d9464a4 | 310 | } |
1da177e4 | 311 | |
7eff2e7a | 312 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 | 313 | { |
5d9464a4 | 314 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
7eff2e7a | 315 | int len; |
5d9464a4 | 316 | |
7eff2e7a KS |
317 | if (add_uevent_var(env, "MODALIAS=")) |
318 | return -ENOMEM; | |
319 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], | |
320 | sizeof(env->buf) - env->buflen); | |
321 | if (len >= (sizeof(env->buf) - env->buflen)) | |
322 | return -ENOMEM; | |
323 | env->buflen += len; | |
9e89dde2 | 324 | return 0; |
1da177e4 LT |
325 | } |
326 | ||
46ec8598 BH |
327 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
328 | { | |
329 | struct acpi_device *device = data; | |
330 | ||
331 | device->driver->ops.notify(device, event); | |
332 | } | |
333 | ||
334 | static acpi_status acpi_device_notify_fixed(void *data) | |
335 | { | |
336 | struct acpi_device *device = data; | |
337 | ||
53de5356 BH |
338 | /* Fixed hardware devices have no handles */ |
339 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); | |
46ec8598 BH |
340 | return AE_OK; |
341 | } | |
342 | ||
343 | static int acpi_device_install_notify_handler(struct acpi_device *device) | |
344 | { | |
345 | acpi_status status; | |
46ec8598 | 346 | |
ccba2a36 | 347 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
348 | status = |
349 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
350 | acpi_device_notify_fixed, | |
351 | device); | |
ccba2a36 | 352 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
353 | status = |
354 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
355 | acpi_device_notify_fixed, | |
356 | device); | |
357 | else | |
358 | status = acpi_install_notify_handler(device->handle, | |
359 | ACPI_DEVICE_NOTIFY, | |
360 | acpi_device_notify, | |
361 | device); | |
362 | ||
363 | if (ACPI_FAILURE(status)) | |
364 | return -EINVAL; | |
365 | return 0; | |
366 | } | |
367 | ||
368 | static void acpi_device_remove_notify_handler(struct acpi_device *device) | |
369 | { | |
ccba2a36 | 370 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
371 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, |
372 | acpi_device_notify_fixed); | |
ccba2a36 | 373 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
374 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, |
375 | acpi_device_notify_fixed); | |
376 | else | |
377 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, | |
378 | acpi_device_notify); | |
379 | } | |
380 | ||
5d9464a4 PM |
381 | static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *); |
382 | static int acpi_start_single_object(struct acpi_device *); | |
383 | static int acpi_device_probe(struct device * dev) | |
1da177e4 | 384 | { |
5d9464a4 PM |
385 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
386 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
387 | int ret; | |
388 | ||
389 | ret = acpi_bus_driver_init(acpi_dev, acpi_drv); | |
390 | if (!ret) { | |
c4168bff LS |
391 | if (acpi_dev->bus_ops.acpi_op_start) |
392 | acpi_start_single_object(acpi_dev); | |
46ec8598 BH |
393 | |
394 | if (acpi_drv->ops.notify) { | |
395 | ret = acpi_device_install_notify_handler(acpi_dev); | |
396 | if (ret) { | |
46ec8598 BH |
397 | if (acpi_drv->ops.remove) |
398 | acpi_drv->ops.remove(acpi_dev, | |
399 | acpi_dev->removal_type); | |
400 | return ret; | |
401 | } | |
402 | } | |
403 | ||
5d9464a4 PM |
404 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
405 | "Found driver [%s] for device [%s]\n", | |
406 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
407 | get_device(dev); | |
408 | } | |
409 | return ret; | |
410 | } | |
1da177e4 | 411 | |
5d9464a4 PM |
412 | static int acpi_device_remove(struct device * dev) |
413 | { | |
414 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
415 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
416 | ||
417 | if (acpi_drv) { | |
46ec8598 BH |
418 | if (acpi_drv->ops.notify) |
419 | acpi_device_remove_notify_handler(acpi_dev); | |
5d9464a4 | 420 | if (acpi_drv->ops.remove) |
96333578 | 421 | acpi_drv->ops.remove(acpi_dev, acpi_dev->removal_type); |
1da177e4 | 422 | } |
5d9464a4 | 423 | acpi_dev->driver = NULL; |
db89b4f0 | 424 | acpi_dev->driver_data = NULL; |
1da177e4 | 425 | |
5d9464a4 | 426 | put_device(dev); |
9e89dde2 ZR |
427 | return 0; |
428 | } | |
1da177e4 | 429 | |
55955aad | 430 | struct bus_type acpi_bus_type = { |
9e89dde2 ZR |
431 | .name = "acpi", |
432 | .suspend = acpi_device_suspend, | |
433 | .resume = acpi_device_resume, | |
5d9464a4 PM |
434 | .match = acpi_bus_match, |
435 | .probe = acpi_device_probe, | |
436 | .remove = acpi_device_remove, | |
437 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
438 | }; |
439 | ||
66b7ed40 | 440 | static int acpi_device_register(struct acpi_device *device) |
1da177e4 | 441 | { |
4be44fcd | 442 | int result; |
e49bd2dd ZR |
443 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
444 | int found = 0; | |
66b7ed40 | 445 | |
9e89dde2 ZR |
446 | /* |
447 | * Linkage | |
448 | * ------- | |
449 | * Link this device to its parent and siblings. | |
450 | */ | |
451 | INIT_LIST_HEAD(&device->children); | |
452 | INIT_LIST_HEAD(&device->node); | |
9e89dde2 | 453 | INIT_LIST_HEAD(&device->wakeup_list); |
1da177e4 | 454 | |
e49bd2dd ZR |
455 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
456 | if (!new_bus_id) { | |
457 | printk(KERN_ERR PREFIX "Memory allocation error\n"); | |
458 | return -ENOMEM; | |
1da177e4 | 459 | } |
e49bd2dd | 460 | |
9090589d | 461 | mutex_lock(&acpi_device_lock); |
e49bd2dd ZR |
462 | /* |
463 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
464 | * If failed, create one and link it into acpi_bus_id_list | |
465 | */ | |
466 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
1131b938 BH |
467 | if (!strcmp(acpi_device_bus_id->bus_id, |
468 | acpi_device_hid(device))) { | |
469 | acpi_device_bus_id->instance_no++; | |
e49bd2dd ZR |
470 | found = 1; |
471 | kfree(new_bus_id); | |
472 | break; | |
473 | } | |
1da177e4 | 474 | } |
0c526d96 | 475 | if (!found) { |
e49bd2dd | 476 | acpi_device_bus_id = new_bus_id; |
1131b938 | 477 | strcpy(acpi_device_bus_id->bus_id, acpi_device_hid(device)); |
e49bd2dd ZR |
478 | acpi_device_bus_id->instance_no = 0; |
479 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 480 | } |
0794469d | 481 | dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 482 | |
33b57150 | 483 | if (device->parent) |
9e89dde2 | 484 | list_add_tail(&device->node, &device->parent->children); |
33b57150 | 485 | |
9e89dde2 ZR |
486 | if (device->wakeup.flags.valid) |
487 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
9090589d | 488 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 489 | |
1890a97a | 490 | if (device->parent) |
66b7ed40 | 491 | device->dev.parent = &device->parent->dev; |
1890a97a | 492 | device->dev.bus = &acpi_bus_type; |
1890a97a | 493 | device->dev.release = &acpi_device_release; |
8b12b922 | 494 | result = device_register(&device->dev); |
0c526d96 | 495 | if (result) { |
8b12b922 | 496 | dev_err(&device->dev, "Error registering device\n"); |
e49bd2dd | 497 | goto end; |
1da177e4 | 498 | } |
1da177e4 | 499 | |
e49bd2dd | 500 | result = acpi_device_setup_files(device); |
0c526d96 | 501 | if (result) |
0794469d KS |
502 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
503 | dev_name(&device->dev)); | |
1da177e4 | 504 | |
96333578 | 505 | device->removal_type = ACPI_BUS_REMOVAL_NORMAL; |
1da177e4 | 506 | return 0; |
0c526d96 | 507 | end: |
9090589d | 508 | mutex_lock(&acpi_device_lock); |
33b57150 | 509 | if (device->parent) |
e49bd2dd | 510 | list_del(&device->node); |
e49bd2dd | 511 | list_del(&device->wakeup_list); |
9090589d | 512 | mutex_unlock(&acpi_device_lock); |
e49bd2dd | 513 | return result; |
1da177e4 LT |
514 | } |
515 | ||
9e89dde2 ZR |
516 | static void acpi_device_unregister(struct acpi_device *device, int type) |
517 | { | |
9090589d | 518 | mutex_lock(&acpi_device_lock); |
33b57150 | 519 | if (device->parent) |
9e89dde2 | 520 | list_del(&device->node); |
1da177e4 | 521 | |
9e89dde2 | 522 | list_del(&device->wakeup_list); |
9090589d | 523 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 524 | |
9e89dde2 | 525 | acpi_detach_data(device->handle, acpi_bus_data_handler); |
1890a97a | 526 | |
f883d9db | 527 | acpi_device_remove_files(device); |
1890a97a | 528 | device_unregister(&device->dev); |
1da177e4 LT |
529 | } |
530 | ||
9e89dde2 ZR |
531 | /* -------------------------------------------------------------------------- |
532 | Driver Management | |
533 | -------------------------------------------------------------------------- */ | |
1da177e4 | 534 | /** |
d758a8fa RD |
535 | * acpi_bus_driver_init - add a device to a driver |
536 | * @device: the device to add and initialize | |
537 | * @driver: driver for the device | |
538 | * | |
0c526d96 | 539 | * Used to initialize a device via its device driver. Called whenever a |
1890a97a | 540 | * driver is bound to a device. Invokes the driver's add() ops. |
1da177e4 LT |
541 | */ |
542 | static int | |
4be44fcd | 543 | acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) |
1da177e4 | 544 | { |
4be44fcd | 545 | int result = 0; |
1da177e4 | 546 | |
1da177e4 | 547 | if (!device || !driver) |
d550d98d | 548 | return -EINVAL; |
1da177e4 LT |
549 | |
550 | if (!driver->ops.add) | |
d550d98d | 551 | return -ENOSYS; |
1da177e4 LT |
552 | |
553 | result = driver->ops.add(device); | |
554 | if (result) { | |
555 | device->driver = NULL; | |
db89b4f0 | 556 | device->driver_data = NULL; |
d550d98d | 557 | return result; |
1da177e4 LT |
558 | } |
559 | ||
560 | device->driver = driver; | |
561 | ||
562 | /* | |
563 | * TBD - Configuration Management: Assign resources to device based | |
564 | * upon possible configuration and currently allocated resources. | |
565 | */ | |
566 | ||
4be44fcd LB |
567 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
568 | "Driver successfully bound to device\n")); | |
d550d98d | 569 | return 0; |
3fb02738 RS |
570 | } |
571 | ||
8713cbef | 572 | static int acpi_start_single_object(struct acpi_device *device) |
3fb02738 RS |
573 | { |
574 | int result = 0; | |
575 | struct acpi_driver *driver; | |
576 | ||
3fb02738 RS |
577 | |
578 | if (!(driver = device->driver)) | |
d550d98d | 579 | return 0; |
3fb02738 | 580 | |
1da177e4 LT |
581 | if (driver->ops.start) { |
582 | result = driver->ops.start(device); | |
583 | if (result && driver->ops.remove) | |
584 | driver->ops.remove(device, ACPI_BUS_REMOVAL_NORMAL); | |
1da177e4 LT |
585 | } |
586 | ||
d550d98d | 587 | return result; |
1da177e4 LT |
588 | } |
589 | ||
9e89dde2 ZR |
590 | /** |
591 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
592 | * @driver: driver being registered | |
593 | * | |
594 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
595 | * devices that match the driver's criteria and binds. Returns zero for | |
596 | * success or a negative error status for failure. | |
597 | */ | |
598 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
1da177e4 | 599 | { |
1890a97a | 600 | int ret; |
1da177e4 | 601 | |
9e89dde2 ZR |
602 | if (acpi_disabled) |
603 | return -ENODEV; | |
1890a97a PM |
604 | driver->drv.name = driver->name; |
605 | driver->drv.bus = &acpi_bus_type; | |
606 | driver->drv.owner = driver->owner; | |
1da177e4 | 607 | |
1890a97a PM |
608 | ret = driver_register(&driver->drv); |
609 | return ret; | |
9e89dde2 | 610 | } |
1da177e4 | 611 | |
9e89dde2 ZR |
612 | EXPORT_SYMBOL(acpi_bus_register_driver); |
613 | ||
614 | /** | |
615 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus | |
616 | * @driver: driver to unregister | |
617 | * | |
618 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
619 | * devices that match the driver's criteria and unbinds. | |
620 | */ | |
621 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
622 | { | |
1890a97a | 623 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
624 | } |
625 | ||
626 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
627 | ||
9e89dde2 ZR |
628 | /* -------------------------------------------------------------------------- |
629 | Device Enumeration | |
630 | -------------------------------------------------------------------------- */ | |
5c478f49 BH |
631 | static struct acpi_device *acpi_bus_get_parent(acpi_handle handle) |
632 | { | |
633 | acpi_status status; | |
634 | int ret; | |
635 | struct acpi_device *device; | |
636 | ||
637 | /* | |
638 | * Fixed hardware devices do not appear in the namespace and do not | |
639 | * have handles, but we fabricate acpi_devices for them, so we have | |
640 | * to deal with them specially. | |
641 | */ | |
642 | if (handle == NULL) | |
643 | return acpi_root; | |
644 | ||
645 | do { | |
646 | status = acpi_get_parent(handle, &handle); | |
647 | if (status == AE_NULL_ENTRY) | |
648 | return NULL; | |
649 | if (ACPI_FAILURE(status)) | |
650 | return acpi_root; | |
651 | ||
652 | ret = acpi_bus_get_device(handle, &device); | |
653 | if (ret == 0) | |
654 | return device; | |
655 | } while (1); | |
656 | } | |
657 | ||
9e89dde2 ZR |
658 | acpi_status |
659 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
660 | { | |
661 | acpi_status status; | |
662 | acpi_handle tmp; | |
663 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
664 | union acpi_object *obj; | |
665 | ||
666 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
667 | if (ACPI_FAILURE(status)) | |
668 | return status; | |
669 | ||
670 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
671 | if (ACPI_SUCCESS(status)) { | |
672 | obj = buffer.pointer; | |
3b5fee59 HM |
673 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
674 | ejd); | |
9e89dde2 ZR |
675 | kfree(buffer.pointer); |
676 | } | |
677 | return status; | |
678 | } | |
679 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
680 | ||
8e4319c4 | 681 | void acpi_bus_data_handler(acpi_handle handle, void *context) |
9e89dde2 ZR |
682 | { |
683 | ||
684 | /* TBD */ | |
685 | ||
686 | return; | |
687 | } | |
688 | ||
9e89dde2 ZR |
689 | static int acpi_bus_get_perf_flags(struct acpi_device *device) |
690 | { | |
691 | device->performance.state = ACPI_STATE_UNKNOWN; | |
692 | return 0; | |
693 | } | |
694 | ||
695 | static acpi_status | |
696 | acpi_bus_extract_wakeup_device_power_package(struct acpi_device *device, | |
697 | union acpi_object *package) | |
698 | { | |
699 | int i = 0; | |
700 | union acpi_object *element = NULL; | |
701 | ||
702 | if (!device || !package || (package->package.count < 2)) | |
703 | return AE_BAD_PARAMETER; | |
704 | ||
705 | element = &(package->package.elements[0]); | |
706 | if (!element) | |
707 | return AE_BAD_PARAMETER; | |
708 | if (element->type == ACPI_TYPE_PACKAGE) { | |
709 | if ((element->package.count < 2) || | |
710 | (element->package.elements[0].type != | |
711 | ACPI_TYPE_LOCAL_REFERENCE) | |
712 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) | |
713 | return AE_BAD_DATA; | |
714 | device->wakeup.gpe_device = | |
715 | element->package.elements[0].reference.handle; | |
716 | device->wakeup.gpe_number = | |
717 | (u32) element->package.elements[1].integer.value; | |
718 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
719 | device->wakeup.gpe_number = element->integer.value; | |
720 | } else | |
721 | return AE_BAD_DATA; | |
722 | ||
723 | element = &(package->package.elements[1]); | |
724 | if (element->type != ACPI_TYPE_INTEGER) { | |
725 | return AE_BAD_DATA; | |
726 | } | |
727 | device->wakeup.sleep_state = element->integer.value; | |
728 | ||
729 | if ((package->package.count - 2) > ACPI_MAX_HANDLES) { | |
730 | return AE_NO_MEMORY; | |
731 | } | |
732 | device->wakeup.resources.count = package->package.count - 2; | |
733 | for (i = 0; i < device->wakeup.resources.count; i++) { | |
734 | element = &(package->package.elements[i + 2]); | |
cd0b2248 | 735 | if (element->type != ACPI_TYPE_LOCAL_REFERENCE) |
9e89dde2 | 736 | return AE_BAD_DATA; |
9e89dde2 ZR |
737 | |
738 | device->wakeup.resources.handles[i] = element->reference.handle; | |
1da177e4 | 739 | } |
9e89dde2 ZR |
740 | |
741 | return AE_OK; | |
1da177e4 LT |
742 | } |
743 | ||
9e89dde2 | 744 | static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
1da177e4 | 745 | { |
9e89dde2 ZR |
746 | acpi_status status = 0; |
747 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
748 | union acpi_object *package = NULL; | |
77e76609 | 749 | int psw_error; |
1da177e4 | 750 | |
29b71a1c TR |
751 | struct acpi_device_id button_device_ids[] = { |
752 | {"PNP0C0D", 0}, | |
753 | {"PNP0C0C", 0}, | |
754 | {"PNP0C0E", 0}, | |
755 | {"", 0}, | |
756 | }; | |
757 | ||
9e89dde2 ZR |
758 | /* _PRW */ |
759 | status = acpi_evaluate_object(device->handle, "_PRW", NULL, &buffer); | |
760 | if (ACPI_FAILURE(status)) { | |
761 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
762 | goto end; | |
1da177e4 | 763 | } |
1da177e4 | 764 | |
9e89dde2 ZR |
765 | package = (union acpi_object *)buffer.pointer; |
766 | status = acpi_bus_extract_wakeup_device_power_package(device, package); | |
767 | if (ACPI_FAILURE(status)) { | |
768 | ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package")); | |
769 | goto end; | |
770 | } | |
1da177e4 | 771 | |
9e89dde2 | 772 | kfree(buffer.pointer); |
1da177e4 | 773 | |
9e89dde2 | 774 | device->wakeup.flags.valid = 1; |
9b83ccd2 | 775 | device->wakeup.prepare_count = 0; |
729b2bdb ZY |
776 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
777 | * system for the ACPI device with the _PRW object. | |
778 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. | |
779 | * So it is necessary to call _DSW object first. Only when it is not | |
780 | * present will the _PSW object used. | |
781 | */ | |
77e76609 RW |
782 | psw_error = acpi_device_sleep_wake(device, 0, 0, 0); |
783 | if (psw_error) | |
784 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
785 | "error in _DSW or _PSW evaluation\n")); | |
786 | ||
9e89dde2 | 787 | /* Power button, Lid switch always enable wakeup */ |
29b71a1c | 788 | if (!acpi_match_device_ids(device, button_device_ids)) |
9e89dde2 | 789 | device->wakeup.flags.run_wake = 1; |
1da177e4 | 790 | |
0c526d96 | 791 | end: |
9e89dde2 ZR |
792 | if (ACPI_FAILURE(status)) |
793 | device->flags.wake_capable = 0; | |
d550d98d | 794 | return 0; |
1da177e4 | 795 | } |
1da177e4 | 796 | |
9e89dde2 | 797 | static int acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 798 | { |
9e89dde2 ZR |
799 | acpi_status status = 0; |
800 | acpi_handle handle = NULL; | |
801 | u32 i = 0; | |
1a365616 | 802 | |
4be44fcd | 803 | |
9e89dde2 ZR |
804 | /* |
805 | * Power Management Flags | |
806 | */ | |
807 | status = acpi_get_handle(device->handle, "_PSC", &handle); | |
808 | if (ACPI_SUCCESS(status)) | |
809 | device->power.flags.explicit_get = 1; | |
810 | status = acpi_get_handle(device->handle, "_IRC", &handle); | |
811 | if (ACPI_SUCCESS(status)) | |
812 | device->power.flags.inrush_current = 1; | |
1da177e4 | 813 | |
9e89dde2 ZR |
814 | /* |
815 | * Enumerate supported power management states | |
816 | */ | |
817 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3; i++) { | |
818 | struct acpi_device_power_state *ps = &device->power.states[i]; | |
819 | char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' }; | |
1da177e4 | 820 | |
9e89dde2 ZR |
821 | /* Evaluate "_PRx" to se if power resources are referenced */ |
822 | acpi_evaluate_reference(device->handle, object_name, NULL, | |
823 | &ps->resources); | |
824 | if (ps->resources.count) { | |
825 | device->power.flags.power_resources = 1; | |
826 | ps->flags.valid = 1; | |
1da177e4 | 827 | } |
1da177e4 | 828 | |
9e89dde2 ZR |
829 | /* Evaluate "_PSx" to see if we can do explicit sets */ |
830 | object_name[2] = 'S'; | |
831 | status = acpi_get_handle(device->handle, object_name, &handle); | |
832 | if (ACPI_SUCCESS(status)) { | |
833 | ps->flags.explicit_set = 1; | |
834 | ps->flags.valid = 1; | |
1da177e4 | 835 | } |
1da177e4 | 836 | |
9e89dde2 ZR |
837 | /* State is valid if we have some power control */ |
838 | if (ps->resources.count || ps->flags.explicit_set) | |
839 | ps->flags.valid = 1; | |
1da177e4 | 840 | |
9e89dde2 ZR |
841 | ps->power = -1; /* Unknown - driver assigned */ |
842 | ps->latency = -1; /* Unknown - driver assigned */ | |
843 | } | |
1da177e4 | 844 | |
9e89dde2 ZR |
845 | /* Set defaults for D0 and D3 states (always valid) */ |
846 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
847 | device->power.states[ACPI_STATE_D0].power = 100; | |
848 | device->power.states[ACPI_STATE_D3].flags.valid = 1; | |
849 | device->power.states[ACPI_STATE_D3].power = 0; | |
c8f7a62c | 850 | |
9e89dde2 | 851 | /* TBD: System wake support and resource requirements. */ |
c8f7a62c | 852 | |
9e89dde2 | 853 | device->power.state = ACPI_STATE_UNKNOWN; |
a51e145f | 854 | acpi_bus_get_power(device->handle, &(device->power.state)); |
c8f7a62c | 855 | |
9e89dde2 ZR |
856 | return 0; |
857 | } | |
c8f7a62c | 858 | |
4be44fcd | 859 | static int acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 860 | { |
4be44fcd LB |
861 | acpi_status status = AE_OK; |
862 | acpi_handle temp = NULL; | |
1da177e4 | 863 | |
1da177e4 LT |
864 | |
865 | /* Presence of _STA indicates 'dynamic_status' */ | |
866 | status = acpi_get_handle(device->handle, "_STA", &temp); | |
867 | if (ACPI_SUCCESS(status)) | |
868 | device->flags.dynamic_status = 1; | |
869 | ||
1da177e4 LT |
870 | /* Presence of _RMV indicates 'removable' */ |
871 | status = acpi_get_handle(device->handle, "_RMV", &temp); | |
872 | if (ACPI_SUCCESS(status)) | |
873 | device->flags.removable = 1; | |
874 | ||
875 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
876 | status = acpi_get_handle(device->handle, "_EJD", &temp); | |
877 | if (ACPI_SUCCESS(status)) | |
878 | device->flags.ejectable = 1; | |
879 | else { | |
880 | status = acpi_get_handle(device->handle, "_EJ0", &temp); | |
881 | if (ACPI_SUCCESS(status)) | |
882 | device->flags.ejectable = 1; | |
883 | } | |
884 | ||
885 | /* Presence of _LCK indicates 'lockable' */ | |
886 | status = acpi_get_handle(device->handle, "_LCK", &temp); | |
887 | if (ACPI_SUCCESS(status)) | |
888 | device->flags.lockable = 1; | |
889 | ||
890 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ | |
891 | status = acpi_get_handle(device->handle, "_PS0", &temp); | |
892 | if (ACPI_FAILURE(status)) | |
893 | status = acpi_get_handle(device->handle, "_PR0", &temp); | |
894 | if (ACPI_SUCCESS(status)) | |
895 | device->flags.power_manageable = 1; | |
896 | ||
897 | /* Presence of _PRW indicates wake capable */ | |
898 | status = acpi_get_handle(device->handle, "_PRW", &temp); | |
899 | if (ACPI_SUCCESS(status)) | |
900 | device->flags.wake_capable = 1; | |
901 | ||
3c5f9be4 | 902 | /* TBD: Performance management */ |
1da177e4 | 903 | |
d550d98d | 904 | return 0; |
1da177e4 LT |
905 | } |
906 | ||
c7bcb4e9 | 907 | static void acpi_device_get_busid(struct acpi_device *device) |
1da177e4 | 908 | { |
4be44fcd LB |
909 | char bus_id[5] = { '?', 0 }; |
910 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
911 | int i = 0; | |
1da177e4 LT |
912 | |
913 | /* | |
914 | * Bus ID | |
915 | * ------ | |
916 | * The device's Bus ID is simply the object name. | |
917 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
918 | */ | |
859ac9a4 | 919 | if (ACPI_IS_ROOT_DEVICE(device)) { |
1da177e4 | 920 | strcpy(device->pnp.bus_id, "ACPI"); |
859ac9a4 BH |
921 | return; |
922 | } | |
923 | ||
924 | switch (device->device_type) { | |
1da177e4 LT |
925 | case ACPI_BUS_TYPE_POWER_BUTTON: |
926 | strcpy(device->pnp.bus_id, "PWRF"); | |
927 | break; | |
928 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
929 | strcpy(device->pnp.bus_id, "SLPF"); | |
930 | break; | |
931 | default: | |
66b7ed40 | 932 | acpi_get_name(device->handle, ACPI_SINGLE_NAME, &buffer); |
1da177e4 LT |
933 | /* Clean up trailing underscores (if any) */ |
934 | for (i = 3; i > 1; i--) { | |
935 | if (bus_id[i] == '_') | |
936 | bus_id[i] = '\0'; | |
937 | else | |
938 | break; | |
939 | } | |
940 | strcpy(device->pnp.bus_id, bus_id); | |
941 | break; | |
942 | } | |
943 | } | |
944 | ||
54735266 ZR |
945 | /* |
946 | * acpi_bay_match - see if a device is an ejectable driver bay | |
947 | * | |
948 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
949 | * then we can safely call it an ejectable drive bay | |
950 | */ | |
951 | static int acpi_bay_match(struct acpi_device *device){ | |
952 | acpi_status status; | |
953 | acpi_handle handle; | |
954 | acpi_handle tmp; | |
955 | acpi_handle phandle; | |
956 | ||
957 | handle = device->handle; | |
958 | ||
959 | status = acpi_get_handle(handle, "_EJ0", &tmp); | |
960 | if (ACPI_FAILURE(status)) | |
961 | return -ENODEV; | |
962 | ||
963 | if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || | |
964 | (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || | |
965 | (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || | |
966 | (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) | |
967 | return 0; | |
968 | ||
969 | if (acpi_get_parent(handle, &phandle)) | |
970 | return -ENODEV; | |
971 | ||
972 | if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) || | |
973 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) || | |
974 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) || | |
975 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp)))) | |
976 | return 0; | |
977 | ||
978 | return -ENODEV; | |
979 | } | |
980 | ||
3620f2f2 FS |
981 | /* |
982 | * acpi_dock_match - see if a device has a _DCK method | |
983 | */ | |
984 | static int acpi_dock_match(struct acpi_device *device) | |
985 | { | |
986 | acpi_handle tmp; | |
987 | return acpi_get_handle(device->handle, "_DCK", &tmp); | |
988 | } | |
989 | ||
7f47fa6c | 990 | char *acpi_device_hid(struct acpi_device *device) |
15b8dd53 | 991 | { |
7f47fa6c | 992 | struct acpi_hardware_id *hid; |
15b8dd53 | 993 | |
7f47fa6c BH |
994 | hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list); |
995 | return hid->id; | |
996 | } | |
997 | EXPORT_SYMBOL(acpi_device_hid); | |
15b8dd53 | 998 | |
7f47fa6c BH |
999 | static void acpi_add_id(struct acpi_device *device, const char *dev_id) |
1000 | { | |
1001 | struct acpi_hardware_id *id; | |
15b8dd53 | 1002 | |
7f47fa6c BH |
1003 | id = kmalloc(sizeof(*id), GFP_KERNEL); |
1004 | if (!id) | |
1005 | return; | |
15b8dd53 | 1006 | |
7f47fa6c BH |
1007 | id->id = kmalloc(strlen(dev_id) + 1, GFP_KERNEL); |
1008 | if (!id->id) { | |
1009 | kfree(id); | |
1010 | return; | |
15b8dd53 BM |
1011 | } |
1012 | ||
7f47fa6c BH |
1013 | strcpy(id->id, dev_id); |
1014 | list_add_tail(&id->list, &device->pnp.ids); | |
15b8dd53 BM |
1015 | } |
1016 | ||
c7bcb4e9 | 1017 | static void acpi_device_set_id(struct acpi_device *device) |
1da177e4 | 1018 | { |
4be44fcd | 1019 | acpi_status status; |
57f3674f BH |
1020 | struct acpi_device_info *info; |
1021 | struct acpica_device_id_list *cid_list; | |
7f47fa6c | 1022 | int i; |
1da177e4 | 1023 | |
c7bcb4e9 | 1024 | switch (device->device_type) { |
1da177e4 | 1025 | case ACPI_BUS_TYPE_DEVICE: |
859ac9a4 | 1026 | if (ACPI_IS_ROOT_DEVICE(device)) { |
57f3674f | 1027 | acpi_add_id(device, ACPI_SYSTEM_HID); |
859ac9a4 | 1028 | break; |
78b8e141 BH |
1029 | } else if (ACPI_IS_ROOT_DEVICE(device->parent)) { |
1030 | /* \_SB_, the only root-level namespace device */ | |
57f3674f | 1031 | acpi_add_id(device, ACPI_BUS_HID); |
78b8e141 BH |
1032 | strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME); |
1033 | strcpy(device->pnp.device_class, ACPI_BUS_CLASS); | |
1034 | break; | |
859ac9a4 BH |
1035 | } |
1036 | ||
66b7ed40 | 1037 | status = acpi_get_object_info(device->handle, &info); |
1da177e4 | 1038 | if (ACPI_FAILURE(status)) { |
96b2dd1f | 1039 | printk(KERN_ERR PREFIX "%s: Error reading device info\n", __func__); |
1da177e4 LT |
1040 | return; |
1041 | } | |
1042 | ||
1da177e4 | 1043 | if (info->valid & ACPI_VALID_HID) |
57f3674f BH |
1044 | acpi_add_id(device, info->hardware_id.string); |
1045 | if (info->valid & ACPI_VALID_CID) { | |
15b8dd53 | 1046 | cid_list = &info->compatible_id_list; |
57f3674f BH |
1047 | for (i = 0; i < cid_list->count; i++) |
1048 | acpi_add_id(device, cid_list->ids[i].string); | |
1049 | } | |
1da177e4 LT |
1050 | if (info->valid & ACPI_VALID_ADR) { |
1051 | device->pnp.bus_address = info->address; | |
1052 | device->flags.bus_address = 1; | |
1053 | } | |
ae843332 | 1054 | |
a83893ae BH |
1055 | kfree(info); |
1056 | ||
57f3674f BH |
1057 | /* |
1058 | * Some devices don't reliably have _HIDs & _CIDs, so add | |
1059 | * synthetic HIDs to make sure drivers can find them. | |
1060 | */ | |
c3d6de69 | 1061 | if (acpi_is_video_device(device)) |
57f3674f | 1062 | acpi_add_id(device, ACPI_VIDEO_HID); |
3620f2f2 | 1063 | else if (ACPI_SUCCESS(acpi_bay_match(device))) |
57f3674f | 1064 | acpi_add_id(device, ACPI_BAY_HID); |
3620f2f2 | 1065 | else if (ACPI_SUCCESS(acpi_dock_match(device))) |
57f3674f | 1066 | acpi_add_id(device, ACPI_DOCK_HID); |
54735266 | 1067 | |
1da177e4 LT |
1068 | break; |
1069 | case ACPI_BUS_TYPE_POWER: | |
57f3674f | 1070 | acpi_add_id(device, ACPI_POWER_HID); |
1da177e4 LT |
1071 | break; |
1072 | case ACPI_BUS_TYPE_PROCESSOR: | |
57f3674f | 1073 | acpi_add_id(device, ACPI_PROCESSOR_OBJECT_HID); |
1da177e4 | 1074 | break; |
1da177e4 | 1075 | case ACPI_BUS_TYPE_THERMAL: |
57f3674f | 1076 | acpi_add_id(device, ACPI_THERMAL_HID); |
1da177e4 LT |
1077 | break; |
1078 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
57f3674f | 1079 | acpi_add_id(device, ACPI_BUTTON_HID_POWERF); |
1da177e4 LT |
1080 | break; |
1081 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
57f3674f | 1082 | acpi_add_id(device, ACPI_BUTTON_HID_SLEEPF); |
1da177e4 LT |
1083 | break; |
1084 | } | |
1085 | ||
b1fbfb2a BH |
1086 | /* |
1087 | * We build acpi_devices for some objects that don't have _HID or _CID, | |
1088 | * e.g., PCI bridges and slots. Drivers can't bind to these objects, | |
1089 | * but we do use them indirectly by traversing the acpi_device tree. | |
1090 | * This generic ID isn't useful for driver binding, but it provides | |
1091 | * the useful property that "every acpi_device has an ID." | |
1092 | */ | |
57f3674f BH |
1093 | if (list_empty(&device->pnp.ids)) |
1094 | acpi_add_id(device, "device"); | |
1da177e4 LT |
1095 | } |
1096 | ||
bc3b0772 | 1097 | static int acpi_device_set_context(struct acpi_device *device) |
1da177e4 | 1098 | { |
bc3b0772 BH |
1099 | acpi_status status; |
1100 | ||
1da177e4 LT |
1101 | /* |
1102 | * Context | |
1103 | * ------- | |
1104 | * Attach this 'struct acpi_device' to the ACPI object. This makes | |
bc3b0772 BH |
1105 | * resolutions from handle->device very efficient. Fixed hardware |
1106 | * devices have no handles, so we skip them. | |
1da177e4 | 1107 | */ |
bc3b0772 BH |
1108 | if (!device->handle) |
1109 | return 0; | |
1da177e4 | 1110 | |
bc3b0772 BH |
1111 | status = acpi_attach_data(device->handle, |
1112 | acpi_bus_data_handler, device); | |
1113 | if (ACPI_SUCCESS(status)) | |
1114 | return 0; | |
1115 | ||
1116 | printk(KERN_ERR PREFIX "Error attaching device data\n"); | |
1117 | return -ENODEV; | |
1da177e4 LT |
1118 | } |
1119 | ||
4be44fcd | 1120 | static int acpi_bus_remove(struct acpi_device *dev, int rmdevice) |
1da177e4 | 1121 | { |
1da177e4 | 1122 | if (!dev) |
d550d98d | 1123 | return -EINVAL; |
1da177e4 | 1124 | |
96333578 | 1125 | dev->removal_type = ACPI_BUS_REMOVAL_EJECT; |
1890a97a | 1126 | device_release_driver(&dev->dev); |
1da177e4 LT |
1127 | |
1128 | if (!rmdevice) | |
d550d98d | 1129 | return 0; |
1da177e4 | 1130 | |
2786f6e3 RZ |
1131 | /* |
1132 | * unbind _ADR-Based Devices when hot removal | |
1133 | */ | |
1da177e4 LT |
1134 | if (dev->flags.bus_address) { |
1135 | if ((dev->parent) && (dev->parent->ops.unbind)) | |
1136 | dev->parent->ops.unbind(dev); | |
1137 | } | |
1da177e4 LT |
1138 | acpi_device_unregister(dev, ACPI_BUS_REMOVAL_EJECT); |
1139 | ||
d550d98d | 1140 | return 0; |
1da177e4 LT |
1141 | } |
1142 | ||
5c478f49 BH |
1143 | static int acpi_add_single_object(struct acpi_device **child, |
1144 | acpi_handle handle, int type, | |
778cbc1d | 1145 | unsigned long long sta, |
5c478f49 | 1146 | struct acpi_bus_ops *ops) |
1da177e4 | 1147 | { |
77c24888 BH |
1148 | int result; |
1149 | struct acpi_device *device; | |
29aaefa6 | 1150 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 1151 | |
36bcbec7 | 1152 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 1153 | if (!device) { |
6468463a | 1154 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 1155 | return -ENOMEM; |
1da177e4 | 1156 | } |
1da177e4 | 1157 | |
7f47fa6c | 1158 | INIT_LIST_HEAD(&device->pnp.ids); |
caaa6efb | 1159 | device->device_type = type; |
1da177e4 | 1160 | device->handle = handle; |
5c478f49 | 1161 | device->parent = acpi_bus_get_parent(handle); |
c4168bff | 1162 | device->bus_ops = *ops; /* workround for not call .start */ |
778cbc1d | 1163 | STRUCT_TO_INT(device->status) = sta; |
c4168bff | 1164 | |
c7bcb4e9 | 1165 | acpi_device_get_busid(device); |
1da177e4 LT |
1166 | |
1167 | /* | |
1168 | * Flags | |
1169 | * ----- | |
778cbc1d BH |
1170 | * Note that we only look for object handles -- cannot evaluate objects |
1171 | * until we know the device is present and properly initialized. | |
1da177e4 LT |
1172 | */ |
1173 | result = acpi_bus_get_flags(device); | |
1174 | if (result) | |
1175 | goto end; | |
1176 | ||
1da177e4 LT |
1177 | /* |
1178 | * Initialize Device | |
1179 | * ----------------- | |
1180 | * TBD: Synch with Core's enumeration/initialization process. | |
1181 | */ | |
c7bcb4e9 | 1182 | acpi_device_set_id(device); |
1da177e4 LT |
1183 | |
1184 | /* | |
1185 | * Power Management | |
1186 | * ---------------- | |
1187 | */ | |
1188 | if (device->flags.power_manageable) { | |
1189 | result = acpi_bus_get_power_flags(device); | |
1190 | if (result) | |
1191 | goto end; | |
1192 | } | |
1193 | ||
4be44fcd | 1194 | /* |
1da177e4 LT |
1195 | * Wakeup device management |
1196 | *----------------------- | |
1197 | */ | |
1198 | if (device->flags.wake_capable) { | |
1199 | result = acpi_bus_get_wakeup_device_flags(device); | |
1200 | if (result) | |
1201 | goto end; | |
1202 | } | |
1203 | ||
1204 | /* | |
1205 | * Performance Management | |
1206 | * ---------------------- | |
1207 | */ | |
1208 | if (device->flags.performance_manageable) { | |
1209 | result = acpi_bus_get_perf_flags(device); | |
1210 | if (result) | |
1211 | goto end; | |
1212 | } | |
1213 | ||
bc3b0772 | 1214 | if ((result = acpi_device_set_context(device))) |
f61f9258 | 1215 | goto end; |
1da177e4 | 1216 | |
66b7ed40 | 1217 | result = acpi_device_register(device); |
1da177e4 LT |
1218 | |
1219 | /* | |
2786f6e3 | 1220 | * Bind _ADR-Based Devices when hot add |
1da177e4 LT |
1221 | */ |
1222 | if (device->flags.bus_address) { | |
1223 | if (device->parent && device->parent->ops.bind) | |
1224 | device->parent->ops.bind(device); | |
1225 | } | |
1226 | ||
0c526d96 | 1227 | end: |
29aaefa6 BH |
1228 | if (!result) { |
1229 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1230 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
1231 | "Adding %s [%s] parent %s\n", dev_name(&device->dev), | |
1232 | (char *) buffer.pointer, | |
1233 | device->parent ? dev_name(&device->parent->dev) : | |
1234 | "(null)")); | |
1235 | kfree(buffer.pointer); | |
1da177e4 | 1236 | *child = device; |
29aaefa6 | 1237 | } else |
718fb0de | 1238 | acpi_device_release(&device->dev); |
1da177e4 | 1239 | |
d550d98d | 1240 | return result; |
1da177e4 | 1241 | } |
1da177e4 | 1242 | |
778cbc1d BH |
1243 | #define ACPI_STA_DEFAULT (ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | \ |
1244 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING) | |
1245 | ||
1246 | static int acpi_bus_type_and_status(acpi_handle handle, int *type, | |
1247 | unsigned long long *sta) | |
1da177e4 | 1248 | { |
778cbc1d BH |
1249 | acpi_status status; |
1250 | acpi_object_type acpi_type; | |
1da177e4 | 1251 | |
778cbc1d | 1252 | status = acpi_get_type(handle, &acpi_type); |
51a85faf | 1253 | if (ACPI_FAILURE(status)) |
778cbc1d | 1254 | return -ENODEV; |
4be44fcd | 1255 | |
778cbc1d | 1256 | switch (acpi_type) { |
51a85faf BH |
1257 | case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */ |
1258 | case ACPI_TYPE_DEVICE: | |
778cbc1d BH |
1259 | *type = ACPI_BUS_TYPE_DEVICE; |
1260 | status = acpi_bus_get_status_handle(handle, sta); | |
1261 | if (ACPI_FAILURE(status)) | |
1262 | return -ENODEV; | |
51a85faf BH |
1263 | break; |
1264 | case ACPI_TYPE_PROCESSOR: | |
778cbc1d BH |
1265 | *type = ACPI_BUS_TYPE_PROCESSOR; |
1266 | status = acpi_bus_get_status_handle(handle, sta); | |
1267 | if (ACPI_FAILURE(status)) | |
1268 | return -ENODEV; | |
51a85faf BH |
1269 | break; |
1270 | case ACPI_TYPE_THERMAL: | |
778cbc1d BH |
1271 | *type = ACPI_BUS_TYPE_THERMAL; |
1272 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1273 | break; |
1274 | case ACPI_TYPE_POWER: | |
778cbc1d BH |
1275 | *type = ACPI_BUS_TYPE_POWER; |
1276 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1277 | break; |
1278 | default: | |
778cbc1d | 1279 | return -ENODEV; |
51a85faf | 1280 | } |
1da177e4 | 1281 | |
778cbc1d BH |
1282 | return 0; |
1283 | } | |
1284 | ||
1285 | static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl, | |
1286 | void *context, void **return_value) | |
1287 | { | |
1288 | struct acpi_bus_ops *ops = context; | |
778cbc1d BH |
1289 | int type; |
1290 | unsigned long long sta; | |
e3b87f8a BH |
1291 | struct acpi_device *device; |
1292 | acpi_status status; | |
778cbc1d BH |
1293 | int result; |
1294 | ||
1295 | result = acpi_bus_type_and_status(handle, &type, &sta); | |
1296 | if (result) | |
1297 | return AE_OK; | |
1298 | ||
1299 | if (!(sta & ACPI_STA_DEVICE_PRESENT) && | |
1300 | !(sta & ACPI_STA_DEVICE_FUNCTIONING)) | |
1301 | return AE_CTRL_DEPTH; | |
1302 | ||
e3b87f8a BH |
1303 | /* |
1304 | * We may already have an acpi_device from a previous enumeration. If | |
1305 | * so, we needn't add it again, but we may still have to start it. | |
1306 | */ | |
1307 | device = NULL; | |
1308 | acpi_bus_get_device(handle, &device); | |
1309 | if (ops->acpi_op_add && !device) | |
1310 | acpi_add_single_object(&device, handle, type, sta, ops); | |
1da177e4 | 1311 | |
e3b87f8a | 1312 | if (!device) |
51a85faf | 1313 | return AE_CTRL_DEPTH; |
1da177e4 | 1314 | |
51a85faf BH |
1315 | if (ops->acpi_op_start && !(ops->acpi_op_add)) { |
1316 | status = acpi_start_single_object(device); | |
1da177e4 | 1317 | if (ACPI_FAILURE(status)) |
51a85faf BH |
1318 | return AE_CTRL_DEPTH; |
1319 | } | |
1da177e4 | 1320 | |
51a85faf BH |
1321 | if (!*return_value) |
1322 | *return_value = device; | |
1323 | return AE_OK; | |
1324 | } | |
3fb02738 | 1325 | |
51a85faf BH |
1326 | static int acpi_bus_scan(acpi_handle handle, struct acpi_bus_ops *ops, |
1327 | struct acpi_device **child) | |
1328 | { | |
1329 | acpi_status status; | |
51a85faf | 1330 | void *device = NULL; |
3fb02738 | 1331 | |
51a85faf BH |
1332 | status = acpi_bus_check_add(handle, 0, ops, &device); |
1333 | if (ACPI_SUCCESS(status)) | |
1334 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
2263576c | 1335 | acpi_bus_check_add, NULL, ops, &device); |
1da177e4 | 1336 | |
51a85faf BH |
1337 | if (child) |
1338 | *child = device; | |
d550d98d | 1339 | return 0; |
1da177e4 | 1340 | } |
1da177e4 | 1341 | |
3fb02738 | 1342 | int |
4be44fcd LB |
1343 | acpi_bus_add(struct acpi_device **child, |
1344 | struct acpi_device *parent, acpi_handle handle, int type) | |
3fb02738 | 1345 | { |
3fb02738 RS |
1346 | struct acpi_bus_ops ops; |
1347 | ||
c4168bff LS |
1348 | memset(&ops, 0, sizeof(ops)); |
1349 | ops.acpi_op_add = 1; | |
3fb02738 | 1350 | |
51a85faf BH |
1351 | acpi_bus_scan(handle, &ops, child); |
1352 | return 0; | |
3fb02738 RS |
1353 | } |
1354 | EXPORT_SYMBOL(acpi_bus_add); | |
1355 | ||
4be44fcd | 1356 | int acpi_bus_start(struct acpi_device *device) |
3fb02738 | 1357 | { |
3fb02738 RS |
1358 | struct acpi_bus_ops ops; |
1359 | ||
8e029bf0 BH |
1360 | memset(&ops, 0, sizeof(ops)); |
1361 | ops.acpi_op_start = 1; | |
3fb02738 | 1362 | |
51a85faf BH |
1363 | acpi_bus_scan(device->handle, &ops, NULL); |
1364 | return 0; | |
3fb02738 RS |
1365 | } |
1366 | EXPORT_SYMBOL(acpi_bus_start); | |
1da177e4 | 1367 | |
ceaba663 | 1368 | int acpi_bus_trim(struct acpi_device *start, int rmdevice) |
1da177e4 | 1369 | { |
4be44fcd LB |
1370 | acpi_status status; |
1371 | struct acpi_device *parent, *child; | |
1372 | acpi_handle phandle, chandle; | |
1373 | acpi_object_type type; | |
1374 | u32 level = 1; | |
1375 | int err = 0; | |
1376 | ||
1377 | parent = start; | |
1da177e4 LT |
1378 | phandle = start->handle; |
1379 | child = chandle = NULL; | |
1380 | ||
1381 | while ((level > 0) && parent && (!err)) { | |
1382 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, | |
4be44fcd | 1383 | chandle, &chandle); |
1da177e4 LT |
1384 | |
1385 | /* | |
1386 | * If this scope is exhausted then move our way back up. | |
1387 | */ | |
1388 | if (ACPI_FAILURE(status)) { | |
1389 | level--; | |
1390 | chandle = phandle; | |
1391 | acpi_get_parent(phandle, &phandle); | |
1392 | child = parent; | |
1393 | parent = parent->parent; | |
1394 | ||
1395 | if (level == 0) | |
1396 | err = acpi_bus_remove(child, rmdevice); | |
1397 | else | |
1398 | err = acpi_bus_remove(child, 1); | |
1399 | ||
1400 | continue; | |
1401 | } | |
1402 | ||
1403 | status = acpi_get_type(chandle, &type); | |
1404 | if (ACPI_FAILURE(status)) { | |
1405 | continue; | |
1406 | } | |
1407 | /* | |
1408 | * If there is a device corresponding to chandle then | |
1409 | * parse it (depth-first). | |
1410 | */ | |
1411 | if (acpi_bus_get_device(chandle, &child) == 0) { | |
1412 | level++; | |
1413 | phandle = chandle; | |
1414 | chandle = NULL; | |
1415 | parent = child; | |
1416 | } | |
1417 | continue; | |
1418 | } | |
1419 | return err; | |
1420 | } | |
ceaba663 KA |
1421 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
1422 | ||
e8b945c9 | 1423 | static int acpi_bus_scan_fixed(void) |
1da177e4 | 1424 | { |
4be44fcd LB |
1425 | int result = 0; |
1426 | struct acpi_device *device = NULL; | |
c4168bff | 1427 | struct acpi_bus_ops ops; |
1da177e4 | 1428 | |
c4168bff LS |
1429 | memset(&ops, 0, sizeof(ops)); |
1430 | ops.acpi_op_add = 1; | |
1431 | ops.acpi_op_start = 1; | |
1432 | ||
1da177e4 LT |
1433 | /* |
1434 | * Enumerate all fixed-feature devices. | |
1435 | */ | |
cee324b1 | 1436 | if ((acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON) == 0) { |
5c478f49 | 1437 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1438 | ACPI_BUS_TYPE_POWER_BUTTON, |
778cbc1d | 1439 | ACPI_STA_DEFAULT, |
c4168bff | 1440 | &ops); |
3fb02738 | 1441 | } |
1da177e4 | 1442 | |
cee324b1 | 1443 | if ((acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON) == 0) { |
5c478f49 | 1444 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1445 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
778cbc1d | 1446 | ACPI_STA_DEFAULT, |
c4168bff | 1447 | &ops); |
3fb02738 | 1448 | } |
1da177e4 | 1449 | |
d550d98d | 1450 | return result; |
1da177e4 LT |
1451 | } |
1452 | ||
e747f274 | 1453 | int __init acpi_scan_init(void) |
1da177e4 LT |
1454 | { |
1455 | int result; | |
3fb02738 | 1456 | struct acpi_bus_ops ops; |
1da177e4 | 1457 | |
c4168bff LS |
1458 | memset(&ops, 0, sizeof(ops)); |
1459 | ops.acpi_op_add = 1; | |
1460 | ops.acpi_op_start = 1; | |
1da177e4 | 1461 | |
5b327265 PM |
1462 | result = bus_register(&acpi_bus_type); |
1463 | if (result) { | |
1464 | /* We don't want to quit even if we failed to add suspend/resume */ | |
1465 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
1466 | } | |
1467 | ||
1da177e4 LT |
1468 | /* |
1469 | * Enumerate devices in the ACPI namespace. | |
1470 | */ | |
51a85faf | 1471 | result = acpi_bus_scan(ACPI_ROOT_OBJECT, &ops, &acpi_root); |
c04209a7 | 1472 | |
c4168bff | 1473 | if (!result) |
adc08e20 | 1474 | result = acpi_bus_scan_fixed(); |
1da177e4 LT |
1475 | |
1476 | if (result) | |
1477 | acpi_device_unregister(acpi_root, ACPI_BUS_REMOVAL_NORMAL); | |
1478 | ||
d550d98d | 1479 | return result; |
1da177e4 | 1480 | } |