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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> | |
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 | |
b2972f87 | 50 | if (!acpi_dev->flags.hardware_id) |
29b71a1c TR |
51 | return -ENODEV; |
52 | ||
5c9fcb5d | 53 | len = snprintf(modalias, size, "acpi:"); |
29b71a1c TR |
54 | size -= len; |
55 | ||
7f47fa6c BH |
56 | list_for_each_entry(id, &acpi_dev->pnp.ids, list) { |
57 | count = snprintf(&modalias[len], size, "%s:", id->id); | |
5c9fcb5d ZR |
58 | if (count < 0 || count >= size) |
59 | return -EINVAL; | |
60 | len += count; | |
61 | size -= count; | |
62 | } | |
63 | ||
29b71a1c TR |
64 | modalias[len] = '\0'; |
65 | return len; | |
66 | } | |
67 | ||
68 | static ssize_t | |
69 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
70 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
71 | int len; | |
72 | ||
73 | /* Device has no HID and no CID or string is >1024 */ | |
74 | len = create_modalias(acpi_dev, buf, 1024); | |
75 | if (len <= 0) | |
76 | return 0; | |
77 | buf[len++] = '\n'; | |
78 | return len; | |
79 | } | |
80 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); | |
81 | ||
c8d72a5e | 82 | static void acpi_bus_hot_remove_device(void *context) |
1da177e4 | 83 | { |
26d46867 ZR |
84 | struct acpi_device *device; |
85 | acpi_handle handle = context; | |
1da177e4 LT |
86 | struct acpi_object_list arg_list; |
87 | union acpi_object arg; | |
88 | acpi_status status = AE_OK; | |
1da177e4 | 89 | |
26d46867 | 90 | if (acpi_bus_get_device(handle, &device)) |
c8d72a5e | 91 | return; |
26d46867 ZR |
92 | |
93 | if (!device) | |
c8d72a5e | 94 | return; |
26d46867 ZR |
95 | |
96 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
0794469d | 97 | "Hot-removing device %s...\n", dev_name(&device->dev))); |
26d46867 ZR |
98 | |
99 | if (acpi_bus_trim(device, 1)) { | |
55ac9a01 LM |
100 | printk(KERN_ERR PREFIX |
101 | "Removing device failed\n"); | |
c8d72a5e | 102 | return; |
26d46867 | 103 | } |
1da177e4 | 104 | |
26d46867 ZR |
105 | /* power off device */ |
106 | status = acpi_evaluate_object(handle, "_PS3", NULL, NULL); | |
107 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) | |
55ac9a01 LM |
108 | printk(KERN_WARNING PREFIX |
109 | "Power-off device failed\n"); | |
26d46867 ZR |
110 | |
111 | if (device->flags.lockable) { | |
1da177e4 LT |
112 | arg_list.count = 1; |
113 | arg_list.pointer = &arg; | |
114 | arg.type = ACPI_TYPE_INTEGER; | |
115 | arg.integer.value = 0; | |
116 | acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); | |
117 | } | |
1da177e4 | 118 | |
1da177e4 LT |
119 | arg_list.count = 1; |
120 | arg_list.pointer = &arg; | |
121 | arg.type = ACPI_TYPE_INTEGER; | |
122 | arg.integer.value = 1; | |
1da177e4 | 123 | |
1da177e4 LT |
124 | /* |
125 | * TBD: _EJD support. | |
126 | */ | |
1da177e4 | 127 | status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); |
26d46867 | 128 | if (ACPI_FAILURE(status)) |
c8d72a5e ZR |
129 | printk(KERN_WARNING PREFIX |
130 | "Eject device failed\n"); | |
1da177e4 | 131 | |
c8d72a5e | 132 | return; |
1da177e4 LT |
133 | } |
134 | ||
1da177e4 | 135 | static ssize_t |
f883d9db PM |
136 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
137 | const char *buf, size_t count) | |
1da177e4 | 138 | { |
4be44fcd | 139 | int ret = count; |
4be44fcd | 140 | acpi_status status; |
4be44fcd | 141 | acpi_object_type type = 0; |
f883d9db | 142 | struct acpi_device *acpi_device = to_acpi_device(d); |
1da177e4 | 143 | |
1da177e4 LT |
144 | if ((!count) || (buf[0] != '1')) { |
145 | return -EINVAL; | |
146 | } | |
1da177e4 | 147 | #ifndef FORCE_EJECT |
f883d9db | 148 | if (acpi_device->driver == NULL) { |
1da177e4 LT |
149 | ret = -ENODEV; |
150 | goto err; | |
151 | } | |
152 | #endif | |
f883d9db PM |
153 | status = acpi_get_type(acpi_device->handle, &type); |
154 | if (ACPI_FAILURE(status) || (!acpi_device->flags.ejectable)) { | |
1da177e4 LT |
155 | ret = -ENODEV; |
156 | goto err; | |
157 | } | |
1da177e4 | 158 | |
c8d72a5e | 159 | acpi_os_hotplug_execute(acpi_bus_hot_remove_device, acpi_device->handle); |
74523c90 | 160 | err: |
1da177e4 | 161 | return ret; |
1da177e4 LT |
162 | } |
163 | ||
f883d9db | 164 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
1da177e4 | 165 | |
e49bd2dd ZR |
166 | static ssize_t |
167 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
168 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1da177e4 | 169 | |
ea8d82fd | 170 | return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev)); |
1da177e4 | 171 | } |
e49bd2dd | 172 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
1da177e4 | 173 | |
e49bd2dd ZR |
174 | static ssize_t |
175 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
176 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
177 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
178 | int result; | |
1da177e4 | 179 | |
e49bd2dd | 180 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
0c526d96 | 181 | if (result) |
e49bd2dd | 182 | goto end; |
1da177e4 | 183 | |
e49bd2dd ZR |
184 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
185 | kfree(path.pointer); | |
0c526d96 | 186 | end: |
e49bd2dd | 187 | return result; |
1da177e4 | 188 | } |
e49bd2dd | 189 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
1da177e4 | 190 | |
e49bd2dd | 191 | static int acpi_device_setup_files(struct acpi_device *dev) |
1da177e4 | 192 | { |
f883d9db PM |
193 | acpi_status status; |
194 | acpi_handle temp; | |
e49bd2dd | 195 | int result = 0; |
1da177e4 LT |
196 | |
197 | /* | |
e49bd2dd | 198 | * Devices gotten from FADT don't have a "path" attribute |
1da177e4 | 199 | */ |
0c526d96 | 200 | if (dev->handle) { |
e49bd2dd | 201 | result = device_create_file(&dev->dev, &dev_attr_path); |
0c526d96 | 202 | if (result) |
e49bd2dd | 203 | goto end; |
1da177e4 LT |
204 | } |
205 | ||
0c526d96 | 206 | if (dev->flags.hardware_id) { |
e49bd2dd | 207 | result = device_create_file(&dev->dev, &dev_attr_hid); |
0c526d96 | 208 | if (result) |
e49bd2dd ZR |
209 | goto end; |
210 | } | |
1da177e4 | 211 | |
b2972f87 | 212 | if (dev->flags.hardware_id) { |
29b71a1c | 213 | result = device_create_file(&dev->dev, &dev_attr_modalias); |
0c526d96 | 214 | if (result) |
29b71a1c TR |
215 | goto end; |
216 | } | |
217 | ||
e49bd2dd ZR |
218 | /* |
219 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
220 | * hot-removal function from userland. | |
221 | */ | |
f883d9db PM |
222 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); |
223 | if (ACPI_SUCCESS(status)) | |
e49bd2dd | 224 | result = device_create_file(&dev->dev, &dev_attr_eject); |
0c526d96 | 225 | end: |
e49bd2dd | 226 | return result; |
1da177e4 LT |
227 | } |
228 | ||
f883d9db | 229 | static void acpi_device_remove_files(struct acpi_device *dev) |
1da177e4 | 230 | { |
f883d9db PM |
231 | acpi_status status; |
232 | acpi_handle temp; | |
1da177e4 | 233 | |
f883d9db PM |
234 | /* |
235 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
236 | * hot-removal function from userland. | |
237 | */ | |
238 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); | |
239 | if (ACPI_SUCCESS(status)) | |
240 | device_remove_file(&dev->dev, &dev_attr_eject); | |
1da177e4 | 241 | |
b2972f87 | 242 | if (dev->flags.hardware_id) |
29b71a1c TR |
243 | device_remove_file(&dev->dev, &dev_attr_modalias); |
244 | ||
0c526d96 | 245 | if (dev->flags.hardware_id) |
e49bd2dd | 246 | device_remove_file(&dev->dev, &dev_attr_hid); |
0c526d96 | 247 | if (dev->handle) |
e49bd2dd | 248 | device_remove_file(&dev->dev, &dev_attr_path); |
1da177e4 | 249 | } |
1da177e4 | 250 | /* -------------------------------------------------------------------------- |
9e89dde2 | 251 | ACPI Bus operations |
1da177e4 | 252 | -------------------------------------------------------------------------- */ |
29b71a1c TR |
253 | |
254 | int acpi_match_device_ids(struct acpi_device *device, | |
255 | const struct acpi_device_id *ids) | |
256 | { | |
257 | const struct acpi_device_id *id; | |
7f47fa6c | 258 | struct acpi_hardware_id *hwid; |
29b71a1c | 259 | |
39a0ad87 ZY |
260 | /* |
261 | * If the device is not present, it is unnecessary to load device | |
262 | * driver for it. | |
263 | */ | |
264 | if (!device->status.present) | |
265 | return -ENODEV; | |
266 | ||
7f47fa6c BH |
267 | for (id = ids; id->id[0]; id++) |
268 | list_for_each_entry(hwid, &device->pnp.ids, list) | |
269 | if (!strcmp((char *) id->id, hwid->id)) | |
29b71a1c | 270 | return 0; |
29b71a1c TR |
271 | |
272 | return -ENOENT; | |
273 | } | |
274 | EXPORT_SYMBOL(acpi_match_device_ids); | |
275 | ||
7f47fa6c BH |
276 | static void acpi_free_ids(struct acpi_device *device) |
277 | { | |
278 | struct acpi_hardware_id *id, *tmp; | |
279 | ||
280 | list_for_each_entry_safe(id, tmp, &device->pnp.ids, list) { | |
281 | kfree(id->id); | |
282 | kfree(id); | |
283 | } | |
284 | } | |
285 | ||
1890a97a | 286 | static void acpi_device_release(struct device *dev) |
1da177e4 | 287 | { |
1890a97a | 288 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 289 | |
7f47fa6c | 290 | acpi_free_ids(acpi_dev); |
1890a97a | 291 | kfree(acpi_dev); |
1da177e4 LT |
292 | } |
293 | ||
5d9464a4 | 294 | static int acpi_device_suspend(struct device *dev, pm_message_t state) |
1da177e4 | 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.suspend) |
300 | return acpi_drv->ops.suspend(acpi_dev, state); | |
1da177e4 LT |
301 | return 0; |
302 | } | |
1da177e4 | 303 | |
5d9464a4 | 304 | static int acpi_device_resume(struct device *dev) |
9e89dde2 | 305 | { |
5d9464a4 PM |
306 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
307 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
1da177e4 | 308 | |
5d9464a4 PM |
309 | if (acpi_drv && acpi_drv->ops.resume) |
310 | return acpi_drv->ops.resume(acpi_dev); | |
d550d98d | 311 | return 0; |
1da177e4 LT |
312 | } |
313 | ||
5d9464a4 | 314 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 315 | { |
5d9464a4 PM |
316 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
317 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
1da177e4 | 318 | |
29b71a1c | 319 | return !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
5d9464a4 | 320 | } |
1da177e4 | 321 | |
7eff2e7a | 322 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 | 323 | { |
5d9464a4 | 324 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
7eff2e7a | 325 | int len; |
5d9464a4 | 326 | |
7eff2e7a KS |
327 | if (add_uevent_var(env, "MODALIAS=")) |
328 | return -ENOMEM; | |
329 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], | |
330 | sizeof(env->buf) - env->buflen); | |
331 | if (len >= (sizeof(env->buf) - env->buflen)) | |
332 | return -ENOMEM; | |
333 | env->buflen += len; | |
9e89dde2 | 334 | return 0; |
1da177e4 LT |
335 | } |
336 | ||
46ec8598 BH |
337 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
338 | { | |
339 | struct acpi_device *device = data; | |
340 | ||
341 | device->driver->ops.notify(device, event); | |
342 | } | |
343 | ||
344 | static acpi_status acpi_device_notify_fixed(void *data) | |
345 | { | |
346 | struct acpi_device *device = data; | |
347 | ||
53de5356 BH |
348 | /* Fixed hardware devices have no handles */ |
349 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); | |
46ec8598 BH |
350 | return AE_OK; |
351 | } | |
352 | ||
353 | static int acpi_device_install_notify_handler(struct acpi_device *device) | |
354 | { | |
355 | acpi_status status; | |
46ec8598 | 356 | |
ccba2a36 | 357 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
358 | status = |
359 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
360 | acpi_device_notify_fixed, | |
361 | device); | |
ccba2a36 | 362 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
363 | status = |
364 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
365 | acpi_device_notify_fixed, | |
366 | device); | |
367 | else | |
368 | status = acpi_install_notify_handler(device->handle, | |
369 | ACPI_DEVICE_NOTIFY, | |
370 | acpi_device_notify, | |
371 | device); | |
372 | ||
373 | if (ACPI_FAILURE(status)) | |
374 | return -EINVAL; | |
375 | return 0; | |
376 | } | |
377 | ||
378 | static void acpi_device_remove_notify_handler(struct acpi_device *device) | |
379 | { | |
ccba2a36 | 380 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
381 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, |
382 | acpi_device_notify_fixed); | |
ccba2a36 | 383 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
384 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, |
385 | acpi_device_notify_fixed); | |
386 | else | |
387 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, | |
388 | acpi_device_notify); | |
389 | } | |
390 | ||
5d9464a4 PM |
391 | static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *); |
392 | static int acpi_start_single_object(struct acpi_device *); | |
393 | static int acpi_device_probe(struct device * dev) | |
1da177e4 | 394 | { |
5d9464a4 PM |
395 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
396 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
397 | int ret; | |
398 | ||
399 | ret = acpi_bus_driver_init(acpi_dev, acpi_drv); | |
400 | if (!ret) { | |
c4168bff LS |
401 | if (acpi_dev->bus_ops.acpi_op_start) |
402 | acpi_start_single_object(acpi_dev); | |
46ec8598 BH |
403 | |
404 | if (acpi_drv->ops.notify) { | |
405 | ret = acpi_device_install_notify_handler(acpi_dev); | |
406 | if (ret) { | |
46ec8598 BH |
407 | if (acpi_drv->ops.remove) |
408 | acpi_drv->ops.remove(acpi_dev, | |
409 | acpi_dev->removal_type); | |
410 | return ret; | |
411 | } | |
412 | } | |
413 | ||
5d9464a4 PM |
414 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
415 | "Found driver [%s] for device [%s]\n", | |
416 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
417 | get_device(dev); | |
418 | } | |
419 | return ret; | |
420 | } | |
1da177e4 | 421 | |
5d9464a4 PM |
422 | static int acpi_device_remove(struct device * dev) |
423 | { | |
424 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
425 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
426 | ||
427 | if (acpi_drv) { | |
46ec8598 BH |
428 | if (acpi_drv->ops.notify) |
429 | acpi_device_remove_notify_handler(acpi_dev); | |
5d9464a4 | 430 | if (acpi_drv->ops.remove) |
96333578 | 431 | acpi_drv->ops.remove(acpi_dev, acpi_dev->removal_type); |
1da177e4 | 432 | } |
5d9464a4 | 433 | acpi_dev->driver = NULL; |
db89b4f0 | 434 | acpi_dev->driver_data = NULL; |
1da177e4 | 435 | |
5d9464a4 | 436 | put_device(dev); |
9e89dde2 ZR |
437 | return 0; |
438 | } | |
1da177e4 | 439 | |
55955aad | 440 | struct bus_type acpi_bus_type = { |
9e89dde2 ZR |
441 | .name = "acpi", |
442 | .suspend = acpi_device_suspend, | |
443 | .resume = acpi_device_resume, | |
5d9464a4 PM |
444 | .match = acpi_bus_match, |
445 | .probe = acpi_device_probe, | |
446 | .remove = acpi_device_remove, | |
447 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
448 | }; |
449 | ||
66b7ed40 | 450 | static int acpi_device_register(struct acpi_device *device) |
1da177e4 | 451 | { |
4be44fcd | 452 | int result; |
e49bd2dd ZR |
453 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
454 | int found = 0; | |
66b7ed40 | 455 | |
9e89dde2 ZR |
456 | /* |
457 | * Linkage | |
458 | * ------- | |
459 | * Link this device to its parent and siblings. | |
460 | */ | |
461 | INIT_LIST_HEAD(&device->children); | |
462 | INIT_LIST_HEAD(&device->node); | |
9e89dde2 | 463 | INIT_LIST_HEAD(&device->wakeup_list); |
1da177e4 | 464 | |
e49bd2dd ZR |
465 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
466 | if (!new_bus_id) { | |
467 | printk(KERN_ERR PREFIX "Memory allocation error\n"); | |
468 | return -ENOMEM; | |
1da177e4 | 469 | } |
e49bd2dd | 470 | |
9090589d | 471 | mutex_lock(&acpi_device_lock); |
e49bd2dd ZR |
472 | /* |
473 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
474 | * If failed, create one and link it into acpi_bus_id_list | |
475 | */ | |
476 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
ea8d82fd | 477 | if (!strcmp(acpi_device_bus_id->bus_id, device->flags.hardware_id ? acpi_device_hid(device) : "device")) { |
e49bd2dd ZR |
478 | acpi_device_bus_id->instance_no ++; |
479 | found = 1; | |
480 | kfree(new_bus_id); | |
481 | break; | |
482 | } | |
1da177e4 | 483 | } |
0c526d96 | 484 | if (!found) { |
e49bd2dd | 485 | acpi_device_bus_id = new_bus_id; |
ea8d82fd | 486 | strcpy(acpi_device_bus_id->bus_id, device->flags.hardware_id ? acpi_device_hid(device) : "device"); |
e49bd2dd ZR |
487 | acpi_device_bus_id->instance_no = 0; |
488 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 489 | } |
0794469d | 490 | dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 491 | |
33b57150 | 492 | if (device->parent) |
9e89dde2 | 493 | list_add_tail(&device->node, &device->parent->children); |
33b57150 | 494 | |
9e89dde2 ZR |
495 | if (device->wakeup.flags.valid) |
496 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
9090589d | 497 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 498 | |
1890a97a | 499 | if (device->parent) |
66b7ed40 | 500 | device->dev.parent = &device->parent->dev; |
1890a97a | 501 | device->dev.bus = &acpi_bus_type; |
1890a97a | 502 | device->dev.release = &acpi_device_release; |
8b12b922 | 503 | result = device_register(&device->dev); |
0c526d96 | 504 | if (result) { |
8b12b922 | 505 | dev_err(&device->dev, "Error registering device\n"); |
e49bd2dd | 506 | goto end; |
1da177e4 | 507 | } |
1da177e4 | 508 | |
e49bd2dd | 509 | result = acpi_device_setup_files(device); |
0c526d96 | 510 | if (result) |
0794469d KS |
511 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
512 | dev_name(&device->dev)); | |
1da177e4 | 513 | |
96333578 | 514 | device->removal_type = ACPI_BUS_REMOVAL_NORMAL; |
1da177e4 | 515 | return 0; |
0c526d96 | 516 | end: |
9090589d | 517 | mutex_lock(&acpi_device_lock); |
33b57150 | 518 | if (device->parent) |
e49bd2dd | 519 | list_del(&device->node); |
e49bd2dd | 520 | list_del(&device->wakeup_list); |
9090589d | 521 | mutex_unlock(&acpi_device_lock); |
e49bd2dd | 522 | return result; |
1da177e4 LT |
523 | } |
524 | ||
9e89dde2 ZR |
525 | static void acpi_device_unregister(struct acpi_device *device, int type) |
526 | { | |
9090589d | 527 | mutex_lock(&acpi_device_lock); |
33b57150 | 528 | if (device->parent) |
9e89dde2 | 529 | list_del(&device->node); |
1da177e4 | 530 | |
9e89dde2 | 531 | list_del(&device->wakeup_list); |
9090589d | 532 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 533 | |
9e89dde2 | 534 | acpi_detach_data(device->handle, acpi_bus_data_handler); |
1890a97a | 535 | |
f883d9db | 536 | acpi_device_remove_files(device); |
1890a97a | 537 | device_unregister(&device->dev); |
1da177e4 LT |
538 | } |
539 | ||
9e89dde2 ZR |
540 | /* -------------------------------------------------------------------------- |
541 | Driver Management | |
542 | -------------------------------------------------------------------------- */ | |
1da177e4 | 543 | /** |
d758a8fa RD |
544 | * acpi_bus_driver_init - add a device to a driver |
545 | * @device: the device to add and initialize | |
546 | * @driver: driver for the device | |
547 | * | |
0c526d96 | 548 | * Used to initialize a device via its device driver. Called whenever a |
1890a97a | 549 | * driver is bound to a device. Invokes the driver's add() ops. |
1da177e4 LT |
550 | */ |
551 | static int | |
4be44fcd | 552 | acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) |
1da177e4 | 553 | { |
4be44fcd | 554 | int result = 0; |
1da177e4 | 555 | |
1da177e4 | 556 | if (!device || !driver) |
d550d98d | 557 | return -EINVAL; |
1da177e4 LT |
558 | |
559 | if (!driver->ops.add) | |
d550d98d | 560 | return -ENOSYS; |
1da177e4 LT |
561 | |
562 | result = driver->ops.add(device); | |
563 | if (result) { | |
564 | device->driver = NULL; | |
db89b4f0 | 565 | device->driver_data = NULL; |
d550d98d | 566 | return result; |
1da177e4 LT |
567 | } |
568 | ||
569 | device->driver = driver; | |
570 | ||
571 | /* | |
572 | * TBD - Configuration Management: Assign resources to device based | |
573 | * upon possible configuration and currently allocated resources. | |
574 | */ | |
575 | ||
4be44fcd LB |
576 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
577 | "Driver successfully bound to device\n")); | |
d550d98d | 578 | return 0; |
3fb02738 RS |
579 | } |
580 | ||
8713cbef | 581 | static int acpi_start_single_object(struct acpi_device *device) |
3fb02738 RS |
582 | { |
583 | int result = 0; | |
584 | struct acpi_driver *driver; | |
585 | ||
3fb02738 RS |
586 | |
587 | if (!(driver = device->driver)) | |
d550d98d | 588 | return 0; |
3fb02738 | 589 | |
1da177e4 LT |
590 | if (driver->ops.start) { |
591 | result = driver->ops.start(device); | |
592 | if (result && driver->ops.remove) | |
593 | driver->ops.remove(device, ACPI_BUS_REMOVAL_NORMAL); | |
1da177e4 LT |
594 | } |
595 | ||
d550d98d | 596 | return result; |
1da177e4 LT |
597 | } |
598 | ||
9e89dde2 ZR |
599 | /** |
600 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
601 | * @driver: driver being registered | |
602 | * | |
603 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
604 | * devices that match the driver's criteria and binds. Returns zero for | |
605 | * success or a negative error status for failure. | |
606 | */ | |
607 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
1da177e4 | 608 | { |
1890a97a | 609 | int ret; |
1da177e4 | 610 | |
9e89dde2 ZR |
611 | if (acpi_disabled) |
612 | return -ENODEV; | |
1890a97a PM |
613 | driver->drv.name = driver->name; |
614 | driver->drv.bus = &acpi_bus_type; | |
615 | driver->drv.owner = driver->owner; | |
1da177e4 | 616 | |
1890a97a PM |
617 | ret = driver_register(&driver->drv); |
618 | return ret; | |
9e89dde2 | 619 | } |
1da177e4 | 620 | |
9e89dde2 ZR |
621 | EXPORT_SYMBOL(acpi_bus_register_driver); |
622 | ||
623 | /** | |
624 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus | |
625 | * @driver: driver to unregister | |
626 | * | |
627 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
628 | * devices that match the driver's criteria and unbinds. | |
629 | */ | |
630 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
631 | { | |
1890a97a | 632 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
633 | } |
634 | ||
635 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
636 | ||
9e89dde2 ZR |
637 | /* -------------------------------------------------------------------------- |
638 | Device Enumeration | |
639 | -------------------------------------------------------------------------- */ | |
5c478f49 BH |
640 | static struct acpi_device *acpi_bus_get_parent(acpi_handle handle) |
641 | { | |
642 | acpi_status status; | |
643 | int ret; | |
644 | struct acpi_device *device; | |
645 | ||
646 | /* | |
647 | * Fixed hardware devices do not appear in the namespace and do not | |
648 | * have handles, but we fabricate acpi_devices for them, so we have | |
649 | * to deal with them specially. | |
650 | */ | |
651 | if (handle == NULL) | |
652 | return acpi_root; | |
653 | ||
654 | do { | |
655 | status = acpi_get_parent(handle, &handle); | |
656 | if (status == AE_NULL_ENTRY) | |
657 | return NULL; | |
658 | if (ACPI_FAILURE(status)) | |
659 | return acpi_root; | |
660 | ||
661 | ret = acpi_bus_get_device(handle, &device); | |
662 | if (ret == 0) | |
663 | return device; | |
664 | } while (1); | |
665 | } | |
666 | ||
9e89dde2 ZR |
667 | acpi_status |
668 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
669 | { | |
670 | acpi_status status; | |
671 | acpi_handle tmp; | |
672 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
673 | union acpi_object *obj; | |
674 | ||
675 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
676 | if (ACPI_FAILURE(status)) | |
677 | return status; | |
678 | ||
679 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
680 | if (ACPI_SUCCESS(status)) { | |
681 | obj = buffer.pointer; | |
3b5fee59 HM |
682 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
683 | ejd); | |
9e89dde2 ZR |
684 | kfree(buffer.pointer); |
685 | } | |
686 | return status; | |
687 | } | |
688 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
689 | ||
8e4319c4 | 690 | void acpi_bus_data_handler(acpi_handle handle, void *context) |
9e89dde2 ZR |
691 | { |
692 | ||
693 | /* TBD */ | |
694 | ||
695 | return; | |
696 | } | |
697 | ||
9e89dde2 ZR |
698 | static int acpi_bus_get_perf_flags(struct acpi_device *device) |
699 | { | |
700 | device->performance.state = ACPI_STATE_UNKNOWN; | |
701 | return 0; | |
702 | } | |
703 | ||
704 | static acpi_status | |
705 | acpi_bus_extract_wakeup_device_power_package(struct acpi_device *device, | |
706 | union acpi_object *package) | |
707 | { | |
708 | int i = 0; | |
709 | union acpi_object *element = NULL; | |
710 | ||
711 | if (!device || !package || (package->package.count < 2)) | |
712 | return AE_BAD_PARAMETER; | |
713 | ||
714 | element = &(package->package.elements[0]); | |
715 | if (!element) | |
716 | return AE_BAD_PARAMETER; | |
717 | if (element->type == ACPI_TYPE_PACKAGE) { | |
718 | if ((element->package.count < 2) || | |
719 | (element->package.elements[0].type != | |
720 | ACPI_TYPE_LOCAL_REFERENCE) | |
721 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) | |
722 | return AE_BAD_DATA; | |
723 | device->wakeup.gpe_device = | |
724 | element->package.elements[0].reference.handle; | |
725 | device->wakeup.gpe_number = | |
726 | (u32) element->package.elements[1].integer.value; | |
727 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
728 | device->wakeup.gpe_number = element->integer.value; | |
729 | } else | |
730 | return AE_BAD_DATA; | |
731 | ||
732 | element = &(package->package.elements[1]); | |
733 | if (element->type != ACPI_TYPE_INTEGER) { | |
734 | return AE_BAD_DATA; | |
735 | } | |
736 | device->wakeup.sleep_state = element->integer.value; | |
737 | ||
738 | if ((package->package.count - 2) > ACPI_MAX_HANDLES) { | |
739 | return AE_NO_MEMORY; | |
740 | } | |
741 | device->wakeup.resources.count = package->package.count - 2; | |
742 | for (i = 0; i < device->wakeup.resources.count; i++) { | |
743 | element = &(package->package.elements[i + 2]); | |
cd0b2248 | 744 | if (element->type != ACPI_TYPE_LOCAL_REFERENCE) |
9e89dde2 | 745 | return AE_BAD_DATA; |
9e89dde2 ZR |
746 | |
747 | device->wakeup.resources.handles[i] = element->reference.handle; | |
1da177e4 | 748 | } |
9e89dde2 ZR |
749 | |
750 | return AE_OK; | |
1da177e4 LT |
751 | } |
752 | ||
9e89dde2 | 753 | static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
1da177e4 | 754 | { |
9e89dde2 ZR |
755 | acpi_status status = 0; |
756 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
757 | union acpi_object *package = NULL; | |
77e76609 | 758 | int psw_error; |
1da177e4 | 759 | |
29b71a1c TR |
760 | struct acpi_device_id button_device_ids[] = { |
761 | {"PNP0C0D", 0}, | |
762 | {"PNP0C0C", 0}, | |
763 | {"PNP0C0E", 0}, | |
764 | {"", 0}, | |
765 | }; | |
766 | ||
9e89dde2 ZR |
767 | /* _PRW */ |
768 | status = acpi_evaluate_object(device->handle, "_PRW", NULL, &buffer); | |
769 | if (ACPI_FAILURE(status)) { | |
770 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
771 | goto end; | |
1da177e4 | 772 | } |
1da177e4 | 773 | |
9e89dde2 ZR |
774 | package = (union acpi_object *)buffer.pointer; |
775 | status = acpi_bus_extract_wakeup_device_power_package(device, package); | |
776 | if (ACPI_FAILURE(status)) { | |
777 | ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package")); | |
778 | goto end; | |
779 | } | |
1da177e4 | 780 | |
9e89dde2 | 781 | kfree(buffer.pointer); |
1da177e4 | 782 | |
9e89dde2 | 783 | device->wakeup.flags.valid = 1; |
9b83ccd2 | 784 | device->wakeup.prepare_count = 0; |
729b2bdb ZY |
785 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
786 | * system for the ACPI device with the _PRW object. | |
787 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. | |
788 | * So it is necessary to call _DSW object first. Only when it is not | |
789 | * present will the _PSW object used. | |
790 | */ | |
77e76609 RW |
791 | psw_error = acpi_device_sleep_wake(device, 0, 0, 0); |
792 | if (psw_error) | |
793 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
794 | "error in _DSW or _PSW evaluation\n")); | |
795 | ||
9e89dde2 | 796 | /* Power button, Lid switch always enable wakeup */ |
29b71a1c | 797 | if (!acpi_match_device_ids(device, button_device_ids)) |
9e89dde2 | 798 | device->wakeup.flags.run_wake = 1; |
1da177e4 | 799 | |
0c526d96 | 800 | end: |
9e89dde2 ZR |
801 | if (ACPI_FAILURE(status)) |
802 | device->flags.wake_capable = 0; | |
d550d98d | 803 | return 0; |
1da177e4 | 804 | } |
1da177e4 | 805 | |
9e89dde2 | 806 | static int acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 807 | { |
9e89dde2 ZR |
808 | acpi_status status = 0; |
809 | acpi_handle handle = NULL; | |
810 | u32 i = 0; | |
1a365616 | 811 | |
4be44fcd | 812 | |
9e89dde2 ZR |
813 | /* |
814 | * Power Management Flags | |
815 | */ | |
816 | status = acpi_get_handle(device->handle, "_PSC", &handle); | |
817 | if (ACPI_SUCCESS(status)) | |
818 | device->power.flags.explicit_get = 1; | |
819 | status = acpi_get_handle(device->handle, "_IRC", &handle); | |
820 | if (ACPI_SUCCESS(status)) | |
821 | device->power.flags.inrush_current = 1; | |
1da177e4 | 822 | |
9e89dde2 ZR |
823 | /* |
824 | * Enumerate supported power management states | |
825 | */ | |
826 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3; i++) { | |
827 | struct acpi_device_power_state *ps = &device->power.states[i]; | |
828 | char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' }; | |
1da177e4 | 829 | |
9e89dde2 ZR |
830 | /* Evaluate "_PRx" to se if power resources are referenced */ |
831 | acpi_evaluate_reference(device->handle, object_name, NULL, | |
832 | &ps->resources); | |
833 | if (ps->resources.count) { | |
834 | device->power.flags.power_resources = 1; | |
835 | ps->flags.valid = 1; | |
1da177e4 | 836 | } |
1da177e4 | 837 | |
9e89dde2 ZR |
838 | /* Evaluate "_PSx" to see if we can do explicit sets */ |
839 | object_name[2] = 'S'; | |
840 | status = acpi_get_handle(device->handle, object_name, &handle); | |
841 | if (ACPI_SUCCESS(status)) { | |
842 | ps->flags.explicit_set = 1; | |
843 | ps->flags.valid = 1; | |
1da177e4 | 844 | } |
1da177e4 | 845 | |
9e89dde2 ZR |
846 | /* State is valid if we have some power control */ |
847 | if (ps->resources.count || ps->flags.explicit_set) | |
848 | ps->flags.valid = 1; | |
1da177e4 | 849 | |
9e89dde2 ZR |
850 | ps->power = -1; /* Unknown - driver assigned */ |
851 | ps->latency = -1; /* Unknown - driver assigned */ | |
852 | } | |
1da177e4 | 853 | |
9e89dde2 ZR |
854 | /* Set defaults for D0 and D3 states (always valid) */ |
855 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
856 | device->power.states[ACPI_STATE_D0].power = 100; | |
857 | device->power.states[ACPI_STATE_D3].flags.valid = 1; | |
858 | device->power.states[ACPI_STATE_D3].power = 0; | |
c8f7a62c | 859 | |
9e89dde2 | 860 | /* TBD: System wake support and resource requirements. */ |
c8f7a62c | 861 | |
9e89dde2 | 862 | device->power.state = ACPI_STATE_UNKNOWN; |
a51e145f | 863 | acpi_bus_get_power(device->handle, &(device->power.state)); |
c8f7a62c | 864 | |
9e89dde2 ZR |
865 | return 0; |
866 | } | |
c8f7a62c | 867 | |
4be44fcd | 868 | static int acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 869 | { |
4be44fcd LB |
870 | acpi_status status = AE_OK; |
871 | acpi_handle temp = NULL; | |
1da177e4 | 872 | |
1da177e4 LT |
873 | |
874 | /* Presence of _STA indicates 'dynamic_status' */ | |
875 | status = acpi_get_handle(device->handle, "_STA", &temp); | |
876 | if (ACPI_SUCCESS(status)) | |
877 | device->flags.dynamic_status = 1; | |
878 | ||
1da177e4 LT |
879 | /* Presence of _RMV indicates 'removable' */ |
880 | status = acpi_get_handle(device->handle, "_RMV", &temp); | |
881 | if (ACPI_SUCCESS(status)) | |
882 | device->flags.removable = 1; | |
883 | ||
884 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
885 | status = acpi_get_handle(device->handle, "_EJD", &temp); | |
886 | if (ACPI_SUCCESS(status)) | |
887 | device->flags.ejectable = 1; | |
888 | else { | |
889 | status = acpi_get_handle(device->handle, "_EJ0", &temp); | |
890 | if (ACPI_SUCCESS(status)) | |
891 | device->flags.ejectable = 1; | |
892 | } | |
893 | ||
894 | /* Presence of _LCK indicates 'lockable' */ | |
895 | status = acpi_get_handle(device->handle, "_LCK", &temp); | |
896 | if (ACPI_SUCCESS(status)) | |
897 | device->flags.lockable = 1; | |
898 | ||
899 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ | |
900 | status = acpi_get_handle(device->handle, "_PS0", &temp); | |
901 | if (ACPI_FAILURE(status)) | |
902 | status = acpi_get_handle(device->handle, "_PR0", &temp); | |
903 | if (ACPI_SUCCESS(status)) | |
904 | device->flags.power_manageable = 1; | |
905 | ||
906 | /* Presence of _PRW indicates wake capable */ | |
907 | status = acpi_get_handle(device->handle, "_PRW", &temp); | |
908 | if (ACPI_SUCCESS(status)) | |
909 | device->flags.wake_capable = 1; | |
910 | ||
3c5f9be4 | 911 | /* TBD: Performance management */ |
1da177e4 | 912 | |
d550d98d | 913 | return 0; |
1da177e4 LT |
914 | } |
915 | ||
c7bcb4e9 | 916 | static void acpi_device_get_busid(struct acpi_device *device) |
1da177e4 | 917 | { |
4be44fcd LB |
918 | char bus_id[5] = { '?', 0 }; |
919 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
920 | int i = 0; | |
1da177e4 LT |
921 | |
922 | /* | |
923 | * Bus ID | |
924 | * ------ | |
925 | * The device's Bus ID is simply the object name. | |
926 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
927 | */ | |
859ac9a4 | 928 | if (ACPI_IS_ROOT_DEVICE(device)) { |
1da177e4 | 929 | strcpy(device->pnp.bus_id, "ACPI"); |
859ac9a4 BH |
930 | return; |
931 | } | |
932 | ||
933 | switch (device->device_type) { | |
1da177e4 LT |
934 | case ACPI_BUS_TYPE_POWER_BUTTON: |
935 | strcpy(device->pnp.bus_id, "PWRF"); | |
936 | break; | |
937 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
938 | strcpy(device->pnp.bus_id, "SLPF"); | |
939 | break; | |
940 | default: | |
66b7ed40 | 941 | acpi_get_name(device->handle, ACPI_SINGLE_NAME, &buffer); |
1da177e4 LT |
942 | /* Clean up trailing underscores (if any) */ |
943 | for (i = 3; i > 1; i--) { | |
944 | if (bus_id[i] == '_') | |
945 | bus_id[i] = '\0'; | |
946 | else | |
947 | break; | |
948 | } | |
949 | strcpy(device->pnp.bus_id, bus_id); | |
950 | break; | |
951 | } | |
952 | } | |
953 | ||
54735266 ZR |
954 | /* |
955 | * acpi_bay_match - see if a device is an ejectable driver bay | |
956 | * | |
957 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
958 | * then we can safely call it an ejectable drive bay | |
959 | */ | |
960 | static int acpi_bay_match(struct acpi_device *device){ | |
961 | acpi_status status; | |
962 | acpi_handle handle; | |
963 | acpi_handle tmp; | |
964 | acpi_handle phandle; | |
965 | ||
966 | handle = device->handle; | |
967 | ||
968 | status = acpi_get_handle(handle, "_EJ0", &tmp); | |
969 | if (ACPI_FAILURE(status)) | |
970 | return -ENODEV; | |
971 | ||
972 | if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || | |
973 | (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || | |
974 | (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || | |
975 | (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) | |
976 | return 0; | |
977 | ||
978 | if (acpi_get_parent(handle, &phandle)) | |
979 | return -ENODEV; | |
980 | ||
981 | if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) || | |
982 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) || | |
983 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) || | |
984 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp)))) | |
985 | return 0; | |
986 | ||
987 | return -ENODEV; | |
988 | } | |
989 | ||
3620f2f2 FS |
990 | /* |
991 | * acpi_dock_match - see if a device has a _DCK method | |
992 | */ | |
993 | static int acpi_dock_match(struct acpi_device *device) | |
994 | { | |
995 | acpi_handle tmp; | |
996 | return acpi_get_handle(device->handle, "_DCK", &tmp); | |
997 | } | |
998 | ||
7f47fa6c | 999 | char *acpi_device_hid(struct acpi_device *device) |
15b8dd53 | 1000 | { |
7f47fa6c | 1001 | struct acpi_hardware_id *hid; |
15b8dd53 | 1002 | |
7f47fa6c BH |
1003 | hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list); |
1004 | return hid->id; | |
1005 | } | |
1006 | EXPORT_SYMBOL(acpi_device_hid); | |
15b8dd53 | 1007 | |
7f47fa6c BH |
1008 | static void acpi_add_id(struct acpi_device *device, const char *dev_id) |
1009 | { | |
1010 | struct acpi_hardware_id *id; | |
15b8dd53 | 1011 | |
7f47fa6c BH |
1012 | id = kmalloc(sizeof(*id), GFP_KERNEL); |
1013 | if (!id) | |
1014 | return; | |
15b8dd53 | 1015 | |
7f47fa6c BH |
1016 | id->id = kmalloc(strlen(dev_id) + 1, GFP_KERNEL); |
1017 | if (!id->id) { | |
1018 | kfree(id); | |
1019 | return; | |
15b8dd53 BM |
1020 | } |
1021 | ||
7f47fa6c BH |
1022 | strcpy(id->id, dev_id); |
1023 | list_add_tail(&id->list, &device->pnp.ids); | |
15b8dd53 BM |
1024 | } |
1025 | ||
c7bcb4e9 | 1026 | static void acpi_device_set_id(struct acpi_device *device) |
1da177e4 | 1027 | { |
15b8dd53 | 1028 | struct acpi_device_info *info = NULL; |
4be44fcd LB |
1029 | char *hid = NULL; |
1030 | char *uid = NULL; | |
15b8dd53 BM |
1031 | struct acpica_device_id_list *cid_list = NULL; |
1032 | char *cid_add = NULL; | |
4be44fcd | 1033 | acpi_status status; |
7f47fa6c | 1034 | int i; |
1da177e4 | 1035 | |
c7bcb4e9 | 1036 | switch (device->device_type) { |
1da177e4 | 1037 | case ACPI_BUS_TYPE_DEVICE: |
859ac9a4 BH |
1038 | if (ACPI_IS_ROOT_DEVICE(device)) { |
1039 | hid = ACPI_SYSTEM_HID; | |
1040 | break; | |
78b8e141 BH |
1041 | } else if (ACPI_IS_ROOT_DEVICE(device->parent)) { |
1042 | /* \_SB_, the only root-level namespace device */ | |
1043 | hid = ACPI_BUS_HID; | |
1044 | strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME); | |
1045 | strcpy(device->pnp.device_class, ACPI_BUS_CLASS); | |
1046 | break; | |
859ac9a4 BH |
1047 | } |
1048 | ||
66b7ed40 | 1049 | status = acpi_get_object_info(device->handle, &info); |
1da177e4 | 1050 | if (ACPI_FAILURE(status)) { |
96b2dd1f | 1051 | printk(KERN_ERR PREFIX "%s: Error reading device info\n", __func__); |
1da177e4 LT |
1052 | return; |
1053 | } | |
1054 | ||
1da177e4 | 1055 | if (info->valid & ACPI_VALID_HID) |
15b8dd53 | 1056 | hid = info->hardware_id.string; |
1da177e4 | 1057 | if (info->valid & ACPI_VALID_UID) |
15b8dd53 | 1058 | uid = info->unique_id.string; |
1da177e4 | 1059 | if (info->valid & ACPI_VALID_CID) |
15b8dd53 | 1060 | cid_list = &info->compatible_id_list; |
1da177e4 LT |
1061 | if (info->valid & ACPI_VALID_ADR) { |
1062 | device->pnp.bus_address = info->address; | |
1063 | device->flags.bus_address = 1; | |
1064 | } | |
ae843332 | 1065 | |
3620f2f2 FS |
1066 | /* If we have a video/bay/dock device, add our selfdefined |
1067 | HID to the CID list. Like that the video/bay/dock drivers | |
1068 | will get autoloaded and the device might still match | |
1069 | against another driver. | |
1070 | */ | |
c3d6de69 | 1071 | if (acpi_is_video_device(device)) |
3620f2f2 FS |
1072 | cid_add = ACPI_VIDEO_HID; |
1073 | else if (ACPI_SUCCESS(acpi_bay_match(device))) | |
1074 | cid_add = ACPI_BAY_HID; | |
1075 | else if (ACPI_SUCCESS(acpi_dock_match(device))) | |
1076 | cid_add = ACPI_DOCK_HID; | |
54735266 | 1077 | |
1da177e4 LT |
1078 | break; |
1079 | case ACPI_BUS_TYPE_POWER: | |
1080 | hid = ACPI_POWER_HID; | |
1081 | break; | |
1082 | case ACPI_BUS_TYPE_PROCESSOR: | |
ad93a765 | 1083 | hid = ACPI_PROCESSOR_OBJECT_HID; |
1da177e4 | 1084 | break; |
1da177e4 LT |
1085 | case ACPI_BUS_TYPE_THERMAL: |
1086 | hid = ACPI_THERMAL_HID; | |
1087 | break; | |
1088 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
1089 | hid = ACPI_BUTTON_HID_POWERF; | |
1090 | break; | |
1091 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
1092 | hid = ACPI_BUTTON_HID_SLEEPF; | |
1093 | break; | |
1094 | } | |
1095 | ||
b1fbfb2a BH |
1096 | /* |
1097 | * We build acpi_devices for some objects that don't have _HID or _CID, | |
1098 | * e.g., PCI bridges and slots. Drivers can't bind to these objects, | |
1099 | * but we do use them indirectly by traversing the acpi_device tree. | |
1100 | * This generic ID isn't useful for driver binding, but it provides | |
1101 | * the useful property that "every acpi_device has an ID." | |
1102 | */ | |
1103 | if (!hid && !cid_list && !cid_add) | |
1104 | hid = "device"; | |
1105 | ||
1da177e4 | 1106 | if (hid) { |
7f47fa6c BH |
1107 | acpi_add_id(device, hid); |
1108 | device->flags.hardware_id = 1; | |
1da177e4 LT |
1109 | } |
1110 | if (uid) { | |
15b8dd53 BM |
1111 | device->pnp.unique_id = ACPI_ALLOCATE_ZEROED(strlen (uid) + 1); |
1112 | if (device->pnp.unique_id) { | |
1113 | strcpy(device->pnp.unique_id, uid); | |
1114 | device->flags.unique_id = 1; | |
1115 | } | |
1da177e4 | 1116 | } |
718fb0de HD |
1117 | if (!device->flags.unique_id) |
1118 | device->pnp.unique_id = ""; | |
15b8dd53 | 1119 | |
7f47fa6c BH |
1120 | if (cid_list) |
1121 | for (i = 0; i < cid_list->count; i++) | |
1122 | acpi_add_id(device, cid_list->ids[i].string); | |
b2972f87 | 1123 | if (cid_add) |
7f47fa6c | 1124 | acpi_add_id(device, cid_add); |
1da177e4 | 1125 | |
15b8dd53 | 1126 | kfree(info); |
1da177e4 LT |
1127 | } |
1128 | ||
bc3b0772 | 1129 | static int acpi_device_set_context(struct acpi_device *device) |
1da177e4 | 1130 | { |
bc3b0772 BH |
1131 | acpi_status status; |
1132 | ||
1da177e4 LT |
1133 | /* |
1134 | * Context | |
1135 | * ------- | |
1136 | * Attach this 'struct acpi_device' to the ACPI object. This makes | |
bc3b0772 BH |
1137 | * resolutions from handle->device very efficient. Fixed hardware |
1138 | * devices have no handles, so we skip them. | |
1da177e4 | 1139 | */ |
bc3b0772 BH |
1140 | if (!device->handle) |
1141 | return 0; | |
1da177e4 | 1142 | |
bc3b0772 BH |
1143 | status = acpi_attach_data(device->handle, |
1144 | acpi_bus_data_handler, device); | |
1145 | if (ACPI_SUCCESS(status)) | |
1146 | return 0; | |
1147 | ||
1148 | printk(KERN_ERR PREFIX "Error attaching device data\n"); | |
1149 | return -ENODEV; | |
1da177e4 LT |
1150 | } |
1151 | ||
4be44fcd | 1152 | static int acpi_bus_remove(struct acpi_device *dev, int rmdevice) |
1da177e4 | 1153 | { |
1da177e4 | 1154 | if (!dev) |
d550d98d | 1155 | return -EINVAL; |
1da177e4 | 1156 | |
96333578 | 1157 | dev->removal_type = ACPI_BUS_REMOVAL_EJECT; |
1890a97a | 1158 | device_release_driver(&dev->dev); |
1da177e4 LT |
1159 | |
1160 | if (!rmdevice) | |
d550d98d | 1161 | return 0; |
1da177e4 | 1162 | |
2786f6e3 RZ |
1163 | /* |
1164 | * unbind _ADR-Based Devices when hot removal | |
1165 | */ | |
1da177e4 LT |
1166 | if (dev->flags.bus_address) { |
1167 | if ((dev->parent) && (dev->parent->ops.unbind)) | |
1168 | dev->parent->ops.unbind(dev); | |
1169 | } | |
1da177e4 LT |
1170 | acpi_device_unregister(dev, ACPI_BUS_REMOVAL_EJECT); |
1171 | ||
d550d98d | 1172 | return 0; |
1da177e4 LT |
1173 | } |
1174 | ||
5c478f49 BH |
1175 | static int acpi_add_single_object(struct acpi_device **child, |
1176 | acpi_handle handle, int type, | |
778cbc1d | 1177 | unsigned long long sta, |
5c478f49 | 1178 | struct acpi_bus_ops *ops) |
1da177e4 | 1179 | { |
77c24888 BH |
1180 | int result; |
1181 | struct acpi_device *device; | |
29aaefa6 | 1182 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 1183 | |
36bcbec7 | 1184 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 1185 | if (!device) { |
6468463a | 1186 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 1187 | return -ENOMEM; |
1da177e4 | 1188 | } |
1da177e4 | 1189 | |
7f47fa6c | 1190 | INIT_LIST_HEAD(&device->pnp.ids); |
caaa6efb | 1191 | device->device_type = type; |
1da177e4 | 1192 | device->handle = handle; |
5c478f49 | 1193 | device->parent = acpi_bus_get_parent(handle); |
c4168bff | 1194 | device->bus_ops = *ops; /* workround for not call .start */ |
778cbc1d | 1195 | STRUCT_TO_INT(device->status) = sta; |
c4168bff | 1196 | |
c7bcb4e9 | 1197 | acpi_device_get_busid(device); |
1da177e4 LT |
1198 | |
1199 | /* | |
1200 | * Flags | |
1201 | * ----- | |
778cbc1d BH |
1202 | * Note that we only look for object handles -- cannot evaluate objects |
1203 | * until we know the device is present and properly initialized. | |
1da177e4 LT |
1204 | */ |
1205 | result = acpi_bus_get_flags(device); | |
1206 | if (result) | |
1207 | goto end; | |
1208 | ||
1da177e4 LT |
1209 | /* |
1210 | * Initialize Device | |
1211 | * ----------------- | |
1212 | * TBD: Synch with Core's enumeration/initialization process. | |
1213 | */ | |
1214 | ||
1215 | /* | |
1216 | * Hardware ID, Unique ID, & Bus Address | |
1217 | * ------------------------------------- | |
1218 | */ | |
c7bcb4e9 | 1219 | acpi_device_set_id(device); |
1da177e4 LT |
1220 | |
1221 | /* | |
1222 | * Power Management | |
1223 | * ---------------- | |
1224 | */ | |
1225 | if (device->flags.power_manageable) { | |
1226 | result = acpi_bus_get_power_flags(device); | |
1227 | if (result) | |
1228 | goto end; | |
1229 | } | |
1230 | ||
4be44fcd | 1231 | /* |
1da177e4 LT |
1232 | * Wakeup device management |
1233 | *----------------------- | |
1234 | */ | |
1235 | if (device->flags.wake_capable) { | |
1236 | result = acpi_bus_get_wakeup_device_flags(device); | |
1237 | if (result) | |
1238 | goto end; | |
1239 | } | |
1240 | ||
1241 | /* | |
1242 | * Performance Management | |
1243 | * ---------------------- | |
1244 | */ | |
1245 | if (device->flags.performance_manageable) { | |
1246 | result = acpi_bus_get_perf_flags(device); | |
1247 | if (result) | |
1248 | goto end; | |
1249 | } | |
1250 | ||
bc3b0772 | 1251 | if ((result = acpi_device_set_context(device))) |
f61f9258 | 1252 | goto end; |
1da177e4 | 1253 | |
66b7ed40 | 1254 | result = acpi_device_register(device); |
1da177e4 LT |
1255 | |
1256 | /* | |
2786f6e3 | 1257 | * Bind _ADR-Based Devices when hot add |
1da177e4 LT |
1258 | */ |
1259 | if (device->flags.bus_address) { | |
1260 | if (device->parent && device->parent->ops.bind) | |
1261 | device->parent->ops.bind(device); | |
1262 | } | |
1263 | ||
0c526d96 | 1264 | end: |
29aaefa6 BH |
1265 | if (!result) { |
1266 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1267 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
1268 | "Adding %s [%s] parent %s\n", dev_name(&device->dev), | |
1269 | (char *) buffer.pointer, | |
1270 | device->parent ? dev_name(&device->parent->dev) : | |
1271 | "(null)")); | |
1272 | kfree(buffer.pointer); | |
1da177e4 | 1273 | *child = device; |
29aaefa6 | 1274 | } else |
718fb0de | 1275 | acpi_device_release(&device->dev); |
1da177e4 | 1276 | |
d550d98d | 1277 | return result; |
1da177e4 | 1278 | } |
1da177e4 | 1279 | |
778cbc1d BH |
1280 | #define ACPI_STA_DEFAULT (ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | \ |
1281 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING) | |
1282 | ||
1283 | static int acpi_bus_type_and_status(acpi_handle handle, int *type, | |
1284 | unsigned long long *sta) | |
1da177e4 | 1285 | { |
778cbc1d BH |
1286 | acpi_status status; |
1287 | acpi_object_type acpi_type; | |
1da177e4 | 1288 | |
778cbc1d | 1289 | status = acpi_get_type(handle, &acpi_type); |
51a85faf | 1290 | if (ACPI_FAILURE(status)) |
778cbc1d | 1291 | return -ENODEV; |
4be44fcd | 1292 | |
778cbc1d | 1293 | switch (acpi_type) { |
51a85faf BH |
1294 | case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */ |
1295 | case ACPI_TYPE_DEVICE: | |
778cbc1d BH |
1296 | *type = ACPI_BUS_TYPE_DEVICE; |
1297 | status = acpi_bus_get_status_handle(handle, sta); | |
1298 | if (ACPI_FAILURE(status)) | |
1299 | return -ENODEV; | |
51a85faf BH |
1300 | break; |
1301 | case ACPI_TYPE_PROCESSOR: | |
778cbc1d BH |
1302 | *type = ACPI_BUS_TYPE_PROCESSOR; |
1303 | status = acpi_bus_get_status_handle(handle, sta); | |
1304 | if (ACPI_FAILURE(status)) | |
1305 | return -ENODEV; | |
51a85faf BH |
1306 | break; |
1307 | case ACPI_TYPE_THERMAL: | |
778cbc1d BH |
1308 | *type = ACPI_BUS_TYPE_THERMAL; |
1309 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1310 | break; |
1311 | case ACPI_TYPE_POWER: | |
778cbc1d BH |
1312 | *type = ACPI_BUS_TYPE_POWER; |
1313 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1314 | break; |
1315 | default: | |
778cbc1d | 1316 | return -ENODEV; |
51a85faf | 1317 | } |
1da177e4 | 1318 | |
778cbc1d BH |
1319 | return 0; |
1320 | } | |
1321 | ||
1322 | static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl, | |
1323 | void *context, void **return_value) | |
1324 | { | |
1325 | struct acpi_bus_ops *ops = context; | |
778cbc1d BH |
1326 | int type; |
1327 | unsigned long long sta; | |
e3b87f8a BH |
1328 | struct acpi_device *device; |
1329 | acpi_status status; | |
778cbc1d BH |
1330 | int result; |
1331 | ||
1332 | result = acpi_bus_type_and_status(handle, &type, &sta); | |
1333 | if (result) | |
1334 | return AE_OK; | |
1335 | ||
1336 | if (!(sta & ACPI_STA_DEVICE_PRESENT) && | |
1337 | !(sta & ACPI_STA_DEVICE_FUNCTIONING)) | |
1338 | return AE_CTRL_DEPTH; | |
1339 | ||
e3b87f8a BH |
1340 | /* |
1341 | * We may already have an acpi_device from a previous enumeration. If | |
1342 | * so, we needn't add it again, but we may still have to start it. | |
1343 | */ | |
1344 | device = NULL; | |
1345 | acpi_bus_get_device(handle, &device); | |
1346 | if (ops->acpi_op_add && !device) | |
1347 | acpi_add_single_object(&device, handle, type, sta, ops); | |
1da177e4 | 1348 | |
e3b87f8a | 1349 | if (!device) |
51a85faf | 1350 | return AE_CTRL_DEPTH; |
1da177e4 | 1351 | |
51a85faf BH |
1352 | if (ops->acpi_op_start && !(ops->acpi_op_add)) { |
1353 | status = acpi_start_single_object(device); | |
1da177e4 | 1354 | if (ACPI_FAILURE(status)) |
51a85faf BH |
1355 | return AE_CTRL_DEPTH; |
1356 | } | |
1da177e4 | 1357 | |
51a85faf BH |
1358 | if (!*return_value) |
1359 | *return_value = device; | |
1360 | return AE_OK; | |
1361 | } | |
3fb02738 | 1362 | |
51a85faf BH |
1363 | static int acpi_bus_scan(acpi_handle handle, struct acpi_bus_ops *ops, |
1364 | struct acpi_device **child) | |
1365 | { | |
1366 | acpi_status status; | |
1367 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
1368 | void *device = NULL; | |
3fb02738 | 1369 | |
51a85faf BH |
1370 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); |
1371 | printk(KERN_INFO PREFIX "Enumerating devices from [%s]\n", | |
1372 | (char *) buffer.pointer); | |
1da177e4 | 1373 | |
51a85faf BH |
1374 | status = acpi_bus_check_add(handle, 0, ops, &device); |
1375 | if (ACPI_SUCCESS(status)) | |
1376 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
1377 | acpi_bus_check_add, ops, &device); | |
1da177e4 | 1378 | |
51a85faf BH |
1379 | if (child) |
1380 | *child = device; | |
d550d98d | 1381 | return 0; |
1da177e4 | 1382 | } |
1da177e4 | 1383 | |
3fb02738 | 1384 | int |
4be44fcd LB |
1385 | acpi_bus_add(struct acpi_device **child, |
1386 | struct acpi_device *parent, acpi_handle handle, int type) | |
3fb02738 | 1387 | { |
3fb02738 RS |
1388 | struct acpi_bus_ops ops; |
1389 | ||
c4168bff LS |
1390 | memset(&ops, 0, sizeof(ops)); |
1391 | ops.acpi_op_add = 1; | |
3fb02738 | 1392 | |
51a85faf BH |
1393 | acpi_bus_scan(handle, &ops, child); |
1394 | return 0; | |
3fb02738 RS |
1395 | } |
1396 | EXPORT_SYMBOL(acpi_bus_add); | |
1397 | ||
4be44fcd | 1398 | int acpi_bus_start(struct acpi_device *device) |
3fb02738 | 1399 | { |
3fb02738 RS |
1400 | struct acpi_bus_ops ops; |
1401 | ||
8e029bf0 BH |
1402 | memset(&ops, 0, sizeof(ops)); |
1403 | ops.acpi_op_start = 1; | |
3fb02738 | 1404 | |
51a85faf BH |
1405 | acpi_bus_scan(device->handle, &ops, NULL); |
1406 | return 0; | |
3fb02738 RS |
1407 | } |
1408 | EXPORT_SYMBOL(acpi_bus_start); | |
1da177e4 | 1409 | |
ceaba663 | 1410 | int acpi_bus_trim(struct acpi_device *start, int rmdevice) |
1da177e4 | 1411 | { |
4be44fcd LB |
1412 | acpi_status status; |
1413 | struct acpi_device *parent, *child; | |
1414 | acpi_handle phandle, chandle; | |
1415 | acpi_object_type type; | |
1416 | u32 level = 1; | |
1417 | int err = 0; | |
1418 | ||
1419 | parent = start; | |
1da177e4 LT |
1420 | phandle = start->handle; |
1421 | child = chandle = NULL; | |
1422 | ||
1423 | while ((level > 0) && parent && (!err)) { | |
1424 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, | |
4be44fcd | 1425 | chandle, &chandle); |
1da177e4 LT |
1426 | |
1427 | /* | |
1428 | * If this scope is exhausted then move our way back up. | |
1429 | */ | |
1430 | if (ACPI_FAILURE(status)) { | |
1431 | level--; | |
1432 | chandle = phandle; | |
1433 | acpi_get_parent(phandle, &phandle); | |
1434 | child = parent; | |
1435 | parent = parent->parent; | |
1436 | ||
1437 | if (level == 0) | |
1438 | err = acpi_bus_remove(child, rmdevice); | |
1439 | else | |
1440 | err = acpi_bus_remove(child, 1); | |
1441 | ||
1442 | continue; | |
1443 | } | |
1444 | ||
1445 | status = acpi_get_type(chandle, &type); | |
1446 | if (ACPI_FAILURE(status)) { | |
1447 | continue; | |
1448 | } | |
1449 | /* | |
1450 | * If there is a device corresponding to chandle then | |
1451 | * parse it (depth-first). | |
1452 | */ | |
1453 | if (acpi_bus_get_device(chandle, &child) == 0) { | |
1454 | level++; | |
1455 | phandle = chandle; | |
1456 | chandle = NULL; | |
1457 | parent = child; | |
1458 | } | |
1459 | continue; | |
1460 | } | |
1461 | return err; | |
1462 | } | |
ceaba663 KA |
1463 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
1464 | ||
e8b945c9 | 1465 | static int acpi_bus_scan_fixed(void) |
1da177e4 | 1466 | { |
4be44fcd LB |
1467 | int result = 0; |
1468 | struct acpi_device *device = NULL; | |
c4168bff | 1469 | struct acpi_bus_ops ops; |
1da177e4 | 1470 | |
c4168bff LS |
1471 | memset(&ops, 0, sizeof(ops)); |
1472 | ops.acpi_op_add = 1; | |
1473 | ops.acpi_op_start = 1; | |
1474 | ||
1da177e4 LT |
1475 | /* |
1476 | * Enumerate all fixed-feature devices. | |
1477 | */ | |
cee324b1 | 1478 | if ((acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON) == 0) { |
5c478f49 | 1479 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1480 | ACPI_BUS_TYPE_POWER_BUTTON, |
778cbc1d | 1481 | ACPI_STA_DEFAULT, |
c4168bff | 1482 | &ops); |
3fb02738 | 1483 | } |
1da177e4 | 1484 | |
cee324b1 | 1485 | if ((acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON) == 0) { |
5c478f49 | 1486 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1487 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
778cbc1d | 1488 | ACPI_STA_DEFAULT, |
c4168bff | 1489 | &ops); |
3fb02738 | 1490 | } |
1da177e4 | 1491 | |
d550d98d | 1492 | return result; |
1da177e4 LT |
1493 | } |
1494 | ||
e747f274 | 1495 | int __init acpi_scan_init(void) |
1da177e4 LT |
1496 | { |
1497 | int result; | |
3fb02738 | 1498 | struct acpi_bus_ops ops; |
1da177e4 | 1499 | |
c4168bff LS |
1500 | memset(&ops, 0, sizeof(ops)); |
1501 | ops.acpi_op_add = 1; | |
1502 | ops.acpi_op_start = 1; | |
1da177e4 | 1503 | |
5b327265 PM |
1504 | result = bus_register(&acpi_bus_type); |
1505 | if (result) { | |
1506 | /* We don't want to quit even if we failed to add suspend/resume */ | |
1507 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
1508 | } | |
1509 | ||
1da177e4 LT |
1510 | /* |
1511 | * Enumerate devices in the ACPI namespace. | |
1512 | */ | |
51a85faf | 1513 | result = acpi_bus_scan(ACPI_ROOT_OBJECT, &ops, &acpi_root); |
c04209a7 | 1514 | |
c4168bff | 1515 | if (!result) |
adc08e20 | 1516 | result = acpi_bus_scan_fixed(); |
1da177e4 LT |
1517 | |
1518 | if (result) | |
1519 | acpi_device_unregister(acpi_root, ACPI_BUS_REMOVAL_NORMAL); | |
1520 | ||
d550d98d | 1521 | return result; |
1da177e4 | 1522 | } |