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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> | |
222e82ac | 11 | #include <linux/dmi.h> |
1da177e4 LT |
12 | |
13 | #include <acpi/acpi_drivers.h> | |
1da177e4 | 14 | |
e60cc7a6 BH |
15 | #include "internal.h" |
16 | ||
1da177e4 | 17 | #define _COMPONENT ACPI_BUS_COMPONENT |
f52fd66d | 18 | ACPI_MODULE_NAME("scan"); |
1da177e4 | 19 | #define STRUCT_TO_INT(s) (*((int*)&s)) |
4be44fcd | 20 | extern struct acpi_device *acpi_root; |
1da177e4 LT |
21 | |
22 | #define ACPI_BUS_CLASS "system_bus" | |
29b71a1c | 23 | #define ACPI_BUS_HID "LNXSYBUS" |
1da177e4 LT |
24 | #define ACPI_BUS_DEVICE_NAME "System Bus" |
25 | ||
859ac9a4 BH |
26 | #define ACPI_IS_ROOT_DEVICE(device) (!(device)->parent) |
27 | ||
1da177e4 | 28 | static LIST_HEAD(acpi_device_list); |
e49bd2dd | 29 | static LIST_HEAD(acpi_bus_id_list); |
9090589d | 30 | DEFINE_MUTEX(acpi_device_lock); |
1da177e4 LT |
31 | LIST_HEAD(acpi_wakeup_device_list); |
32 | ||
e49bd2dd | 33 | struct acpi_device_bus_id{ |
bb095854 | 34 | char bus_id[15]; |
e49bd2dd ZR |
35 | unsigned int instance_no; |
36 | struct list_head node; | |
1da177e4 | 37 | }; |
29b71a1c TR |
38 | |
39 | /* | |
40 | * Creates hid/cid(s) string needed for modalias and uevent | |
41 | * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: | |
42 | * char *modalias: "acpi:IBM0001:ACPI0001" | |
43 | */ | |
b3e572d2 AB |
44 | static int create_modalias(struct acpi_device *acpi_dev, char *modalias, |
45 | int size) | |
46 | { | |
29b71a1c | 47 | int len; |
5c9fcb5d | 48 | int count; |
7f47fa6c | 49 | struct acpi_hardware_id *id; |
29b71a1c | 50 | |
5c9fcb5d | 51 | len = snprintf(modalias, size, "acpi:"); |
29b71a1c TR |
52 | size -= len; |
53 | ||
7f47fa6c BH |
54 | list_for_each_entry(id, &acpi_dev->pnp.ids, list) { |
55 | count = snprintf(&modalias[len], size, "%s:", id->id); | |
5c9fcb5d ZR |
56 | if (count < 0 || count >= size) |
57 | return -EINVAL; | |
58 | len += count; | |
59 | size -= count; | |
60 | } | |
61 | ||
29b71a1c TR |
62 | modalias[len] = '\0'; |
63 | return len; | |
64 | } | |
65 | ||
66 | static ssize_t | |
67 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
68 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
69 | int len; | |
70 | ||
71 | /* Device has no HID and no CID or string is >1024 */ | |
72 | len = create_modalias(acpi_dev, buf, 1024); | |
73 | if (len <= 0) | |
74 | return 0; | |
75 | buf[len++] = '\n'; | |
76 | return len; | |
77 | } | |
78 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); | |
79 | ||
c8d72a5e | 80 | static void acpi_bus_hot_remove_device(void *context) |
1da177e4 | 81 | { |
26d46867 ZR |
82 | struct acpi_device *device; |
83 | acpi_handle handle = context; | |
1da177e4 LT |
84 | struct acpi_object_list arg_list; |
85 | union acpi_object arg; | |
86 | acpi_status status = AE_OK; | |
1da177e4 | 87 | |
26d46867 | 88 | if (acpi_bus_get_device(handle, &device)) |
c8d72a5e | 89 | return; |
26d46867 ZR |
90 | |
91 | if (!device) | |
c8d72a5e | 92 | return; |
26d46867 ZR |
93 | |
94 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
0794469d | 95 | "Hot-removing device %s...\n", dev_name(&device->dev))); |
26d46867 ZR |
96 | |
97 | if (acpi_bus_trim(device, 1)) { | |
55ac9a01 LM |
98 | printk(KERN_ERR PREFIX |
99 | "Removing device failed\n"); | |
c8d72a5e | 100 | return; |
26d46867 | 101 | } |
1da177e4 | 102 | |
26d46867 ZR |
103 | /* power off device */ |
104 | status = acpi_evaluate_object(handle, "_PS3", NULL, NULL); | |
105 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) | |
55ac9a01 LM |
106 | printk(KERN_WARNING PREFIX |
107 | "Power-off device failed\n"); | |
26d46867 ZR |
108 | |
109 | if (device->flags.lockable) { | |
1da177e4 LT |
110 | arg_list.count = 1; |
111 | arg_list.pointer = &arg; | |
112 | arg.type = ACPI_TYPE_INTEGER; | |
113 | arg.integer.value = 0; | |
114 | acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); | |
115 | } | |
1da177e4 | 116 | |
1da177e4 LT |
117 | arg_list.count = 1; |
118 | arg_list.pointer = &arg; | |
119 | arg.type = ACPI_TYPE_INTEGER; | |
120 | arg.integer.value = 1; | |
1da177e4 | 121 | |
1da177e4 LT |
122 | /* |
123 | * TBD: _EJD support. | |
124 | */ | |
1da177e4 | 125 | status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); |
26d46867 | 126 | if (ACPI_FAILURE(status)) |
c8d72a5e ZR |
127 | printk(KERN_WARNING PREFIX |
128 | "Eject device failed\n"); | |
1da177e4 | 129 | |
c8d72a5e | 130 | return; |
1da177e4 LT |
131 | } |
132 | ||
1da177e4 | 133 | static ssize_t |
f883d9db PM |
134 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
135 | const char *buf, size_t count) | |
1da177e4 | 136 | { |
4be44fcd | 137 | int ret = count; |
4be44fcd | 138 | acpi_status status; |
4be44fcd | 139 | acpi_object_type type = 0; |
f883d9db | 140 | struct acpi_device *acpi_device = to_acpi_device(d); |
1da177e4 | 141 | |
1da177e4 LT |
142 | if ((!count) || (buf[0] != '1')) { |
143 | return -EINVAL; | |
144 | } | |
1da177e4 | 145 | #ifndef FORCE_EJECT |
f883d9db | 146 | if (acpi_device->driver == NULL) { |
1da177e4 LT |
147 | ret = -ENODEV; |
148 | goto err; | |
149 | } | |
150 | #endif | |
f883d9db PM |
151 | status = acpi_get_type(acpi_device->handle, &type); |
152 | if (ACPI_FAILURE(status) || (!acpi_device->flags.ejectable)) { | |
1da177e4 LT |
153 | ret = -ENODEV; |
154 | goto err; | |
155 | } | |
1da177e4 | 156 | |
c8d72a5e | 157 | acpi_os_hotplug_execute(acpi_bus_hot_remove_device, acpi_device->handle); |
74523c90 | 158 | err: |
1da177e4 | 159 | return ret; |
1da177e4 LT |
160 | } |
161 | ||
f883d9db | 162 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
1da177e4 | 163 | |
e49bd2dd ZR |
164 | static ssize_t |
165 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
166 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1da177e4 | 167 | |
ea8d82fd | 168 | return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev)); |
1da177e4 | 169 | } |
e49bd2dd | 170 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
1da177e4 | 171 | |
e49bd2dd ZR |
172 | static ssize_t |
173 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
174 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
175 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
176 | int result; | |
1da177e4 | 177 | |
e49bd2dd | 178 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
0c526d96 | 179 | if (result) |
e49bd2dd | 180 | goto end; |
1da177e4 | 181 | |
e49bd2dd ZR |
182 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
183 | kfree(path.pointer); | |
0c526d96 | 184 | end: |
e49bd2dd | 185 | return result; |
1da177e4 | 186 | } |
e49bd2dd | 187 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
1da177e4 | 188 | |
e49bd2dd | 189 | static int acpi_device_setup_files(struct acpi_device *dev) |
1da177e4 | 190 | { |
f883d9db PM |
191 | acpi_status status; |
192 | acpi_handle temp; | |
e49bd2dd | 193 | int result = 0; |
1da177e4 LT |
194 | |
195 | /* | |
e49bd2dd | 196 | * Devices gotten from FADT don't have a "path" attribute |
1da177e4 | 197 | */ |
0c526d96 | 198 | if (dev->handle) { |
e49bd2dd | 199 | result = device_create_file(&dev->dev, &dev_attr_path); |
0c526d96 | 200 | if (result) |
e49bd2dd | 201 | goto end; |
1da177e4 LT |
202 | } |
203 | ||
1131b938 BH |
204 | result = device_create_file(&dev->dev, &dev_attr_hid); |
205 | if (result) | |
206 | goto end; | |
1da177e4 | 207 | |
1131b938 BH |
208 | result = device_create_file(&dev->dev, &dev_attr_modalias); |
209 | if (result) | |
210 | goto end; | |
29b71a1c | 211 | |
e49bd2dd ZR |
212 | /* |
213 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
214 | * hot-removal function from userland. | |
215 | */ | |
f883d9db PM |
216 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); |
217 | if (ACPI_SUCCESS(status)) | |
e49bd2dd | 218 | result = device_create_file(&dev->dev, &dev_attr_eject); |
0c526d96 | 219 | end: |
e49bd2dd | 220 | return result; |
1da177e4 LT |
221 | } |
222 | ||
f883d9db | 223 | static void acpi_device_remove_files(struct acpi_device *dev) |
1da177e4 | 224 | { |
f883d9db PM |
225 | acpi_status status; |
226 | acpi_handle temp; | |
1da177e4 | 227 | |
f883d9db PM |
228 | /* |
229 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
230 | * hot-removal function from userland. | |
231 | */ | |
232 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); | |
233 | if (ACPI_SUCCESS(status)) | |
234 | device_remove_file(&dev->dev, &dev_attr_eject); | |
1da177e4 | 235 | |
1131b938 BH |
236 | device_remove_file(&dev->dev, &dev_attr_modalias); |
237 | device_remove_file(&dev->dev, &dev_attr_hid); | |
0c526d96 | 238 | if (dev->handle) |
e49bd2dd | 239 | device_remove_file(&dev->dev, &dev_attr_path); |
1da177e4 | 240 | } |
1da177e4 | 241 | /* -------------------------------------------------------------------------- |
9e89dde2 | 242 | ACPI Bus operations |
1da177e4 | 243 | -------------------------------------------------------------------------- */ |
29b71a1c TR |
244 | |
245 | int acpi_match_device_ids(struct acpi_device *device, | |
246 | const struct acpi_device_id *ids) | |
247 | { | |
248 | const struct acpi_device_id *id; | |
7f47fa6c | 249 | struct acpi_hardware_id *hwid; |
29b71a1c | 250 | |
39a0ad87 ZY |
251 | /* |
252 | * If the device is not present, it is unnecessary to load device | |
253 | * driver for it. | |
254 | */ | |
255 | if (!device->status.present) | |
256 | return -ENODEV; | |
257 | ||
7f47fa6c BH |
258 | for (id = ids; id->id[0]; id++) |
259 | list_for_each_entry(hwid, &device->pnp.ids, list) | |
260 | if (!strcmp((char *) id->id, hwid->id)) | |
29b71a1c | 261 | return 0; |
29b71a1c TR |
262 | |
263 | return -ENOENT; | |
264 | } | |
265 | EXPORT_SYMBOL(acpi_match_device_ids); | |
266 | ||
7f47fa6c BH |
267 | static void acpi_free_ids(struct acpi_device *device) |
268 | { | |
269 | struct acpi_hardware_id *id, *tmp; | |
270 | ||
271 | list_for_each_entry_safe(id, tmp, &device->pnp.ids, list) { | |
272 | kfree(id->id); | |
273 | kfree(id); | |
274 | } | |
275 | } | |
276 | ||
1890a97a | 277 | static void acpi_device_release(struct device *dev) |
1da177e4 | 278 | { |
1890a97a | 279 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 280 | |
7f47fa6c | 281 | acpi_free_ids(acpi_dev); |
1890a97a | 282 | kfree(acpi_dev); |
1da177e4 LT |
283 | } |
284 | ||
5d9464a4 | 285 | static int acpi_device_suspend(struct device *dev, pm_message_t state) |
1da177e4 | 286 | { |
5d9464a4 PM |
287 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
288 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
1da177e4 | 289 | |
5d9464a4 PM |
290 | if (acpi_drv && acpi_drv->ops.suspend) |
291 | return acpi_drv->ops.suspend(acpi_dev, state); | |
1da177e4 LT |
292 | return 0; |
293 | } | |
1da177e4 | 294 | |
5d9464a4 | 295 | static int acpi_device_resume(struct device *dev) |
9e89dde2 | 296 | { |
5d9464a4 PM |
297 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
298 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
1da177e4 | 299 | |
5d9464a4 PM |
300 | if (acpi_drv && acpi_drv->ops.resume) |
301 | return acpi_drv->ops.resume(acpi_dev); | |
d550d98d | 302 | return 0; |
1da177e4 LT |
303 | } |
304 | ||
5d9464a4 | 305 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 306 | { |
5d9464a4 PM |
307 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
308 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
1da177e4 | 309 | |
29b71a1c | 310 | return !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
5d9464a4 | 311 | } |
1da177e4 | 312 | |
7eff2e7a | 313 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 | 314 | { |
5d9464a4 | 315 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
7eff2e7a | 316 | int len; |
5d9464a4 | 317 | |
7eff2e7a KS |
318 | if (add_uevent_var(env, "MODALIAS=")) |
319 | return -ENOMEM; | |
320 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], | |
321 | sizeof(env->buf) - env->buflen); | |
322 | if (len >= (sizeof(env->buf) - env->buflen)) | |
323 | return -ENOMEM; | |
324 | env->buflen += len; | |
9e89dde2 | 325 | return 0; |
1da177e4 LT |
326 | } |
327 | ||
46ec8598 BH |
328 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
329 | { | |
330 | struct acpi_device *device = data; | |
331 | ||
332 | device->driver->ops.notify(device, event); | |
333 | } | |
334 | ||
335 | static acpi_status acpi_device_notify_fixed(void *data) | |
336 | { | |
337 | struct acpi_device *device = data; | |
338 | ||
53de5356 BH |
339 | /* Fixed hardware devices have no handles */ |
340 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); | |
46ec8598 BH |
341 | return AE_OK; |
342 | } | |
343 | ||
344 | static int acpi_device_install_notify_handler(struct acpi_device *device) | |
345 | { | |
346 | acpi_status status; | |
46ec8598 | 347 | |
ccba2a36 | 348 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
349 | status = |
350 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
351 | acpi_device_notify_fixed, | |
352 | device); | |
ccba2a36 | 353 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
354 | status = |
355 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
356 | acpi_device_notify_fixed, | |
357 | device); | |
358 | else | |
359 | status = acpi_install_notify_handler(device->handle, | |
360 | ACPI_DEVICE_NOTIFY, | |
361 | acpi_device_notify, | |
362 | device); | |
363 | ||
364 | if (ACPI_FAILURE(status)) | |
365 | return -EINVAL; | |
366 | return 0; | |
367 | } | |
368 | ||
369 | static void acpi_device_remove_notify_handler(struct acpi_device *device) | |
370 | { | |
ccba2a36 | 371 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
372 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, |
373 | acpi_device_notify_fixed); | |
ccba2a36 | 374 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
375 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, |
376 | acpi_device_notify_fixed); | |
377 | else | |
378 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, | |
379 | acpi_device_notify); | |
380 | } | |
381 | ||
5d9464a4 PM |
382 | static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *); |
383 | static int acpi_start_single_object(struct acpi_device *); | |
384 | static int acpi_device_probe(struct device * dev) | |
1da177e4 | 385 | { |
5d9464a4 PM |
386 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
387 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
388 | int ret; | |
389 | ||
390 | ret = acpi_bus_driver_init(acpi_dev, acpi_drv); | |
391 | if (!ret) { | |
c4168bff LS |
392 | if (acpi_dev->bus_ops.acpi_op_start) |
393 | acpi_start_single_object(acpi_dev); | |
46ec8598 BH |
394 | |
395 | if (acpi_drv->ops.notify) { | |
396 | ret = acpi_device_install_notify_handler(acpi_dev); | |
397 | if (ret) { | |
46ec8598 BH |
398 | if (acpi_drv->ops.remove) |
399 | acpi_drv->ops.remove(acpi_dev, | |
400 | acpi_dev->removal_type); | |
401 | return ret; | |
402 | } | |
403 | } | |
404 | ||
5d9464a4 PM |
405 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
406 | "Found driver [%s] for device [%s]\n", | |
407 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
408 | get_device(dev); | |
409 | } | |
410 | return ret; | |
411 | } | |
1da177e4 | 412 | |
5d9464a4 PM |
413 | static int acpi_device_remove(struct device * dev) |
414 | { | |
415 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
416 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
417 | ||
418 | if (acpi_drv) { | |
46ec8598 BH |
419 | if (acpi_drv->ops.notify) |
420 | acpi_device_remove_notify_handler(acpi_dev); | |
5d9464a4 | 421 | if (acpi_drv->ops.remove) |
96333578 | 422 | acpi_drv->ops.remove(acpi_dev, acpi_dev->removal_type); |
1da177e4 | 423 | } |
5d9464a4 | 424 | acpi_dev->driver = NULL; |
db89b4f0 | 425 | acpi_dev->driver_data = NULL; |
1da177e4 | 426 | |
5d9464a4 | 427 | put_device(dev); |
9e89dde2 ZR |
428 | return 0; |
429 | } | |
1da177e4 | 430 | |
55955aad | 431 | struct bus_type acpi_bus_type = { |
9e89dde2 ZR |
432 | .name = "acpi", |
433 | .suspend = acpi_device_suspend, | |
434 | .resume = acpi_device_resume, | |
5d9464a4 PM |
435 | .match = acpi_bus_match, |
436 | .probe = acpi_device_probe, | |
437 | .remove = acpi_device_remove, | |
438 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
439 | }; |
440 | ||
66b7ed40 | 441 | static int acpi_device_register(struct acpi_device *device) |
1da177e4 | 442 | { |
4be44fcd | 443 | int result; |
e49bd2dd ZR |
444 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
445 | int found = 0; | |
66b7ed40 | 446 | |
9e89dde2 ZR |
447 | /* |
448 | * Linkage | |
449 | * ------- | |
450 | * Link this device to its parent and siblings. | |
451 | */ | |
452 | INIT_LIST_HEAD(&device->children); | |
453 | INIT_LIST_HEAD(&device->node); | |
9e89dde2 | 454 | INIT_LIST_HEAD(&device->wakeup_list); |
1da177e4 | 455 | |
e49bd2dd ZR |
456 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
457 | if (!new_bus_id) { | |
458 | printk(KERN_ERR PREFIX "Memory allocation error\n"); | |
459 | return -ENOMEM; | |
1da177e4 | 460 | } |
e49bd2dd | 461 | |
9090589d | 462 | mutex_lock(&acpi_device_lock); |
e49bd2dd ZR |
463 | /* |
464 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
465 | * If failed, create one and link it into acpi_bus_id_list | |
466 | */ | |
467 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
1131b938 BH |
468 | if (!strcmp(acpi_device_bus_id->bus_id, |
469 | acpi_device_hid(device))) { | |
470 | acpi_device_bus_id->instance_no++; | |
e49bd2dd ZR |
471 | found = 1; |
472 | kfree(new_bus_id); | |
473 | break; | |
474 | } | |
1da177e4 | 475 | } |
0c526d96 | 476 | if (!found) { |
e49bd2dd | 477 | acpi_device_bus_id = new_bus_id; |
1131b938 | 478 | strcpy(acpi_device_bus_id->bus_id, acpi_device_hid(device)); |
e49bd2dd ZR |
479 | acpi_device_bus_id->instance_no = 0; |
480 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 481 | } |
0794469d | 482 | dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 483 | |
33b57150 | 484 | if (device->parent) |
9e89dde2 | 485 | list_add_tail(&device->node, &device->parent->children); |
33b57150 | 486 | |
9e89dde2 ZR |
487 | if (device->wakeup.flags.valid) |
488 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
9090589d | 489 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 490 | |
1890a97a | 491 | if (device->parent) |
66b7ed40 | 492 | device->dev.parent = &device->parent->dev; |
1890a97a | 493 | device->dev.bus = &acpi_bus_type; |
1890a97a | 494 | device->dev.release = &acpi_device_release; |
8b12b922 | 495 | result = device_register(&device->dev); |
0c526d96 | 496 | if (result) { |
8b12b922 | 497 | dev_err(&device->dev, "Error registering device\n"); |
e49bd2dd | 498 | goto end; |
1da177e4 | 499 | } |
1da177e4 | 500 | |
e49bd2dd | 501 | result = acpi_device_setup_files(device); |
0c526d96 | 502 | if (result) |
0794469d KS |
503 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
504 | dev_name(&device->dev)); | |
1da177e4 | 505 | |
96333578 | 506 | device->removal_type = ACPI_BUS_REMOVAL_NORMAL; |
1da177e4 | 507 | return 0; |
0c526d96 | 508 | end: |
9090589d | 509 | mutex_lock(&acpi_device_lock); |
33b57150 | 510 | if (device->parent) |
e49bd2dd | 511 | list_del(&device->node); |
e49bd2dd | 512 | list_del(&device->wakeup_list); |
9090589d | 513 | mutex_unlock(&acpi_device_lock); |
e49bd2dd | 514 | return result; |
1da177e4 LT |
515 | } |
516 | ||
9e89dde2 ZR |
517 | static void acpi_device_unregister(struct acpi_device *device, int type) |
518 | { | |
9090589d | 519 | mutex_lock(&acpi_device_lock); |
33b57150 | 520 | if (device->parent) |
9e89dde2 | 521 | list_del(&device->node); |
1da177e4 | 522 | |
9e89dde2 | 523 | list_del(&device->wakeup_list); |
9090589d | 524 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 525 | |
9e89dde2 | 526 | acpi_detach_data(device->handle, acpi_bus_data_handler); |
1890a97a | 527 | |
f883d9db | 528 | acpi_device_remove_files(device); |
1890a97a | 529 | device_unregister(&device->dev); |
1da177e4 LT |
530 | } |
531 | ||
9e89dde2 ZR |
532 | /* -------------------------------------------------------------------------- |
533 | Driver Management | |
534 | -------------------------------------------------------------------------- */ | |
1da177e4 | 535 | /** |
d758a8fa RD |
536 | * acpi_bus_driver_init - add a device to a driver |
537 | * @device: the device to add and initialize | |
538 | * @driver: driver for the device | |
539 | * | |
0c526d96 | 540 | * Used to initialize a device via its device driver. Called whenever a |
1890a97a | 541 | * driver is bound to a device. Invokes the driver's add() ops. |
1da177e4 LT |
542 | */ |
543 | static int | |
4be44fcd | 544 | acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) |
1da177e4 | 545 | { |
4be44fcd | 546 | int result = 0; |
1da177e4 | 547 | |
1da177e4 | 548 | if (!device || !driver) |
d550d98d | 549 | return -EINVAL; |
1da177e4 LT |
550 | |
551 | if (!driver->ops.add) | |
d550d98d | 552 | return -ENOSYS; |
1da177e4 LT |
553 | |
554 | result = driver->ops.add(device); | |
555 | if (result) { | |
556 | device->driver = NULL; | |
db89b4f0 | 557 | device->driver_data = NULL; |
d550d98d | 558 | return result; |
1da177e4 LT |
559 | } |
560 | ||
561 | device->driver = driver; | |
562 | ||
563 | /* | |
564 | * TBD - Configuration Management: Assign resources to device based | |
565 | * upon possible configuration and currently allocated resources. | |
566 | */ | |
567 | ||
4be44fcd LB |
568 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
569 | "Driver successfully bound to device\n")); | |
d550d98d | 570 | return 0; |
3fb02738 RS |
571 | } |
572 | ||
8713cbef | 573 | static int acpi_start_single_object(struct acpi_device *device) |
3fb02738 RS |
574 | { |
575 | int result = 0; | |
576 | struct acpi_driver *driver; | |
577 | ||
3fb02738 RS |
578 | |
579 | if (!(driver = device->driver)) | |
d550d98d | 580 | return 0; |
3fb02738 | 581 | |
1da177e4 LT |
582 | if (driver->ops.start) { |
583 | result = driver->ops.start(device); | |
584 | if (result && driver->ops.remove) | |
585 | driver->ops.remove(device, ACPI_BUS_REMOVAL_NORMAL); | |
1da177e4 LT |
586 | } |
587 | ||
d550d98d | 588 | return result; |
1da177e4 LT |
589 | } |
590 | ||
9e89dde2 ZR |
591 | /** |
592 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
593 | * @driver: driver being registered | |
594 | * | |
595 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
596 | * devices that match the driver's criteria and binds. Returns zero for | |
597 | * success or a negative error status for failure. | |
598 | */ | |
599 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
1da177e4 | 600 | { |
1890a97a | 601 | int ret; |
1da177e4 | 602 | |
9e89dde2 ZR |
603 | if (acpi_disabled) |
604 | return -ENODEV; | |
1890a97a PM |
605 | driver->drv.name = driver->name; |
606 | driver->drv.bus = &acpi_bus_type; | |
607 | driver->drv.owner = driver->owner; | |
1da177e4 | 608 | |
1890a97a PM |
609 | ret = driver_register(&driver->drv); |
610 | return ret; | |
9e89dde2 | 611 | } |
1da177e4 | 612 | |
9e89dde2 ZR |
613 | EXPORT_SYMBOL(acpi_bus_register_driver); |
614 | ||
615 | /** | |
616 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus | |
617 | * @driver: driver to unregister | |
618 | * | |
619 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
620 | * devices that match the driver's criteria and unbinds. | |
621 | */ | |
622 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
623 | { | |
1890a97a | 624 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
625 | } |
626 | ||
627 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
628 | ||
9e89dde2 ZR |
629 | /* -------------------------------------------------------------------------- |
630 | Device Enumeration | |
631 | -------------------------------------------------------------------------- */ | |
5c478f49 BH |
632 | static struct acpi_device *acpi_bus_get_parent(acpi_handle handle) |
633 | { | |
634 | acpi_status status; | |
635 | int ret; | |
636 | struct acpi_device *device; | |
637 | ||
638 | /* | |
639 | * Fixed hardware devices do not appear in the namespace and do not | |
640 | * have handles, but we fabricate acpi_devices for them, so we have | |
641 | * to deal with them specially. | |
642 | */ | |
643 | if (handle == NULL) | |
644 | return acpi_root; | |
645 | ||
646 | do { | |
647 | status = acpi_get_parent(handle, &handle); | |
648 | if (status == AE_NULL_ENTRY) | |
649 | return NULL; | |
650 | if (ACPI_FAILURE(status)) | |
651 | return acpi_root; | |
652 | ||
653 | ret = acpi_bus_get_device(handle, &device); | |
654 | if (ret == 0) | |
655 | return device; | |
656 | } while (1); | |
657 | } | |
658 | ||
9e89dde2 ZR |
659 | acpi_status |
660 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
661 | { | |
662 | acpi_status status; | |
663 | acpi_handle tmp; | |
664 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
665 | union acpi_object *obj; | |
666 | ||
667 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
668 | if (ACPI_FAILURE(status)) | |
669 | return status; | |
670 | ||
671 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
672 | if (ACPI_SUCCESS(status)) { | |
673 | obj = buffer.pointer; | |
3b5fee59 HM |
674 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
675 | ejd); | |
9e89dde2 ZR |
676 | kfree(buffer.pointer); |
677 | } | |
678 | return status; | |
679 | } | |
680 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
681 | ||
8e4319c4 | 682 | void acpi_bus_data_handler(acpi_handle handle, void *context) |
9e89dde2 ZR |
683 | { |
684 | ||
685 | /* TBD */ | |
686 | ||
687 | return; | |
688 | } | |
689 | ||
9e89dde2 ZR |
690 | static int acpi_bus_get_perf_flags(struct acpi_device *device) |
691 | { | |
692 | device->performance.state = ACPI_STATE_UNKNOWN; | |
693 | return 0; | |
694 | } | |
695 | ||
696 | static acpi_status | |
697 | acpi_bus_extract_wakeup_device_power_package(struct acpi_device *device, | |
698 | union acpi_object *package) | |
699 | { | |
700 | int i = 0; | |
701 | union acpi_object *element = NULL; | |
702 | ||
703 | if (!device || !package || (package->package.count < 2)) | |
704 | return AE_BAD_PARAMETER; | |
705 | ||
706 | element = &(package->package.elements[0]); | |
707 | if (!element) | |
708 | return AE_BAD_PARAMETER; | |
709 | if (element->type == ACPI_TYPE_PACKAGE) { | |
710 | if ((element->package.count < 2) || | |
711 | (element->package.elements[0].type != | |
712 | ACPI_TYPE_LOCAL_REFERENCE) | |
713 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) | |
714 | return AE_BAD_DATA; | |
715 | device->wakeup.gpe_device = | |
716 | element->package.elements[0].reference.handle; | |
717 | device->wakeup.gpe_number = | |
718 | (u32) element->package.elements[1].integer.value; | |
719 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
720 | device->wakeup.gpe_number = element->integer.value; | |
721 | } else | |
722 | return AE_BAD_DATA; | |
723 | ||
724 | element = &(package->package.elements[1]); | |
725 | if (element->type != ACPI_TYPE_INTEGER) { | |
726 | return AE_BAD_DATA; | |
727 | } | |
728 | device->wakeup.sleep_state = element->integer.value; | |
729 | ||
730 | if ((package->package.count - 2) > ACPI_MAX_HANDLES) { | |
731 | return AE_NO_MEMORY; | |
732 | } | |
733 | device->wakeup.resources.count = package->package.count - 2; | |
734 | for (i = 0; i < device->wakeup.resources.count; i++) { | |
735 | element = &(package->package.elements[i + 2]); | |
cd0b2248 | 736 | if (element->type != ACPI_TYPE_LOCAL_REFERENCE) |
9e89dde2 | 737 | return AE_BAD_DATA; |
9e89dde2 ZR |
738 | |
739 | device->wakeup.resources.handles[i] = element->reference.handle; | |
1da177e4 | 740 | } |
9e89dde2 ZR |
741 | |
742 | return AE_OK; | |
1da177e4 LT |
743 | } |
744 | ||
f517709d | 745 | static void acpi_bus_set_run_wake_flags(struct acpi_device *device) |
1da177e4 | 746 | { |
29b71a1c TR |
747 | struct acpi_device_id button_device_ids[] = { |
748 | {"PNP0C0D", 0}, | |
749 | {"PNP0C0C", 0}, | |
750 | {"PNP0C0E", 0}, | |
751 | {"", 0}, | |
752 | }; | |
f517709d RW |
753 | acpi_status status; |
754 | acpi_event_status event_status; | |
755 | ||
756 | device->wakeup.run_wake_count = 0; | |
b67ea761 | 757 | device->wakeup.flags.notifier_present = 0; |
f517709d RW |
758 | |
759 | /* Power button, Lid switch always enable wakeup */ | |
760 | if (!acpi_match_device_ids(device, button_device_ids)) { | |
761 | device->wakeup.flags.run_wake = 1; | |
762 | device->wakeup.flags.always_enabled = 1; | |
763 | return; | |
764 | } | |
765 | ||
766 | status = acpi_get_gpe_status(NULL, device->wakeup.gpe_number, | |
767 | ACPI_NOT_ISR, &event_status); | |
768 | if (status == AE_OK) | |
769 | device->wakeup.flags.run_wake = | |
770 | !!(event_status & ACPI_EVENT_FLAG_HANDLE); | |
771 | } | |
772 | ||
773 | static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device) | |
774 | { | |
775 | acpi_status status = 0; | |
776 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
777 | union acpi_object *package = NULL; | |
778 | int psw_error; | |
29b71a1c | 779 | |
9e89dde2 ZR |
780 | /* _PRW */ |
781 | status = acpi_evaluate_object(device->handle, "_PRW", NULL, &buffer); | |
782 | if (ACPI_FAILURE(status)) { | |
783 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
784 | goto end; | |
1da177e4 | 785 | } |
1da177e4 | 786 | |
9e89dde2 ZR |
787 | package = (union acpi_object *)buffer.pointer; |
788 | status = acpi_bus_extract_wakeup_device_power_package(device, package); | |
789 | if (ACPI_FAILURE(status)) { | |
790 | ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package")); | |
791 | goto end; | |
792 | } | |
1da177e4 | 793 | |
9e89dde2 | 794 | kfree(buffer.pointer); |
1da177e4 | 795 | |
9e89dde2 | 796 | device->wakeup.flags.valid = 1; |
9b83ccd2 | 797 | device->wakeup.prepare_count = 0; |
f517709d | 798 | acpi_bus_set_run_wake_flags(device); |
729b2bdb ZY |
799 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
800 | * system for the ACPI device with the _PRW object. | |
801 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. | |
802 | * So it is necessary to call _DSW object first. Only when it is not | |
803 | * present will the _PSW object used. | |
804 | */ | |
77e76609 RW |
805 | psw_error = acpi_device_sleep_wake(device, 0, 0, 0); |
806 | if (psw_error) | |
807 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
808 | "error in _DSW or _PSW evaluation\n")); | |
809 | ||
0c526d96 | 810 | end: |
9e89dde2 ZR |
811 | if (ACPI_FAILURE(status)) |
812 | device->flags.wake_capable = 0; | |
d550d98d | 813 | return 0; |
1da177e4 | 814 | } |
1da177e4 | 815 | |
9e89dde2 | 816 | static int acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 817 | { |
9e89dde2 ZR |
818 | acpi_status status = 0; |
819 | acpi_handle handle = NULL; | |
820 | u32 i = 0; | |
1a365616 | 821 | |
4be44fcd | 822 | |
9e89dde2 ZR |
823 | /* |
824 | * Power Management Flags | |
825 | */ | |
826 | status = acpi_get_handle(device->handle, "_PSC", &handle); | |
827 | if (ACPI_SUCCESS(status)) | |
828 | device->power.flags.explicit_get = 1; | |
829 | status = acpi_get_handle(device->handle, "_IRC", &handle); | |
830 | if (ACPI_SUCCESS(status)) | |
831 | device->power.flags.inrush_current = 1; | |
1da177e4 | 832 | |
9e89dde2 ZR |
833 | /* |
834 | * Enumerate supported power management states | |
835 | */ | |
836 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3; i++) { | |
837 | struct acpi_device_power_state *ps = &device->power.states[i]; | |
838 | char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' }; | |
1da177e4 | 839 | |
9e89dde2 ZR |
840 | /* Evaluate "_PRx" to se if power resources are referenced */ |
841 | acpi_evaluate_reference(device->handle, object_name, NULL, | |
842 | &ps->resources); | |
843 | if (ps->resources.count) { | |
844 | device->power.flags.power_resources = 1; | |
845 | ps->flags.valid = 1; | |
1da177e4 | 846 | } |
1da177e4 | 847 | |
9e89dde2 ZR |
848 | /* Evaluate "_PSx" to see if we can do explicit sets */ |
849 | object_name[2] = 'S'; | |
850 | status = acpi_get_handle(device->handle, object_name, &handle); | |
851 | if (ACPI_SUCCESS(status)) { | |
852 | ps->flags.explicit_set = 1; | |
853 | ps->flags.valid = 1; | |
1da177e4 | 854 | } |
1da177e4 | 855 | |
9e89dde2 ZR |
856 | /* State is valid if we have some power control */ |
857 | if (ps->resources.count || ps->flags.explicit_set) | |
858 | ps->flags.valid = 1; | |
1da177e4 | 859 | |
9e89dde2 ZR |
860 | ps->power = -1; /* Unknown - driver assigned */ |
861 | ps->latency = -1; /* Unknown - driver assigned */ | |
862 | } | |
1da177e4 | 863 | |
9e89dde2 ZR |
864 | /* Set defaults for D0 and D3 states (always valid) */ |
865 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
866 | device->power.states[ACPI_STATE_D0].power = 100; | |
867 | device->power.states[ACPI_STATE_D3].flags.valid = 1; | |
868 | device->power.states[ACPI_STATE_D3].power = 0; | |
c8f7a62c | 869 | |
9e89dde2 | 870 | /* TBD: System wake support and resource requirements. */ |
c8f7a62c | 871 | |
9e89dde2 | 872 | device->power.state = ACPI_STATE_UNKNOWN; |
a51e145f | 873 | acpi_bus_get_power(device->handle, &(device->power.state)); |
c8f7a62c | 874 | |
9e89dde2 ZR |
875 | return 0; |
876 | } | |
c8f7a62c | 877 | |
4be44fcd | 878 | static int acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 879 | { |
4be44fcd LB |
880 | acpi_status status = AE_OK; |
881 | acpi_handle temp = NULL; | |
1da177e4 | 882 | |
1da177e4 LT |
883 | |
884 | /* Presence of _STA indicates 'dynamic_status' */ | |
885 | status = acpi_get_handle(device->handle, "_STA", &temp); | |
886 | if (ACPI_SUCCESS(status)) | |
887 | device->flags.dynamic_status = 1; | |
888 | ||
1da177e4 LT |
889 | /* Presence of _RMV indicates 'removable' */ |
890 | status = acpi_get_handle(device->handle, "_RMV", &temp); | |
891 | if (ACPI_SUCCESS(status)) | |
892 | device->flags.removable = 1; | |
893 | ||
894 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
895 | status = acpi_get_handle(device->handle, "_EJD", &temp); | |
896 | if (ACPI_SUCCESS(status)) | |
897 | device->flags.ejectable = 1; | |
898 | else { | |
899 | status = acpi_get_handle(device->handle, "_EJ0", &temp); | |
900 | if (ACPI_SUCCESS(status)) | |
901 | device->flags.ejectable = 1; | |
902 | } | |
903 | ||
904 | /* Presence of _LCK indicates 'lockable' */ | |
905 | status = acpi_get_handle(device->handle, "_LCK", &temp); | |
906 | if (ACPI_SUCCESS(status)) | |
907 | device->flags.lockable = 1; | |
908 | ||
909 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ | |
910 | status = acpi_get_handle(device->handle, "_PS0", &temp); | |
911 | if (ACPI_FAILURE(status)) | |
912 | status = acpi_get_handle(device->handle, "_PR0", &temp); | |
913 | if (ACPI_SUCCESS(status)) | |
914 | device->flags.power_manageable = 1; | |
915 | ||
916 | /* Presence of _PRW indicates wake capable */ | |
917 | status = acpi_get_handle(device->handle, "_PRW", &temp); | |
918 | if (ACPI_SUCCESS(status)) | |
919 | device->flags.wake_capable = 1; | |
920 | ||
3c5f9be4 | 921 | /* TBD: Performance management */ |
1da177e4 | 922 | |
d550d98d | 923 | return 0; |
1da177e4 LT |
924 | } |
925 | ||
c7bcb4e9 | 926 | static void acpi_device_get_busid(struct acpi_device *device) |
1da177e4 | 927 | { |
4be44fcd LB |
928 | char bus_id[5] = { '?', 0 }; |
929 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
930 | int i = 0; | |
1da177e4 LT |
931 | |
932 | /* | |
933 | * Bus ID | |
934 | * ------ | |
935 | * The device's Bus ID is simply the object name. | |
936 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
937 | */ | |
859ac9a4 | 938 | if (ACPI_IS_ROOT_DEVICE(device)) { |
1da177e4 | 939 | strcpy(device->pnp.bus_id, "ACPI"); |
859ac9a4 BH |
940 | return; |
941 | } | |
942 | ||
943 | switch (device->device_type) { | |
1da177e4 LT |
944 | case ACPI_BUS_TYPE_POWER_BUTTON: |
945 | strcpy(device->pnp.bus_id, "PWRF"); | |
946 | break; | |
947 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
948 | strcpy(device->pnp.bus_id, "SLPF"); | |
949 | break; | |
950 | default: | |
66b7ed40 | 951 | acpi_get_name(device->handle, ACPI_SINGLE_NAME, &buffer); |
1da177e4 LT |
952 | /* Clean up trailing underscores (if any) */ |
953 | for (i = 3; i > 1; i--) { | |
954 | if (bus_id[i] == '_') | |
955 | bus_id[i] = '\0'; | |
956 | else | |
957 | break; | |
958 | } | |
959 | strcpy(device->pnp.bus_id, bus_id); | |
960 | break; | |
961 | } | |
962 | } | |
963 | ||
54735266 ZR |
964 | /* |
965 | * acpi_bay_match - see if a device is an ejectable driver bay | |
966 | * | |
967 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
968 | * then we can safely call it an ejectable drive bay | |
969 | */ | |
970 | static int acpi_bay_match(struct acpi_device *device){ | |
971 | acpi_status status; | |
972 | acpi_handle handle; | |
973 | acpi_handle tmp; | |
974 | acpi_handle phandle; | |
975 | ||
976 | handle = device->handle; | |
977 | ||
978 | status = acpi_get_handle(handle, "_EJ0", &tmp); | |
979 | if (ACPI_FAILURE(status)) | |
980 | return -ENODEV; | |
981 | ||
982 | if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || | |
983 | (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || | |
984 | (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || | |
985 | (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) | |
986 | return 0; | |
987 | ||
988 | if (acpi_get_parent(handle, &phandle)) | |
989 | return -ENODEV; | |
990 | ||
991 | if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) || | |
992 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) || | |
993 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) || | |
994 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp)))) | |
995 | return 0; | |
996 | ||
997 | return -ENODEV; | |
998 | } | |
999 | ||
3620f2f2 FS |
1000 | /* |
1001 | * acpi_dock_match - see if a device has a _DCK method | |
1002 | */ | |
1003 | static int acpi_dock_match(struct acpi_device *device) | |
1004 | { | |
1005 | acpi_handle tmp; | |
1006 | return acpi_get_handle(device->handle, "_DCK", &tmp); | |
1007 | } | |
1008 | ||
7f47fa6c | 1009 | char *acpi_device_hid(struct acpi_device *device) |
15b8dd53 | 1010 | { |
7f47fa6c | 1011 | struct acpi_hardware_id *hid; |
15b8dd53 | 1012 | |
7f47fa6c BH |
1013 | hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list); |
1014 | return hid->id; | |
1015 | } | |
1016 | EXPORT_SYMBOL(acpi_device_hid); | |
15b8dd53 | 1017 | |
7f47fa6c BH |
1018 | static void acpi_add_id(struct acpi_device *device, const char *dev_id) |
1019 | { | |
1020 | struct acpi_hardware_id *id; | |
15b8dd53 | 1021 | |
7f47fa6c BH |
1022 | id = kmalloc(sizeof(*id), GFP_KERNEL); |
1023 | if (!id) | |
1024 | return; | |
15b8dd53 | 1025 | |
7f47fa6c BH |
1026 | id->id = kmalloc(strlen(dev_id) + 1, GFP_KERNEL); |
1027 | if (!id->id) { | |
1028 | kfree(id); | |
1029 | return; | |
15b8dd53 BM |
1030 | } |
1031 | ||
7f47fa6c BH |
1032 | strcpy(id->id, dev_id); |
1033 | list_add_tail(&id->list, &device->pnp.ids); | |
15b8dd53 BM |
1034 | } |
1035 | ||
222e82ac DW |
1036 | /* |
1037 | * Old IBM workstations have a DSDT bug wherein the SMBus object | |
1038 | * lacks the SMBUS01 HID and the methods do not have the necessary "_" | |
1039 | * prefix. Work around this. | |
1040 | */ | |
1041 | static int acpi_ibm_smbus_match(struct acpi_device *device) | |
1042 | { | |
1043 | acpi_handle h_dummy; | |
1044 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
1045 | int result; | |
1046 | ||
1047 | if (!dmi_name_in_vendors("IBM")) | |
1048 | return -ENODEV; | |
1049 | ||
1050 | /* Look for SMBS object */ | |
1051 | result = acpi_get_name(device->handle, ACPI_SINGLE_NAME, &path); | |
1052 | if (result) | |
1053 | return result; | |
1054 | ||
1055 | if (strcmp("SMBS", path.pointer)) { | |
1056 | result = -ENODEV; | |
1057 | goto out; | |
1058 | } | |
1059 | ||
1060 | /* Does it have the necessary (but misnamed) methods? */ | |
1061 | result = -ENODEV; | |
1062 | if (ACPI_SUCCESS(acpi_get_handle(device->handle, "SBI", &h_dummy)) && | |
1063 | ACPI_SUCCESS(acpi_get_handle(device->handle, "SBR", &h_dummy)) && | |
1064 | ACPI_SUCCESS(acpi_get_handle(device->handle, "SBW", &h_dummy))) | |
1065 | result = 0; | |
1066 | out: | |
1067 | kfree(path.pointer); | |
1068 | return result; | |
1069 | } | |
1070 | ||
c7bcb4e9 | 1071 | static void acpi_device_set_id(struct acpi_device *device) |
1da177e4 | 1072 | { |
4be44fcd | 1073 | acpi_status status; |
57f3674f BH |
1074 | struct acpi_device_info *info; |
1075 | struct acpica_device_id_list *cid_list; | |
7f47fa6c | 1076 | int i; |
1da177e4 | 1077 | |
c7bcb4e9 | 1078 | switch (device->device_type) { |
1da177e4 | 1079 | case ACPI_BUS_TYPE_DEVICE: |
859ac9a4 | 1080 | if (ACPI_IS_ROOT_DEVICE(device)) { |
57f3674f | 1081 | acpi_add_id(device, ACPI_SYSTEM_HID); |
859ac9a4 | 1082 | break; |
78b8e141 BH |
1083 | } else if (ACPI_IS_ROOT_DEVICE(device->parent)) { |
1084 | /* \_SB_, the only root-level namespace device */ | |
57f3674f | 1085 | acpi_add_id(device, ACPI_BUS_HID); |
78b8e141 BH |
1086 | strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME); |
1087 | strcpy(device->pnp.device_class, ACPI_BUS_CLASS); | |
1088 | break; | |
859ac9a4 BH |
1089 | } |
1090 | ||
66b7ed40 | 1091 | status = acpi_get_object_info(device->handle, &info); |
1da177e4 | 1092 | if (ACPI_FAILURE(status)) { |
96b2dd1f | 1093 | printk(KERN_ERR PREFIX "%s: Error reading device info\n", __func__); |
1da177e4 LT |
1094 | return; |
1095 | } | |
1096 | ||
1da177e4 | 1097 | if (info->valid & ACPI_VALID_HID) |
57f3674f BH |
1098 | acpi_add_id(device, info->hardware_id.string); |
1099 | if (info->valid & ACPI_VALID_CID) { | |
15b8dd53 | 1100 | cid_list = &info->compatible_id_list; |
57f3674f BH |
1101 | for (i = 0; i < cid_list->count; i++) |
1102 | acpi_add_id(device, cid_list->ids[i].string); | |
1103 | } | |
1da177e4 LT |
1104 | if (info->valid & ACPI_VALID_ADR) { |
1105 | device->pnp.bus_address = info->address; | |
1106 | device->flags.bus_address = 1; | |
1107 | } | |
ae843332 | 1108 | |
a83893ae BH |
1109 | kfree(info); |
1110 | ||
57f3674f BH |
1111 | /* |
1112 | * Some devices don't reliably have _HIDs & _CIDs, so add | |
1113 | * synthetic HIDs to make sure drivers can find them. | |
1114 | */ | |
c3d6de69 | 1115 | if (acpi_is_video_device(device)) |
57f3674f | 1116 | acpi_add_id(device, ACPI_VIDEO_HID); |
3620f2f2 | 1117 | else if (ACPI_SUCCESS(acpi_bay_match(device))) |
57f3674f | 1118 | acpi_add_id(device, ACPI_BAY_HID); |
3620f2f2 | 1119 | else if (ACPI_SUCCESS(acpi_dock_match(device))) |
57f3674f | 1120 | acpi_add_id(device, ACPI_DOCK_HID); |
222e82ac DW |
1121 | else if (!acpi_ibm_smbus_match(device)) |
1122 | acpi_add_id(device, ACPI_SMBUS_IBM_HID); | |
54735266 | 1123 | |
1da177e4 LT |
1124 | break; |
1125 | case ACPI_BUS_TYPE_POWER: | |
57f3674f | 1126 | acpi_add_id(device, ACPI_POWER_HID); |
1da177e4 LT |
1127 | break; |
1128 | case ACPI_BUS_TYPE_PROCESSOR: | |
57f3674f | 1129 | acpi_add_id(device, ACPI_PROCESSOR_OBJECT_HID); |
1da177e4 | 1130 | break; |
1da177e4 | 1131 | case ACPI_BUS_TYPE_THERMAL: |
57f3674f | 1132 | acpi_add_id(device, ACPI_THERMAL_HID); |
1da177e4 LT |
1133 | break; |
1134 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
57f3674f | 1135 | acpi_add_id(device, ACPI_BUTTON_HID_POWERF); |
1da177e4 LT |
1136 | break; |
1137 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
57f3674f | 1138 | acpi_add_id(device, ACPI_BUTTON_HID_SLEEPF); |
1da177e4 LT |
1139 | break; |
1140 | } | |
1141 | ||
b1fbfb2a BH |
1142 | /* |
1143 | * We build acpi_devices for some objects that don't have _HID or _CID, | |
1144 | * e.g., PCI bridges and slots. Drivers can't bind to these objects, | |
1145 | * but we do use them indirectly by traversing the acpi_device tree. | |
1146 | * This generic ID isn't useful for driver binding, but it provides | |
1147 | * the useful property that "every acpi_device has an ID." | |
1148 | */ | |
57f3674f BH |
1149 | if (list_empty(&device->pnp.ids)) |
1150 | acpi_add_id(device, "device"); | |
1da177e4 LT |
1151 | } |
1152 | ||
bc3b0772 | 1153 | static int acpi_device_set_context(struct acpi_device *device) |
1da177e4 | 1154 | { |
bc3b0772 BH |
1155 | acpi_status status; |
1156 | ||
1da177e4 LT |
1157 | /* |
1158 | * Context | |
1159 | * ------- | |
1160 | * Attach this 'struct acpi_device' to the ACPI object. This makes | |
bc3b0772 BH |
1161 | * resolutions from handle->device very efficient. Fixed hardware |
1162 | * devices have no handles, so we skip them. | |
1da177e4 | 1163 | */ |
bc3b0772 BH |
1164 | if (!device->handle) |
1165 | return 0; | |
1da177e4 | 1166 | |
bc3b0772 BH |
1167 | status = acpi_attach_data(device->handle, |
1168 | acpi_bus_data_handler, device); | |
1169 | if (ACPI_SUCCESS(status)) | |
1170 | return 0; | |
1171 | ||
1172 | printk(KERN_ERR PREFIX "Error attaching device data\n"); | |
1173 | return -ENODEV; | |
1da177e4 LT |
1174 | } |
1175 | ||
4be44fcd | 1176 | static int acpi_bus_remove(struct acpi_device *dev, int rmdevice) |
1da177e4 | 1177 | { |
1da177e4 | 1178 | if (!dev) |
d550d98d | 1179 | return -EINVAL; |
1da177e4 | 1180 | |
96333578 | 1181 | dev->removal_type = ACPI_BUS_REMOVAL_EJECT; |
1890a97a | 1182 | device_release_driver(&dev->dev); |
1da177e4 LT |
1183 | |
1184 | if (!rmdevice) | |
d550d98d | 1185 | return 0; |
1da177e4 | 1186 | |
2786f6e3 RZ |
1187 | /* |
1188 | * unbind _ADR-Based Devices when hot removal | |
1189 | */ | |
1da177e4 LT |
1190 | if (dev->flags.bus_address) { |
1191 | if ((dev->parent) && (dev->parent->ops.unbind)) | |
1192 | dev->parent->ops.unbind(dev); | |
1193 | } | |
1da177e4 LT |
1194 | acpi_device_unregister(dev, ACPI_BUS_REMOVAL_EJECT); |
1195 | ||
d550d98d | 1196 | return 0; |
1da177e4 LT |
1197 | } |
1198 | ||
5c478f49 BH |
1199 | static int acpi_add_single_object(struct acpi_device **child, |
1200 | acpi_handle handle, int type, | |
778cbc1d | 1201 | unsigned long long sta, |
5c478f49 | 1202 | struct acpi_bus_ops *ops) |
1da177e4 | 1203 | { |
77c24888 BH |
1204 | int result; |
1205 | struct acpi_device *device; | |
29aaefa6 | 1206 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 1207 | |
36bcbec7 | 1208 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 1209 | if (!device) { |
6468463a | 1210 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 1211 | return -ENOMEM; |
1da177e4 | 1212 | } |
1da177e4 | 1213 | |
7f47fa6c | 1214 | INIT_LIST_HEAD(&device->pnp.ids); |
caaa6efb | 1215 | device->device_type = type; |
1da177e4 | 1216 | device->handle = handle; |
5c478f49 | 1217 | device->parent = acpi_bus_get_parent(handle); |
c4168bff | 1218 | device->bus_ops = *ops; /* workround for not call .start */ |
778cbc1d | 1219 | STRUCT_TO_INT(device->status) = sta; |
c4168bff | 1220 | |
c7bcb4e9 | 1221 | acpi_device_get_busid(device); |
1da177e4 LT |
1222 | |
1223 | /* | |
1224 | * Flags | |
1225 | * ----- | |
778cbc1d BH |
1226 | * Note that we only look for object handles -- cannot evaluate objects |
1227 | * until we know the device is present and properly initialized. | |
1da177e4 LT |
1228 | */ |
1229 | result = acpi_bus_get_flags(device); | |
1230 | if (result) | |
1231 | goto end; | |
1232 | ||
1da177e4 LT |
1233 | /* |
1234 | * Initialize Device | |
1235 | * ----------------- | |
1236 | * TBD: Synch with Core's enumeration/initialization process. | |
1237 | */ | |
c7bcb4e9 | 1238 | acpi_device_set_id(device); |
1da177e4 LT |
1239 | |
1240 | /* | |
1241 | * Power Management | |
1242 | * ---------------- | |
1243 | */ | |
1244 | if (device->flags.power_manageable) { | |
1245 | result = acpi_bus_get_power_flags(device); | |
1246 | if (result) | |
1247 | goto end; | |
1248 | } | |
1249 | ||
4be44fcd | 1250 | /* |
1da177e4 LT |
1251 | * Wakeup device management |
1252 | *----------------------- | |
1253 | */ | |
1254 | if (device->flags.wake_capable) { | |
1255 | result = acpi_bus_get_wakeup_device_flags(device); | |
1256 | if (result) | |
1257 | goto end; | |
1258 | } | |
1259 | ||
1260 | /* | |
1261 | * Performance Management | |
1262 | * ---------------------- | |
1263 | */ | |
1264 | if (device->flags.performance_manageable) { | |
1265 | result = acpi_bus_get_perf_flags(device); | |
1266 | if (result) | |
1267 | goto end; | |
1268 | } | |
1269 | ||
bc3b0772 | 1270 | if ((result = acpi_device_set_context(device))) |
f61f9258 | 1271 | goto end; |
1da177e4 | 1272 | |
66b7ed40 | 1273 | result = acpi_device_register(device); |
1da177e4 LT |
1274 | |
1275 | /* | |
2786f6e3 | 1276 | * Bind _ADR-Based Devices when hot add |
1da177e4 LT |
1277 | */ |
1278 | if (device->flags.bus_address) { | |
1279 | if (device->parent && device->parent->ops.bind) | |
1280 | device->parent->ops.bind(device); | |
1281 | } | |
1282 | ||
0c526d96 | 1283 | end: |
29aaefa6 BH |
1284 | if (!result) { |
1285 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1286 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
1287 | "Adding %s [%s] parent %s\n", dev_name(&device->dev), | |
1288 | (char *) buffer.pointer, | |
1289 | device->parent ? dev_name(&device->parent->dev) : | |
1290 | "(null)")); | |
1291 | kfree(buffer.pointer); | |
1da177e4 | 1292 | *child = device; |
29aaefa6 | 1293 | } else |
718fb0de | 1294 | acpi_device_release(&device->dev); |
1da177e4 | 1295 | |
d550d98d | 1296 | return result; |
1da177e4 | 1297 | } |
1da177e4 | 1298 | |
778cbc1d BH |
1299 | #define ACPI_STA_DEFAULT (ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | \ |
1300 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING) | |
1301 | ||
1302 | static int acpi_bus_type_and_status(acpi_handle handle, int *type, | |
1303 | unsigned long long *sta) | |
1da177e4 | 1304 | { |
778cbc1d BH |
1305 | acpi_status status; |
1306 | acpi_object_type acpi_type; | |
1da177e4 | 1307 | |
778cbc1d | 1308 | status = acpi_get_type(handle, &acpi_type); |
51a85faf | 1309 | if (ACPI_FAILURE(status)) |
778cbc1d | 1310 | return -ENODEV; |
4be44fcd | 1311 | |
778cbc1d | 1312 | switch (acpi_type) { |
51a85faf BH |
1313 | case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */ |
1314 | case ACPI_TYPE_DEVICE: | |
778cbc1d BH |
1315 | *type = ACPI_BUS_TYPE_DEVICE; |
1316 | status = acpi_bus_get_status_handle(handle, sta); | |
1317 | if (ACPI_FAILURE(status)) | |
1318 | return -ENODEV; | |
51a85faf BH |
1319 | break; |
1320 | case ACPI_TYPE_PROCESSOR: | |
778cbc1d BH |
1321 | *type = ACPI_BUS_TYPE_PROCESSOR; |
1322 | status = acpi_bus_get_status_handle(handle, sta); | |
1323 | if (ACPI_FAILURE(status)) | |
1324 | return -ENODEV; | |
51a85faf BH |
1325 | break; |
1326 | case ACPI_TYPE_THERMAL: | |
778cbc1d BH |
1327 | *type = ACPI_BUS_TYPE_THERMAL; |
1328 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1329 | break; |
1330 | case ACPI_TYPE_POWER: | |
778cbc1d BH |
1331 | *type = ACPI_BUS_TYPE_POWER; |
1332 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1333 | break; |
1334 | default: | |
778cbc1d | 1335 | return -ENODEV; |
51a85faf | 1336 | } |
1da177e4 | 1337 | |
778cbc1d BH |
1338 | return 0; |
1339 | } | |
1340 | ||
1341 | static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl, | |
1342 | void *context, void **return_value) | |
1343 | { | |
1344 | struct acpi_bus_ops *ops = context; | |
778cbc1d BH |
1345 | int type; |
1346 | unsigned long long sta; | |
e3b87f8a BH |
1347 | struct acpi_device *device; |
1348 | acpi_status status; | |
778cbc1d BH |
1349 | int result; |
1350 | ||
1351 | result = acpi_bus_type_and_status(handle, &type, &sta); | |
1352 | if (result) | |
1353 | return AE_OK; | |
1354 | ||
1355 | if (!(sta & ACPI_STA_DEVICE_PRESENT) && | |
1356 | !(sta & ACPI_STA_DEVICE_FUNCTIONING)) | |
1357 | return AE_CTRL_DEPTH; | |
1358 | ||
e3b87f8a BH |
1359 | /* |
1360 | * We may already have an acpi_device from a previous enumeration. If | |
1361 | * so, we needn't add it again, but we may still have to start it. | |
1362 | */ | |
1363 | device = NULL; | |
1364 | acpi_bus_get_device(handle, &device); | |
1365 | if (ops->acpi_op_add && !device) | |
1366 | acpi_add_single_object(&device, handle, type, sta, ops); | |
1da177e4 | 1367 | |
e3b87f8a | 1368 | if (!device) |
51a85faf | 1369 | return AE_CTRL_DEPTH; |
1da177e4 | 1370 | |
51a85faf BH |
1371 | if (ops->acpi_op_start && !(ops->acpi_op_add)) { |
1372 | status = acpi_start_single_object(device); | |
1da177e4 | 1373 | if (ACPI_FAILURE(status)) |
51a85faf BH |
1374 | return AE_CTRL_DEPTH; |
1375 | } | |
1da177e4 | 1376 | |
51a85faf BH |
1377 | if (!*return_value) |
1378 | *return_value = device; | |
1379 | return AE_OK; | |
1380 | } | |
3fb02738 | 1381 | |
51a85faf BH |
1382 | static int acpi_bus_scan(acpi_handle handle, struct acpi_bus_ops *ops, |
1383 | struct acpi_device **child) | |
1384 | { | |
1385 | acpi_status status; | |
51a85faf | 1386 | void *device = NULL; |
3fb02738 | 1387 | |
51a85faf BH |
1388 | status = acpi_bus_check_add(handle, 0, ops, &device); |
1389 | if (ACPI_SUCCESS(status)) | |
1390 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
2263576c | 1391 | acpi_bus_check_add, NULL, ops, &device); |
1da177e4 | 1392 | |
51a85faf BH |
1393 | if (child) |
1394 | *child = device; | |
7779688f TR |
1395 | |
1396 | if (device) | |
1397 | return 0; | |
1398 | else | |
1399 | return -ENODEV; | |
1da177e4 | 1400 | } |
1da177e4 | 1401 | |
7779688f TR |
1402 | /* |
1403 | * acpi_bus_add and acpi_bus_start | |
1404 | * | |
1405 | * scan a given ACPI tree and (probably recently hot-plugged) | |
1406 | * create and add or starts found devices. | |
1407 | * | |
1408 | * If no devices were found -ENODEV is returned which does not | |
1409 | * mean that this is a real error, there just have been no suitable | |
1410 | * ACPI objects in the table trunk from which the kernel could create | |
1411 | * a device and add/start an appropriate driver. | |
1412 | */ | |
1413 | ||
3fb02738 | 1414 | int |
4be44fcd LB |
1415 | acpi_bus_add(struct acpi_device **child, |
1416 | struct acpi_device *parent, acpi_handle handle, int type) | |
3fb02738 | 1417 | { |
3fb02738 RS |
1418 | struct acpi_bus_ops ops; |
1419 | ||
c4168bff LS |
1420 | memset(&ops, 0, sizeof(ops)); |
1421 | ops.acpi_op_add = 1; | |
3fb02738 | 1422 | |
7779688f | 1423 | return acpi_bus_scan(handle, &ops, child); |
3fb02738 RS |
1424 | } |
1425 | EXPORT_SYMBOL(acpi_bus_add); | |
1426 | ||
4be44fcd | 1427 | int acpi_bus_start(struct acpi_device *device) |
3fb02738 | 1428 | { |
3fb02738 RS |
1429 | struct acpi_bus_ops ops; |
1430 | ||
d2f6650a TR |
1431 | if (!device) |
1432 | return -EINVAL; | |
1433 | ||
8e029bf0 BH |
1434 | memset(&ops, 0, sizeof(ops)); |
1435 | ops.acpi_op_start = 1; | |
3fb02738 | 1436 | |
7779688f | 1437 | return acpi_bus_scan(device->handle, &ops, NULL); |
3fb02738 RS |
1438 | } |
1439 | EXPORT_SYMBOL(acpi_bus_start); | |
1da177e4 | 1440 | |
ceaba663 | 1441 | int acpi_bus_trim(struct acpi_device *start, int rmdevice) |
1da177e4 | 1442 | { |
4be44fcd LB |
1443 | acpi_status status; |
1444 | struct acpi_device *parent, *child; | |
1445 | acpi_handle phandle, chandle; | |
1446 | acpi_object_type type; | |
1447 | u32 level = 1; | |
1448 | int err = 0; | |
1449 | ||
1450 | parent = start; | |
1da177e4 LT |
1451 | phandle = start->handle; |
1452 | child = chandle = NULL; | |
1453 | ||
1454 | while ((level > 0) && parent && (!err)) { | |
1455 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, | |
4be44fcd | 1456 | chandle, &chandle); |
1da177e4 LT |
1457 | |
1458 | /* | |
1459 | * If this scope is exhausted then move our way back up. | |
1460 | */ | |
1461 | if (ACPI_FAILURE(status)) { | |
1462 | level--; | |
1463 | chandle = phandle; | |
1464 | acpi_get_parent(phandle, &phandle); | |
1465 | child = parent; | |
1466 | parent = parent->parent; | |
1467 | ||
1468 | if (level == 0) | |
1469 | err = acpi_bus_remove(child, rmdevice); | |
1470 | else | |
1471 | err = acpi_bus_remove(child, 1); | |
1472 | ||
1473 | continue; | |
1474 | } | |
1475 | ||
1476 | status = acpi_get_type(chandle, &type); | |
1477 | if (ACPI_FAILURE(status)) { | |
1478 | continue; | |
1479 | } | |
1480 | /* | |
1481 | * If there is a device corresponding to chandle then | |
1482 | * parse it (depth-first). | |
1483 | */ | |
1484 | if (acpi_bus_get_device(chandle, &child) == 0) { | |
1485 | level++; | |
1486 | phandle = chandle; | |
1487 | chandle = NULL; | |
1488 | parent = child; | |
1489 | } | |
1490 | continue; | |
1491 | } | |
1492 | return err; | |
1493 | } | |
ceaba663 KA |
1494 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
1495 | ||
e8b945c9 | 1496 | static int acpi_bus_scan_fixed(void) |
1da177e4 | 1497 | { |
4be44fcd LB |
1498 | int result = 0; |
1499 | struct acpi_device *device = NULL; | |
c4168bff | 1500 | struct acpi_bus_ops ops; |
1da177e4 | 1501 | |
c4168bff LS |
1502 | memset(&ops, 0, sizeof(ops)); |
1503 | ops.acpi_op_add = 1; | |
1504 | ops.acpi_op_start = 1; | |
1505 | ||
1da177e4 LT |
1506 | /* |
1507 | * Enumerate all fixed-feature devices. | |
1508 | */ | |
cee324b1 | 1509 | if ((acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON) == 0) { |
5c478f49 | 1510 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1511 | ACPI_BUS_TYPE_POWER_BUTTON, |
778cbc1d | 1512 | ACPI_STA_DEFAULT, |
c4168bff | 1513 | &ops); |
3fb02738 | 1514 | } |
1da177e4 | 1515 | |
cee324b1 | 1516 | if ((acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON) == 0) { |
5c478f49 | 1517 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1518 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
778cbc1d | 1519 | ACPI_STA_DEFAULT, |
c4168bff | 1520 | &ops); |
3fb02738 | 1521 | } |
1da177e4 | 1522 | |
d550d98d | 1523 | return result; |
1da177e4 LT |
1524 | } |
1525 | ||
e747f274 | 1526 | int __init acpi_scan_init(void) |
1da177e4 LT |
1527 | { |
1528 | int result; | |
3fb02738 | 1529 | struct acpi_bus_ops ops; |
1da177e4 | 1530 | |
c4168bff LS |
1531 | memset(&ops, 0, sizeof(ops)); |
1532 | ops.acpi_op_add = 1; | |
1533 | ops.acpi_op_start = 1; | |
1da177e4 | 1534 | |
5b327265 PM |
1535 | result = bus_register(&acpi_bus_type); |
1536 | if (result) { | |
1537 | /* We don't want to quit even if we failed to add suspend/resume */ | |
1538 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
1539 | } | |
1540 | ||
1da177e4 LT |
1541 | /* |
1542 | * Enumerate devices in the ACPI namespace. | |
1543 | */ | |
51a85faf | 1544 | result = acpi_bus_scan(ACPI_ROOT_OBJECT, &ops, &acpi_root); |
c04209a7 | 1545 | |
c4168bff | 1546 | if (!result) |
adc08e20 | 1547 | result = acpi_bus_scan_fixed(); |
1da177e4 LT |
1548 | |
1549 | if (result) | |
1550 | acpi_device_unregister(acpi_root, ACPI_BUS_REMOVAL_NORMAL); | |
1551 | ||
d550d98d | 1552 | return result; |
1da177e4 | 1553 | } |