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 | ||
25 | static LIST_HEAD(acpi_device_list); | |
e49bd2dd | 26 | static LIST_HEAD(acpi_bus_id_list); |
1da177e4 LT |
27 | DEFINE_SPINLOCK(acpi_device_lock); |
28 | LIST_HEAD(acpi_wakeup_device_list); | |
29 | ||
e49bd2dd | 30 | struct acpi_device_bus_id{ |
bb095854 | 31 | char bus_id[15]; |
e49bd2dd ZR |
32 | unsigned int instance_no; |
33 | struct list_head node; | |
1da177e4 | 34 | }; |
29b71a1c TR |
35 | |
36 | /* | |
37 | * Creates hid/cid(s) string needed for modalias and uevent | |
38 | * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: | |
39 | * char *modalias: "acpi:IBM0001:ACPI0001" | |
40 | */ | |
b3e572d2 AB |
41 | static int create_modalias(struct acpi_device *acpi_dev, char *modalias, |
42 | int size) | |
43 | { | |
29b71a1c | 44 | int len; |
5c9fcb5d | 45 | int count; |
29b71a1c | 46 | |
5c9fcb5d | 47 | if (!acpi_dev->flags.hardware_id && !acpi_dev->flags.compatible_ids) |
29b71a1c TR |
48 | return -ENODEV; |
49 | ||
5c9fcb5d | 50 | len = snprintf(modalias, size, "acpi:"); |
29b71a1c TR |
51 | size -= len; |
52 | ||
5c9fcb5d ZR |
53 | if (acpi_dev->flags.hardware_id) { |
54 | count = snprintf(&modalias[len], size, "%s:", | |
55 | acpi_dev->pnp.hardware_id); | |
56 | if (count < 0 || count >= size) | |
57 | return -EINVAL; | |
58 | len += count; | |
59 | size -= count; | |
60 | } | |
61 | ||
29b71a1c TR |
62 | if (acpi_dev->flags.compatible_ids) { |
63 | struct acpi_compatible_id_list *cid_list; | |
64 | int i; | |
29b71a1c TR |
65 | |
66 | cid_list = acpi_dev->pnp.cid_list; | |
67 | for (i = 0; i < cid_list->count; i++) { | |
68 | count = snprintf(&modalias[len], size, "%s:", | |
69 | cid_list->id[i].value); | |
70 | if (count < 0 || count >= size) { | |
87ecd5cd | 71 | printk(KERN_ERR PREFIX "%s cid[%i] exceeds event buffer size", |
29b71a1c TR |
72 | acpi_dev->pnp.device_name, i); |
73 | break; | |
74 | } | |
75 | len += count; | |
76 | size -= count; | |
77 | } | |
78 | } | |
79 | ||
80 | modalias[len] = '\0'; | |
81 | return len; | |
82 | } | |
83 | ||
84 | static ssize_t | |
85 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
86 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
87 | int len; | |
88 | ||
89 | /* Device has no HID and no CID or string is >1024 */ | |
90 | len = create_modalias(acpi_dev, buf, 1024); | |
91 | if (len <= 0) | |
92 | return 0; | |
93 | buf[len++] = '\n'; | |
94 | return len; | |
95 | } | |
96 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); | |
97 | ||
26d46867 | 98 | static int acpi_bus_hot_remove_device(void *context) |
1da177e4 | 99 | { |
26d46867 ZR |
100 | struct acpi_device *device; |
101 | acpi_handle handle = context; | |
1da177e4 LT |
102 | struct acpi_object_list arg_list; |
103 | union acpi_object arg; | |
104 | acpi_status status = AE_OK; | |
1da177e4 | 105 | |
26d46867 ZR |
106 | if (acpi_bus_get_device(handle, &device)) |
107 | return 0; | |
108 | ||
109 | if (!device) | |
110 | return 0; | |
111 | ||
112 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
0794469d | 113 | "Hot-removing device %s...\n", dev_name(&device->dev))); |
26d46867 ZR |
114 | |
115 | if (acpi_bus_trim(device, 1)) { | |
55ac9a01 LM |
116 | printk(KERN_ERR PREFIX |
117 | "Removing device failed\n"); | |
26d46867 ZR |
118 | return -1; |
119 | } | |
1da177e4 | 120 | |
26d46867 ZR |
121 | /* power off device */ |
122 | status = acpi_evaluate_object(handle, "_PS3", NULL, NULL); | |
123 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) | |
55ac9a01 LM |
124 | printk(KERN_WARNING PREFIX |
125 | "Power-off device failed\n"); | |
26d46867 ZR |
126 | |
127 | if (device->flags.lockable) { | |
1da177e4 LT |
128 | arg_list.count = 1; |
129 | arg_list.pointer = &arg; | |
130 | arg.type = ACPI_TYPE_INTEGER; | |
131 | arg.integer.value = 0; | |
132 | acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); | |
133 | } | |
1da177e4 | 134 | |
1da177e4 LT |
135 | arg_list.count = 1; |
136 | arg_list.pointer = &arg; | |
137 | arg.type = ACPI_TYPE_INTEGER; | |
138 | arg.integer.value = 1; | |
1da177e4 | 139 | |
1da177e4 LT |
140 | /* |
141 | * TBD: _EJD support. | |
142 | */ | |
1da177e4 | 143 | status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); |
26d46867 ZR |
144 | if (ACPI_FAILURE(status)) |
145 | return -ENODEV; | |
1da177e4 | 146 | |
26d46867 | 147 | return 0; |
1da177e4 LT |
148 | } |
149 | ||
1da177e4 | 150 | static ssize_t |
f883d9db PM |
151 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
152 | const char *buf, size_t count) | |
1da177e4 | 153 | { |
4be44fcd | 154 | int ret = count; |
4be44fcd | 155 | acpi_status status; |
4be44fcd | 156 | acpi_object_type type = 0; |
f883d9db | 157 | struct acpi_device *acpi_device = to_acpi_device(d); |
74523c90 | 158 | struct task_struct *task; |
1da177e4 | 159 | |
1da177e4 LT |
160 | if ((!count) || (buf[0] != '1')) { |
161 | return -EINVAL; | |
162 | } | |
1da177e4 | 163 | #ifndef FORCE_EJECT |
f883d9db | 164 | if (acpi_device->driver == NULL) { |
1da177e4 LT |
165 | ret = -ENODEV; |
166 | goto err; | |
167 | } | |
168 | #endif | |
f883d9db PM |
169 | status = acpi_get_type(acpi_device->handle, &type); |
170 | if (ACPI_FAILURE(status) || (!acpi_device->flags.ejectable)) { | |
1da177e4 LT |
171 | ret = -ENODEV; |
172 | goto err; | |
173 | } | |
1da177e4 | 174 | |
26d46867 | 175 | /* remove the device in another thread to fix the deadlock issue */ |
74523c90 AK |
176 | task = kthread_run(acpi_bus_hot_remove_device, |
177 | acpi_device->handle, "acpi_hot_remove_device"); | |
178 | if (IS_ERR(task)) | |
179 | ret = PTR_ERR(task); | |
180 | err: | |
1da177e4 | 181 | return ret; |
1da177e4 LT |
182 | } |
183 | ||
f883d9db | 184 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
1da177e4 | 185 | |
e49bd2dd ZR |
186 | static ssize_t |
187 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
188 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1da177e4 | 189 | |
e49bd2dd | 190 | return sprintf(buf, "%s\n", acpi_dev->pnp.hardware_id); |
1da177e4 | 191 | } |
e49bd2dd | 192 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
1da177e4 | 193 | |
e49bd2dd ZR |
194 | static ssize_t |
195 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
196 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
197 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
198 | int result; | |
1da177e4 | 199 | |
e49bd2dd ZR |
200 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
201 | if(result) | |
202 | goto end; | |
1da177e4 | 203 | |
e49bd2dd ZR |
204 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
205 | kfree(path.pointer); | |
206 | end: | |
207 | return result; | |
1da177e4 | 208 | } |
e49bd2dd | 209 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
1da177e4 | 210 | |
e49bd2dd | 211 | static int acpi_device_setup_files(struct acpi_device *dev) |
1da177e4 | 212 | { |
f883d9db PM |
213 | acpi_status status; |
214 | acpi_handle temp; | |
e49bd2dd | 215 | int result = 0; |
1da177e4 LT |
216 | |
217 | /* | |
e49bd2dd | 218 | * Devices gotten from FADT don't have a "path" attribute |
1da177e4 | 219 | */ |
e49bd2dd ZR |
220 | if(dev->handle) { |
221 | result = device_create_file(&dev->dev, &dev_attr_path); | |
222 | if(result) | |
223 | goto end; | |
1da177e4 LT |
224 | } |
225 | ||
e49bd2dd ZR |
226 | if(dev->flags.hardware_id) { |
227 | result = device_create_file(&dev->dev, &dev_attr_hid); | |
228 | if(result) | |
229 | goto end; | |
230 | } | |
1da177e4 | 231 | |
29b71a1c TR |
232 | if (dev->flags.hardware_id || dev->flags.compatible_ids){ |
233 | result = device_create_file(&dev->dev, &dev_attr_modalias); | |
234 | if(result) | |
235 | goto end; | |
236 | } | |
237 | ||
e49bd2dd ZR |
238 | /* |
239 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
240 | * hot-removal function from userland. | |
241 | */ | |
f883d9db PM |
242 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); |
243 | if (ACPI_SUCCESS(status)) | |
e49bd2dd ZR |
244 | result = device_create_file(&dev->dev, &dev_attr_eject); |
245 | end: | |
246 | return result; | |
1da177e4 LT |
247 | } |
248 | ||
f883d9db | 249 | static void acpi_device_remove_files(struct acpi_device *dev) |
1da177e4 | 250 | { |
f883d9db PM |
251 | acpi_status status; |
252 | acpi_handle temp; | |
1da177e4 | 253 | |
f883d9db PM |
254 | /* |
255 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
256 | * hot-removal function from userland. | |
257 | */ | |
258 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); | |
259 | if (ACPI_SUCCESS(status)) | |
260 | device_remove_file(&dev->dev, &dev_attr_eject); | |
1da177e4 | 261 | |
29b71a1c TR |
262 | if (dev->flags.hardware_id || dev->flags.compatible_ids) |
263 | device_remove_file(&dev->dev, &dev_attr_modalias); | |
264 | ||
e49bd2dd ZR |
265 | if(dev->flags.hardware_id) |
266 | device_remove_file(&dev->dev, &dev_attr_hid); | |
267 | if(dev->handle) | |
268 | device_remove_file(&dev->dev, &dev_attr_path); | |
1da177e4 | 269 | } |
1da177e4 | 270 | /* -------------------------------------------------------------------------- |
9e89dde2 | 271 | ACPI Bus operations |
1da177e4 | 272 | -------------------------------------------------------------------------- */ |
29b71a1c TR |
273 | |
274 | int acpi_match_device_ids(struct acpi_device *device, | |
275 | const struct acpi_device_id *ids) | |
276 | { | |
277 | const struct acpi_device_id *id; | |
278 | ||
39a0ad87 ZY |
279 | /* |
280 | * If the device is not present, it is unnecessary to load device | |
281 | * driver for it. | |
282 | */ | |
283 | if (!device->status.present) | |
284 | return -ENODEV; | |
285 | ||
29b71a1c TR |
286 | if (device->flags.hardware_id) { |
287 | for (id = ids; id->id[0]; id++) { | |
288 | if (!strcmp((char*)id->id, device->pnp.hardware_id)) | |
289 | return 0; | |
290 | } | |
291 | } | |
292 | ||
293 | if (device->flags.compatible_ids) { | |
294 | struct acpi_compatible_id_list *cid_list = device->pnp.cid_list; | |
295 | int i; | |
296 | ||
297 | for (id = ids; id->id[0]; id++) { | |
298 | /* compare multiple _CID entries against driver ids */ | |
299 | for (i = 0; i < cid_list->count; i++) { | |
300 | if (!strcmp((char*)id->id, | |
301 | cid_list->id[i].value)) | |
302 | return 0; | |
303 | } | |
304 | } | |
305 | } | |
306 | ||
307 | return -ENOENT; | |
308 | } | |
309 | EXPORT_SYMBOL(acpi_match_device_ids); | |
310 | ||
1890a97a | 311 | static void acpi_device_release(struct device *dev) |
1da177e4 | 312 | { |
1890a97a | 313 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 314 | |
1890a97a PM |
315 | kfree(acpi_dev->pnp.cid_list); |
316 | kfree(acpi_dev); | |
1da177e4 LT |
317 | } |
318 | ||
5d9464a4 | 319 | static int acpi_device_suspend(struct device *dev, pm_message_t state) |
1da177e4 | 320 | { |
5d9464a4 PM |
321 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
322 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
1da177e4 | 323 | |
5d9464a4 PM |
324 | if (acpi_drv && acpi_drv->ops.suspend) |
325 | return acpi_drv->ops.suspend(acpi_dev, state); | |
1da177e4 LT |
326 | return 0; |
327 | } | |
1da177e4 | 328 | |
5d9464a4 | 329 | static int acpi_device_resume(struct device *dev) |
9e89dde2 | 330 | { |
5d9464a4 PM |
331 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
332 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
1da177e4 | 333 | |
5d9464a4 PM |
334 | if (acpi_drv && acpi_drv->ops.resume) |
335 | return acpi_drv->ops.resume(acpi_dev); | |
d550d98d | 336 | return 0; |
1da177e4 LT |
337 | } |
338 | ||
5d9464a4 | 339 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 340 | { |
5d9464a4 PM |
341 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
342 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
1da177e4 | 343 | |
29b71a1c | 344 | return !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
5d9464a4 | 345 | } |
1da177e4 | 346 | |
7eff2e7a | 347 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 | 348 | { |
5d9464a4 | 349 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
7eff2e7a | 350 | int len; |
5d9464a4 | 351 | |
7eff2e7a KS |
352 | if (add_uevent_var(env, "MODALIAS=")) |
353 | return -ENOMEM; | |
354 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], | |
355 | sizeof(env->buf) - env->buflen); | |
356 | if (len >= (sizeof(env->buf) - env->buflen)) | |
357 | return -ENOMEM; | |
358 | env->buflen += len; | |
9e89dde2 | 359 | return 0; |
1da177e4 LT |
360 | } |
361 | ||
5d9464a4 PM |
362 | static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *); |
363 | static int acpi_start_single_object(struct acpi_device *); | |
364 | static int acpi_device_probe(struct device * dev) | |
1da177e4 | 365 | { |
5d9464a4 PM |
366 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
367 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
368 | int ret; | |
369 | ||
370 | ret = acpi_bus_driver_init(acpi_dev, acpi_drv); | |
371 | if (!ret) { | |
c4168bff LS |
372 | if (acpi_dev->bus_ops.acpi_op_start) |
373 | acpi_start_single_object(acpi_dev); | |
5d9464a4 PM |
374 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
375 | "Found driver [%s] for device [%s]\n", | |
376 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
377 | get_device(dev); | |
378 | } | |
379 | return ret; | |
380 | } | |
1da177e4 | 381 | |
5d9464a4 PM |
382 | static int acpi_device_remove(struct device * dev) |
383 | { | |
384 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
385 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
386 | ||
387 | if (acpi_drv) { | |
388 | if (acpi_drv->ops.stop) | |
96333578 | 389 | acpi_drv->ops.stop(acpi_dev, acpi_dev->removal_type); |
5d9464a4 | 390 | if (acpi_drv->ops.remove) |
96333578 | 391 | acpi_drv->ops.remove(acpi_dev, acpi_dev->removal_type); |
1da177e4 | 392 | } |
5d9464a4 | 393 | acpi_dev->driver = NULL; |
db89b4f0 | 394 | acpi_dev->driver_data = NULL; |
1da177e4 | 395 | |
5d9464a4 | 396 | put_device(dev); |
9e89dde2 ZR |
397 | return 0; |
398 | } | |
1da177e4 | 399 | |
5d9464a4 | 400 | static void acpi_device_shutdown(struct device *dev) |
1da177e4 | 401 | { |
5d9464a4 PM |
402 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
403 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
1da177e4 | 404 | |
5d9464a4 PM |
405 | if (acpi_drv && acpi_drv->ops.shutdown) |
406 | acpi_drv->ops.shutdown(acpi_dev); | |
1da177e4 | 407 | |
5d9464a4 | 408 | return ; |
1da177e4 LT |
409 | } |
410 | ||
55955aad | 411 | struct bus_type acpi_bus_type = { |
9e89dde2 ZR |
412 | .name = "acpi", |
413 | .suspend = acpi_device_suspend, | |
414 | .resume = acpi_device_resume, | |
5d9464a4 PM |
415 | .shutdown = acpi_device_shutdown, |
416 | .match = acpi_bus_match, | |
417 | .probe = acpi_device_probe, | |
418 | .remove = acpi_device_remove, | |
419 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
420 | }; |
421 | ||
e49bd2dd | 422 | static int acpi_device_register(struct acpi_device *device, |
9e89dde2 | 423 | struct acpi_device *parent) |
1da177e4 | 424 | { |
4be44fcd | 425 | int result; |
e49bd2dd ZR |
426 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
427 | int found = 0; | |
9e89dde2 ZR |
428 | /* |
429 | * Linkage | |
430 | * ------- | |
431 | * Link this device to its parent and siblings. | |
432 | */ | |
433 | INIT_LIST_HEAD(&device->children); | |
434 | INIT_LIST_HEAD(&device->node); | |
435 | INIT_LIST_HEAD(&device->g_list); | |
436 | INIT_LIST_HEAD(&device->wakeup_list); | |
1da177e4 | 437 | |
e49bd2dd ZR |
438 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
439 | if (!new_bus_id) { | |
440 | printk(KERN_ERR PREFIX "Memory allocation error\n"); | |
441 | return -ENOMEM; | |
1da177e4 | 442 | } |
e49bd2dd | 443 | |
9e89dde2 | 444 | spin_lock(&acpi_device_lock); |
e49bd2dd ZR |
445 | /* |
446 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
447 | * If failed, create one and link it into acpi_bus_id_list | |
448 | */ | |
449 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
bb095854 | 450 | if(!strcmp(acpi_device_bus_id->bus_id, device->flags.hardware_id? device->pnp.hardware_id : "device")) { |
e49bd2dd ZR |
451 | acpi_device_bus_id->instance_no ++; |
452 | found = 1; | |
453 | kfree(new_bus_id); | |
454 | break; | |
455 | } | |
1da177e4 | 456 | } |
e49bd2dd ZR |
457 | if(!found) { |
458 | acpi_device_bus_id = new_bus_id; | |
bb095854 | 459 | strcpy(acpi_device_bus_id->bus_id, device->flags.hardware_id ? device->pnp.hardware_id : "device"); |
e49bd2dd ZR |
460 | acpi_device_bus_id->instance_no = 0; |
461 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 462 | } |
0794469d | 463 | dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 464 | |
9e89dde2 ZR |
465 | if (device->parent) { |
466 | list_add_tail(&device->node, &device->parent->children); | |
467 | list_add_tail(&device->g_list, &device->parent->g_list); | |
468 | } else | |
469 | list_add_tail(&device->g_list, &acpi_device_list); | |
470 | if (device->wakeup.flags.valid) | |
471 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
472 | spin_unlock(&acpi_device_lock); | |
1da177e4 | 473 | |
1890a97a PM |
474 | if (device->parent) |
475 | device->dev.parent = &parent->dev; | |
476 | device->dev.bus = &acpi_bus_type; | |
477 | device_initialize(&device->dev); | |
1890a97a | 478 | device->dev.release = &acpi_device_release; |
e49bd2dd ZR |
479 | result = device_add(&device->dev); |
480 | if(result) { | |
fc3a8828 | 481 | dev_err(&device->dev, "Error adding device\n"); |
e49bd2dd | 482 | goto end; |
1da177e4 | 483 | } |
1da177e4 | 484 | |
e49bd2dd ZR |
485 | result = acpi_device_setup_files(device); |
486 | if(result) | |
0794469d KS |
487 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
488 | dev_name(&device->dev)); | |
1da177e4 | 489 | |
96333578 | 490 | device->removal_type = ACPI_BUS_REMOVAL_NORMAL; |
1da177e4 | 491 | return 0; |
e49bd2dd ZR |
492 | end: |
493 | spin_lock(&acpi_device_lock); | |
494 | if (device->parent) { | |
495 | list_del(&device->node); | |
496 | list_del(&device->g_list); | |
497 | } else | |
498 | list_del(&device->g_list); | |
499 | list_del(&device->wakeup_list); | |
500 | spin_unlock(&acpi_device_lock); | |
501 | return result; | |
1da177e4 LT |
502 | } |
503 | ||
9e89dde2 ZR |
504 | static void acpi_device_unregister(struct acpi_device *device, int type) |
505 | { | |
506 | spin_lock(&acpi_device_lock); | |
507 | if (device->parent) { | |
508 | list_del(&device->node); | |
509 | list_del(&device->g_list); | |
510 | } else | |
511 | list_del(&device->g_list); | |
1da177e4 | 512 | |
9e89dde2 | 513 | list_del(&device->wakeup_list); |
9e89dde2 | 514 | spin_unlock(&acpi_device_lock); |
1da177e4 | 515 | |
9e89dde2 | 516 | acpi_detach_data(device->handle, acpi_bus_data_handler); |
1890a97a | 517 | |
f883d9db | 518 | acpi_device_remove_files(device); |
1890a97a | 519 | device_unregister(&device->dev); |
1da177e4 LT |
520 | } |
521 | ||
9e89dde2 ZR |
522 | /* -------------------------------------------------------------------------- |
523 | Driver Management | |
524 | -------------------------------------------------------------------------- */ | |
1da177e4 | 525 | /** |
d758a8fa RD |
526 | * acpi_bus_driver_init - add a device to a driver |
527 | * @device: the device to add and initialize | |
528 | * @driver: driver for the device | |
529 | * | |
1da177e4 | 530 | * Used to initialize a device via its device driver. Called whenever a |
1890a97a | 531 | * driver is bound to a device. Invokes the driver's add() ops. |
1da177e4 LT |
532 | */ |
533 | static int | |
4be44fcd | 534 | acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) |
1da177e4 | 535 | { |
4be44fcd | 536 | int result = 0; |
1da177e4 | 537 | |
1da177e4 LT |
538 | |
539 | if (!device || !driver) | |
d550d98d | 540 | return -EINVAL; |
1da177e4 LT |
541 | |
542 | if (!driver->ops.add) | |
d550d98d | 543 | return -ENOSYS; |
1da177e4 LT |
544 | |
545 | result = driver->ops.add(device); | |
546 | if (result) { | |
547 | device->driver = NULL; | |
db89b4f0 | 548 | device->driver_data = NULL; |
d550d98d | 549 | return result; |
1da177e4 LT |
550 | } |
551 | ||
552 | device->driver = driver; | |
553 | ||
554 | /* | |
555 | * TBD - Configuration Management: Assign resources to device based | |
556 | * upon possible configuration and currently allocated resources. | |
557 | */ | |
558 | ||
4be44fcd LB |
559 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
560 | "Driver successfully bound to device\n")); | |
d550d98d | 561 | return 0; |
3fb02738 RS |
562 | } |
563 | ||
8713cbef | 564 | static int acpi_start_single_object(struct acpi_device *device) |
3fb02738 RS |
565 | { |
566 | int result = 0; | |
567 | struct acpi_driver *driver; | |
568 | ||
3fb02738 RS |
569 | |
570 | if (!(driver = device->driver)) | |
d550d98d | 571 | return 0; |
3fb02738 | 572 | |
1da177e4 LT |
573 | if (driver->ops.start) { |
574 | result = driver->ops.start(device); | |
575 | if (result && driver->ops.remove) | |
576 | driver->ops.remove(device, ACPI_BUS_REMOVAL_NORMAL); | |
1da177e4 LT |
577 | } |
578 | ||
d550d98d | 579 | return result; |
1da177e4 LT |
580 | } |
581 | ||
9e89dde2 ZR |
582 | /** |
583 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
584 | * @driver: driver being registered | |
585 | * | |
586 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
587 | * devices that match the driver's criteria and binds. Returns zero for | |
588 | * success or a negative error status for failure. | |
589 | */ | |
590 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
1da177e4 | 591 | { |
1890a97a | 592 | int ret; |
1da177e4 | 593 | |
9e89dde2 ZR |
594 | if (acpi_disabled) |
595 | return -ENODEV; | |
1890a97a PM |
596 | driver->drv.name = driver->name; |
597 | driver->drv.bus = &acpi_bus_type; | |
598 | driver->drv.owner = driver->owner; | |
1da177e4 | 599 | |
1890a97a PM |
600 | ret = driver_register(&driver->drv); |
601 | return ret; | |
9e89dde2 | 602 | } |
1da177e4 | 603 | |
9e89dde2 ZR |
604 | EXPORT_SYMBOL(acpi_bus_register_driver); |
605 | ||
606 | /** | |
607 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus | |
608 | * @driver: driver to unregister | |
609 | * | |
610 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
611 | * devices that match the driver's criteria and unbinds. | |
612 | */ | |
613 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
614 | { | |
1890a97a | 615 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
616 | } |
617 | ||
618 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
619 | ||
9e89dde2 ZR |
620 | /* -------------------------------------------------------------------------- |
621 | Device Enumeration | |
622 | -------------------------------------------------------------------------- */ | |
623 | acpi_status | |
624 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
625 | { | |
626 | acpi_status status; | |
627 | acpi_handle tmp; | |
628 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
629 | union acpi_object *obj; | |
630 | ||
631 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
632 | if (ACPI_FAILURE(status)) | |
633 | return status; | |
634 | ||
635 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
636 | if (ACPI_SUCCESS(status)) { | |
637 | obj = buffer.pointer; | |
3b5fee59 HM |
638 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
639 | ejd); | |
9e89dde2 ZR |
640 | kfree(buffer.pointer); |
641 | } | |
642 | return status; | |
643 | } | |
644 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
645 | ||
646 | void acpi_bus_data_handler(acpi_handle handle, u32 function, void *context) | |
647 | { | |
648 | ||
649 | /* TBD */ | |
650 | ||
651 | return; | |
652 | } | |
653 | ||
9e89dde2 ZR |
654 | static int acpi_bus_get_perf_flags(struct acpi_device *device) |
655 | { | |
656 | device->performance.state = ACPI_STATE_UNKNOWN; | |
657 | return 0; | |
658 | } | |
659 | ||
660 | static acpi_status | |
661 | acpi_bus_extract_wakeup_device_power_package(struct acpi_device *device, | |
662 | union acpi_object *package) | |
663 | { | |
664 | int i = 0; | |
665 | union acpi_object *element = NULL; | |
666 | ||
667 | if (!device || !package || (package->package.count < 2)) | |
668 | return AE_BAD_PARAMETER; | |
669 | ||
670 | element = &(package->package.elements[0]); | |
671 | if (!element) | |
672 | return AE_BAD_PARAMETER; | |
673 | if (element->type == ACPI_TYPE_PACKAGE) { | |
674 | if ((element->package.count < 2) || | |
675 | (element->package.elements[0].type != | |
676 | ACPI_TYPE_LOCAL_REFERENCE) | |
677 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) | |
678 | return AE_BAD_DATA; | |
679 | device->wakeup.gpe_device = | |
680 | element->package.elements[0].reference.handle; | |
681 | device->wakeup.gpe_number = | |
682 | (u32) element->package.elements[1].integer.value; | |
683 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
684 | device->wakeup.gpe_number = element->integer.value; | |
685 | } else | |
686 | return AE_BAD_DATA; | |
687 | ||
688 | element = &(package->package.elements[1]); | |
689 | if (element->type != ACPI_TYPE_INTEGER) { | |
690 | return AE_BAD_DATA; | |
691 | } | |
692 | device->wakeup.sleep_state = element->integer.value; | |
693 | ||
694 | if ((package->package.count - 2) > ACPI_MAX_HANDLES) { | |
695 | return AE_NO_MEMORY; | |
696 | } | |
697 | device->wakeup.resources.count = package->package.count - 2; | |
698 | for (i = 0; i < device->wakeup.resources.count; i++) { | |
699 | element = &(package->package.elements[i + 2]); | |
cd0b2248 | 700 | if (element->type != ACPI_TYPE_LOCAL_REFERENCE) |
9e89dde2 | 701 | return AE_BAD_DATA; |
9e89dde2 ZR |
702 | |
703 | device->wakeup.resources.handles[i] = element->reference.handle; | |
1da177e4 | 704 | } |
9e89dde2 ZR |
705 | |
706 | return AE_OK; | |
1da177e4 LT |
707 | } |
708 | ||
9e89dde2 | 709 | static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
1da177e4 | 710 | { |
9e89dde2 ZR |
711 | acpi_status status = 0; |
712 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
713 | union acpi_object *package = NULL; | |
77e76609 | 714 | int psw_error; |
1da177e4 | 715 | |
29b71a1c TR |
716 | struct acpi_device_id button_device_ids[] = { |
717 | {"PNP0C0D", 0}, | |
718 | {"PNP0C0C", 0}, | |
719 | {"PNP0C0E", 0}, | |
720 | {"", 0}, | |
721 | }; | |
722 | ||
9e89dde2 ZR |
723 | /* _PRW */ |
724 | status = acpi_evaluate_object(device->handle, "_PRW", NULL, &buffer); | |
725 | if (ACPI_FAILURE(status)) { | |
726 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
727 | goto end; | |
1da177e4 | 728 | } |
1da177e4 | 729 | |
9e89dde2 ZR |
730 | package = (union acpi_object *)buffer.pointer; |
731 | status = acpi_bus_extract_wakeup_device_power_package(device, package); | |
732 | if (ACPI_FAILURE(status)) { | |
733 | ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package")); | |
734 | goto end; | |
735 | } | |
1da177e4 | 736 | |
9e89dde2 | 737 | kfree(buffer.pointer); |
1da177e4 | 738 | |
9e89dde2 | 739 | device->wakeup.flags.valid = 1; |
729b2bdb ZY |
740 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
741 | * system for the ACPI device with the _PRW object. | |
742 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. | |
743 | * So it is necessary to call _DSW object first. Only when it is not | |
744 | * present will the _PSW object used. | |
745 | */ | |
77e76609 RW |
746 | psw_error = acpi_device_sleep_wake(device, 0, 0, 0); |
747 | if (psw_error) | |
748 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
749 | "error in _DSW or _PSW evaluation\n")); | |
750 | ||
9e89dde2 | 751 | /* Power button, Lid switch always enable wakeup */ |
29b71a1c | 752 | if (!acpi_match_device_ids(device, button_device_ids)) |
9e89dde2 | 753 | device->wakeup.flags.run_wake = 1; |
1da177e4 | 754 | |
9e89dde2 ZR |
755 | end: |
756 | if (ACPI_FAILURE(status)) | |
757 | device->flags.wake_capable = 0; | |
d550d98d | 758 | return 0; |
1da177e4 | 759 | } |
1da177e4 | 760 | |
9e89dde2 | 761 | static int acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 762 | { |
9e89dde2 ZR |
763 | acpi_status status = 0; |
764 | acpi_handle handle = NULL; | |
765 | u32 i = 0; | |
1a365616 | 766 | |
4be44fcd | 767 | |
9e89dde2 ZR |
768 | /* |
769 | * Power Management Flags | |
770 | */ | |
771 | status = acpi_get_handle(device->handle, "_PSC", &handle); | |
772 | if (ACPI_SUCCESS(status)) | |
773 | device->power.flags.explicit_get = 1; | |
774 | status = acpi_get_handle(device->handle, "_IRC", &handle); | |
775 | if (ACPI_SUCCESS(status)) | |
776 | device->power.flags.inrush_current = 1; | |
1da177e4 | 777 | |
9e89dde2 ZR |
778 | /* |
779 | * Enumerate supported power management states | |
780 | */ | |
781 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3; i++) { | |
782 | struct acpi_device_power_state *ps = &device->power.states[i]; | |
783 | char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' }; | |
1da177e4 | 784 | |
9e89dde2 ZR |
785 | /* Evaluate "_PRx" to se if power resources are referenced */ |
786 | acpi_evaluate_reference(device->handle, object_name, NULL, | |
787 | &ps->resources); | |
788 | if (ps->resources.count) { | |
789 | device->power.flags.power_resources = 1; | |
790 | ps->flags.valid = 1; | |
1da177e4 | 791 | } |
1da177e4 | 792 | |
9e89dde2 ZR |
793 | /* Evaluate "_PSx" to see if we can do explicit sets */ |
794 | object_name[2] = 'S'; | |
795 | status = acpi_get_handle(device->handle, object_name, &handle); | |
796 | if (ACPI_SUCCESS(status)) { | |
797 | ps->flags.explicit_set = 1; | |
798 | ps->flags.valid = 1; | |
1da177e4 | 799 | } |
1da177e4 | 800 | |
9e89dde2 ZR |
801 | /* State is valid if we have some power control */ |
802 | if (ps->resources.count || ps->flags.explicit_set) | |
803 | ps->flags.valid = 1; | |
1da177e4 | 804 | |
9e89dde2 ZR |
805 | ps->power = -1; /* Unknown - driver assigned */ |
806 | ps->latency = -1; /* Unknown - driver assigned */ | |
807 | } | |
1da177e4 | 808 | |
9e89dde2 ZR |
809 | /* Set defaults for D0 and D3 states (always valid) */ |
810 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
811 | device->power.states[ACPI_STATE_D0].power = 100; | |
812 | device->power.states[ACPI_STATE_D3].flags.valid = 1; | |
813 | device->power.states[ACPI_STATE_D3].power = 0; | |
c8f7a62c | 814 | |
9e89dde2 | 815 | /* TBD: System wake support and resource requirements. */ |
c8f7a62c | 816 | |
9e89dde2 | 817 | device->power.state = ACPI_STATE_UNKNOWN; |
a51e145f | 818 | acpi_bus_get_power(device->handle, &(device->power.state)); |
c8f7a62c | 819 | |
9e89dde2 ZR |
820 | return 0; |
821 | } | |
c8f7a62c | 822 | |
4be44fcd | 823 | static int acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 824 | { |
4be44fcd LB |
825 | acpi_status status = AE_OK; |
826 | acpi_handle temp = NULL; | |
1da177e4 | 827 | |
1da177e4 LT |
828 | |
829 | /* Presence of _STA indicates 'dynamic_status' */ | |
830 | status = acpi_get_handle(device->handle, "_STA", &temp); | |
831 | if (ACPI_SUCCESS(status)) | |
832 | device->flags.dynamic_status = 1; | |
833 | ||
834 | /* Presence of _CID indicates 'compatible_ids' */ | |
835 | status = acpi_get_handle(device->handle, "_CID", &temp); | |
836 | if (ACPI_SUCCESS(status)) | |
837 | device->flags.compatible_ids = 1; | |
838 | ||
839 | /* Presence of _RMV indicates 'removable' */ | |
840 | status = acpi_get_handle(device->handle, "_RMV", &temp); | |
841 | if (ACPI_SUCCESS(status)) | |
842 | device->flags.removable = 1; | |
843 | ||
844 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
845 | status = acpi_get_handle(device->handle, "_EJD", &temp); | |
846 | if (ACPI_SUCCESS(status)) | |
847 | device->flags.ejectable = 1; | |
848 | else { | |
849 | status = acpi_get_handle(device->handle, "_EJ0", &temp); | |
850 | if (ACPI_SUCCESS(status)) | |
851 | device->flags.ejectable = 1; | |
852 | } | |
853 | ||
854 | /* Presence of _LCK indicates 'lockable' */ | |
855 | status = acpi_get_handle(device->handle, "_LCK", &temp); | |
856 | if (ACPI_SUCCESS(status)) | |
857 | device->flags.lockable = 1; | |
858 | ||
859 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ | |
860 | status = acpi_get_handle(device->handle, "_PS0", &temp); | |
861 | if (ACPI_FAILURE(status)) | |
862 | status = acpi_get_handle(device->handle, "_PR0", &temp); | |
863 | if (ACPI_SUCCESS(status)) | |
864 | device->flags.power_manageable = 1; | |
865 | ||
866 | /* Presence of _PRW indicates wake capable */ | |
867 | status = acpi_get_handle(device->handle, "_PRW", &temp); | |
868 | if (ACPI_SUCCESS(status)) | |
869 | device->flags.wake_capable = 1; | |
870 | ||
3c5f9be4 | 871 | /* TBD: Performance management */ |
1da177e4 | 872 | |
d550d98d | 873 | return 0; |
1da177e4 LT |
874 | } |
875 | ||
4be44fcd LB |
876 | static void acpi_device_get_busid(struct acpi_device *device, |
877 | acpi_handle handle, int type) | |
1da177e4 | 878 | { |
4be44fcd LB |
879 | char bus_id[5] = { '?', 0 }; |
880 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
881 | int i = 0; | |
1da177e4 LT |
882 | |
883 | /* | |
884 | * Bus ID | |
885 | * ------ | |
886 | * The device's Bus ID is simply the object name. | |
887 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
888 | */ | |
889 | switch (type) { | |
890 | case ACPI_BUS_TYPE_SYSTEM: | |
891 | strcpy(device->pnp.bus_id, "ACPI"); | |
892 | break; | |
893 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
894 | strcpy(device->pnp.bus_id, "PWRF"); | |
895 | break; | |
896 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
897 | strcpy(device->pnp.bus_id, "SLPF"); | |
898 | break; | |
899 | default: | |
900 | acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer); | |
901 | /* Clean up trailing underscores (if any) */ | |
902 | for (i = 3; i > 1; i--) { | |
903 | if (bus_id[i] == '_') | |
904 | bus_id[i] = '\0'; | |
905 | else | |
906 | break; | |
907 | } | |
908 | strcpy(device->pnp.bus_id, bus_id); | |
909 | break; | |
910 | } | |
911 | } | |
912 | ||
54735266 ZR |
913 | /* |
914 | * acpi_bay_match - see if a device is an ejectable driver bay | |
915 | * | |
916 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
917 | * then we can safely call it an ejectable drive bay | |
918 | */ | |
919 | static int acpi_bay_match(struct acpi_device *device){ | |
920 | acpi_status status; | |
921 | acpi_handle handle; | |
922 | acpi_handle tmp; | |
923 | acpi_handle phandle; | |
924 | ||
925 | handle = device->handle; | |
926 | ||
927 | status = acpi_get_handle(handle, "_EJ0", &tmp); | |
928 | if (ACPI_FAILURE(status)) | |
929 | return -ENODEV; | |
930 | ||
931 | if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || | |
932 | (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || | |
933 | (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || | |
934 | (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) | |
935 | return 0; | |
936 | ||
937 | if (acpi_get_parent(handle, &phandle)) | |
938 | return -ENODEV; | |
939 | ||
940 | if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) || | |
941 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) || | |
942 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) || | |
943 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp)))) | |
944 | return 0; | |
945 | ||
946 | return -ENODEV; | |
947 | } | |
948 | ||
3620f2f2 FS |
949 | /* |
950 | * acpi_dock_match - see if a device has a _DCK method | |
951 | */ | |
952 | static int acpi_dock_match(struct acpi_device *device) | |
953 | { | |
954 | acpi_handle tmp; | |
955 | return acpi_get_handle(device->handle, "_DCK", &tmp); | |
956 | } | |
957 | ||
4be44fcd LB |
958 | static void acpi_device_set_id(struct acpi_device *device, |
959 | struct acpi_device *parent, acpi_handle handle, | |
960 | int type) | |
1da177e4 | 961 | { |
4be44fcd LB |
962 | struct acpi_device_info *info; |
963 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
964 | char *hid = NULL; | |
965 | char *uid = NULL; | |
1da177e4 | 966 | struct acpi_compatible_id_list *cid_list = NULL; |
3620f2f2 | 967 | const char *cid_add = NULL; |
4be44fcd | 968 | acpi_status status; |
1da177e4 LT |
969 | |
970 | switch (type) { | |
971 | case ACPI_BUS_TYPE_DEVICE: | |
972 | status = acpi_get_object_info(handle, &buffer); | |
973 | if (ACPI_FAILURE(status)) { | |
96b2dd1f | 974 | printk(KERN_ERR PREFIX "%s: Error reading device info\n", __func__); |
1da177e4 LT |
975 | return; |
976 | } | |
977 | ||
978 | info = buffer.pointer; | |
979 | if (info->valid & ACPI_VALID_HID) | |
980 | hid = info->hardware_id.value; | |
981 | if (info->valid & ACPI_VALID_UID) | |
982 | uid = info->unique_id.value; | |
983 | if (info->valid & ACPI_VALID_CID) | |
984 | cid_list = &info->compatibility_id; | |
985 | if (info->valid & ACPI_VALID_ADR) { | |
986 | device->pnp.bus_address = info->address; | |
987 | device->flags.bus_address = 1; | |
988 | } | |
ae843332 | 989 | |
3620f2f2 FS |
990 | /* If we have a video/bay/dock device, add our selfdefined |
991 | HID to the CID list. Like that the video/bay/dock drivers | |
992 | will get autoloaded and the device might still match | |
993 | against another driver. | |
994 | */ | |
c3d6de69 | 995 | if (acpi_is_video_device(device)) |
3620f2f2 FS |
996 | cid_add = ACPI_VIDEO_HID; |
997 | else if (ACPI_SUCCESS(acpi_bay_match(device))) | |
998 | cid_add = ACPI_BAY_HID; | |
999 | else if (ACPI_SUCCESS(acpi_dock_match(device))) | |
1000 | cid_add = ACPI_DOCK_HID; | |
54735266 | 1001 | |
1da177e4 LT |
1002 | break; |
1003 | case ACPI_BUS_TYPE_POWER: | |
1004 | hid = ACPI_POWER_HID; | |
1005 | break; | |
1006 | case ACPI_BUS_TYPE_PROCESSOR: | |
ad93a765 | 1007 | hid = ACPI_PROCESSOR_OBJECT_HID; |
1da177e4 LT |
1008 | break; |
1009 | case ACPI_BUS_TYPE_SYSTEM: | |
1010 | hid = ACPI_SYSTEM_HID; | |
1011 | break; | |
1012 | case ACPI_BUS_TYPE_THERMAL: | |
1013 | hid = ACPI_THERMAL_HID; | |
1014 | break; | |
1015 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
1016 | hid = ACPI_BUTTON_HID_POWERF; | |
1017 | break; | |
1018 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
1019 | hid = ACPI_BUTTON_HID_SLEEPF; | |
1020 | break; | |
1021 | } | |
1022 | ||
1023 | /* | |
1024 | * \_SB | |
1025 | * ---- | |
1026 | * Fix for the system root bus device -- the only root-level device. | |
1027 | */ | |
c51a4de8 | 1028 | if (((acpi_handle)parent == ACPI_ROOT_OBJECT) && (type == ACPI_BUS_TYPE_DEVICE)) { |
1da177e4 LT |
1029 | hid = ACPI_BUS_HID; |
1030 | strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME); | |
1031 | strcpy(device->pnp.device_class, ACPI_BUS_CLASS); | |
1032 | } | |
1033 | ||
1034 | if (hid) { | |
1035 | strcpy(device->pnp.hardware_id, hid); | |
1036 | device->flags.hardware_id = 1; | |
1037 | } | |
1038 | if (uid) { | |
1039 | strcpy(device->pnp.unique_id, uid); | |
1040 | device->flags.unique_id = 1; | |
1041 | } | |
3620f2f2 FS |
1042 | if (cid_list || cid_add) { |
1043 | struct acpi_compatible_id_list *list; | |
1044 | int size = 0; | |
1045 | int count = 0; | |
1046 | ||
1047 | if (cid_list) { | |
1048 | size = cid_list->size; | |
1049 | } else if (cid_add) { | |
1050 | size = sizeof(struct acpi_compatible_id_list); | |
1051 | cid_list = ACPI_ALLOCATE_ZEROED((acpi_size) size); | |
1052 | if (!cid_list) { | |
1053 | printk(KERN_ERR "Memory allocation error\n"); | |
1054 | kfree(buffer.pointer); | |
1055 | return; | |
1056 | } else { | |
1057 | cid_list->count = 0; | |
1058 | cid_list->size = size; | |
1059 | } | |
1060 | } | |
1061 | if (cid_add) | |
1062 | size += sizeof(struct acpi_compatible_id); | |
1063 | list = kmalloc(size, GFP_KERNEL); | |
1064 | ||
1065 | if (list) { | |
1066 | if (cid_list) { | |
1067 | memcpy(list, cid_list, cid_list->size); | |
1068 | count = cid_list->count; | |
1069 | } | |
1070 | if (cid_add) { | |
1071 | strncpy(list->id[count].value, cid_add, | |
1072 | ACPI_MAX_CID_LENGTH); | |
1073 | count++; | |
1074 | device->flags.compatible_ids = 1; | |
1075 | } | |
1076 | list->size = size; | |
1077 | list->count = count; | |
1078 | device->pnp.cid_list = list; | |
1079 | } else | |
87ecd5cd | 1080 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
1da177e4 LT |
1081 | } |
1082 | ||
02438d87 | 1083 | kfree(buffer.pointer); |
1da177e4 LT |
1084 | } |
1085 | ||
4be44fcd | 1086 | static int acpi_device_set_context(struct acpi_device *device, int type) |
1da177e4 LT |
1087 | { |
1088 | acpi_status status = AE_OK; | |
1089 | int result = 0; | |
1090 | /* | |
1091 | * Context | |
1092 | * ------- | |
1093 | * Attach this 'struct acpi_device' to the ACPI object. This makes | |
1094 | * resolutions from handle->device very efficient. Note that we need | |
1095 | * to be careful with fixed-feature devices as they all attach to the | |
1096 | * root object. | |
1097 | */ | |
4be44fcd | 1098 | if (type != ACPI_BUS_TYPE_POWER_BUTTON && |
1da177e4 LT |
1099 | type != ACPI_BUS_TYPE_SLEEP_BUTTON) { |
1100 | status = acpi_attach_data(device->handle, | |
4be44fcd | 1101 | acpi_bus_data_handler, device); |
1da177e4 LT |
1102 | |
1103 | if (ACPI_FAILURE(status)) { | |
87ecd5cd | 1104 | printk(KERN_ERR PREFIX "Error attaching device data\n"); |
1da177e4 LT |
1105 | result = -ENODEV; |
1106 | } | |
1107 | } | |
1108 | return result; | |
1109 | } | |
1110 | ||
4be44fcd | 1111 | static int acpi_bus_remove(struct acpi_device *dev, int rmdevice) |
1da177e4 | 1112 | { |
1da177e4 | 1113 | if (!dev) |
d550d98d | 1114 | return -EINVAL; |
1da177e4 | 1115 | |
96333578 | 1116 | dev->removal_type = ACPI_BUS_REMOVAL_EJECT; |
1890a97a | 1117 | device_release_driver(&dev->dev); |
1da177e4 LT |
1118 | |
1119 | if (!rmdevice) | |
d550d98d | 1120 | return 0; |
1da177e4 | 1121 | |
2786f6e3 RZ |
1122 | /* |
1123 | * unbind _ADR-Based Devices when hot removal | |
1124 | */ | |
1da177e4 LT |
1125 | if (dev->flags.bus_address) { |
1126 | if ((dev->parent) && (dev->parent->ops.unbind)) | |
1127 | dev->parent->ops.unbind(dev); | |
1128 | } | |
1da177e4 LT |
1129 | acpi_device_unregister(dev, ACPI_BUS_REMOVAL_EJECT); |
1130 | ||
d550d98d | 1131 | return 0; |
1da177e4 LT |
1132 | } |
1133 | ||
3fb02738 | 1134 | static int |
4be44fcd | 1135 | acpi_add_single_object(struct acpi_device **child, |
c4168bff LS |
1136 | struct acpi_device *parent, acpi_handle handle, int type, |
1137 | struct acpi_bus_ops *ops) | |
1da177e4 | 1138 | { |
4be44fcd LB |
1139 | int result = 0; |
1140 | struct acpi_device *device = NULL; | |
1da177e4 | 1141 | |
1da177e4 LT |
1142 | |
1143 | if (!child) | |
d550d98d | 1144 | return -EINVAL; |
1da177e4 | 1145 | |
36bcbec7 | 1146 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 1147 | if (!device) { |
6468463a | 1148 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 1149 | return -ENOMEM; |
1da177e4 | 1150 | } |
1da177e4 LT |
1151 | |
1152 | device->handle = handle; | |
1153 | device->parent = parent; | |
c4168bff LS |
1154 | device->bus_ops = *ops; /* workround for not call .start */ |
1155 | ||
1da177e4 | 1156 | |
4be44fcd | 1157 | acpi_device_get_busid(device, handle, type); |
1da177e4 LT |
1158 | |
1159 | /* | |
1160 | * Flags | |
1161 | * ----- | |
1162 | * Get prior to calling acpi_bus_get_status() so we know whether | |
1163 | * or not _STA is present. Note that we only look for object | |
1164 | * handles -- cannot evaluate objects until we know the device is | |
1165 | * present and properly initialized. | |
1166 | */ | |
1167 | result = acpi_bus_get_flags(device); | |
1168 | if (result) | |
1169 | goto end; | |
1170 | ||
1171 | /* | |
1172 | * Status | |
1173 | * ------ | |
6940faba KT |
1174 | * See if the device is present. We always assume that non-Device |
1175 | * and non-Processor objects (e.g. thermal zones, power resources, | |
1176 | * etc.) are present, functioning, etc. (at least when parent object | |
1177 | * is present). Note that _STA has a different meaning for some | |
1178 | * objects (e.g. power resources) so we need to be careful how we use | |
1179 | * it. | |
1da177e4 LT |
1180 | */ |
1181 | switch (type) { | |
6940faba | 1182 | case ACPI_BUS_TYPE_PROCESSOR: |
1da177e4 LT |
1183 | case ACPI_BUS_TYPE_DEVICE: |
1184 | result = acpi_bus_get_status(device); | |
3620f2f2 FS |
1185 | if (ACPI_FAILURE(result)) { |
1186 | result = -ENODEV; | |
1da177e4 LT |
1187 | goto end; |
1188 | } | |
39a0ad87 ZY |
1189 | /* |
1190 | * When the device is neither present nor functional, the | |
1191 | * device should not be added to Linux ACPI device tree. | |
1192 | * When the status of the device is not present but functinal, | |
1193 | * it should be added to Linux ACPI tree. For example : bay | |
1194 | * device , dock device. | |
1195 | * In such conditions it is unncessary to check whether it is | |
1196 | * bay device or dock device. | |
1197 | */ | |
1198 | if (!device->status.present && !device->status.functional) { | |
1199 | result = -ENODEV; | |
1200 | goto end; | |
3620f2f2 | 1201 | } |
1da177e4 LT |
1202 | break; |
1203 | default: | |
0c0e8921 BH |
1204 | STRUCT_TO_INT(device->status) = |
1205 | ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | | |
1206 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; | |
1da177e4 LT |
1207 | break; |
1208 | } | |
1209 | ||
1210 | /* | |
1211 | * Initialize Device | |
1212 | * ----------------- | |
1213 | * TBD: Synch with Core's enumeration/initialization process. | |
1214 | */ | |
1215 | ||
1216 | /* | |
1217 | * Hardware ID, Unique ID, & Bus Address | |
1218 | * ------------------------------------- | |
1219 | */ | |
4be44fcd | 1220 | acpi_device_set_id(device, parent, handle, type); |
1da177e4 | 1221 | |
eab4b645 ZY |
1222 | /* |
1223 | * The ACPI device is attached to acpi handle before getting | |
1224 | * the power/wakeup/peformance flags. Otherwise OS can't get | |
1225 | * the corresponding ACPI device by the acpi handle in the course | |
1226 | * of getting the power/wakeup/performance flags. | |
1227 | */ | |
1228 | result = acpi_device_set_context(device, type); | |
1229 | if (result) | |
1230 | goto end; | |
1231 | ||
1da177e4 LT |
1232 | /* |
1233 | * Power Management | |
1234 | * ---------------- | |
1235 | */ | |
1236 | if (device->flags.power_manageable) { | |
1237 | result = acpi_bus_get_power_flags(device); | |
1238 | if (result) | |
1239 | goto end; | |
1240 | } | |
1241 | ||
4be44fcd | 1242 | /* |
1da177e4 LT |
1243 | * Wakeup device management |
1244 | *----------------------- | |
1245 | */ | |
1246 | if (device->flags.wake_capable) { | |
1247 | result = acpi_bus_get_wakeup_device_flags(device); | |
1248 | if (result) | |
1249 | goto end; | |
1250 | } | |
1251 | ||
1252 | /* | |
1253 | * Performance Management | |
1254 | * ---------------------- | |
1255 | */ | |
1256 | if (device->flags.performance_manageable) { | |
1257 | result = acpi_bus_get_perf_flags(device); | |
1258 | if (result) | |
1259 | goto end; | |
1260 | } | |
1261 | ||
1da177e4 | 1262 | |
e49bd2dd | 1263 | result = acpi_device_register(device, parent); |
1da177e4 LT |
1264 | |
1265 | /* | |
2786f6e3 | 1266 | * Bind _ADR-Based Devices when hot add |
1da177e4 LT |
1267 | */ |
1268 | if (device->flags.bus_address) { | |
1269 | if (device->parent && device->parent->ops.bind) | |
1270 | device->parent->ops.bind(device); | |
1271 | } | |
1272 | ||
4be44fcd | 1273 | end: |
1da177e4 LT |
1274 | if (!result) |
1275 | *child = device; | |
1276 | else { | |
6044ec88 | 1277 | kfree(device->pnp.cid_list); |
1da177e4 LT |
1278 | kfree(device); |
1279 | } | |
1280 | ||
d550d98d | 1281 | return result; |
1da177e4 | 1282 | } |
1da177e4 | 1283 | |
4be44fcd | 1284 | static int acpi_bus_scan(struct acpi_device *start, struct acpi_bus_ops *ops) |
1da177e4 | 1285 | { |
4be44fcd LB |
1286 | acpi_status status = AE_OK; |
1287 | struct acpi_device *parent = NULL; | |
1288 | struct acpi_device *child = NULL; | |
1289 | acpi_handle phandle = NULL; | |
1290 | acpi_handle chandle = NULL; | |
1291 | acpi_object_type type = 0; | |
1292 | u32 level = 1; | |
1da177e4 | 1293 | |
1da177e4 LT |
1294 | |
1295 | if (!start) | |
d550d98d | 1296 | return -EINVAL; |
1da177e4 LT |
1297 | |
1298 | parent = start; | |
1299 | phandle = start->handle; | |
4be44fcd | 1300 | |
1da177e4 LT |
1301 | /* |
1302 | * Parse through the ACPI namespace, identify all 'devices', and | |
1303 | * create a new 'struct acpi_device' for each. | |
1304 | */ | |
1305 | while ((level > 0) && parent) { | |
1306 | ||
1307 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, | |
4be44fcd | 1308 | chandle, &chandle); |
1da177e4 LT |
1309 | |
1310 | /* | |
1311 | * If this scope is exhausted then move our way back up. | |
1312 | */ | |
1313 | if (ACPI_FAILURE(status)) { | |
1314 | level--; | |
1315 | chandle = phandle; | |
1316 | acpi_get_parent(phandle, &phandle); | |
1317 | if (parent->parent) | |
1318 | parent = parent->parent; | |
1319 | continue; | |
1320 | } | |
1321 | ||
1322 | status = acpi_get_type(chandle, &type); | |
1323 | if (ACPI_FAILURE(status)) | |
1324 | continue; | |
1325 | ||
1326 | /* | |
1327 | * If this is a scope object then parse it (depth-first). | |
1328 | */ | |
1329 | if (type == ACPI_TYPE_LOCAL_SCOPE) { | |
1330 | level++; | |
1331 | phandle = chandle; | |
1332 | chandle = NULL; | |
1333 | continue; | |
1334 | } | |
1335 | ||
1336 | /* | |
1337 | * We're only interested in objects that we consider 'devices'. | |
1338 | */ | |
1339 | switch (type) { | |
1340 | case ACPI_TYPE_DEVICE: | |
1341 | type = ACPI_BUS_TYPE_DEVICE; | |
1342 | break; | |
1343 | case ACPI_TYPE_PROCESSOR: | |
1344 | type = ACPI_BUS_TYPE_PROCESSOR; | |
1345 | break; | |
1346 | case ACPI_TYPE_THERMAL: | |
1347 | type = ACPI_BUS_TYPE_THERMAL; | |
1348 | break; | |
1349 | case ACPI_TYPE_POWER: | |
1350 | type = ACPI_BUS_TYPE_POWER; | |
1351 | break; | |
1352 | default: | |
1353 | continue; | |
1354 | } | |
1355 | ||
3fb02738 RS |
1356 | if (ops->acpi_op_add) |
1357 | status = acpi_add_single_object(&child, parent, | |
c4168bff | 1358 | chandle, type, ops); |
4be44fcd | 1359 | else |
3fb02738 RS |
1360 | status = acpi_bus_get_device(chandle, &child); |
1361 | ||
4be44fcd LB |
1362 | if (ACPI_FAILURE(status)) |
1363 | continue; | |
3fb02738 | 1364 | |
c4168bff | 1365 | if (ops->acpi_op_start && !(ops->acpi_op_add)) { |
3fb02738 RS |
1366 | status = acpi_start_single_object(child); |
1367 | if (ACPI_FAILURE(status)) | |
1368 | continue; | |
1369 | } | |
1da177e4 LT |
1370 | |
1371 | /* | |
1372 | * If the device is present, enabled, and functioning then | |
1373 | * parse its scope (depth-first). Note that we need to | |
1374 | * represent absent devices to facilitate PnP notifications | |
1375 | * -- but only the subtree head (not all of its children, | |
1376 | * which will be enumerated when the parent is inserted). | |
1377 | * | |
1378 | * TBD: Need notifications and other detection mechanisms | |
4be44fcd | 1379 | * in place before we can fully implement this. |
1da177e4 | 1380 | */ |
39a0ad87 ZY |
1381 | /* |
1382 | * When the device is not present but functional, it is also | |
1383 | * necessary to scan the children of this device. | |
1384 | */ | |
1385 | if (child->status.present || (!child->status.present && | |
1386 | child->status.functional)) { | |
1da177e4 LT |
1387 | status = acpi_get_next_object(ACPI_TYPE_ANY, chandle, |
1388 | NULL, NULL); | |
1389 | if (ACPI_SUCCESS(status)) { | |
1390 | level++; | |
1391 | phandle = chandle; | |
1392 | chandle = NULL; | |
1393 | parent = child; | |
1394 | } | |
1395 | } | |
1396 | } | |
1397 | ||
d550d98d | 1398 | return 0; |
1da177e4 | 1399 | } |
1da177e4 | 1400 | |
3fb02738 | 1401 | int |
4be44fcd LB |
1402 | acpi_bus_add(struct acpi_device **child, |
1403 | struct acpi_device *parent, acpi_handle handle, int type) | |
3fb02738 RS |
1404 | { |
1405 | int result; | |
1406 | struct acpi_bus_ops ops; | |
1407 | ||
c4168bff LS |
1408 | memset(&ops, 0, sizeof(ops)); |
1409 | ops.acpi_op_add = 1; | |
3fb02738 | 1410 | |
c4168bff LS |
1411 | result = acpi_add_single_object(child, parent, handle, type, &ops); |
1412 | if (!result) | |
3fb02738 | 1413 | result = acpi_bus_scan(*child, &ops); |
c4168bff | 1414 | |
d550d98d | 1415 | return result; |
3fb02738 | 1416 | } |
4be44fcd | 1417 | |
3fb02738 RS |
1418 | EXPORT_SYMBOL(acpi_bus_add); |
1419 | ||
4be44fcd | 1420 | int acpi_bus_start(struct acpi_device *device) |
3fb02738 RS |
1421 | { |
1422 | int result; | |
1423 | struct acpi_bus_ops ops; | |
1424 | ||
3fb02738 RS |
1425 | |
1426 | if (!device) | |
d550d98d | 1427 | return -EINVAL; |
3fb02738 RS |
1428 | |
1429 | result = acpi_start_single_object(device); | |
1430 | if (!result) { | |
1431 | memset(&ops, 0, sizeof(ops)); | |
1432 | ops.acpi_op_start = 1; | |
1433 | result = acpi_bus_scan(device, &ops); | |
1434 | } | |
d550d98d | 1435 | return result; |
3fb02738 | 1436 | } |
4be44fcd | 1437 | |
3fb02738 | 1438 | EXPORT_SYMBOL(acpi_bus_start); |
1da177e4 | 1439 | |
ceaba663 | 1440 | int acpi_bus_trim(struct acpi_device *start, int rmdevice) |
1da177e4 | 1441 | { |
4be44fcd LB |
1442 | acpi_status status; |
1443 | struct acpi_device *parent, *child; | |
1444 | acpi_handle phandle, chandle; | |
1445 | acpi_object_type type; | |
1446 | u32 level = 1; | |
1447 | int err = 0; | |
1448 | ||
1449 | parent = start; | |
1da177e4 LT |
1450 | phandle = start->handle; |
1451 | child = chandle = NULL; | |
1452 | ||
1453 | while ((level > 0) && parent && (!err)) { | |
1454 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, | |
4be44fcd | 1455 | chandle, &chandle); |
1da177e4 LT |
1456 | |
1457 | /* | |
1458 | * If this scope is exhausted then move our way back up. | |
1459 | */ | |
1460 | if (ACPI_FAILURE(status)) { | |
1461 | level--; | |
1462 | chandle = phandle; | |
1463 | acpi_get_parent(phandle, &phandle); | |
1464 | child = parent; | |
1465 | parent = parent->parent; | |
1466 | ||
1467 | if (level == 0) | |
1468 | err = acpi_bus_remove(child, rmdevice); | |
1469 | else | |
1470 | err = acpi_bus_remove(child, 1); | |
1471 | ||
1472 | continue; | |
1473 | } | |
1474 | ||
1475 | status = acpi_get_type(chandle, &type); | |
1476 | if (ACPI_FAILURE(status)) { | |
1477 | continue; | |
1478 | } | |
1479 | /* | |
1480 | * If there is a device corresponding to chandle then | |
1481 | * parse it (depth-first). | |
1482 | */ | |
1483 | if (acpi_bus_get_device(chandle, &child) == 0) { | |
1484 | level++; | |
1485 | phandle = chandle; | |
1486 | chandle = NULL; | |
1487 | parent = child; | |
1488 | } | |
1489 | continue; | |
1490 | } | |
1491 | return err; | |
1492 | } | |
ceaba663 KA |
1493 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
1494 | ||
1da177e4 | 1495 | |
4be44fcd | 1496 | static int acpi_bus_scan_fixed(struct acpi_device *root) |
1da177e4 | 1497 | { |
4be44fcd LB |
1498 | int result = 0; |
1499 | struct acpi_device *device = NULL; | |
c4168bff | 1500 | struct acpi_bus_ops ops; |
1da177e4 LT |
1501 | |
1502 | if (!root) | |
d550d98d | 1503 | return -ENODEV; |
1da177e4 | 1504 | |
c4168bff LS |
1505 | memset(&ops, 0, sizeof(ops)); |
1506 | ops.acpi_op_add = 1; | |
1507 | ops.acpi_op_start = 1; | |
1508 | ||
1da177e4 LT |
1509 | /* |
1510 | * Enumerate all fixed-feature devices. | |
1511 | */ | |
cee324b1 | 1512 | if ((acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON) == 0) { |
3fb02738 | 1513 | result = acpi_add_single_object(&device, acpi_root, |
4be44fcd | 1514 | NULL, |
c4168bff LS |
1515 | ACPI_BUS_TYPE_POWER_BUTTON, |
1516 | &ops); | |
3fb02738 | 1517 | } |
1da177e4 | 1518 | |
cee324b1 | 1519 | if ((acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON) == 0) { |
3fb02738 | 1520 | result = acpi_add_single_object(&device, acpi_root, |
4be44fcd | 1521 | NULL, |
c4168bff LS |
1522 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
1523 | &ops); | |
3fb02738 | 1524 | } |
1da177e4 | 1525 | |
d550d98d | 1526 | return result; |
1da177e4 LT |
1527 | } |
1528 | ||
c04209a7 | 1529 | |
1da177e4 LT |
1530 | static int __init acpi_scan_init(void) |
1531 | { | |
1532 | int result; | |
3fb02738 | 1533 | struct acpi_bus_ops ops; |
1da177e4 | 1534 | |
1da177e4 LT |
1535 | |
1536 | if (acpi_disabled) | |
d550d98d | 1537 | return 0; |
1da177e4 | 1538 | |
c4168bff LS |
1539 | memset(&ops, 0, sizeof(ops)); |
1540 | ops.acpi_op_add = 1; | |
1541 | ops.acpi_op_start = 1; | |
1da177e4 | 1542 | |
5b327265 PM |
1543 | result = bus_register(&acpi_bus_type); |
1544 | if (result) { | |
1545 | /* We don't want to quit even if we failed to add suspend/resume */ | |
1546 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
1547 | } | |
1548 | ||
1da177e4 LT |
1549 | /* |
1550 | * Create the root device in the bus's device tree | |
1551 | */ | |
3fb02738 | 1552 | result = acpi_add_single_object(&acpi_root, NULL, ACPI_ROOT_OBJECT, |
c4168bff | 1553 | ACPI_BUS_TYPE_SYSTEM, &ops); |
1da177e4 LT |
1554 | if (result) |
1555 | goto Done; | |
1556 | ||
1557 | /* | |
1558 | * Enumerate devices in the ACPI namespace. | |
1559 | */ | |
1560 | result = acpi_bus_scan_fixed(acpi_root); | |
c04209a7 | 1561 | |
c4168bff | 1562 | if (!result) |
3fb02738 | 1563 | result = acpi_bus_scan(acpi_root, &ops); |
1da177e4 LT |
1564 | |
1565 | if (result) | |
1566 | acpi_device_unregister(acpi_root, ACPI_BUS_REMOVAL_NORMAL); | |
1567 | ||
4be44fcd | 1568 | Done: |
d550d98d | 1569 | return result; |
1da177e4 LT |
1570 | } |
1571 | ||
1572 | subsys_initcall(acpi_scan_init); |