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Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * scan.c - support for transforming the ACPI namespace into individual objects | |
3 | */ | |
4 | ||
5 | #include <linux/module.h> | |
6 | #include <linux/init.h> | |
9b6d97b6 | 7 | #include <linux/kernel.h> |
1da177e4 | 8 | #include <linux/acpi.h> |
74523c90 AK |
9 | #include <linux/signal.h> |
10 | #include <linux/kthread.h> | |
1da177e4 LT |
11 | |
12 | #include <acpi/acpi_drivers.h> | |
13 | #include <acpi/acinterp.h> /* for acpi_ex_eisa_id_to_string() */ | |
14 | ||
1da177e4 | 15 | #define _COMPONENT ACPI_BUS_COMPONENT |
f52fd66d | 16 | ACPI_MODULE_NAME("scan"); |
1da177e4 | 17 | #define STRUCT_TO_INT(s) (*((int*)&s)) |
4be44fcd | 18 | extern struct acpi_device *acpi_root; |
1da177e4 LT |
19 | |
20 | #define ACPI_BUS_CLASS "system_bus" | |
29b71a1c | 21 | #define ACPI_BUS_HID "LNXSYBUS" |
1da177e4 LT |
22 | #define ACPI_BUS_DEVICE_NAME "System Bus" |
23 | ||
24 | static LIST_HEAD(acpi_device_list); | |
e49bd2dd | 25 | static LIST_HEAD(acpi_bus_id_list); |
1da177e4 LT |
26 | DEFINE_SPINLOCK(acpi_device_lock); |
27 | LIST_HEAD(acpi_wakeup_device_list); | |
28 | ||
e49bd2dd | 29 | struct acpi_device_bus_id{ |
bb095854 | 30 | char bus_id[15]; |
e49bd2dd ZR |
31 | unsigned int instance_no; |
32 | struct list_head node; | |
1da177e4 | 33 | }; |
29b71a1c TR |
34 | |
35 | /* | |
36 | * Creates hid/cid(s) string needed for modalias and uevent | |
37 | * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: | |
38 | * char *modalias: "acpi:IBM0001:ACPI0001" | |
39 | */ | |
b3e572d2 AB |
40 | static int create_modalias(struct acpi_device *acpi_dev, char *modalias, |
41 | int size) | |
42 | { | |
29b71a1c | 43 | int len; |
5c9fcb5d | 44 | int count; |
29b71a1c | 45 | |
5c9fcb5d | 46 | if (!acpi_dev->flags.hardware_id && !acpi_dev->flags.compatible_ids) |
29b71a1c TR |
47 | return -ENODEV; |
48 | ||
5c9fcb5d | 49 | len = snprintf(modalias, size, "acpi:"); |
29b71a1c TR |
50 | size -= len; |
51 | ||
5c9fcb5d ZR |
52 | if (acpi_dev->flags.hardware_id) { |
53 | count = snprintf(&modalias[len], size, "%s:", | |
54 | acpi_dev->pnp.hardware_id); | |
55 | if (count < 0 || count >= size) | |
56 | return -EINVAL; | |
57 | len += count; | |
58 | size -= count; | |
59 | } | |
60 | ||
29b71a1c TR |
61 | if (acpi_dev->flags.compatible_ids) { |
62 | struct acpi_compatible_id_list *cid_list; | |
63 | int i; | |
29b71a1c TR |
64 | |
65 | cid_list = acpi_dev->pnp.cid_list; | |
66 | for (i = 0; i < cid_list->count; i++) { | |
67 | count = snprintf(&modalias[len], size, "%s:", | |
68 | cid_list->id[i].value); | |
69 | if (count < 0 || count >= size) { | |
87ecd5cd | 70 | printk(KERN_ERR PREFIX "%s cid[%i] exceeds event buffer size", |
29b71a1c TR |
71 | acpi_dev->pnp.device_name, i); |
72 | break; | |
73 | } | |
74 | len += count; | |
75 | size -= count; | |
76 | } | |
77 | } | |
78 | ||
79 | modalias[len] = '\0'; | |
80 | return len; | |
81 | } | |
82 | ||
83 | static ssize_t | |
84 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
85 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
86 | int len; | |
87 | ||
88 | /* Device has no HID and no CID or string is >1024 */ | |
89 | len = create_modalias(acpi_dev, buf, 1024); | |
90 | if (len <= 0) | |
91 | return 0; | |
92 | buf[len++] = '\n'; | |
93 | return len; | |
94 | } | |
95 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); | |
96 | ||
26d46867 | 97 | static int acpi_bus_hot_remove_device(void *context) |
1da177e4 | 98 | { |
26d46867 ZR |
99 | struct acpi_device *device; |
100 | acpi_handle handle = context; | |
1da177e4 LT |
101 | struct acpi_object_list arg_list; |
102 | union acpi_object arg; | |
103 | acpi_status status = AE_OK; | |
1da177e4 | 104 | |
26d46867 ZR |
105 | if (acpi_bus_get_device(handle, &device)) |
106 | return 0; | |
107 | ||
108 | if (!device) | |
109 | return 0; | |
110 | ||
111 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
0794469d | 112 | "Hot-removing device %s...\n", dev_name(&device->dev))); |
26d46867 ZR |
113 | |
114 | if (acpi_bus_trim(device, 1)) { | |
55ac9a01 LM |
115 | printk(KERN_ERR PREFIX |
116 | "Removing device failed\n"); | |
26d46867 ZR |
117 | return -1; |
118 | } | |
1da177e4 | 119 | |
26d46867 ZR |
120 | /* power off device */ |
121 | status = acpi_evaluate_object(handle, "_PS3", NULL, NULL); | |
122 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) | |
55ac9a01 LM |
123 | printk(KERN_WARNING PREFIX |
124 | "Power-off device failed\n"); | |
26d46867 ZR |
125 | |
126 | if (device->flags.lockable) { | |
1da177e4 LT |
127 | arg_list.count = 1; |
128 | arg_list.pointer = &arg; | |
129 | arg.type = ACPI_TYPE_INTEGER; | |
130 | arg.integer.value = 0; | |
131 | acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); | |
132 | } | |
1da177e4 | 133 | |
1da177e4 LT |
134 | arg_list.count = 1; |
135 | arg_list.pointer = &arg; | |
136 | arg.type = ACPI_TYPE_INTEGER; | |
137 | arg.integer.value = 1; | |
1da177e4 | 138 | |
1da177e4 LT |
139 | /* |
140 | * TBD: _EJD support. | |
141 | */ | |
1da177e4 | 142 | status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); |
26d46867 ZR |
143 | if (ACPI_FAILURE(status)) |
144 | return -ENODEV; | |
1da177e4 | 145 | |
26d46867 | 146 | return 0; |
1da177e4 LT |
147 | } |
148 | ||
1da177e4 | 149 | static ssize_t |
f883d9db PM |
150 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
151 | const char *buf, size_t count) | |
1da177e4 | 152 | { |
4be44fcd | 153 | int ret = count; |
4be44fcd | 154 | acpi_status status; |
4be44fcd | 155 | acpi_object_type type = 0; |
f883d9db | 156 | struct acpi_device *acpi_device = to_acpi_device(d); |
74523c90 | 157 | struct task_struct *task; |
1da177e4 | 158 | |
1da177e4 LT |
159 | if ((!count) || (buf[0] != '1')) { |
160 | return -EINVAL; | |
161 | } | |
1da177e4 | 162 | #ifndef FORCE_EJECT |
f883d9db | 163 | if (acpi_device->driver == NULL) { |
1da177e4 LT |
164 | ret = -ENODEV; |
165 | goto err; | |
166 | } | |
167 | #endif | |
f883d9db PM |
168 | status = acpi_get_type(acpi_device->handle, &type); |
169 | if (ACPI_FAILURE(status) || (!acpi_device->flags.ejectable)) { | |
1da177e4 LT |
170 | ret = -ENODEV; |
171 | goto err; | |
172 | } | |
1da177e4 | 173 | |
26d46867 | 174 | /* remove the device in another thread to fix the deadlock issue */ |
74523c90 AK |
175 | task = kthread_run(acpi_bus_hot_remove_device, |
176 | acpi_device->handle, "acpi_hot_remove_device"); | |
177 | if (IS_ERR(task)) | |
178 | ret = PTR_ERR(task); | |
179 | err: | |
1da177e4 | 180 | return ret; |
1da177e4 LT |
181 | } |
182 | ||
f883d9db | 183 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
1da177e4 | 184 | |
e49bd2dd ZR |
185 | static ssize_t |
186 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
187 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1da177e4 | 188 | |
e49bd2dd | 189 | return sprintf(buf, "%s\n", acpi_dev->pnp.hardware_id); |
1da177e4 | 190 | } |
e49bd2dd | 191 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
1da177e4 | 192 | |
e49bd2dd ZR |
193 | static ssize_t |
194 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
195 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
196 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
197 | int result; | |
1da177e4 | 198 | |
e49bd2dd ZR |
199 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
200 | if(result) | |
201 | goto end; | |
1da177e4 | 202 | |
e49bd2dd ZR |
203 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
204 | kfree(path.pointer); | |
205 | end: | |
206 | return result; | |
1da177e4 | 207 | } |
e49bd2dd | 208 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
1da177e4 | 209 | |
e49bd2dd | 210 | static int acpi_device_setup_files(struct acpi_device *dev) |
1da177e4 | 211 | { |
f883d9db PM |
212 | acpi_status status; |
213 | acpi_handle temp; | |
e49bd2dd | 214 | int result = 0; |
1da177e4 LT |
215 | |
216 | /* | |
e49bd2dd | 217 | * Devices gotten from FADT don't have a "path" attribute |
1da177e4 | 218 | */ |
e49bd2dd ZR |
219 | if(dev->handle) { |
220 | result = device_create_file(&dev->dev, &dev_attr_path); | |
221 | if(result) | |
222 | goto end; | |
1da177e4 LT |
223 | } |
224 | ||
e49bd2dd ZR |
225 | if(dev->flags.hardware_id) { |
226 | result = device_create_file(&dev->dev, &dev_attr_hid); | |
227 | if(result) | |
228 | goto end; | |
229 | } | |
1da177e4 | 230 | |
29b71a1c TR |
231 | if (dev->flags.hardware_id || dev->flags.compatible_ids){ |
232 | result = device_create_file(&dev->dev, &dev_attr_modalias); | |
233 | if(result) | |
234 | goto end; | |
235 | } | |
236 | ||
e49bd2dd ZR |
237 | /* |
238 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
239 | * hot-removal function from userland. | |
240 | */ | |
f883d9db PM |
241 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); |
242 | if (ACPI_SUCCESS(status)) | |
e49bd2dd ZR |
243 | result = device_create_file(&dev->dev, &dev_attr_eject); |
244 | end: | |
245 | return result; | |
1da177e4 LT |
246 | } |
247 | ||
f883d9db | 248 | static void acpi_device_remove_files(struct acpi_device *dev) |
1da177e4 | 249 | { |
f883d9db PM |
250 | acpi_status status; |
251 | acpi_handle temp; | |
1da177e4 | 252 | |
f883d9db PM |
253 | /* |
254 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
255 | * hot-removal function from userland. | |
256 | */ | |
257 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); | |
258 | if (ACPI_SUCCESS(status)) | |
259 | device_remove_file(&dev->dev, &dev_attr_eject); | |
1da177e4 | 260 | |
29b71a1c TR |
261 | if (dev->flags.hardware_id || dev->flags.compatible_ids) |
262 | device_remove_file(&dev->dev, &dev_attr_modalias); | |
263 | ||
e49bd2dd ZR |
264 | if(dev->flags.hardware_id) |
265 | device_remove_file(&dev->dev, &dev_attr_hid); | |
266 | if(dev->handle) | |
267 | device_remove_file(&dev->dev, &dev_attr_path); | |
1da177e4 | 268 | } |
1da177e4 | 269 | /* -------------------------------------------------------------------------- |
9e89dde2 | 270 | ACPI Bus operations |
1da177e4 | 271 | -------------------------------------------------------------------------- */ |
29b71a1c TR |
272 | |
273 | int acpi_match_device_ids(struct acpi_device *device, | |
274 | const struct acpi_device_id *ids) | |
275 | { | |
276 | const struct acpi_device_id *id; | |
277 | ||
39a0ad87 ZY |
278 | /* |
279 | * If the device is not present, it is unnecessary to load device | |
280 | * driver for it. | |
281 | */ | |
282 | if (!device->status.present) | |
283 | return -ENODEV; | |
284 | ||
29b71a1c TR |
285 | if (device->flags.hardware_id) { |
286 | for (id = ids; id->id[0]; id++) { | |
287 | if (!strcmp((char*)id->id, device->pnp.hardware_id)) | |
288 | return 0; | |
289 | } | |
290 | } | |
291 | ||
292 | if (device->flags.compatible_ids) { | |
293 | struct acpi_compatible_id_list *cid_list = device->pnp.cid_list; | |
294 | int i; | |
295 | ||
296 | for (id = ids; id->id[0]; id++) { | |
297 | /* compare multiple _CID entries against driver ids */ | |
298 | for (i = 0; i < cid_list->count; i++) { | |
299 | if (!strcmp((char*)id->id, | |
300 | cid_list->id[i].value)) | |
301 | return 0; | |
302 | } | |
303 | } | |
304 | } | |
305 | ||
306 | return -ENOENT; | |
307 | } | |
308 | EXPORT_SYMBOL(acpi_match_device_ids); | |
309 | ||
1890a97a | 310 | static void acpi_device_release(struct device *dev) |
1da177e4 | 311 | { |
1890a97a | 312 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 313 | |
1890a97a PM |
314 | kfree(acpi_dev->pnp.cid_list); |
315 | kfree(acpi_dev); | |
1da177e4 LT |
316 | } |
317 | ||
5d9464a4 | 318 | static int acpi_device_suspend(struct device *dev, pm_message_t state) |
1da177e4 | 319 | { |
5d9464a4 PM |
320 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
321 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
1da177e4 | 322 | |
5d9464a4 PM |
323 | if (acpi_drv && acpi_drv->ops.suspend) |
324 | return acpi_drv->ops.suspend(acpi_dev, state); | |
1da177e4 LT |
325 | return 0; |
326 | } | |
1da177e4 | 327 | |
5d9464a4 | 328 | static int acpi_device_resume(struct device *dev) |
9e89dde2 | 329 | { |
5d9464a4 PM |
330 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
331 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
1da177e4 | 332 | |
5d9464a4 PM |
333 | if (acpi_drv && acpi_drv->ops.resume) |
334 | return acpi_drv->ops.resume(acpi_dev); | |
d550d98d | 335 | return 0; |
1da177e4 LT |
336 | } |
337 | ||
5d9464a4 | 338 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 339 | { |
5d9464a4 PM |
340 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
341 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
1da177e4 | 342 | |
29b71a1c | 343 | return !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
5d9464a4 | 344 | } |
1da177e4 | 345 | |
7eff2e7a | 346 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 | 347 | { |
5d9464a4 | 348 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
7eff2e7a | 349 | int len; |
5d9464a4 | 350 | |
7eff2e7a KS |
351 | if (add_uevent_var(env, "MODALIAS=")) |
352 | return -ENOMEM; | |
353 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], | |
354 | sizeof(env->buf) - env->buflen); | |
355 | if (len >= (sizeof(env->buf) - env->buflen)) | |
356 | return -ENOMEM; | |
357 | env->buflen += len; | |
9e89dde2 | 358 | return 0; |
1da177e4 LT |
359 | } |
360 | ||
5d9464a4 PM |
361 | static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *); |
362 | static int acpi_start_single_object(struct acpi_device *); | |
363 | static int acpi_device_probe(struct device * dev) | |
1da177e4 | 364 | { |
5d9464a4 PM |
365 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
366 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
367 | int ret; | |
368 | ||
369 | ret = acpi_bus_driver_init(acpi_dev, acpi_drv); | |
370 | if (!ret) { | |
c4168bff LS |
371 | if (acpi_dev->bus_ops.acpi_op_start) |
372 | acpi_start_single_object(acpi_dev); | |
5d9464a4 PM |
373 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
374 | "Found driver [%s] for device [%s]\n", | |
375 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
376 | get_device(dev); | |
377 | } | |
378 | return ret; | |
379 | } | |
1da177e4 | 380 | |
5d9464a4 PM |
381 | static int acpi_device_remove(struct device * dev) |
382 | { | |
383 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
384 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
385 | ||
386 | if (acpi_drv) { | |
387 | if (acpi_drv->ops.stop) | |
96333578 | 388 | acpi_drv->ops.stop(acpi_dev, acpi_dev->removal_type); |
5d9464a4 | 389 | if (acpi_drv->ops.remove) |
96333578 | 390 | acpi_drv->ops.remove(acpi_dev, acpi_dev->removal_type); |
1da177e4 | 391 | } |
5d9464a4 | 392 | acpi_dev->driver = NULL; |
db89b4f0 | 393 | acpi_dev->driver_data = NULL; |
1da177e4 | 394 | |
5d9464a4 | 395 | put_device(dev); |
9e89dde2 ZR |
396 | return 0; |
397 | } | |
1da177e4 | 398 | |
5d9464a4 | 399 | static void acpi_device_shutdown(struct device *dev) |
1da177e4 | 400 | { |
5d9464a4 PM |
401 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
402 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
1da177e4 | 403 | |
5d9464a4 PM |
404 | if (acpi_drv && acpi_drv->ops.shutdown) |
405 | acpi_drv->ops.shutdown(acpi_dev); | |
1da177e4 | 406 | |
5d9464a4 | 407 | return ; |
1da177e4 LT |
408 | } |
409 | ||
55955aad | 410 | struct bus_type acpi_bus_type = { |
9e89dde2 ZR |
411 | .name = "acpi", |
412 | .suspend = acpi_device_suspend, | |
413 | .resume = acpi_device_resume, | |
5d9464a4 PM |
414 | .shutdown = acpi_device_shutdown, |
415 | .match = acpi_bus_match, | |
416 | .probe = acpi_device_probe, | |
417 | .remove = acpi_device_remove, | |
418 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
419 | }; |
420 | ||
e49bd2dd | 421 | static int acpi_device_register(struct acpi_device *device, |
9e89dde2 | 422 | struct acpi_device *parent) |
1da177e4 | 423 | { |
4be44fcd | 424 | int result; |
e49bd2dd ZR |
425 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
426 | int found = 0; | |
9e89dde2 ZR |
427 | /* |
428 | * Linkage | |
429 | * ------- | |
430 | * Link this device to its parent and siblings. | |
431 | */ | |
432 | INIT_LIST_HEAD(&device->children); | |
433 | INIT_LIST_HEAD(&device->node); | |
434 | INIT_LIST_HEAD(&device->g_list); | |
435 | INIT_LIST_HEAD(&device->wakeup_list); | |
1da177e4 | 436 | |
e49bd2dd ZR |
437 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
438 | if (!new_bus_id) { | |
439 | printk(KERN_ERR PREFIX "Memory allocation error\n"); | |
440 | return -ENOMEM; | |
1da177e4 | 441 | } |
e49bd2dd | 442 | |
9e89dde2 | 443 | spin_lock(&acpi_device_lock); |
e49bd2dd ZR |
444 | /* |
445 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
446 | * If failed, create one and link it into acpi_bus_id_list | |
447 | */ | |
448 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
bb095854 | 449 | if(!strcmp(acpi_device_bus_id->bus_id, device->flags.hardware_id? device->pnp.hardware_id : "device")) { |
e49bd2dd ZR |
450 | acpi_device_bus_id->instance_no ++; |
451 | found = 1; | |
452 | kfree(new_bus_id); | |
453 | break; | |
454 | } | |
1da177e4 | 455 | } |
e49bd2dd ZR |
456 | if(!found) { |
457 | acpi_device_bus_id = new_bus_id; | |
bb095854 | 458 | strcpy(acpi_device_bus_id->bus_id, device->flags.hardware_id ? device->pnp.hardware_id : "device"); |
e49bd2dd ZR |
459 | acpi_device_bus_id->instance_no = 0; |
460 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 461 | } |
0794469d | 462 | dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 463 | |
9e89dde2 ZR |
464 | if (device->parent) { |
465 | list_add_tail(&device->node, &device->parent->children); | |
466 | list_add_tail(&device->g_list, &device->parent->g_list); | |
467 | } else | |
468 | list_add_tail(&device->g_list, &acpi_device_list); | |
469 | if (device->wakeup.flags.valid) | |
470 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
471 | spin_unlock(&acpi_device_lock); | |
1da177e4 | 472 | |
1890a97a PM |
473 | if (device->parent) |
474 | device->dev.parent = &parent->dev; | |
475 | device->dev.bus = &acpi_bus_type; | |
476 | device_initialize(&device->dev); | |
1890a97a | 477 | device->dev.release = &acpi_device_release; |
e49bd2dd ZR |
478 | result = device_add(&device->dev); |
479 | if(result) { | |
fc3a8828 | 480 | dev_err(&device->dev, "Error adding device\n"); |
e49bd2dd | 481 | goto end; |
1da177e4 | 482 | } |
1da177e4 | 483 | |
e49bd2dd ZR |
484 | result = acpi_device_setup_files(device); |
485 | if(result) | |
0794469d KS |
486 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
487 | dev_name(&device->dev)); | |
1da177e4 | 488 | |
96333578 | 489 | device->removal_type = ACPI_BUS_REMOVAL_NORMAL; |
1da177e4 | 490 | return 0; |
e49bd2dd ZR |
491 | end: |
492 | spin_lock(&acpi_device_lock); | |
493 | if (device->parent) { | |
494 | list_del(&device->node); | |
495 | list_del(&device->g_list); | |
496 | } else | |
497 | list_del(&device->g_list); | |
498 | list_del(&device->wakeup_list); | |
499 | spin_unlock(&acpi_device_lock); | |
500 | return result; | |
1da177e4 LT |
501 | } |
502 | ||
9e89dde2 ZR |
503 | static void acpi_device_unregister(struct acpi_device *device, int type) |
504 | { | |
505 | spin_lock(&acpi_device_lock); | |
506 | if (device->parent) { | |
507 | list_del(&device->node); | |
508 | list_del(&device->g_list); | |
509 | } else | |
510 | list_del(&device->g_list); | |
1da177e4 | 511 | |
9e89dde2 | 512 | list_del(&device->wakeup_list); |
9e89dde2 | 513 | spin_unlock(&acpi_device_lock); |
1da177e4 | 514 | |
9e89dde2 | 515 | acpi_detach_data(device->handle, acpi_bus_data_handler); |
1890a97a | 516 | |
f883d9db | 517 | acpi_device_remove_files(device); |
1890a97a | 518 | device_unregister(&device->dev); |
1da177e4 LT |
519 | } |
520 | ||
9e89dde2 ZR |
521 | /* -------------------------------------------------------------------------- |
522 | Driver Management | |
523 | -------------------------------------------------------------------------- */ | |
1da177e4 | 524 | /** |
d758a8fa RD |
525 | * acpi_bus_driver_init - add a device to a driver |
526 | * @device: the device to add and initialize | |
527 | * @driver: driver for the device | |
528 | * | |
1da177e4 | 529 | * Used to initialize a device via its device driver. Called whenever a |
1890a97a | 530 | * driver is bound to a device. Invokes the driver's add() ops. |
1da177e4 LT |
531 | */ |
532 | static int | |
4be44fcd | 533 | acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) |
1da177e4 | 534 | { |
4be44fcd | 535 | int result = 0; |
1da177e4 | 536 | |
1da177e4 LT |
537 | |
538 | if (!device || !driver) | |
d550d98d | 539 | return -EINVAL; |
1da177e4 LT |
540 | |
541 | if (!driver->ops.add) | |
d550d98d | 542 | return -ENOSYS; |
1da177e4 LT |
543 | |
544 | result = driver->ops.add(device); | |
545 | if (result) { | |
546 | device->driver = NULL; | |
db89b4f0 | 547 | device->driver_data = NULL; |
d550d98d | 548 | return result; |
1da177e4 LT |
549 | } |
550 | ||
551 | device->driver = driver; | |
552 | ||
553 | /* | |
554 | * TBD - Configuration Management: Assign resources to device based | |
555 | * upon possible configuration and currently allocated resources. | |
556 | */ | |
557 | ||
4be44fcd LB |
558 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
559 | "Driver successfully bound to device\n")); | |
d550d98d | 560 | return 0; |
3fb02738 RS |
561 | } |
562 | ||
8713cbef | 563 | static int acpi_start_single_object(struct acpi_device *device) |
3fb02738 RS |
564 | { |
565 | int result = 0; | |
566 | struct acpi_driver *driver; | |
567 | ||
3fb02738 RS |
568 | |
569 | if (!(driver = device->driver)) | |
d550d98d | 570 | return 0; |
3fb02738 | 571 | |
1da177e4 LT |
572 | if (driver->ops.start) { |
573 | result = driver->ops.start(device); | |
574 | if (result && driver->ops.remove) | |
575 | driver->ops.remove(device, ACPI_BUS_REMOVAL_NORMAL); | |
1da177e4 LT |
576 | } |
577 | ||
d550d98d | 578 | return result; |
1da177e4 LT |
579 | } |
580 | ||
9e89dde2 ZR |
581 | /** |
582 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
583 | * @driver: driver being registered | |
584 | * | |
585 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
586 | * devices that match the driver's criteria and binds. Returns zero for | |
587 | * success or a negative error status for failure. | |
588 | */ | |
589 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
1da177e4 | 590 | { |
1890a97a | 591 | int ret; |
1da177e4 | 592 | |
9e89dde2 ZR |
593 | if (acpi_disabled) |
594 | return -ENODEV; | |
1890a97a PM |
595 | driver->drv.name = driver->name; |
596 | driver->drv.bus = &acpi_bus_type; | |
597 | driver->drv.owner = driver->owner; | |
1da177e4 | 598 | |
1890a97a PM |
599 | ret = driver_register(&driver->drv); |
600 | return ret; | |
9e89dde2 | 601 | } |
1da177e4 | 602 | |
9e89dde2 ZR |
603 | EXPORT_SYMBOL(acpi_bus_register_driver); |
604 | ||
605 | /** | |
606 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus | |
607 | * @driver: driver to unregister | |
608 | * | |
609 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
610 | * devices that match the driver's criteria and unbinds. | |
611 | */ | |
612 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
613 | { | |
1890a97a | 614 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
615 | } |
616 | ||
617 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
618 | ||
9e89dde2 ZR |
619 | /* -------------------------------------------------------------------------- |
620 | Device Enumeration | |
621 | -------------------------------------------------------------------------- */ | |
622 | acpi_status | |
623 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
624 | { | |
625 | acpi_status status; | |
626 | acpi_handle tmp; | |
627 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
628 | union acpi_object *obj; | |
629 | ||
630 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
631 | if (ACPI_FAILURE(status)) | |
632 | return status; | |
633 | ||
634 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
635 | if (ACPI_SUCCESS(status)) { | |
636 | obj = buffer.pointer; | |
3b5fee59 HM |
637 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
638 | ejd); | |
9e89dde2 ZR |
639 | kfree(buffer.pointer); |
640 | } | |
641 | return status; | |
642 | } | |
643 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
644 | ||
645 | void acpi_bus_data_handler(acpi_handle handle, u32 function, void *context) | |
646 | { | |
647 | ||
648 | /* TBD */ | |
649 | ||
650 | return; | |
651 | } | |
652 | ||
9e89dde2 ZR |
653 | static int acpi_bus_get_perf_flags(struct acpi_device *device) |
654 | { | |
655 | device->performance.state = ACPI_STATE_UNKNOWN; | |
656 | return 0; | |
657 | } | |
658 | ||
659 | static acpi_status | |
660 | acpi_bus_extract_wakeup_device_power_package(struct acpi_device *device, | |
661 | union acpi_object *package) | |
662 | { | |
663 | int i = 0; | |
664 | union acpi_object *element = NULL; | |
665 | ||
666 | if (!device || !package || (package->package.count < 2)) | |
667 | return AE_BAD_PARAMETER; | |
668 | ||
669 | element = &(package->package.elements[0]); | |
670 | if (!element) | |
671 | return AE_BAD_PARAMETER; | |
672 | if (element->type == ACPI_TYPE_PACKAGE) { | |
673 | if ((element->package.count < 2) || | |
674 | (element->package.elements[0].type != | |
675 | ACPI_TYPE_LOCAL_REFERENCE) | |
676 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) | |
677 | return AE_BAD_DATA; | |
678 | device->wakeup.gpe_device = | |
679 | element->package.elements[0].reference.handle; | |
680 | device->wakeup.gpe_number = | |
681 | (u32) element->package.elements[1].integer.value; | |
682 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
683 | device->wakeup.gpe_number = element->integer.value; | |
684 | } else | |
685 | return AE_BAD_DATA; | |
686 | ||
687 | element = &(package->package.elements[1]); | |
688 | if (element->type != ACPI_TYPE_INTEGER) { | |
689 | return AE_BAD_DATA; | |
690 | } | |
691 | device->wakeup.sleep_state = element->integer.value; | |
692 | ||
693 | if ((package->package.count - 2) > ACPI_MAX_HANDLES) { | |
694 | return AE_NO_MEMORY; | |
695 | } | |
696 | device->wakeup.resources.count = package->package.count - 2; | |
697 | for (i = 0; i < device->wakeup.resources.count; i++) { | |
698 | element = &(package->package.elements[i + 2]); | |
cd0b2248 | 699 | if (element->type != ACPI_TYPE_LOCAL_REFERENCE) |
9e89dde2 | 700 | return AE_BAD_DATA; |
9e89dde2 ZR |
701 | |
702 | device->wakeup.resources.handles[i] = element->reference.handle; | |
1da177e4 | 703 | } |
9e89dde2 ZR |
704 | |
705 | return AE_OK; | |
1da177e4 LT |
706 | } |
707 | ||
9e89dde2 | 708 | static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
1da177e4 | 709 | { |
9e89dde2 ZR |
710 | acpi_status status = 0; |
711 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
712 | union acpi_object *package = NULL; | |
77e76609 | 713 | int psw_error; |
1da177e4 | 714 | |
29b71a1c TR |
715 | struct acpi_device_id button_device_ids[] = { |
716 | {"PNP0C0D", 0}, | |
717 | {"PNP0C0C", 0}, | |
718 | {"PNP0C0E", 0}, | |
719 | {"", 0}, | |
720 | }; | |
721 | ||
9e89dde2 ZR |
722 | /* _PRW */ |
723 | status = acpi_evaluate_object(device->handle, "_PRW", NULL, &buffer); | |
724 | if (ACPI_FAILURE(status)) { | |
725 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
726 | goto end; | |
1da177e4 | 727 | } |
1da177e4 | 728 | |
9e89dde2 ZR |
729 | package = (union acpi_object *)buffer.pointer; |
730 | status = acpi_bus_extract_wakeup_device_power_package(device, package); | |
731 | if (ACPI_FAILURE(status)) { | |
732 | ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package")); | |
733 | goto end; | |
734 | } | |
1da177e4 | 735 | |
9e89dde2 | 736 | kfree(buffer.pointer); |
1da177e4 | 737 | |
9e89dde2 | 738 | device->wakeup.flags.valid = 1; |
729b2bdb ZY |
739 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
740 | * system for the ACPI device with the _PRW object. | |
741 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. | |
742 | * So it is necessary to call _DSW object first. Only when it is not | |
743 | * present will the _PSW object used. | |
744 | */ | |
77e76609 RW |
745 | psw_error = acpi_device_sleep_wake(device, 0, 0, 0); |
746 | if (psw_error) | |
747 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
748 | "error in _DSW or _PSW evaluation\n")); | |
749 | ||
9e89dde2 | 750 | /* Power button, Lid switch always enable wakeup */ |
29b71a1c | 751 | if (!acpi_match_device_ids(device, button_device_ids)) |
9e89dde2 | 752 | device->wakeup.flags.run_wake = 1; |
1da177e4 | 753 | |
9e89dde2 ZR |
754 | end: |
755 | if (ACPI_FAILURE(status)) | |
756 | device->flags.wake_capable = 0; | |
d550d98d | 757 | return 0; |
1da177e4 | 758 | } |
1da177e4 | 759 | |
9e89dde2 | 760 | static int acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 761 | { |
9e89dde2 ZR |
762 | acpi_status status = 0; |
763 | acpi_handle handle = NULL; | |
764 | u32 i = 0; | |
1a365616 | 765 | |
4be44fcd | 766 | |
9e89dde2 ZR |
767 | /* |
768 | * Power Management Flags | |
769 | */ | |
770 | status = acpi_get_handle(device->handle, "_PSC", &handle); | |
771 | if (ACPI_SUCCESS(status)) | |
772 | device->power.flags.explicit_get = 1; | |
773 | status = acpi_get_handle(device->handle, "_IRC", &handle); | |
774 | if (ACPI_SUCCESS(status)) | |
775 | device->power.flags.inrush_current = 1; | |
1da177e4 | 776 | |
9e89dde2 ZR |
777 | /* |
778 | * Enumerate supported power management states | |
779 | */ | |
780 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3; i++) { | |
781 | struct acpi_device_power_state *ps = &device->power.states[i]; | |
782 | char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' }; | |
1da177e4 | 783 | |
9e89dde2 ZR |
784 | /* Evaluate "_PRx" to se if power resources are referenced */ |
785 | acpi_evaluate_reference(device->handle, object_name, NULL, | |
786 | &ps->resources); | |
787 | if (ps->resources.count) { | |
788 | device->power.flags.power_resources = 1; | |
789 | ps->flags.valid = 1; | |
1da177e4 | 790 | } |
1da177e4 | 791 | |
9e89dde2 ZR |
792 | /* Evaluate "_PSx" to see if we can do explicit sets */ |
793 | object_name[2] = 'S'; | |
794 | status = acpi_get_handle(device->handle, object_name, &handle); | |
795 | if (ACPI_SUCCESS(status)) { | |
796 | ps->flags.explicit_set = 1; | |
797 | ps->flags.valid = 1; | |
1da177e4 | 798 | } |
1da177e4 | 799 | |
9e89dde2 ZR |
800 | /* State is valid if we have some power control */ |
801 | if (ps->resources.count || ps->flags.explicit_set) | |
802 | ps->flags.valid = 1; | |
1da177e4 | 803 | |
9e89dde2 ZR |
804 | ps->power = -1; /* Unknown - driver assigned */ |
805 | ps->latency = -1; /* Unknown - driver assigned */ | |
806 | } | |
1da177e4 | 807 | |
9e89dde2 ZR |
808 | /* Set defaults for D0 and D3 states (always valid) */ |
809 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
810 | device->power.states[ACPI_STATE_D0].power = 100; | |
811 | device->power.states[ACPI_STATE_D3].flags.valid = 1; | |
812 | device->power.states[ACPI_STATE_D3].power = 0; | |
c8f7a62c | 813 | |
9e89dde2 | 814 | /* TBD: System wake support and resource requirements. */ |
c8f7a62c | 815 | |
9e89dde2 | 816 | device->power.state = ACPI_STATE_UNKNOWN; |
a51e145f | 817 | acpi_bus_get_power(device->handle, &(device->power.state)); |
c8f7a62c | 818 | |
9e89dde2 ZR |
819 | return 0; |
820 | } | |
c8f7a62c | 821 | |
4be44fcd | 822 | static int acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 823 | { |
4be44fcd LB |
824 | acpi_status status = AE_OK; |
825 | acpi_handle temp = NULL; | |
1da177e4 | 826 | |
1da177e4 LT |
827 | |
828 | /* Presence of _STA indicates 'dynamic_status' */ | |
829 | status = acpi_get_handle(device->handle, "_STA", &temp); | |
830 | if (ACPI_SUCCESS(status)) | |
831 | device->flags.dynamic_status = 1; | |
832 | ||
833 | /* Presence of _CID indicates 'compatible_ids' */ | |
834 | status = acpi_get_handle(device->handle, "_CID", &temp); | |
835 | if (ACPI_SUCCESS(status)) | |
836 | device->flags.compatible_ids = 1; | |
837 | ||
838 | /* Presence of _RMV indicates 'removable' */ | |
839 | status = acpi_get_handle(device->handle, "_RMV", &temp); | |
840 | if (ACPI_SUCCESS(status)) | |
841 | device->flags.removable = 1; | |
842 | ||
843 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
844 | status = acpi_get_handle(device->handle, "_EJD", &temp); | |
845 | if (ACPI_SUCCESS(status)) | |
846 | device->flags.ejectable = 1; | |
847 | else { | |
848 | status = acpi_get_handle(device->handle, "_EJ0", &temp); | |
849 | if (ACPI_SUCCESS(status)) | |
850 | device->flags.ejectable = 1; | |
851 | } | |
852 | ||
853 | /* Presence of _LCK indicates 'lockable' */ | |
854 | status = acpi_get_handle(device->handle, "_LCK", &temp); | |
855 | if (ACPI_SUCCESS(status)) | |
856 | device->flags.lockable = 1; | |
857 | ||
858 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ | |
859 | status = acpi_get_handle(device->handle, "_PS0", &temp); | |
860 | if (ACPI_FAILURE(status)) | |
861 | status = acpi_get_handle(device->handle, "_PR0", &temp); | |
862 | if (ACPI_SUCCESS(status)) | |
863 | device->flags.power_manageable = 1; | |
864 | ||
865 | /* Presence of _PRW indicates wake capable */ | |
866 | status = acpi_get_handle(device->handle, "_PRW", &temp); | |
867 | if (ACPI_SUCCESS(status)) | |
868 | device->flags.wake_capable = 1; | |
869 | ||
3c5f9be4 | 870 | /* TBD: Performance management */ |
1da177e4 | 871 | |
d550d98d | 872 | return 0; |
1da177e4 LT |
873 | } |
874 | ||
4be44fcd LB |
875 | static void acpi_device_get_busid(struct acpi_device *device, |
876 | acpi_handle handle, int type) | |
1da177e4 | 877 | { |
4be44fcd LB |
878 | char bus_id[5] = { '?', 0 }; |
879 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
880 | int i = 0; | |
1da177e4 LT |
881 | |
882 | /* | |
883 | * Bus ID | |
884 | * ------ | |
885 | * The device's Bus ID is simply the object name. | |
886 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
887 | */ | |
888 | switch (type) { | |
889 | case ACPI_BUS_TYPE_SYSTEM: | |
890 | strcpy(device->pnp.bus_id, "ACPI"); | |
891 | break; | |
892 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
893 | strcpy(device->pnp.bus_id, "PWRF"); | |
894 | break; | |
895 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
896 | strcpy(device->pnp.bus_id, "SLPF"); | |
897 | break; | |
898 | default: | |
899 | acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer); | |
900 | /* Clean up trailing underscores (if any) */ | |
901 | for (i = 3; i > 1; i--) { | |
902 | if (bus_id[i] == '_') | |
903 | bus_id[i] = '\0'; | |
904 | else | |
905 | break; | |
906 | } | |
907 | strcpy(device->pnp.bus_id, bus_id); | |
908 | break; | |
909 | } | |
910 | } | |
911 | ||
54735266 ZR |
912 | /* |
913 | * acpi_bay_match - see if a device is an ejectable driver bay | |
914 | * | |
915 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
916 | * then we can safely call it an ejectable drive bay | |
917 | */ | |
918 | static int acpi_bay_match(struct acpi_device *device){ | |
919 | acpi_status status; | |
920 | acpi_handle handle; | |
921 | acpi_handle tmp; | |
922 | acpi_handle phandle; | |
923 | ||
924 | handle = device->handle; | |
925 | ||
926 | status = acpi_get_handle(handle, "_EJ0", &tmp); | |
927 | if (ACPI_FAILURE(status)) | |
928 | return -ENODEV; | |
929 | ||
930 | if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || | |
931 | (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || | |
932 | (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || | |
933 | (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) | |
934 | return 0; | |
935 | ||
936 | if (acpi_get_parent(handle, &phandle)) | |
937 | return -ENODEV; | |
938 | ||
939 | if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) || | |
940 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) || | |
941 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) || | |
942 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp)))) | |
943 | return 0; | |
944 | ||
945 | return -ENODEV; | |
946 | } | |
947 | ||
3620f2f2 FS |
948 | /* |
949 | * acpi_dock_match - see if a device has a _DCK method | |
950 | */ | |
951 | static int acpi_dock_match(struct acpi_device *device) | |
952 | { | |
953 | acpi_handle tmp; | |
954 | return acpi_get_handle(device->handle, "_DCK", &tmp); | |
955 | } | |
956 | ||
4be44fcd LB |
957 | static void acpi_device_set_id(struct acpi_device *device, |
958 | struct acpi_device *parent, acpi_handle handle, | |
959 | int type) | |
1da177e4 | 960 | { |
4be44fcd LB |
961 | struct acpi_device_info *info; |
962 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
963 | char *hid = NULL; | |
964 | char *uid = NULL; | |
1da177e4 | 965 | struct acpi_compatible_id_list *cid_list = NULL; |
3620f2f2 | 966 | const char *cid_add = NULL; |
4be44fcd | 967 | acpi_status status; |
1da177e4 LT |
968 | |
969 | switch (type) { | |
970 | case ACPI_BUS_TYPE_DEVICE: | |
971 | status = acpi_get_object_info(handle, &buffer); | |
972 | if (ACPI_FAILURE(status)) { | |
96b2dd1f | 973 | printk(KERN_ERR PREFIX "%s: Error reading device info\n", __func__); |
1da177e4 LT |
974 | return; |
975 | } | |
976 | ||
977 | info = buffer.pointer; | |
978 | if (info->valid & ACPI_VALID_HID) | |
979 | hid = info->hardware_id.value; | |
980 | if (info->valid & ACPI_VALID_UID) | |
981 | uid = info->unique_id.value; | |
982 | if (info->valid & ACPI_VALID_CID) | |
983 | cid_list = &info->compatibility_id; | |
984 | if (info->valid & ACPI_VALID_ADR) { | |
985 | device->pnp.bus_address = info->address; | |
986 | device->flags.bus_address = 1; | |
987 | } | |
ae843332 | 988 | |
3620f2f2 FS |
989 | /* If we have a video/bay/dock device, add our selfdefined |
990 | HID to the CID list. Like that the video/bay/dock drivers | |
991 | will get autoloaded and the device might still match | |
992 | against another driver. | |
993 | */ | |
c3d6de69 | 994 | if (acpi_is_video_device(device)) |
3620f2f2 FS |
995 | cid_add = ACPI_VIDEO_HID; |
996 | else if (ACPI_SUCCESS(acpi_bay_match(device))) | |
997 | cid_add = ACPI_BAY_HID; | |
998 | else if (ACPI_SUCCESS(acpi_dock_match(device))) | |
999 | cid_add = ACPI_DOCK_HID; | |
54735266 | 1000 | |
1da177e4 LT |
1001 | break; |
1002 | case ACPI_BUS_TYPE_POWER: | |
1003 | hid = ACPI_POWER_HID; | |
1004 | break; | |
1005 | case ACPI_BUS_TYPE_PROCESSOR: | |
ad93a765 | 1006 | hid = ACPI_PROCESSOR_OBJECT_HID; |
1da177e4 LT |
1007 | break; |
1008 | case ACPI_BUS_TYPE_SYSTEM: | |
1009 | hid = ACPI_SYSTEM_HID; | |
1010 | break; | |
1011 | case ACPI_BUS_TYPE_THERMAL: | |
1012 | hid = ACPI_THERMAL_HID; | |
1013 | break; | |
1014 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
1015 | hid = ACPI_BUTTON_HID_POWERF; | |
1016 | break; | |
1017 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
1018 | hid = ACPI_BUTTON_HID_SLEEPF; | |
1019 | break; | |
1020 | } | |
1021 | ||
1022 | /* | |
1023 | * \_SB | |
1024 | * ---- | |
1025 | * Fix for the system root bus device -- the only root-level device. | |
1026 | */ | |
c51a4de8 | 1027 | if (((acpi_handle)parent == ACPI_ROOT_OBJECT) && (type == ACPI_BUS_TYPE_DEVICE)) { |
1da177e4 LT |
1028 | hid = ACPI_BUS_HID; |
1029 | strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME); | |
1030 | strcpy(device->pnp.device_class, ACPI_BUS_CLASS); | |
1031 | } | |
1032 | ||
1033 | if (hid) { | |
1034 | strcpy(device->pnp.hardware_id, hid); | |
1035 | device->flags.hardware_id = 1; | |
1036 | } | |
1037 | if (uid) { | |
1038 | strcpy(device->pnp.unique_id, uid); | |
1039 | device->flags.unique_id = 1; | |
1040 | } | |
3620f2f2 FS |
1041 | if (cid_list || cid_add) { |
1042 | struct acpi_compatible_id_list *list; | |
1043 | int size = 0; | |
1044 | int count = 0; | |
1045 | ||
1046 | if (cid_list) { | |
1047 | size = cid_list->size; | |
1048 | } else if (cid_add) { | |
1049 | size = sizeof(struct acpi_compatible_id_list); | |
1050 | cid_list = ACPI_ALLOCATE_ZEROED((acpi_size) size); | |
1051 | if (!cid_list) { | |
1052 | printk(KERN_ERR "Memory allocation error\n"); | |
1053 | kfree(buffer.pointer); | |
1054 | return; | |
1055 | } else { | |
1056 | cid_list->count = 0; | |
1057 | cid_list->size = size; | |
1058 | } | |
1059 | } | |
1060 | if (cid_add) | |
1061 | size += sizeof(struct acpi_compatible_id); | |
1062 | list = kmalloc(size, GFP_KERNEL); | |
1063 | ||
1064 | if (list) { | |
1065 | if (cid_list) { | |
1066 | memcpy(list, cid_list, cid_list->size); | |
1067 | count = cid_list->count; | |
1068 | } | |
1069 | if (cid_add) { | |
1070 | strncpy(list->id[count].value, cid_add, | |
1071 | ACPI_MAX_CID_LENGTH); | |
1072 | count++; | |
1073 | device->flags.compatible_ids = 1; | |
1074 | } | |
1075 | list->size = size; | |
1076 | list->count = count; | |
1077 | device->pnp.cid_list = list; | |
1078 | } else | |
87ecd5cd | 1079 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
1da177e4 LT |
1080 | } |
1081 | ||
02438d87 | 1082 | kfree(buffer.pointer); |
1da177e4 LT |
1083 | } |
1084 | ||
4be44fcd | 1085 | static int acpi_device_set_context(struct acpi_device *device, int type) |
1da177e4 LT |
1086 | { |
1087 | acpi_status status = AE_OK; | |
1088 | int result = 0; | |
1089 | /* | |
1090 | * Context | |
1091 | * ------- | |
1092 | * Attach this 'struct acpi_device' to the ACPI object. This makes | |
1093 | * resolutions from handle->device very efficient. Note that we need | |
1094 | * to be careful with fixed-feature devices as they all attach to the | |
1095 | * root object. | |
1096 | */ | |
4be44fcd | 1097 | if (type != ACPI_BUS_TYPE_POWER_BUTTON && |
1da177e4 LT |
1098 | type != ACPI_BUS_TYPE_SLEEP_BUTTON) { |
1099 | status = acpi_attach_data(device->handle, | |
4be44fcd | 1100 | acpi_bus_data_handler, device); |
1da177e4 LT |
1101 | |
1102 | if (ACPI_FAILURE(status)) { | |
87ecd5cd | 1103 | printk(KERN_ERR PREFIX "Error attaching device data\n"); |
1da177e4 LT |
1104 | result = -ENODEV; |
1105 | } | |
1106 | } | |
1107 | return result; | |
1108 | } | |
1109 | ||
4be44fcd | 1110 | static int acpi_bus_remove(struct acpi_device *dev, int rmdevice) |
1da177e4 | 1111 | { |
1da177e4 | 1112 | if (!dev) |
d550d98d | 1113 | return -EINVAL; |
1da177e4 | 1114 | |
96333578 | 1115 | dev->removal_type = ACPI_BUS_REMOVAL_EJECT; |
1890a97a | 1116 | device_release_driver(&dev->dev); |
1da177e4 LT |
1117 | |
1118 | if (!rmdevice) | |
d550d98d | 1119 | return 0; |
1da177e4 | 1120 | |
2786f6e3 RZ |
1121 | /* |
1122 | * unbind _ADR-Based Devices when hot removal | |
1123 | */ | |
1da177e4 LT |
1124 | if (dev->flags.bus_address) { |
1125 | if ((dev->parent) && (dev->parent->ops.unbind)) | |
1126 | dev->parent->ops.unbind(dev); | |
1127 | } | |
1da177e4 LT |
1128 | acpi_device_unregister(dev, ACPI_BUS_REMOVAL_EJECT); |
1129 | ||
d550d98d | 1130 | return 0; |
1da177e4 LT |
1131 | } |
1132 | ||
3fb02738 | 1133 | static int |
4be44fcd | 1134 | acpi_add_single_object(struct acpi_device **child, |
c4168bff LS |
1135 | struct acpi_device *parent, acpi_handle handle, int type, |
1136 | struct acpi_bus_ops *ops) | |
1da177e4 | 1137 | { |
4be44fcd LB |
1138 | int result = 0; |
1139 | struct acpi_device *device = NULL; | |
1da177e4 | 1140 | |
1da177e4 LT |
1141 | |
1142 | if (!child) | |
d550d98d | 1143 | return -EINVAL; |
1da177e4 | 1144 | |
36bcbec7 | 1145 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 1146 | if (!device) { |
6468463a | 1147 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 1148 | return -ENOMEM; |
1da177e4 | 1149 | } |
1da177e4 LT |
1150 | |
1151 | device->handle = handle; | |
1152 | device->parent = parent; | |
c4168bff LS |
1153 | device->bus_ops = *ops; /* workround for not call .start */ |
1154 | ||
1da177e4 | 1155 | |
4be44fcd | 1156 | acpi_device_get_busid(device, handle, type); |
1da177e4 LT |
1157 | |
1158 | /* | |
1159 | * Flags | |
1160 | * ----- | |
1161 | * Get prior to calling acpi_bus_get_status() so we know whether | |
1162 | * or not _STA is present. Note that we only look for object | |
1163 | * handles -- cannot evaluate objects until we know the device is | |
1164 | * present and properly initialized. | |
1165 | */ | |
1166 | result = acpi_bus_get_flags(device); | |
1167 | if (result) | |
1168 | goto end; | |
1169 | ||
1170 | /* | |
1171 | * Status | |
1172 | * ------ | |
6940faba KT |
1173 | * See if the device is present. We always assume that non-Device |
1174 | * and non-Processor objects (e.g. thermal zones, power resources, | |
1175 | * etc.) are present, functioning, etc. (at least when parent object | |
1176 | * is present). Note that _STA has a different meaning for some | |
1177 | * objects (e.g. power resources) so we need to be careful how we use | |
1178 | * it. | |
1da177e4 LT |
1179 | */ |
1180 | switch (type) { | |
6940faba | 1181 | case ACPI_BUS_TYPE_PROCESSOR: |
1da177e4 LT |
1182 | case ACPI_BUS_TYPE_DEVICE: |
1183 | result = acpi_bus_get_status(device); | |
3620f2f2 FS |
1184 | if (ACPI_FAILURE(result)) { |
1185 | result = -ENODEV; | |
1da177e4 LT |
1186 | goto end; |
1187 | } | |
39a0ad87 ZY |
1188 | /* |
1189 | * When the device is neither present nor functional, the | |
1190 | * device should not be added to Linux ACPI device tree. | |
1191 | * When the status of the device is not present but functinal, | |
1192 | * it should be added to Linux ACPI tree. For example : bay | |
1193 | * device , dock device. | |
1194 | * In such conditions it is unncessary to check whether it is | |
1195 | * bay device or dock device. | |
1196 | */ | |
1197 | if (!device->status.present && !device->status.functional) { | |
1198 | result = -ENODEV; | |
1199 | goto end; | |
3620f2f2 | 1200 | } |
1da177e4 LT |
1201 | break; |
1202 | default: | |
0c0e8921 BH |
1203 | STRUCT_TO_INT(device->status) = |
1204 | ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | | |
1205 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; | |
1da177e4 LT |
1206 | break; |
1207 | } | |
1208 | ||
1209 | /* | |
1210 | * Initialize Device | |
1211 | * ----------------- | |
1212 | * TBD: Synch with Core's enumeration/initialization process. | |
1213 | */ | |
1214 | ||
1215 | /* | |
1216 | * Hardware ID, Unique ID, & Bus Address | |
1217 | * ------------------------------------- | |
1218 | */ | |
4be44fcd | 1219 | acpi_device_set_id(device, parent, handle, type); |
1da177e4 | 1220 | |
eab4b645 ZY |
1221 | /* |
1222 | * The ACPI device is attached to acpi handle before getting | |
1223 | * the power/wakeup/peformance flags. Otherwise OS can't get | |
1224 | * the corresponding ACPI device by the acpi handle in the course | |
1225 | * of getting the power/wakeup/performance flags. | |
1226 | */ | |
1227 | result = acpi_device_set_context(device, type); | |
1228 | if (result) | |
1229 | goto end; | |
1230 | ||
1da177e4 LT |
1231 | /* |
1232 | * Power Management | |
1233 | * ---------------- | |
1234 | */ | |
1235 | if (device->flags.power_manageable) { | |
1236 | result = acpi_bus_get_power_flags(device); | |
1237 | if (result) | |
1238 | goto end; | |
1239 | } | |
1240 | ||
4be44fcd | 1241 | /* |
1da177e4 LT |
1242 | * Wakeup device management |
1243 | *----------------------- | |
1244 | */ | |
1245 | if (device->flags.wake_capable) { | |
1246 | result = acpi_bus_get_wakeup_device_flags(device); | |
1247 | if (result) | |
1248 | goto end; | |
1249 | } | |
1250 | ||
1251 | /* | |
1252 | * Performance Management | |
1253 | * ---------------------- | |
1254 | */ | |
1255 | if (device->flags.performance_manageable) { | |
1256 | result = acpi_bus_get_perf_flags(device); | |
1257 | if (result) | |
1258 | goto end; | |
1259 | } | |
1260 | ||
1da177e4 | 1261 | |
e49bd2dd | 1262 | result = acpi_device_register(device, parent); |
1da177e4 LT |
1263 | |
1264 | /* | |
2786f6e3 | 1265 | * Bind _ADR-Based Devices when hot add |
1da177e4 LT |
1266 | */ |
1267 | if (device->flags.bus_address) { | |
1268 | if (device->parent && device->parent->ops.bind) | |
1269 | device->parent->ops.bind(device); | |
1270 | } | |
1271 | ||
4be44fcd | 1272 | end: |
1da177e4 LT |
1273 | if (!result) |
1274 | *child = device; | |
1275 | else { | |
6044ec88 | 1276 | kfree(device->pnp.cid_list); |
1da177e4 LT |
1277 | kfree(device); |
1278 | } | |
1279 | ||
d550d98d | 1280 | return result; |
1da177e4 | 1281 | } |
1da177e4 | 1282 | |
4be44fcd | 1283 | static int acpi_bus_scan(struct acpi_device *start, struct acpi_bus_ops *ops) |
1da177e4 | 1284 | { |
4be44fcd LB |
1285 | acpi_status status = AE_OK; |
1286 | struct acpi_device *parent = NULL; | |
1287 | struct acpi_device *child = NULL; | |
1288 | acpi_handle phandle = NULL; | |
1289 | acpi_handle chandle = NULL; | |
1290 | acpi_object_type type = 0; | |
1291 | u32 level = 1; | |
1da177e4 | 1292 | |
1da177e4 LT |
1293 | |
1294 | if (!start) | |
d550d98d | 1295 | return -EINVAL; |
1da177e4 LT |
1296 | |
1297 | parent = start; | |
1298 | phandle = start->handle; | |
4be44fcd | 1299 | |
1da177e4 LT |
1300 | /* |
1301 | * Parse through the ACPI namespace, identify all 'devices', and | |
1302 | * create a new 'struct acpi_device' for each. | |
1303 | */ | |
1304 | while ((level > 0) && parent) { | |
1305 | ||
1306 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, | |
4be44fcd | 1307 | chandle, &chandle); |
1da177e4 LT |
1308 | |
1309 | /* | |
1310 | * If this scope is exhausted then move our way back up. | |
1311 | */ | |
1312 | if (ACPI_FAILURE(status)) { | |
1313 | level--; | |
1314 | chandle = phandle; | |
1315 | acpi_get_parent(phandle, &phandle); | |
1316 | if (parent->parent) | |
1317 | parent = parent->parent; | |
1318 | continue; | |
1319 | } | |
1320 | ||
1321 | status = acpi_get_type(chandle, &type); | |
1322 | if (ACPI_FAILURE(status)) | |
1323 | continue; | |
1324 | ||
1325 | /* | |
1326 | * If this is a scope object then parse it (depth-first). | |
1327 | */ | |
1328 | if (type == ACPI_TYPE_LOCAL_SCOPE) { | |
1329 | level++; | |
1330 | phandle = chandle; | |
1331 | chandle = NULL; | |
1332 | continue; | |
1333 | } | |
1334 | ||
1335 | /* | |
1336 | * We're only interested in objects that we consider 'devices'. | |
1337 | */ | |
1338 | switch (type) { | |
1339 | case ACPI_TYPE_DEVICE: | |
1340 | type = ACPI_BUS_TYPE_DEVICE; | |
1341 | break; | |
1342 | case ACPI_TYPE_PROCESSOR: | |
1343 | type = ACPI_BUS_TYPE_PROCESSOR; | |
1344 | break; | |
1345 | case ACPI_TYPE_THERMAL: | |
1346 | type = ACPI_BUS_TYPE_THERMAL; | |
1347 | break; | |
1348 | case ACPI_TYPE_POWER: | |
1349 | type = ACPI_BUS_TYPE_POWER; | |
1350 | break; | |
1351 | default: | |
1352 | continue; | |
1353 | } | |
1354 | ||
3fb02738 RS |
1355 | if (ops->acpi_op_add) |
1356 | status = acpi_add_single_object(&child, parent, | |
c4168bff | 1357 | chandle, type, ops); |
4be44fcd | 1358 | else |
3fb02738 RS |
1359 | status = acpi_bus_get_device(chandle, &child); |
1360 | ||
4be44fcd LB |
1361 | if (ACPI_FAILURE(status)) |
1362 | continue; | |
3fb02738 | 1363 | |
c4168bff | 1364 | if (ops->acpi_op_start && !(ops->acpi_op_add)) { |
3fb02738 RS |
1365 | status = acpi_start_single_object(child); |
1366 | if (ACPI_FAILURE(status)) | |
1367 | continue; | |
1368 | } | |
1da177e4 LT |
1369 | |
1370 | /* | |
1371 | * If the device is present, enabled, and functioning then | |
1372 | * parse its scope (depth-first). Note that we need to | |
1373 | * represent absent devices to facilitate PnP notifications | |
1374 | * -- but only the subtree head (not all of its children, | |
1375 | * which will be enumerated when the parent is inserted). | |
1376 | * | |
1377 | * TBD: Need notifications and other detection mechanisms | |
4be44fcd | 1378 | * in place before we can fully implement this. |
1da177e4 | 1379 | */ |
39a0ad87 ZY |
1380 | /* |
1381 | * When the device is not present but functional, it is also | |
1382 | * necessary to scan the children of this device. | |
1383 | */ | |
1384 | if (child->status.present || (!child->status.present && | |
1385 | child->status.functional)) { | |
1da177e4 LT |
1386 | status = acpi_get_next_object(ACPI_TYPE_ANY, chandle, |
1387 | NULL, NULL); | |
1388 | if (ACPI_SUCCESS(status)) { | |
1389 | level++; | |
1390 | phandle = chandle; | |
1391 | chandle = NULL; | |
1392 | parent = child; | |
1393 | } | |
1394 | } | |
1395 | } | |
1396 | ||
d550d98d | 1397 | return 0; |
1da177e4 | 1398 | } |
1da177e4 | 1399 | |
3fb02738 | 1400 | int |
4be44fcd LB |
1401 | acpi_bus_add(struct acpi_device **child, |
1402 | struct acpi_device *parent, acpi_handle handle, int type) | |
3fb02738 RS |
1403 | { |
1404 | int result; | |
1405 | struct acpi_bus_ops ops; | |
1406 | ||
c4168bff LS |
1407 | memset(&ops, 0, sizeof(ops)); |
1408 | ops.acpi_op_add = 1; | |
3fb02738 | 1409 | |
c4168bff LS |
1410 | result = acpi_add_single_object(child, parent, handle, type, &ops); |
1411 | if (!result) | |
3fb02738 | 1412 | result = acpi_bus_scan(*child, &ops); |
c4168bff | 1413 | |
d550d98d | 1414 | return result; |
3fb02738 | 1415 | } |
4be44fcd | 1416 | |
3fb02738 RS |
1417 | EXPORT_SYMBOL(acpi_bus_add); |
1418 | ||
4be44fcd | 1419 | int acpi_bus_start(struct acpi_device *device) |
3fb02738 RS |
1420 | { |
1421 | int result; | |
1422 | struct acpi_bus_ops ops; | |
1423 | ||
3fb02738 RS |
1424 | |
1425 | if (!device) | |
d550d98d | 1426 | return -EINVAL; |
3fb02738 RS |
1427 | |
1428 | result = acpi_start_single_object(device); | |
1429 | if (!result) { | |
1430 | memset(&ops, 0, sizeof(ops)); | |
1431 | ops.acpi_op_start = 1; | |
1432 | result = acpi_bus_scan(device, &ops); | |
1433 | } | |
d550d98d | 1434 | return result; |
3fb02738 | 1435 | } |
4be44fcd | 1436 | |
3fb02738 | 1437 | EXPORT_SYMBOL(acpi_bus_start); |
1da177e4 | 1438 | |
ceaba663 | 1439 | int acpi_bus_trim(struct acpi_device *start, int rmdevice) |
1da177e4 | 1440 | { |
4be44fcd LB |
1441 | acpi_status status; |
1442 | struct acpi_device *parent, *child; | |
1443 | acpi_handle phandle, chandle; | |
1444 | acpi_object_type type; | |
1445 | u32 level = 1; | |
1446 | int err = 0; | |
1447 | ||
1448 | parent = start; | |
1da177e4 LT |
1449 | phandle = start->handle; |
1450 | child = chandle = NULL; | |
1451 | ||
1452 | while ((level > 0) && parent && (!err)) { | |
1453 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, | |
4be44fcd | 1454 | chandle, &chandle); |
1da177e4 LT |
1455 | |
1456 | /* | |
1457 | * If this scope is exhausted then move our way back up. | |
1458 | */ | |
1459 | if (ACPI_FAILURE(status)) { | |
1460 | level--; | |
1461 | chandle = phandle; | |
1462 | acpi_get_parent(phandle, &phandle); | |
1463 | child = parent; | |
1464 | parent = parent->parent; | |
1465 | ||
1466 | if (level == 0) | |
1467 | err = acpi_bus_remove(child, rmdevice); | |
1468 | else | |
1469 | err = acpi_bus_remove(child, 1); | |
1470 | ||
1471 | continue; | |
1472 | } | |
1473 | ||
1474 | status = acpi_get_type(chandle, &type); | |
1475 | if (ACPI_FAILURE(status)) { | |
1476 | continue; | |
1477 | } | |
1478 | /* | |
1479 | * If there is a device corresponding to chandle then | |
1480 | * parse it (depth-first). | |
1481 | */ | |
1482 | if (acpi_bus_get_device(chandle, &child) == 0) { | |
1483 | level++; | |
1484 | phandle = chandle; | |
1485 | chandle = NULL; | |
1486 | parent = child; | |
1487 | } | |
1488 | continue; | |
1489 | } | |
1490 | return err; | |
1491 | } | |
ceaba663 KA |
1492 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
1493 | ||
1da177e4 | 1494 | |
4be44fcd | 1495 | static int acpi_bus_scan_fixed(struct acpi_device *root) |
1da177e4 | 1496 | { |
4be44fcd LB |
1497 | int result = 0; |
1498 | struct acpi_device *device = NULL; | |
c4168bff | 1499 | struct acpi_bus_ops ops; |
1da177e4 LT |
1500 | |
1501 | if (!root) | |
d550d98d | 1502 | return -ENODEV; |
1da177e4 | 1503 | |
c4168bff LS |
1504 | memset(&ops, 0, sizeof(ops)); |
1505 | ops.acpi_op_add = 1; | |
1506 | ops.acpi_op_start = 1; | |
1507 | ||
1da177e4 LT |
1508 | /* |
1509 | * Enumerate all fixed-feature devices. | |
1510 | */ | |
cee324b1 | 1511 | if ((acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON) == 0) { |
3fb02738 | 1512 | result = acpi_add_single_object(&device, acpi_root, |
4be44fcd | 1513 | NULL, |
c4168bff LS |
1514 | ACPI_BUS_TYPE_POWER_BUTTON, |
1515 | &ops); | |
3fb02738 | 1516 | } |
1da177e4 | 1517 | |
cee324b1 | 1518 | if ((acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON) == 0) { |
3fb02738 | 1519 | result = acpi_add_single_object(&device, acpi_root, |
4be44fcd | 1520 | NULL, |
c4168bff LS |
1521 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
1522 | &ops); | |
3fb02738 | 1523 | } |
1da177e4 | 1524 | |
d550d98d | 1525 | return result; |
1da177e4 LT |
1526 | } |
1527 | ||
c04209a7 | 1528 | |
1da177e4 LT |
1529 | static int __init acpi_scan_init(void) |
1530 | { | |
1531 | int result; | |
3fb02738 | 1532 | struct acpi_bus_ops ops; |
1da177e4 | 1533 | |
1da177e4 LT |
1534 | |
1535 | if (acpi_disabled) | |
d550d98d | 1536 | return 0; |
1da177e4 | 1537 | |
c4168bff LS |
1538 | memset(&ops, 0, sizeof(ops)); |
1539 | ops.acpi_op_add = 1; | |
1540 | ops.acpi_op_start = 1; | |
1da177e4 | 1541 | |
5b327265 PM |
1542 | result = bus_register(&acpi_bus_type); |
1543 | if (result) { | |
1544 | /* We don't want to quit even if we failed to add suspend/resume */ | |
1545 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
1546 | } | |
1547 | ||
1da177e4 LT |
1548 | /* |
1549 | * Create the root device in the bus's device tree | |
1550 | */ | |
3fb02738 | 1551 | result = acpi_add_single_object(&acpi_root, NULL, ACPI_ROOT_OBJECT, |
c4168bff | 1552 | ACPI_BUS_TYPE_SYSTEM, &ops); |
1da177e4 LT |
1553 | if (result) |
1554 | goto Done; | |
1555 | ||
1556 | /* | |
1557 | * Enumerate devices in the ACPI namespace. | |
1558 | */ | |
1559 | result = acpi_bus_scan_fixed(acpi_root); | |
c04209a7 | 1560 | |
c4168bff | 1561 | if (!result) |
3fb02738 | 1562 | result = acpi_bus_scan(acpi_root, &ops); |
1da177e4 LT |
1563 | |
1564 | if (result) | |
1565 | acpi_device_unregister(acpi_root, ACPI_BUS_REMOVAL_NORMAL); | |
1566 | ||
4be44fcd | 1567 | Done: |
d550d98d | 1568 | return result; |
1da177e4 LT |
1569 | } |
1570 | ||
1571 | subsys_initcall(acpi_scan_init); |