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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 LT |
8 | #include <linux/acpi.h> |
9 | ||
10 | #include <acpi/acpi_drivers.h> | |
11 | #include <acpi/acinterp.h> /* for acpi_ex_eisa_id_to_string() */ | |
12 | ||
1da177e4 | 13 | #define _COMPONENT ACPI_BUS_COMPONENT |
f52fd66d | 14 | ACPI_MODULE_NAME("scan"); |
1da177e4 | 15 | #define STRUCT_TO_INT(s) (*((int*)&s)) |
4be44fcd | 16 | extern struct acpi_device *acpi_root; |
1da177e4 LT |
17 | |
18 | #define ACPI_BUS_CLASS "system_bus" | |
29b71a1c | 19 | #define ACPI_BUS_HID "LNXSYBUS" |
1da177e4 LT |
20 | #define ACPI_BUS_DEVICE_NAME "System Bus" |
21 | ||
22 | static LIST_HEAD(acpi_device_list); | |
e49bd2dd | 23 | static LIST_HEAD(acpi_bus_id_list); |
1da177e4 LT |
24 | DEFINE_SPINLOCK(acpi_device_lock); |
25 | LIST_HEAD(acpi_wakeup_device_list); | |
26 | ||
e49bd2dd | 27 | struct acpi_device_bus_id{ |
bb095854 | 28 | char bus_id[15]; |
e49bd2dd ZR |
29 | unsigned int instance_no; |
30 | struct list_head node; | |
1da177e4 | 31 | }; |
29b71a1c TR |
32 | |
33 | /* | |
34 | * Creates hid/cid(s) string needed for modalias and uevent | |
35 | * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: | |
36 | * char *modalias: "acpi:IBM0001:ACPI0001" | |
37 | */ | |
b3e572d2 AB |
38 | static int create_modalias(struct acpi_device *acpi_dev, char *modalias, |
39 | int size) | |
40 | { | |
29b71a1c TR |
41 | int len; |
42 | ||
43 | if (!acpi_dev->flags.hardware_id) | |
44 | return -ENODEV; | |
45 | ||
46 | len = snprintf(modalias, size, "acpi:%s:", | |
47 | acpi_dev->pnp.hardware_id); | |
48 | if (len < 0 || len >= size) | |
49 | return -EINVAL; | |
50 | size -= len; | |
51 | ||
52 | if (acpi_dev->flags.compatible_ids) { | |
53 | struct acpi_compatible_id_list *cid_list; | |
54 | int i; | |
55 | int count; | |
56 | ||
57 | cid_list = acpi_dev->pnp.cid_list; | |
58 | for (i = 0; i < cid_list->count; i++) { | |
59 | count = snprintf(&modalias[len], size, "%s:", | |
60 | cid_list->id[i].value); | |
61 | if (count < 0 || count >= size) { | |
87ecd5cd | 62 | printk(KERN_ERR PREFIX "%s cid[%i] exceeds event buffer size", |
29b71a1c TR |
63 | acpi_dev->pnp.device_name, i); |
64 | break; | |
65 | } | |
66 | len += count; | |
67 | size -= count; | |
68 | } | |
69 | } | |
70 | ||
71 | modalias[len] = '\0'; | |
72 | return len; | |
73 | } | |
74 | ||
75 | static ssize_t | |
76 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
77 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
78 | int len; | |
79 | ||
80 | /* Device has no HID and no CID or string is >1024 */ | |
81 | len = create_modalias(acpi_dev, buf, 1024); | |
82 | if (len <= 0) | |
83 | return 0; | |
84 | buf[len++] = '\n'; | |
85 | return len; | |
86 | } | |
87 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); | |
88 | ||
4be44fcd | 89 | static int acpi_eject_operation(acpi_handle handle, int lockable) |
1da177e4 | 90 | { |
1da177e4 LT |
91 | struct acpi_object_list arg_list; |
92 | union acpi_object arg; | |
93 | acpi_status status = AE_OK; | |
1da177e4 | 94 | |
1da177e4 LT |
95 | /* |
96 | * TBD: evaluate _PS3? | |
97 | */ | |
1da177e4 | 98 | |
1da177e4 LT |
99 | if (lockable) { |
100 | arg_list.count = 1; | |
101 | arg_list.pointer = &arg; | |
102 | arg.type = ACPI_TYPE_INTEGER; | |
103 | arg.integer.value = 0; | |
104 | acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); | |
105 | } | |
1da177e4 | 106 | |
1da177e4 LT |
107 | arg_list.count = 1; |
108 | arg_list.pointer = &arg; | |
109 | arg.type = ACPI_TYPE_INTEGER; | |
110 | arg.integer.value = 1; | |
1da177e4 | 111 | |
1da177e4 LT |
112 | /* |
113 | * TBD: _EJD support. | |
114 | */ | |
1da177e4 | 115 | |
1da177e4 LT |
116 | status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); |
117 | if (ACPI_FAILURE(status)) { | |
4be44fcd | 118 | return (-ENODEV); |
1da177e4 | 119 | } |
1da177e4 | 120 | |
4be44fcd | 121 | return (0); |
1da177e4 LT |
122 | } |
123 | ||
1da177e4 | 124 | static ssize_t |
f883d9db PM |
125 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
126 | const char *buf, size_t count) | |
1da177e4 | 127 | { |
4be44fcd LB |
128 | int result; |
129 | int ret = count; | |
130 | int islockable; | |
131 | acpi_status status; | |
132 | acpi_handle handle; | |
133 | acpi_object_type type = 0; | |
f883d9db | 134 | struct acpi_device *acpi_device = to_acpi_device(d); |
1da177e4 | 135 | |
1da177e4 LT |
136 | if ((!count) || (buf[0] != '1')) { |
137 | return -EINVAL; | |
138 | } | |
1da177e4 | 139 | #ifndef FORCE_EJECT |
f883d9db | 140 | if (acpi_device->driver == NULL) { |
1da177e4 LT |
141 | ret = -ENODEV; |
142 | goto err; | |
143 | } | |
144 | #endif | |
f883d9db PM |
145 | status = acpi_get_type(acpi_device->handle, &type); |
146 | if (ACPI_FAILURE(status) || (!acpi_device->flags.ejectable)) { | |
1da177e4 LT |
147 | ret = -ENODEV; |
148 | goto err; | |
149 | } | |
1da177e4 | 150 | |
f883d9db PM |
151 | islockable = acpi_device->flags.lockable; |
152 | handle = acpi_device->handle; | |
9b6d97b6 | 153 | |
f883d9db | 154 | result = acpi_bus_trim(acpi_device, 1); |
1da177e4 | 155 | |
1da177e4 LT |
156 | if (!result) |
157 | result = acpi_eject_operation(handle, islockable); | |
1da177e4 | 158 | |
1da177e4 LT |
159 | if (result) { |
160 | ret = -EBUSY; | |
161 | } | |
4be44fcd | 162 | err: |
1da177e4 | 163 | return ret; |
1da177e4 LT |
164 | } |
165 | ||
f883d9db | 166 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
1da177e4 | 167 | |
e49bd2dd ZR |
168 | static ssize_t |
169 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
170 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1da177e4 | 171 | |
e49bd2dd | 172 | return sprintf(buf, "%s\n", acpi_dev->pnp.hardware_id); |
1da177e4 | 173 | } |
e49bd2dd | 174 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
1da177e4 | 175 | |
e49bd2dd ZR |
176 | static ssize_t |
177 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
178 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
179 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
180 | int result; | |
1da177e4 | 181 | |
e49bd2dd ZR |
182 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
183 | if(result) | |
184 | goto end; | |
1da177e4 | 185 | |
e49bd2dd ZR |
186 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
187 | kfree(path.pointer); | |
188 | end: | |
189 | return result; | |
1da177e4 | 190 | } |
e49bd2dd | 191 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
1da177e4 | 192 | |
e49bd2dd | 193 | static int acpi_device_setup_files(struct acpi_device *dev) |
1da177e4 | 194 | { |
f883d9db PM |
195 | acpi_status status; |
196 | acpi_handle temp; | |
e49bd2dd | 197 | int result = 0; |
1da177e4 LT |
198 | |
199 | /* | |
e49bd2dd | 200 | * Devices gotten from FADT don't have a "path" attribute |
1da177e4 | 201 | */ |
e49bd2dd ZR |
202 | if(dev->handle) { |
203 | result = device_create_file(&dev->dev, &dev_attr_path); | |
204 | if(result) | |
205 | goto end; | |
1da177e4 LT |
206 | } |
207 | ||
e49bd2dd ZR |
208 | if(dev->flags.hardware_id) { |
209 | result = device_create_file(&dev->dev, &dev_attr_hid); | |
210 | if(result) | |
211 | goto end; | |
212 | } | |
1da177e4 | 213 | |
29b71a1c TR |
214 | if (dev->flags.hardware_id || dev->flags.compatible_ids){ |
215 | result = device_create_file(&dev->dev, &dev_attr_modalias); | |
216 | if(result) | |
217 | goto end; | |
218 | } | |
219 | ||
e49bd2dd ZR |
220 | /* |
221 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
222 | * hot-removal function from userland. | |
223 | */ | |
f883d9db PM |
224 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); |
225 | if (ACPI_SUCCESS(status)) | |
e49bd2dd ZR |
226 | result = device_create_file(&dev->dev, &dev_attr_eject); |
227 | end: | |
228 | return result; | |
1da177e4 LT |
229 | } |
230 | ||
f883d9db | 231 | static void acpi_device_remove_files(struct acpi_device *dev) |
1da177e4 | 232 | { |
f883d9db PM |
233 | acpi_status status; |
234 | acpi_handle temp; | |
1da177e4 | 235 | |
f883d9db PM |
236 | /* |
237 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
238 | * hot-removal function from userland. | |
239 | */ | |
240 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); | |
241 | if (ACPI_SUCCESS(status)) | |
242 | device_remove_file(&dev->dev, &dev_attr_eject); | |
1da177e4 | 243 | |
29b71a1c TR |
244 | if (dev->flags.hardware_id || dev->flags.compatible_ids) |
245 | device_remove_file(&dev->dev, &dev_attr_modalias); | |
246 | ||
e49bd2dd ZR |
247 | if(dev->flags.hardware_id) |
248 | device_remove_file(&dev->dev, &dev_attr_hid); | |
249 | if(dev->handle) | |
250 | device_remove_file(&dev->dev, &dev_attr_path); | |
1da177e4 | 251 | } |
1da177e4 | 252 | /* -------------------------------------------------------------------------- |
9e89dde2 | 253 | ACPI Bus operations |
1da177e4 | 254 | -------------------------------------------------------------------------- */ |
29b71a1c TR |
255 | |
256 | int acpi_match_device_ids(struct acpi_device *device, | |
257 | const struct acpi_device_id *ids) | |
258 | { | |
259 | const struct acpi_device_id *id; | |
260 | ||
261 | if (device->flags.hardware_id) { | |
262 | for (id = ids; id->id[0]; id++) { | |
263 | if (!strcmp((char*)id->id, device->pnp.hardware_id)) | |
264 | return 0; | |
265 | } | |
266 | } | |
267 | ||
268 | if (device->flags.compatible_ids) { | |
269 | struct acpi_compatible_id_list *cid_list = device->pnp.cid_list; | |
270 | int i; | |
271 | ||
272 | for (id = ids; id->id[0]; id++) { | |
273 | /* compare multiple _CID entries against driver ids */ | |
274 | for (i = 0; i < cid_list->count; i++) { | |
275 | if (!strcmp((char*)id->id, | |
276 | cid_list->id[i].value)) | |
277 | return 0; | |
278 | } | |
279 | } | |
280 | } | |
281 | ||
282 | return -ENOENT; | |
283 | } | |
284 | EXPORT_SYMBOL(acpi_match_device_ids); | |
285 | ||
1890a97a | 286 | static void acpi_device_release(struct device *dev) |
1da177e4 | 287 | { |
1890a97a | 288 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 289 | |
1890a97a PM |
290 | kfree(acpi_dev->pnp.cid_list); |
291 | kfree(acpi_dev); | |
1da177e4 LT |
292 | } |
293 | ||
5d9464a4 | 294 | static int acpi_device_suspend(struct device *dev, pm_message_t state) |
1da177e4 | 295 | { |
5d9464a4 PM |
296 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
297 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
1da177e4 | 298 | |
5d9464a4 PM |
299 | if (acpi_drv && acpi_drv->ops.suspend) |
300 | return acpi_drv->ops.suspend(acpi_dev, state); | |
1da177e4 LT |
301 | return 0; |
302 | } | |
1da177e4 | 303 | |
5d9464a4 | 304 | static int acpi_device_resume(struct device *dev) |
9e89dde2 | 305 | { |
5d9464a4 PM |
306 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
307 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
1da177e4 | 308 | |
5d9464a4 PM |
309 | if (acpi_drv && acpi_drv->ops.resume) |
310 | return acpi_drv->ops.resume(acpi_dev); | |
d550d98d | 311 | return 0; |
1da177e4 LT |
312 | } |
313 | ||
5d9464a4 | 314 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 315 | { |
5d9464a4 PM |
316 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
317 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
1da177e4 | 318 | |
29b71a1c | 319 | return !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
5d9464a4 | 320 | } |
1da177e4 | 321 | |
7eff2e7a | 322 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 | 323 | { |
5d9464a4 | 324 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
7eff2e7a | 325 | int len; |
5d9464a4 | 326 | |
7eff2e7a KS |
327 | if (add_uevent_var(env, "MODALIAS=")) |
328 | return -ENOMEM; | |
329 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], | |
330 | sizeof(env->buf) - env->buflen); | |
331 | if (len >= (sizeof(env->buf) - env->buflen)) | |
332 | return -ENOMEM; | |
333 | env->buflen += len; | |
9e89dde2 | 334 | return 0; |
1da177e4 LT |
335 | } |
336 | ||
5d9464a4 PM |
337 | static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *); |
338 | static int acpi_start_single_object(struct acpi_device *); | |
339 | static int acpi_device_probe(struct device * dev) | |
1da177e4 | 340 | { |
5d9464a4 PM |
341 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
342 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
343 | int ret; | |
344 | ||
345 | ret = acpi_bus_driver_init(acpi_dev, acpi_drv); | |
346 | if (!ret) { | |
c4168bff LS |
347 | if (acpi_dev->bus_ops.acpi_op_start) |
348 | acpi_start_single_object(acpi_dev); | |
5d9464a4 PM |
349 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
350 | "Found driver [%s] for device [%s]\n", | |
351 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
352 | get_device(dev); | |
353 | } | |
354 | return ret; | |
355 | } | |
1da177e4 | 356 | |
5d9464a4 PM |
357 | static int acpi_device_remove(struct device * dev) |
358 | { | |
359 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
360 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
361 | ||
362 | if (acpi_drv) { | |
363 | if (acpi_drv->ops.stop) | |
96333578 | 364 | acpi_drv->ops.stop(acpi_dev, acpi_dev->removal_type); |
5d9464a4 | 365 | if (acpi_drv->ops.remove) |
96333578 | 366 | acpi_drv->ops.remove(acpi_dev, acpi_dev->removal_type); |
1da177e4 | 367 | } |
5d9464a4 PM |
368 | acpi_dev->driver = NULL; |
369 | acpi_driver_data(dev) = NULL; | |
1da177e4 | 370 | |
5d9464a4 | 371 | put_device(dev); |
9e89dde2 ZR |
372 | return 0; |
373 | } | |
1da177e4 | 374 | |
5d9464a4 | 375 | static void acpi_device_shutdown(struct device *dev) |
1da177e4 | 376 | { |
5d9464a4 PM |
377 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
378 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
1da177e4 | 379 | |
5d9464a4 PM |
380 | if (acpi_drv && acpi_drv->ops.shutdown) |
381 | acpi_drv->ops.shutdown(acpi_dev); | |
1da177e4 | 382 | |
5d9464a4 | 383 | return ; |
1da177e4 LT |
384 | } |
385 | ||
55955aad | 386 | struct bus_type acpi_bus_type = { |
9e89dde2 ZR |
387 | .name = "acpi", |
388 | .suspend = acpi_device_suspend, | |
389 | .resume = acpi_device_resume, | |
5d9464a4 PM |
390 | .shutdown = acpi_device_shutdown, |
391 | .match = acpi_bus_match, | |
392 | .probe = acpi_device_probe, | |
393 | .remove = acpi_device_remove, | |
394 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
395 | }; |
396 | ||
e49bd2dd | 397 | static int acpi_device_register(struct acpi_device *device, |
9e89dde2 | 398 | struct acpi_device *parent) |
1da177e4 | 399 | { |
4be44fcd | 400 | int result; |
e49bd2dd ZR |
401 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
402 | int found = 0; | |
9e89dde2 ZR |
403 | /* |
404 | * Linkage | |
405 | * ------- | |
406 | * Link this device to its parent and siblings. | |
407 | */ | |
408 | INIT_LIST_HEAD(&device->children); | |
409 | INIT_LIST_HEAD(&device->node); | |
410 | INIT_LIST_HEAD(&device->g_list); | |
411 | INIT_LIST_HEAD(&device->wakeup_list); | |
1da177e4 | 412 | |
e49bd2dd ZR |
413 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
414 | if (!new_bus_id) { | |
415 | printk(KERN_ERR PREFIX "Memory allocation error\n"); | |
416 | return -ENOMEM; | |
1da177e4 | 417 | } |
e49bd2dd | 418 | |
9e89dde2 | 419 | spin_lock(&acpi_device_lock); |
e49bd2dd ZR |
420 | /* |
421 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
422 | * If failed, create one and link it into acpi_bus_id_list | |
423 | */ | |
424 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
bb095854 | 425 | if(!strcmp(acpi_device_bus_id->bus_id, device->flags.hardware_id? device->pnp.hardware_id : "device")) { |
e49bd2dd ZR |
426 | acpi_device_bus_id->instance_no ++; |
427 | found = 1; | |
428 | kfree(new_bus_id); | |
429 | break; | |
430 | } | |
1da177e4 | 431 | } |
e49bd2dd ZR |
432 | if(!found) { |
433 | acpi_device_bus_id = new_bus_id; | |
bb095854 | 434 | strcpy(acpi_device_bus_id->bus_id, device->flags.hardware_id ? device->pnp.hardware_id : "device"); |
e49bd2dd ZR |
435 | acpi_device_bus_id->instance_no = 0; |
436 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 437 | } |
e49bd2dd | 438 | sprintf(device->dev.bus_id, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 439 | |
9e89dde2 ZR |
440 | if (device->parent) { |
441 | list_add_tail(&device->node, &device->parent->children); | |
442 | list_add_tail(&device->g_list, &device->parent->g_list); | |
443 | } else | |
444 | list_add_tail(&device->g_list, &acpi_device_list); | |
445 | if (device->wakeup.flags.valid) | |
446 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
447 | spin_unlock(&acpi_device_lock); | |
1da177e4 | 448 | |
1890a97a PM |
449 | if (device->parent) |
450 | device->dev.parent = &parent->dev; | |
451 | device->dev.bus = &acpi_bus_type; | |
452 | device_initialize(&device->dev); | |
1890a97a | 453 | device->dev.release = &acpi_device_release; |
e49bd2dd ZR |
454 | result = device_add(&device->dev); |
455 | if(result) { | |
87ecd5cd | 456 | printk(KERN_ERR PREFIX "Error adding device %s", device->dev.bus_id); |
e49bd2dd | 457 | goto end; |
1da177e4 | 458 | } |
1da177e4 | 459 | |
e49bd2dd ZR |
460 | result = acpi_device_setup_files(device); |
461 | if(result) | |
462 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error creating sysfs interface for device %s\n", device->dev.bus_id)); | |
1da177e4 | 463 | |
96333578 | 464 | device->removal_type = ACPI_BUS_REMOVAL_NORMAL; |
1da177e4 | 465 | return 0; |
e49bd2dd ZR |
466 | end: |
467 | spin_lock(&acpi_device_lock); | |
468 | if (device->parent) { | |
469 | list_del(&device->node); | |
470 | list_del(&device->g_list); | |
471 | } else | |
472 | list_del(&device->g_list); | |
473 | list_del(&device->wakeup_list); | |
474 | spin_unlock(&acpi_device_lock); | |
475 | return result; | |
1da177e4 LT |
476 | } |
477 | ||
9e89dde2 ZR |
478 | static void acpi_device_unregister(struct acpi_device *device, int type) |
479 | { | |
480 | spin_lock(&acpi_device_lock); | |
481 | if (device->parent) { | |
482 | list_del(&device->node); | |
483 | list_del(&device->g_list); | |
484 | } else | |
485 | list_del(&device->g_list); | |
1da177e4 | 486 | |
9e89dde2 | 487 | list_del(&device->wakeup_list); |
9e89dde2 | 488 | spin_unlock(&acpi_device_lock); |
1da177e4 | 489 | |
9e89dde2 | 490 | acpi_detach_data(device->handle, acpi_bus_data_handler); |
1890a97a | 491 | |
f883d9db | 492 | acpi_device_remove_files(device); |
1890a97a | 493 | device_unregister(&device->dev); |
1da177e4 LT |
494 | } |
495 | ||
9e89dde2 ZR |
496 | /* -------------------------------------------------------------------------- |
497 | Driver Management | |
498 | -------------------------------------------------------------------------- */ | |
1da177e4 | 499 | /** |
d758a8fa RD |
500 | * acpi_bus_driver_init - add a device to a driver |
501 | * @device: the device to add and initialize | |
502 | * @driver: driver for the device | |
503 | * | |
1da177e4 | 504 | * Used to initialize a device via its device driver. Called whenever a |
1890a97a | 505 | * driver is bound to a device. Invokes the driver's add() ops. |
1da177e4 LT |
506 | */ |
507 | static int | |
4be44fcd | 508 | acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) |
1da177e4 | 509 | { |
4be44fcd | 510 | int result = 0; |
1da177e4 | 511 | |
1da177e4 LT |
512 | |
513 | if (!device || !driver) | |
d550d98d | 514 | return -EINVAL; |
1da177e4 LT |
515 | |
516 | if (!driver->ops.add) | |
d550d98d | 517 | return -ENOSYS; |
1da177e4 LT |
518 | |
519 | result = driver->ops.add(device); | |
520 | if (result) { | |
521 | device->driver = NULL; | |
522 | acpi_driver_data(device) = NULL; | |
d550d98d | 523 | return result; |
1da177e4 LT |
524 | } |
525 | ||
526 | device->driver = driver; | |
527 | ||
528 | /* | |
529 | * TBD - Configuration Management: Assign resources to device based | |
530 | * upon possible configuration and currently allocated resources. | |
531 | */ | |
532 | ||
4be44fcd LB |
533 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
534 | "Driver successfully bound to device\n")); | |
d550d98d | 535 | return 0; |
3fb02738 RS |
536 | } |
537 | ||
8713cbef | 538 | static int acpi_start_single_object(struct acpi_device *device) |
3fb02738 RS |
539 | { |
540 | int result = 0; | |
541 | struct acpi_driver *driver; | |
542 | ||
3fb02738 RS |
543 | |
544 | if (!(driver = device->driver)) | |
d550d98d | 545 | return 0; |
3fb02738 | 546 | |
1da177e4 LT |
547 | if (driver->ops.start) { |
548 | result = driver->ops.start(device); | |
549 | if (result && driver->ops.remove) | |
550 | driver->ops.remove(device, ACPI_BUS_REMOVAL_NORMAL); | |
1da177e4 LT |
551 | } |
552 | ||
d550d98d | 553 | return result; |
1da177e4 LT |
554 | } |
555 | ||
9e89dde2 ZR |
556 | /** |
557 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
558 | * @driver: driver being registered | |
559 | * | |
560 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
561 | * devices that match the driver's criteria and binds. Returns zero for | |
562 | * success or a negative error status for failure. | |
563 | */ | |
564 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
1da177e4 | 565 | { |
1890a97a | 566 | int ret; |
1da177e4 | 567 | |
9e89dde2 ZR |
568 | if (acpi_disabled) |
569 | return -ENODEV; | |
1890a97a PM |
570 | driver->drv.name = driver->name; |
571 | driver->drv.bus = &acpi_bus_type; | |
572 | driver->drv.owner = driver->owner; | |
1da177e4 | 573 | |
1890a97a PM |
574 | ret = driver_register(&driver->drv); |
575 | return ret; | |
9e89dde2 | 576 | } |
1da177e4 | 577 | |
9e89dde2 ZR |
578 | EXPORT_SYMBOL(acpi_bus_register_driver); |
579 | ||
580 | /** | |
581 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus | |
582 | * @driver: driver to unregister | |
583 | * | |
584 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
585 | * devices that match the driver's criteria and unbinds. | |
586 | */ | |
587 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
588 | { | |
1890a97a | 589 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
590 | } |
591 | ||
592 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
593 | ||
9e89dde2 ZR |
594 | /* -------------------------------------------------------------------------- |
595 | Device Enumeration | |
596 | -------------------------------------------------------------------------- */ | |
597 | acpi_status | |
598 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
599 | { | |
600 | acpi_status status; | |
601 | acpi_handle tmp; | |
602 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
603 | union acpi_object *obj; | |
604 | ||
605 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
606 | if (ACPI_FAILURE(status)) | |
607 | return status; | |
608 | ||
609 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
610 | if (ACPI_SUCCESS(status)) { | |
611 | obj = buffer.pointer; | |
612 | status = acpi_get_handle(NULL, obj->string.pointer, ejd); | |
613 | kfree(buffer.pointer); | |
614 | } | |
615 | return status; | |
616 | } | |
617 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
618 | ||
619 | void acpi_bus_data_handler(acpi_handle handle, u32 function, void *context) | |
620 | { | |
621 | ||
622 | /* TBD */ | |
623 | ||
624 | return; | |
625 | } | |
626 | ||
9e89dde2 ZR |
627 | static int acpi_bus_get_perf_flags(struct acpi_device *device) |
628 | { | |
629 | device->performance.state = ACPI_STATE_UNKNOWN; | |
630 | return 0; | |
631 | } | |
632 | ||
633 | static acpi_status | |
634 | acpi_bus_extract_wakeup_device_power_package(struct acpi_device *device, | |
635 | union acpi_object *package) | |
636 | { | |
637 | int i = 0; | |
638 | union acpi_object *element = NULL; | |
639 | ||
640 | if (!device || !package || (package->package.count < 2)) | |
641 | return AE_BAD_PARAMETER; | |
642 | ||
643 | element = &(package->package.elements[0]); | |
644 | if (!element) | |
645 | return AE_BAD_PARAMETER; | |
646 | if (element->type == ACPI_TYPE_PACKAGE) { | |
647 | if ((element->package.count < 2) || | |
648 | (element->package.elements[0].type != | |
649 | ACPI_TYPE_LOCAL_REFERENCE) | |
650 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) | |
651 | return AE_BAD_DATA; | |
652 | device->wakeup.gpe_device = | |
653 | element->package.elements[0].reference.handle; | |
654 | device->wakeup.gpe_number = | |
655 | (u32) element->package.elements[1].integer.value; | |
656 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
657 | device->wakeup.gpe_number = element->integer.value; | |
658 | } else | |
659 | return AE_BAD_DATA; | |
660 | ||
661 | element = &(package->package.elements[1]); | |
662 | if (element->type != ACPI_TYPE_INTEGER) { | |
663 | return AE_BAD_DATA; | |
664 | } | |
665 | device->wakeup.sleep_state = element->integer.value; | |
666 | ||
667 | if ((package->package.count - 2) > ACPI_MAX_HANDLES) { | |
668 | return AE_NO_MEMORY; | |
669 | } | |
670 | device->wakeup.resources.count = package->package.count - 2; | |
671 | for (i = 0; i < device->wakeup.resources.count; i++) { | |
672 | element = &(package->package.elements[i + 2]); | |
673 | if (element->type != ACPI_TYPE_ANY) { | |
674 | return AE_BAD_DATA; | |
1da177e4 | 675 | } |
9e89dde2 ZR |
676 | |
677 | device->wakeup.resources.handles[i] = element->reference.handle; | |
1da177e4 | 678 | } |
9e89dde2 ZR |
679 | |
680 | return AE_OK; | |
1da177e4 LT |
681 | } |
682 | ||
9e89dde2 | 683 | static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
1da177e4 | 684 | { |
9e89dde2 ZR |
685 | acpi_status status = 0; |
686 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
687 | union acpi_object *package = NULL; | |
1da177e4 | 688 | |
29b71a1c TR |
689 | struct acpi_device_id button_device_ids[] = { |
690 | {"PNP0C0D", 0}, | |
691 | {"PNP0C0C", 0}, | |
692 | {"PNP0C0E", 0}, | |
693 | {"", 0}, | |
694 | }; | |
695 | ||
1da177e4 | 696 | |
9e89dde2 ZR |
697 | /* _PRW */ |
698 | status = acpi_evaluate_object(device->handle, "_PRW", NULL, &buffer); | |
699 | if (ACPI_FAILURE(status)) { | |
700 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
701 | goto end; | |
1da177e4 | 702 | } |
1da177e4 | 703 | |
9e89dde2 ZR |
704 | package = (union acpi_object *)buffer.pointer; |
705 | status = acpi_bus_extract_wakeup_device_power_package(device, package); | |
706 | if (ACPI_FAILURE(status)) { | |
707 | ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package")); | |
708 | goto end; | |
709 | } | |
1da177e4 | 710 | |
9e89dde2 | 711 | kfree(buffer.pointer); |
1da177e4 | 712 | |
9e89dde2 ZR |
713 | device->wakeup.flags.valid = 1; |
714 | /* Power button, Lid switch always enable wakeup */ | |
29b71a1c | 715 | if (!acpi_match_device_ids(device, button_device_ids)) |
9e89dde2 | 716 | device->wakeup.flags.run_wake = 1; |
1da177e4 | 717 | |
9e89dde2 ZR |
718 | end: |
719 | if (ACPI_FAILURE(status)) | |
720 | device->flags.wake_capable = 0; | |
d550d98d | 721 | return 0; |
1da177e4 | 722 | } |
1da177e4 | 723 | |
9e89dde2 | 724 | static int acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 725 | { |
9e89dde2 ZR |
726 | acpi_status status = 0; |
727 | acpi_handle handle = NULL; | |
728 | u32 i = 0; | |
1a365616 | 729 | |
4be44fcd | 730 | |
9e89dde2 ZR |
731 | /* |
732 | * Power Management Flags | |
733 | */ | |
734 | status = acpi_get_handle(device->handle, "_PSC", &handle); | |
735 | if (ACPI_SUCCESS(status)) | |
736 | device->power.flags.explicit_get = 1; | |
737 | status = acpi_get_handle(device->handle, "_IRC", &handle); | |
738 | if (ACPI_SUCCESS(status)) | |
739 | device->power.flags.inrush_current = 1; | |
1da177e4 | 740 | |
9e89dde2 ZR |
741 | /* |
742 | * Enumerate supported power management states | |
743 | */ | |
744 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3; i++) { | |
745 | struct acpi_device_power_state *ps = &device->power.states[i]; | |
746 | char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' }; | |
1da177e4 | 747 | |
9e89dde2 ZR |
748 | /* Evaluate "_PRx" to se if power resources are referenced */ |
749 | acpi_evaluate_reference(device->handle, object_name, NULL, | |
750 | &ps->resources); | |
751 | if (ps->resources.count) { | |
752 | device->power.flags.power_resources = 1; | |
753 | ps->flags.valid = 1; | |
1da177e4 | 754 | } |
1da177e4 | 755 | |
9e89dde2 ZR |
756 | /* Evaluate "_PSx" to see if we can do explicit sets */ |
757 | object_name[2] = 'S'; | |
758 | status = acpi_get_handle(device->handle, object_name, &handle); | |
759 | if (ACPI_SUCCESS(status)) { | |
760 | ps->flags.explicit_set = 1; | |
761 | ps->flags.valid = 1; | |
1da177e4 | 762 | } |
1da177e4 | 763 | |
9e89dde2 ZR |
764 | /* State is valid if we have some power control */ |
765 | if (ps->resources.count || ps->flags.explicit_set) | |
766 | ps->flags.valid = 1; | |
1da177e4 | 767 | |
9e89dde2 ZR |
768 | ps->power = -1; /* Unknown - driver assigned */ |
769 | ps->latency = -1; /* Unknown - driver assigned */ | |
770 | } | |
1da177e4 | 771 | |
9e89dde2 ZR |
772 | /* Set defaults for D0 and D3 states (always valid) */ |
773 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
774 | device->power.states[ACPI_STATE_D0].power = 100; | |
775 | device->power.states[ACPI_STATE_D3].flags.valid = 1; | |
776 | device->power.states[ACPI_STATE_D3].power = 0; | |
c8f7a62c | 777 | |
9e89dde2 | 778 | /* TBD: System wake support and resource requirements. */ |
c8f7a62c | 779 | |
9e89dde2 | 780 | device->power.state = ACPI_STATE_UNKNOWN; |
c8f7a62c | 781 | |
9e89dde2 ZR |
782 | return 0; |
783 | } | |
c8f7a62c | 784 | |
4be44fcd | 785 | static int acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 786 | { |
4be44fcd LB |
787 | acpi_status status = AE_OK; |
788 | acpi_handle temp = NULL; | |
1da177e4 | 789 | |
1da177e4 LT |
790 | |
791 | /* Presence of _STA indicates 'dynamic_status' */ | |
792 | status = acpi_get_handle(device->handle, "_STA", &temp); | |
793 | if (ACPI_SUCCESS(status)) | |
794 | device->flags.dynamic_status = 1; | |
795 | ||
796 | /* Presence of _CID indicates 'compatible_ids' */ | |
797 | status = acpi_get_handle(device->handle, "_CID", &temp); | |
798 | if (ACPI_SUCCESS(status)) | |
799 | device->flags.compatible_ids = 1; | |
800 | ||
801 | /* Presence of _RMV indicates 'removable' */ | |
802 | status = acpi_get_handle(device->handle, "_RMV", &temp); | |
803 | if (ACPI_SUCCESS(status)) | |
804 | device->flags.removable = 1; | |
805 | ||
806 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
807 | status = acpi_get_handle(device->handle, "_EJD", &temp); | |
808 | if (ACPI_SUCCESS(status)) | |
809 | device->flags.ejectable = 1; | |
810 | else { | |
811 | status = acpi_get_handle(device->handle, "_EJ0", &temp); | |
812 | if (ACPI_SUCCESS(status)) | |
813 | device->flags.ejectable = 1; | |
814 | } | |
815 | ||
816 | /* Presence of _LCK indicates 'lockable' */ | |
817 | status = acpi_get_handle(device->handle, "_LCK", &temp); | |
818 | if (ACPI_SUCCESS(status)) | |
819 | device->flags.lockable = 1; | |
820 | ||
821 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ | |
822 | status = acpi_get_handle(device->handle, "_PS0", &temp); | |
823 | if (ACPI_FAILURE(status)) | |
824 | status = acpi_get_handle(device->handle, "_PR0", &temp); | |
825 | if (ACPI_SUCCESS(status)) | |
826 | device->flags.power_manageable = 1; | |
827 | ||
828 | /* Presence of _PRW indicates wake capable */ | |
829 | status = acpi_get_handle(device->handle, "_PRW", &temp); | |
830 | if (ACPI_SUCCESS(status)) | |
831 | device->flags.wake_capable = 1; | |
832 | ||
3c5f9be4 | 833 | /* TBD: Performance management */ |
1da177e4 | 834 | |
d550d98d | 835 | return 0; |
1da177e4 LT |
836 | } |
837 | ||
4be44fcd LB |
838 | static void acpi_device_get_busid(struct acpi_device *device, |
839 | acpi_handle handle, int type) | |
1da177e4 | 840 | { |
4be44fcd LB |
841 | char bus_id[5] = { '?', 0 }; |
842 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
843 | int i = 0; | |
1da177e4 LT |
844 | |
845 | /* | |
846 | * Bus ID | |
847 | * ------ | |
848 | * The device's Bus ID is simply the object name. | |
849 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
850 | */ | |
851 | switch (type) { | |
852 | case ACPI_BUS_TYPE_SYSTEM: | |
853 | strcpy(device->pnp.bus_id, "ACPI"); | |
854 | break; | |
855 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
856 | strcpy(device->pnp.bus_id, "PWRF"); | |
857 | break; | |
858 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
859 | strcpy(device->pnp.bus_id, "SLPF"); | |
860 | break; | |
861 | default: | |
862 | acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer); | |
863 | /* Clean up trailing underscores (if any) */ | |
864 | for (i = 3; i > 1; i--) { | |
865 | if (bus_id[i] == '_') | |
866 | bus_id[i] = '\0'; | |
867 | else | |
868 | break; | |
869 | } | |
870 | strcpy(device->pnp.bus_id, bus_id); | |
871 | break; | |
872 | } | |
873 | } | |
874 | ||
ae843332 ZR |
875 | static int |
876 | acpi_video_bus_match(struct acpi_device *device) | |
877 | { | |
878 | acpi_handle h_dummy1; | |
879 | acpi_handle h_dummy2; | |
880 | acpi_handle h_dummy3; | |
881 | ||
882 | ||
883 | if (!device) | |
884 | return -EINVAL; | |
885 | ||
886 | /* Since there is no HID, CID for ACPI Video drivers, we have | |
887 | * to check well known required nodes for each feature we support. | |
888 | */ | |
889 | ||
890 | /* Does this device able to support video switching ? */ | |
891 | if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOD", &h_dummy1)) && | |
892 | ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOS", &h_dummy2))) | |
893 | return 0; | |
894 | ||
895 | /* Does this device able to retrieve a video ROM ? */ | |
896 | if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_ROM", &h_dummy1))) | |
897 | return 0; | |
898 | ||
899 | /* Does this device able to configure which video head to be POSTed ? */ | |
900 | if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_VPO", &h_dummy1)) && | |
901 | ACPI_SUCCESS(acpi_get_handle(device->handle, "_GPD", &h_dummy2)) && | |
902 | ACPI_SUCCESS(acpi_get_handle(device->handle, "_SPD", &h_dummy3))) | |
903 | return 0; | |
904 | ||
905 | return -ENODEV; | |
906 | } | |
907 | ||
54735266 ZR |
908 | /* |
909 | * acpi_bay_match - see if a device is an ejectable driver bay | |
910 | * | |
911 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
912 | * then we can safely call it an ejectable drive bay | |
913 | */ | |
914 | static int acpi_bay_match(struct acpi_device *device){ | |
915 | acpi_status status; | |
916 | acpi_handle handle; | |
917 | acpi_handle tmp; | |
918 | acpi_handle phandle; | |
919 | ||
920 | handle = device->handle; | |
921 | ||
922 | status = acpi_get_handle(handle, "_EJ0", &tmp); | |
923 | if (ACPI_FAILURE(status)) | |
924 | return -ENODEV; | |
925 | ||
926 | if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || | |
927 | (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || | |
928 | (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || | |
929 | (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) | |
930 | return 0; | |
931 | ||
932 | if (acpi_get_parent(handle, &phandle)) | |
933 | return -ENODEV; | |
934 | ||
935 | if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) || | |
936 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) || | |
937 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) || | |
938 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp)))) | |
939 | return 0; | |
940 | ||
941 | return -ENODEV; | |
942 | } | |
943 | ||
3620f2f2 FS |
944 | /* |
945 | * acpi_dock_match - see if a device has a _DCK method | |
946 | */ | |
947 | static int acpi_dock_match(struct acpi_device *device) | |
948 | { | |
949 | acpi_handle tmp; | |
950 | return acpi_get_handle(device->handle, "_DCK", &tmp); | |
951 | } | |
952 | ||
4be44fcd LB |
953 | static void acpi_device_set_id(struct acpi_device *device, |
954 | struct acpi_device *parent, acpi_handle handle, | |
955 | int type) | |
1da177e4 | 956 | { |
4be44fcd LB |
957 | struct acpi_device_info *info; |
958 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
959 | char *hid = NULL; | |
960 | char *uid = NULL; | |
1da177e4 | 961 | struct acpi_compatible_id_list *cid_list = NULL; |
3620f2f2 | 962 | const char *cid_add = NULL; |
4be44fcd | 963 | acpi_status status; |
1da177e4 LT |
964 | |
965 | switch (type) { | |
966 | case ACPI_BUS_TYPE_DEVICE: | |
967 | status = acpi_get_object_info(handle, &buffer); | |
968 | if (ACPI_FAILURE(status)) { | |
87ecd5cd | 969 | printk(KERN_ERR PREFIX "%s: Error reading device info\n", __FUNCTION__); |
1da177e4 LT |
970 | return; |
971 | } | |
972 | ||
973 | info = buffer.pointer; | |
974 | if (info->valid & ACPI_VALID_HID) | |
975 | hid = info->hardware_id.value; | |
976 | if (info->valid & ACPI_VALID_UID) | |
977 | uid = info->unique_id.value; | |
978 | if (info->valid & ACPI_VALID_CID) | |
979 | cid_list = &info->compatibility_id; | |
980 | if (info->valid & ACPI_VALID_ADR) { | |
981 | device->pnp.bus_address = info->address; | |
982 | device->flags.bus_address = 1; | |
983 | } | |
ae843332 | 984 | |
3620f2f2 FS |
985 | /* If we have a video/bay/dock device, add our selfdefined |
986 | HID to the CID list. Like that the video/bay/dock drivers | |
987 | will get autoloaded and the device might still match | |
988 | against another driver. | |
989 | */ | |
990 | if (ACPI_SUCCESS(acpi_video_bus_match(device))) | |
991 | cid_add = ACPI_VIDEO_HID; | |
992 | else if (ACPI_SUCCESS(acpi_bay_match(device))) | |
993 | cid_add = ACPI_BAY_HID; | |
994 | else if (ACPI_SUCCESS(acpi_dock_match(device))) | |
995 | cid_add = ACPI_DOCK_HID; | |
54735266 | 996 | |
1da177e4 LT |
997 | break; |
998 | case ACPI_BUS_TYPE_POWER: | |
999 | hid = ACPI_POWER_HID; | |
1000 | break; | |
1001 | case ACPI_BUS_TYPE_PROCESSOR: | |
1002 | hid = ACPI_PROCESSOR_HID; | |
1003 | break; | |
1004 | case ACPI_BUS_TYPE_SYSTEM: | |
1005 | hid = ACPI_SYSTEM_HID; | |
1006 | break; | |
1007 | case ACPI_BUS_TYPE_THERMAL: | |
1008 | hid = ACPI_THERMAL_HID; | |
1009 | break; | |
1010 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
1011 | hid = ACPI_BUTTON_HID_POWERF; | |
1012 | break; | |
1013 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
1014 | hid = ACPI_BUTTON_HID_SLEEPF; | |
1015 | break; | |
1016 | } | |
1017 | ||
1018 | /* | |
1019 | * \_SB | |
1020 | * ---- | |
1021 | * Fix for the system root bus device -- the only root-level device. | |
1022 | */ | |
c51a4de8 | 1023 | if (((acpi_handle)parent == ACPI_ROOT_OBJECT) && (type == ACPI_BUS_TYPE_DEVICE)) { |
1da177e4 LT |
1024 | hid = ACPI_BUS_HID; |
1025 | strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME); | |
1026 | strcpy(device->pnp.device_class, ACPI_BUS_CLASS); | |
1027 | } | |
1028 | ||
1029 | if (hid) { | |
1030 | strcpy(device->pnp.hardware_id, hid); | |
1031 | device->flags.hardware_id = 1; | |
1032 | } | |
1033 | if (uid) { | |
1034 | strcpy(device->pnp.unique_id, uid); | |
1035 | device->flags.unique_id = 1; | |
1036 | } | |
3620f2f2 FS |
1037 | if (cid_list || cid_add) { |
1038 | struct acpi_compatible_id_list *list; | |
1039 | int size = 0; | |
1040 | int count = 0; | |
1041 | ||
1042 | if (cid_list) { | |
1043 | size = cid_list->size; | |
1044 | } else if (cid_add) { | |
1045 | size = sizeof(struct acpi_compatible_id_list); | |
1046 | cid_list = ACPI_ALLOCATE_ZEROED((acpi_size) size); | |
1047 | if (!cid_list) { | |
1048 | printk(KERN_ERR "Memory allocation error\n"); | |
1049 | kfree(buffer.pointer); | |
1050 | return; | |
1051 | } else { | |
1052 | cid_list->count = 0; | |
1053 | cid_list->size = size; | |
1054 | } | |
1055 | } | |
1056 | if (cid_add) | |
1057 | size += sizeof(struct acpi_compatible_id); | |
1058 | list = kmalloc(size, GFP_KERNEL); | |
1059 | ||
1060 | if (list) { | |
1061 | if (cid_list) { | |
1062 | memcpy(list, cid_list, cid_list->size); | |
1063 | count = cid_list->count; | |
1064 | } | |
1065 | if (cid_add) { | |
1066 | strncpy(list->id[count].value, cid_add, | |
1067 | ACPI_MAX_CID_LENGTH); | |
1068 | count++; | |
1069 | device->flags.compatible_ids = 1; | |
1070 | } | |
1071 | list->size = size; | |
1072 | list->count = count; | |
1073 | device->pnp.cid_list = list; | |
1074 | } else | |
87ecd5cd | 1075 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
1da177e4 LT |
1076 | } |
1077 | ||
02438d87 | 1078 | kfree(buffer.pointer); |
1da177e4 LT |
1079 | } |
1080 | ||
4be44fcd | 1081 | static int acpi_device_set_context(struct acpi_device *device, int type) |
1da177e4 LT |
1082 | { |
1083 | acpi_status status = AE_OK; | |
1084 | int result = 0; | |
1085 | /* | |
1086 | * Context | |
1087 | * ------- | |
1088 | * Attach this 'struct acpi_device' to the ACPI object. This makes | |
1089 | * resolutions from handle->device very efficient. Note that we need | |
1090 | * to be careful with fixed-feature devices as they all attach to the | |
1091 | * root object. | |
1092 | */ | |
4be44fcd | 1093 | if (type != ACPI_BUS_TYPE_POWER_BUTTON && |
1da177e4 LT |
1094 | type != ACPI_BUS_TYPE_SLEEP_BUTTON) { |
1095 | status = acpi_attach_data(device->handle, | |
4be44fcd | 1096 | acpi_bus_data_handler, device); |
1da177e4 LT |
1097 | |
1098 | if (ACPI_FAILURE(status)) { | |
87ecd5cd | 1099 | printk(KERN_ERR PREFIX "Error attaching device data\n"); |
1da177e4 LT |
1100 | result = -ENODEV; |
1101 | } | |
1102 | } | |
1103 | return result; | |
1104 | } | |
1105 | ||
4be44fcd | 1106 | static int acpi_bus_remove(struct acpi_device *dev, int rmdevice) |
1da177e4 | 1107 | { |
1da177e4 | 1108 | if (!dev) |
d550d98d | 1109 | return -EINVAL; |
1da177e4 | 1110 | |
96333578 | 1111 | dev->removal_type = ACPI_BUS_REMOVAL_EJECT; |
1890a97a | 1112 | device_release_driver(&dev->dev); |
1da177e4 LT |
1113 | |
1114 | if (!rmdevice) | |
d550d98d | 1115 | return 0; |
1da177e4 | 1116 | |
2786f6e3 RZ |
1117 | /* |
1118 | * unbind _ADR-Based Devices when hot removal | |
1119 | */ | |
1da177e4 LT |
1120 | if (dev->flags.bus_address) { |
1121 | if ((dev->parent) && (dev->parent->ops.unbind)) | |
1122 | dev->parent->ops.unbind(dev); | |
1123 | } | |
1da177e4 LT |
1124 | acpi_device_unregister(dev, ACPI_BUS_REMOVAL_EJECT); |
1125 | ||
d550d98d | 1126 | return 0; |
1da177e4 LT |
1127 | } |
1128 | ||
3620f2f2 FS |
1129 | static int |
1130 | acpi_is_child_device(struct acpi_device *device, | |
1131 | int (*matcher)(struct acpi_device *)) | |
1132 | { | |
1133 | int result = -ENODEV; | |
1134 | ||
1135 | do { | |
1136 | if (ACPI_SUCCESS(matcher(device))) | |
1137 | return AE_OK; | |
1138 | } while ((device = device->parent)); | |
1139 | ||
1140 | return result; | |
1141 | } | |
1142 | ||
3fb02738 | 1143 | static int |
4be44fcd | 1144 | acpi_add_single_object(struct acpi_device **child, |
c4168bff LS |
1145 | struct acpi_device *parent, acpi_handle handle, int type, |
1146 | struct acpi_bus_ops *ops) | |
1da177e4 | 1147 | { |
4be44fcd LB |
1148 | int result = 0; |
1149 | struct acpi_device *device = NULL; | |
1da177e4 | 1150 | |
1da177e4 LT |
1151 | |
1152 | if (!child) | |
d550d98d | 1153 | return -EINVAL; |
1da177e4 | 1154 | |
36bcbec7 | 1155 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 1156 | if (!device) { |
6468463a | 1157 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 1158 | return -ENOMEM; |
1da177e4 | 1159 | } |
1da177e4 LT |
1160 | |
1161 | device->handle = handle; | |
1162 | device->parent = parent; | |
c4168bff LS |
1163 | device->bus_ops = *ops; /* workround for not call .start */ |
1164 | ||
1da177e4 | 1165 | |
4be44fcd | 1166 | acpi_device_get_busid(device, handle, type); |
1da177e4 LT |
1167 | |
1168 | /* | |
1169 | * Flags | |
1170 | * ----- | |
1171 | * Get prior to calling acpi_bus_get_status() so we know whether | |
1172 | * or not _STA is present. Note that we only look for object | |
1173 | * handles -- cannot evaluate objects until we know the device is | |
1174 | * present and properly initialized. | |
1175 | */ | |
1176 | result = acpi_bus_get_flags(device); | |
1177 | if (result) | |
1178 | goto end; | |
1179 | ||
1180 | /* | |
1181 | * Status | |
1182 | * ------ | |
6940faba KT |
1183 | * See if the device is present. We always assume that non-Device |
1184 | * and non-Processor objects (e.g. thermal zones, power resources, | |
1185 | * etc.) are present, functioning, etc. (at least when parent object | |
1186 | * is present). Note that _STA has a different meaning for some | |
1187 | * objects (e.g. power resources) so we need to be careful how we use | |
1188 | * it. | |
1da177e4 LT |
1189 | */ |
1190 | switch (type) { | |
6940faba | 1191 | case ACPI_BUS_TYPE_PROCESSOR: |
1da177e4 LT |
1192 | case ACPI_BUS_TYPE_DEVICE: |
1193 | result = acpi_bus_get_status(device); | |
3620f2f2 FS |
1194 | if (ACPI_FAILURE(result)) { |
1195 | result = -ENODEV; | |
1da177e4 LT |
1196 | goto end; |
1197 | } | |
3620f2f2 FS |
1198 | if (!device->status.present) { |
1199 | /* Bay and dock should be handled even if absent */ | |
1200 | if (!ACPI_SUCCESS( | |
1201 | acpi_is_child_device(device, acpi_bay_match)) && | |
1202 | !ACPI_SUCCESS( | |
1203 | acpi_is_child_device(device, acpi_dock_match))) { | |
1204 | result = -ENODEV; | |
1205 | goto end; | |
1206 | } | |
1207 | } | |
1da177e4 LT |
1208 | break; |
1209 | default: | |
0c0e8921 BH |
1210 | STRUCT_TO_INT(device->status) = |
1211 | ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | | |
1212 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; | |
1da177e4 LT |
1213 | break; |
1214 | } | |
1215 | ||
1216 | /* | |
1217 | * Initialize Device | |
1218 | * ----------------- | |
1219 | * TBD: Synch with Core's enumeration/initialization process. | |
1220 | */ | |
1221 | ||
1222 | /* | |
1223 | * Hardware ID, Unique ID, & Bus Address | |
1224 | * ------------------------------------- | |
1225 | */ | |
4be44fcd | 1226 | acpi_device_set_id(device, parent, handle, type); |
1da177e4 LT |
1227 | |
1228 | /* | |
1229 | * Power Management | |
1230 | * ---------------- | |
1231 | */ | |
1232 | if (device->flags.power_manageable) { | |
1233 | result = acpi_bus_get_power_flags(device); | |
1234 | if (result) | |
1235 | goto end; | |
1236 | } | |
1237 | ||
4be44fcd | 1238 | /* |
1da177e4 LT |
1239 | * Wakeup device management |
1240 | *----------------------- | |
1241 | */ | |
1242 | if (device->flags.wake_capable) { | |
1243 | result = acpi_bus_get_wakeup_device_flags(device); | |
1244 | if (result) | |
1245 | goto end; | |
1246 | } | |
1247 | ||
1248 | /* | |
1249 | * Performance Management | |
1250 | * ---------------------- | |
1251 | */ | |
1252 | if (device->flags.performance_manageable) { | |
1253 | result = acpi_bus_get_perf_flags(device); | |
1254 | if (result) | |
1255 | goto end; | |
1256 | } | |
1257 | ||
4be44fcd | 1258 | if ((result = acpi_device_set_context(device, type))) |
1da177e4 LT |
1259 | goto end; |
1260 | ||
e49bd2dd | 1261 | result = acpi_device_register(device, parent); |
1da177e4 LT |
1262 | |
1263 | /* | |
2786f6e3 | 1264 | * Bind _ADR-Based Devices when hot add |
1da177e4 LT |
1265 | */ |
1266 | if (device->flags.bus_address) { | |
1267 | if (device->parent && device->parent->ops.bind) | |
1268 | device->parent->ops.bind(device); | |
1269 | } | |
1270 | ||
4be44fcd | 1271 | end: |
1da177e4 LT |
1272 | if (!result) |
1273 | *child = device; | |
1274 | else { | |
6044ec88 | 1275 | kfree(device->pnp.cid_list); |
1da177e4 LT |
1276 | kfree(device); |
1277 | } | |
1278 | ||
d550d98d | 1279 | return result; |
1da177e4 | 1280 | } |
1da177e4 | 1281 | |
4be44fcd | 1282 | static int acpi_bus_scan(struct acpi_device *start, struct acpi_bus_ops *ops) |
1da177e4 | 1283 | { |
4be44fcd LB |
1284 | acpi_status status = AE_OK; |
1285 | struct acpi_device *parent = NULL; | |
1286 | struct acpi_device *child = NULL; | |
1287 | acpi_handle phandle = NULL; | |
1288 | acpi_handle chandle = NULL; | |
1289 | acpi_object_type type = 0; | |
1290 | u32 level = 1; | |
1da177e4 | 1291 | |
1da177e4 LT |
1292 | |
1293 | if (!start) | |
d550d98d | 1294 | return -EINVAL; |
1da177e4 LT |
1295 | |
1296 | parent = start; | |
1297 | phandle = start->handle; | |
4be44fcd | 1298 | |
1da177e4 LT |
1299 | /* |
1300 | * Parse through the ACPI namespace, identify all 'devices', and | |
1301 | * create a new 'struct acpi_device' for each. | |
1302 | */ | |
1303 | while ((level > 0) && parent) { | |
1304 | ||
1305 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, | |
4be44fcd | 1306 | chandle, &chandle); |
1da177e4 LT |
1307 | |
1308 | /* | |
1309 | * If this scope is exhausted then move our way back up. | |
1310 | */ | |
1311 | if (ACPI_FAILURE(status)) { | |
1312 | level--; | |
1313 | chandle = phandle; | |
1314 | acpi_get_parent(phandle, &phandle); | |
1315 | if (parent->parent) | |
1316 | parent = parent->parent; | |
1317 | continue; | |
1318 | } | |
1319 | ||
1320 | status = acpi_get_type(chandle, &type); | |
1321 | if (ACPI_FAILURE(status)) | |
1322 | continue; | |
1323 | ||
1324 | /* | |
1325 | * If this is a scope object then parse it (depth-first). | |
1326 | */ | |
1327 | if (type == ACPI_TYPE_LOCAL_SCOPE) { | |
1328 | level++; | |
1329 | phandle = chandle; | |
1330 | chandle = NULL; | |
1331 | continue; | |
1332 | } | |
1333 | ||
1334 | /* | |
1335 | * We're only interested in objects that we consider 'devices'. | |
1336 | */ | |
1337 | switch (type) { | |
1338 | case ACPI_TYPE_DEVICE: | |
1339 | type = ACPI_BUS_TYPE_DEVICE; | |
1340 | break; | |
1341 | case ACPI_TYPE_PROCESSOR: | |
1342 | type = ACPI_BUS_TYPE_PROCESSOR; | |
1343 | break; | |
1344 | case ACPI_TYPE_THERMAL: | |
1345 | type = ACPI_BUS_TYPE_THERMAL; | |
1346 | break; | |
1347 | case ACPI_TYPE_POWER: | |
1348 | type = ACPI_BUS_TYPE_POWER; | |
1349 | break; | |
1350 | default: | |
1351 | continue; | |
1352 | } | |
1353 | ||
3fb02738 RS |
1354 | if (ops->acpi_op_add) |
1355 | status = acpi_add_single_object(&child, parent, | |
c4168bff | 1356 | chandle, type, ops); |
4be44fcd | 1357 | else |
3fb02738 RS |
1358 | status = acpi_bus_get_device(chandle, &child); |
1359 | ||
4be44fcd LB |
1360 | if (ACPI_FAILURE(status)) |
1361 | continue; | |
3fb02738 | 1362 | |
c4168bff | 1363 | if (ops->acpi_op_start && !(ops->acpi_op_add)) { |
3fb02738 RS |
1364 | status = acpi_start_single_object(child); |
1365 | if (ACPI_FAILURE(status)) | |
1366 | continue; | |
1367 | } | |
1da177e4 LT |
1368 | |
1369 | /* | |
1370 | * If the device is present, enabled, and functioning then | |
1371 | * parse its scope (depth-first). Note that we need to | |
1372 | * represent absent devices to facilitate PnP notifications | |
1373 | * -- but only the subtree head (not all of its children, | |
1374 | * which will be enumerated when the parent is inserted). | |
1375 | * | |
1376 | * TBD: Need notifications and other detection mechanisms | |
4be44fcd | 1377 | * in place before we can fully implement this. |
1da177e4 LT |
1378 | */ |
1379 | if (child->status.present) { | |
1380 | status = acpi_get_next_object(ACPI_TYPE_ANY, chandle, | |
1381 | NULL, NULL); | |
1382 | if (ACPI_SUCCESS(status)) { | |
1383 | level++; | |
1384 | phandle = chandle; | |
1385 | chandle = NULL; | |
1386 | parent = child; | |
1387 | } | |
1388 | } | |
1389 | } | |
1390 | ||
d550d98d | 1391 | return 0; |
1da177e4 | 1392 | } |
1da177e4 | 1393 | |
3fb02738 | 1394 | int |
4be44fcd LB |
1395 | acpi_bus_add(struct acpi_device **child, |
1396 | struct acpi_device *parent, acpi_handle handle, int type) | |
3fb02738 RS |
1397 | { |
1398 | int result; | |
1399 | struct acpi_bus_ops ops; | |
1400 | ||
c4168bff LS |
1401 | memset(&ops, 0, sizeof(ops)); |
1402 | ops.acpi_op_add = 1; | |
3fb02738 | 1403 | |
c4168bff LS |
1404 | result = acpi_add_single_object(child, parent, handle, type, &ops); |
1405 | if (!result) | |
3fb02738 | 1406 | result = acpi_bus_scan(*child, &ops); |
c4168bff | 1407 | |
d550d98d | 1408 | return result; |
3fb02738 | 1409 | } |
4be44fcd | 1410 | |
3fb02738 RS |
1411 | EXPORT_SYMBOL(acpi_bus_add); |
1412 | ||
4be44fcd | 1413 | int acpi_bus_start(struct acpi_device *device) |
3fb02738 RS |
1414 | { |
1415 | int result; | |
1416 | struct acpi_bus_ops ops; | |
1417 | ||
3fb02738 RS |
1418 | |
1419 | if (!device) | |
d550d98d | 1420 | return -EINVAL; |
3fb02738 RS |
1421 | |
1422 | result = acpi_start_single_object(device); | |
1423 | if (!result) { | |
1424 | memset(&ops, 0, sizeof(ops)); | |
1425 | ops.acpi_op_start = 1; | |
1426 | result = acpi_bus_scan(device, &ops); | |
1427 | } | |
d550d98d | 1428 | return result; |
3fb02738 | 1429 | } |
4be44fcd | 1430 | |
3fb02738 | 1431 | EXPORT_SYMBOL(acpi_bus_start); |
1da177e4 | 1432 | |
ceaba663 | 1433 | int acpi_bus_trim(struct acpi_device *start, int rmdevice) |
1da177e4 | 1434 | { |
4be44fcd LB |
1435 | acpi_status status; |
1436 | struct acpi_device *parent, *child; | |
1437 | acpi_handle phandle, chandle; | |
1438 | acpi_object_type type; | |
1439 | u32 level = 1; | |
1440 | int err = 0; | |
1441 | ||
1442 | parent = start; | |
1da177e4 LT |
1443 | phandle = start->handle; |
1444 | child = chandle = NULL; | |
1445 | ||
1446 | while ((level > 0) && parent && (!err)) { | |
1447 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, | |
4be44fcd | 1448 | chandle, &chandle); |
1da177e4 LT |
1449 | |
1450 | /* | |
1451 | * If this scope is exhausted then move our way back up. | |
1452 | */ | |
1453 | if (ACPI_FAILURE(status)) { | |
1454 | level--; | |
1455 | chandle = phandle; | |
1456 | acpi_get_parent(phandle, &phandle); | |
1457 | child = parent; | |
1458 | parent = parent->parent; | |
1459 | ||
1460 | if (level == 0) | |
1461 | err = acpi_bus_remove(child, rmdevice); | |
1462 | else | |
1463 | err = acpi_bus_remove(child, 1); | |
1464 | ||
1465 | continue; | |
1466 | } | |
1467 | ||
1468 | status = acpi_get_type(chandle, &type); | |
1469 | if (ACPI_FAILURE(status)) { | |
1470 | continue; | |
1471 | } | |
1472 | /* | |
1473 | * If there is a device corresponding to chandle then | |
1474 | * parse it (depth-first). | |
1475 | */ | |
1476 | if (acpi_bus_get_device(chandle, &child) == 0) { | |
1477 | level++; | |
1478 | phandle = chandle; | |
1479 | chandle = NULL; | |
1480 | parent = child; | |
1481 | } | |
1482 | continue; | |
1483 | } | |
1484 | return err; | |
1485 | } | |
ceaba663 KA |
1486 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
1487 | ||
1da177e4 | 1488 | |
4be44fcd | 1489 | static int acpi_bus_scan_fixed(struct acpi_device *root) |
1da177e4 | 1490 | { |
4be44fcd LB |
1491 | int result = 0; |
1492 | struct acpi_device *device = NULL; | |
c4168bff | 1493 | struct acpi_bus_ops ops; |
1da177e4 LT |
1494 | |
1495 | if (!root) | |
d550d98d | 1496 | return -ENODEV; |
1da177e4 | 1497 | |
c4168bff LS |
1498 | memset(&ops, 0, sizeof(ops)); |
1499 | ops.acpi_op_add = 1; | |
1500 | ops.acpi_op_start = 1; | |
1501 | ||
1da177e4 LT |
1502 | /* |
1503 | * Enumerate all fixed-feature devices. | |
1504 | */ | |
cee324b1 | 1505 | if ((acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON) == 0) { |
3fb02738 | 1506 | result = acpi_add_single_object(&device, acpi_root, |
4be44fcd | 1507 | NULL, |
c4168bff LS |
1508 | ACPI_BUS_TYPE_POWER_BUTTON, |
1509 | &ops); | |
3fb02738 | 1510 | } |
1da177e4 | 1511 | |
cee324b1 | 1512 | if ((acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON) == 0) { |
3fb02738 | 1513 | result = acpi_add_single_object(&device, acpi_root, |
4be44fcd | 1514 | NULL, |
c4168bff LS |
1515 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
1516 | &ops); | |
3fb02738 | 1517 | } |
1da177e4 | 1518 | |
d550d98d | 1519 | return result; |
1da177e4 LT |
1520 | } |
1521 | ||
c04209a7 AS |
1522 | int __init acpi_boot_ec_enable(void); |
1523 | ||
1da177e4 LT |
1524 | static int __init acpi_scan_init(void) |
1525 | { | |
1526 | int result; | |
3fb02738 | 1527 | struct acpi_bus_ops ops; |
1da177e4 | 1528 | |
1da177e4 LT |
1529 | |
1530 | if (acpi_disabled) | |
d550d98d | 1531 | return 0; |
1da177e4 | 1532 | |
c4168bff LS |
1533 | memset(&ops, 0, sizeof(ops)); |
1534 | ops.acpi_op_add = 1; | |
1535 | ops.acpi_op_start = 1; | |
1da177e4 | 1536 | |
5b327265 PM |
1537 | result = bus_register(&acpi_bus_type); |
1538 | if (result) { | |
1539 | /* We don't want to quit even if we failed to add suspend/resume */ | |
1540 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
1541 | } | |
1542 | ||
1da177e4 LT |
1543 | /* |
1544 | * Create the root device in the bus's device tree | |
1545 | */ | |
3fb02738 | 1546 | result = acpi_add_single_object(&acpi_root, NULL, ACPI_ROOT_OBJECT, |
c4168bff | 1547 | ACPI_BUS_TYPE_SYSTEM, &ops); |
1da177e4 LT |
1548 | if (result) |
1549 | goto Done; | |
1550 | ||
1551 | /* | |
1552 | * Enumerate devices in the ACPI namespace. | |
1553 | */ | |
1554 | result = acpi_bus_scan_fixed(acpi_root); | |
c04209a7 AS |
1555 | |
1556 | /* EC region might be needed at bus_scan, so enable it now */ | |
1557 | acpi_boot_ec_enable(); | |
1558 | ||
c4168bff | 1559 | if (!result) |
3fb02738 | 1560 | result = acpi_bus_scan(acpi_root, &ops); |
1da177e4 LT |
1561 | |
1562 | if (result) | |
1563 | acpi_device_unregister(acpi_root, ACPI_BUS_REMOVAL_NORMAL); | |
1564 | ||
4be44fcd | 1565 | Done: |
d550d98d | 1566 | return result; |
1da177e4 LT |
1567 | } |
1568 | ||
1569 | subsys_initcall(acpi_scan_init); |