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, | |
112 | "Hot-removing device %s...\n", device->dev.bus_id)); | |
113 | ||
114 | ||
115 | if (acpi_bus_trim(device, 1)) { | |
116 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
117 | "Removing device failed\n")); | |
118 | return -1; | |
119 | } | |
1da177e4 | 120 | |
26d46867 ZR |
121 | /* power off device */ |
122 | status = acpi_evaluate_object(handle, "_PS3", NULL, NULL); | |
123 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) | |
124 | ACPI_DEBUG_PRINT((ACPI_DB_WARN, | |
125 | "Power-off device failed\n")); | |
126 | ||
127 | if (device->flags.lockable) { | |
1da177e4 LT |
128 | arg_list.count = 1; |
129 | arg_list.pointer = &arg; | |
130 | arg.type = ACPI_TYPE_INTEGER; | |
131 | arg.integer.value = 0; | |
132 | acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); | |
133 | } | |
1da177e4 | 134 | |
1da177e4 LT |
135 | arg_list.count = 1; |
136 | arg_list.pointer = &arg; | |
137 | arg.type = ACPI_TYPE_INTEGER; | |
138 | arg.integer.value = 1; | |
1da177e4 | 139 | |
1da177e4 LT |
140 | /* |
141 | * TBD: _EJD support. | |
142 | */ | |
1da177e4 | 143 | status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); |
26d46867 ZR |
144 | if (ACPI_FAILURE(status)) |
145 | return -ENODEV; | |
1da177e4 | 146 | |
26d46867 | 147 | return 0; |
1da177e4 LT |
148 | } |
149 | ||
1da177e4 | 150 | static ssize_t |
f883d9db PM |
151 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
152 | const char *buf, size_t count) | |
1da177e4 | 153 | { |
4be44fcd | 154 | int ret = count; |
4be44fcd | 155 | acpi_status status; |
4be44fcd | 156 | acpi_object_type type = 0; |
f883d9db | 157 | struct acpi_device *acpi_device = to_acpi_device(d); |
74523c90 | 158 | struct task_struct *task; |
1da177e4 | 159 | |
1da177e4 LT |
160 | if ((!count) || (buf[0] != '1')) { |
161 | return -EINVAL; | |
162 | } | |
1da177e4 | 163 | #ifndef FORCE_EJECT |
f883d9db | 164 | if (acpi_device->driver == NULL) { |
1da177e4 LT |
165 | ret = -ENODEV; |
166 | goto err; | |
167 | } | |
168 | #endif | |
f883d9db PM |
169 | status = acpi_get_type(acpi_device->handle, &type); |
170 | if (ACPI_FAILURE(status) || (!acpi_device->flags.ejectable)) { | |
1da177e4 LT |
171 | ret = -ENODEV; |
172 | goto err; | |
173 | } | |
1da177e4 | 174 | |
26d46867 | 175 | /* remove the device in another thread to fix the deadlock issue */ |
74523c90 AK |
176 | task = kthread_run(acpi_bus_hot_remove_device, |
177 | acpi_device->handle, "acpi_hot_remove_device"); | |
178 | if (IS_ERR(task)) | |
179 | ret = PTR_ERR(task); | |
180 | err: | |
1da177e4 | 181 | return ret; |
1da177e4 LT |
182 | } |
183 | ||
f883d9db | 184 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
1da177e4 | 185 | |
e49bd2dd ZR |
186 | static ssize_t |
187 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
188 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1da177e4 | 189 | |
e49bd2dd | 190 | return sprintf(buf, "%s\n", acpi_dev->pnp.hardware_id); |
1da177e4 | 191 | } |
e49bd2dd | 192 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
1da177e4 | 193 | |
e49bd2dd ZR |
194 | static ssize_t |
195 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
196 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
197 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
198 | int result; | |
1da177e4 | 199 | |
e49bd2dd ZR |
200 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
201 | if(result) | |
202 | goto end; | |
1da177e4 | 203 | |
e49bd2dd ZR |
204 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
205 | kfree(path.pointer); | |
206 | end: | |
207 | return result; | |
1da177e4 | 208 | } |
e49bd2dd | 209 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
1da177e4 | 210 | |
e49bd2dd | 211 | static int acpi_device_setup_files(struct acpi_device *dev) |
1da177e4 | 212 | { |
f883d9db PM |
213 | acpi_status status; |
214 | acpi_handle temp; | |
e49bd2dd | 215 | int result = 0; |
1da177e4 LT |
216 | |
217 | /* | |
e49bd2dd | 218 | * Devices gotten from FADT don't have a "path" attribute |
1da177e4 | 219 | */ |
e49bd2dd ZR |
220 | if(dev->handle) { |
221 | result = device_create_file(&dev->dev, &dev_attr_path); | |
222 | if(result) | |
223 | goto end; | |
1da177e4 LT |
224 | } |
225 | ||
e49bd2dd ZR |
226 | if(dev->flags.hardware_id) { |
227 | result = device_create_file(&dev->dev, &dev_attr_hid); | |
228 | if(result) | |
229 | goto end; | |
230 | } | |
1da177e4 | 231 | |
29b71a1c TR |
232 | if (dev->flags.hardware_id || dev->flags.compatible_ids){ |
233 | result = device_create_file(&dev->dev, &dev_attr_modalias); | |
234 | if(result) | |
235 | goto end; | |
236 | } | |
237 | ||
e49bd2dd ZR |
238 | /* |
239 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
240 | * hot-removal function from userland. | |
241 | */ | |
f883d9db PM |
242 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); |
243 | if (ACPI_SUCCESS(status)) | |
e49bd2dd ZR |
244 | result = device_create_file(&dev->dev, &dev_attr_eject); |
245 | end: | |
246 | return result; | |
1da177e4 LT |
247 | } |
248 | ||
f883d9db | 249 | static void acpi_device_remove_files(struct acpi_device *dev) |
1da177e4 | 250 | { |
f883d9db PM |
251 | acpi_status status; |
252 | acpi_handle temp; | |
1da177e4 | 253 | |
f883d9db PM |
254 | /* |
255 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
256 | * hot-removal function from userland. | |
257 | */ | |
258 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); | |
259 | if (ACPI_SUCCESS(status)) | |
260 | device_remove_file(&dev->dev, &dev_attr_eject); | |
1da177e4 | 261 | |
29b71a1c TR |
262 | if (dev->flags.hardware_id || dev->flags.compatible_ids) |
263 | device_remove_file(&dev->dev, &dev_attr_modalias); | |
264 | ||
e49bd2dd ZR |
265 | if(dev->flags.hardware_id) |
266 | device_remove_file(&dev->dev, &dev_attr_hid); | |
267 | if(dev->handle) | |
268 | device_remove_file(&dev->dev, &dev_attr_path); | |
1da177e4 | 269 | } |
1da177e4 | 270 | /* -------------------------------------------------------------------------- |
9e89dde2 | 271 | ACPI Bus operations |
1da177e4 | 272 | -------------------------------------------------------------------------- */ |
29b71a1c TR |
273 | |
274 | int acpi_match_device_ids(struct acpi_device *device, | |
275 | const struct acpi_device_id *ids) | |
276 | { | |
277 | const struct acpi_device_id *id; | |
278 | ||
279 | if (device->flags.hardware_id) { | |
280 | for (id = ids; id->id[0]; id++) { | |
281 | if (!strcmp((char*)id->id, device->pnp.hardware_id)) | |
282 | return 0; | |
283 | } | |
284 | } | |
285 | ||
286 | if (device->flags.compatible_ids) { | |
287 | struct acpi_compatible_id_list *cid_list = device->pnp.cid_list; | |
288 | int i; | |
289 | ||
290 | for (id = ids; id->id[0]; id++) { | |
291 | /* compare multiple _CID entries against driver ids */ | |
292 | for (i = 0; i < cid_list->count; i++) { | |
293 | if (!strcmp((char*)id->id, | |
294 | cid_list->id[i].value)) | |
295 | return 0; | |
296 | } | |
297 | } | |
298 | } | |
299 | ||
300 | return -ENOENT; | |
301 | } | |
302 | EXPORT_SYMBOL(acpi_match_device_ids); | |
303 | ||
1890a97a | 304 | static void acpi_device_release(struct device *dev) |
1da177e4 | 305 | { |
1890a97a | 306 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 307 | |
1890a97a PM |
308 | kfree(acpi_dev->pnp.cid_list); |
309 | kfree(acpi_dev); | |
1da177e4 LT |
310 | } |
311 | ||
5d9464a4 | 312 | static int acpi_device_suspend(struct device *dev, pm_message_t state) |
1da177e4 | 313 | { |
5d9464a4 PM |
314 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
315 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
1da177e4 | 316 | |
5d9464a4 PM |
317 | if (acpi_drv && acpi_drv->ops.suspend) |
318 | return acpi_drv->ops.suspend(acpi_dev, state); | |
1da177e4 LT |
319 | return 0; |
320 | } | |
1da177e4 | 321 | |
5d9464a4 | 322 | static int acpi_device_resume(struct device *dev) |
9e89dde2 | 323 | { |
5d9464a4 PM |
324 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
325 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
1da177e4 | 326 | |
5d9464a4 PM |
327 | if (acpi_drv && acpi_drv->ops.resume) |
328 | return acpi_drv->ops.resume(acpi_dev); | |
d550d98d | 329 | return 0; |
1da177e4 LT |
330 | } |
331 | ||
5d9464a4 | 332 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 333 | { |
5d9464a4 PM |
334 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
335 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
1da177e4 | 336 | |
29b71a1c | 337 | return !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
5d9464a4 | 338 | } |
1da177e4 | 339 | |
7eff2e7a | 340 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 | 341 | { |
5d9464a4 | 342 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
7eff2e7a | 343 | int len; |
5d9464a4 | 344 | |
7eff2e7a KS |
345 | if (add_uevent_var(env, "MODALIAS=")) |
346 | return -ENOMEM; | |
347 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], | |
348 | sizeof(env->buf) - env->buflen); | |
349 | if (len >= (sizeof(env->buf) - env->buflen)) | |
350 | return -ENOMEM; | |
351 | env->buflen += len; | |
9e89dde2 | 352 | return 0; |
1da177e4 LT |
353 | } |
354 | ||
5d9464a4 PM |
355 | static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *); |
356 | static int acpi_start_single_object(struct acpi_device *); | |
357 | static int acpi_device_probe(struct device * dev) | |
1da177e4 | 358 | { |
5d9464a4 PM |
359 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
360 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
361 | int ret; | |
362 | ||
363 | ret = acpi_bus_driver_init(acpi_dev, acpi_drv); | |
364 | if (!ret) { | |
c4168bff LS |
365 | if (acpi_dev->bus_ops.acpi_op_start) |
366 | acpi_start_single_object(acpi_dev); | |
5d9464a4 PM |
367 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
368 | "Found driver [%s] for device [%s]\n", | |
369 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
370 | get_device(dev); | |
371 | } | |
372 | return ret; | |
373 | } | |
1da177e4 | 374 | |
5d9464a4 PM |
375 | static int acpi_device_remove(struct device * dev) |
376 | { | |
377 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
378 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
379 | ||
380 | if (acpi_drv) { | |
381 | if (acpi_drv->ops.stop) | |
96333578 | 382 | acpi_drv->ops.stop(acpi_dev, acpi_dev->removal_type); |
5d9464a4 | 383 | if (acpi_drv->ops.remove) |
96333578 | 384 | acpi_drv->ops.remove(acpi_dev, acpi_dev->removal_type); |
1da177e4 | 385 | } |
5d9464a4 PM |
386 | acpi_dev->driver = NULL; |
387 | acpi_driver_data(dev) = NULL; | |
1da177e4 | 388 | |
5d9464a4 | 389 | put_device(dev); |
9e89dde2 ZR |
390 | return 0; |
391 | } | |
1da177e4 | 392 | |
5d9464a4 | 393 | static void acpi_device_shutdown(struct device *dev) |
1da177e4 | 394 | { |
5d9464a4 PM |
395 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
396 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
1da177e4 | 397 | |
5d9464a4 PM |
398 | if (acpi_drv && acpi_drv->ops.shutdown) |
399 | acpi_drv->ops.shutdown(acpi_dev); | |
1da177e4 | 400 | |
5d9464a4 | 401 | return ; |
1da177e4 LT |
402 | } |
403 | ||
55955aad | 404 | struct bus_type acpi_bus_type = { |
9e89dde2 ZR |
405 | .name = "acpi", |
406 | .suspend = acpi_device_suspend, | |
407 | .resume = acpi_device_resume, | |
5d9464a4 PM |
408 | .shutdown = acpi_device_shutdown, |
409 | .match = acpi_bus_match, | |
410 | .probe = acpi_device_probe, | |
411 | .remove = acpi_device_remove, | |
412 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
413 | }; |
414 | ||
e49bd2dd | 415 | static int acpi_device_register(struct acpi_device *device, |
9e89dde2 | 416 | struct acpi_device *parent) |
1da177e4 | 417 | { |
4be44fcd | 418 | int result; |
e49bd2dd ZR |
419 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
420 | int found = 0; | |
9e89dde2 ZR |
421 | /* |
422 | * Linkage | |
423 | * ------- | |
424 | * Link this device to its parent and siblings. | |
425 | */ | |
426 | INIT_LIST_HEAD(&device->children); | |
427 | INIT_LIST_HEAD(&device->node); | |
428 | INIT_LIST_HEAD(&device->g_list); | |
429 | INIT_LIST_HEAD(&device->wakeup_list); | |
1da177e4 | 430 | |
e49bd2dd ZR |
431 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
432 | if (!new_bus_id) { | |
433 | printk(KERN_ERR PREFIX "Memory allocation error\n"); | |
434 | return -ENOMEM; | |
1da177e4 | 435 | } |
e49bd2dd | 436 | |
9e89dde2 | 437 | spin_lock(&acpi_device_lock); |
e49bd2dd ZR |
438 | /* |
439 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
440 | * If failed, create one and link it into acpi_bus_id_list | |
441 | */ | |
442 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
bb095854 | 443 | if(!strcmp(acpi_device_bus_id->bus_id, device->flags.hardware_id? device->pnp.hardware_id : "device")) { |
e49bd2dd ZR |
444 | acpi_device_bus_id->instance_no ++; |
445 | found = 1; | |
446 | kfree(new_bus_id); | |
447 | break; | |
448 | } | |
1da177e4 | 449 | } |
e49bd2dd ZR |
450 | if(!found) { |
451 | acpi_device_bus_id = new_bus_id; | |
bb095854 | 452 | strcpy(acpi_device_bus_id->bus_id, device->flags.hardware_id ? device->pnp.hardware_id : "device"); |
e49bd2dd ZR |
453 | acpi_device_bus_id->instance_no = 0; |
454 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 455 | } |
e49bd2dd | 456 | sprintf(device->dev.bus_id, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 457 | |
9e89dde2 ZR |
458 | if (device->parent) { |
459 | list_add_tail(&device->node, &device->parent->children); | |
460 | list_add_tail(&device->g_list, &device->parent->g_list); | |
461 | } else | |
462 | list_add_tail(&device->g_list, &acpi_device_list); | |
463 | if (device->wakeup.flags.valid) | |
464 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
465 | spin_unlock(&acpi_device_lock); | |
1da177e4 | 466 | |
1890a97a PM |
467 | if (device->parent) |
468 | device->dev.parent = &parent->dev; | |
469 | device->dev.bus = &acpi_bus_type; | |
470 | device_initialize(&device->dev); | |
1890a97a | 471 | device->dev.release = &acpi_device_release; |
e49bd2dd ZR |
472 | result = device_add(&device->dev); |
473 | if(result) { | |
87ecd5cd | 474 | printk(KERN_ERR PREFIX "Error adding device %s", device->dev.bus_id); |
e49bd2dd | 475 | goto end; |
1da177e4 | 476 | } |
1da177e4 | 477 | |
e49bd2dd ZR |
478 | result = acpi_device_setup_files(device); |
479 | if(result) | |
480 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error creating sysfs interface for device %s\n", device->dev.bus_id)); | |
1da177e4 | 481 | |
96333578 | 482 | device->removal_type = ACPI_BUS_REMOVAL_NORMAL; |
1da177e4 | 483 | return 0; |
e49bd2dd ZR |
484 | end: |
485 | spin_lock(&acpi_device_lock); | |
486 | if (device->parent) { | |
487 | list_del(&device->node); | |
488 | list_del(&device->g_list); | |
489 | } else | |
490 | list_del(&device->g_list); | |
491 | list_del(&device->wakeup_list); | |
492 | spin_unlock(&acpi_device_lock); | |
493 | return result; | |
1da177e4 LT |
494 | } |
495 | ||
9e89dde2 ZR |
496 | static void acpi_device_unregister(struct acpi_device *device, int type) |
497 | { | |
498 | spin_lock(&acpi_device_lock); | |
499 | if (device->parent) { | |
500 | list_del(&device->node); | |
501 | list_del(&device->g_list); | |
502 | } else | |
503 | list_del(&device->g_list); | |
1da177e4 | 504 | |
9e89dde2 | 505 | list_del(&device->wakeup_list); |
9e89dde2 | 506 | spin_unlock(&acpi_device_lock); |
1da177e4 | 507 | |
9e89dde2 | 508 | acpi_detach_data(device->handle, acpi_bus_data_handler); |
1890a97a | 509 | |
f883d9db | 510 | acpi_device_remove_files(device); |
1890a97a | 511 | device_unregister(&device->dev); |
1da177e4 LT |
512 | } |
513 | ||
9e89dde2 ZR |
514 | /* -------------------------------------------------------------------------- |
515 | Driver Management | |
516 | -------------------------------------------------------------------------- */ | |
1da177e4 | 517 | /** |
d758a8fa RD |
518 | * acpi_bus_driver_init - add a device to a driver |
519 | * @device: the device to add and initialize | |
520 | * @driver: driver for the device | |
521 | * | |
1da177e4 | 522 | * Used to initialize a device via its device driver. Called whenever a |
1890a97a | 523 | * driver is bound to a device. Invokes the driver's add() ops. |
1da177e4 LT |
524 | */ |
525 | static int | |
4be44fcd | 526 | acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) |
1da177e4 | 527 | { |
4be44fcd | 528 | int result = 0; |
1da177e4 | 529 | |
1da177e4 LT |
530 | |
531 | if (!device || !driver) | |
d550d98d | 532 | return -EINVAL; |
1da177e4 LT |
533 | |
534 | if (!driver->ops.add) | |
d550d98d | 535 | return -ENOSYS; |
1da177e4 LT |
536 | |
537 | result = driver->ops.add(device); | |
538 | if (result) { | |
539 | device->driver = NULL; | |
540 | acpi_driver_data(device) = NULL; | |
d550d98d | 541 | return result; |
1da177e4 LT |
542 | } |
543 | ||
544 | device->driver = driver; | |
545 | ||
546 | /* | |
547 | * TBD - Configuration Management: Assign resources to device based | |
548 | * upon possible configuration and currently allocated resources. | |
549 | */ | |
550 | ||
4be44fcd LB |
551 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
552 | "Driver successfully bound to device\n")); | |
d550d98d | 553 | return 0; |
3fb02738 RS |
554 | } |
555 | ||
8713cbef | 556 | static int acpi_start_single_object(struct acpi_device *device) |
3fb02738 RS |
557 | { |
558 | int result = 0; | |
559 | struct acpi_driver *driver; | |
560 | ||
3fb02738 RS |
561 | |
562 | if (!(driver = device->driver)) | |
d550d98d | 563 | return 0; |
3fb02738 | 564 | |
1da177e4 LT |
565 | if (driver->ops.start) { |
566 | result = driver->ops.start(device); | |
567 | if (result && driver->ops.remove) | |
568 | driver->ops.remove(device, ACPI_BUS_REMOVAL_NORMAL); | |
1da177e4 LT |
569 | } |
570 | ||
d550d98d | 571 | return result; |
1da177e4 LT |
572 | } |
573 | ||
9e89dde2 ZR |
574 | /** |
575 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
576 | * @driver: driver being registered | |
577 | * | |
578 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
579 | * devices that match the driver's criteria and binds. Returns zero for | |
580 | * success or a negative error status for failure. | |
581 | */ | |
582 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
1da177e4 | 583 | { |
1890a97a | 584 | int ret; |
1da177e4 | 585 | |
9e89dde2 ZR |
586 | if (acpi_disabled) |
587 | return -ENODEV; | |
1890a97a PM |
588 | driver->drv.name = driver->name; |
589 | driver->drv.bus = &acpi_bus_type; | |
590 | driver->drv.owner = driver->owner; | |
1da177e4 | 591 | |
1890a97a PM |
592 | ret = driver_register(&driver->drv); |
593 | return ret; | |
9e89dde2 | 594 | } |
1da177e4 | 595 | |
9e89dde2 ZR |
596 | EXPORT_SYMBOL(acpi_bus_register_driver); |
597 | ||
598 | /** | |
599 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus | |
600 | * @driver: driver to unregister | |
601 | * | |
602 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
603 | * devices that match the driver's criteria and unbinds. | |
604 | */ | |
605 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
606 | { | |
1890a97a | 607 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
608 | } |
609 | ||
610 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
611 | ||
9e89dde2 ZR |
612 | /* -------------------------------------------------------------------------- |
613 | Device Enumeration | |
614 | -------------------------------------------------------------------------- */ | |
615 | acpi_status | |
616 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
617 | { | |
618 | acpi_status status; | |
619 | acpi_handle tmp; | |
620 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
621 | union acpi_object *obj; | |
622 | ||
623 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
624 | if (ACPI_FAILURE(status)) | |
625 | return status; | |
626 | ||
627 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
628 | if (ACPI_SUCCESS(status)) { | |
629 | obj = buffer.pointer; | |
3b5fee59 HM |
630 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
631 | ejd); | |
9e89dde2 ZR |
632 | kfree(buffer.pointer); |
633 | } | |
634 | return status; | |
635 | } | |
636 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
637 | ||
638 | void acpi_bus_data_handler(acpi_handle handle, u32 function, void *context) | |
639 | { | |
640 | ||
641 | /* TBD */ | |
642 | ||
643 | return; | |
644 | } | |
645 | ||
9e89dde2 ZR |
646 | static int acpi_bus_get_perf_flags(struct acpi_device *device) |
647 | { | |
648 | device->performance.state = ACPI_STATE_UNKNOWN; | |
649 | return 0; | |
650 | } | |
651 | ||
652 | static acpi_status | |
653 | acpi_bus_extract_wakeup_device_power_package(struct acpi_device *device, | |
654 | union acpi_object *package) | |
655 | { | |
656 | int i = 0; | |
657 | union acpi_object *element = NULL; | |
658 | ||
659 | if (!device || !package || (package->package.count < 2)) | |
660 | return AE_BAD_PARAMETER; | |
661 | ||
662 | element = &(package->package.elements[0]); | |
663 | if (!element) | |
664 | return AE_BAD_PARAMETER; | |
665 | if (element->type == ACPI_TYPE_PACKAGE) { | |
666 | if ((element->package.count < 2) || | |
667 | (element->package.elements[0].type != | |
668 | ACPI_TYPE_LOCAL_REFERENCE) | |
669 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) | |
670 | return AE_BAD_DATA; | |
671 | device->wakeup.gpe_device = | |
672 | element->package.elements[0].reference.handle; | |
673 | device->wakeup.gpe_number = | |
674 | (u32) element->package.elements[1].integer.value; | |
675 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
676 | device->wakeup.gpe_number = element->integer.value; | |
677 | } else | |
678 | return AE_BAD_DATA; | |
679 | ||
680 | element = &(package->package.elements[1]); | |
681 | if (element->type != ACPI_TYPE_INTEGER) { | |
682 | return AE_BAD_DATA; | |
683 | } | |
684 | device->wakeup.sleep_state = element->integer.value; | |
685 | ||
686 | if ((package->package.count - 2) > ACPI_MAX_HANDLES) { | |
687 | return AE_NO_MEMORY; | |
688 | } | |
689 | device->wakeup.resources.count = package->package.count - 2; | |
690 | for (i = 0; i < device->wakeup.resources.count; i++) { | |
691 | element = &(package->package.elements[i + 2]); | |
cd0b2248 | 692 | if (element->type != ACPI_TYPE_LOCAL_REFERENCE) |
9e89dde2 | 693 | return AE_BAD_DATA; |
9e89dde2 ZR |
694 | |
695 | device->wakeup.resources.handles[i] = element->reference.handle; | |
1da177e4 | 696 | } |
9e89dde2 ZR |
697 | |
698 | return AE_OK; | |
1da177e4 LT |
699 | } |
700 | ||
9e89dde2 | 701 | static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
1da177e4 | 702 | { |
9e89dde2 ZR |
703 | acpi_status status = 0; |
704 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
705 | union acpi_object *package = NULL; | |
729b2bdb ZY |
706 | union acpi_object in_arg[3]; |
707 | struct acpi_object_list arg_list = { 3, in_arg }; | |
708 | acpi_status psw_status = AE_OK; | |
1da177e4 | 709 | |
29b71a1c TR |
710 | struct acpi_device_id button_device_ids[] = { |
711 | {"PNP0C0D", 0}, | |
712 | {"PNP0C0C", 0}, | |
713 | {"PNP0C0E", 0}, | |
714 | {"", 0}, | |
715 | }; | |
716 | ||
9e89dde2 ZR |
717 | /* _PRW */ |
718 | status = acpi_evaluate_object(device->handle, "_PRW", NULL, &buffer); | |
719 | if (ACPI_FAILURE(status)) { | |
720 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
721 | goto end; | |
1da177e4 | 722 | } |
1da177e4 | 723 | |
9e89dde2 ZR |
724 | package = (union acpi_object *)buffer.pointer; |
725 | status = acpi_bus_extract_wakeup_device_power_package(device, package); | |
726 | if (ACPI_FAILURE(status)) { | |
727 | ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package")); | |
728 | goto end; | |
729 | } | |
1da177e4 | 730 | |
9e89dde2 | 731 | kfree(buffer.pointer); |
1da177e4 | 732 | |
9e89dde2 | 733 | device->wakeup.flags.valid = 1; |
729b2bdb ZY |
734 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
735 | * system for the ACPI device with the _PRW object. | |
736 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. | |
737 | * So it is necessary to call _DSW object first. Only when it is not | |
738 | * present will the _PSW object used. | |
739 | */ | |
740 | /* | |
741 | * Three agruments are needed for the _DSW object. | |
742 | * Argument 0: enable/disable the wake capabilities | |
743 | * When _DSW object is called to disable the wake capabilities, maybe | |
744 | * the first argument is filled. The value of the other two agruments | |
745 | * is meaningless. | |
746 | */ | |
747 | in_arg[0].type = ACPI_TYPE_INTEGER; | |
748 | in_arg[0].integer.value = 0; | |
749 | in_arg[1].type = ACPI_TYPE_INTEGER; | |
750 | in_arg[1].integer.value = 0; | |
751 | in_arg[2].type = ACPI_TYPE_INTEGER; | |
752 | in_arg[2].integer.value = 0; | |
753 | psw_status = acpi_evaluate_object(device->handle, "_DSW", | |
754 | &arg_list, NULL); | |
755 | if (ACPI_FAILURE(psw_status) && (psw_status != AE_NOT_FOUND)) | |
756 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "error in evaluate _DSW\n")); | |
757 | /* | |
758 | * When the _DSW object is not present, OSPM will call _PSW object. | |
759 | */ | |
760 | if (psw_status == AE_NOT_FOUND) { | |
761 | /* | |
762 | * Only one agruments is required for the _PSW object. | |
763 | * agrument 0: enable/disable the wake capabilities | |
764 | */ | |
765 | arg_list.count = 1; | |
766 | in_arg[0].integer.value = 0; | |
767 | psw_status = acpi_evaluate_object(device->handle, "_PSW", | |
768 | &arg_list, NULL); | |
769 | if (ACPI_FAILURE(psw_status) && (psw_status != AE_NOT_FOUND)) | |
770 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "error in " | |
771 | "evaluate _PSW\n")); | |
772 | } | |
9e89dde2 | 773 | /* Power button, Lid switch always enable wakeup */ |
29b71a1c | 774 | if (!acpi_match_device_ids(device, button_device_ids)) |
9e89dde2 | 775 | device->wakeup.flags.run_wake = 1; |
1da177e4 | 776 | |
9e89dde2 ZR |
777 | end: |
778 | if (ACPI_FAILURE(status)) | |
779 | device->flags.wake_capable = 0; | |
d550d98d | 780 | return 0; |
1da177e4 | 781 | } |
1da177e4 | 782 | |
9e89dde2 | 783 | static int acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 784 | { |
9e89dde2 ZR |
785 | acpi_status status = 0; |
786 | acpi_handle handle = NULL; | |
787 | u32 i = 0; | |
1a365616 | 788 | |
4be44fcd | 789 | |
9e89dde2 ZR |
790 | /* |
791 | * Power Management Flags | |
792 | */ | |
793 | status = acpi_get_handle(device->handle, "_PSC", &handle); | |
794 | if (ACPI_SUCCESS(status)) | |
795 | device->power.flags.explicit_get = 1; | |
796 | status = acpi_get_handle(device->handle, "_IRC", &handle); | |
797 | if (ACPI_SUCCESS(status)) | |
798 | device->power.flags.inrush_current = 1; | |
1da177e4 | 799 | |
9e89dde2 ZR |
800 | /* |
801 | * Enumerate supported power management states | |
802 | */ | |
803 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3; i++) { | |
804 | struct acpi_device_power_state *ps = &device->power.states[i]; | |
805 | char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' }; | |
1da177e4 | 806 | |
9e89dde2 ZR |
807 | /* Evaluate "_PRx" to se if power resources are referenced */ |
808 | acpi_evaluate_reference(device->handle, object_name, NULL, | |
809 | &ps->resources); | |
810 | if (ps->resources.count) { | |
811 | device->power.flags.power_resources = 1; | |
812 | ps->flags.valid = 1; | |
1da177e4 | 813 | } |
1da177e4 | 814 | |
9e89dde2 ZR |
815 | /* Evaluate "_PSx" to see if we can do explicit sets */ |
816 | object_name[2] = 'S'; | |
817 | status = acpi_get_handle(device->handle, object_name, &handle); | |
818 | if (ACPI_SUCCESS(status)) { | |
819 | ps->flags.explicit_set = 1; | |
820 | ps->flags.valid = 1; | |
1da177e4 | 821 | } |
1da177e4 | 822 | |
9e89dde2 ZR |
823 | /* State is valid if we have some power control */ |
824 | if (ps->resources.count || ps->flags.explicit_set) | |
825 | ps->flags.valid = 1; | |
1da177e4 | 826 | |
9e89dde2 ZR |
827 | ps->power = -1; /* Unknown - driver assigned */ |
828 | ps->latency = -1; /* Unknown - driver assigned */ | |
829 | } | |
1da177e4 | 830 | |
9e89dde2 ZR |
831 | /* Set defaults for D0 and D3 states (always valid) */ |
832 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
833 | device->power.states[ACPI_STATE_D0].power = 100; | |
834 | device->power.states[ACPI_STATE_D3].flags.valid = 1; | |
835 | device->power.states[ACPI_STATE_D3].power = 0; | |
c8f7a62c | 836 | |
9e89dde2 | 837 | /* TBD: System wake support and resource requirements. */ |
c8f7a62c | 838 | |
9e89dde2 | 839 | device->power.state = ACPI_STATE_UNKNOWN; |
c8f7a62c | 840 | |
9e89dde2 ZR |
841 | return 0; |
842 | } | |
c8f7a62c | 843 | |
4be44fcd | 844 | static int acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 845 | { |
4be44fcd LB |
846 | acpi_status status = AE_OK; |
847 | acpi_handle temp = NULL; | |
1da177e4 | 848 | |
1da177e4 LT |
849 | |
850 | /* Presence of _STA indicates 'dynamic_status' */ | |
851 | status = acpi_get_handle(device->handle, "_STA", &temp); | |
852 | if (ACPI_SUCCESS(status)) | |
853 | device->flags.dynamic_status = 1; | |
854 | ||
855 | /* Presence of _CID indicates 'compatible_ids' */ | |
856 | status = acpi_get_handle(device->handle, "_CID", &temp); | |
857 | if (ACPI_SUCCESS(status)) | |
858 | device->flags.compatible_ids = 1; | |
859 | ||
860 | /* Presence of _RMV indicates 'removable' */ | |
861 | status = acpi_get_handle(device->handle, "_RMV", &temp); | |
862 | if (ACPI_SUCCESS(status)) | |
863 | device->flags.removable = 1; | |
864 | ||
865 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
866 | status = acpi_get_handle(device->handle, "_EJD", &temp); | |
867 | if (ACPI_SUCCESS(status)) | |
868 | device->flags.ejectable = 1; | |
869 | else { | |
870 | status = acpi_get_handle(device->handle, "_EJ0", &temp); | |
871 | if (ACPI_SUCCESS(status)) | |
872 | device->flags.ejectable = 1; | |
873 | } | |
874 | ||
875 | /* Presence of _LCK indicates 'lockable' */ | |
876 | status = acpi_get_handle(device->handle, "_LCK", &temp); | |
877 | if (ACPI_SUCCESS(status)) | |
878 | device->flags.lockable = 1; | |
879 | ||
880 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ | |
881 | status = acpi_get_handle(device->handle, "_PS0", &temp); | |
882 | if (ACPI_FAILURE(status)) | |
883 | status = acpi_get_handle(device->handle, "_PR0", &temp); | |
884 | if (ACPI_SUCCESS(status)) | |
885 | device->flags.power_manageable = 1; | |
886 | ||
887 | /* Presence of _PRW indicates wake capable */ | |
888 | status = acpi_get_handle(device->handle, "_PRW", &temp); | |
889 | if (ACPI_SUCCESS(status)) | |
890 | device->flags.wake_capable = 1; | |
891 | ||
3c5f9be4 | 892 | /* TBD: Performance management */ |
1da177e4 | 893 | |
d550d98d | 894 | return 0; |
1da177e4 LT |
895 | } |
896 | ||
4be44fcd LB |
897 | static void acpi_device_get_busid(struct acpi_device *device, |
898 | acpi_handle handle, int type) | |
1da177e4 | 899 | { |
4be44fcd LB |
900 | char bus_id[5] = { '?', 0 }; |
901 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
902 | int i = 0; | |
1da177e4 LT |
903 | |
904 | /* | |
905 | * Bus ID | |
906 | * ------ | |
907 | * The device's Bus ID is simply the object name. | |
908 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
909 | */ | |
910 | switch (type) { | |
911 | case ACPI_BUS_TYPE_SYSTEM: | |
912 | strcpy(device->pnp.bus_id, "ACPI"); | |
913 | break; | |
914 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
915 | strcpy(device->pnp.bus_id, "PWRF"); | |
916 | break; | |
917 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
918 | strcpy(device->pnp.bus_id, "SLPF"); | |
919 | break; | |
920 | default: | |
921 | acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer); | |
922 | /* Clean up trailing underscores (if any) */ | |
923 | for (i = 3; i > 1; i--) { | |
924 | if (bus_id[i] == '_') | |
925 | bus_id[i] = '\0'; | |
926 | else | |
927 | break; | |
928 | } | |
929 | strcpy(device->pnp.bus_id, bus_id); | |
930 | break; | |
931 | } | |
932 | } | |
933 | ||
ae843332 ZR |
934 | static int |
935 | acpi_video_bus_match(struct acpi_device *device) | |
936 | { | |
66fb9d12 | 937 | acpi_handle h_dummy; |
ae843332 ZR |
938 | |
939 | if (!device) | |
940 | return -EINVAL; | |
941 | ||
942 | /* Since there is no HID, CID for ACPI Video drivers, we have | |
943 | * to check well known required nodes for each feature we support. | |
944 | */ | |
945 | ||
946 | /* Does this device able to support video switching ? */ | |
66fb9d12 TR |
947 | if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOD", &h_dummy)) && |
948 | ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOS", &h_dummy))) | |
ae843332 ZR |
949 | return 0; |
950 | ||
951 | /* Does this device able to retrieve a video ROM ? */ | |
66fb9d12 | 952 | if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_ROM", &h_dummy))) |
ae843332 ZR |
953 | return 0; |
954 | ||
955 | /* Does this device able to configure which video head to be POSTed ? */ | |
66fb9d12 TR |
956 | if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_VPO", &h_dummy)) && |
957 | ACPI_SUCCESS(acpi_get_handle(device->handle, "_GPD", &h_dummy)) && | |
958 | ACPI_SUCCESS(acpi_get_handle(device->handle, "_SPD", &h_dummy))) | |
ae843332 ZR |
959 | return 0; |
960 | ||
961 | return -ENODEV; | |
962 | } | |
963 | ||
54735266 ZR |
964 | /* |
965 | * acpi_bay_match - see if a device is an ejectable driver bay | |
966 | * | |
967 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
968 | * then we can safely call it an ejectable drive bay | |
969 | */ | |
970 | static int acpi_bay_match(struct acpi_device *device){ | |
971 | acpi_status status; | |
972 | acpi_handle handle; | |
973 | acpi_handle tmp; | |
974 | acpi_handle phandle; | |
975 | ||
976 | handle = device->handle; | |
977 | ||
978 | status = acpi_get_handle(handle, "_EJ0", &tmp); | |
979 | if (ACPI_FAILURE(status)) | |
980 | return -ENODEV; | |
981 | ||
982 | if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || | |
983 | (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || | |
984 | (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || | |
985 | (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) | |
986 | return 0; | |
987 | ||
988 | if (acpi_get_parent(handle, &phandle)) | |
989 | return -ENODEV; | |
990 | ||
991 | if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) || | |
992 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) || | |
993 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) || | |
994 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp)))) | |
995 | return 0; | |
996 | ||
997 | return -ENODEV; | |
998 | } | |
999 | ||
3620f2f2 FS |
1000 | /* |
1001 | * acpi_dock_match - see if a device has a _DCK method | |
1002 | */ | |
1003 | static int acpi_dock_match(struct acpi_device *device) | |
1004 | { | |
1005 | acpi_handle tmp; | |
1006 | return acpi_get_handle(device->handle, "_DCK", &tmp); | |
1007 | } | |
1008 | ||
4be44fcd LB |
1009 | static void acpi_device_set_id(struct acpi_device *device, |
1010 | struct acpi_device *parent, acpi_handle handle, | |
1011 | int type) | |
1da177e4 | 1012 | { |
4be44fcd LB |
1013 | struct acpi_device_info *info; |
1014 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
1015 | char *hid = NULL; | |
1016 | char *uid = NULL; | |
1da177e4 | 1017 | struct acpi_compatible_id_list *cid_list = NULL; |
3620f2f2 | 1018 | const char *cid_add = NULL; |
4be44fcd | 1019 | acpi_status status; |
1da177e4 LT |
1020 | |
1021 | switch (type) { | |
1022 | case ACPI_BUS_TYPE_DEVICE: | |
1023 | status = acpi_get_object_info(handle, &buffer); | |
1024 | if (ACPI_FAILURE(status)) { | |
96b2dd1f | 1025 | printk(KERN_ERR PREFIX "%s: Error reading device info\n", __func__); |
1da177e4 LT |
1026 | return; |
1027 | } | |
1028 | ||
1029 | info = buffer.pointer; | |
1030 | if (info->valid & ACPI_VALID_HID) | |
1031 | hid = info->hardware_id.value; | |
1032 | if (info->valid & ACPI_VALID_UID) | |
1033 | uid = info->unique_id.value; | |
1034 | if (info->valid & ACPI_VALID_CID) | |
1035 | cid_list = &info->compatibility_id; | |
1036 | if (info->valid & ACPI_VALID_ADR) { | |
1037 | device->pnp.bus_address = info->address; | |
1038 | device->flags.bus_address = 1; | |
1039 | } | |
ae843332 | 1040 | |
3620f2f2 FS |
1041 | /* If we have a video/bay/dock device, add our selfdefined |
1042 | HID to the CID list. Like that the video/bay/dock drivers | |
1043 | will get autoloaded and the device might still match | |
1044 | against another driver. | |
1045 | */ | |
1046 | if (ACPI_SUCCESS(acpi_video_bus_match(device))) | |
1047 | cid_add = ACPI_VIDEO_HID; | |
1048 | else if (ACPI_SUCCESS(acpi_bay_match(device))) | |
1049 | cid_add = ACPI_BAY_HID; | |
1050 | else if (ACPI_SUCCESS(acpi_dock_match(device))) | |
1051 | cid_add = ACPI_DOCK_HID; | |
54735266 | 1052 | |
1da177e4 LT |
1053 | break; |
1054 | case ACPI_BUS_TYPE_POWER: | |
1055 | hid = ACPI_POWER_HID; | |
1056 | break; | |
1057 | case ACPI_BUS_TYPE_PROCESSOR: | |
1058 | hid = ACPI_PROCESSOR_HID; | |
1059 | break; | |
1060 | case ACPI_BUS_TYPE_SYSTEM: | |
1061 | hid = ACPI_SYSTEM_HID; | |
1062 | break; | |
1063 | case ACPI_BUS_TYPE_THERMAL: | |
1064 | hid = ACPI_THERMAL_HID; | |
1065 | break; | |
1066 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
1067 | hid = ACPI_BUTTON_HID_POWERF; | |
1068 | break; | |
1069 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
1070 | hid = ACPI_BUTTON_HID_SLEEPF; | |
1071 | break; | |
1072 | } | |
1073 | ||
1074 | /* | |
1075 | * \_SB | |
1076 | * ---- | |
1077 | * Fix for the system root bus device -- the only root-level device. | |
1078 | */ | |
c51a4de8 | 1079 | if (((acpi_handle)parent == ACPI_ROOT_OBJECT) && (type == ACPI_BUS_TYPE_DEVICE)) { |
1da177e4 LT |
1080 | hid = ACPI_BUS_HID; |
1081 | strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME); | |
1082 | strcpy(device->pnp.device_class, ACPI_BUS_CLASS); | |
1083 | } | |
1084 | ||
1085 | if (hid) { | |
1086 | strcpy(device->pnp.hardware_id, hid); | |
1087 | device->flags.hardware_id = 1; | |
1088 | } | |
1089 | if (uid) { | |
1090 | strcpy(device->pnp.unique_id, uid); | |
1091 | device->flags.unique_id = 1; | |
1092 | } | |
3620f2f2 FS |
1093 | if (cid_list || cid_add) { |
1094 | struct acpi_compatible_id_list *list; | |
1095 | int size = 0; | |
1096 | int count = 0; | |
1097 | ||
1098 | if (cid_list) { | |
1099 | size = cid_list->size; | |
1100 | } else if (cid_add) { | |
1101 | size = sizeof(struct acpi_compatible_id_list); | |
1102 | cid_list = ACPI_ALLOCATE_ZEROED((acpi_size) size); | |
1103 | if (!cid_list) { | |
1104 | printk(KERN_ERR "Memory allocation error\n"); | |
1105 | kfree(buffer.pointer); | |
1106 | return; | |
1107 | } else { | |
1108 | cid_list->count = 0; | |
1109 | cid_list->size = size; | |
1110 | } | |
1111 | } | |
1112 | if (cid_add) | |
1113 | size += sizeof(struct acpi_compatible_id); | |
1114 | list = kmalloc(size, GFP_KERNEL); | |
1115 | ||
1116 | if (list) { | |
1117 | if (cid_list) { | |
1118 | memcpy(list, cid_list, cid_list->size); | |
1119 | count = cid_list->count; | |
1120 | } | |
1121 | if (cid_add) { | |
1122 | strncpy(list->id[count].value, cid_add, | |
1123 | ACPI_MAX_CID_LENGTH); | |
1124 | count++; | |
1125 | device->flags.compatible_ids = 1; | |
1126 | } | |
1127 | list->size = size; | |
1128 | list->count = count; | |
1129 | device->pnp.cid_list = list; | |
1130 | } else | |
87ecd5cd | 1131 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
1da177e4 LT |
1132 | } |
1133 | ||
02438d87 | 1134 | kfree(buffer.pointer); |
1da177e4 LT |
1135 | } |
1136 | ||
4be44fcd | 1137 | static int acpi_device_set_context(struct acpi_device *device, int type) |
1da177e4 LT |
1138 | { |
1139 | acpi_status status = AE_OK; | |
1140 | int result = 0; | |
1141 | /* | |
1142 | * Context | |
1143 | * ------- | |
1144 | * Attach this 'struct acpi_device' to the ACPI object. This makes | |
1145 | * resolutions from handle->device very efficient. Note that we need | |
1146 | * to be careful with fixed-feature devices as they all attach to the | |
1147 | * root object. | |
1148 | */ | |
4be44fcd | 1149 | if (type != ACPI_BUS_TYPE_POWER_BUTTON && |
1da177e4 LT |
1150 | type != ACPI_BUS_TYPE_SLEEP_BUTTON) { |
1151 | status = acpi_attach_data(device->handle, | |
4be44fcd | 1152 | acpi_bus_data_handler, device); |
1da177e4 LT |
1153 | |
1154 | if (ACPI_FAILURE(status)) { | |
87ecd5cd | 1155 | printk(KERN_ERR PREFIX "Error attaching device data\n"); |
1da177e4 LT |
1156 | result = -ENODEV; |
1157 | } | |
1158 | } | |
1159 | return result; | |
1160 | } | |
1161 | ||
4be44fcd | 1162 | static int acpi_bus_remove(struct acpi_device *dev, int rmdevice) |
1da177e4 | 1163 | { |
1da177e4 | 1164 | if (!dev) |
d550d98d | 1165 | return -EINVAL; |
1da177e4 | 1166 | |
96333578 | 1167 | dev->removal_type = ACPI_BUS_REMOVAL_EJECT; |
1890a97a | 1168 | device_release_driver(&dev->dev); |
1da177e4 LT |
1169 | |
1170 | if (!rmdevice) | |
d550d98d | 1171 | return 0; |
1da177e4 | 1172 | |
2786f6e3 RZ |
1173 | /* |
1174 | * unbind _ADR-Based Devices when hot removal | |
1175 | */ | |
1da177e4 LT |
1176 | if (dev->flags.bus_address) { |
1177 | if ((dev->parent) && (dev->parent->ops.unbind)) | |
1178 | dev->parent->ops.unbind(dev); | |
1179 | } | |
1da177e4 LT |
1180 | acpi_device_unregister(dev, ACPI_BUS_REMOVAL_EJECT); |
1181 | ||
d550d98d | 1182 | return 0; |
1da177e4 LT |
1183 | } |
1184 | ||
3620f2f2 FS |
1185 | static int |
1186 | acpi_is_child_device(struct acpi_device *device, | |
1187 | int (*matcher)(struct acpi_device *)) | |
1188 | { | |
1189 | int result = -ENODEV; | |
1190 | ||
1191 | do { | |
1192 | if (ACPI_SUCCESS(matcher(device))) | |
1193 | return AE_OK; | |
1194 | } while ((device = device->parent)); | |
1195 | ||
1196 | return result; | |
1197 | } | |
1198 | ||
3fb02738 | 1199 | static int |
4be44fcd | 1200 | acpi_add_single_object(struct acpi_device **child, |
c4168bff LS |
1201 | struct acpi_device *parent, acpi_handle handle, int type, |
1202 | struct acpi_bus_ops *ops) | |
1da177e4 | 1203 | { |
4be44fcd LB |
1204 | int result = 0; |
1205 | struct acpi_device *device = NULL; | |
1da177e4 | 1206 | |
1da177e4 LT |
1207 | |
1208 | if (!child) | |
d550d98d | 1209 | return -EINVAL; |
1da177e4 | 1210 | |
36bcbec7 | 1211 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 1212 | if (!device) { |
6468463a | 1213 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 1214 | return -ENOMEM; |
1da177e4 | 1215 | } |
1da177e4 LT |
1216 | |
1217 | device->handle = handle; | |
1218 | device->parent = parent; | |
c4168bff LS |
1219 | device->bus_ops = *ops; /* workround for not call .start */ |
1220 | ||
1da177e4 | 1221 | |
4be44fcd | 1222 | acpi_device_get_busid(device, handle, type); |
1da177e4 LT |
1223 | |
1224 | /* | |
1225 | * Flags | |
1226 | * ----- | |
1227 | * Get prior to calling acpi_bus_get_status() so we know whether | |
1228 | * or not _STA is present. Note that we only look for object | |
1229 | * handles -- cannot evaluate objects until we know the device is | |
1230 | * present and properly initialized. | |
1231 | */ | |
1232 | result = acpi_bus_get_flags(device); | |
1233 | if (result) | |
1234 | goto end; | |
1235 | ||
1236 | /* | |
1237 | * Status | |
1238 | * ------ | |
6940faba KT |
1239 | * See if the device is present. We always assume that non-Device |
1240 | * and non-Processor objects (e.g. thermal zones, power resources, | |
1241 | * etc.) are present, functioning, etc. (at least when parent object | |
1242 | * is present). Note that _STA has a different meaning for some | |
1243 | * objects (e.g. power resources) so we need to be careful how we use | |
1244 | * it. | |
1da177e4 LT |
1245 | */ |
1246 | switch (type) { | |
6940faba | 1247 | case ACPI_BUS_TYPE_PROCESSOR: |
1da177e4 LT |
1248 | case ACPI_BUS_TYPE_DEVICE: |
1249 | result = acpi_bus_get_status(device); | |
3620f2f2 FS |
1250 | if (ACPI_FAILURE(result)) { |
1251 | result = -ENODEV; | |
1da177e4 LT |
1252 | goto end; |
1253 | } | |
3620f2f2 FS |
1254 | if (!device->status.present) { |
1255 | /* Bay and dock should be handled even if absent */ | |
1256 | if (!ACPI_SUCCESS( | |
1257 | acpi_is_child_device(device, acpi_bay_match)) && | |
1258 | !ACPI_SUCCESS( | |
1259 | acpi_is_child_device(device, acpi_dock_match))) { | |
1260 | result = -ENODEV; | |
1261 | goto end; | |
1262 | } | |
1263 | } | |
1da177e4 LT |
1264 | break; |
1265 | default: | |
0c0e8921 BH |
1266 | STRUCT_TO_INT(device->status) = |
1267 | ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | | |
1268 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; | |
1da177e4 LT |
1269 | break; |
1270 | } | |
1271 | ||
1272 | /* | |
1273 | * Initialize Device | |
1274 | * ----------------- | |
1275 | * TBD: Synch with Core's enumeration/initialization process. | |
1276 | */ | |
1277 | ||
1278 | /* | |
1279 | * Hardware ID, Unique ID, & Bus Address | |
1280 | * ------------------------------------- | |
1281 | */ | |
4be44fcd | 1282 | acpi_device_set_id(device, parent, handle, type); |
1da177e4 LT |
1283 | |
1284 | /* | |
1285 | * Power Management | |
1286 | * ---------------- | |
1287 | */ | |
1288 | if (device->flags.power_manageable) { | |
1289 | result = acpi_bus_get_power_flags(device); | |
1290 | if (result) | |
1291 | goto end; | |
1292 | } | |
1293 | ||
4be44fcd | 1294 | /* |
1da177e4 LT |
1295 | * Wakeup device management |
1296 | *----------------------- | |
1297 | */ | |
1298 | if (device->flags.wake_capable) { | |
1299 | result = acpi_bus_get_wakeup_device_flags(device); | |
1300 | if (result) | |
1301 | goto end; | |
1302 | } | |
1303 | ||
1304 | /* | |
1305 | * Performance Management | |
1306 | * ---------------------- | |
1307 | */ | |
1308 | if (device->flags.performance_manageable) { | |
1309 | result = acpi_bus_get_perf_flags(device); | |
1310 | if (result) | |
1311 | goto end; | |
1312 | } | |
1313 | ||
4be44fcd | 1314 | if ((result = acpi_device_set_context(device, type))) |
1da177e4 LT |
1315 | goto end; |
1316 | ||
e49bd2dd | 1317 | result = acpi_device_register(device, parent); |
1da177e4 LT |
1318 | |
1319 | /* | |
2786f6e3 | 1320 | * Bind _ADR-Based Devices when hot add |
1da177e4 LT |
1321 | */ |
1322 | if (device->flags.bus_address) { | |
1323 | if (device->parent && device->parent->ops.bind) | |
1324 | device->parent->ops.bind(device); | |
1325 | } | |
1326 | ||
4be44fcd | 1327 | end: |
1da177e4 LT |
1328 | if (!result) |
1329 | *child = device; | |
1330 | else { | |
6044ec88 | 1331 | kfree(device->pnp.cid_list); |
1da177e4 LT |
1332 | kfree(device); |
1333 | } | |
1334 | ||
d550d98d | 1335 | return result; |
1da177e4 | 1336 | } |
1da177e4 | 1337 | |
4be44fcd | 1338 | static int acpi_bus_scan(struct acpi_device *start, struct acpi_bus_ops *ops) |
1da177e4 | 1339 | { |
4be44fcd LB |
1340 | acpi_status status = AE_OK; |
1341 | struct acpi_device *parent = NULL; | |
1342 | struct acpi_device *child = NULL; | |
1343 | acpi_handle phandle = NULL; | |
1344 | acpi_handle chandle = NULL; | |
1345 | acpi_object_type type = 0; | |
1346 | u32 level = 1; | |
1da177e4 | 1347 | |
1da177e4 LT |
1348 | |
1349 | if (!start) | |
d550d98d | 1350 | return -EINVAL; |
1da177e4 LT |
1351 | |
1352 | parent = start; | |
1353 | phandle = start->handle; | |
4be44fcd | 1354 | |
1da177e4 LT |
1355 | /* |
1356 | * Parse through the ACPI namespace, identify all 'devices', and | |
1357 | * create a new 'struct acpi_device' for each. | |
1358 | */ | |
1359 | while ((level > 0) && parent) { | |
1360 | ||
1361 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, | |
4be44fcd | 1362 | chandle, &chandle); |
1da177e4 LT |
1363 | |
1364 | /* | |
1365 | * If this scope is exhausted then move our way back up. | |
1366 | */ | |
1367 | if (ACPI_FAILURE(status)) { | |
1368 | level--; | |
1369 | chandle = phandle; | |
1370 | acpi_get_parent(phandle, &phandle); | |
1371 | if (parent->parent) | |
1372 | parent = parent->parent; | |
1373 | continue; | |
1374 | } | |
1375 | ||
1376 | status = acpi_get_type(chandle, &type); | |
1377 | if (ACPI_FAILURE(status)) | |
1378 | continue; | |
1379 | ||
1380 | /* | |
1381 | * If this is a scope object then parse it (depth-first). | |
1382 | */ | |
1383 | if (type == ACPI_TYPE_LOCAL_SCOPE) { | |
1384 | level++; | |
1385 | phandle = chandle; | |
1386 | chandle = NULL; | |
1387 | continue; | |
1388 | } | |
1389 | ||
1390 | /* | |
1391 | * We're only interested in objects that we consider 'devices'. | |
1392 | */ | |
1393 | switch (type) { | |
1394 | case ACPI_TYPE_DEVICE: | |
1395 | type = ACPI_BUS_TYPE_DEVICE; | |
1396 | break; | |
1397 | case ACPI_TYPE_PROCESSOR: | |
1398 | type = ACPI_BUS_TYPE_PROCESSOR; | |
1399 | break; | |
1400 | case ACPI_TYPE_THERMAL: | |
1401 | type = ACPI_BUS_TYPE_THERMAL; | |
1402 | break; | |
1403 | case ACPI_TYPE_POWER: | |
1404 | type = ACPI_BUS_TYPE_POWER; | |
1405 | break; | |
1406 | default: | |
1407 | continue; | |
1408 | } | |
1409 | ||
3fb02738 RS |
1410 | if (ops->acpi_op_add) |
1411 | status = acpi_add_single_object(&child, parent, | |
c4168bff | 1412 | chandle, type, ops); |
4be44fcd | 1413 | else |
3fb02738 RS |
1414 | status = acpi_bus_get_device(chandle, &child); |
1415 | ||
4be44fcd LB |
1416 | if (ACPI_FAILURE(status)) |
1417 | continue; | |
3fb02738 | 1418 | |
c4168bff | 1419 | if (ops->acpi_op_start && !(ops->acpi_op_add)) { |
3fb02738 RS |
1420 | status = acpi_start_single_object(child); |
1421 | if (ACPI_FAILURE(status)) | |
1422 | continue; | |
1423 | } | |
1da177e4 LT |
1424 | |
1425 | /* | |
1426 | * If the device is present, enabled, and functioning then | |
1427 | * parse its scope (depth-first). Note that we need to | |
1428 | * represent absent devices to facilitate PnP notifications | |
1429 | * -- but only the subtree head (not all of its children, | |
1430 | * which will be enumerated when the parent is inserted). | |
1431 | * | |
1432 | * TBD: Need notifications and other detection mechanisms | |
4be44fcd | 1433 | * in place before we can fully implement this. |
1da177e4 LT |
1434 | */ |
1435 | if (child->status.present) { | |
1436 | status = acpi_get_next_object(ACPI_TYPE_ANY, chandle, | |
1437 | NULL, NULL); | |
1438 | if (ACPI_SUCCESS(status)) { | |
1439 | level++; | |
1440 | phandle = chandle; | |
1441 | chandle = NULL; | |
1442 | parent = child; | |
1443 | } | |
1444 | } | |
1445 | } | |
1446 | ||
d550d98d | 1447 | return 0; |
1da177e4 | 1448 | } |
1da177e4 | 1449 | |
3fb02738 | 1450 | int |
4be44fcd LB |
1451 | acpi_bus_add(struct acpi_device **child, |
1452 | struct acpi_device *parent, acpi_handle handle, int type) | |
3fb02738 RS |
1453 | { |
1454 | int result; | |
1455 | struct acpi_bus_ops ops; | |
1456 | ||
c4168bff LS |
1457 | memset(&ops, 0, sizeof(ops)); |
1458 | ops.acpi_op_add = 1; | |
3fb02738 | 1459 | |
c4168bff LS |
1460 | result = acpi_add_single_object(child, parent, handle, type, &ops); |
1461 | if (!result) | |
3fb02738 | 1462 | result = acpi_bus_scan(*child, &ops); |
c4168bff | 1463 | |
d550d98d | 1464 | return result; |
3fb02738 | 1465 | } |
4be44fcd | 1466 | |
3fb02738 RS |
1467 | EXPORT_SYMBOL(acpi_bus_add); |
1468 | ||
4be44fcd | 1469 | int acpi_bus_start(struct acpi_device *device) |
3fb02738 RS |
1470 | { |
1471 | int result; | |
1472 | struct acpi_bus_ops ops; | |
1473 | ||
3fb02738 RS |
1474 | |
1475 | if (!device) | |
d550d98d | 1476 | return -EINVAL; |
3fb02738 RS |
1477 | |
1478 | result = acpi_start_single_object(device); | |
1479 | if (!result) { | |
1480 | memset(&ops, 0, sizeof(ops)); | |
1481 | ops.acpi_op_start = 1; | |
1482 | result = acpi_bus_scan(device, &ops); | |
1483 | } | |
d550d98d | 1484 | return result; |
3fb02738 | 1485 | } |
4be44fcd | 1486 | |
3fb02738 | 1487 | EXPORT_SYMBOL(acpi_bus_start); |
1da177e4 | 1488 | |
ceaba663 | 1489 | int acpi_bus_trim(struct acpi_device *start, int rmdevice) |
1da177e4 | 1490 | { |
4be44fcd LB |
1491 | acpi_status status; |
1492 | struct acpi_device *parent, *child; | |
1493 | acpi_handle phandle, chandle; | |
1494 | acpi_object_type type; | |
1495 | u32 level = 1; | |
1496 | int err = 0; | |
1497 | ||
1498 | parent = start; | |
1da177e4 LT |
1499 | phandle = start->handle; |
1500 | child = chandle = NULL; | |
1501 | ||
1502 | while ((level > 0) && parent && (!err)) { | |
1503 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, | |
4be44fcd | 1504 | chandle, &chandle); |
1da177e4 LT |
1505 | |
1506 | /* | |
1507 | * If this scope is exhausted then move our way back up. | |
1508 | */ | |
1509 | if (ACPI_FAILURE(status)) { | |
1510 | level--; | |
1511 | chandle = phandle; | |
1512 | acpi_get_parent(phandle, &phandle); | |
1513 | child = parent; | |
1514 | parent = parent->parent; | |
1515 | ||
1516 | if (level == 0) | |
1517 | err = acpi_bus_remove(child, rmdevice); | |
1518 | else | |
1519 | err = acpi_bus_remove(child, 1); | |
1520 | ||
1521 | continue; | |
1522 | } | |
1523 | ||
1524 | status = acpi_get_type(chandle, &type); | |
1525 | if (ACPI_FAILURE(status)) { | |
1526 | continue; | |
1527 | } | |
1528 | /* | |
1529 | * If there is a device corresponding to chandle then | |
1530 | * parse it (depth-first). | |
1531 | */ | |
1532 | if (acpi_bus_get_device(chandle, &child) == 0) { | |
1533 | level++; | |
1534 | phandle = chandle; | |
1535 | chandle = NULL; | |
1536 | parent = child; | |
1537 | } | |
1538 | continue; | |
1539 | } | |
1540 | return err; | |
1541 | } | |
ceaba663 KA |
1542 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
1543 | ||
1da177e4 | 1544 | |
4be44fcd | 1545 | static int acpi_bus_scan_fixed(struct acpi_device *root) |
1da177e4 | 1546 | { |
4be44fcd LB |
1547 | int result = 0; |
1548 | struct acpi_device *device = NULL; | |
c4168bff | 1549 | struct acpi_bus_ops ops; |
1da177e4 LT |
1550 | |
1551 | if (!root) | |
d550d98d | 1552 | return -ENODEV; |
1da177e4 | 1553 | |
c4168bff LS |
1554 | memset(&ops, 0, sizeof(ops)); |
1555 | ops.acpi_op_add = 1; | |
1556 | ops.acpi_op_start = 1; | |
1557 | ||
1da177e4 LT |
1558 | /* |
1559 | * Enumerate all fixed-feature devices. | |
1560 | */ | |
cee324b1 | 1561 | if ((acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON) == 0) { |
3fb02738 | 1562 | result = acpi_add_single_object(&device, acpi_root, |
4be44fcd | 1563 | NULL, |
c4168bff LS |
1564 | ACPI_BUS_TYPE_POWER_BUTTON, |
1565 | &ops); | |
3fb02738 | 1566 | } |
1da177e4 | 1567 | |
cee324b1 | 1568 | if ((acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON) == 0) { |
3fb02738 | 1569 | result = acpi_add_single_object(&device, acpi_root, |
4be44fcd | 1570 | NULL, |
c4168bff LS |
1571 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
1572 | &ops); | |
3fb02738 | 1573 | } |
1da177e4 | 1574 | |
d550d98d | 1575 | return result; |
1da177e4 LT |
1576 | } |
1577 | ||
c04209a7 AS |
1578 | int __init acpi_boot_ec_enable(void); |
1579 | ||
1da177e4 LT |
1580 | static int __init acpi_scan_init(void) |
1581 | { | |
1582 | int result; | |
3fb02738 | 1583 | struct acpi_bus_ops ops; |
1da177e4 | 1584 | |
1da177e4 LT |
1585 | |
1586 | if (acpi_disabled) | |
d550d98d | 1587 | return 0; |
1da177e4 | 1588 | |
c4168bff LS |
1589 | memset(&ops, 0, sizeof(ops)); |
1590 | ops.acpi_op_add = 1; | |
1591 | ops.acpi_op_start = 1; | |
1da177e4 | 1592 | |
5b327265 PM |
1593 | result = bus_register(&acpi_bus_type); |
1594 | if (result) { | |
1595 | /* We don't want to quit even if we failed to add suspend/resume */ | |
1596 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
1597 | } | |
1598 | ||
1da177e4 LT |
1599 | /* |
1600 | * Create the root device in the bus's device tree | |
1601 | */ | |
3fb02738 | 1602 | result = acpi_add_single_object(&acpi_root, NULL, ACPI_ROOT_OBJECT, |
c4168bff | 1603 | ACPI_BUS_TYPE_SYSTEM, &ops); |
1da177e4 LT |
1604 | if (result) |
1605 | goto Done; | |
1606 | ||
1607 | /* | |
1608 | * Enumerate devices in the ACPI namespace. | |
1609 | */ | |
1610 | result = acpi_bus_scan_fixed(acpi_root); | |
c04209a7 AS |
1611 | |
1612 | /* EC region might be needed at bus_scan, so enable it now */ | |
1613 | acpi_boot_ec_enable(); | |
1614 | ||
c4168bff | 1615 | if (!result) |
3fb02738 | 1616 | result = acpi_bus_scan(acpi_root, &ops); |
1da177e4 LT |
1617 | |
1618 | if (result) | |
1619 | acpi_device_unregister(acpi_root, ACPI_BUS_REMOVAL_NORMAL); | |
1620 | ||
4be44fcd | 1621 | Done: |
d550d98d | 1622 | return result; |
1da177e4 LT |
1623 | } |
1624 | ||
1625 | subsys_initcall(acpi_scan_init); |