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Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * scan.c - support for transforming the ACPI namespace into individual objects | |
3 | */ | |
4 | ||
5 | #include <linux/module.h> | |
6 | #include <linux/init.h> | |
9b6d97b6 | 7 | #include <linux/kernel.h> |
1da177e4 | 8 | #include <linux/acpi.h> |
74523c90 AK |
9 | #include <linux/signal.h> |
10 | #include <linux/kthread.h> | |
1da177e4 LT |
11 | |
12 | #include <acpi/acpi_drivers.h> | |
1da177e4 | 13 | |
e60cc7a6 BH |
14 | #include "internal.h" |
15 | ||
1da177e4 | 16 | #define _COMPONENT ACPI_BUS_COMPONENT |
f52fd66d | 17 | ACPI_MODULE_NAME("scan"); |
1da177e4 | 18 | #define STRUCT_TO_INT(s) (*((int*)&s)) |
4be44fcd | 19 | extern struct acpi_device *acpi_root; |
1da177e4 LT |
20 | |
21 | #define ACPI_BUS_CLASS "system_bus" | |
29b71a1c | 22 | #define ACPI_BUS_HID "LNXSYBUS" |
1da177e4 LT |
23 | #define ACPI_BUS_DEVICE_NAME "System Bus" |
24 | ||
25 | static LIST_HEAD(acpi_device_list); | |
e49bd2dd | 26 | static LIST_HEAD(acpi_bus_id_list); |
9090589d | 27 | DEFINE_MUTEX(acpi_device_lock); |
1da177e4 LT |
28 | LIST_HEAD(acpi_wakeup_device_list); |
29 | ||
e49bd2dd | 30 | struct acpi_device_bus_id{ |
bb095854 | 31 | char bus_id[15]; |
e49bd2dd ZR |
32 | unsigned int instance_no; |
33 | struct list_head node; | |
1da177e4 | 34 | }; |
29b71a1c TR |
35 | |
36 | /* | |
37 | * Creates hid/cid(s) string needed for modalias and uevent | |
38 | * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: | |
39 | * char *modalias: "acpi:IBM0001:ACPI0001" | |
40 | */ | |
b3e572d2 AB |
41 | static int create_modalias(struct acpi_device *acpi_dev, char *modalias, |
42 | int size) | |
43 | { | |
29b71a1c | 44 | int len; |
5c9fcb5d | 45 | int count; |
29b71a1c | 46 | |
5c9fcb5d | 47 | if (!acpi_dev->flags.hardware_id && !acpi_dev->flags.compatible_ids) |
29b71a1c TR |
48 | return -ENODEV; |
49 | ||
5c9fcb5d | 50 | len = snprintf(modalias, size, "acpi:"); |
29b71a1c TR |
51 | size -= len; |
52 | ||
5c9fcb5d ZR |
53 | if (acpi_dev->flags.hardware_id) { |
54 | count = snprintf(&modalias[len], size, "%s:", | |
55 | acpi_dev->pnp.hardware_id); | |
56 | if (count < 0 || count >= size) | |
57 | return -EINVAL; | |
58 | len += count; | |
59 | size -= count; | |
60 | } | |
61 | ||
29b71a1c TR |
62 | if (acpi_dev->flags.compatible_ids) { |
63 | struct acpi_compatible_id_list *cid_list; | |
64 | int i; | |
29b71a1c TR |
65 | |
66 | cid_list = acpi_dev->pnp.cid_list; | |
67 | for (i = 0; i < cid_list->count; i++) { | |
68 | count = snprintf(&modalias[len], size, "%s:", | |
69 | cid_list->id[i].value); | |
70 | if (count < 0 || count >= size) { | |
87ecd5cd | 71 | printk(KERN_ERR PREFIX "%s cid[%i] exceeds event buffer size", |
29b71a1c TR |
72 | acpi_dev->pnp.device_name, i); |
73 | break; | |
74 | } | |
75 | len += count; | |
76 | size -= count; | |
77 | } | |
78 | } | |
79 | ||
80 | modalias[len] = '\0'; | |
81 | return len; | |
82 | } | |
83 | ||
84 | static ssize_t | |
85 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
86 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
87 | int len; | |
88 | ||
89 | /* Device has no HID and no CID or string is >1024 */ | |
90 | len = create_modalias(acpi_dev, buf, 1024); | |
91 | if (len <= 0) | |
92 | return 0; | |
93 | buf[len++] = '\n'; | |
94 | return len; | |
95 | } | |
96 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); | |
97 | ||
26d46867 | 98 | static int acpi_bus_hot_remove_device(void *context) |
1da177e4 | 99 | { |
26d46867 ZR |
100 | struct acpi_device *device; |
101 | acpi_handle handle = context; | |
1da177e4 LT |
102 | struct acpi_object_list arg_list; |
103 | union acpi_object arg; | |
104 | acpi_status status = AE_OK; | |
1da177e4 | 105 | |
26d46867 ZR |
106 | if (acpi_bus_get_device(handle, &device)) |
107 | return 0; | |
108 | ||
109 | if (!device) | |
110 | return 0; | |
111 | ||
112 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
0794469d | 113 | "Hot-removing device %s...\n", dev_name(&device->dev))); |
26d46867 ZR |
114 | |
115 | if (acpi_bus_trim(device, 1)) { | |
55ac9a01 LM |
116 | printk(KERN_ERR PREFIX |
117 | "Removing device failed\n"); | |
26d46867 ZR |
118 | return -1; |
119 | } | |
1da177e4 | 120 | |
26d46867 ZR |
121 | /* power off device */ |
122 | status = acpi_evaluate_object(handle, "_PS3", NULL, NULL); | |
123 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) | |
55ac9a01 LM |
124 | printk(KERN_WARNING PREFIX |
125 | "Power-off device failed\n"); | |
26d46867 ZR |
126 | |
127 | if (device->flags.lockable) { | |
1da177e4 LT |
128 | arg_list.count = 1; |
129 | arg_list.pointer = &arg; | |
130 | arg.type = ACPI_TYPE_INTEGER; | |
131 | arg.integer.value = 0; | |
132 | acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); | |
133 | } | |
1da177e4 | 134 | |
1da177e4 LT |
135 | arg_list.count = 1; |
136 | arg_list.pointer = &arg; | |
137 | arg.type = ACPI_TYPE_INTEGER; | |
138 | arg.integer.value = 1; | |
1da177e4 | 139 | |
1da177e4 LT |
140 | /* |
141 | * TBD: _EJD support. | |
142 | */ | |
1da177e4 | 143 | status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); |
26d46867 ZR |
144 | if (ACPI_FAILURE(status)) |
145 | return -ENODEV; | |
1da177e4 | 146 | |
26d46867 | 147 | return 0; |
1da177e4 LT |
148 | } |
149 | ||
1da177e4 | 150 | static ssize_t |
f883d9db PM |
151 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
152 | const char *buf, size_t count) | |
1da177e4 | 153 | { |
4be44fcd | 154 | int ret = count; |
4be44fcd | 155 | acpi_status status; |
4be44fcd | 156 | acpi_object_type type = 0; |
f883d9db | 157 | struct acpi_device *acpi_device = to_acpi_device(d); |
74523c90 | 158 | struct task_struct *task; |
1da177e4 | 159 | |
1da177e4 LT |
160 | if ((!count) || (buf[0] != '1')) { |
161 | return -EINVAL; | |
162 | } | |
1da177e4 | 163 | #ifndef FORCE_EJECT |
f883d9db | 164 | if (acpi_device->driver == NULL) { |
1da177e4 LT |
165 | ret = -ENODEV; |
166 | goto err; | |
167 | } | |
168 | #endif | |
f883d9db PM |
169 | status = acpi_get_type(acpi_device->handle, &type); |
170 | if (ACPI_FAILURE(status) || (!acpi_device->flags.ejectable)) { | |
1da177e4 LT |
171 | ret = -ENODEV; |
172 | goto err; | |
173 | } | |
1da177e4 | 174 | |
26d46867 | 175 | /* remove the device in another thread to fix the deadlock issue */ |
74523c90 AK |
176 | task = kthread_run(acpi_bus_hot_remove_device, |
177 | acpi_device->handle, "acpi_hot_remove_device"); | |
178 | if (IS_ERR(task)) | |
179 | ret = PTR_ERR(task); | |
180 | err: | |
1da177e4 | 181 | return ret; |
1da177e4 LT |
182 | } |
183 | ||
f883d9db | 184 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
1da177e4 | 185 | |
e49bd2dd ZR |
186 | static ssize_t |
187 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
188 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1da177e4 | 189 | |
e49bd2dd | 190 | return sprintf(buf, "%s\n", acpi_dev->pnp.hardware_id); |
1da177e4 | 191 | } |
e49bd2dd | 192 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
1da177e4 | 193 | |
e49bd2dd ZR |
194 | static ssize_t |
195 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
196 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
197 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
198 | int result; | |
1da177e4 | 199 | |
e49bd2dd ZR |
200 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
201 | if(result) | |
202 | goto end; | |
1da177e4 | 203 | |
e49bd2dd ZR |
204 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
205 | kfree(path.pointer); | |
206 | end: | |
207 | return result; | |
1da177e4 | 208 | } |
e49bd2dd | 209 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
1da177e4 | 210 | |
e49bd2dd | 211 | static int acpi_device_setup_files(struct acpi_device *dev) |
1da177e4 | 212 | { |
f883d9db PM |
213 | acpi_status status; |
214 | acpi_handle temp; | |
e49bd2dd | 215 | int result = 0; |
1da177e4 LT |
216 | |
217 | /* | |
e49bd2dd | 218 | * Devices gotten from FADT don't have a "path" attribute |
1da177e4 | 219 | */ |
e49bd2dd ZR |
220 | if(dev->handle) { |
221 | result = device_create_file(&dev->dev, &dev_attr_path); | |
222 | if(result) | |
223 | goto end; | |
1da177e4 LT |
224 | } |
225 | ||
e49bd2dd ZR |
226 | if(dev->flags.hardware_id) { |
227 | result = device_create_file(&dev->dev, &dev_attr_hid); | |
228 | if(result) | |
229 | goto end; | |
230 | } | |
1da177e4 | 231 | |
29b71a1c TR |
232 | if (dev->flags.hardware_id || dev->flags.compatible_ids){ |
233 | result = device_create_file(&dev->dev, &dev_attr_modalias); | |
234 | if(result) | |
235 | goto end; | |
236 | } | |
237 | ||
e49bd2dd ZR |
238 | /* |
239 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
240 | * hot-removal function from userland. | |
241 | */ | |
f883d9db PM |
242 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); |
243 | if (ACPI_SUCCESS(status)) | |
e49bd2dd ZR |
244 | result = device_create_file(&dev->dev, &dev_attr_eject); |
245 | end: | |
246 | return result; | |
1da177e4 LT |
247 | } |
248 | ||
f883d9db | 249 | static void acpi_device_remove_files(struct acpi_device *dev) |
1da177e4 | 250 | { |
f883d9db PM |
251 | acpi_status status; |
252 | acpi_handle temp; | |
1da177e4 | 253 | |
f883d9db PM |
254 | /* |
255 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
256 | * hot-removal function from userland. | |
257 | */ | |
258 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); | |
259 | if (ACPI_SUCCESS(status)) | |
260 | device_remove_file(&dev->dev, &dev_attr_eject); | |
1da177e4 | 261 | |
29b71a1c TR |
262 | if (dev->flags.hardware_id || dev->flags.compatible_ids) |
263 | device_remove_file(&dev->dev, &dev_attr_modalias); | |
264 | ||
e49bd2dd ZR |
265 | if(dev->flags.hardware_id) |
266 | device_remove_file(&dev->dev, &dev_attr_hid); | |
267 | if(dev->handle) | |
268 | device_remove_file(&dev->dev, &dev_attr_path); | |
1da177e4 | 269 | } |
1da177e4 | 270 | /* -------------------------------------------------------------------------- |
9e89dde2 | 271 | ACPI Bus operations |
1da177e4 | 272 | -------------------------------------------------------------------------- */ |
29b71a1c TR |
273 | |
274 | int acpi_match_device_ids(struct acpi_device *device, | |
275 | const struct acpi_device_id *ids) | |
276 | { | |
277 | const struct acpi_device_id *id; | |
278 | ||
39a0ad87 ZY |
279 | /* |
280 | * If the device is not present, it is unnecessary to load device | |
281 | * driver for it. | |
282 | */ | |
283 | if (!device->status.present) | |
284 | return -ENODEV; | |
285 | ||
29b71a1c TR |
286 | if (device->flags.hardware_id) { |
287 | for (id = ids; id->id[0]; id++) { | |
288 | if (!strcmp((char*)id->id, device->pnp.hardware_id)) | |
289 | return 0; | |
290 | } | |
291 | } | |
292 | ||
293 | if (device->flags.compatible_ids) { | |
294 | struct acpi_compatible_id_list *cid_list = device->pnp.cid_list; | |
295 | int i; | |
296 | ||
297 | for (id = ids; id->id[0]; id++) { | |
298 | /* compare multiple _CID entries against driver ids */ | |
299 | for (i = 0; i < cid_list->count; i++) { | |
300 | if (!strcmp((char*)id->id, | |
301 | cid_list->id[i].value)) | |
302 | return 0; | |
303 | } | |
304 | } | |
305 | } | |
306 | ||
307 | return -ENOENT; | |
308 | } | |
309 | EXPORT_SYMBOL(acpi_match_device_ids); | |
310 | ||
1890a97a | 311 | static void acpi_device_release(struct device *dev) |
1da177e4 | 312 | { |
1890a97a | 313 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 314 | |
1890a97a PM |
315 | kfree(acpi_dev->pnp.cid_list); |
316 | kfree(acpi_dev); | |
1da177e4 LT |
317 | } |
318 | ||
5d9464a4 | 319 | static int acpi_device_suspend(struct device *dev, pm_message_t state) |
1da177e4 | 320 | { |
5d9464a4 PM |
321 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
322 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
1da177e4 | 323 | |
5d9464a4 PM |
324 | if (acpi_drv && acpi_drv->ops.suspend) |
325 | return acpi_drv->ops.suspend(acpi_dev, state); | |
1da177e4 LT |
326 | return 0; |
327 | } | |
1da177e4 | 328 | |
5d9464a4 | 329 | static int acpi_device_resume(struct device *dev) |
9e89dde2 | 330 | { |
5d9464a4 PM |
331 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
332 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
1da177e4 | 333 | |
5d9464a4 PM |
334 | if (acpi_drv && acpi_drv->ops.resume) |
335 | return acpi_drv->ops.resume(acpi_dev); | |
d550d98d | 336 | return 0; |
1da177e4 LT |
337 | } |
338 | ||
5d9464a4 | 339 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 340 | { |
5d9464a4 PM |
341 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
342 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
1da177e4 | 343 | |
29b71a1c | 344 | return !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
5d9464a4 | 345 | } |
1da177e4 | 346 | |
7eff2e7a | 347 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 | 348 | { |
5d9464a4 | 349 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
7eff2e7a | 350 | int len; |
5d9464a4 | 351 | |
7eff2e7a KS |
352 | if (add_uevent_var(env, "MODALIAS=")) |
353 | return -ENOMEM; | |
354 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], | |
355 | sizeof(env->buf) - env->buflen); | |
356 | if (len >= (sizeof(env->buf) - env->buflen)) | |
357 | return -ENOMEM; | |
358 | env->buflen += len; | |
9e89dde2 | 359 | return 0; |
1da177e4 LT |
360 | } |
361 | ||
46ec8598 BH |
362 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
363 | { | |
364 | struct acpi_device *device = data; | |
365 | ||
366 | device->driver->ops.notify(device, event); | |
367 | } | |
368 | ||
369 | static acpi_status acpi_device_notify_fixed(void *data) | |
370 | { | |
371 | struct acpi_device *device = data; | |
372 | ||
373 | acpi_device_notify(device->handle, ACPI_FIXED_HARDWARE_EVENT, device); | |
374 | return AE_OK; | |
375 | } | |
376 | ||
377 | static int acpi_device_install_notify_handler(struct acpi_device *device) | |
378 | { | |
379 | acpi_status status; | |
380 | char *hid; | |
381 | ||
382 | hid = acpi_device_hid(device); | |
383 | if (!strcmp(hid, ACPI_BUTTON_HID_POWERF)) | |
384 | status = | |
385 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
386 | acpi_device_notify_fixed, | |
387 | device); | |
388 | else if (!strcmp(hid, ACPI_BUTTON_HID_SLEEPF)) | |
389 | status = | |
390 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
391 | acpi_device_notify_fixed, | |
392 | device); | |
393 | else | |
394 | status = acpi_install_notify_handler(device->handle, | |
395 | ACPI_DEVICE_NOTIFY, | |
396 | acpi_device_notify, | |
397 | device); | |
398 | ||
399 | if (ACPI_FAILURE(status)) | |
400 | return -EINVAL; | |
401 | return 0; | |
402 | } | |
403 | ||
404 | static void acpi_device_remove_notify_handler(struct acpi_device *device) | |
405 | { | |
406 | if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_POWERF)) | |
407 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
408 | acpi_device_notify_fixed); | |
409 | else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_SLEEPF)) | |
410 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
411 | acpi_device_notify_fixed); | |
412 | else | |
413 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, | |
414 | acpi_device_notify); | |
415 | } | |
416 | ||
5d9464a4 PM |
417 | static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *); |
418 | static int acpi_start_single_object(struct acpi_device *); | |
419 | static int acpi_device_probe(struct device * dev) | |
1da177e4 | 420 | { |
5d9464a4 PM |
421 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
422 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
423 | int ret; | |
424 | ||
425 | ret = acpi_bus_driver_init(acpi_dev, acpi_drv); | |
426 | if (!ret) { | |
c4168bff LS |
427 | if (acpi_dev->bus_ops.acpi_op_start) |
428 | acpi_start_single_object(acpi_dev); | |
46ec8598 BH |
429 | |
430 | if (acpi_drv->ops.notify) { | |
431 | ret = acpi_device_install_notify_handler(acpi_dev); | |
432 | if (ret) { | |
433 | if (acpi_drv->ops.stop) | |
434 | acpi_drv->ops.stop(acpi_dev, | |
435 | acpi_dev->removal_type); | |
436 | if (acpi_drv->ops.remove) | |
437 | acpi_drv->ops.remove(acpi_dev, | |
438 | acpi_dev->removal_type); | |
439 | return ret; | |
440 | } | |
441 | } | |
442 | ||
5d9464a4 PM |
443 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
444 | "Found driver [%s] for device [%s]\n", | |
445 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
446 | get_device(dev); | |
447 | } | |
448 | return ret; | |
449 | } | |
1da177e4 | 450 | |
5d9464a4 PM |
451 | static int acpi_device_remove(struct device * dev) |
452 | { | |
453 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
454 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
455 | ||
456 | if (acpi_drv) { | |
46ec8598 BH |
457 | if (acpi_drv->ops.notify) |
458 | acpi_device_remove_notify_handler(acpi_dev); | |
5d9464a4 | 459 | if (acpi_drv->ops.stop) |
96333578 | 460 | acpi_drv->ops.stop(acpi_dev, acpi_dev->removal_type); |
5d9464a4 | 461 | if (acpi_drv->ops.remove) |
96333578 | 462 | acpi_drv->ops.remove(acpi_dev, acpi_dev->removal_type); |
1da177e4 | 463 | } |
5d9464a4 | 464 | acpi_dev->driver = NULL; |
db89b4f0 | 465 | acpi_dev->driver_data = NULL; |
1da177e4 | 466 | |
5d9464a4 | 467 | put_device(dev); |
9e89dde2 ZR |
468 | return 0; |
469 | } | |
1da177e4 | 470 | |
55955aad | 471 | struct bus_type acpi_bus_type = { |
9e89dde2 ZR |
472 | .name = "acpi", |
473 | .suspend = acpi_device_suspend, | |
474 | .resume = acpi_device_resume, | |
5d9464a4 PM |
475 | .match = acpi_bus_match, |
476 | .probe = acpi_device_probe, | |
477 | .remove = acpi_device_remove, | |
478 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
479 | }; |
480 | ||
e49bd2dd | 481 | static int acpi_device_register(struct acpi_device *device, |
9e89dde2 | 482 | struct acpi_device *parent) |
1da177e4 | 483 | { |
4be44fcd | 484 | int result; |
e49bd2dd ZR |
485 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
486 | int found = 0; | |
9e89dde2 ZR |
487 | /* |
488 | * Linkage | |
489 | * ------- | |
490 | * Link this device to its parent and siblings. | |
491 | */ | |
492 | INIT_LIST_HEAD(&device->children); | |
493 | INIT_LIST_HEAD(&device->node); | |
9e89dde2 | 494 | INIT_LIST_HEAD(&device->wakeup_list); |
1da177e4 | 495 | |
e49bd2dd ZR |
496 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
497 | if (!new_bus_id) { | |
498 | printk(KERN_ERR PREFIX "Memory allocation error\n"); | |
499 | return -ENOMEM; | |
1da177e4 | 500 | } |
e49bd2dd | 501 | |
9090589d | 502 | mutex_lock(&acpi_device_lock); |
e49bd2dd ZR |
503 | /* |
504 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
505 | * If failed, create one and link it into acpi_bus_id_list | |
506 | */ | |
507 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
bb095854 | 508 | if(!strcmp(acpi_device_bus_id->bus_id, device->flags.hardware_id? device->pnp.hardware_id : "device")) { |
e49bd2dd ZR |
509 | acpi_device_bus_id->instance_no ++; |
510 | found = 1; | |
511 | kfree(new_bus_id); | |
512 | break; | |
513 | } | |
1da177e4 | 514 | } |
e49bd2dd ZR |
515 | if(!found) { |
516 | acpi_device_bus_id = new_bus_id; | |
bb095854 | 517 | strcpy(acpi_device_bus_id->bus_id, device->flags.hardware_id ? device->pnp.hardware_id : "device"); |
e49bd2dd ZR |
518 | acpi_device_bus_id->instance_no = 0; |
519 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 520 | } |
0794469d | 521 | dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 522 | |
33b57150 | 523 | if (device->parent) |
9e89dde2 | 524 | list_add_tail(&device->node, &device->parent->children); |
33b57150 | 525 | |
9e89dde2 ZR |
526 | if (device->wakeup.flags.valid) |
527 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
9090589d | 528 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 529 | |
1890a97a PM |
530 | if (device->parent) |
531 | device->dev.parent = &parent->dev; | |
532 | device->dev.bus = &acpi_bus_type; | |
533 | device_initialize(&device->dev); | |
1890a97a | 534 | device->dev.release = &acpi_device_release; |
e49bd2dd ZR |
535 | result = device_add(&device->dev); |
536 | if(result) { | |
fc3a8828 | 537 | dev_err(&device->dev, "Error adding device\n"); |
e49bd2dd | 538 | goto end; |
1da177e4 | 539 | } |
1da177e4 | 540 | |
e49bd2dd ZR |
541 | result = acpi_device_setup_files(device); |
542 | if(result) | |
0794469d KS |
543 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
544 | dev_name(&device->dev)); | |
1da177e4 | 545 | |
96333578 | 546 | device->removal_type = ACPI_BUS_REMOVAL_NORMAL; |
1da177e4 | 547 | return 0; |
e49bd2dd | 548 | end: |
9090589d | 549 | mutex_lock(&acpi_device_lock); |
33b57150 | 550 | if (device->parent) |
e49bd2dd | 551 | list_del(&device->node); |
e49bd2dd | 552 | list_del(&device->wakeup_list); |
9090589d | 553 | mutex_unlock(&acpi_device_lock); |
e49bd2dd | 554 | return result; |
1da177e4 LT |
555 | } |
556 | ||
9e89dde2 ZR |
557 | static void acpi_device_unregister(struct acpi_device *device, int type) |
558 | { | |
9090589d | 559 | mutex_lock(&acpi_device_lock); |
33b57150 | 560 | if (device->parent) |
9e89dde2 | 561 | list_del(&device->node); |
1da177e4 | 562 | |
9e89dde2 | 563 | list_del(&device->wakeup_list); |
9090589d | 564 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 565 | |
9e89dde2 | 566 | acpi_detach_data(device->handle, acpi_bus_data_handler); |
1890a97a | 567 | |
f883d9db | 568 | acpi_device_remove_files(device); |
1890a97a | 569 | device_unregister(&device->dev); |
1da177e4 LT |
570 | } |
571 | ||
9e89dde2 ZR |
572 | /* -------------------------------------------------------------------------- |
573 | Driver Management | |
574 | -------------------------------------------------------------------------- */ | |
1da177e4 | 575 | /** |
d758a8fa RD |
576 | * acpi_bus_driver_init - add a device to a driver |
577 | * @device: the device to add and initialize | |
578 | * @driver: driver for the device | |
579 | * | |
1da177e4 | 580 | * Used to initialize a device via its device driver. Called whenever a |
1890a97a | 581 | * driver is bound to a device. Invokes the driver's add() ops. |
1da177e4 LT |
582 | */ |
583 | static int | |
4be44fcd | 584 | acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) |
1da177e4 | 585 | { |
4be44fcd | 586 | int result = 0; |
1da177e4 | 587 | |
1da177e4 LT |
588 | |
589 | if (!device || !driver) | |
d550d98d | 590 | return -EINVAL; |
1da177e4 LT |
591 | |
592 | if (!driver->ops.add) | |
d550d98d | 593 | return -ENOSYS; |
1da177e4 LT |
594 | |
595 | result = driver->ops.add(device); | |
596 | if (result) { | |
597 | device->driver = NULL; | |
db89b4f0 | 598 | device->driver_data = NULL; |
d550d98d | 599 | return result; |
1da177e4 LT |
600 | } |
601 | ||
602 | device->driver = driver; | |
603 | ||
604 | /* | |
605 | * TBD - Configuration Management: Assign resources to device based | |
606 | * upon possible configuration and currently allocated resources. | |
607 | */ | |
608 | ||
4be44fcd LB |
609 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
610 | "Driver successfully bound to device\n")); | |
d550d98d | 611 | return 0; |
3fb02738 RS |
612 | } |
613 | ||
8713cbef | 614 | static int acpi_start_single_object(struct acpi_device *device) |
3fb02738 RS |
615 | { |
616 | int result = 0; | |
617 | struct acpi_driver *driver; | |
618 | ||
3fb02738 RS |
619 | |
620 | if (!(driver = device->driver)) | |
d550d98d | 621 | return 0; |
3fb02738 | 622 | |
1da177e4 LT |
623 | if (driver->ops.start) { |
624 | result = driver->ops.start(device); | |
625 | if (result && driver->ops.remove) | |
626 | driver->ops.remove(device, ACPI_BUS_REMOVAL_NORMAL); | |
1da177e4 LT |
627 | } |
628 | ||
d550d98d | 629 | return result; |
1da177e4 LT |
630 | } |
631 | ||
9e89dde2 ZR |
632 | /** |
633 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
634 | * @driver: driver being registered | |
635 | * | |
636 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
637 | * devices that match the driver's criteria and binds. Returns zero for | |
638 | * success or a negative error status for failure. | |
639 | */ | |
640 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
1da177e4 | 641 | { |
1890a97a | 642 | int ret; |
1da177e4 | 643 | |
9e89dde2 ZR |
644 | if (acpi_disabled) |
645 | return -ENODEV; | |
1890a97a PM |
646 | driver->drv.name = driver->name; |
647 | driver->drv.bus = &acpi_bus_type; | |
648 | driver->drv.owner = driver->owner; | |
1da177e4 | 649 | |
1890a97a PM |
650 | ret = driver_register(&driver->drv); |
651 | return ret; | |
9e89dde2 | 652 | } |
1da177e4 | 653 | |
9e89dde2 ZR |
654 | EXPORT_SYMBOL(acpi_bus_register_driver); |
655 | ||
656 | /** | |
657 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus | |
658 | * @driver: driver to unregister | |
659 | * | |
660 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
661 | * devices that match the driver's criteria and unbinds. | |
662 | */ | |
663 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
664 | { | |
1890a97a | 665 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
666 | } |
667 | ||
668 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
669 | ||
9e89dde2 ZR |
670 | /* -------------------------------------------------------------------------- |
671 | Device Enumeration | |
672 | -------------------------------------------------------------------------- */ | |
673 | acpi_status | |
674 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
675 | { | |
676 | acpi_status status; | |
677 | acpi_handle tmp; | |
678 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
679 | union acpi_object *obj; | |
680 | ||
681 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
682 | if (ACPI_FAILURE(status)) | |
683 | return status; | |
684 | ||
685 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
686 | if (ACPI_SUCCESS(status)) { | |
687 | obj = buffer.pointer; | |
3b5fee59 HM |
688 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
689 | ejd); | |
9e89dde2 ZR |
690 | kfree(buffer.pointer); |
691 | } | |
692 | return status; | |
693 | } | |
694 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
695 | ||
696 | void acpi_bus_data_handler(acpi_handle handle, u32 function, void *context) | |
697 | { | |
698 | ||
699 | /* TBD */ | |
700 | ||
701 | return; | |
702 | } | |
703 | ||
9e89dde2 ZR |
704 | static int acpi_bus_get_perf_flags(struct acpi_device *device) |
705 | { | |
706 | device->performance.state = ACPI_STATE_UNKNOWN; | |
707 | return 0; | |
708 | } | |
709 | ||
710 | static acpi_status | |
711 | acpi_bus_extract_wakeup_device_power_package(struct acpi_device *device, | |
712 | union acpi_object *package) | |
713 | { | |
714 | int i = 0; | |
715 | union acpi_object *element = NULL; | |
716 | ||
717 | if (!device || !package || (package->package.count < 2)) | |
718 | return AE_BAD_PARAMETER; | |
719 | ||
720 | element = &(package->package.elements[0]); | |
721 | if (!element) | |
722 | return AE_BAD_PARAMETER; | |
723 | if (element->type == ACPI_TYPE_PACKAGE) { | |
724 | if ((element->package.count < 2) || | |
725 | (element->package.elements[0].type != | |
726 | ACPI_TYPE_LOCAL_REFERENCE) | |
727 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) | |
728 | return AE_BAD_DATA; | |
729 | device->wakeup.gpe_device = | |
730 | element->package.elements[0].reference.handle; | |
731 | device->wakeup.gpe_number = | |
732 | (u32) element->package.elements[1].integer.value; | |
733 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
734 | device->wakeup.gpe_number = element->integer.value; | |
735 | } else | |
736 | return AE_BAD_DATA; | |
737 | ||
738 | element = &(package->package.elements[1]); | |
739 | if (element->type != ACPI_TYPE_INTEGER) { | |
740 | return AE_BAD_DATA; | |
741 | } | |
742 | device->wakeup.sleep_state = element->integer.value; | |
743 | ||
744 | if ((package->package.count - 2) > ACPI_MAX_HANDLES) { | |
745 | return AE_NO_MEMORY; | |
746 | } | |
747 | device->wakeup.resources.count = package->package.count - 2; | |
748 | for (i = 0; i < device->wakeup.resources.count; i++) { | |
749 | element = &(package->package.elements[i + 2]); | |
cd0b2248 | 750 | if (element->type != ACPI_TYPE_LOCAL_REFERENCE) |
9e89dde2 | 751 | return AE_BAD_DATA; |
9e89dde2 ZR |
752 | |
753 | device->wakeup.resources.handles[i] = element->reference.handle; | |
1da177e4 | 754 | } |
9e89dde2 ZR |
755 | |
756 | return AE_OK; | |
1da177e4 LT |
757 | } |
758 | ||
9e89dde2 | 759 | static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
1da177e4 | 760 | { |
9e89dde2 ZR |
761 | acpi_status status = 0; |
762 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
763 | union acpi_object *package = NULL; | |
77e76609 | 764 | int psw_error; |
1da177e4 | 765 | |
29b71a1c TR |
766 | struct acpi_device_id button_device_ids[] = { |
767 | {"PNP0C0D", 0}, | |
768 | {"PNP0C0C", 0}, | |
769 | {"PNP0C0E", 0}, | |
770 | {"", 0}, | |
771 | }; | |
772 | ||
9e89dde2 ZR |
773 | /* _PRW */ |
774 | status = acpi_evaluate_object(device->handle, "_PRW", NULL, &buffer); | |
775 | if (ACPI_FAILURE(status)) { | |
776 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
777 | goto end; | |
1da177e4 | 778 | } |
1da177e4 | 779 | |
9e89dde2 ZR |
780 | package = (union acpi_object *)buffer.pointer; |
781 | status = acpi_bus_extract_wakeup_device_power_package(device, package); | |
782 | if (ACPI_FAILURE(status)) { | |
783 | ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package")); | |
784 | goto end; | |
785 | } | |
1da177e4 | 786 | |
9e89dde2 | 787 | kfree(buffer.pointer); |
1da177e4 | 788 | |
9e89dde2 | 789 | device->wakeup.flags.valid = 1; |
729b2bdb ZY |
790 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
791 | * system for the ACPI device with the _PRW object. | |
792 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. | |
793 | * So it is necessary to call _DSW object first. Only when it is not | |
794 | * present will the _PSW object used. | |
795 | */ | |
77e76609 RW |
796 | psw_error = acpi_device_sleep_wake(device, 0, 0, 0); |
797 | if (psw_error) | |
798 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
799 | "error in _DSW or _PSW evaluation\n")); | |
800 | ||
9e89dde2 | 801 | /* Power button, Lid switch always enable wakeup */ |
29b71a1c | 802 | if (!acpi_match_device_ids(device, button_device_ids)) |
9e89dde2 | 803 | device->wakeup.flags.run_wake = 1; |
1da177e4 | 804 | |
9e89dde2 ZR |
805 | end: |
806 | if (ACPI_FAILURE(status)) | |
807 | device->flags.wake_capable = 0; | |
d550d98d | 808 | return 0; |
1da177e4 | 809 | } |
1da177e4 | 810 | |
9e89dde2 | 811 | static int acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 812 | { |
9e89dde2 ZR |
813 | acpi_status status = 0; |
814 | acpi_handle handle = NULL; | |
815 | u32 i = 0; | |
1a365616 | 816 | |
4be44fcd | 817 | |
9e89dde2 ZR |
818 | /* |
819 | * Power Management Flags | |
820 | */ | |
821 | status = acpi_get_handle(device->handle, "_PSC", &handle); | |
822 | if (ACPI_SUCCESS(status)) | |
823 | device->power.flags.explicit_get = 1; | |
824 | status = acpi_get_handle(device->handle, "_IRC", &handle); | |
825 | if (ACPI_SUCCESS(status)) | |
826 | device->power.flags.inrush_current = 1; | |
1da177e4 | 827 | |
9e89dde2 ZR |
828 | /* |
829 | * Enumerate supported power management states | |
830 | */ | |
831 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3; i++) { | |
832 | struct acpi_device_power_state *ps = &device->power.states[i]; | |
833 | char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' }; | |
1da177e4 | 834 | |
9e89dde2 ZR |
835 | /* Evaluate "_PRx" to se if power resources are referenced */ |
836 | acpi_evaluate_reference(device->handle, object_name, NULL, | |
837 | &ps->resources); | |
838 | if (ps->resources.count) { | |
839 | device->power.flags.power_resources = 1; | |
840 | ps->flags.valid = 1; | |
1da177e4 | 841 | } |
1da177e4 | 842 | |
9e89dde2 ZR |
843 | /* Evaluate "_PSx" to see if we can do explicit sets */ |
844 | object_name[2] = 'S'; | |
845 | status = acpi_get_handle(device->handle, object_name, &handle); | |
846 | if (ACPI_SUCCESS(status)) { | |
847 | ps->flags.explicit_set = 1; | |
848 | ps->flags.valid = 1; | |
1da177e4 | 849 | } |
1da177e4 | 850 | |
9e89dde2 ZR |
851 | /* State is valid if we have some power control */ |
852 | if (ps->resources.count || ps->flags.explicit_set) | |
853 | ps->flags.valid = 1; | |
1da177e4 | 854 | |
9e89dde2 ZR |
855 | ps->power = -1; /* Unknown - driver assigned */ |
856 | ps->latency = -1; /* Unknown - driver assigned */ | |
857 | } | |
1da177e4 | 858 | |
9e89dde2 ZR |
859 | /* Set defaults for D0 and D3 states (always valid) */ |
860 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
861 | device->power.states[ACPI_STATE_D0].power = 100; | |
862 | device->power.states[ACPI_STATE_D3].flags.valid = 1; | |
863 | device->power.states[ACPI_STATE_D3].power = 0; | |
c8f7a62c | 864 | |
9e89dde2 | 865 | /* TBD: System wake support and resource requirements. */ |
c8f7a62c | 866 | |
9e89dde2 | 867 | device->power.state = ACPI_STATE_UNKNOWN; |
a51e145f | 868 | acpi_bus_get_power(device->handle, &(device->power.state)); |
c8f7a62c | 869 | |
9e89dde2 ZR |
870 | return 0; |
871 | } | |
c8f7a62c | 872 | |
4be44fcd | 873 | static int acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 874 | { |
4be44fcd LB |
875 | acpi_status status = AE_OK; |
876 | acpi_handle temp = NULL; | |
1da177e4 | 877 | |
1da177e4 LT |
878 | |
879 | /* Presence of _STA indicates 'dynamic_status' */ | |
880 | status = acpi_get_handle(device->handle, "_STA", &temp); | |
881 | if (ACPI_SUCCESS(status)) | |
882 | device->flags.dynamic_status = 1; | |
883 | ||
884 | /* Presence of _CID indicates 'compatible_ids' */ | |
885 | status = acpi_get_handle(device->handle, "_CID", &temp); | |
886 | if (ACPI_SUCCESS(status)) | |
887 | device->flags.compatible_ids = 1; | |
888 | ||
889 | /* Presence of _RMV indicates 'removable' */ | |
890 | status = acpi_get_handle(device->handle, "_RMV", &temp); | |
891 | if (ACPI_SUCCESS(status)) | |
892 | device->flags.removable = 1; | |
893 | ||
894 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
895 | status = acpi_get_handle(device->handle, "_EJD", &temp); | |
896 | if (ACPI_SUCCESS(status)) | |
897 | device->flags.ejectable = 1; | |
898 | else { | |
899 | status = acpi_get_handle(device->handle, "_EJ0", &temp); | |
900 | if (ACPI_SUCCESS(status)) | |
901 | device->flags.ejectable = 1; | |
902 | } | |
903 | ||
904 | /* Presence of _LCK indicates 'lockable' */ | |
905 | status = acpi_get_handle(device->handle, "_LCK", &temp); | |
906 | if (ACPI_SUCCESS(status)) | |
907 | device->flags.lockable = 1; | |
908 | ||
909 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ | |
910 | status = acpi_get_handle(device->handle, "_PS0", &temp); | |
911 | if (ACPI_FAILURE(status)) | |
912 | status = acpi_get_handle(device->handle, "_PR0", &temp); | |
913 | if (ACPI_SUCCESS(status)) | |
914 | device->flags.power_manageable = 1; | |
915 | ||
916 | /* Presence of _PRW indicates wake capable */ | |
917 | status = acpi_get_handle(device->handle, "_PRW", &temp); | |
918 | if (ACPI_SUCCESS(status)) | |
919 | device->flags.wake_capable = 1; | |
920 | ||
3c5f9be4 | 921 | /* TBD: Performance management */ |
1da177e4 | 922 | |
d550d98d | 923 | return 0; |
1da177e4 LT |
924 | } |
925 | ||
4be44fcd LB |
926 | static void acpi_device_get_busid(struct acpi_device *device, |
927 | acpi_handle handle, int type) | |
1da177e4 | 928 | { |
4be44fcd LB |
929 | char bus_id[5] = { '?', 0 }; |
930 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
931 | int i = 0; | |
1da177e4 LT |
932 | |
933 | /* | |
934 | * Bus ID | |
935 | * ------ | |
936 | * The device's Bus ID is simply the object name. | |
937 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
938 | */ | |
939 | switch (type) { | |
940 | case ACPI_BUS_TYPE_SYSTEM: | |
941 | strcpy(device->pnp.bus_id, "ACPI"); | |
942 | break; | |
943 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
944 | strcpy(device->pnp.bus_id, "PWRF"); | |
945 | break; | |
946 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
947 | strcpy(device->pnp.bus_id, "SLPF"); | |
948 | break; | |
949 | default: | |
950 | acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer); | |
951 | /* Clean up trailing underscores (if any) */ | |
952 | for (i = 3; i > 1; i--) { | |
953 | if (bus_id[i] == '_') | |
954 | bus_id[i] = '\0'; | |
955 | else | |
956 | break; | |
957 | } | |
958 | strcpy(device->pnp.bus_id, bus_id); | |
959 | break; | |
960 | } | |
961 | } | |
962 | ||
54735266 ZR |
963 | /* |
964 | * acpi_bay_match - see if a device is an ejectable driver bay | |
965 | * | |
966 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
967 | * then we can safely call it an ejectable drive bay | |
968 | */ | |
969 | static int acpi_bay_match(struct acpi_device *device){ | |
970 | acpi_status status; | |
971 | acpi_handle handle; | |
972 | acpi_handle tmp; | |
973 | acpi_handle phandle; | |
974 | ||
975 | handle = device->handle; | |
976 | ||
977 | status = acpi_get_handle(handle, "_EJ0", &tmp); | |
978 | if (ACPI_FAILURE(status)) | |
979 | return -ENODEV; | |
980 | ||
981 | if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || | |
982 | (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || | |
983 | (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || | |
984 | (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) | |
985 | return 0; | |
986 | ||
987 | if (acpi_get_parent(handle, &phandle)) | |
988 | return -ENODEV; | |
989 | ||
990 | if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) || | |
991 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) || | |
992 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) || | |
993 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp)))) | |
994 | return 0; | |
995 | ||
996 | return -ENODEV; | |
997 | } | |
998 | ||
3620f2f2 FS |
999 | /* |
1000 | * acpi_dock_match - see if a device has a _DCK method | |
1001 | */ | |
1002 | static int acpi_dock_match(struct acpi_device *device) | |
1003 | { | |
1004 | acpi_handle tmp; | |
1005 | return acpi_get_handle(device->handle, "_DCK", &tmp); | |
1006 | } | |
1007 | ||
4be44fcd LB |
1008 | static void acpi_device_set_id(struct acpi_device *device, |
1009 | struct acpi_device *parent, acpi_handle handle, | |
1010 | int type) | |
1da177e4 | 1011 | { |
4be44fcd LB |
1012 | struct acpi_device_info *info; |
1013 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
1014 | char *hid = NULL; | |
1015 | char *uid = NULL; | |
1da177e4 | 1016 | struct acpi_compatible_id_list *cid_list = NULL; |
3620f2f2 | 1017 | const char *cid_add = NULL; |
4be44fcd | 1018 | acpi_status status; |
1da177e4 LT |
1019 | |
1020 | switch (type) { | |
1021 | case ACPI_BUS_TYPE_DEVICE: | |
1022 | status = acpi_get_object_info(handle, &buffer); | |
1023 | if (ACPI_FAILURE(status)) { | |
96b2dd1f | 1024 | printk(KERN_ERR PREFIX "%s: Error reading device info\n", __func__); |
1da177e4 LT |
1025 | return; |
1026 | } | |
1027 | ||
1028 | info = buffer.pointer; | |
1029 | if (info->valid & ACPI_VALID_HID) | |
1030 | hid = info->hardware_id.value; | |
1031 | if (info->valid & ACPI_VALID_UID) | |
1032 | uid = info->unique_id.value; | |
1033 | if (info->valid & ACPI_VALID_CID) | |
1034 | cid_list = &info->compatibility_id; | |
1035 | if (info->valid & ACPI_VALID_ADR) { | |
1036 | device->pnp.bus_address = info->address; | |
1037 | device->flags.bus_address = 1; | |
1038 | } | |
ae843332 | 1039 | |
3620f2f2 FS |
1040 | /* If we have a video/bay/dock device, add our selfdefined |
1041 | HID to the CID list. Like that the video/bay/dock drivers | |
1042 | will get autoloaded and the device might still match | |
1043 | against another driver. | |
1044 | */ | |
c3d6de69 | 1045 | if (acpi_is_video_device(device)) |
3620f2f2 FS |
1046 | cid_add = ACPI_VIDEO_HID; |
1047 | else if (ACPI_SUCCESS(acpi_bay_match(device))) | |
1048 | cid_add = ACPI_BAY_HID; | |
1049 | else if (ACPI_SUCCESS(acpi_dock_match(device))) | |
1050 | cid_add = ACPI_DOCK_HID; | |
54735266 | 1051 | |
1da177e4 LT |
1052 | break; |
1053 | case ACPI_BUS_TYPE_POWER: | |
1054 | hid = ACPI_POWER_HID; | |
1055 | break; | |
1056 | case ACPI_BUS_TYPE_PROCESSOR: | |
ad93a765 | 1057 | hid = ACPI_PROCESSOR_OBJECT_HID; |
1da177e4 LT |
1058 | break; |
1059 | case ACPI_BUS_TYPE_SYSTEM: | |
1060 | hid = ACPI_SYSTEM_HID; | |
1061 | break; | |
1062 | case ACPI_BUS_TYPE_THERMAL: | |
1063 | hid = ACPI_THERMAL_HID; | |
1064 | break; | |
1065 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
1066 | hid = ACPI_BUTTON_HID_POWERF; | |
1067 | break; | |
1068 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
1069 | hid = ACPI_BUTTON_HID_SLEEPF; | |
1070 | break; | |
1071 | } | |
1072 | ||
1073 | /* | |
1074 | * \_SB | |
1075 | * ---- | |
1076 | * Fix for the system root bus device -- the only root-level device. | |
1077 | */ | |
c51a4de8 | 1078 | if (((acpi_handle)parent == ACPI_ROOT_OBJECT) && (type == ACPI_BUS_TYPE_DEVICE)) { |
1da177e4 LT |
1079 | hid = ACPI_BUS_HID; |
1080 | strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME); | |
1081 | strcpy(device->pnp.device_class, ACPI_BUS_CLASS); | |
1082 | } | |
1083 | ||
1084 | if (hid) { | |
1085 | strcpy(device->pnp.hardware_id, hid); | |
1086 | device->flags.hardware_id = 1; | |
1087 | } | |
1088 | if (uid) { | |
1089 | strcpy(device->pnp.unique_id, uid); | |
1090 | device->flags.unique_id = 1; | |
1091 | } | |
3620f2f2 FS |
1092 | if (cid_list || cid_add) { |
1093 | struct acpi_compatible_id_list *list; | |
1094 | int size = 0; | |
1095 | int count = 0; | |
1096 | ||
1097 | if (cid_list) { | |
1098 | size = cid_list->size; | |
1099 | } else if (cid_add) { | |
1100 | size = sizeof(struct acpi_compatible_id_list); | |
1101 | cid_list = ACPI_ALLOCATE_ZEROED((acpi_size) size); | |
1102 | if (!cid_list) { | |
1103 | printk(KERN_ERR "Memory allocation error\n"); | |
1104 | kfree(buffer.pointer); | |
1105 | return; | |
1106 | } else { | |
1107 | cid_list->count = 0; | |
1108 | cid_list->size = size; | |
1109 | } | |
1110 | } | |
1111 | if (cid_add) | |
1112 | size += sizeof(struct acpi_compatible_id); | |
1113 | list = kmalloc(size, GFP_KERNEL); | |
1114 | ||
1115 | if (list) { | |
1116 | if (cid_list) { | |
1117 | memcpy(list, cid_list, cid_list->size); | |
1118 | count = cid_list->count; | |
1119 | } | |
1120 | if (cid_add) { | |
1121 | strncpy(list->id[count].value, cid_add, | |
1122 | ACPI_MAX_CID_LENGTH); | |
1123 | count++; | |
1124 | device->flags.compatible_ids = 1; | |
1125 | } | |
1126 | list->size = size; | |
1127 | list->count = count; | |
1128 | device->pnp.cid_list = list; | |
1129 | } else | |
87ecd5cd | 1130 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
1da177e4 LT |
1131 | } |
1132 | ||
02438d87 | 1133 | kfree(buffer.pointer); |
1da177e4 LT |
1134 | } |
1135 | ||
4be44fcd | 1136 | static int acpi_device_set_context(struct acpi_device *device, int type) |
1da177e4 LT |
1137 | { |
1138 | acpi_status status = AE_OK; | |
1139 | int result = 0; | |
1140 | /* | |
1141 | * Context | |
1142 | * ------- | |
1143 | * Attach this 'struct acpi_device' to the ACPI object. This makes | |
1144 | * resolutions from handle->device very efficient. Note that we need | |
1145 | * to be careful with fixed-feature devices as they all attach to the | |
1146 | * root object. | |
1147 | */ | |
4be44fcd | 1148 | if (type != ACPI_BUS_TYPE_POWER_BUTTON && |
1da177e4 LT |
1149 | type != ACPI_BUS_TYPE_SLEEP_BUTTON) { |
1150 | status = acpi_attach_data(device->handle, | |
4be44fcd | 1151 | acpi_bus_data_handler, device); |
1da177e4 LT |
1152 | |
1153 | if (ACPI_FAILURE(status)) { | |
87ecd5cd | 1154 | printk(KERN_ERR PREFIX "Error attaching device data\n"); |
1da177e4 LT |
1155 | result = -ENODEV; |
1156 | } | |
1157 | } | |
1158 | return result; | |
1159 | } | |
1160 | ||
4be44fcd | 1161 | static int acpi_bus_remove(struct acpi_device *dev, int rmdevice) |
1da177e4 | 1162 | { |
1da177e4 | 1163 | if (!dev) |
d550d98d | 1164 | return -EINVAL; |
1da177e4 | 1165 | |
96333578 | 1166 | dev->removal_type = ACPI_BUS_REMOVAL_EJECT; |
1890a97a | 1167 | device_release_driver(&dev->dev); |
1da177e4 LT |
1168 | |
1169 | if (!rmdevice) | |
d550d98d | 1170 | return 0; |
1da177e4 | 1171 | |
2786f6e3 RZ |
1172 | /* |
1173 | * unbind _ADR-Based Devices when hot removal | |
1174 | */ | |
1da177e4 LT |
1175 | if (dev->flags.bus_address) { |
1176 | if ((dev->parent) && (dev->parent->ops.unbind)) | |
1177 | dev->parent->ops.unbind(dev); | |
1178 | } | |
1da177e4 LT |
1179 | acpi_device_unregister(dev, ACPI_BUS_REMOVAL_EJECT); |
1180 | ||
d550d98d | 1181 | return 0; |
1da177e4 LT |
1182 | } |
1183 | ||
3fb02738 | 1184 | static int |
4be44fcd | 1185 | acpi_add_single_object(struct acpi_device **child, |
c4168bff LS |
1186 | struct acpi_device *parent, acpi_handle handle, int type, |
1187 | struct acpi_bus_ops *ops) | |
1da177e4 | 1188 | { |
4be44fcd LB |
1189 | int result = 0; |
1190 | struct acpi_device *device = NULL; | |
1da177e4 | 1191 | |
1da177e4 LT |
1192 | |
1193 | if (!child) | |
d550d98d | 1194 | return -EINVAL; |
1da177e4 | 1195 | |
36bcbec7 | 1196 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 1197 | if (!device) { |
6468463a | 1198 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 1199 | return -ENOMEM; |
1da177e4 | 1200 | } |
1da177e4 LT |
1201 | |
1202 | device->handle = handle; | |
1203 | device->parent = parent; | |
c4168bff LS |
1204 | device->bus_ops = *ops; /* workround for not call .start */ |
1205 | ||
1da177e4 | 1206 | |
4be44fcd | 1207 | acpi_device_get_busid(device, handle, type); |
1da177e4 LT |
1208 | |
1209 | /* | |
1210 | * Flags | |
1211 | * ----- | |
1212 | * Get prior to calling acpi_bus_get_status() so we know whether | |
1213 | * or not _STA is present. Note that we only look for object | |
1214 | * handles -- cannot evaluate objects until we know the device is | |
1215 | * present and properly initialized. | |
1216 | */ | |
1217 | result = acpi_bus_get_flags(device); | |
1218 | if (result) | |
1219 | goto end; | |
1220 | ||
1221 | /* | |
1222 | * Status | |
1223 | * ------ | |
6940faba KT |
1224 | * See if the device is present. We always assume that non-Device |
1225 | * and non-Processor objects (e.g. thermal zones, power resources, | |
1226 | * etc.) are present, functioning, etc. (at least when parent object | |
1227 | * is present). Note that _STA has a different meaning for some | |
1228 | * objects (e.g. power resources) so we need to be careful how we use | |
1229 | * it. | |
1da177e4 LT |
1230 | */ |
1231 | switch (type) { | |
6940faba | 1232 | case ACPI_BUS_TYPE_PROCESSOR: |
1da177e4 LT |
1233 | case ACPI_BUS_TYPE_DEVICE: |
1234 | result = acpi_bus_get_status(device); | |
3620f2f2 FS |
1235 | if (ACPI_FAILURE(result)) { |
1236 | result = -ENODEV; | |
1da177e4 LT |
1237 | goto end; |
1238 | } | |
39a0ad87 ZY |
1239 | /* |
1240 | * When the device is neither present nor functional, the | |
1241 | * device should not be added to Linux ACPI device tree. | |
1242 | * When the status of the device is not present but functinal, | |
1243 | * it should be added to Linux ACPI tree. For example : bay | |
1244 | * device , dock device. | |
1245 | * In such conditions it is unncessary to check whether it is | |
1246 | * bay device or dock device. | |
1247 | */ | |
1248 | if (!device->status.present && !device->status.functional) { | |
1249 | result = -ENODEV; | |
1250 | goto end; | |
3620f2f2 | 1251 | } |
1da177e4 LT |
1252 | break; |
1253 | default: | |
0c0e8921 BH |
1254 | STRUCT_TO_INT(device->status) = |
1255 | ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | | |
1256 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; | |
1da177e4 LT |
1257 | break; |
1258 | } | |
1259 | ||
1260 | /* | |
1261 | * Initialize Device | |
1262 | * ----------------- | |
1263 | * TBD: Synch with Core's enumeration/initialization process. | |
1264 | */ | |
1265 | ||
1266 | /* | |
1267 | * Hardware ID, Unique ID, & Bus Address | |
1268 | * ------------------------------------- | |
1269 | */ | |
4be44fcd | 1270 | acpi_device_set_id(device, parent, handle, type); |
1da177e4 | 1271 | |
eab4b645 ZY |
1272 | /* |
1273 | * The ACPI device is attached to acpi handle before getting | |
1274 | * the power/wakeup/peformance flags. Otherwise OS can't get | |
1275 | * the corresponding ACPI device by the acpi handle in the course | |
1276 | * of getting the power/wakeup/performance flags. | |
1277 | */ | |
1278 | result = acpi_device_set_context(device, type); | |
1279 | if (result) | |
1280 | goto end; | |
1281 | ||
1da177e4 LT |
1282 | /* |
1283 | * Power Management | |
1284 | * ---------------- | |
1285 | */ | |
1286 | if (device->flags.power_manageable) { | |
1287 | result = acpi_bus_get_power_flags(device); | |
1288 | if (result) | |
1289 | goto end; | |
1290 | } | |
1291 | ||
4be44fcd | 1292 | /* |
1da177e4 LT |
1293 | * Wakeup device management |
1294 | *----------------------- | |
1295 | */ | |
1296 | if (device->flags.wake_capable) { | |
1297 | result = acpi_bus_get_wakeup_device_flags(device); | |
1298 | if (result) | |
1299 | goto end; | |
1300 | } | |
1301 | ||
1302 | /* | |
1303 | * Performance Management | |
1304 | * ---------------------- | |
1305 | */ | |
1306 | if (device->flags.performance_manageable) { | |
1307 | result = acpi_bus_get_perf_flags(device); | |
1308 | if (result) | |
1309 | goto end; | |
1310 | } | |
1311 | ||
1da177e4 | 1312 | |
e49bd2dd | 1313 | result = acpi_device_register(device, parent); |
1da177e4 LT |
1314 | |
1315 | /* | |
2786f6e3 | 1316 | * Bind _ADR-Based Devices when hot add |
1da177e4 LT |
1317 | */ |
1318 | if (device->flags.bus_address) { | |
1319 | if (device->parent && device->parent->ops.bind) | |
1320 | device->parent->ops.bind(device); | |
1321 | } | |
1322 | ||
4be44fcd | 1323 | end: |
1da177e4 LT |
1324 | if (!result) |
1325 | *child = device; | |
1326 | else { | |
6044ec88 | 1327 | kfree(device->pnp.cid_list); |
1da177e4 LT |
1328 | kfree(device); |
1329 | } | |
1330 | ||
d550d98d | 1331 | return result; |
1da177e4 | 1332 | } |
1da177e4 | 1333 | |
4be44fcd | 1334 | static int acpi_bus_scan(struct acpi_device *start, struct acpi_bus_ops *ops) |
1da177e4 | 1335 | { |
4be44fcd LB |
1336 | acpi_status status = AE_OK; |
1337 | struct acpi_device *parent = NULL; | |
1338 | struct acpi_device *child = NULL; | |
1339 | acpi_handle phandle = NULL; | |
1340 | acpi_handle chandle = NULL; | |
1341 | acpi_object_type type = 0; | |
1342 | u32 level = 1; | |
1da177e4 | 1343 | |
1da177e4 LT |
1344 | |
1345 | if (!start) | |
d550d98d | 1346 | return -EINVAL; |
1da177e4 LT |
1347 | |
1348 | parent = start; | |
1349 | phandle = start->handle; | |
4be44fcd | 1350 | |
1da177e4 LT |
1351 | /* |
1352 | * Parse through the ACPI namespace, identify all 'devices', and | |
1353 | * create a new 'struct acpi_device' for each. | |
1354 | */ | |
1355 | while ((level > 0) && parent) { | |
1356 | ||
1357 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, | |
4be44fcd | 1358 | chandle, &chandle); |
1da177e4 LT |
1359 | |
1360 | /* | |
1361 | * If this scope is exhausted then move our way back up. | |
1362 | */ | |
1363 | if (ACPI_FAILURE(status)) { | |
1364 | level--; | |
1365 | chandle = phandle; | |
1366 | acpi_get_parent(phandle, &phandle); | |
1367 | if (parent->parent) | |
1368 | parent = parent->parent; | |
1369 | continue; | |
1370 | } | |
1371 | ||
1372 | status = acpi_get_type(chandle, &type); | |
1373 | if (ACPI_FAILURE(status)) | |
1374 | continue; | |
1375 | ||
1376 | /* | |
1377 | * If this is a scope object then parse it (depth-first). | |
1378 | */ | |
1379 | if (type == ACPI_TYPE_LOCAL_SCOPE) { | |
1380 | level++; | |
1381 | phandle = chandle; | |
1382 | chandle = NULL; | |
1383 | continue; | |
1384 | } | |
1385 | ||
1386 | /* | |
1387 | * We're only interested in objects that we consider 'devices'. | |
1388 | */ | |
1389 | switch (type) { | |
1390 | case ACPI_TYPE_DEVICE: | |
1391 | type = ACPI_BUS_TYPE_DEVICE; | |
1392 | break; | |
1393 | case ACPI_TYPE_PROCESSOR: | |
1394 | type = ACPI_BUS_TYPE_PROCESSOR; | |
1395 | break; | |
1396 | case ACPI_TYPE_THERMAL: | |
1397 | type = ACPI_BUS_TYPE_THERMAL; | |
1398 | break; | |
1399 | case ACPI_TYPE_POWER: | |
1400 | type = ACPI_BUS_TYPE_POWER; | |
1401 | break; | |
1402 | default: | |
1403 | continue; | |
1404 | } | |
1405 | ||
3fb02738 RS |
1406 | if (ops->acpi_op_add) |
1407 | status = acpi_add_single_object(&child, parent, | |
c4168bff | 1408 | chandle, type, ops); |
4be44fcd | 1409 | else |
3fb02738 RS |
1410 | status = acpi_bus_get_device(chandle, &child); |
1411 | ||
4be44fcd LB |
1412 | if (ACPI_FAILURE(status)) |
1413 | continue; | |
3fb02738 | 1414 | |
c4168bff | 1415 | if (ops->acpi_op_start && !(ops->acpi_op_add)) { |
3fb02738 RS |
1416 | status = acpi_start_single_object(child); |
1417 | if (ACPI_FAILURE(status)) | |
1418 | continue; | |
1419 | } | |
1da177e4 LT |
1420 | |
1421 | /* | |
1422 | * If the device is present, enabled, and functioning then | |
1423 | * parse its scope (depth-first). Note that we need to | |
1424 | * represent absent devices to facilitate PnP notifications | |
1425 | * -- but only the subtree head (not all of its children, | |
1426 | * which will be enumerated when the parent is inserted). | |
1427 | * | |
1428 | * TBD: Need notifications and other detection mechanisms | |
4be44fcd | 1429 | * in place before we can fully implement this. |
1da177e4 | 1430 | */ |
39a0ad87 ZY |
1431 | /* |
1432 | * When the device is not present but functional, it is also | |
1433 | * necessary to scan the children of this device. | |
1434 | */ | |
1435 | if (child->status.present || (!child->status.present && | |
1436 | child->status.functional)) { | |
1da177e4 LT |
1437 | status = acpi_get_next_object(ACPI_TYPE_ANY, chandle, |
1438 | NULL, NULL); | |
1439 | if (ACPI_SUCCESS(status)) { | |
1440 | level++; | |
1441 | phandle = chandle; | |
1442 | chandle = NULL; | |
1443 | parent = child; | |
1444 | } | |
1445 | } | |
1446 | } | |
1447 | ||
d550d98d | 1448 | return 0; |
1da177e4 | 1449 | } |
1da177e4 | 1450 | |
3fb02738 | 1451 | int |
4be44fcd LB |
1452 | acpi_bus_add(struct acpi_device **child, |
1453 | struct acpi_device *parent, acpi_handle handle, int type) | |
3fb02738 RS |
1454 | { |
1455 | int result; | |
1456 | struct acpi_bus_ops ops; | |
1457 | ||
c4168bff LS |
1458 | memset(&ops, 0, sizeof(ops)); |
1459 | ops.acpi_op_add = 1; | |
3fb02738 | 1460 | |
c4168bff LS |
1461 | result = acpi_add_single_object(child, parent, handle, type, &ops); |
1462 | if (!result) | |
3fb02738 | 1463 | result = acpi_bus_scan(*child, &ops); |
c4168bff | 1464 | |
d550d98d | 1465 | return result; |
3fb02738 | 1466 | } |
4be44fcd | 1467 | |
3fb02738 RS |
1468 | EXPORT_SYMBOL(acpi_bus_add); |
1469 | ||
4be44fcd | 1470 | int acpi_bus_start(struct acpi_device *device) |
3fb02738 RS |
1471 | { |
1472 | int result; | |
1473 | struct acpi_bus_ops ops; | |
1474 | ||
3fb02738 RS |
1475 | |
1476 | if (!device) | |
d550d98d | 1477 | return -EINVAL; |
3fb02738 RS |
1478 | |
1479 | result = acpi_start_single_object(device); | |
1480 | if (!result) { | |
1481 | memset(&ops, 0, sizeof(ops)); | |
1482 | ops.acpi_op_start = 1; | |
1483 | result = acpi_bus_scan(device, &ops); | |
1484 | } | |
d550d98d | 1485 | return result; |
3fb02738 | 1486 | } |
4be44fcd | 1487 | |
3fb02738 | 1488 | EXPORT_SYMBOL(acpi_bus_start); |
1da177e4 | 1489 | |
ceaba663 | 1490 | int acpi_bus_trim(struct acpi_device *start, int rmdevice) |
1da177e4 | 1491 | { |
4be44fcd LB |
1492 | acpi_status status; |
1493 | struct acpi_device *parent, *child; | |
1494 | acpi_handle phandle, chandle; | |
1495 | acpi_object_type type; | |
1496 | u32 level = 1; | |
1497 | int err = 0; | |
1498 | ||
1499 | parent = start; | |
1da177e4 LT |
1500 | phandle = start->handle; |
1501 | child = chandle = NULL; | |
1502 | ||
1503 | while ((level > 0) && parent && (!err)) { | |
1504 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, | |
4be44fcd | 1505 | chandle, &chandle); |
1da177e4 LT |
1506 | |
1507 | /* | |
1508 | * If this scope is exhausted then move our way back up. | |
1509 | */ | |
1510 | if (ACPI_FAILURE(status)) { | |
1511 | level--; | |
1512 | chandle = phandle; | |
1513 | acpi_get_parent(phandle, &phandle); | |
1514 | child = parent; | |
1515 | parent = parent->parent; | |
1516 | ||
1517 | if (level == 0) | |
1518 | err = acpi_bus_remove(child, rmdevice); | |
1519 | else | |
1520 | err = acpi_bus_remove(child, 1); | |
1521 | ||
1522 | continue; | |
1523 | } | |
1524 | ||
1525 | status = acpi_get_type(chandle, &type); | |
1526 | if (ACPI_FAILURE(status)) { | |
1527 | continue; | |
1528 | } | |
1529 | /* | |
1530 | * If there is a device corresponding to chandle then | |
1531 | * parse it (depth-first). | |
1532 | */ | |
1533 | if (acpi_bus_get_device(chandle, &child) == 0) { | |
1534 | level++; | |
1535 | phandle = chandle; | |
1536 | chandle = NULL; | |
1537 | parent = child; | |
1538 | } | |
1539 | continue; | |
1540 | } | |
1541 | return err; | |
1542 | } | |
ceaba663 KA |
1543 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
1544 | ||
1da177e4 | 1545 | |
4be44fcd | 1546 | static int acpi_bus_scan_fixed(struct acpi_device *root) |
1da177e4 | 1547 | { |
4be44fcd LB |
1548 | int result = 0; |
1549 | struct acpi_device *device = NULL; | |
c4168bff | 1550 | struct acpi_bus_ops ops; |
1da177e4 LT |
1551 | |
1552 | if (!root) | |
d550d98d | 1553 | return -ENODEV; |
1da177e4 | 1554 | |
c4168bff LS |
1555 | memset(&ops, 0, sizeof(ops)); |
1556 | ops.acpi_op_add = 1; | |
1557 | ops.acpi_op_start = 1; | |
1558 | ||
1da177e4 LT |
1559 | /* |
1560 | * Enumerate all fixed-feature devices. | |
1561 | */ | |
cee324b1 | 1562 | if ((acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON) == 0) { |
3fb02738 | 1563 | result = acpi_add_single_object(&device, acpi_root, |
4be44fcd | 1564 | NULL, |
c4168bff LS |
1565 | ACPI_BUS_TYPE_POWER_BUTTON, |
1566 | &ops); | |
3fb02738 | 1567 | } |
1da177e4 | 1568 | |
cee324b1 | 1569 | if ((acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON) == 0) { |
3fb02738 | 1570 | result = acpi_add_single_object(&device, acpi_root, |
4be44fcd | 1571 | NULL, |
c4168bff LS |
1572 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
1573 | &ops); | |
3fb02738 | 1574 | } |
1da177e4 | 1575 | |
d550d98d | 1576 | return result; |
1da177e4 LT |
1577 | } |
1578 | ||
e747f274 | 1579 | int __init acpi_scan_init(void) |
1da177e4 LT |
1580 | { |
1581 | int result; | |
3fb02738 | 1582 | struct acpi_bus_ops ops; |
1da177e4 | 1583 | |
c4168bff LS |
1584 | memset(&ops, 0, sizeof(ops)); |
1585 | ops.acpi_op_add = 1; | |
1586 | ops.acpi_op_start = 1; | |
1da177e4 | 1587 | |
5b327265 PM |
1588 | result = bus_register(&acpi_bus_type); |
1589 | if (result) { | |
1590 | /* We don't want to quit even if we failed to add suspend/resume */ | |
1591 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
1592 | } | |
1593 | ||
1da177e4 LT |
1594 | /* |
1595 | * Create the root device in the bus's device tree | |
1596 | */ | |
3fb02738 | 1597 | result = acpi_add_single_object(&acpi_root, NULL, ACPI_ROOT_OBJECT, |
c4168bff | 1598 | ACPI_BUS_TYPE_SYSTEM, &ops); |
1da177e4 LT |
1599 | if (result) |
1600 | goto Done; | |
1601 | ||
1602 | /* | |
1603 | * Enumerate devices in the ACPI namespace. | |
1604 | */ | |
1605 | result = acpi_bus_scan_fixed(acpi_root); | |
c04209a7 | 1606 | |
c4168bff | 1607 | if (!result) |
3fb02738 | 1608 | result = acpi_bus_scan(acpi_root, &ops); |
1da177e4 LT |
1609 | |
1610 | if (result) | |
1611 | acpi_device_unregister(acpi_root, ACPI_BUS_REMOVAL_NORMAL); | |
1612 | ||
4be44fcd | 1613 | Done: |
d550d98d | 1614 | return result; |
1da177e4 | 1615 | } |