Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * scan.c - support for transforming the ACPI namespace into individual objects | |
3 | */ | |
4 | ||
5 | #include <linux/module.h> | |
6 | #include <linux/init.h> | |
9b6d97b6 | 7 | #include <linux/kernel.h> |
1da177e4 LT |
8 | #include <linux/acpi.h> |
9 | ||
10 | #include <acpi/acpi_drivers.h> | |
11 | #include <acpi/acinterp.h> /* for acpi_ex_eisa_id_to_string() */ | |
12 | ||
1da177e4 | 13 | #define _COMPONENT ACPI_BUS_COMPONENT |
4be44fcd | 14 | ACPI_MODULE_NAME("scan") |
1da177e4 | 15 | #define STRUCT_TO_INT(s) (*((int*)&s)) |
4be44fcd | 16 | extern struct acpi_device *acpi_root; |
1da177e4 LT |
17 | |
18 | #define ACPI_BUS_CLASS "system_bus" | |
19 | #define ACPI_BUS_HID "ACPI_BUS" | |
20 | #define ACPI_BUS_DRIVER_NAME "ACPI Bus Driver" | |
21 | #define ACPI_BUS_DEVICE_NAME "System Bus" | |
22 | ||
23 | static LIST_HEAD(acpi_device_list); | |
24 | DEFINE_SPINLOCK(acpi_device_lock); | |
25 | LIST_HEAD(acpi_wakeup_device_list); | |
26 | ||
4be44fcd | 27 | static int acpi_eject_operation(acpi_handle handle, int lockable) |
1da177e4 LT |
28 | { |
29 | struct acpi_object_list arg_list; | |
30 | union acpi_object arg; | |
31 | acpi_status status = AE_OK; | |
32 | ||
33 | /* | |
34 | * TBD: evaluate _PS3? | |
35 | */ | |
36 | ||
37 | if (lockable) { | |
38 | arg_list.count = 1; | |
39 | arg_list.pointer = &arg; | |
40 | arg.type = ACPI_TYPE_INTEGER; | |
41 | arg.integer.value = 0; | |
42 | acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); | |
43 | } | |
44 | ||
45 | arg_list.count = 1; | |
46 | arg_list.pointer = &arg; | |
47 | arg.type = ACPI_TYPE_INTEGER; | |
48 | arg.integer.value = 1; | |
49 | ||
50 | /* | |
51 | * TBD: _EJD support. | |
52 | */ | |
53 | ||
54 | status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); | |
55 | if (ACPI_FAILURE(status)) { | |
4be44fcd | 56 | return (-ENODEV); |
1da177e4 LT |
57 | } |
58 | ||
4be44fcd | 59 | return (0); |
1da177e4 LT |
60 | } |
61 | ||
1da177e4 | 62 | static ssize_t |
f883d9db PM |
63 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
64 | const char *buf, size_t count) | |
1da177e4 | 65 | { |
4be44fcd LB |
66 | int result; |
67 | int ret = count; | |
68 | int islockable; | |
69 | acpi_status status; | |
70 | acpi_handle handle; | |
71 | acpi_object_type type = 0; | |
f883d9db | 72 | struct acpi_device *acpi_device = to_acpi_device(d); |
1da177e4 LT |
73 | |
74 | if ((!count) || (buf[0] != '1')) { | |
75 | return -EINVAL; | |
76 | } | |
1da177e4 | 77 | #ifndef FORCE_EJECT |
f883d9db | 78 | if (acpi_device->driver == NULL) { |
1da177e4 LT |
79 | ret = -ENODEV; |
80 | goto err; | |
81 | } | |
82 | #endif | |
f883d9db PM |
83 | status = acpi_get_type(acpi_device->handle, &type); |
84 | if (ACPI_FAILURE(status) || (!acpi_device->flags.ejectable)) { | |
1da177e4 LT |
85 | ret = -ENODEV; |
86 | goto err; | |
87 | } | |
88 | ||
f883d9db PM |
89 | islockable = acpi_device->flags.lockable; |
90 | handle = acpi_device->handle; | |
1da177e4 | 91 | |
f883d9db | 92 | result = acpi_bus_trim(acpi_device, 1); |
1da177e4 LT |
93 | |
94 | if (!result) | |
95 | result = acpi_eject_operation(handle, islockable); | |
96 | ||
97 | if (result) { | |
98 | ret = -EBUSY; | |
99 | } | |
4be44fcd | 100 | err: |
1da177e4 LT |
101 | return ret; |
102 | } | |
103 | ||
f883d9db PM |
104 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
105 | ||
106 | static void acpi_device_setup_files(struct acpi_device *dev) | |
107 | { | |
108 | acpi_status status; | |
109 | acpi_handle temp; | |
110 | ||
111 | /* | |
112 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
113 | * hot-removal function from userland. | |
114 | */ | |
115 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); | |
116 | if (ACPI_SUCCESS(status)) | |
117 | device_create_file(&dev->dev, &dev_attr_eject); | |
118 | } | |
119 | ||
120 | static void acpi_device_remove_files(struct acpi_device *dev) | |
121 | { | |
122 | acpi_status status; | |
123 | acpi_handle temp; | |
124 | ||
125 | /* | |
126 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
127 | * hot-removal function from userland. | |
128 | */ | |
129 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); | |
130 | if (ACPI_SUCCESS(status)) | |
131 | device_remove_file(&dev->dev, &dev_attr_eject); | |
132 | } | |
1da177e4 | 133 | /* -------------------------------------------------------------------------- |
9e89dde2 | 134 | ACPI Bus operations |
1da177e4 | 135 | -------------------------------------------------------------------------- */ |
1890a97a PM |
136 | static void acpi_device_release(struct device *dev) |
137 | { | |
138 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
139 | ||
140 | kfree(acpi_dev->pnp.cid_list); | |
141 | kfree(acpi_dev); | |
142 | } | |
143 | ||
5d9464a4 | 144 | static int acpi_device_suspend(struct device *dev, pm_message_t state) |
1da177e4 | 145 | { |
5d9464a4 PM |
146 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
147 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
9e89dde2 | 148 | |
5d9464a4 PM |
149 | if (acpi_drv && acpi_drv->ops.suspend) |
150 | return acpi_drv->ops.suspend(acpi_dev, state); | |
1da177e4 LT |
151 | return 0; |
152 | } | |
153 | ||
5d9464a4 | 154 | static int acpi_device_resume(struct device *dev) |
9e89dde2 | 155 | { |
5d9464a4 PM |
156 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
157 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
1da177e4 | 158 | |
5d9464a4 PM |
159 | if (acpi_drv && acpi_drv->ops.resume) |
160 | return acpi_drv->ops.resume(acpi_dev); | |
9e89dde2 ZR |
161 | return 0; |
162 | } | |
163 | ||
5d9464a4 | 164 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 165 | { |
5d9464a4 PM |
166 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
167 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
9e89dde2 | 168 | |
5d9464a4 PM |
169 | if (acpi_drv->ops.match) |
170 | return !acpi_drv->ops.match(acpi_dev, acpi_drv); | |
171 | return !acpi_match_ids(acpi_dev, acpi_drv->ids); | |
172 | } | |
173 | ||
174 | static int acpi_device_uevent(struct device *dev, char **envp, int num_envp, | |
175 | char *buffer, int buffer_size) | |
176 | { | |
177 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
178 | int i = 0, length = 0, ret = 0; | |
179 | ||
180 | if (acpi_dev->flags.hardware_id) | |
181 | ret = add_uevent_var(envp, num_envp, &i, | |
182 | buffer, buffer_size, &length, | |
183 | "HWID=%s", acpi_dev->pnp.hardware_id); | |
184 | if (ret) | |
185 | return -ENOMEM; | |
186 | if (acpi_dev->flags.compatible_ids) { | |
187 | int j; | |
188 | struct acpi_compatible_id_list *cid_list; | |
189 | ||
190 | cid_list = acpi_dev->pnp.cid_list; | |
191 | ||
192 | for (j = 0; j < cid_list->count; j++) { | |
193 | ret = add_uevent_var(envp, num_envp, &i, buffer, | |
194 | buffer_size, &length, "COMPTID=%s", | |
195 | cid_list->id[j].value); | |
196 | if (ret) | |
197 | return -ENOMEM; | |
9e89dde2 ZR |
198 | } |
199 | } | |
5d9464a4 PM |
200 | |
201 | envp[i] = NULL; | |
9e89dde2 ZR |
202 | return 0; |
203 | } | |
204 | ||
5d9464a4 PM |
205 | static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *); |
206 | static int acpi_start_single_object(struct acpi_device *); | |
207 | static int acpi_device_probe(struct device * dev) | |
9e89dde2 | 208 | { |
5d9464a4 PM |
209 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
210 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
211 | int ret; | |
212 | ||
213 | ret = acpi_bus_driver_init(acpi_dev, acpi_drv); | |
214 | if (!ret) { | |
c4168bff LS |
215 | if (acpi_dev->bus_ops.acpi_op_start) |
216 | acpi_start_single_object(acpi_dev); | |
5d9464a4 PM |
217 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
218 | "Found driver [%s] for device [%s]\n", | |
219 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
220 | get_device(dev); | |
221 | } | |
222 | return ret; | |
223 | } | |
9e89dde2 | 224 | |
5d9464a4 PM |
225 | static int acpi_device_remove(struct device * dev) |
226 | { | |
227 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
228 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
229 | ||
230 | if (acpi_drv) { | |
231 | if (acpi_drv->ops.stop) | |
96333578 | 232 | acpi_drv->ops.stop(acpi_dev, acpi_dev->removal_type); |
5d9464a4 | 233 | if (acpi_drv->ops.remove) |
96333578 | 234 | acpi_drv->ops.remove(acpi_dev, acpi_dev->removal_type); |
5d9464a4 PM |
235 | } |
236 | acpi_dev->driver = NULL; | |
237 | acpi_driver_data(dev) = NULL; | |
238 | ||
239 | put_device(dev); | |
9e89dde2 ZR |
240 | return 0; |
241 | } | |
1da177e4 | 242 | |
5d9464a4 | 243 | static void acpi_device_shutdown(struct device *dev) |
1da177e4 | 244 | { |
5d9464a4 PM |
245 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
246 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
247 | ||
248 | if (acpi_drv && acpi_drv->ops.shutdown) | |
249 | acpi_drv->ops.shutdown(acpi_dev); | |
250 | ||
251 | return ; | |
1da177e4 LT |
252 | } |
253 | ||
9e89dde2 ZR |
254 | static struct bus_type acpi_bus_type = { |
255 | .name = "acpi", | |
256 | .suspend = acpi_device_suspend, | |
257 | .resume = acpi_device_resume, | |
5d9464a4 PM |
258 | .shutdown = acpi_device_shutdown, |
259 | .match = acpi_bus_match, | |
260 | .probe = acpi_device_probe, | |
261 | .remove = acpi_device_remove, | |
262 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
263 | }; |
264 | ||
265 | static void acpi_device_register(struct acpi_device *device, | |
266 | struct acpi_device *parent) | |
267 | { | |
9e89dde2 ZR |
268 | /* |
269 | * Linkage | |
270 | * ------- | |
271 | * Link this device to its parent and siblings. | |
272 | */ | |
273 | INIT_LIST_HEAD(&device->children); | |
274 | INIT_LIST_HEAD(&device->node); | |
275 | INIT_LIST_HEAD(&device->g_list); | |
276 | INIT_LIST_HEAD(&device->wakeup_list); | |
277 | ||
278 | spin_lock(&acpi_device_lock); | |
279 | if (device->parent) { | |
280 | list_add_tail(&device->node, &device->parent->children); | |
281 | list_add_tail(&device->g_list, &device->parent->g_list); | |
282 | } else | |
283 | list_add_tail(&device->g_list, &acpi_device_list); | |
284 | if (device->wakeup.flags.valid) | |
285 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
286 | spin_unlock(&acpi_device_lock); | |
287 | ||
1890a97a PM |
288 | if (device->parent) |
289 | device->dev.parent = &parent->dev; | |
290 | device->dev.bus = &acpi_bus_type; | |
291 | device_initialize(&device->dev); | |
292 | sprintf(device->dev.bus_id, "%s", device->pnp.bus_id); | |
293 | device->dev.release = &acpi_device_release; | |
294 | device_add(&device->dev); | |
f883d9db PM |
295 | |
296 | acpi_device_setup_files(device); | |
96333578 | 297 | device->removal_type = ACPI_BUS_REMOVAL_NORMAL; |
9e89dde2 ZR |
298 | } |
299 | ||
300 | static void acpi_device_unregister(struct acpi_device *device, int type) | |
301 | { | |
302 | spin_lock(&acpi_device_lock); | |
303 | if (device->parent) { | |
304 | list_del(&device->node); | |
305 | list_del(&device->g_list); | |
306 | } else | |
307 | list_del(&device->g_list); | |
308 | ||
309 | list_del(&device->wakeup_list); | |
9e89dde2 ZR |
310 | spin_unlock(&acpi_device_lock); |
311 | ||
312 | acpi_detach_data(device->handle, acpi_bus_data_handler); | |
1890a97a | 313 | |
f883d9db | 314 | acpi_device_remove_files(device); |
1890a97a | 315 | device_unregister(&device->dev); |
9e89dde2 ZR |
316 | } |
317 | ||
318 | /* -------------------------------------------------------------------------- | |
319 | Driver Management | |
320 | -------------------------------------------------------------------------- */ | |
1da177e4 | 321 | /** |
d758a8fa RD |
322 | * acpi_bus_driver_init - add a device to a driver |
323 | * @device: the device to add and initialize | |
324 | * @driver: driver for the device | |
325 | * | |
1da177e4 | 326 | * Used to initialize a device via its device driver. Called whenever a |
1890a97a | 327 | * driver is bound to a device. Invokes the driver's add() ops. |
1da177e4 LT |
328 | */ |
329 | static int | |
4be44fcd | 330 | acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) |
1da177e4 | 331 | { |
4be44fcd | 332 | int result = 0; |
1da177e4 | 333 | |
1da177e4 LT |
334 | |
335 | if (!device || !driver) | |
d550d98d | 336 | return -EINVAL; |
1da177e4 LT |
337 | |
338 | if (!driver->ops.add) | |
d550d98d | 339 | return -ENOSYS; |
1da177e4 LT |
340 | |
341 | result = driver->ops.add(device); | |
342 | if (result) { | |
343 | device->driver = NULL; | |
344 | acpi_driver_data(device) = NULL; | |
d550d98d | 345 | return result; |
1da177e4 LT |
346 | } |
347 | ||
348 | device->driver = driver; | |
349 | ||
350 | /* | |
351 | * TBD - Configuration Management: Assign resources to device based | |
352 | * upon possible configuration and currently allocated resources. | |
353 | */ | |
354 | ||
4be44fcd LB |
355 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
356 | "Driver successfully bound to device\n")); | |
d550d98d | 357 | return 0; |
3fb02738 RS |
358 | } |
359 | ||
8713cbef | 360 | static int acpi_start_single_object(struct acpi_device *device) |
3fb02738 RS |
361 | { |
362 | int result = 0; | |
363 | struct acpi_driver *driver; | |
364 | ||
3fb02738 RS |
365 | |
366 | if (!(driver = device->driver)) | |
d550d98d | 367 | return 0; |
3fb02738 | 368 | |
1da177e4 LT |
369 | if (driver->ops.start) { |
370 | result = driver->ops.start(device); | |
371 | if (result && driver->ops.remove) | |
372 | driver->ops.remove(device, ACPI_BUS_REMOVAL_NORMAL); | |
1da177e4 LT |
373 | } |
374 | ||
d550d98d | 375 | return result; |
1da177e4 LT |
376 | } |
377 | ||
9e89dde2 ZR |
378 | /** |
379 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
380 | * @driver: driver being registered | |
381 | * | |
382 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
383 | * devices that match the driver's criteria and binds. Returns zero for | |
384 | * success or a negative error status for failure. | |
385 | */ | |
386 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
387 | { | |
1890a97a | 388 | int ret; |
9e89dde2 ZR |
389 | |
390 | if (acpi_disabled) | |
391 | return -ENODEV; | |
1890a97a PM |
392 | driver->drv.name = driver->name; |
393 | driver->drv.bus = &acpi_bus_type; | |
394 | driver->drv.owner = driver->owner; | |
9e89dde2 | 395 | |
1890a97a PM |
396 | ret = driver_register(&driver->drv); |
397 | return ret; | |
9e89dde2 ZR |
398 | } |
399 | ||
400 | EXPORT_SYMBOL(acpi_bus_register_driver); | |
401 | ||
402 | /** | |
403 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus | |
404 | * @driver: driver to unregister | |
405 | * | |
406 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
407 | * devices that match the driver's criteria and unbinds. | |
408 | */ | |
409 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
410 | { | |
1890a97a | 411 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
412 | } |
413 | ||
414 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
415 | ||
9e89dde2 ZR |
416 | /* -------------------------------------------------------------------------- |
417 | Device Enumeration | |
418 | -------------------------------------------------------------------------- */ | |
419 | acpi_status | |
420 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
421 | { | |
422 | acpi_status status; | |
423 | acpi_handle tmp; | |
424 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
425 | union acpi_object *obj; | |
426 | ||
427 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
428 | if (ACPI_FAILURE(status)) | |
429 | return status; | |
430 | ||
431 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
432 | if (ACPI_SUCCESS(status)) { | |
433 | obj = buffer.pointer; | |
434 | status = acpi_get_handle(NULL, obj->string.pointer, ejd); | |
435 | kfree(buffer.pointer); | |
436 | } | |
437 | return status; | |
438 | } | |
439 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
440 | ||
441 | void acpi_bus_data_handler(acpi_handle handle, u32 function, void *context) | |
442 | { | |
443 | ||
444 | /* TBD */ | |
445 | ||
446 | return; | |
447 | } | |
448 | ||
449 | int acpi_match_ids(struct acpi_device *device, char *ids) | |
450 | { | |
451 | if (device->flags.hardware_id) | |
452 | if (strstr(ids, device->pnp.hardware_id)) | |
453 | return 0; | |
454 | ||
455 | if (device->flags.compatible_ids) { | |
456 | struct acpi_compatible_id_list *cid_list = device->pnp.cid_list; | |
457 | int i; | |
458 | ||
459 | /* compare multiple _CID entries against driver ids */ | |
460 | for (i = 0; i < cid_list->count; i++) { | |
461 | if (strstr(ids, cid_list->id[i].value)) | |
462 | return 0; | |
463 | } | |
464 | } | |
465 | return -ENOENT; | |
466 | } | |
467 | ||
468 | static int acpi_bus_get_perf_flags(struct acpi_device *device) | |
469 | { | |
470 | device->performance.state = ACPI_STATE_UNKNOWN; | |
471 | return 0; | |
472 | } | |
473 | ||
474 | static acpi_status | |
475 | acpi_bus_extract_wakeup_device_power_package(struct acpi_device *device, | |
476 | union acpi_object *package) | |
477 | { | |
478 | int i = 0; | |
479 | union acpi_object *element = NULL; | |
480 | ||
481 | if (!device || !package || (package->package.count < 2)) | |
482 | return AE_BAD_PARAMETER; | |
483 | ||
484 | element = &(package->package.elements[0]); | |
485 | if (!element) | |
486 | return AE_BAD_PARAMETER; | |
487 | if (element->type == ACPI_TYPE_PACKAGE) { | |
488 | if ((element->package.count < 2) || | |
489 | (element->package.elements[0].type != | |
490 | ACPI_TYPE_LOCAL_REFERENCE) | |
491 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) | |
492 | return AE_BAD_DATA; | |
493 | device->wakeup.gpe_device = | |
494 | element->package.elements[0].reference.handle; | |
495 | device->wakeup.gpe_number = | |
496 | (u32) element->package.elements[1].integer.value; | |
497 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
498 | device->wakeup.gpe_number = element->integer.value; | |
499 | } else | |
500 | return AE_BAD_DATA; | |
501 | ||
502 | element = &(package->package.elements[1]); | |
503 | if (element->type != ACPI_TYPE_INTEGER) { | |
504 | return AE_BAD_DATA; | |
505 | } | |
506 | device->wakeup.sleep_state = element->integer.value; | |
507 | ||
508 | if ((package->package.count - 2) > ACPI_MAX_HANDLES) { | |
509 | return AE_NO_MEMORY; | |
510 | } | |
511 | device->wakeup.resources.count = package->package.count - 2; | |
512 | for (i = 0; i < device->wakeup.resources.count; i++) { | |
513 | element = &(package->package.elements[i + 2]); | |
514 | if (element->type != ACPI_TYPE_ANY) { | |
515 | return AE_BAD_DATA; | |
516 | } | |
517 | ||
518 | device->wakeup.resources.handles[i] = element->reference.handle; | |
519 | } | |
520 | ||
521 | return AE_OK; | |
1da177e4 LT |
522 | } |
523 | ||
9e89dde2 | 524 | static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
1da177e4 | 525 | { |
9e89dde2 ZR |
526 | acpi_status status = 0; |
527 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
528 | union acpi_object *package = NULL; | |
1da177e4 | 529 | |
1da177e4 | 530 | |
9e89dde2 ZR |
531 | /* _PRW */ |
532 | status = acpi_evaluate_object(device->handle, "_PRW", NULL, &buffer); | |
533 | if (ACPI_FAILURE(status)) { | |
534 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
535 | goto end; | |
536 | } | |
1da177e4 | 537 | |
9e89dde2 ZR |
538 | package = (union acpi_object *)buffer.pointer; |
539 | status = acpi_bus_extract_wakeup_device_power_package(device, package); | |
540 | if (ACPI_FAILURE(status)) { | |
541 | ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package")); | |
542 | goto end; | |
543 | } | |
1da177e4 | 544 | |
9e89dde2 | 545 | kfree(buffer.pointer); |
1da177e4 | 546 | |
9e89dde2 ZR |
547 | device->wakeup.flags.valid = 1; |
548 | /* Power button, Lid switch always enable wakeup */ | |
549 | if (!acpi_match_ids(device, "PNP0C0D,PNP0C0C,PNP0C0E")) | |
550 | device->wakeup.flags.run_wake = 1; | |
1a365616 | 551 | |
9e89dde2 ZR |
552 | end: |
553 | if (ACPI_FAILURE(status)) | |
554 | device->flags.wake_capable = 0; | |
555 | return 0; | |
1da177e4 | 556 | } |
4be44fcd | 557 | |
9e89dde2 | 558 | static int acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 559 | { |
9e89dde2 ZR |
560 | acpi_status status = 0; |
561 | acpi_handle handle = NULL; | |
562 | u32 i = 0; | |
1da177e4 | 563 | |
1da177e4 | 564 | |
9e89dde2 ZR |
565 | /* |
566 | * Power Management Flags | |
567 | */ | |
568 | status = acpi_get_handle(device->handle, "_PSC", &handle); | |
569 | if (ACPI_SUCCESS(status)) | |
570 | device->power.flags.explicit_get = 1; | |
571 | status = acpi_get_handle(device->handle, "_IRC", &handle); | |
572 | if (ACPI_SUCCESS(status)) | |
573 | device->power.flags.inrush_current = 1; | |
1da177e4 | 574 | |
9e89dde2 ZR |
575 | /* |
576 | * Enumerate supported power management states | |
577 | */ | |
578 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3; i++) { | |
579 | struct acpi_device_power_state *ps = &device->power.states[i]; | |
580 | char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' }; | |
581 | ||
582 | /* Evaluate "_PRx" to se if power resources are referenced */ | |
583 | acpi_evaluate_reference(device->handle, object_name, NULL, | |
584 | &ps->resources); | |
585 | if (ps->resources.count) { | |
586 | device->power.flags.power_resources = 1; | |
587 | ps->flags.valid = 1; | |
1da177e4 | 588 | } |
1da177e4 | 589 | |
9e89dde2 ZR |
590 | /* Evaluate "_PSx" to see if we can do explicit sets */ |
591 | object_name[2] = 'S'; | |
592 | status = acpi_get_handle(device->handle, object_name, &handle); | |
593 | if (ACPI_SUCCESS(status)) { | |
594 | ps->flags.explicit_set = 1; | |
595 | ps->flags.valid = 1; | |
596 | } | |
1da177e4 | 597 | |
9e89dde2 ZR |
598 | /* State is valid if we have some power control */ |
599 | if (ps->resources.count || ps->flags.explicit_set) | |
600 | ps->flags.valid = 1; | |
1da177e4 | 601 | |
9e89dde2 ZR |
602 | ps->power = -1; /* Unknown - driver assigned */ |
603 | ps->latency = -1; /* Unknown - driver assigned */ | |
604 | } | |
c8f7a62c | 605 | |
9e89dde2 ZR |
606 | /* Set defaults for D0 and D3 states (always valid) */ |
607 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
608 | device->power.states[ACPI_STATE_D0].power = 100; | |
609 | device->power.states[ACPI_STATE_D3].flags.valid = 1; | |
610 | device->power.states[ACPI_STATE_D3].power = 0; | |
c8f7a62c | 611 | |
9e89dde2 ZR |
612 | /* TBD: System wake support and resource requirements. */ |
613 | ||
614 | device->power.state = ACPI_STATE_UNKNOWN; | |
c8f7a62c | 615 | |
9e89dde2 ZR |
616 | return 0; |
617 | } | |
c8f7a62c | 618 | |
4be44fcd | 619 | static int acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 620 | { |
4be44fcd LB |
621 | acpi_status status = AE_OK; |
622 | acpi_handle temp = NULL; | |
1da177e4 | 623 | |
1da177e4 LT |
624 | |
625 | /* Presence of _STA indicates 'dynamic_status' */ | |
626 | status = acpi_get_handle(device->handle, "_STA", &temp); | |
627 | if (ACPI_SUCCESS(status)) | |
628 | device->flags.dynamic_status = 1; | |
629 | ||
630 | /* Presence of _CID indicates 'compatible_ids' */ | |
631 | status = acpi_get_handle(device->handle, "_CID", &temp); | |
632 | if (ACPI_SUCCESS(status)) | |
633 | device->flags.compatible_ids = 1; | |
634 | ||
635 | /* Presence of _RMV indicates 'removable' */ | |
636 | status = acpi_get_handle(device->handle, "_RMV", &temp); | |
637 | if (ACPI_SUCCESS(status)) | |
638 | device->flags.removable = 1; | |
639 | ||
640 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
641 | status = acpi_get_handle(device->handle, "_EJD", &temp); | |
642 | if (ACPI_SUCCESS(status)) | |
643 | device->flags.ejectable = 1; | |
644 | else { | |
645 | status = acpi_get_handle(device->handle, "_EJ0", &temp); | |
646 | if (ACPI_SUCCESS(status)) | |
647 | device->flags.ejectable = 1; | |
648 | } | |
649 | ||
650 | /* Presence of _LCK indicates 'lockable' */ | |
651 | status = acpi_get_handle(device->handle, "_LCK", &temp); | |
652 | if (ACPI_SUCCESS(status)) | |
653 | device->flags.lockable = 1; | |
654 | ||
655 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ | |
656 | status = acpi_get_handle(device->handle, "_PS0", &temp); | |
657 | if (ACPI_FAILURE(status)) | |
658 | status = acpi_get_handle(device->handle, "_PR0", &temp); | |
659 | if (ACPI_SUCCESS(status)) | |
660 | device->flags.power_manageable = 1; | |
661 | ||
662 | /* Presence of _PRW indicates wake capable */ | |
663 | status = acpi_get_handle(device->handle, "_PRW", &temp); | |
664 | if (ACPI_SUCCESS(status)) | |
665 | device->flags.wake_capable = 1; | |
666 | ||
667 | /* TBD: Peformance management */ | |
668 | ||
d550d98d | 669 | return 0; |
1da177e4 LT |
670 | } |
671 | ||
4be44fcd LB |
672 | static void acpi_device_get_busid(struct acpi_device *device, |
673 | acpi_handle handle, int type) | |
1da177e4 | 674 | { |
4be44fcd LB |
675 | char bus_id[5] = { '?', 0 }; |
676 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
677 | int i = 0; | |
1da177e4 LT |
678 | |
679 | /* | |
680 | * Bus ID | |
681 | * ------ | |
682 | * The device's Bus ID is simply the object name. | |
683 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
684 | */ | |
685 | switch (type) { | |
686 | case ACPI_BUS_TYPE_SYSTEM: | |
687 | strcpy(device->pnp.bus_id, "ACPI"); | |
688 | break; | |
689 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
690 | strcpy(device->pnp.bus_id, "PWRF"); | |
691 | break; | |
692 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
693 | strcpy(device->pnp.bus_id, "SLPF"); | |
694 | break; | |
695 | default: | |
696 | acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer); | |
697 | /* Clean up trailing underscores (if any) */ | |
698 | for (i = 3; i > 1; i--) { | |
699 | if (bus_id[i] == '_') | |
700 | bus_id[i] = '\0'; | |
701 | else | |
702 | break; | |
703 | } | |
704 | strcpy(device->pnp.bus_id, bus_id); | |
705 | break; | |
706 | } | |
707 | } | |
708 | ||
4be44fcd LB |
709 | static void acpi_device_set_id(struct acpi_device *device, |
710 | struct acpi_device *parent, acpi_handle handle, | |
711 | int type) | |
1da177e4 | 712 | { |
4be44fcd LB |
713 | struct acpi_device_info *info; |
714 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
715 | char *hid = NULL; | |
716 | char *uid = NULL; | |
1da177e4 | 717 | struct acpi_compatible_id_list *cid_list = NULL; |
4be44fcd | 718 | acpi_status status; |
1da177e4 LT |
719 | |
720 | switch (type) { | |
721 | case ACPI_BUS_TYPE_DEVICE: | |
722 | status = acpi_get_object_info(handle, &buffer); | |
723 | if (ACPI_FAILURE(status)) { | |
4be44fcd | 724 | printk("%s: Error reading device info\n", __FUNCTION__); |
1da177e4 LT |
725 | return; |
726 | } | |
727 | ||
728 | info = buffer.pointer; | |
729 | if (info->valid & ACPI_VALID_HID) | |
730 | hid = info->hardware_id.value; | |
731 | if (info->valid & ACPI_VALID_UID) | |
732 | uid = info->unique_id.value; | |
733 | if (info->valid & ACPI_VALID_CID) | |
734 | cid_list = &info->compatibility_id; | |
735 | if (info->valid & ACPI_VALID_ADR) { | |
736 | device->pnp.bus_address = info->address; | |
737 | device->flags.bus_address = 1; | |
738 | } | |
739 | break; | |
740 | case ACPI_BUS_TYPE_POWER: | |
741 | hid = ACPI_POWER_HID; | |
742 | break; | |
743 | case ACPI_BUS_TYPE_PROCESSOR: | |
744 | hid = ACPI_PROCESSOR_HID; | |
745 | break; | |
746 | case ACPI_BUS_TYPE_SYSTEM: | |
747 | hid = ACPI_SYSTEM_HID; | |
748 | break; | |
749 | case ACPI_BUS_TYPE_THERMAL: | |
750 | hid = ACPI_THERMAL_HID; | |
751 | break; | |
752 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
753 | hid = ACPI_BUTTON_HID_POWERF; | |
754 | break; | |
755 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
756 | hid = ACPI_BUTTON_HID_SLEEPF; | |
757 | break; | |
758 | } | |
759 | ||
760 | /* | |
761 | * \_SB | |
762 | * ---- | |
763 | * Fix for the system root bus device -- the only root-level device. | |
764 | */ | |
c51a4de8 | 765 | if (((acpi_handle)parent == ACPI_ROOT_OBJECT) && (type == ACPI_BUS_TYPE_DEVICE)) { |
1da177e4 LT |
766 | hid = ACPI_BUS_HID; |
767 | strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME); | |
768 | strcpy(device->pnp.device_class, ACPI_BUS_CLASS); | |
769 | } | |
770 | ||
771 | if (hid) { | |
772 | strcpy(device->pnp.hardware_id, hid); | |
773 | device->flags.hardware_id = 1; | |
774 | } | |
775 | if (uid) { | |
776 | strcpy(device->pnp.unique_id, uid); | |
777 | device->flags.unique_id = 1; | |
778 | } | |
779 | if (cid_list) { | |
780 | device->pnp.cid_list = kmalloc(cid_list->size, GFP_KERNEL); | |
781 | if (device->pnp.cid_list) | |
782 | memcpy(device->pnp.cid_list, cid_list, cid_list->size); | |
783 | else | |
784 | printk(KERN_ERR "Memory allocation error\n"); | |
785 | } | |
786 | ||
02438d87 | 787 | kfree(buffer.pointer); |
1da177e4 LT |
788 | } |
789 | ||
4be44fcd | 790 | static int acpi_device_set_context(struct acpi_device *device, int type) |
1da177e4 LT |
791 | { |
792 | acpi_status status = AE_OK; | |
793 | int result = 0; | |
794 | /* | |
795 | * Context | |
796 | * ------- | |
797 | * Attach this 'struct acpi_device' to the ACPI object. This makes | |
798 | * resolutions from handle->device very efficient. Note that we need | |
799 | * to be careful with fixed-feature devices as they all attach to the | |
800 | * root object. | |
801 | */ | |
4be44fcd | 802 | if (type != ACPI_BUS_TYPE_POWER_BUTTON && |
1da177e4 LT |
803 | type != ACPI_BUS_TYPE_SLEEP_BUTTON) { |
804 | status = acpi_attach_data(device->handle, | |
4be44fcd | 805 | acpi_bus_data_handler, device); |
1da177e4 LT |
806 | |
807 | if (ACPI_FAILURE(status)) { | |
808 | printk("Error attaching device data\n"); | |
809 | result = -ENODEV; | |
810 | } | |
811 | } | |
812 | return result; | |
813 | } | |
814 | ||
4be44fcd LB |
815 | static void acpi_device_get_debug_info(struct acpi_device *device, |
816 | acpi_handle handle, int type) | |
1da177e4 LT |
817 | { |
818 | #ifdef CONFIG_ACPI_DEBUG_OUTPUT | |
4be44fcd LB |
819 | char *type_string = NULL; |
820 | char name[80] = { '?', '\0' }; | |
821 | struct acpi_buffer buffer = { sizeof(name), name }; | |
1da177e4 LT |
822 | |
823 | switch (type) { | |
824 | case ACPI_BUS_TYPE_DEVICE: | |
825 | type_string = "Device"; | |
826 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
827 | break; | |
828 | case ACPI_BUS_TYPE_POWER: | |
829 | type_string = "Power Resource"; | |
830 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
831 | break; | |
832 | case ACPI_BUS_TYPE_PROCESSOR: | |
833 | type_string = "Processor"; | |
834 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
835 | break; | |
836 | case ACPI_BUS_TYPE_SYSTEM: | |
837 | type_string = "System"; | |
838 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
839 | break; | |
840 | case ACPI_BUS_TYPE_THERMAL: | |
841 | type_string = "Thermal Zone"; | |
842 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
843 | break; | |
844 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
845 | type_string = "Power Button"; | |
846 | sprintf(name, "PWRB"); | |
847 | break; | |
848 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
849 | type_string = "Sleep Button"; | |
850 | sprintf(name, "SLPB"); | |
851 | break; | |
852 | } | |
853 | ||
854 | printk(KERN_DEBUG "Found %s %s [%p]\n", type_string, name, handle); | |
4be44fcd | 855 | #endif /*CONFIG_ACPI_DEBUG_OUTPUT */ |
1da177e4 LT |
856 | } |
857 | ||
4be44fcd | 858 | static int acpi_bus_remove(struct acpi_device *dev, int rmdevice) |
1da177e4 | 859 | { |
1da177e4 | 860 | if (!dev) |
d550d98d | 861 | return -EINVAL; |
1da177e4 | 862 | |
96333578 | 863 | dev->removal_type = ACPI_BUS_REMOVAL_EJECT; |
1890a97a | 864 | device_release_driver(&dev->dev); |
1da177e4 LT |
865 | |
866 | if (!rmdevice) | |
d550d98d | 867 | return 0; |
1da177e4 | 868 | |
1da177e4 LT |
869 | acpi_device_unregister(dev, ACPI_BUS_REMOVAL_EJECT); |
870 | ||
d550d98d | 871 | return 0; |
1da177e4 LT |
872 | } |
873 | ||
3fb02738 | 874 | static int |
4be44fcd | 875 | acpi_add_single_object(struct acpi_device **child, |
c4168bff LS |
876 | struct acpi_device *parent, acpi_handle handle, int type, |
877 | struct acpi_bus_ops *ops) | |
1da177e4 | 878 | { |
4be44fcd LB |
879 | int result = 0; |
880 | struct acpi_device *device = NULL; | |
1da177e4 | 881 | |
1da177e4 LT |
882 | |
883 | if (!child) | |
d550d98d | 884 | return -EINVAL; |
1da177e4 LT |
885 | |
886 | device = kmalloc(sizeof(struct acpi_device), GFP_KERNEL); | |
887 | if (!device) { | |
6468463a | 888 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 889 | return -ENOMEM; |
1da177e4 LT |
890 | } |
891 | memset(device, 0, sizeof(struct acpi_device)); | |
892 | ||
893 | device->handle = handle; | |
894 | device->parent = parent; | |
c4168bff LS |
895 | device->bus_ops = *ops; /* workround for not call .start */ |
896 | ||
1da177e4 | 897 | |
4be44fcd | 898 | acpi_device_get_busid(device, handle, type); |
1da177e4 LT |
899 | |
900 | /* | |
901 | * Flags | |
902 | * ----- | |
903 | * Get prior to calling acpi_bus_get_status() so we know whether | |
904 | * or not _STA is present. Note that we only look for object | |
905 | * handles -- cannot evaluate objects until we know the device is | |
906 | * present and properly initialized. | |
907 | */ | |
908 | result = acpi_bus_get_flags(device); | |
909 | if (result) | |
910 | goto end; | |
911 | ||
912 | /* | |
913 | * Status | |
914 | * ------ | |
6940faba KT |
915 | * See if the device is present. We always assume that non-Device |
916 | * and non-Processor objects (e.g. thermal zones, power resources, | |
917 | * etc.) are present, functioning, etc. (at least when parent object | |
918 | * is present). Note that _STA has a different meaning for some | |
919 | * objects (e.g. power resources) so we need to be careful how we use | |
920 | * it. | |
1da177e4 LT |
921 | */ |
922 | switch (type) { | |
6940faba | 923 | case ACPI_BUS_TYPE_PROCESSOR: |
1da177e4 LT |
924 | case ACPI_BUS_TYPE_DEVICE: |
925 | result = acpi_bus_get_status(device); | |
926 | if (ACPI_FAILURE(result) || !device->status.present) { | |
927 | result = -ENOENT; | |
928 | goto end; | |
929 | } | |
930 | break; | |
931 | default: | |
932 | STRUCT_TO_INT(device->status) = 0x0F; | |
933 | break; | |
934 | } | |
935 | ||
936 | /* | |
937 | * Initialize Device | |
938 | * ----------------- | |
939 | * TBD: Synch with Core's enumeration/initialization process. | |
940 | */ | |
941 | ||
942 | /* | |
943 | * Hardware ID, Unique ID, & Bus Address | |
944 | * ------------------------------------- | |
945 | */ | |
4be44fcd | 946 | acpi_device_set_id(device, parent, handle, type); |
1da177e4 LT |
947 | |
948 | /* | |
949 | * Power Management | |
950 | * ---------------- | |
951 | */ | |
952 | if (device->flags.power_manageable) { | |
953 | result = acpi_bus_get_power_flags(device); | |
954 | if (result) | |
955 | goto end; | |
956 | } | |
957 | ||
4be44fcd | 958 | /* |
1da177e4 LT |
959 | * Wakeup device management |
960 | *----------------------- | |
961 | */ | |
962 | if (device->flags.wake_capable) { | |
963 | result = acpi_bus_get_wakeup_device_flags(device); | |
964 | if (result) | |
965 | goto end; | |
966 | } | |
967 | ||
968 | /* | |
969 | * Performance Management | |
970 | * ---------------------- | |
971 | */ | |
972 | if (device->flags.performance_manageable) { | |
973 | result = acpi_bus_get_perf_flags(device); | |
974 | if (result) | |
975 | goto end; | |
976 | } | |
977 | ||
4be44fcd | 978 | if ((result = acpi_device_set_context(device, type))) |
1da177e4 LT |
979 | goto end; |
980 | ||
4be44fcd | 981 | acpi_device_get_debug_info(device, handle, type); |
1da177e4 | 982 | |
4be44fcd | 983 | acpi_device_register(device, parent); |
1da177e4 | 984 | |
4be44fcd | 985 | end: |
1da177e4 LT |
986 | if (!result) |
987 | *child = device; | |
988 | else { | |
6044ec88 | 989 | kfree(device->pnp.cid_list); |
1da177e4 LT |
990 | kfree(device); |
991 | } | |
992 | ||
d550d98d | 993 | return result; |
1da177e4 | 994 | } |
1da177e4 | 995 | |
4be44fcd | 996 | static int acpi_bus_scan(struct acpi_device *start, struct acpi_bus_ops *ops) |
1da177e4 | 997 | { |
4be44fcd LB |
998 | acpi_status status = AE_OK; |
999 | struct acpi_device *parent = NULL; | |
1000 | struct acpi_device *child = NULL; | |
1001 | acpi_handle phandle = NULL; | |
1002 | acpi_handle chandle = NULL; | |
1003 | acpi_object_type type = 0; | |
1004 | u32 level = 1; | |
1da177e4 | 1005 | |
1da177e4 LT |
1006 | |
1007 | if (!start) | |
d550d98d | 1008 | return -EINVAL; |
1da177e4 LT |
1009 | |
1010 | parent = start; | |
1011 | phandle = start->handle; | |
4be44fcd | 1012 | |
1da177e4 LT |
1013 | /* |
1014 | * Parse through the ACPI namespace, identify all 'devices', and | |
1015 | * create a new 'struct acpi_device' for each. | |
1016 | */ | |
1017 | while ((level > 0) && parent) { | |
1018 | ||
1019 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, | |
4be44fcd | 1020 | chandle, &chandle); |
1da177e4 LT |
1021 | |
1022 | /* | |
1023 | * If this scope is exhausted then move our way back up. | |
1024 | */ | |
1025 | if (ACPI_FAILURE(status)) { | |
1026 | level--; | |
1027 | chandle = phandle; | |
1028 | acpi_get_parent(phandle, &phandle); | |
1029 | if (parent->parent) | |
1030 | parent = parent->parent; | |
1031 | continue; | |
1032 | } | |
1033 | ||
1034 | status = acpi_get_type(chandle, &type); | |
1035 | if (ACPI_FAILURE(status)) | |
1036 | continue; | |
1037 | ||
1038 | /* | |
1039 | * If this is a scope object then parse it (depth-first). | |
1040 | */ | |
1041 | if (type == ACPI_TYPE_LOCAL_SCOPE) { | |
1042 | level++; | |
1043 | phandle = chandle; | |
1044 | chandle = NULL; | |
1045 | continue; | |
1046 | } | |
1047 | ||
1048 | /* | |
1049 | * We're only interested in objects that we consider 'devices'. | |
1050 | */ | |
1051 | switch (type) { | |
1052 | case ACPI_TYPE_DEVICE: | |
1053 | type = ACPI_BUS_TYPE_DEVICE; | |
1054 | break; | |
1055 | case ACPI_TYPE_PROCESSOR: | |
1056 | type = ACPI_BUS_TYPE_PROCESSOR; | |
1057 | break; | |
1058 | case ACPI_TYPE_THERMAL: | |
1059 | type = ACPI_BUS_TYPE_THERMAL; | |
1060 | break; | |
1061 | case ACPI_TYPE_POWER: | |
1062 | type = ACPI_BUS_TYPE_POWER; | |
1063 | break; | |
1064 | default: | |
1065 | continue; | |
1066 | } | |
1067 | ||
3fb02738 RS |
1068 | if (ops->acpi_op_add) |
1069 | status = acpi_add_single_object(&child, parent, | |
c4168bff | 1070 | chandle, type, ops); |
4be44fcd | 1071 | else |
3fb02738 RS |
1072 | status = acpi_bus_get_device(chandle, &child); |
1073 | ||
4be44fcd LB |
1074 | if (ACPI_FAILURE(status)) |
1075 | continue; | |
3fb02738 | 1076 | |
c4168bff | 1077 | if (ops->acpi_op_start && !(ops->acpi_op_add)) { |
3fb02738 RS |
1078 | status = acpi_start_single_object(child); |
1079 | if (ACPI_FAILURE(status)) | |
1080 | continue; | |
1081 | } | |
1da177e4 LT |
1082 | |
1083 | /* | |
1084 | * If the device is present, enabled, and functioning then | |
1085 | * parse its scope (depth-first). Note that we need to | |
1086 | * represent absent devices to facilitate PnP notifications | |
1087 | * -- but only the subtree head (not all of its children, | |
1088 | * which will be enumerated when the parent is inserted). | |
1089 | * | |
1090 | * TBD: Need notifications and other detection mechanisms | |
4be44fcd | 1091 | * in place before we can fully implement this. |
1da177e4 LT |
1092 | */ |
1093 | if (child->status.present) { | |
1094 | status = acpi_get_next_object(ACPI_TYPE_ANY, chandle, | |
1095 | NULL, NULL); | |
1096 | if (ACPI_SUCCESS(status)) { | |
1097 | level++; | |
1098 | phandle = chandle; | |
1099 | chandle = NULL; | |
1100 | parent = child; | |
1101 | } | |
1102 | } | |
1103 | } | |
1104 | ||
d550d98d | 1105 | return 0; |
1da177e4 | 1106 | } |
1da177e4 | 1107 | |
3fb02738 | 1108 | int |
4be44fcd LB |
1109 | acpi_bus_add(struct acpi_device **child, |
1110 | struct acpi_device *parent, acpi_handle handle, int type) | |
3fb02738 RS |
1111 | { |
1112 | int result; | |
1113 | struct acpi_bus_ops ops; | |
1114 | ||
c4168bff LS |
1115 | memset(&ops, 0, sizeof(ops)); |
1116 | ops.acpi_op_add = 1; | |
3fb02738 | 1117 | |
c4168bff LS |
1118 | result = acpi_add_single_object(child, parent, handle, type, &ops); |
1119 | if (!result) | |
3fb02738 | 1120 | result = acpi_bus_scan(*child, &ops); |
c4168bff | 1121 | |
d550d98d | 1122 | return result; |
3fb02738 | 1123 | } |
4be44fcd | 1124 | |
3fb02738 RS |
1125 | EXPORT_SYMBOL(acpi_bus_add); |
1126 | ||
4be44fcd | 1127 | int acpi_bus_start(struct acpi_device *device) |
3fb02738 RS |
1128 | { |
1129 | int result; | |
1130 | struct acpi_bus_ops ops; | |
1131 | ||
3fb02738 RS |
1132 | |
1133 | if (!device) | |
d550d98d | 1134 | return -EINVAL; |
3fb02738 RS |
1135 | |
1136 | result = acpi_start_single_object(device); | |
1137 | if (!result) { | |
1138 | memset(&ops, 0, sizeof(ops)); | |
1139 | ops.acpi_op_start = 1; | |
1140 | result = acpi_bus_scan(device, &ops); | |
1141 | } | |
d550d98d | 1142 | return result; |
3fb02738 | 1143 | } |
4be44fcd | 1144 | |
3fb02738 | 1145 | EXPORT_SYMBOL(acpi_bus_start); |
1da177e4 | 1146 | |
ceaba663 | 1147 | int acpi_bus_trim(struct acpi_device *start, int rmdevice) |
1da177e4 | 1148 | { |
4be44fcd LB |
1149 | acpi_status status; |
1150 | struct acpi_device *parent, *child; | |
1151 | acpi_handle phandle, chandle; | |
1152 | acpi_object_type type; | |
1153 | u32 level = 1; | |
1154 | int err = 0; | |
1155 | ||
1156 | parent = start; | |
1da177e4 LT |
1157 | phandle = start->handle; |
1158 | child = chandle = NULL; | |
1159 | ||
1160 | while ((level > 0) && parent && (!err)) { | |
1161 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, | |
4be44fcd | 1162 | chandle, &chandle); |
1da177e4 LT |
1163 | |
1164 | /* | |
1165 | * If this scope is exhausted then move our way back up. | |
1166 | */ | |
1167 | if (ACPI_FAILURE(status)) { | |
1168 | level--; | |
1169 | chandle = phandle; | |
1170 | acpi_get_parent(phandle, &phandle); | |
1171 | child = parent; | |
1172 | parent = parent->parent; | |
1173 | ||
1174 | if (level == 0) | |
1175 | err = acpi_bus_remove(child, rmdevice); | |
1176 | else | |
1177 | err = acpi_bus_remove(child, 1); | |
1178 | ||
1179 | continue; | |
1180 | } | |
1181 | ||
1182 | status = acpi_get_type(chandle, &type); | |
1183 | if (ACPI_FAILURE(status)) { | |
1184 | continue; | |
1185 | } | |
1186 | /* | |
1187 | * If there is a device corresponding to chandle then | |
1188 | * parse it (depth-first). | |
1189 | */ | |
1190 | if (acpi_bus_get_device(chandle, &child) == 0) { | |
1191 | level++; | |
1192 | phandle = chandle; | |
1193 | chandle = NULL; | |
1194 | parent = child; | |
1195 | } | |
1196 | continue; | |
1197 | } | |
1198 | return err; | |
1199 | } | |
ceaba663 KA |
1200 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
1201 | ||
1da177e4 | 1202 | |
4be44fcd | 1203 | static int acpi_bus_scan_fixed(struct acpi_device *root) |
1da177e4 | 1204 | { |
4be44fcd LB |
1205 | int result = 0; |
1206 | struct acpi_device *device = NULL; | |
c4168bff | 1207 | struct acpi_bus_ops ops; |
1da177e4 LT |
1208 | |
1209 | if (!root) | |
d550d98d | 1210 | return -ENODEV; |
1da177e4 | 1211 | |
c4168bff LS |
1212 | memset(&ops, 0, sizeof(ops)); |
1213 | ops.acpi_op_add = 1; | |
1214 | ops.acpi_op_start = 1; | |
1215 | ||
1da177e4 LT |
1216 | /* |
1217 | * Enumerate all fixed-feature devices. | |
1218 | */ | |
3fb02738 RS |
1219 | if (acpi_fadt.pwr_button == 0) { |
1220 | result = acpi_add_single_object(&device, acpi_root, | |
4be44fcd | 1221 | NULL, |
c4168bff LS |
1222 | ACPI_BUS_TYPE_POWER_BUTTON, |
1223 | &ops); | |
3fb02738 | 1224 | } |
1da177e4 | 1225 | |
3fb02738 RS |
1226 | if (acpi_fadt.sleep_button == 0) { |
1227 | result = acpi_add_single_object(&device, acpi_root, | |
4be44fcd | 1228 | NULL, |
c4168bff LS |
1229 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
1230 | &ops); | |
3fb02738 | 1231 | } |
1da177e4 | 1232 | |
d550d98d | 1233 | return result; |
1da177e4 LT |
1234 | } |
1235 | ||
1da177e4 LT |
1236 | static int __init acpi_scan_init(void) |
1237 | { | |
1238 | int result; | |
3fb02738 | 1239 | struct acpi_bus_ops ops; |
1da177e4 | 1240 | |
1da177e4 LT |
1241 | |
1242 | if (acpi_disabled) | |
d550d98d | 1243 | return 0; |
1da177e4 | 1244 | |
c4168bff LS |
1245 | memset(&ops, 0, sizeof(ops)); |
1246 | ops.acpi_op_add = 1; | |
1247 | ops.acpi_op_start = 1; | |
1248 | ||
5b327265 PM |
1249 | result = bus_register(&acpi_bus_type); |
1250 | if (result) { | |
1251 | /* We don't want to quit even if we failed to add suspend/resume */ | |
1252 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
1253 | } | |
1254 | ||
1da177e4 LT |
1255 | /* |
1256 | * Create the root device in the bus's device tree | |
1257 | */ | |
3fb02738 | 1258 | result = acpi_add_single_object(&acpi_root, NULL, ACPI_ROOT_OBJECT, |
c4168bff | 1259 | ACPI_BUS_TYPE_SYSTEM, &ops); |
5b327265 PM |
1260 | if (result) |
1261 | goto Done; | |
1262 | ||
1da177e4 LT |
1263 | /* |
1264 | * Enumerate devices in the ACPI namespace. | |
1265 | */ | |
1266 | result = acpi_bus_scan_fixed(acpi_root); | |
c4168bff | 1267 | if (!result) |
3fb02738 | 1268 | result = acpi_bus_scan(acpi_root, &ops); |
1da177e4 LT |
1269 | |
1270 | if (result) | |
1271 | acpi_device_unregister(acpi_root, ACPI_BUS_REMOVAL_NORMAL); | |
1272 | ||
4be44fcd | 1273 | Done: |
d550d98d | 1274 | return result; |
1da177e4 LT |
1275 | } |
1276 | ||
1277 | subsys_initcall(acpi_scan_init); |