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> | |
7 | #include <linux/acpi.h> | |
8 | ||
9 | #include <acpi/acpi_drivers.h> | |
10 | #include <acpi/acinterp.h> /* for acpi_ex_eisa_id_to_string() */ | |
11 | ||
1da177e4 | 12 | #define _COMPONENT ACPI_BUS_COMPONENT |
4be44fcd | 13 | ACPI_MODULE_NAME("scan") |
1da177e4 | 14 | #define STRUCT_TO_INT(s) (*((int*)&s)) |
4be44fcd | 15 | extern struct acpi_device *acpi_root; |
1da177e4 LT |
16 | |
17 | #define ACPI_BUS_CLASS "system_bus" | |
18 | #define ACPI_BUS_HID "ACPI_BUS" | |
19 | #define ACPI_BUS_DRIVER_NAME "ACPI Bus Driver" | |
20 | #define ACPI_BUS_DEVICE_NAME "System Bus" | |
21 | ||
22 | static LIST_HEAD(acpi_device_list); | |
23 | DEFINE_SPINLOCK(acpi_device_lock); | |
24 | LIST_HEAD(acpi_wakeup_device_list); | |
25 | ||
4be44fcd | 26 | static int acpi_bus_trim(struct acpi_device *start, int rmdevice); |
1da177e4 | 27 | |
4be44fcd | 28 | static void acpi_device_release(struct kobject *kobj) |
1da177e4 | 29 | { |
4be44fcd | 30 | struct acpi_device *dev = container_of(kobj, struct acpi_device, kobj); |
1da177e4 LT |
31 | if (dev->pnp.cid_list) |
32 | kfree(dev->pnp.cid_list); | |
33 | kfree(dev); | |
34 | } | |
35 | ||
36 | struct acpi_device_attribute { | |
37 | struct attribute attr; | |
4be44fcd LB |
38 | ssize_t(*show) (struct acpi_device *, char *); |
39 | ssize_t(*store) (struct acpi_device *, const char *, size_t); | |
1da177e4 LT |
40 | }; |
41 | ||
42 | typedef void acpi_device_sysfs_files(struct kobject *, | |
4be44fcd | 43 | const struct attribute *); |
1da177e4 LT |
44 | |
45 | static void setup_sys_fs_device_files(struct acpi_device *dev, | |
4be44fcd | 46 | acpi_device_sysfs_files * func); |
1da177e4 LT |
47 | |
48 | #define create_sysfs_device_files(dev) \ | |
49 | setup_sys_fs_device_files(dev, (acpi_device_sysfs_files *)&sysfs_create_file) | |
50 | #define remove_sysfs_device_files(dev) \ | |
51 | setup_sys_fs_device_files(dev, (acpi_device_sysfs_files *)&sysfs_remove_file) | |
52 | ||
1da177e4 LT |
53 | #define to_acpi_device(n) container_of(n, struct acpi_device, kobj) |
54 | #define to_handle_attr(n) container_of(n, struct acpi_device_attribute, attr); | |
55 | ||
56 | static ssize_t acpi_device_attr_show(struct kobject *kobj, | |
4be44fcd | 57 | struct attribute *attr, char *buf) |
1da177e4 LT |
58 | { |
59 | struct acpi_device *device = to_acpi_device(kobj); | |
60 | struct acpi_device_attribute *attribute = to_handle_attr(attr); | |
70f2817a | 61 | return attribute->show ? attribute->show(device, buf) : -EIO; |
1da177e4 LT |
62 | } |
63 | static ssize_t acpi_device_attr_store(struct kobject *kobj, | |
4be44fcd LB |
64 | struct attribute *attr, const char *buf, |
65 | size_t len) | |
1da177e4 LT |
66 | { |
67 | struct acpi_device *device = to_acpi_device(kobj); | |
68 | struct acpi_device_attribute *attribute = to_handle_attr(attr); | |
70f2817a | 69 | return attribute->store ? attribute->store(device, buf, len) : -EIO; |
1da177e4 LT |
70 | } |
71 | ||
72 | static struct sysfs_ops acpi_device_sysfs_ops = { | |
4be44fcd LB |
73 | .show = acpi_device_attr_show, |
74 | .store = acpi_device_attr_store, | |
1da177e4 LT |
75 | }; |
76 | ||
77 | static struct kobj_type ktype_acpi_ns = { | |
4be44fcd LB |
78 | .sysfs_ops = &acpi_device_sysfs_ops, |
79 | .release = acpi_device_release, | |
1da177e4 LT |
80 | }; |
81 | ||
82 | static int namespace_hotplug(struct kset *kset, struct kobject *kobj, | |
83 | char **envp, int num_envp, char *buffer, | |
84 | int buffer_size) | |
85 | { | |
86 | struct acpi_device *dev = to_acpi_device(kobj); | |
87 | int i = 0; | |
88 | int len = 0; | |
89 | ||
90 | if (!dev->driver) | |
91 | return 0; | |
92 | ||
93 | if (add_hotplug_env_var(envp, num_envp, &i, buffer, buffer_size, &len, | |
94 | "PHYSDEVDRIVER=%s", dev->driver->name)) | |
95 | return -ENOMEM; | |
96 | ||
97 | envp[i] = NULL; | |
98 | ||
99 | return 0; | |
100 | } | |
101 | ||
102 | static struct kset_hotplug_ops namespace_hotplug_ops = { | |
103 | .hotplug = &namespace_hotplug, | |
104 | }; | |
105 | ||
106 | static struct kset acpi_namespace_kset = { | |
4be44fcd LB |
107 | .kobj = { |
108 | .name = "namespace", | |
109 | }, | |
1da177e4 | 110 | .subsys = &acpi_subsys, |
4be44fcd | 111 | .ktype = &ktype_acpi_ns, |
1da177e4 LT |
112 | .hotplug_ops = &namespace_hotplug_ops, |
113 | }; | |
114 | ||
4be44fcd LB |
115 | static void acpi_device_register(struct acpi_device *device, |
116 | struct acpi_device *parent) | |
1da177e4 LT |
117 | { |
118 | /* | |
119 | * Linkage | |
120 | * ------- | |
121 | * Link this device to its parent and siblings. | |
122 | */ | |
123 | INIT_LIST_HEAD(&device->children); | |
124 | INIT_LIST_HEAD(&device->node); | |
125 | INIT_LIST_HEAD(&device->g_list); | |
126 | INIT_LIST_HEAD(&device->wakeup_list); | |
127 | ||
128 | spin_lock(&acpi_device_lock); | |
129 | if (device->parent) { | |
130 | list_add_tail(&device->node, &device->parent->children); | |
4be44fcd | 131 | list_add_tail(&device->g_list, &device->parent->g_list); |
1da177e4 | 132 | } else |
4be44fcd | 133 | list_add_tail(&device->g_list, &acpi_device_list); |
1da177e4 | 134 | if (device->wakeup.flags.valid) |
4be44fcd | 135 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); |
1da177e4 LT |
136 | spin_unlock(&acpi_device_lock); |
137 | ||
4be44fcd | 138 | strlcpy(device->kobj.name, device->pnp.bus_id, KOBJ_NAME_LEN); |
1da177e4 LT |
139 | if (parent) |
140 | device->kobj.parent = &parent->kobj; | |
141 | device->kobj.ktype = &ktype_acpi_ns; | |
142 | device->kobj.kset = &acpi_namespace_kset; | |
143 | kobject_register(&device->kobj); | |
144 | create_sysfs_device_files(device); | |
145 | } | |
146 | ||
4be44fcd | 147 | static int acpi_device_unregister(struct acpi_device *device, int type) |
1da177e4 LT |
148 | { |
149 | spin_lock(&acpi_device_lock); | |
150 | if (device->parent) { | |
151 | list_del(&device->node); | |
152 | list_del(&device->g_list); | |
153 | } else | |
154 | list_del(&device->g_list); | |
155 | ||
156 | list_del(&device->wakeup_list); | |
157 | ||
158 | spin_unlock(&acpi_device_lock); | |
159 | ||
160 | acpi_detach_data(device->handle, acpi_bus_data_handler); | |
161 | remove_sysfs_device_files(device); | |
162 | kobject_unregister(&device->kobj); | |
163 | return 0; | |
164 | } | |
165 | ||
4be44fcd | 166 | void acpi_bus_data_handler(acpi_handle handle, u32 function, void *context) |
1da177e4 LT |
167 | { |
168 | ACPI_FUNCTION_TRACE("acpi_bus_data_handler"); | |
169 | ||
170 | /* TBD */ | |
171 | ||
172 | return_VOID; | |
173 | } | |
174 | ||
4be44fcd | 175 | static int acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 176 | { |
4be44fcd LB |
177 | acpi_status status = 0; |
178 | acpi_handle handle = NULL; | |
179 | u32 i = 0; | |
1da177e4 LT |
180 | |
181 | ACPI_FUNCTION_TRACE("acpi_bus_get_power_flags"); | |
182 | ||
183 | /* | |
184 | * Power Management Flags | |
185 | */ | |
186 | status = acpi_get_handle(device->handle, "_PSC", &handle); | |
187 | if (ACPI_SUCCESS(status)) | |
188 | device->power.flags.explicit_get = 1; | |
189 | status = acpi_get_handle(device->handle, "_IRC", &handle); | |
190 | if (ACPI_SUCCESS(status)) | |
191 | device->power.flags.inrush_current = 1; | |
192 | ||
193 | /* | |
194 | * Enumerate supported power management states | |
195 | */ | |
196 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3; i++) { | |
197 | struct acpi_device_power_state *ps = &device->power.states[i]; | |
4be44fcd | 198 | char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' }; |
1da177e4 LT |
199 | |
200 | /* Evaluate "_PRx" to se if power resources are referenced */ | |
201 | acpi_evaluate_reference(device->handle, object_name, NULL, | |
4be44fcd | 202 | &ps->resources); |
1da177e4 LT |
203 | if (ps->resources.count) { |
204 | device->power.flags.power_resources = 1; | |
205 | ps->flags.valid = 1; | |
206 | } | |
207 | ||
208 | /* Evaluate "_PSx" to see if we can do explicit sets */ | |
209 | object_name[2] = 'S'; | |
210 | status = acpi_get_handle(device->handle, object_name, &handle); | |
211 | if (ACPI_SUCCESS(status)) { | |
212 | ps->flags.explicit_set = 1; | |
213 | ps->flags.valid = 1; | |
214 | } | |
215 | ||
216 | /* State is valid if we have some power control */ | |
217 | if (ps->resources.count || ps->flags.explicit_set) | |
218 | ps->flags.valid = 1; | |
219 | ||
4be44fcd | 220 | ps->power = -1; /* Unknown - driver assigned */ |
1da177e4 LT |
221 | ps->latency = -1; /* Unknown - driver assigned */ |
222 | } | |
223 | ||
224 | /* Set defaults for D0 and D3 states (always valid) */ | |
225 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
226 | device->power.states[ACPI_STATE_D0].power = 100; | |
227 | device->power.states[ACPI_STATE_D3].flags.valid = 1; | |
228 | device->power.states[ACPI_STATE_D3].power = 0; | |
229 | ||
230 | /* TBD: System wake support and resource requirements. */ | |
231 | ||
232 | device->power.state = ACPI_STATE_UNKNOWN; | |
233 | ||
234 | return_VALUE(0); | |
235 | } | |
236 | ||
4be44fcd | 237 | int acpi_match_ids(struct acpi_device *device, char *ids) |
1da177e4 LT |
238 | { |
239 | int error = 0; | |
4be44fcd | 240 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 LT |
241 | |
242 | if (device->flags.hardware_id) | |
243 | if (strstr(ids, device->pnp.hardware_id)) | |
244 | goto Done; | |
245 | ||
246 | if (device->flags.compatible_ids) { | |
247 | struct acpi_compatible_id_list *cid_list = device->pnp.cid_list; | |
248 | int i; | |
249 | ||
250 | /* compare multiple _CID entries against driver ids */ | |
4be44fcd | 251 | for (i = 0; i < cid_list->count; i++) { |
1da177e4 LT |
252 | if (strstr(ids, cid_list->id[i].value)) |
253 | goto Done; | |
254 | } | |
255 | } | |
256 | error = -ENOENT; | |
257 | ||
4be44fcd | 258 | Done: |
1da177e4 LT |
259 | if (buffer.pointer) |
260 | acpi_os_free(buffer.pointer); | |
261 | return error; | |
262 | } | |
263 | ||
264 | static acpi_status | |
4be44fcd LB |
265 | acpi_bus_extract_wakeup_device_power_package(struct acpi_device *device, |
266 | union acpi_object *package) | |
1da177e4 | 267 | { |
4be44fcd LB |
268 | int i = 0; |
269 | union acpi_object *element = NULL; | |
1da177e4 LT |
270 | |
271 | if (!device || !package || (package->package.count < 2)) | |
272 | return AE_BAD_PARAMETER; | |
273 | ||
274 | element = &(package->package.elements[0]); | |
275 | if (!element) | |
276 | return AE_BAD_PARAMETER; | |
277 | if (element->type == ACPI_TYPE_PACKAGE) { | |
278 | if ((element->package.count < 2) || | |
4be44fcd LB |
279 | (element->package.elements[0].type != |
280 | ACPI_TYPE_LOCAL_REFERENCE) | |
281 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) | |
1da177e4 | 282 | return AE_BAD_DATA; |
4be44fcd LB |
283 | device->wakeup.gpe_device = |
284 | element->package.elements[0].reference.handle; | |
285 | device->wakeup.gpe_number = | |
286 | (u32) element->package.elements[1].integer.value; | |
287 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
1da177e4 | 288 | device->wakeup.gpe_number = element->integer.value; |
4be44fcd | 289 | } else |
1da177e4 LT |
290 | return AE_BAD_DATA; |
291 | ||
292 | element = &(package->package.elements[1]); | |
293 | if (element->type != ACPI_TYPE_INTEGER) { | |
294 | return AE_BAD_DATA; | |
295 | } | |
296 | device->wakeup.sleep_state = element->integer.value; | |
297 | ||
298 | if ((package->package.count - 2) > ACPI_MAX_HANDLES) { | |
299 | return AE_NO_MEMORY; | |
300 | } | |
301 | device->wakeup.resources.count = package->package.count - 2; | |
4be44fcd | 302 | for (i = 0; i < device->wakeup.resources.count; i++) { |
1da177e4 | 303 | element = &(package->package.elements[i + 2]); |
4be44fcd | 304 | if (element->type != ACPI_TYPE_ANY) { |
1da177e4 LT |
305 | return AE_BAD_DATA; |
306 | } | |
307 | ||
308 | device->wakeup.resources.handles[i] = element->reference.handle; | |
309 | } | |
310 | ||
311 | return AE_OK; | |
312 | } | |
313 | ||
4be44fcd | 314 | static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
1da177e4 | 315 | { |
4be44fcd LB |
316 | acpi_status status = 0; |
317 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
318 | union acpi_object *package = NULL; | |
1da177e4 LT |
319 | |
320 | ACPI_FUNCTION_TRACE("acpi_bus_get_wakeup_flags"); | |
321 | ||
322 | /* _PRW */ | |
323 | status = acpi_evaluate_object(device->handle, "_PRW", NULL, &buffer); | |
324 | if (ACPI_FAILURE(status)) { | |
325 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error evaluating _PRW\n")); | |
326 | goto end; | |
327 | } | |
328 | ||
4be44fcd | 329 | package = (union acpi_object *)buffer.pointer; |
1da177e4 LT |
330 | status = acpi_bus_extract_wakeup_device_power_package(device, package); |
331 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
332 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
333 | "Error extracting _PRW package\n")); | |
1da177e4 LT |
334 | goto end; |
335 | } | |
336 | ||
337 | acpi_os_free(buffer.pointer); | |
338 | ||
339 | device->wakeup.flags.valid = 1; | |
4be44fcd | 340 | /* Power button, Lid switch always enable wakeup */ |
1da177e4 LT |
341 | if (!acpi_match_ids(device, "PNP0C0D,PNP0C0C,PNP0C0E")) |
342 | device->wakeup.flags.run_wake = 1; | |
343 | ||
4be44fcd | 344 | end: |
1da177e4 LT |
345 | if (ACPI_FAILURE(status)) |
346 | device->flags.wake_capable = 0; | |
347 | return_VALUE(0); | |
348 | } | |
349 | ||
350 | /* -------------------------------------------------------------------------- | |
351 | ACPI hotplug sysfs device file support | |
352 | -------------------------------------------------------------------------- */ | |
4be44fcd LB |
353 | static ssize_t acpi_eject_store(struct acpi_device *device, |
354 | const char *buf, size_t count); | |
1da177e4 LT |
355 | |
356 | #define ACPI_DEVICE_ATTR(_name,_mode,_show,_store) \ | |
357 | static struct acpi_device_attribute acpi_device_attr_##_name = \ | |
358 | __ATTR(_name, _mode, _show, _store) | |
359 | ||
360 | ACPI_DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); | |
361 | ||
362 | /** | |
363 | * setup_sys_fs_device_files - sets up the device files under device namespace | |
67be2dd1 MW |
364 | * @dev: acpi_device object |
365 | * @func: function pointer to create or destroy the device file | |
1da177e4 LT |
366 | */ |
367 | static void | |
4be44fcd LB |
368 | setup_sys_fs_device_files(struct acpi_device *dev, |
369 | acpi_device_sysfs_files * func) | |
1da177e4 | 370 | { |
4be44fcd LB |
371 | acpi_status status; |
372 | acpi_handle temp = NULL; | |
1da177e4 LT |
373 | |
374 | /* | |
375 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
376 | * hot-removal function from userland. | |
377 | */ | |
378 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); | |
379 | if (ACPI_SUCCESS(status)) | |
4be44fcd | 380 | (*(func)) (&dev->kobj, &acpi_device_attr_eject.attr); |
1da177e4 LT |
381 | } |
382 | ||
4be44fcd | 383 | static int acpi_eject_operation(acpi_handle handle, int lockable) |
1da177e4 LT |
384 | { |
385 | struct acpi_object_list arg_list; | |
386 | union acpi_object arg; | |
387 | acpi_status status = AE_OK; | |
388 | ||
389 | /* | |
390 | * TBD: evaluate _PS3? | |
391 | */ | |
392 | ||
393 | if (lockable) { | |
394 | arg_list.count = 1; | |
395 | arg_list.pointer = &arg; | |
396 | arg.type = ACPI_TYPE_INTEGER; | |
397 | arg.integer.value = 0; | |
398 | acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); | |
399 | } | |
400 | ||
401 | arg_list.count = 1; | |
402 | arg_list.pointer = &arg; | |
403 | arg.type = ACPI_TYPE_INTEGER; | |
404 | arg.integer.value = 1; | |
405 | ||
406 | /* | |
407 | * TBD: _EJD support. | |
408 | */ | |
409 | ||
410 | status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); | |
411 | if (ACPI_FAILURE(status)) { | |
4be44fcd | 412 | return (-ENODEV); |
1da177e4 LT |
413 | } |
414 | ||
4be44fcd | 415 | return (0); |
1da177e4 LT |
416 | } |
417 | ||
1da177e4 LT |
418 | static ssize_t |
419 | acpi_eject_store(struct acpi_device *device, const char *buf, size_t count) | |
420 | { | |
4be44fcd LB |
421 | int result; |
422 | int ret = count; | |
423 | int islockable; | |
424 | acpi_status status; | |
425 | acpi_handle handle; | |
426 | acpi_object_type type = 0; | |
1da177e4 LT |
427 | |
428 | if ((!count) || (buf[0] != '1')) { | |
429 | return -EINVAL; | |
430 | } | |
1da177e4 LT |
431 | #ifndef FORCE_EJECT |
432 | if (device->driver == NULL) { | |
433 | ret = -ENODEV; | |
434 | goto err; | |
435 | } | |
436 | #endif | |
437 | status = acpi_get_type(device->handle, &type); | |
4be44fcd | 438 | if (ACPI_FAILURE(status) || (!device->flags.ejectable)) { |
1da177e4 LT |
439 | ret = -ENODEV; |
440 | goto err; | |
441 | } | |
442 | ||
443 | islockable = device->flags.lockable; | |
444 | handle = device->handle; | |
445 | ||
446 | if (type == ACPI_TYPE_PROCESSOR) | |
447 | result = acpi_bus_trim(device, 0); | |
448 | else | |
449 | result = acpi_bus_trim(device, 1); | |
450 | ||
451 | if (!result) | |
452 | result = acpi_eject_operation(handle, islockable); | |
453 | ||
454 | if (result) { | |
455 | ret = -EBUSY; | |
456 | } | |
4be44fcd | 457 | err: |
1da177e4 LT |
458 | return ret; |
459 | } | |
460 | ||
1da177e4 LT |
461 | /* -------------------------------------------------------------------------- |
462 | Performance Management | |
463 | -------------------------------------------------------------------------- */ | |
464 | ||
4be44fcd | 465 | static int acpi_bus_get_perf_flags(struct acpi_device *device) |
1da177e4 LT |
466 | { |
467 | device->performance.state = ACPI_STATE_UNKNOWN; | |
468 | return 0; | |
469 | } | |
470 | ||
471 | /* -------------------------------------------------------------------------- | |
472 | Driver Management | |
473 | -------------------------------------------------------------------------- */ | |
474 | ||
475 | static LIST_HEAD(acpi_bus_drivers); | |
476 | static DECLARE_MUTEX(acpi_bus_drivers_lock); | |
477 | ||
1da177e4 LT |
478 | /** |
479 | * acpi_bus_match | |
480 | * -------------- | |
481 | * Checks the device's hardware (_HID) or compatible (_CID) ids to see if it | |
482 | * matches the specified driver's criteria. | |
483 | */ | |
484 | static int | |
4be44fcd | 485 | acpi_bus_match(struct acpi_device *device, struct acpi_driver *driver) |
1da177e4 LT |
486 | { |
487 | if (driver && driver->ops.match) | |
488 | return driver->ops.match(device, driver); | |
489 | return acpi_match_ids(device, driver->ids); | |
490 | } | |
491 | ||
1da177e4 LT |
492 | /** |
493 | * acpi_bus_driver_init | |
494 | * -------------------- | |
495 | * Used to initialize a device via its device driver. Called whenever a | |
496 | * driver is bound to a device. Invokes the driver's add() and start() ops. | |
497 | */ | |
498 | static int | |
4be44fcd | 499 | acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) |
1da177e4 | 500 | { |
4be44fcd | 501 | int result = 0; |
1da177e4 LT |
502 | |
503 | ACPI_FUNCTION_TRACE("acpi_bus_driver_init"); | |
504 | ||
505 | if (!device || !driver) | |
506 | return_VALUE(-EINVAL); | |
507 | ||
508 | if (!driver->ops.add) | |
509 | return_VALUE(-ENOSYS); | |
510 | ||
511 | result = driver->ops.add(device); | |
512 | if (result) { | |
513 | device->driver = NULL; | |
514 | acpi_driver_data(device) = NULL; | |
515 | return_VALUE(result); | |
516 | } | |
517 | ||
518 | device->driver = driver; | |
519 | ||
520 | /* | |
521 | * TBD - Configuration Management: Assign resources to device based | |
522 | * upon possible configuration and currently allocated resources. | |
523 | */ | |
524 | ||
4be44fcd LB |
525 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
526 | "Driver successfully bound to device\n")); | |
3fb02738 RS |
527 | return_VALUE(0); |
528 | } | |
529 | ||
8713cbef | 530 | static int acpi_start_single_object(struct acpi_device *device) |
3fb02738 RS |
531 | { |
532 | int result = 0; | |
533 | struct acpi_driver *driver; | |
534 | ||
535 | ACPI_FUNCTION_TRACE("acpi_start_single_object"); | |
536 | ||
537 | if (!(driver = device->driver)) | |
538 | return_VALUE(0); | |
539 | ||
1da177e4 LT |
540 | if (driver->ops.start) { |
541 | result = driver->ops.start(device); | |
542 | if (result && driver->ops.remove) | |
543 | driver->ops.remove(device, ACPI_BUS_REMOVAL_NORMAL); | |
1da177e4 LT |
544 | } |
545 | ||
3fb02738 | 546 | return_VALUE(result); |
1da177e4 LT |
547 | } |
548 | ||
4be44fcd | 549 | static int acpi_driver_attach(struct acpi_driver *drv) |
1da177e4 | 550 | { |
4be44fcd | 551 | struct list_head *node, *next; |
1da177e4 LT |
552 | int count = 0; |
553 | ||
554 | ACPI_FUNCTION_TRACE("acpi_driver_attach"); | |
555 | ||
556 | spin_lock(&acpi_device_lock); | |
557 | list_for_each_safe(node, next, &acpi_device_list) { | |
4be44fcd LB |
558 | struct acpi_device *dev = |
559 | container_of(node, struct acpi_device, g_list); | |
1da177e4 LT |
560 | |
561 | if (dev->driver || !dev->status.present) | |
562 | continue; | |
563 | spin_unlock(&acpi_device_lock); | |
564 | ||
565 | if (!acpi_bus_match(dev, drv)) { | |
566 | if (!acpi_bus_driver_init(dev, drv)) { | |
3fb02738 | 567 | acpi_start_single_object(dev); |
1da177e4 LT |
568 | atomic_inc(&drv->references); |
569 | count++; | |
4be44fcd LB |
570 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
571 | "Found driver [%s] for device [%s]\n", | |
1da177e4 LT |
572 | drv->name, dev->pnp.bus_id)); |
573 | } | |
574 | } | |
575 | spin_lock(&acpi_device_lock); | |
576 | } | |
577 | spin_unlock(&acpi_device_lock); | |
578 | return_VALUE(count); | |
579 | } | |
580 | ||
4be44fcd | 581 | static int acpi_driver_detach(struct acpi_driver *drv) |
1da177e4 | 582 | { |
4be44fcd | 583 | struct list_head *node, *next; |
1da177e4 LT |
584 | |
585 | ACPI_FUNCTION_TRACE("acpi_driver_detach"); | |
586 | ||
587 | spin_lock(&acpi_device_lock); | |
4be44fcd LB |
588 | list_for_each_safe(node, next, &acpi_device_list) { |
589 | struct acpi_device *dev = | |
590 | container_of(node, struct acpi_device, g_list); | |
1da177e4 LT |
591 | |
592 | if (dev->driver == drv) { | |
593 | spin_unlock(&acpi_device_lock); | |
594 | if (drv->ops.remove) | |
4be44fcd | 595 | drv->ops.remove(dev, ACPI_BUS_REMOVAL_NORMAL); |
1da177e4 LT |
596 | spin_lock(&acpi_device_lock); |
597 | dev->driver = NULL; | |
598 | dev->driver_data = NULL; | |
599 | atomic_dec(&drv->references); | |
600 | } | |
601 | } | |
602 | spin_unlock(&acpi_device_lock); | |
603 | return_VALUE(0); | |
604 | } | |
605 | ||
606 | /** | |
607 | * acpi_bus_register_driver | |
608 | * ------------------------ | |
609 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
610 | * devices that match the driver's criteria and binds. Returns the | |
611 | * number of devices that were claimed by the driver, or a negative | |
612 | * error status for failure. | |
613 | */ | |
4be44fcd | 614 | int acpi_bus_register_driver(struct acpi_driver *driver) |
1da177e4 LT |
615 | { |
616 | int count; | |
617 | ||
618 | ACPI_FUNCTION_TRACE("acpi_bus_register_driver"); | |
619 | ||
620 | if (acpi_disabled) | |
621 | return_VALUE(-ENODEV); | |
622 | ||
623 | if (!driver) | |
624 | return_VALUE(-EINVAL); | |
625 | ||
626 | spin_lock(&acpi_device_lock); | |
627 | list_add_tail(&driver->node, &acpi_bus_drivers); | |
628 | spin_unlock(&acpi_device_lock); | |
629 | count = acpi_driver_attach(driver); | |
630 | ||
631 | return_VALUE(count); | |
632 | } | |
1da177e4 | 633 | |
4be44fcd | 634 | EXPORT_SYMBOL(acpi_bus_register_driver); |
1da177e4 LT |
635 | |
636 | /** | |
637 | * acpi_bus_unregister_driver | |
638 | * -------------------------- | |
639 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
640 | * devices that match the driver's criteria and unbinds. | |
641 | */ | |
4be44fcd | 642 | int acpi_bus_unregister_driver(struct acpi_driver *driver) |
1da177e4 LT |
643 | { |
644 | int error = 0; | |
645 | ||
646 | ACPI_FUNCTION_TRACE("acpi_bus_unregister_driver"); | |
647 | ||
648 | if (driver) { | |
649 | acpi_driver_detach(driver); | |
650 | ||
651 | if (!atomic_read(&driver->references)) { | |
652 | spin_lock(&acpi_device_lock); | |
653 | list_del_init(&driver->node); | |
654 | spin_unlock(&acpi_device_lock); | |
4be44fcd LB |
655 | } |
656 | } else | |
1da177e4 LT |
657 | error = -EINVAL; |
658 | return_VALUE(error); | |
659 | } | |
4be44fcd | 660 | |
1da177e4 LT |
661 | EXPORT_SYMBOL(acpi_bus_unregister_driver); |
662 | ||
663 | /** | |
664 | * acpi_bus_find_driver | |
665 | * -------------------- | |
666 | * Parses the list of registered drivers looking for a driver applicable for | |
667 | * the specified device. | |
668 | */ | |
4be44fcd | 669 | static int acpi_bus_find_driver(struct acpi_device *device) |
1da177e4 | 670 | { |
4be44fcd LB |
671 | int result = 0; |
672 | struct list_head *node, *next; | |
1da177e4 LT |
673 | |
674 | ACPI_FUNCTION_TRACE("acpi_bus_find_driver"); | |
675 | ||
676 | spin_lock(&acpi_device_lock); | |
4be44fcd LB |
677 | list_for_each_safe(node, next, &acpi_bus_drivers) { |
678 | struct acpi_driver *driver = | |
679 | container_of(node, struct acpi_driver, node); | |
1da177e4 LT |
680 | |
681 | atomic_inc(&driver->references); | |
682 | spin_unlock(&acpi_device_lock); | |
683 | if (!acpi_bus_match(device, driver)) { | |
684 | result = acpi_bus_driver_init(device, driver); | |
685 | if (!result) | |
686 | goto Done; | |
687 | } | |
688 | atomic_dec(&driver->references); | |
689 | spin_lock(&acpi_device_lock); | |
690 | } | |
691 | spin_unlock(&acpi_device_lock); | |
692 | ||
4be44fcd | 693 | Done: |
1da177e4 LT |
694 | return_VALUE(result); |
695 | } | |
696 | ||
1da177e4 LT |
697 | /* -------------------------------------------------------------------------- |
698 | Device Enumeration | |
699 | -------------------------------------------------------------------------- */ | |
700 | ||
4be44fcd | 701 | static int acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 702 | { |
4be44fcd LB |
703 | acpi_status status = AE_OK; |
704 | acpi_handle temp = NULL; | |
1da177e4 LT |
705 | |
706 | ACPI_FUNCTION_TRACE("acpi_bus_get_flags"); | |
707 | ||
708 | /* Presence of _STA indicates 'dynamic_status' */ | |
709 | status = acpi_get_handle(device->handle, "_STA", &temp); | |
710 | if (ACPI_SUCCESS(status)) | |
711 | device->flags.dynamic_status = 1; | |
712 | ||
713 | /* Presence of _CID indicates 'compatible_ids' */ | |
714 | status = acpi_get_handle(device->handle, "_CID", &temp); | |
715 | if (ACPI_SUCCESS(status)) | |
716 | device->flags.compatible_ids = 1; | |
717 | ||
718 | /* Presence of _RMV indicates 'removable' */ | |
719 | status = acpi_get_handle(device->handle, "_RMV", &temp); | |
720 | if (ACPI_SUCCESS(status)) | |
721 | device->flags.removable = 1; | |
722 | ||
723 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
724 | status = acpi_get_handle(device->handle, "_EJD", &temp); | |
725 | if (ACPI_SUCCESS(status)) | |
726 | device->flags.ejectable = 1; | |
727 | else { | |
728 | status = acpi_get_handle(device->handle, "_EJ0", &temp); | |
729 | if (ACPI_SUCCESS(status)) | |
730 | device->flags.ejectable = 1; | |
731 | } | |
732 | ||
733 | /* Presence of _LCK indicates 'lockable' */ | |
734 | status = acpi_get_handle(device->handle, "_LCK", &temp); | |
735 | if (ACPI_SUCCESS(status)) | |
736 | device->flags.lockable = 1; | |
737 | ||
738 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ | |
739 | status = acpi_get_handle(device->handle, "_PS0", &temp); | |
740 | if (ACPI_FAILURE(status)) | |
741 | status = acpi_get_handle(device->handle, "_PR0", &temp); | |
742 | if (ACPI_SUCCESS(status)) | |
743 | device->flags.power_manageable = 1; | |
744 | ||
745 | /* Presence of _PRW indicates wake capable */ | |
746 | status = acpi_get_handle(device->handle, "_PRW", &temp); | |
747 | if (ACPI_SUCCESS(status)) | |
748 | device->flags.wake_capable = 1; | |
749 | ||
750 | /* TBD: Peformance management */ | |
751 | ||
752 | return_VALUE(0); | |
753 | } | |
754 | ||
4be44fcd LB |
755 | static void acpi_device_get_busid(struct acpi_device *device, |
756 | acpi_handle handle, int type) | |
1da177e4 | 757 | { |
4be44fcd LB |
758 | char bus_id[5] = { '?', 0 }; |
759 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
760 | int i = 0; | |
1da177e4 LT |
761 | |
762 | /* | |
763 | * Bus ID | |
764 | * ------ | |
765 | * The device's Bus ID is simply the object name. | |
766 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
767 | */ | |
768 | switch (type) { | |
769 | case ACPI_BUS_TYPE_SYSTEM: | |
770 | strcpy(device->pnp.bus_id, "ACPI"); | |
771 | break; | |
772 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
773 | strcpy(device->pnp.bus_id, "PWRF"); | |
774 | break; | |
775 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
776 | strcpy(device->pnp.bus_id, "SLPF"); | |
777 | break; | |
778 | default: | |
779 | acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer); | |
780 | /* Clean up trailing underscores (if any) */ | |
781 | for (i = 3; i > 1; i--) { | |
782 | if (bus_id[i] == '_') | |
783 | bus_id[i] = '\0'; | |
784 | else | |
785 | break; | |
786 | } | |
787 | strcpy(device->pnp.bus_id, bus_id); | |
788 | break; | |
789 | } | |
790 | } | |
791 | ||
4be44fcd LB |
792 | static void acpi_device_set_id(struct acpi_device *device, |
793 | struct acpi_device *parent, acpi_handle handle, | |
794 | int type) | |
1da177e4 | 795 | { |
4be44fcd LB |
796 | struct acpi_device_info *info; |
797 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
798 | char *hid = NULL; | |
799 | char *uid = NULL; | |
1da177e4 | 800 | struct acpi_compatible_id_list *cid_list = NULL; |
4be44fcd | 801 | acpi_status status; |
1da177e4 LT |
802 | |
803 | switch (type) { | |
804 | case ACPI_BUS_TYPE_DEVICE: | |
805 | status = acpi_get_object_info(handle, &buffer); | |
806 | if (ACPI_FAILURE(status)) { | |
4be44fcd | 807 | printk("%s: Error reading device info\n", __FUNCTION__); |
1da177e4 LT |
808 | return; |
809 | } | |
810 | ||
811 | info = buffer.pointer; | |
812 | if (info->valid & ACPI_VALID_HID) | |
813 | hid = info->hardware_id.value; | |
814 | if (info->valid & ACPI_VALID_UID) | |
815 | uid = info->unique_id.value; | |
816 | if (info->valid & ACPI_VALID_CID) | |
817 | cid_list = &info->compatibility_id; | |
818 | if (info->valid & ACPI_VALID_ADR) { | |
819 | device->pnp.bus_address = info->address; | |
820 | device->flags.bus_address = 1; | |
821 | } | |
822 | break; | |
823 | case ACPI_BUS_TYPE_POWER: | |
824 | hid = ACPI_POWER_HID; | |
825 | break; | |
826 | case ACPI_BUS_TYPE_PROCESSOR: | |
827 | hid = ACPI_PROCESSOR_HID; | |
828 | break; | |
829 | case ACPI_BUS_TYPE_SYSTEM: | |
830 | hid = ACPI_SYSTEM_HID; | |
831 | break; | |
832 | case ACPI_BUS_TYPE_THERMAL: | |
833 | hid = ACPI_THERMAL_HID; | |
834 | break; | |
835 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
836 | hid = ACPI_BUTTON_HID_POWERF; | |
837 | break; | |
838 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
839 | hid = ACPI_BUTTON_HID_SLEEPF; | |
840 | break; | |
841 | } | |
842 | ||
843 | /* | |
844 | * \_SB | |
845 | * ---- | |
846 | * Fix for the system root bus device -- the only root-level device. | |
847 | */ | |
848 | if ((parent == ACPI_ROOT_OBJECT) && (type == ACPI_BUS_TYPE_DEVICE)) { | |
849 | hid = ACPI_BUS_HID; | |
850 | strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME); | |
851 | strcpy(device->pnp.device_class, ACPI_BUS_CLASS); | |
852 | } | |
853 | ||
854 | if (hid) { | |
855 | strcpy(device->pnp.hardware_id, hid); | |
856 | device->flags.hardware_id = 1; | |
857 | } | |
858 | if (uid) { | |
859 | strcpy(device->pnp.unique_id, uid); | |
860 | device->flags.unique_id = 1; | |
861 | } | |
862 | if (cid_list) { | |
863 | device->pnp.cid_list = kmalloc(cid_list->size, GFP_KERNEL); | |
864 | if (device->pnp.cid_list) | |
865 | memcpy(device->pnp.cid_list, cid_list, cid_list->size); | |
866 | else | |
867 | printk(KERN_ERR "Memory allocation error\n"); | |
868 | } | |
869 | ||
870 | acpi_os_free(buffer.pointer); | |
871 | } | |
872 | ||
4be44fcd | 873 | static int acpi_device_set_context(struct acpi_device *device, int type) |
1da177e4 LT |
874 | { |
875 | acpi_status status = AE_OK; | |
876 | int result = 0; | |
877 | /* | |
878 | * Context | |
879 | * ------- | |
880 | * Attach this 'struct acpi_device' to the ACPI object. This makes | |
881 | * resolutions from handle->device very efficient. Note that we need | |
882 | * to be careful with fixed-feature devices as they all attach to the | |
883 | * root object. | |
884 | */ | |
4be44fcd | 885 | if (type != ACPI_BUS_TYPE_POWER_BUTTON && |
1da177e4 LT |
886 | type != ACPI_BUS_TYPE_SLEEP_BUTTON) { |
887 | status = acpi_attach_data(device->handle, | |
4be44fcd | 888 | acpi_bus_data_handler, device); |
1da177e4 LT |
889 | |
890 | if (ACPI_FAILURE(status)) { | |
891 | printk("Error attaching device data\n"); | |
892 | result = -ENODEV; | |
893 | } | |
894 | } | |
895 | return result; | |
896 | } | |
897 | ||
4be44fcd LB |
898 | static void acpi_device_get_debug_info(struct acpi_device *device, |
899 | acpi_handle handle, int type) | |
1da177e4 LT |
900 | { |
901 | #ifdef CONFIG_ACPI_DEBUG_OUTPUT | |
4be44fcd LB |
902 | char *type_string = NULL; |
903 | char name[80] = { '?', '\0' }; | |
904 | struct acpi_buffer buffer = { sizeof(name), name }; | |
1da177e4 LT |
905 | |
906 | switch (type) { | |
907 | case ACPI_BUS_TYPE_DEVICE: | |
908 | type_string = "Device"; | |
909 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
910 | break; | |
911 | case ACPI_BUS_TYPE_POWER: | |
912 | type_string = "Power Resource"; | |
913 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
914 | break; | |
915 | case ACPI_BUS_TYPE_PROCESSOR: | |
916 | type_string = "Processor"; | |
917 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
918 | break; | |
919 | case ACPI_BUS_TYPE_SYSTEM: | |
920 | type_string = "System"; | |
921 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
922 | break; | |
923 | case ACPI_BUS_TYPE_THERMAL: | |
924 | type_string = "Thermal Zone"; | |
925 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
926 | break; | |
927 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
928 | type_string = "Power Button"; | |
929 | sprintf(name, "PWRB"); | |
930 | break; | |
931 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
932 | type_string = "Sleep Button"; | |
933 | sprintf(name, "SLPB"); | |
934 | break; | |
935 | } | |
936 | ||
937 | printk(KERN_DEBUG "Found %s %s [%p]\n", type_string, name, handle); | |
4be44fcd | 938 | #endif /*CONFIG_ACPI_DEBUG_OUTPUT */ |
1da177e4 LT |
939 | } |
940 | ||
4be44fcd | 941 | static int acpi_bus_remove(struct acpi_device *dev, int rmdevice) |
1da177e4 | 942 | { |
4be44fcd LB |
943 | int result = 0; |
944 | struct acpi_driver *driver; | |
945 | ||
1da177e4 LT |
946 | ACPI_FUNCTION_TRACE("acpi_bus_remove"); |
947 | ||
948 | if (!dev) | |
949 | return_VALUE(-EINVAL); | |
950 | ||
951 | driver = dev->driver; | |
952 | ||
953 | if ((driver) && (driver->ops.remove)) { | |
954 | ||
955 | if (driver->ops.stop) { | |
956 | result = driver->ops.stop(dev, ACPI_BUS_REMOVAL_EJECT); | |
957 | if (result) | |
958 | return_VALUE(result); | |
959 | } | |
960 | ||
961 | result = dev->driver->ops.remove(dev, ACPI_BUS_REMOVAL_EJECT); | |
962 | if (result) { | |
963 | return_VALUE(result); | |
964 | } | |
965 | ||
966 | atomic_dec(&dev->driver->references); | |
967 | dev->driver = NULL; | |
968 | acpi_driver_data(dev) = NULL; | |
969 | } | |
970 | ||
971 | if (!rmdevice) | |
972 | return_VALUE(0); | |
973 | ||
974 | if (dev->flags.bus_address) { | |
975 | if ((dev->parent) && (dev->parent->ops.unbind)) | |
976 | dev->parent->ops.unbind(dev); | |
977 | } | |
4be44fcd | 978 | |
1da177e4 LT |
979 | acpi_device_unregister(dev, ACPI_BUS_REMOVAL_EJECT); |
980 | ||
981 | return_VALUE(0); | |
982 | } | |
983 | ||
3fb02738 | 984 | static int |
4be44fcd LB |
985 | acpi_add_single_object(struct acpi_device **child, |
986 | struct acpi_device *parent, acpi_handle handle, int type) | |
1da177e4 | 987 | { |
4be44fcd LB |
988 | int result = 0; |
989 | struct acpi_device *device = NULL; | |
1da177e4 | 990 | |
3fb02738 | 991 | ACPI_FUNCTION_TRACE("acpi_add_single_object"); |
1da177e4 LT |
992 | |
993 | if (!child) | |
994 | return_VALUE(-EINVAL); | |
995 | ||
996 | device = kmalloc(sizeof(struct acpi_device), GFP_KERNEL); | |
997 | if (!device) { | |
998 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Memory allocation error\n")); | |
999 | return_VALUE(-ENOMEM); | |
1000 | } | |
1001 | memset(device, 0, sizeof(struct acpi_device)); | |
1002 | ||
1003 | device->handle = handle; | |
1004 | device->parent = parent; | |
1005 | ||
4be44fcd | 1006 | acpi_device_get_busid(device, handle, type); |
1da177e4 LT |
1007 | |
1008 | /* | |
1009 | * Flags | |
1010 | * ----- | |
1011 | * Get prior to calling acpi_bus_get_status() so we know whether | |
1012 | * or not _STA is present. Note that we only look for object | |
1013 | * handles -- cannot evaluate objects until we know the device is | |
1014 | * present and properly initialized. | |
1015 | */ | |
1016 | result = acpi_bus_get_flags(device); | |
1017 | if (result) | |
1018 | goto end; | |
1019 | ||
1020 | /* | |
1021 | * Status | |
1022 | * ------ | |
6940faba KT |
1023 | * See if the device is present. We always assume that non-Device |
1024 | * and non-Processor objects (e.g. thermal zones, power resources, | |
1025 | * etc.) are present, functioning, etc. (at least when parent object | |
1026 | * is present). Note that _STA has a different meaning for some | |
1027 | * objects (e.g. power resources) so we need to be careful how we use | |
1028 | * it. | |
1da177e4 LT |
1029 | */ |
1030 | switch (type) { | |
6940faba | 1031 | case ACPI_BUS_TYPE_PROCESSOR: |
1da177e4 LT |
1032 | case ACPI_BUS_TYPE_DEVICE: |
1033 | result = acpi_bus_get_status(device); | |
1034 | if (ACPI_FAILURE(result) || !device->status.present) { | |
1035 | result = -ENOENT; | |
1036 | goto end; | |
1037 | } | |
1038 | break; | |
1039 | default: | |
1040 | STRUCT_TO_INT(device->status) = 0x0F; | |
1041 | break; | |
1042 | } | |
1043 | ||
1044 | /* | |
1045 | * Initialize Device | |
1046 | * ----------------- | |
1047 | * TBD: Synch with Core's enumeration/initialization process. | |
1048 | */ | |
1049 | ||
1050 | /* | |
1051 | * Hardware ID, Unique ID, & Bus Address | |
1052 | * ------------------------------------- | |
1053 | */ | |
4be44fcd | 1054 | acpi_device_set_id(device, parent, handle, type); |
1da177e4 LT |
1055 | |
1056 | /* | |
1057 | * Power Management | |
1058 | * ---------------- | |
1059 | */ | |
1060 | if (device->flags.power_manageable) { | |
1061 | result = acpi_bus_get_power_flags(device); | |
1062 | if (result) | |
1063 | goto end; | |
1064 | } | |
1065 | ||
4be44fcd | 1066 | /* |
1da177e4 LT |
1067 | * Wakeup device management |
1068 | *----------------------- | |
1069 | */ | |
1070 | if (device->flags.wake_capable) { | |
1071 | result = acpi_bus_get_wakeup_device_flags(device); | |
1072 | if (result) | |
1073 | goto end; | |
1074 | } | |
1075 | ||
1076 | /* | |
1077 | * Performance Management | |
1078 | * ---------------------- | |
1079 | */ | |
1080 | if (device->flags.performance_manageable) { | |
1081 | result = acpi_bus_get_perf_flags(device); | |
1082 | if (result) | |
1083 | goto end; | |
1084 | } | |
1085 | ||
4be44fcd | 1086 | if ((result = acpi_device_set_context(device, type))) |
1da177e4 LT |
1087 | goto end; |
1088 | ||
4be44fcd | 1089 | acpi_device_get_debug_info(device, handle, type); |
1da177e4 | 1090 | |
4be44fcd | 1091 | acpi_device_register(device, parent); |
1da177e4 LT |
1092 | |
1093 | /* | |
1094 | * Bind _ADR-Based Devices | |
1095 | * ----------------------- | |
1096 | * If there's a a bus address (_ADR) then we utilize the parent's | |
1097 | * 'bind' function (if exists) to bind the ACPI- and natively- | |
1098 | * enumerated device representations. | |
1099 | */ | |
1100 | if (device->flags.bus_address) { | |
1101 | if (device->parent && device->parent->ops.bind) | |
1102 | device->parent->ops.bind(device); | |
1103 | } | |
1104 | ||
1105 | /* | |
1106 | * Locate & Attach Driver | |
1107 | * ---------------------- | |
1108 | * If there's a hardware id (_HID) or compatible ids (_CID) we check | |
1109 | * to see if there's a driver installed for this kind of device. Note | |
1110 | * that drivers can install before or after a device is enumerated. | |
1111 | * | |
1112 | * TBD: Assumes LDM provides driver hot-plug capability. | |
1113 | */ | |
3fb02738 | 1114 | result = acpi_bus_find_driver(device); |
1da177e4 | 1115 | |
4be44fcd | 1116 | end: |
1da177e4 LT |
1117 | if (!result) |
1118 | *child = device; | |
1119 | else { | |
1120 | if (device->pnp.cid_list) | |
1121 | kfree(device->pnp.cid_list); | |
1122 | kfree(device); | |
1123 | } | |
1124 | ||
1125 | return_VALUE(result); | |
1126 | } | |
1da177e4 | 1127 | |
4be44fcd | 1128 | static int acpi_bus_scan(struct acpi_device *start, struct acpi_bus_ops *ops) |
1da177e4 | 1129 | { |
4be44fcd LB |
1130 | acpi_status status = AE_OK; |
1131 | struct acpi_device *parent = NULL; | |
1132 | struct acpi_device *child = NULL; | |
1133 | acpi_handle phandle = NULL; | |
1134 | acpi_handle chandle = NULL; | |
1135 | acpi_object_type type = 0; | |
1136 | u32 level = 1; | |
1da177e4 LT |
1137 | |
1138 | ACPI_FUNCTION_TRACE("acpi_bus_scan"); | |
1139 | ||
1140 | if (!start) | |
1141 | return_VALUE(-EINVAL); | |
1142 | ||
1143 | parent = start; | |
1144 | phandle = start->handle; | |
4be44fcd | 1145 | |
1da177e4 LT |
1146 | /* |
1147 | * Parse through the ACPI namespace, identify all 'devices', and | |
1148 | * create a new 'struct acpi_device' for each. | |
1149 | */ | |
1150 | while ((level > 0) && parent) { | |
1151 | ||
1152 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, | |
4be44fcd | 1153 | chandle, &chandle); |
1da177e4 LT |
1154 | |
1155 | /* | |
1156 | * If this scope is exhausted then move our way back up. | |
1157 | */ | |
1158 | if (ACPI_FAILURE(status)) { | |
1159 | level--; | |
1160 | chandle = phandle; | |
1161 | acpi_get_parent(phandle, &phandle); | |
1162 | if (parent->parent) | |
1163 | parent = parent->parent; | |
1164 | continue; | |
1165 | } | |
1166 | ||
1167 | status = acpi_get_type(chandle, &type); | |
1168 | if (ACPI_FAILURE(status)) | |
1169 | continue; | |
1170 | ||
1171 | /* | |
1172 | * If this is a scope object then parse it (depth-first). | |
1173 | */ | |
1174 | if (type == ACPI_TYPE_LOCAL_SCOPE) { | |
1175 | level++; | |
1176 | phandle = chandle; | |
1177 | chandle = NULL; | |
1178 | continue; | |
1179 | } | |
1180 | ||
1181 | /* | |
1182 | * We're only interested in objects that we consider 'devices'. | |
1183 | */ | |
1184 | switch (type) { | |
1185 | case ACPI_TYPE_DEVICE: | |
1186 | type = ACPI_BUS_TYPE_DEVICE; | |
1187 | break; | |
1188 | case ACPI_TYPE_PROCESSOR: | |
1189 | type = ACPI_BUS_TYPE_PROCESSOR; | |
1190 | break; | |
1191 | case ACPI_TYPE_THERMAL: | |
1192 | type = ACPI_BUS_TYPE_THERMAL; | |
1193 | break; | |
1194 | case ACPI_TYPE_POWER: | |
1195 | type = ACPI_BUS_TYPE_POWER; | |
1196 | break; | |
1197 | default: | |
1198 | continue; | |
1199 | } | |
1200 | ||
3fb02738 RS |
1201 | if (ops->acpi_op_add) |
1202 | status = acpi_add_single_object(&child, parent, | |
4be44fcd LB |
1203 | chandle, type); |
1204 | else | |
3fb02738 RS |
1205 | status = acpi_bus_get_device(chandle, &child); |
1206 | ||
4be44fcd LB |
1207 | if (ACPI_FAILURE(status)) |
1208 | continue; | |
3fb02738 RS |
1209 | |
1210 | if (ops->acpi_op_start) { | |
1211 | status = acpi_start_single_object(child); | |
1212 | if (ACPI_FAILURE(status)) | |
1213 | continue; | |
1214 | } | |
1da177e4 LT |
1215 | |
1216 | /* | |
1217 | * If the device is present, enabled, and functioning then | |
1218 | * parse its scope (depth-first). Note that we need to | |
1219 | * represent absent devices to facilitate PnP notifications | |
1220 | * -- but only the subtree head (not all of its children, | |
1221 | * which will be enumerated when the parent is inserted). | |
1222 | * | |
1223 | * TBD: Need notifications and other detection mechanisms | |
4be44fcd | 1224 | * in place before we can fully implement this. |
1da177e4 LT |
1225 | */ |
1226 | if (child->status.present) { | |
1227 | status = acpi_get_next_object(ACPI_TYPE_ANY, chandle, | |
1228 | NULL, NULL); | |
1229 | if (ACPI_SUCCESS(status)) { | |
1230 | level++; | |
1231 | phandle = chandle; | |
1232 | chandle = NULL; | |
1233 | parent = child; | |
1234 | } | |
1235 | } | |
1236 | } | |
1237 | ||
1238 | return_VALUE(0); | |
1239 | } | |
1da177e4 | 1240 | |
3fb02738 | 1241 | int |
4be44fcd LB |
1242 | acpi_bus_add(struct acpi_device **child, |
1243 | struct acpi_device *parent, acpi_handle handle, int type) | |
3fb02738 RS |
1244 | { |
1245 | int result; | |
1246 | struct acpi_bus_ops ops; | |
1247 | ||
1248 | ACPI_FUNCTION_TRACE("acpi_bus_add"); | |
1249 | ||
1250 | result = acpi_add_single_object(child, parent, handle, type); | |
1251 | if (!result) { | |
1252 | memset(&ops, 0, sizeof(ops)); | |
1253 | ops.acpi_op_add = 1; | |
1254 | result = acpi_bus_scan(*child, &ops); | |
1255 | } | |
1256 | return_VALUE(result); | |
1257 | } | |
4be44fcd | 1258 | |
3fb02738 RS |
1259 | EXPORT_SYMBOL(acpi_bus_add); |
1260 | ||
4be44fcd | 1261 | int acpi_bus_start(struct acpi_device *device) |
3fb02738 RS |
1262 | { |
1263 | int result; | |
1264 | struct acpi_bus_ops ops; | |
1265 | ||
1266 | ACPI_FUNCTION_TRACE("acpi_bus_start"); | |
1267 | ||
1268 | if (!device) | |
1269 | return_VALUE(-EINVAL); | |
1270 | ||
1271 | result = acpi_start_single_object(device); | |
1272 | if (!result) { | |
1273 | memset(&ops, 0, sizeof(ops)); | |
1274 | ops.acpi_op_start = 1; | |
1275 | result = acpi_bus_scan(device, &ops); | |
1276 | } | |
1277 | return_VALUE(result); | |
1278 | } | |
4be44fcd | 1279 | |
3fb02738 | 1280 | EXPORT_SYMBOL(acpi_bus_start); |
1da177e4 | 1281 | |
4be44fcd | 1282 | static int acpi_bus_trim(struct acpi_device *start, int rmdevice) |
1da177e4 | 1283 | { |
4be44fcd LB |
1284 | acpi_status status; |
1285 | struct acpi_device *parent, *child; | |
1286 | acpi_handle phandle, chandle; | |
1287 | acpi_object_type type; | |
1288 | u32 level = 1; | |
1289 | int err = 0; | |
1290 | ||
1291 | parent = start; | |
1da177e4 LT |
1292 | phandle = start->handle; |
1293 | child = chandle = NULL; | |
1294 | ||
1295 | while ((level > 0) && parent && (!err)) { | |
1296 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, | |
4be44fcd | 1297 | chandle, &chandle); |
1da177e4 LT |
1298 | |
1299 | /* | |
1300 | * If this scope is exhausted then move our way back up. | |
1301 | */ | |
1302 | if (ACPI_FAILURE(status)) { | |
1303 | level--; | |
1304 | chandle = phandle; | |
1305 | acpi_get_parent(phandle, &phandle); | |
1306 | child = parent; | |
1307 | parent = parent->parent; | |
1308 | ||
1309 | if (level == 0) | |
1310 | err = acpi_bus_remove(child, rmdevice); | |
1311 | else | |
1312 | err = acpi_bus_remove(child, 1); | |
1313 | ||
1314 | continue; | |
1315 | } | |
1316 | ||
1317 | status = acpi_get_type(chandle, &type); | |
1318 | if (ACPI_FAILURE(status)) { | |
1319 | continue; | |
1320 | } | |
1321 | /* | |
1322 | * If there is a device corresponding to chandle then | |
1323 | * parse it (depth-first). | |
1324 | */ | |
1325 | if (acpi_bus_get_device(chandle, &child) == 0) { | |
1326 | level++; | |
1327 | phandle = chandle; | |
1328 | chandle = NULL; | |
1329 | parent = child; | |
1330 | } | |
1331 | continue; | |
1332 | } | |
1333 | return err; | |
1334 | } | |
1335 | ||
4be44fcd | 1336 | static int acpi_bus_scan_fixed(struct acpi_device *root) |
1da177e4 | 1337 | { |
4be44fcd LB |
1338 | int result = 0; |
1339 | struct acpi_device *device = NULL; | |
1da177e4 LT |
1340 | |
1341 | ACPI_FUNCTION_TRACE("acpi_bus_scan_fixed"); | |
1342 | ||
1343 | if (!root) | |
1344 | return_VALUE(-ENODEV); | |
1345 | ||
1346 | /* | |
1347 | * Enumerate all fixed-feature devices. | |
1348 | */ | |
3fb02738 RS |
1349 | if (acpi_fadt.pwr_button == 0) { |
1350 | result = acpi_add_single_object(&device, acpi_root, | |
4be44fcd LB |
1351 | NULL, |
1352 | ACPI_BUS_TYPE_POWER_BUTTON); | |
3fb02738 RS |
1353 | if (!result) |
1354 | result = acpi_start_single_object(device); | |
1355 | } | |
1da177e4 | 1356 | |
3fb02738 RS |
1357 | if (acpi_fadt.sleep_button == 0) { |
1358 | result = acpi_add_single_object(&device, acpi_root, | |
4be44fcd LB |
1359 | NULL, |
1360 | ACPI_BUS_TYPE_SLEEP_BUTTON); | |
3fb02738 RS |
1361 | if (!result) |
1362 | result = acpi_start_single_object(device); | |
1363 | } | |
1da177e4 LT |
1364 | |
1365 | return_VALUE(result); | |
1366 | } | |
1367 | ||
1da177e4 LT |
1368 | static int __init acpi_scan_init(void) |
1369 | { | |
1370 | int result; | |
3fb02738 | 1371 | struct acpi_bus_ops ops; |
1da177e4 LT |
1372 | |
1373 | ACPI_FUNCTION_TRACE("acpi_scan_init"); | |
1374 | ||
1375 | if (acpi_disabled) | |
1376 | return_VALUE(0); | |
1377 | ||
1378 | kset_register(&acpi_namespace_kset); | |
1379 | ||
1380 | /* | |
1381 | * Create the root device in the bus's device tree | |
1382 | */ | |
3fb02738 | 1383 | result = acpi_add_single_object(&acpi_root, NULL, ACPI_ROOT_OBJECT, |
4be44fcd | 1384 | ACPI_BUS_TYPE_SYSTEM); |
1da177e4 LT |
1385 | if (result) |
1386 | goto Done; | |
1387 | ||
3fb02738 RS |
1388 | result = acpi_start_single_object(acpi_root); |
1389 | ||
1da177e4 LT |
1390 | /* |
1391 | * Enumerate devices in the ACPI namespace. | |
1392 | */ | |
1393 | result = acpi_bus_scan_fixed(acpi_root); | |
3fb02738 RS |
1394 | if (!result) { |
1395 | memset(&ops, 0, sizeof(ops)); | |
1396 | ops.acpi_op_add = 1; | |
1397 | ops.acpi_op_start = 1; | |
1398 | result = acpi_bus_scan(acpi_root, &ops); | |
1399 | } | |
1da177e4 LT |
1400 | |
1401 | if (result) | |
1402 | acpi_device_unregister(acpi_root, ACPI_BUS_REMOVAL_NORMAL); | |
1403 | ||
4be44fcd | 1404 | Done: |
1da177e4 LT |
1405 | return_VALUE(result); |
1406 | } | |
1407 | ||
1408 | subsys_initcall(acpi_scan_init); |