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 | ||
1da177e4 | 26 | |
4be44fcd | 27 | static void acpi_device_release(struct kobject *kobj) |
1da177e4 | 28 | { |
4be44fcd | 29 | struct acpi_device *dev = container_of(kobj, struct acpi_device, kobj); |
6044ec88 | 30 | kfree(dev->pnp.cid_list); |
1da177e4 LT |
31 | kfree(dev); |
32 | } | |
33 | ||
34 | struct acpi_device_attribute { | |
35 | struct attribute attr; | |
4be44fcd LB |
36 | ssize_t(*show) (struct acpi_device *, char *); |
37 | ssize_t(*store) (struct acpi_device *, const char *, size_t); | |
1da177e4 LT |
38 | }; |
39 | ||
40 | typedef void acpi_device_sysfs_files(struct kobject *, | |
4be44fcd | 41 | const struct attribute *); |
1da177e4 LT |
42 | |
43 | static void setup_sys_fs_device_files(struct acpi_device *dev, | |
4be44fcd | 44 | acpi_device_sysfs_files * func); |
1da177e4 LT |
45 | |
46 | #define create_sysfs_device_files(dev) \ | |
47 | setup_sys_fs_device_files(dev, (acpi_device_sysfs_files *)&sysfs_create_file) | |
48 | #define remove_sysfs_device_files(dev) \ | |
49 | setup_sys_fs_device_files(dev, (acpi_device_sysfs_files *)&sysfs_remove_file) | |
50 | ||
1da177e4 LT |
51 | #define to_acpi_device(n) container_of(n, struct acpi_device, kobj) |
52 | #define to_handle_attr(n) container_of(n, struct acpi_device_attribute, attr); | |
53 | ||
54 | static ssize_t acpi_device_attr_show(struct kobject *kobj, | |
4be44fcd | 55 | struct attribute *attr, char *buf) |
1da177e4 LT |
56 | { |
57 | struct acpi_device *device = to_acpi_device(kobj); | |
58 | struct acpi_device_attribute *attribute = to_handle_attr(attr); | |
70f2817a | 59 | return attribute->show ? attribute->show(device, buf) : -EIO; |
1da177e4 LT |
60 | } |
61 | static ssize_t acpi_device_attr_store(struct kobject *kobj, | |
4be44fcd LB |
62 | struct attribute *attr, const char *buf, |
63 | size_t len) | |
1da177e4 LT |
64 | { |
65 | struct acpi_device *device = to_acpi_device(kobj); | |
66 | struct acpi_device_attribute *attribute = to_handle_attr(attr); | |
70f2817a | 67 | return attribute->store ? attribute->store(device, buf, len) : -EIO; |
1da177e4 LT |
68 | } |
69 | ||
70 | static struct sysfs_ops acpi_device_sysfs_ops = { | |
4be44fcd LB |
71 | .show = acpi_device_attr_show, |
72 | .store = acpi_device_attr_store, | |
1da177e4 LT |
73 | }; |
74 | ||
75 | static struct kobj_type ktype_acpi_ns = { | |
4be44fcd LB |
76 | .sysfs_ops = &acpi_device_sysfs_ops, |
77 | .release = acpi_device_release, | |
1da177e4 LT |
78 | }; |
79 | ||
312c004d | 80 | static int namespace_uevent(struct kset *kset, struct kobject *kobj, |
1da177e4 LT |
81 | char **envp, int num_envp, char *buffer, |
82 | int buffer_size) | |
83 | { | |
84 | struct acpi_device *dev = to_acpi_device(kobj); | |
85 | int i = 0; | |
86 | int len = 0; | |
87 | ||
88 | if (!dev->driver) | |
89 | return 0; | |
90 | ||
312c004d KS |
91 | if (add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &len, |
92 | "PHYSDEVDRIVER=%s", dev->driver->name)) | |
1da177e4 LT |
93 | return -ENOMEM; |
94 | ||
95 | envp[i] = NULL; | |
96 | ||
97 | return 0; | |
98 | } | |
99 | ||
312c004d KS |
100 | static struct kset_uevent_ops namespace_uevent_ops = { |
101 | .uevent = &namespace_uevent, | |
1da177e4 LT |
102 | }; |
103 | ||
104 | static struct kset acpi_namespace_kset = { | |
4be44fcd LB |
105 | .kobj = { |
106 | .name = "namespace", | |
107 | }, | |
1da177e4 | 108 | .subsys = &acpi_subsys, |
4be44fcd | 109 | .ktype = &ktype_acpi_ns, |
312c004d | 110 | .uevent_ops = &namespace_uevent_ops, |
1da177e4 LT |
111 | }; |
112 | ||
4be44fcd LB |
113 | static void acpi_device_register(struct acpi_device *device, |
114 | struct acpi_device *parent) | |
1da177e4 LT |
115 | { |
116 | /* | |
117 | * Linkage | |
118 | * ------- | |
119 | * Link this device to its parent and siblings. | |
120 | */ | |
121 | INIT_LIST_HEAD(&device->children); | |
122 | INIT_LIST_HEAD(&device->node); | |
123 | INIT_LIST_HEAD(&device->g_list); | |
124 | INIT_LIST_HEAD(&device->wakeup_list); | |
125 | ||
126 | spin_lock(&acpi_device_lock); | |
127 | if (device->parent) { | |
128 | list_add_tail(&device->node, &device->parent->children); | |
4be44fcd | 129 | list_add_tail(&device->g_list, &device->parent->g_list); |
1da177e4 | 130 | } else |
4be44fcd | 131 | list_add_tail(&device->g_list, &acpi_device_list); |
1da177e4 | 132 | if (device->wakeup.flags.valid) |
4be44fcd | 133 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); |
1da177e4 LT |
134 | spin_unlock(&acpi_device_lock); |
135 | ||
4be44fcd | 136 | strlcpy(device->kobj.name, device->pnp.bus_id, KOBJ_NAME_LEN); |
1da177e4 LT |
137 | if (parent) |
138 | device->kobj.parent = &parent->kobj; | |
139 | device->kobj.ktype = &ktype_acpi_ns; | |
140 | device->kobj.kset = &acpi_namespace_kset; | |
141 | kobject_register(&device->kobj); | |
142 | create_sysfs_device_files(device); | |
143 | } | |
144 | ||
06ea8e08 | 145 | static void acpi_device_unregister(struct acpi_device *device, int type) |
1da177e4 LT |
146 | { |
147 | spin_lock(&acpi_device_lock); | |
148 | if (device->parent) { | |
149 | list_del(&device->node); | |
150 | list_del(&device->g_list); | |
151 | } else | |
152 | list_del(&device->g_list); | |
153 | ||
154 | list_del(&device->wakeup_list); | |
155 | ||
156 | spin_unlock(&acpi_device_lock); | |
157 | ||
158 | acpi_detach_data(device->handle, acpi_bus_data_handler); | |
159 | remove_sysfs_device_files(device); | |
160 | kobject_unregister(&device->kobj); | |
1da177e4 LT |
161 | } |
162 | ||
4be44fcd | 163 | void acpi_bus_data_handler(acpi_handle handle, u32 function, void *context) |
1da177e4 LT |
164 | { |
165 | ACPI_FUNCTION_TRACE("acpi_bus_data_handler"); | |
166 | ||
167 | /* TBD */ | |
168 | ||
169 | return_VOID; | |
170 | } | |
171 | ||
4be44fcd | 172 | static int acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 173 | { |
4be44fcd LB |
174 | acpi_status status = 0; |
175 | acpi_handle handle = NULL; | |
176 | u32 i = 0; | |
1da177e4 LT |
177 | |
178 | ACPI_FUNCTION_TRACE("acpi_bus_get_power_flags"); | |
179 | ||
180 | /* | |
181 | * Power Management Flags | |
182 | */ | |
183 | status = acpi_get_handle(device->handle, "_PSC", &handle); | |
184 | if (ACPI_SUCCESS(status)) | |
185 | device->power.flags.explicit_get = 1; | |
186 | status = acpi_get_handle(device->handle, "_IRC", &handle); | |
187 | if (ACPI_SUCCESS(status)) | |
188 | device->power.flags.inrush_current = 1; | |
189 | ||
190 | /* | |
191 | * Enumerate supported power management states | |
192 | */ | |
193 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3; i++) { | |
194 | struct acpi_device_power_state *ps = &device->power.states[i]; | |
4be44fcd | 195 | char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' }; |
1da177e4 LT |
196 | |
197 | /* Evaluate "_PRx" to se if power resources are referenced */ | |
198 | acpi_evaluate_reference(device->handle, object_name, NULL, | |
4be44fcd | 199 | &ps->resources); |
1da177e4 LT |
200 | if (ps->resources.count) { |
201 | device->power.flags.power_resources = 1; | |
202 | ps->flags.valid = 1; | |
203 | } | |
204 | ||
205 | /* Evaluate "_PSx" to see if we can do explicit sets */ | |
206 | object_name[2] = 'S'; | |
207 | status = acpi_get_handle(device->handle, object_name, &handle); | |
208 | if (ACPI_SUCCESS(status)) { | |
209 | ps->flags.explicit_set = 1; | |
210 | ps->flags.valid = 1; | |
211 | } | |
212 | ||
213 | /* State is valid if we have some power control */ | |
214 | if (ps->resources.count || ps->flags.explicit_set) | |
215 | ps->flags.valid = 1; | |
216 | ||
4be44fcd | 217 | ps->power = -1; /* Unknown - driver assigned */ |
1da177e4 LT |
218 | ps->latency = -1; /* Unknown - driver assigned */ |
219 | } | |
220 | ||
221 | /* Set defaults for D0 and D3 states (always valid) */ | |
222 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
223 | device->power.states[ACPI_STATE_D0].power = 100; | |
224 | device->power.states[ACPI_STATE_D3].flags.valid = 1; | |
225 | device->power.states[ACPI_STATE_D3].power = 0; | |
226 | ||
227 | /* TBD: System wake support and resource requirements. */ | |
228 | ||
229 | device->power.state = ACPI_STATE_UNKNOWN; | |
230 | ||
231 | return_VALUE(0); | |
232 | } | |
233 | ||
4be44fcd | 234 | int acpi_match_ids(struct acpi_device *device, char *ids) |
1da177e4 | 235 | { |
1da177e4 LT |
236 | if (device->flags.hardware_id) |
237 | if (strstr(ids, device->pnp.hardware_id)) | |
1a365616 | 238 | return 0; |
1da177e4 LT |
239 | |
240 | if (device->flags.compatible_ids) { | |
241 | struct acpi_compatible_id_list *cid_list = device->pnp.cid_list; | |
242 | int i; | |
243 | ||
244 | /* compare multiple _CID entries against driver ids */ | |
4be44fcd | 245 | for (i = 0; i < cid_list->count; i++) { |
1da177e4 | 246 | if (strstr(ids, cid_list->id[i].value)) |
1a365616 | 247 | return 0; |
1da177e4 LT |
248 | } |
249 | } | |
1a365616 | 250 | return -ENOENT; |
1da177e4 LT |
251 | } |
252 | ||
253 | static acpi_status | |
4be44fcd LB |
254 | acpi_bus_extract_wakeup_device_power_package(struct acpi_device *device, |
255 | union acpi_object *package) | |
1da177e4 | 256 | { |
4be44fcd LB |
257 | int i = 0; |
258 | union acpi_object *element = NULL; | |
1da177e4 LT |
259 | |
260 | if (!device || !package || (package->package.count < 2)) | |
261 | return AE_BAD_PARAMETER; | |
262 | ||
263 | element = &(package->package.elements[0]); | |
264 | if (!element) | |
265 | return AE_BAD_PARAMETER; | |
266 | if (element->type == ACPI_TYPE_PACKAGE) { | |
267 | if ((element->package.count < 2) || | |
4be44fcd LB |
268 | (element->package.elements[0].type != |
269 | ACPI_TYPE_LOCAL_REFERENCE) | |
270 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) | |
1da177e4 | 271 | return AE_BAD_DATA; |
4be44fcd LB |
272 | device->wakeup.gpe_device = |
273 | element->package.elements[0].reference.handle; | |
274 | device->wakeup.gpe_number = | |
275 | (u32) element->package.elements[1].integer.value; | |
276 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
1da177e4 | 277 | device->wakeup.gpe_number = element->integer.value; |
4be44fcd | 278 | } else |
1da177e4 LT |
279 | return AE_BAD_DATA; |
280 | ||
281 | element = &(package->package.elements[1]); | |
282 | if (element->type != ACPI_TYPE_INTEGER) { | |
283 | return AE_BAD_DATA; | |
284 | } | |
285 | device->wakeup.sleep_state = element->integer.value; | |
286 | ||
287 | if ((package->package.count - 2) > ACPI_MAX_HANDLES) { | |
288 | return AE_NO_MEMORY; | |
289 | } | |
290 | device->wakeup.resources.count = package->package.count - 2; | |
4be44fcd | 291 | for (i = 0; i < device->wakeup.resources.count; i++) { |
1da177e4 | 292 | element = &(package->package.elements[i + 2]); |
4be44fcd | 293 | if (element->type != ACPI_TYPE_ANY) { |
1da177e4 LT |
294 | return AE_BAD_DATA; |
295 | } | |
296 | ||
297 | device->wakeup.resources.handles[i] = element->reference.handle; | |
298 | } | |
299 | ||
300 | return AE_OK; | |
301 | } | |
302 | ||
4be44fcd | 303 | static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
1da177e4 | 304 | { |
4be44fcd LB |
305 | acpi_status status = 0; |
306 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
307 | union acpi_object *package = NULL; | |
1da177e4 LT |
308 | |
309 | ACPI_FUNCTION_TRACE("acpi_bus_get_wakeup_flags"); | |
310 | ||
311 | /* _PRW */ | |
312 | status = acpi_evaluate_object(device->handle, "_PRW", NULL, &buffer); | |
313 | if (ACPI_FAILURE(status)) { | |
a6fc6720 | 314 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); |
1da177e4 LT |
315 | goto end; |
316 | } | |
317 | ||
4be44fcd | 318 | package = (union acpi_object *)buffer.pointer; |
1da177e4 LT |
319 | status = acpi_bus_extract_wakeup_device_power_package(device, package); |
320 | if (ACPI_FAILURE(status)) { | |
a6fc6720 | 321 | ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package")); |
1da177e4 LT |
322 | goto end; |
323 | } | |
324 | ||
325 | acpi_os_free(buffer.pointer); | |
326 | ||
327 | device->wakeup.flags.valid = 1; | |
4be44fcd | 328 | /* Power button, Lid switch always enable wakeup */ |
1da177e4 LT |
329 | if (!acpi_match_ids(device, "PNP0C0D,PNP0C0C,PNP0C0E")) |
330 | device->wakeup.flags.run_wake = 1; | |
331 | ||
4be44fcd | 332 | end: |
1da177e4 LT |
333 | if (ACPI_FAILURE(status)) |
334 | device->flags.wake_capable = 0; | |
335 | return_VALUE(0); | |
336 | } | |
337 | ||
338 | /* -------------------------------------------------------------------------- | |
312c004d | 339 | ACPI sysfs device file support |
1da177e4 | 340 | -------------------------------------------------------------------------- */ |
4be44fcd LB |
341 | static ssize_t acpi_eject_store(struct acpi_device *device, |
342 | const char *buf, size_t count); | |
1da177e4 LT |
343 | |
344 | #define ACPI_DEVICE_ATTR(_name,_mode,_show,_store) \ | |
345 | static struct acpi_device_attribute acpi_device_attr_##_name = \ | |
346 | __ATTR(_name, _mode, _show, _store) | |
347 | ||
348 | ACPI_DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); | |
349 | ||
350 | /** | |
351 | * setup_sys_fs_device_files - sets up the device files under device namespace | |
67be2dd1 MW |
352 | * @dev: acpi_device object |
353 | * @func: function pointer to create or destroy the device file | |
1da177e4 LT |
354 | */ |
355 | static void | |
4be44fcd LB |
356 | setup_sys_fs_device_files(struct acpi_device *dev, |
357 | acpi_device_sysfs_files * func) | |
1da177e4 | 358 | { |
4be44fcd LB |
359 | acpi_status status; |
360 | acpi_handle temp = NULL; | |
1da177e4 LT |
361 | |
362 | /* | |
363 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
364 | * hot-removal function from userland. | |
365 | */ | |
366 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); | |
367 | if (ACPI_SUCCESS(status)) | |
4be44fcd | 368 | (*(func)) (&dev->kobj, &acpi_device_attr_eject.attr); |
1da177e4 LT |
369 | } |
370 | ||
4be44fcd | 371 | static int acpi_eject_operation(acpi_handle handle, int lockable) |
1da177e4 LT |
372 | { |
373 | struct acpi_object_list arg_list; | |
374 | union acpi_object arg; | |
375 | acpi_status status = AE_OK; | |
376 | ||
377 | /* | |
378 | * TBD: evaluate _PS3? | |
379 | */ | |
380 | ||
381 | if (lockable) { | |
382 | arg_list.count = 1; | |
383 | arg_list.pointer = &arg; | |
384 | arg.type = ACPI_TYPE_INTEGER; | |
385 | arg.integer.value = 0; | |
386 | acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); | |
387 | } | |
388 | ||
389 | arg_list.count = 1; | |
390 | arg_list.pointer = &arg; | |
391 | arg.type = ACPI_TYPE_INTEGER; | |
392 | arg.integer.value = 1; | |
393 | ||
394 | /* | |
395 | * TBD: _EJD support. | |
396 | */ | |
397 | ||
398 | status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); | |
399 | if (ACPI_FAILURE(status)) { | |
4be44fcd | 400 | return (-ENODEV); |
1da177e4 LT |
401 | } |
402 | ||
4be44fcd | 403 | return (0); |
1da177e4 LT |
404 | } |
405 | ||
1da177e4 LT |
406 | static ssize_t |
407 | acpi_eject_store(struct acpi_device *device, const char *buf, size_t count) | |
408 | { | |
4be44fcd LB |
409 | int result; |
410 | int ret = count; | |
411 | int islockable; | |
412 | acpi_status status; | |
413 | acpi_handle handle; | |
414 | acpi_object_type type = 0; | |
1da177e4 LT |
415 | |
416 | if ((!count) || (buf[0] != '1')) { | |
417 | return -EINVAL; | |
418 | } | |
1da177e4 LT |
419 | #ifndef FORCE_EJECT |
420 | if (device->driver == NULL) { | |
421 | ret = -ENODEV; | |
422 | goto err; | |
423 | } | |
424 | #endif | |
425 | status = acpi_get_type(device->handle, &type); | |
4be44fcd | 426 | if (ACPI_FAILURE(status) || (!device->flags.ejectable)) { |
1da177e4 LT |
427 | ret = -ENODEV; |
428 | goto err; | |
429 | } | |
430 | ||
431 | islockable = device->flags.lockable; | |
432 | handle = device->handle; | |
433 | ||
eefa27a9 | 434 | result = acpi_bus_trim(device, 1); |
1da177e4 LT |
435 | |
436 | if (!result) | |
437 | result = acpi_eject_operation(handle, islockable); | |
438 | ||
439 | if (result) { | |
440 | ret = -EBUSY; | |
441 | } | |
4be44fcd | 442 | err: |
1da177e4 LT |
443 | return ret; |
444 | } | |
445 | ||
1da177e4 LT |
446 | /* -------------------------------------------------------------------------- |
447 | Performance Management | |
448 | -------------------------------------------------------------------------- */ | |
449 | ||
4be44fcd | 450 | static int acpi_bus_get_perf_flags(struct acpi_device *device) |
1da177e4 LT |
451 | { |
452 | device->performance.state = ACPI_STATE_UNKNOWN; | |
453 | return 0; | |
454 | } | |
455 | ||
456 | /* -------------------------------------------------------------------------- | |
457 | Driver Management | |
458 | -------------------------------------------------------------------------- */ | |
459 | ||
460 | static LIST_HEAD(acpi_bus_drivers); | |
1da177e4 | 461 | |
1da177e4 | 462 | /** |
d758a8fa RD |
463 | * acpi_bus_match - match device IDs to driver's supported IDs |
464 | * @device: the device that we are trying to match to a driver | |
465 | * @driver: driver whose device id table is being checked | |
466 | * | |
1da177e4 LT |
467 | * Checks the device's hardware (_HID) or compatible (_CID) ids to see if it |
468 | * matches the specified driver's criteria. | |
469 | */ | |
470 | static int | |
4be44fcd | 471 | acpi_bus_match(struct acpi_device *device, struct acpi_driver *driver) |
1da177e4 LT |
472 | { |
473 | if (driver && driver->ops.match) | |
474 | return driver->ops.match(device, driver); | |
475 | return acpi_match_ids(device, driver->ids); | |
476 | } | |
477 | ||
1da177e4 | 478 | /** |
d758a8fa RD |
479 | * acpi_bus_driver_init - add a device to a driver |
480 | * @device: the device to add and initialize | |
481 | * @driver: driver for the device | |
482 | * | |
1da177e4 LT |
483 | * Used to initialize a device via its device driver. Called whenever a |
484 | * driver is bound to a device. Invokes the driver's add() and start() ops. | |
485 | */ | |
486 | static int | |
4be44fcd | 487 | acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) |
1da177e4 | 488 | { |
4be44fcd | 489 | int result = 0; |
1da177e4 LT |
490 | |
491 | ACPI_FUNCTION_TRACE("acpi_bus_driver_init"); | |
492 | ||
493 | if (!device || !driver) | |
494 | return_VALUE(-EINVAL); | |
495 | ||
496 | if (!driver->ops.add) | |
497 | return_VALUE(-ENOSYS); | |
498 | ||
499 | result = driver->ops.add(device); | |
500 | if (result) { | |
501 | device->driver = NULL; | |
502 | acpi_driver_data(device) = NULL; | |
503 | return_VALUE(result); | |
504 | } | |
505 | ||
506 | device->driver = driver; | |
507 | ||
508 | /* | |
509 | * TBD - Configuration Management: Assign resources to device based | |
510 | * upon possible configuration and currently allocated resources. | |
511 | */ | |
512 | ||
4be44fcd LB |
513 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
514 | "Driver successfully bound to device\n")); | |
3fb02738 RS |
515 | return_VALUE(0); |
516 | } | |
517 | ||
8713cbef | 518 | static int acpi_start_single_object(struct acpi_device *device) |
3fb02738 RS |
519 | { |
520 | int result = 0; | |
521 | struct acpi_driver *driver; | |
522 | ||
523 | ACPI_FUNCTION_TRACE("acpi_start_single_object"); | |
524 | ||
525 | if (!(driver = device->driver)) | |
526 | return_VALUE(0); | |
527 | ||
1da177e4 LT |
528 | if (driver->ops.start) { |
529 | result = driver->ops.start(device); | |
530 | if (result && driver->ops.remove) | |
531 | driver->ops.remove(device, ACPI_BUS_REMOVAL_NORMAL); | |
1da177e4 LT |
532 | } |
533 | ||
3fb02738 | 534 | return_VALUE(result); |
1da177e4 LT |
535 | } |
536 | ||
9d9f749b | 537 | static void acpi_driver_attach(struct acpi_driver *drv) |
1da177e4 | 538 | { |
4be44fcd | 539 | struct list_head *node, *next; |
1da177e4 LT |
540 | |
541 | ACPI_FUNCTION_TRACE("acpi_driver_attach"); | |
542 | ||
543 | spin_lock(&acpi_device_lock); | |
544 | list_for_each_safe(node, next, &acpi_device_list) { | |
4be44fcd LB |
545 | struct acpi_device *dev = |
546 | container_of(node, struct acpi_device, g_list); | |
1da177e4 LT |
547 | |
548 | if (dev->driver || !dev->status.present) | |
549 | continue; | |
550 | spin_unlock(&acpi_device_lock); | |
551 | ||
552 | if (!acpi_bus_match(dev, drv)) { | |
553 | if (!acpi_bus_driver_init(dev, drv)) { | |
3fb02738 | 554 | acpi_start_single_object(dev); |
1da177e4 | 555 | atomic_inc(&drv->references); |
4be44fcd LB |
556 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
557 | "Found driver [%s] for device [%s]\n", | |
1da177e4 LT |
558 | drv->name, dev->pnp.bus_id)); |
559 | } | |
560 | } | |
561 | spin_lock(&acpi_device_lock); | |
562 | } | |
563 | spin_unlock(&acpi_device_lock); | |
1da177e4 LT |
564 | } |
565 | ||
06ea8e08 | 566 | static void acpi_driver_detach(struct acpi_driver *drv) |
1da177e4 | 567 | { |
4be44fcd | 568 | struct list_head *node, *next; |
1da177e4 LT |
569 | |
570 | ACPI_FUNCTION_TRACE("acpi_driver_detach"); | |
571 | ||
572 | spin_lock(&acpi_device_lock); | |
4be44fcd LB |
573 | list_for_each_safe(node, next, &acpi_device_list) { |
574 | struct acpi_device *dev = | |
575 | container_of(node, struct acpi_device, g_list); | |
1da177e4 LT |
576 | |
577 | if (dev->driver == drv) { | |
578 | spin_unlock(&acpi_device_lock); | |
579 | if (drv->ops.remove) | |
4be44fcd | 580 | drv->ops.remove(dev, ACPI_BUS_REMOVAL_NORMAL); |
1da177e4 LT |
581 | spin_lock(&acpi_device_lock); |
582 | dev->driver = NULL; | |
583 | dev->driver_data = NULL; | |
584 | atomic_dec(&drv->references); | |
585 | } | |
586 | } | |
587 | spin_unlock(&acpi_device_lock); | |
1da177e4 LT |
588 | } |
589 | ||
590 | /** | |
d758a8fa RD |
591 | * acpi_bus_register_driver - register a driver with the ACPI bus |
592 | * @driver: driver being registered | |
593 | * | |
1da177e4 | 594 | * Registers a driver with the ACPI bus. Searches the namespace for all |
9d9f749b BH |
595 | * devices that match the driver's criteria and binds. Returns zero for |
596 | * success or a negative error status for failure. | |
1da177e4 | 597 | */ |
4be44fcd | 598 | int acpi_bus_register_driver(struct acpi_driver *driver) |
1da177e4 | 599 | { |
1da177e4 LT |
600 | ACPI_FUNCTION_TRACE("acpi_bus_register_driver"); |
601 | ||
602 | if (acpi_disabled) | |
603 | return_VALUE(-ENODEV); | |
604 | ||
1da177e4 LT |
605 | spin_lock(&acpi_device_lock); |
606 | list_add_tail(&driver->node, &acpi_bus_drivers); | |
607 | spin_unlock(&acpi_device_lock); | |
9d9f749b | 608 | acpi_driver_attach(driver); |
1da177e4 | 609 | |
9d9f749b | 610 | return_VALUE(0); |
1da177e4 | 611 | } |
1da177e4 | 612 | |
4be44fcd | 613 | EXPORT_SYMBOL(acpi_bus_register_driver); |
1da177e4 LT |
614 | |
615 | /** | |
d758a8fa RD |
616 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus |
617 | * @driver: driver to unregister | |
618 | * | |
1da177e4 LT |
619 | * Unregisters a driver with the ACPI bus. Searches the namespace for all |
620 | * devices that match the driver's criteria and unbinds. | |
621 | */ | |
06ea8e08 | 622 | void acpi_bus_unregister_driver(struct acpi_driver *driver) |
1da177e4 | 623 | { |
1a365616 BH |
624 | acpi_driver_detach(driver); |
625 | ||
626 | if (!atomic_read(&driver->references)) { | |
627 | spin_lock(&acpi_device_lock); | |
628 | list_del_init(&driver->node); | |
629 | spin_unlock(&acpi_device_lock); | |
630 | } | |
06ea8e08 | 631 | return; |
1da177e4 | 632 | } |
4be44fcd | 633 | |
1da177e4 LT |
634 | EXPORT_SYMBOL(acpi_bus_unregister_driver); |
635 | ||
636 | /** | |
d758a8fa RD |
637 | * acpi_bus_find_driver - check if there is a driver installed for the device |
638 | * @device: device that we are trying to find a supporting driver for | |
639 | * | |
1da177e4 LT |
640 | * Parses the list of registered drivers looking for a driver applicable for |
641 | * the specified device. | |
642 | */ | |
4be44fcd | 643 | static int acpi_bus_find_driver(struct acpi_device *device) |
1da177e4 | 644 | { |
4be44fcd LB |
645 | int result = 0; |
646 | struct list_head *node, *next; | |
1da177e4 LT |
647 | |
648 | ACPI_FUNCTION_TRACE("acpi_bus_find_driver"); | |
649 | ||
650 | spin_lock(&acpi_device_lock); | |
4be44fcd LB |
651 | list_for_each_safe(node, next, &acpi_bus_drivers) { |
652 | struct acpi_driver *driver = | |
653 | container_of(node, struct acpi_driver, node); | |
1da177e4 LT |
654 | |
655 | atomic_inc(&driver->references); | |
656 | spin_unlock(&acpi_device_lock); | |
657 | if (!acpi_bus_match(device, driver)) { | |
658 | result = acpi_bus_driver_init(device, driver); | |
659 | if (!result) | |
660 | goto Done; | |
661 | } | |
662 | atomic_dec(&driver->references); | |
663 | spin_lock(&acpi_device_lock); | |
664 | } | |
665 | spin_unlock(&acpi_device_lock); | |
666 | ||
4be44fcd | 667 | Done: |
1da177e4 LT |
668 | return_VALUE(result); |
669 | } | |
670 | ||
1da177e4 LT |
671 | /* -------------------------------------------------------------------------- |
672 | Device Enumeration | |
673 | -------------------------------------------------------------------------- */ | |
674 | ||
4be44fcd | 675 | static int acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 676 | { |
4be44fcd LB |
677 | acpi_status status = AE_OK; |
678 | acpi_handle temp = NULL; | |
1da177e4 LT |
679 | |
680 | ACPI_FUNCTION_TRACE("acpi_bus_get_flags"); | |
681 | ||
682 | /* Presence of _STA indicates 'dynamic_status' */ | |
683 | status = acpi_get_handle(device->handle, "_STA", &temp); | |
684 | if (ACPI_SUCCESS(status)) | |
685 | device->flags.dynamic_status = 1; | |
686 | ||
687 | /* Presence of _CID indicates 'compatible_ids' */ | |
688 | status = acpi_get_handle(device->handle, "_CID", &temp); | |
689 | if (ACPI_SUCCESS(status)) | |
690 | device->flags.compatible_ids = 1; | |
691 | ||
692 | /* Presence of _RMV indicates 'removable' */ | |
693 | status = acpi_get_handle(device->handle, "_RMV", &temp); | |
694 | if (ACPI_SUCCESS(status)) | |
695 | device->flags.removable = 1; | |
696 | ||
697 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
698 | status = acpi_get_handle(device->handle, "_EJD", &temp); | |
699 | if (ACPI_SUCCESS(status)) | |
700 | device->flags.ejectable = 1; | |
701 | else { | |
702 | status = acpi_get_handle(device->handle, "_EJ0", &temp); | |
703 | if (ACPI_SUCCESS(status)) | |
704 | device->flags.ejectable = 1; | |
705 | } | |
706 | ||
707 | /* Presence of _LCK indicates 'lockable' */ | |
708 | status = acpi_get_handle(device->handle, "_LCK", &temp); | |
709 | if (ACPI_SUCCESS(status)) | |
710 | device->flags.lockable = 1; | |
711 | ||
712 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ | |
713 | status = acpi_get_handle(device->handle, "_PS0", &temp); | |
714 | if (ACPI_FAILURE(status)) | |
715 | status = acpi_get_handle(device->handle, "_PR0", &temp); | |
716 | if (ACPI_SUCCESS(status)) | |
717 | device->flags.power_manageable = 1; | |
718 | ||
719 | /* Presence of _PRW indicates wake capable */ | |
720 | status = acpi_get_handle(device->handle, "_PRW", &temp); | |
721 | if (ACPI_SUCCESS(status)) | |
722 | device->flags.wake_capable = 1; | |
723 | ||
724 | /* TBD: Peformance management */ | |
725 | ||
726 | return_VALUE(0); | |
727 | } | |
728 | ||
4be44fcd LB |
729 | static void acpi_device_get_busid(struct acpi_device *device, |
730 | acpi_handle handle, int type) | |
1da177e4 | 731 | { |
4be44fcd LB |
732 | char bus_id[5] = { '?', 0 }; |
733 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
734 | int i = 0; | |
1da177e4 LT |
735 | |
736 | /* | |
737 | * Bus ID | |
738 | * ------ | |
739 | * The device's Bus ID is simply the object name. | |
740 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
741 | */ | |
742 | switch (type) { | |
743 | case ACPI_BUS_TYPE_SYSTEM: | |
744 | strcpy(device->pnp.bus_id, "ACPI"); | |
745 | break; | |
746 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
747 | strcpy(device->pnp.bus_id, "PWRF"); | |
748 | break; | |
749 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
750 | strcpy(device->pnp.bus_id, "SLPF"); | |
751 | break; | |
752 | default: | |
753 | acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer); | |
754 | /* Clean up trailing underscores (if any) */ | |
755 | for (i = 3; i > 1; i--) { | |
756 | if (bus_id[i] == '_') | |
757 | bus_id[i] = '\0'; | |
758 | else | |
759 | break; | |
760 | } | |
761 | strcpy(device->pnp.bus_id, bus_id); | |
762 | break; | |
763 | } | |
764 | } | |
765 | ||
4be44fcd LB |
766 | static void acpi_device_set_id(struct acpi_device *device, |
767 | struct acpi_device *parent, acpi_handle handle, | |
768 | int type) | |
1da177e4 | 769 | { |
4be44fcd LB |
770 | struct acpi_device_info *info; |
771 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
772 | char *hid = NULL; | |
773 | char *uid = NULL; | |
1da177e4 | 774 | struct acpi_compatible_id_list *cid_list = NULL; |
4be44fcd | 775 | acpi_status status; |
1da177e4 LT |
776 | |
777 | switch (type) { | |
778 | case ACPI_BUS_TYPE_DEVICE: | |
779 | status = acpi_get_object_info(handle, &buffer); | |
780 | if (ACPI_FAILURE(status)) { | |
4be44fcd | 781 | printk("%s: Error reading device info\n", __FUNCTION__); |
1da177e4 LT |
782 | return; |
783 | } | |
784 | ||
785 | info = buffer.pointer; | |
786 | if (info->valid & ACPI_VALID_HID) | |
787 | hid = info->hardware_id.value; | |
788 | if (info->valid & ACPI_VALID_UID) | |
789 | uid = info->unique_id.value; | |
790 | if (info->valid & ACPI_VALID_CID) | |
791 | cid_list = &info->compatibility_id; | |
792 | if (info->valid & ACPI_VALID_ADR) { | |
793 | device->pnp.bus_address = info->address; | |
794 | device->flags.bus_address = 1; | |
795 | } | |
796 | break; | |
797 | case ACPI_BUS_TYPE_POWER: | |
798 | hid = ACPI_POWER_HID; | |
799 | break; | |
800 | case ACPI_BUS_TYPE_PROCESSOR: | |
801 | hid = ACPI_PROCESSOR_HID; | |
802 | break; | |
803 | case ACPI_BUS_TYPE_SYSTEM: | |
804 | hid = ACPI_SYSTEM_HID; | |
805 | break; | |
806 | case ACPI_BUS_TYPE_THERMAL: | |
807 | hid = ACPI_THERMAL_HID; | |
808 | break; | |
809 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
810 | hid = ACPI_BUTTON_HID_POWERF; | |
811 | break; | |
812 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
813 | hid = ACPI_BUTTON_HID_SLEEPF; | |
814 | break; | |
815 | } | |
816 | ||
817 | /* | |
818 | * \_SB | |
819 | * ---- | |
820 | * Fix for the system root bus device -- the only root-level device. | |
821 | */ | |
c51a4de8 | 822 | if (((acpi_handle)parent == ACPI_ROOT_OBJECT) && (type == ACPI_BUS_TYPE_DEVICE)) { |
1da177e4 LT |
823 | hid = ACPI_BUS_HID; |
824 | strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME); | |
825 | strcpy(device->pnp.device_class, ACPI_BUS_CLASS); | |
826 | } | |
827 | ||
828 | if (hid) { | |
829 | strcpy(device->pnp.hardware_id, hid); | |
830 | device->flags.hardware_id = 1; | |
831 | } | |
832 | if (uid) { | |
833 | strcpy(device->pnp.unique_id, uid); | |
834 | device->flags.unique_id = 1; | |
835 | } | |
836 | if (cid_list) { | |
837 | device->pnp.cid_list = kmalloc(cid_list->size, GFP_KERNEL); | |
838 | if (device->pnp.cid_list) | |
839 | memcpy(device->pnp.cid_list, cid_list, cid_list->size); | |
840 | else | |
841 | printk(KERN_ERR "Memory allocation error\n"); | |
842 | } | |
843 | ||
844 | acpi_os_free(buffer.pointer); | |
845 | } | |
846 | ||
4be44fcd | 847 | static int acpi_device_set_context(struct acpi_device *device, int type) |
1da177e4 LT |
848 | { |
849 | acpi_status status = AE_OK; | |
850 | int result = 0; | |
851 | /* | |
852 | * Context | |
853 | * ------- | |
854 | * Attach this 'struct acpi_device' to the ACPI object. This makes | |
855 | * resolutions from handle->device very efficient. Note that we need | |
856 | * to be careful with fixed-feature devices as they all attach to the | |
857 | * root object. | |
858 | */ | |
4be44fcd | 859 | if (type != ACPI_BUS_TYPE_POWER_BUTTON && |
1da177e4 LT |
860 | type != ACPI_BUS_TYPE_SLEEP_BUTTON) { |
861 | status = acpi_attach_data(device->handle, | |
4be44fcd | 862 | acpi_bus_data_handler, device); |
1da177e4 LT |
863 | |
864 | if (ACPI_FAILURE(status)) { | |
865 | printk("Error attaching device data\n"); | |
866 | result = -ENODEV; | |
867 | } | |
868 | } | |
869 | return result; | |
870 | } | |
871 | ||
4be44fcd LB |
872 | static void acpi_device_get_debug_info(struct acpi_device *device, |
873 | acpi_handle handle, int type) | |
1da177e4 LT |
874 | { |
875 | #ifdef CONFIG_ACPI_DEBUG_OUTPUT | |
4be44fcd LB |
876 | char *type_string = NULL; |
877 | char name[80] = { '?', '\0' }; | |
878 | struct acpi_buffer buffer = { sizeof(name), name }; | |
1da177e4 LT |
879 | |
880 | switch (type) { | |
881 | case ACPI_BUS_TYPE_DEVICE: | |
882 | type_string = "Device"; | |
883 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
884 | break; | |
885 | case ACPI_BUS_TYPE_POWER: | |
886 | type_string = "Power Resource"; | |
887 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
888 | break; | |
889 | case ACPI_BUS_TYPE_PROCESSOR: | |
890 | type_string = "Processor"; | |
891 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
892 | break; | |
893 | case ACPI_BUS_TYPE_SYSTEM: | |
894 | type_string = "System"; | |
895 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
896 | break; | |
897 | case ACPI_BUS_TYPE_THERMAL: | |
898 | type_string = "Thermal Zone"; | |
899 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
900 | break; | |
901 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
902 | type_string = "Power Button"; | |
903 | sprintf(name, "PWRB"); | |
904 | break; | |
905 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
906 | type_string = "Sleep Button"; | |
907 | sprintf(name, "SLPB"); | |
908 | break; | |
909 | } | |
910 | ||
911 | printk(KERN_DEBUG "Found %s %s [%p]\n", type_string, name, handle); | |
4be44fcd | 912 | #endif /*CONFIG_ACPI_DEBUG_OUTPUT */ |
1da177e4 LT |
913 | } |
914 | ||
4be44fcd | 915 | static int acpi_bus_remove(struct acpi_device *dev, int rmdevice) |
1da177e4 | 916 | { |
4be44fcd LB |
917 | int result = 0; |
918 | struct acpi_driver *driver; | |
919 | ||
1da177e4 LT |
920 | ACPI_FUNCTION_TRACE("acpi_bus_remove"); |
921 | ||
922 | if (!dev) | |
923 | return_VALUE(-EINVAL); | |
924 | ||
925 | driver = dev->driver; | |
926 | ||
927 | if ((driver) && (driver->ops.remove)) { | |
928 | ||
929 | if (driver->ops.stop) { | |
930 | result = driver->ops.stop(dev, ACPI_BUS_REMOVAL_EJECT); | |
931 | if (result) | |
932 | return_VALUE(result); | |
933 | } | |
934 | ||
935 | result = dev->driver->ops.remove(dev, ACPI_BUS_REMOVAL_EJECT); | |
936 | if (result) { | |
937 | return_VALUE(result); | |
938 | } | |
939 | ||
940 | atomic_dec(&dev->driver->references); | |
941 | dev->driver = NULL; | |
942 | acpi_driver_data(dev) = NULL; | |
943 | } | |
944 | ||
945 | if (!rmdevice) | |
946 | return_VALUE(0); | |
947 | ||
948 | if (dev->flags.bus_address) { | |
949 | if ((dev->parent) && (dev->parent->ops.unbind)) | |
950 | dev->parent->ops.unbind(dev); | |
951 | } | |
4be44fcd | 952 | |
1da177e4 LT |
953 | acpi_device_unregister(dev, ACPI_BUS_REMOVAL_EJECT); |
954 | ||
955 | return_VALUE(0); | |
956 | } | |
957 | ||
3fb02738 | 958 | static int |
4be44fcd LB |
959 | acpi_add_single_object(struct acpi_device **child, |
960 | struct acpi_device *parent, acpi_handle handle, int type) | |
1da177e4 | 961 | { |
4be44fcd LB |
962 | int result = 0; |
963 | struct acpi_device *device = NULL; | |
1da177e4 | 964 | |
3fb02738 | 965 | ACPI_FUNCTION_TRACE("acpi_add_single_object"); |
1da177e4 LT |
966 | |
967 | if (!child) | |
968 | return_VALUE(-EINVAL); | |
969 | ||
970 | device = kmalloc(sizeof(struct acpi_device), GFP_KERNEL); | |
971 | if (!device) { | |
a6fc6720 | 972 | ACPI_ERROR((AE_INFO, "Memory allocation error")); |
1da177e4 LT |
973 | return_VALUE(-ENOMEM); |
974 | } | |
975 | memset(device, 0, sizeof(struct acpi_device)); | |
976 | ||
977 | device->handle = handle; | |
978 | device->parent = parent; | |
979 | ||
4be44fcd | 980 | acpi_device_get_busid(device, handle, type); |
1da177e4 LT |
981 | |
982 | /* | |
983 | * Flags | |
984 | * ----- | |
985 | * Get prior to calling acpi_bus_get_status() so we know whether | |
986 | * or not _STA is present. Note that we only look for object | |
987 | * handles -- cannot evaluate objects until we know the device is | |
988 | * present and properly initialized. | |
989 | */ | |
990 | result = acpi_bus_get_flags(device); | |
991 | if (result) | |
992 | goto end; | |
993 | ||
994 | /* | |
995 | * Status | |
996 | * ------ | |
6940faba KT |
997 | * See if the device is present. We always assume that non-Device |
998 | * and non-Processor objects (e.g. thermal zones, power resources, | |
999 | * etc.) are present, functioning, etc. (at least when parent object | |
1000 | * is present). Note that _STA has a different meaning for some | |
1001 | * objects (e.g. power resources) so we need to be careful how we use | |
1002 | * it. | |
1da177e4 LT |
1003 | */ |
1004 | switch (type) { | |
6940faba | 1005 | case ACPI_BUS_TYPE_PROCESSOR: |
1da177e4 LT |
1006 | case ACPI_BUS_TYPE_DEVICE: |
1007 | result = acpi_bus_get_status(device); | |
1008 | if (ACPI_FAILURE(result) || !device->status.present) { | |
1009 | result = -ENOENT; | |
1010 | goto end; | |
1011 | } | |
1012 | break; | |
1013 | default: | |
1014 | STRUCT_TO_INT(device->status) = 0x0F; | |
1015 | break; | |
1016 | } | |
1017 | ||
1018 | /* | |
1019 | * Initialize Device | |
1020 | * ----------------- | |
1021 | * TBD: Synch with Core's enumeration/initialization process. | |
1022 | */ | |
1023 | ||
1024 | /* | |
1025 | * Hardware ID, Unique ID, & Bus Address | |
1026 | * ------------------------------------- | |
1027 | */ | |
4be44fcd | 1028 | acpi_device_set_id(device, parent, handle, type); |
1da177e4 LT |
1029 | |
1030 | /* | |
1031 | * Power Management | |
1032 | * ---------------- | |
1033 | */ | |
1034 | if (device->flags.power_manageable) { | |
1035 | result = acpi_bus_get_power_flags(device); | |
1036 | if (result) | |
1037 | goto end; | |
1038 | } | |
1039 | ||
4be44fcd | 1040 | /* |
1da177e4 LT |
1041 | * Wakeup device management |
1042 | *----------------------- | |
1043 | */ | |
1044 | if (device->flags.wake_capable) { | |
1045 | result = acpi_bus_get_wakeup_device_flags(device); | |
1046 | if (result) | |
1047 | goto end; | |
1048 | } | |
1049 | ||
1050 | /* | |
1051 | * Performance Management | |
1052 | * ---------------------- | |
1053 | */ | |
1054 | if (device->flags.performance_manageable) { | |
1055 | result = acpi_bus_get_perf_flags(device); | |
1056 | if (result) | |
1057 | goto end; | |
1058 | } | |
1059 | ||
4be44fcd | 1060 | if ((result = acpi_device_set_context(device, type))) |
1da177e4 LT |
1061 | goto end; |
1062 | ||
4be44fcd | 1063 | acpi_device_get_debug_info(device, handle, type); |
1da177e4 | 1064 | |
4be44fcd | 1065 | acpi_device_register(device, parent); |
1da177e4 LT |
1066 | |
1067 | /* | |
1068 | * Bind _ADR-Based Devices | |
1069 | * ----------------------- | |
1070 | * If there's a a bus address (_ADR) then we utilize the parent's | |
1071 | * 'bind' function (if exists) to bind the ACPI- and natively- | |
1072 | * enumerated device representations. | |
1073 | */ | |
1074 | if (device->flags.bus_address) { | |
1075 | if (device->parent && device->parent->ops.bind) | |
1076 | device->parent->ops.bind(device); | |
1077 | } | |
1078 | ||
1079 | /* | |
1080 | * Locate & Attach Driver | |
1081 | * ---------------------- | |
1082 | * If there's a hardware id (_HID) or compatible ids (_CID) we check | |
1083 | * to see if there's a driver installed for this kind of device. Note | |
1084 | * that drivers can install before or after a device is enumerated. | |
1085 | * | |
1086 | * TBD: Assumes LDM provides driver hot-plug capability. | |
1087 | */ | |
bd7ce5b5 | 1088 | acpi_bus_find_driver(device); |
1da177e4 | 1089 | |
4be44fcd | 1090 | end: |
1da177e4 LT |
1091 | if (!result) |
1092 | *child = device; | |
1093 | else { | |
6044ec88 | 1094 | kfree(device->pnp.cid_list); |
1da177e4 LT |
1095 | kfree(device); |
1096 | } | |
1097 | ||
1098 | return_VALUE(result); | |
1099 | } | |
1da177e4 | 1100 | |
4be44fcd | 1101 | static int acpi_bus_scan(struct acpi_device *start, struct acpi_bus_ops *ops) |
1da177e4 | 1102 | { |
4be44fcd LB |
1103 | acpi_status status = AE_OK; |
1104 | struct acpi_device *parent = NULL; | |
1105 | struct acpi_device *child = NULL; | |
1106 | acpi_handle phandle = NULL; | |
1107 | acpi_handle chandle = NULL; | |
1108 | acpi_object_type type = 0; | |
1109 | u32 level = 1; | |
1da177e4 LT |
1110 | |
1111 | ACPI_FUNCTION_TRACE("acpi_bus_scan"); | |
1112 | ||
1113 | if (!start) | |
1114 | return_VALUE(-EINVAL); | |
1115 | ||
1116 | parent = start; | |
1117 | phandle = start->handle; | |
4be44fcd | 1118 | |
1da177e4 LT |
1119 | /* |
1120 | * Parse through the ACPI namespace, identify all 'devices', and | |
1121 | * create a new 'struct acpi_device' for each. | |
1122 | */ | |
1123 | while ((level > 0) && parent) { | |
1124 | ||
1125 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, | |
4be44fcd | 1126 | chandle, &chandle); |
1da177e4 LT |
1127 | |
1128 | /* | |
1129 | * If this scope is exhausted then move our way back up. | |
1130 | */ | |
1131 | if (ACPI_FAILURE(status)) { | |
1132 | level--; | |
1133 | chandle = phandle; | |
1134 | acpi_get_parent(phandle, &phandle); | |
1135 | if (parent->parent) | |
1136 | parent = parent->parent; | |
1137 | continue; | |
1138 | } | |
1139 | ||
1140 | status = acpi_get_type(chandle, &type); | |
1141 | if (ACPI_FAILURE(status)) | |
1142 | continue; | |
1143 | ||
1144 | /* | |
1145 | * If this is a scope object then parse it (depth-first). | |
1146 | */ | |
1147 | if (type == ACPI_TYPE_LOCAL_SCOPE) { | |
1148 | level++; | |
1149 | phandle = chandle; | |
1150 | chandle = NULL; | |
1151 | continue; | |
1152 | } | |
1153 | ||
1154 | /* | |
1155 | * We're only interested in objects that we consider 'devices'. | |
1156 | */ | |
1157 | switch (type) { | |
1158 | case ACPI_TYPE_DEVICE: | |
1159 | type = ACPI_BUS_TYPE_DEVICE; | |
1160 | break; | |
1161 | case ACPI_TYPE_PROCESSOR: | |
1162 | type = ACPI_BUS_TYPE_PROCESSOR; | |
1163 | break; | |
1164 | case ACPI_TYPE_THERMAL: | |
1165 | type = ACPI_BUS_TYPE_THERMAL; | |
1166 | break; | |
1167 | case ACPI_TYPE_POWER: | |
1168 | type = ACPI_BUS_TYPE_POWER; | |
1169 | break; | |
1170 | default: | |
1171 | continue; | |
1172 | } | |
1173 | ||
3fb02738 RS |
1174 | if (ops->acpi_op_add) |
1175 | status = acpi_add_single_object(&child, parent, | |
4be44fcd LB |
1176 | chandle, type); |
1177 | else | |
3fb02738 RS |
1178 | status = acpi_bus_get_device(chandle, &child); |
1179 | ||
4be44fcd LB |
1180 | if (ACPI_FAILURE(status)) |
1181 | continue; | |
3fb02738 RS |
1182 | |
1183 | if (ops->acpi_op_start) { | |
1184 | status = acpi_start_single_object(child); | |
1185 | if (ACPI_FAILURE(status)) | |
1186 | continue; | |
1187 | } | |
1da177e4 LT |
1188 | |
1189 | /* | |
1190 | * If the device is present, enabled, and functioning then | |
1191 | * parse its scope (depth-first). Note that we need to | |
1192 | * represent absent devices to facilitate PnP notifications | |
1193 | * -- but only the subtree head (not all of its children, | |
1194 | * which will be enumerated when the parent is inserted). | |
1195 | * | |
1196 | * TBD: Need notifications and other detection mechanisms | |
4be44fcd | 1197 | * in place before we can fully implement this. |
1da177e4 LT |
1198 | */ |
1199 | if (child->status.present) { | |
1200 | status = acpi_get_next_object(ACPI_TYPE_ANY, chandle, | |
1201 | NULL, NULL); | |
1202 | if (ACPI_SUCCESS(status)) { | |
1203 | level++; | |
1204 | phandle = chandle; | |
1205 | chandle = NULL; | |
1206 | parent = child; | |
1207 | } | |
1208 | } | |
1209 | } | |
1210 | ||
1211 | return_VALUE(0); | |
1212 | } | |
1da177e4 | 1213 | |
3fb02738 | 1214 | int |
4be44fcd LB |
1215 | acpi_bus_add(struct acpi_device **child, |
1216 | struct acpi_device *parent, acpi_handle handle, int type) | |
3fb02738 RS |
1217 | { |
1218 | int result; | |
1219 | struct acpi_bus_ops ops; | |
1220 | ||
1221 | ACPI_FUNCTION_TRACE("acpi_bus_add"); | |
1222 | ||
1223 | result = acpi_add_single_object(child, parent, handle, type); | |
1224 | if (!result) { | |
1225 | memset(&ops, 0, sizeof(ops)); | |
1226 | ops.acpi_op_add = 1; | |
1227 | result = acpi_bus_scan(*child, &ops); | |
1228 | } | |
1229 | return_VALUE(result); | |
1230 | } | |
4be44fcd | 1231 | |
3fb02738 RS |
1232 | EXPORT_SYMBOL(acpi_bus_add); |
1233 | ||
4be44fcd | 1234 | int acpi_bus_start(struct acpi_device *device) |
3fb02738 RS |
1235 | { |
1236 | int result; | |
1237 | struct acpi_bus_ops ops; | |
1238 | ||
1239 | ACPI_FUNCTION_TRACE("acpi_bus_start"); | |
1240 | ||
1241 | if (!device) | |
1242 | return_VALUE(-EINVAL); | |
1243 | ||
1244 | result = acpi_start_single_object(device); | |
1245 | if (!result) { | |
1246 | memset(&ops, 0, sizeof(ops)); | |
1247 | ops.acpi_op_start = 1; | |
1248 | result = acpi_bus_scan(device, &ops); | |
1249 | } | |
1250 | return_VALUE(result); | |
1251 | } | |
4be44fcd | 1252 | |
3fb02738 | 1253 | EXPORT_SYMBOL(acpi_bus_start); |
1da177e4 | 1254 | |
ceaba663 | 1255 | int acpi_bus_trim(struct acpi_device *start, int rmdevice) |
1da177e4 | 1256 | { |
4be44fcd LB |
1257 | acpi_status status; |
1258 | struct acpi_device *parent, *child; | |
1259 | acpi_handle phandle, chandle; | |
1260 | acpi_object_type type; | |
1261 | u32 level = 1; | |
1262 | int err = 0; | |
1263 | ||
1264 | parent = start; | |
1da177e4 LT |
1265 | phandle = start->handle; |
1266 | child = chandle = NULL; | |
1267 | ||
1268 | while ((level > 0) && parent && (!err)) { | |
1269 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, | |
4be44fcd | 1270 | chandle, &chandle); |
1da177e4 LT |
1271 | |
1272 | /* | |
1273 | * If this scope is exhausted then move our way back up. | |
1274 | */ | |
1275 | if (ACPI_FAILURE(status)) { | |
1276 | level--; | |
1277 | chandle = phandle; | |
1278 | acpi_get_parent(phandle, &phandle); | |
1279 | child = parent; | |
1280 | parent = parent->parent; | |
1281 | ||
1282 | if (level == 0) | |
1283 | err = acpi_bus_remove(child, rmdevice); | |
1284 | else | |
1285 | err = acpi_bus_remove(child, 1); | |
1286 | ||
1287 | continue; | |
1288 | } | |
1289 | ||
1290 | status = acpi_get_type(chandle, &type); | |
1291 | if (ACPI_FAILURE(status)) { | |
1292 | continue; | |
1293 | } | |
1294 | /* | |
1295 | * If there is a device corresponding to chandle then | |
1296 | * parse it (depth-first). | |
1297 | */ | |
1298 | if (acpi_bus_get_device(chandle, &child) == 0) { | |
1299 | level++; | |
1300 | phandle = chandle; | |
1301 | chandle = NULL; | |
1302 | parent = child; | |
1303 | } | |
1304 | continue; | |
1305 | } | |
1306 | return err; | |
1307 | } | |
ceaba663 KA |
1308 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
1309 | ||
1da177e4 | 1310 | |
4be44fcd | 1311 | static int acpi_bus_scan_fixed(struct acpi_device *root) |
1da177e4 | 1312 | { |
4be44fcd LB |
1313 | int result = 0; |
1314 | struct acpi_device *device = NULL; | |
1da177e4 LT |
1315 | |
1316 | ACPI_FUNCTION_TRACE("acpi_bus_scan_fixed"); | |
1317 | ||
1318 | if (!root) | |
1319 | return_VALUE(-ENODEV); | |
1320 | ||
1321 | /* | |
1322 | * Enumerate all fixed-feature devices. | |
1323 | */ | |
3fb02738 RS |
1324 | if (acpi_fadt.pwr_button == 0) { |
1325 | result = acpi_add_single_object(&device, acpi_root, | |
4be44fcd LB |
1326 | NULL, |
1327 | ACPI_BUS_TYPE_POWER_BUTTON); | |
3fb02738 RS |
1328 | if (!result) |
1329 | result = acpi_start_single_object(device); | |
1330 | } | |
1da177e4 | 1331 | |
3fb02738 RS |
1332 | if (acpi_fadt.sleep_button == 0) { |
1333 | result = acpi_add_single_object(&device, acpi_root, | |
4be44fcd LB |
1334 | NULL, |
1335 | ACPI_BUS_TYPE_SLEEP_BUTTON); | |
3fb02738 RS |
1336 | if (!result) |
1337 | result = acpi_start_single_object(device); | |
1338 | } | |
1da177e4 LT |
1339 | |
1340 | return_VALUE(result); | |
1341 | } | |
1342 | ||
5b327265 | 1343 | |
531881d6 | 1344 | static inline struct acpi_device * to_acpi_dev(struct device * dev) |
5b327265 PM |
1345 | { |
1346 | return container_of(dev, struct acpi_device, dev); | |
1347 | } | |
1348 | ||
1349 | ||
531881d6 | 1350 | static int root_suspend(struct acpi_device * acpi_dev, pm_message_t state) |
5b327265 PM |
1351 | { |
1352 | struct acpi_device * dev, * next; | |
1353 | int result; | |
1354 | ||
1355 | spin_lock(&acpi_device_lock); | |
1356 | list_for_each_entry_safe_reverse(dev, next, &acpi_device_list, g_list) { | |
1357 | if (dev->driver && dev->driver->ops.suspend) { | |
1358 | spin_unlock(&acpi_device_lock); | |
5b327265 PM |
1359 | result = dev->driver->ops.suspend(dev, 0); |
1360 | if (result) { | |
1361 | printk(KERN_ERR PREFIX "[%s - %s] Suspend failed: %d\n", | |
1362 | acpi_device_name(dev), | |
1363 | acpi_device_bid(dev), result); | |
1364 | } | |
1365 | spin_lock(&acpi_device_lock); | |
1366 | } | |
1367 | } | |
1368 | spin_unlock(&acpi_device_lock); | |
1369 | return 0; | |
1370 | } | |
1371 | ||
1372 | ||
1373 | static int acpi_device_suspend(struct device * dev, pm_message_t state) | |
1374 | { | |
1375 | struct acpi_device * acpi_dev = to_acpi_dev(dev); | |
1376 | ||
1377 | /* | |
1378 | * For now, we should only register 1 generic device - | |
1379 | * the ACPI root device - and from there, we walk the | |
1380 | * tree of ACPI devices to suspend each one using the | |
1381 | * ACPI driver methods. | |
1382 | */ | |
1383 | if (acpi_dev->handle == ACPI_ROOT_OBJECT) | |
531881d6 | 1384 | root_suspend(acpi_dev, state); |
5b327265 PM |
1385 | return 0; |
1386 | } | |
1387 | ||
1388 | ||
1389 | ||
1390 | static int root_resume(struct acpi_device * acpi_dev) | |
1391 | { | |
1392 | struct acpi_device * dev, * next; | |
1393 | int result; | |
1394 | ||
1395 | spin_lock(&acpi_device_lock); | |
1396 | list_for_each_entry_safe(dev, next, &acpi_device_list, g_list) { | |
1397 | if (dev->driver && dev->driver->ops.resume) { | |
1398 | spin_unlock(&acpi_device_lock); | |
5b327265 PM |
1399 | result = dev->driver->ops.resume(dev, 0); |
1400 | if (result) { | |
1401 | printk(KERN_ERR PREFIX "[%s - %s] resume failed: %d\n", | |
1402 | acpi_device_name(dev), | |
1403 | acpi_device_bid(dev), result); | |
1404 | } | |
1405 | spin_lock(&acpi_device_lock); | |
1406 | } | |
1407 | } | |
1408 | spin_unlock(&acpi_device_lock); | |
1409 | return 0; | |
1410 | } | |
1411 | ||
1412 | ||
1413 | static int acpi_device_resume(struct device * dev) | |
1414 | { | |
1415 | struct acpi_device * acpi_dev = to_acpi_dev(dev); | |
1416 | ||
1417 | /* | |
1418 | * For now, we should only register 1 generic device - | |
1419 | * the ACPI root device - and from there, we walk the | |
1420 | * tree of ACPI devices to resume each one using the | |
1421 | * ACPI driver methods. | |
1422 | */ | |
1423 | if (acpi_dev->handle == ACPI_ROOT_OBJECT) | |
1424 | root_resume(acpi_dev); | |
1425 | return 0; | |
1426 | } | |
1427 | ||
1428 | ||
1429 | struct bus_type acpi_bus_type = { | |
1430 | .name = "acpi", | |
1431 | .suspend = acpi_device_suspend, | |
1432 | .resume = acpi_device_resume, | |
1433 | }; | |
1434 | ||
1435 | ||
1436 | ||
1da177e4 LT |
1437 | static int __init acpi_scan_init(void) |
1438 | { | |
1439 | int result; | |
3fb02738 | 1440 | struct acpi_bus_ops ops; |
1da177e4 LT |
1441 | |
1442 | ACPI_FUNCTION_TRACE("acpi_scan_init"); | |
1443 | ||
1444 | if (acpi_disabled) | |
1445 | return_VALUE(0); | |
1446 | ||
1447 | kset_register(&acpi_namespace_kset); | |
1448 | ||
5b327265 PM |
1449 | result = bus_register(&acpi_bus_type); |
1450 | if (result) { | |
1451 | /* We don't want to quit even if we failed to add suspend/resume */ | |
1452 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
1453 | } | |
1454 | ||
1da177e4 LT |
1455 | /* |
1456 | * Create the root device in the bus's device tree | |
1457 | */ | |
3fb02738 | 1458 | result = acpi_add_single_object(&acpi_root, NULL, ACPI_ROOT_OBJECT, |
4be44fcd | 1459 | ACPI_BUS_TYPE_SYSTEM); |
1da177e4 LT |
1460 | if (result) |
1461 | goto Done; | |
1462 | ||
3fb02738 | 1463 | result = acpi_start_single_object(acpi_root); |
5b327265 PM |
1464 | if (result) |
1465 | goto Done; | |
1466 | ||
1467 | acpi_root->dev.bus = &acpi_bus_type; | |
1468 | snprintf(acpi_root->dev.bus_id, BUS_ID_SIZE, "%s", acpi_bus_type.name); | |
1469 | result = device_register(&acpi_root->dev); | |
1470 | if (result) { | |
1471 | /* We don't want to quit even if we failed to add suspend/resume */ | |
1472 | printk(KERN_ERR PREFIX "Could not register device\n"); | |
1473 | } | |
3fb02738 | 1474 | |
1da177e4 LT |
1475 | /* |
1476 | * Enumerate devices in the ACPI namespace. | |
1477 | */ | |
1478 | result = acpi_bus_scan_fixed(acpi_root); | |
3fb02738 RS |
1479 | if (!result) { |
1480 | memset(&ops, 0, sizeof(ops)); | |
1481 | ops.acpi_op_add = 1; | |
1482 | ops.acpi_op_start = 1; | |
1483 | result = acpi_bus_scan(acpi_root, &ops); | |
1484 | } | |
1da177e4 LT |
1485 | |
1486 | if (result) | |
1487 | acpi_device_unregister(acpi_root, ACPI_BUS_REMOVAL_NORMAL); | |
1488 | ||
4be44fcd | 1489 | Done: |
1da177e4 LT |
1490 | return_VALUE(result); |
1491 | } | |
1492 | ||
1493 | subsys_initcall(acpi_scan_init); |