Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * scan.c - support for transforming the ACPI namespace into individual objects | |
3 | */ | |
4 | ||
5 | #include <linux/module.h> | |
6 | #include <linux/init.h> | |
9b6d97b6 | 7 | #include <linux/kernel.h> |
1da177e4 LT |
8 | #include <linux/acpi.h> |
9 | ||
10 | #include <acpi/acpi_drivers.h> | |
11 | #include <acpi/acinterp.h> /* for acpi_ex_eisa_id_to_string() */ | |
12 | ||
1da177e4 | 13 | #define _COMPONENT ACPI_BUS_COMPONENT |
4be44fcd | 14 | ACPI_MODULE_NAME("scan") |
1da177e4 | 15 | #define STRUCT_TO_INT(s) (*((int*)&s)) |
4be44fcd | 16 | extern struct acpi_device *acpi_root; |
1da177e4 LT |
17 | |
18 | #define ACPI_BUS_CLASS "system_bus" | |
19 | #define ACPI_BUS_HID "ACPI_BUS" | |
20 | #define ACPI_BUS_DRIVER_NAME "ACPI Bus Driver" | |
21 | #define ACPI_BUS_DEVICE_NAME "System Bus" | |
22 | ||
23 | static LIST_HEAD(acpi_device_list); | |
24 | DEFINE_SPINLOCK(acpi_device_lock); | |
25 | LIST_HEAD(acpi_wakeup_device_list); | |
26 | ||
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); |
6044ec88 | 31 | kfree(dev->pnp.cid_list); |
1da177e4 LT |
32 | kfree(dev); |
33 | } | |
34 | ||
35 | struct acpi_device_attribute { | |
36 | struct attribute attr; | |
4be44fcd LB |
37 | ssize_t(*show) (struct acpi_device *, char *); |
38 | ssize_t(*store) (struct acpi_device *, const char *, size_t); | |
1da177e4 LT |
39 | }; |
40 | ||
41 | typedef void acpi_device_sysfs_files(struct kobject *, | |
4be44fcd | 42 | const struct attribute *); |
1da177e4 LT |
43 | |
44 | static void setup_sys_fs_device_files(struct acpi_device *dev, | |
4be44fcd | 45 | acpi_device_sysfs_files * func); |
1da177e4 LT |
46 | |
47 | #define create_sysfs_device_files(dev) \ | |
48 | setup_sys_fs_device_files(dev, (acpi_device_sysfs_files *)&sysfs_create_file) | |
49 | #define remove_sysfs_device_files(dev) \ | |
50 | setup_sys_fs_device_files(dev, (acpi_device_sysfs_files *)&sysfs_remove_file) | |
51 | ||
1da177e4 LT |
52 | #define to_acpi_device(n) container_of(n, struct acpi_device, kobj) |
53 | #define to_handle_attr(n) container_of(n, struct acpi_device_attribute, attr); | |
54 | ||
55 | static ssize_t acpi_device_attr_show(struct kobject *kobj, | |
4be44fcd | 56 | struct attribute *attr, char *buf) |
1da177e4 LT |
57 | { |
58 | struct acpi_device *device = to_acpi_device(kobj); | |
59 | struct acpi_device_attribute *attribute = to_handle_attr(attr); | |
70f2817a | 60 | return attribute->show ? attribute->show(device, buf) : -EIO; |
1da177e4 LT |
61 | } |
62 | static ssize_t acpi_device_attr_store(struct kobject *kobj, | |
4be44fcd LB |
63 | struct attribute *attr, const char *buf, |
64 | size_t len) | |
1da177e4 LT |
65 | { |
66 | struct acpi_device *device = to_acpi_device(kobj); | |
67 | struct acpi_device_attribute *attribute = to_handle_attr(attr); | |
70f2817a | 68 | return attribute->store ? attribute->store(device, buf, len) : -EIO; |
1da177e4 LT |
69 | } |
70 | ||
71 | static struct sysfs_ops acpi_device_sysfs_ops = { | |
4be44fcd LB |
72 | .show = acpi_device_attr_show, |
73 | .store = acpi_device_attr_store, | |
1da177e4 LT |
74 | }; |
75 | ||
76 | static struct kobj_type ktype_acpi_ns = { | |
4be44fcd LB |
77 | .sysfs_ops = &acpi_device_sysfs_ops, |
78 | .release = acpi_device_release, | |
1da177e4 LT |
79 | }; |
80 | ||
312c004d | 81 | static int namespace_uevent(struct kset *kset, struct kobject *kobj, |
1da177e4 LT |
82 | char **envp, int num_envp, char *buffer, |
83 | int buffer_size) | |
84 | { | |
85 | struct acpi_device *dev = to_acpi_device(kobj); | |
86 | int i = 0; | |
87 | int len = 0; | |
88 | ||
89 | if (!dev->driver) | |
90 | return 0; | |
91 | ||
312c004d KS |
92 | if (add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &len, |
93 | "PHYSDEVDRIVER=%s", dev->driver->name)) | |
1da177e4 LT |
94 | return -ENOMEM; |
95 | ||
96 | envp[i] = NULL; | |
97 | ||
98 | return 0; | |
99 | } | |
100 | ||
312c004d KS |
101 | static struct kset_uevent_ops namespace_uevent_ops = { |
102 | .uevent = &namespace_uevent, | |
1da177e4 LT |
103 | }; |
104 | ||
105 | static struct kset acpi_namespace_kset = { | |
4be44fcd LB |
106 | .kobj = { |
107 | .name = "namespace", | |
108 | }, | |
1da177e4 | 109 | .subsys = &acpi_subsys, |
4be44fcd | 110 | .ktype = &ktype_acpi_ns, |
312c004d | 111 | .uevent_ops = &namespace_uevent_ops, |
1da177e4 LT |
112 | }; |
113 | ||
4be44fcd LB |
114 | static void acpi_device_register(struct acpi_device *device, |
115 | struct acpi_device *parent) | |
1da177e4 | 116 | { |
9b6d97b6 RD |
117 | int err; |
118 | ||
1da177e4 LT |
119 | /* |
120 | * Linkage | |
121 | * ------- | |
122 | * Link this device to its parent and siblings. | |
123 | */ | |
124 | INIT_LIST_HEAD(&device->children); | |
125 | INIT_LIST_HEAD(&device->node); | |
126 | INIT_LIST_HEAD(&device->g_list); | |
127 | INIT_LIST_HEAD(&device->wakeup_list); | |
128 | ||
129 | spin_lock(&acpi_device_lock); | |
130 | if (device->parent) { | |
131 | list_add_tail(&device->node, &device->parent->children); | |
4be44fcd | 132 | list_add_tail(&device->g_list, &device->parent->g_list); |
1da177e4 | 133 | } else |
4be44fcd | 134 | list_add_tail(&device->g_list, &acpi_device_list); |
1da177e4 | 135 | if (device->wakeup.flags.valid) |
4be44fcd | 136 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); |
1da177e4 LT |
137 | spin_unlock(&acpi_device_lock); |
138 | ||
4be44fcd | 139 | strlcpy(device->kobj.name, device->pnp.bus_id, KOBJ_NAME_LEN); |
1da177e4 LT |
140 | if (parent) |
141 | device->kobj.parent = &parent->kobj; | |
142 | device->kobj.ktype = &ktype_acpi_ns; | |
143 | device->kobj.kset = &acpi_namespace_kset; | |
9b6d97b6 RD |
144 | err = kobject_register(&device->kobj); |
145 | if (err < 0) | |
146 | printk(KERN_WARNING "%s: kobject_register error: %d\n", | |
147 | __FUNCTION__, err); | |
1da177e4 LT |
148 | create_sysfs_device_files(device); |
149 | } | |
150 | ||
06ea8e08 | 151 | static void acpi_device_unregister(struct acpi_device *device, int type) |
1da177e4 LT |
152 | { |
153 | spin_lock(&acpi_device_lock); | |
154 | if (device->parent) { | |
155 | list_del(&device->node); | |
156 | list_del(&device->g_list); | |
157 | } else | |
158 | list_del(&device->g_list); | |
159 | ||
160 | list_del(&device->wakeup_list); | |
161 | ||
162 | spin_unlock(&acpi_device_lock); | |
163 | ||
164 | acpi_detach_data(device->handle, acpi_bus_data_handler); | |
165 | remove_sysfs_device_files(device); | |
166 | kobject_unregister(&device->kobj); | |
1da177e4 LT |
167 | } |
168 | ||
4be44fcd | 169 | void acpi_bus_data_handler(acpi_handle handle, u32 function, void *context) |
1da177e4 | 170 | { |
1da177e4 LT |
171 | |
172 | /* TBD */ | |
173 | ||
d550d98d | 174 | return; |
1da177e4 LT |
175 | } |
176 | ||
4be44fcd | 177 | static int acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 178 | { |
4be44fcd LB |
179 | acpi_status status = 0; |
180 | acpi_handle handle = NULL; | |
181 | u32 i = 0; | |
1da177e4 | 182 | |
1da177e4 LT |
183 | |
184 | /* | |
185 | * Power Management Flags | |
186 | */ | |
187 | status = acpi_get_handle(device->handle, "_PSC", &handle); | |
188 | if (ACPI_SUCCESS(status)) | |
189 | device->power.flags.explicit_get = 1; | |
190 | status = acpi_get_handle(device->handle, "_IRC", &handle); | |
191 | if (ACPI_SUCCESS(status)) | |
192 | device->power.flags.inrush_current = 1; | |
193 | ||
194 | /* | |
195 | * Enumerate supported power management states | |
196 | */ | |
197 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3; i++) { | |
198 | struct acpi_device_power_state *ps = &device->power.states[i]; | |
4be44fcd | 199 | char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' }; |
1da177e4 LT |
200 | |
201 | /* Evaluate "_PRx" to se if power resources are referenced */ | |
202 | acpi_evaluate_reference(device->handle, object_name, NULL, | |
4be44fcd | 203 | &ps->resources); |
1da177e4 LT |
204 | if (ps->resources.count) { |
205 | device->power.flags.power_resources = 1; | |
206 | ps->flags.valid = 1; | |
207 | } | |
208 | ||
209 | /* Evaluate "_PSx" to see if we can do explicit sets */ | |
210 | object_name[2] = 'S'; | |
211 | status = acpi_get_handle(device->handle, object_name, &handle); | |
212 | if (ACPI_SUCCESS(status)) { | |
213 | ps->flags.explicit_set = 1; | |
214 | ps->flags.valid = 1; | |
215 | } | |
216 | ||
217 | /* State is valid if we have some power control */ | |
218 | if (ps->resources.count || ps->flags.explicit_set) | |
219 | ps->flags.valid = 1; | |
220 | ||
4be44fcd | 221 | ps->power = -1; /* Unknown - driver assigned */ |
1da177e4 LT |
222 | ps->latency = -1; /* Unknown - driver assigned */ |
223 | } | |
224 | ||
225 | /* Set defaults for D0 and D3 states (always valid) */ | |
226 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
227 | device->power.states[ACPI_STATE_D0].power = 100; | |
228 | device->power.states[ACPI_STATE_D3].flags.valid = 1; | |
229 | device->power.states[ACPI_STATE_D3].power = 0; | |
230 | ||
231 | /* TBD: System wake support and resource requirements. */ | |
232 | ||
233 | device->power.state = ACPI_STATE_UNKNOWN; | |
234 | ||
d550d98d | 235 | return 0; |
1da177e4 LT |
236 | } |
237 | ||
4be44fcd | 238 | int acpi_match_ids(struct acpi_device *device, char *ids) |
1da177e4 | 239 | { |
1da177e4 LT |
240 | if (device->flags.hardware_id) |
241 | if (strstr(ids, device->pnp.hardware_id)) | |
1a365616 | 242 | return 0; |
1da177e4 LT |
243 | |
244 | if (device->flags.compatible_ids) { | |
245 | struct acpi_compatible_id_list *cid_list = device->pnp.cid_list; | |
246 | int i; | |
247 | ||
248 | /* compare multiple _CID entries against driver ids */ | |
4be44fcd | 249 | for (i = 0; i < cid_list->count; i++) { |
1da177e4 | 250 | if (strstr(ids, cid_list->id[i].value)) |
1a365616 | 251 | return 0; |
1da177e4 LT |
252 | } |
253 | } | |
1a365616 | 254 | return -ENOENT; |
1da177e4 LT |
255 | } |
256 | ||
257 | static acpi_status | |
4be44fcd LB |
258 | acpi_bus_extract_wakeup_device_power_package(struct acpi_device *device, |
259 | union acpi_object *package) | |
1da177e4 | 260 | { |
4be44fcd LB |
261 | int i = 0; |
262 | union acpi_object *element = NULL; | |
1da177e4 LT |
263 | |
264 | if (!device || !package || (package->package.count < 2)) | |
265 | return AE_BAD_PARAMETER; | |
266 | ||
267 | element = &(package->package.elements[0]); | |
268 | if (!element) | |
269 | return AE_BAD_PARAMETER; | |
270 | if (element->type == ACPI_TYPE_PACKAGE) { | |
271 | if ((element->package.count < 2) || | |
4be44fcd LB |
272 | (element->package.elements[0].type != |
273 | ACPI_TYPE_LOCAL_REFERENCE) | |
274 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) | |
1da177e4 | 275 | return AE_BAD_DATA; |
4be44fcd LB |
276 | device->wakeup.gpe_device = |
277 | element->package.elements[0].reference.handle; | |
278 | device->wakeup.gpe_number = | |
279 | (u32) element->package.elements[1].integer.value; | |
280 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
1da177e4 | 281 | device->wakeup.gpe_number = element->integer.value; |
4be44fcd | 282 | } else |
1da177e4 LT |
283 | return AE_BAD_DATA; |
284 | ||
285 | element = &(package->package.elements[1]); | |
286 | if (element->type != ACPI_TYPE_INTEGER) { | |
287 | return AE_BAD_DATA; | |
288 | } | |
289 | device->wakeup.sleep_state = element->integer.value; | |
290 | ||
291 | if ((package->package.count - 2) > ACPI_MAX_HANDLES) { | |
292 | return AE_NO_MEMORY; | |
293 | } | |
294 | device->wakeup.resources.count = package->package.count - 2; | |
4be44fcd | 295 | for (i = 0; i < device->wakeup.resources.count; i++) { |
1da177e4 | 296 | element = &(package->package.elements[i + 2]); |
4be44fcd | 297 | if (element->type != ACPI_TYPE_ANY) { |
1da177e4 LT |
298 | return AE_BAD_DATA; |
299 | } | |
300 | ||
301 | device->wakeup.resources.handles[i] = element->reference.handle; | |
302 | } | |
303 | ||
304 | return AE_OK; | |
305 | } | |
306 | ||
4be44fcd | 307 | static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
1da177e4 | 308 | { |
4be44fcd LB |
309 | acpi_status status = 0; |
310 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
311 | union acpi_object *package = NULL; | |
1da177e4 | 312 | |
1da177e4 LT |
313 | |
314 | /* _PRW */ | |
315 | status = acpi_evaluate_object(device->handle, "_PRW", NULL, &buffer); | |
316 | if (ACPI_FAILURE(status)) { | |
a6fc6720 | 317 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); |
1da177e4 LT |
318 | goto end; |
319 | } | |
320 | ||
4be44fcd | 321 | package = (union acpi_object *)buffer.pointer; |
1da177e4 LT |
322 | status = acpi_bus_extract_wakeup_device_power_package(device, package); |
323 | if (ACPI_FAILURE(status)) { | |
a6fc6720 | 324 | ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package")); |
1da177e4 LT |
325 | goto end; |
326 | } | |
327 | ||
02438d87 | 328 | kfree(buffer.pointer); |
1da177e4 LT |
329 | |
330 | device->wakeup.flags.valid = 1; | |
4be44fcd | 331 | /* Power button, Lid switch always enable wakeup */ |
1da177e4 LT |
332 | if (!acpi_match_ids(device, "PNP0C0D,PNP0C0C,PNP0C0E")) |
333 | device->wakeup.flags.run_wake = 1; | |
334 | ||
4be44fcd | 335 | end: |
1da177e4 LT |
336 | if (ACPI_FAILURE(status)) |
337 | device->flags.wake_capable = 0; | |
d550d98d | 338 | return 0; |
1da177e4 LT |
339 | } |
340 | ||
341 | /* -------------------------------------------------------------------------- | |
312c004d | 342 | ACPI sysfs device file support |
1da177e4 | 343 | -------------------------------------------------------------------------- */ |
4be44fcd LB |
344 | static ssize_t acpi_eject_store(struct acpi_device *device, |
345 | const char *buf, size_t count); | |
1da177e4 LT |
346 | |
347 | #define ACPI_DEVICE_ATTR(_name,_mode,_show,_store) \ | |
348 | static struct acpi_device_attribute acpi_device_attr_##_name = \ | |
349 | __ATTR(_name, _mode, _show, _store) | |
350 | ||
351 | ACPI_DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); | |
352 | ||
353 | /** | |
354 | * setup_sys_fs_device_files - sets up the device files under device namespace | |
67be2dd1 MW |
355 | * @dev: acpi_device object |
356 | * @func: function pointer to create or destroy the device file | |
1da177e4 LT |
357 | */ |
358 | static void | |
4be44fcd LB |
359 | setup_sys_fs_device_files(struct acpi_device *dev, |
360 | acpi_device_sysfs_files * func) | |
1da177e4 | 361 | { |
4be44fcd LB |
362 | acpi_status status; |
363 | acpi_handle temp = NULL; | |
1da177e4 LT |
364 | |
365 | /* | |
366 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
367 | * hot-removal function from userland. | |
368 | */ | |
369 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); | |
370 | if (ACPI_SUCCESS(status)) | |
4be44fcd | 371 | (*(func)) (&dev->kobj, &acpi_device_attr_eject.attr); |
1da177e4 LT |
372 | } |
373 | ||
4be44fcd | 374 | static int acpi_eject_operation(acpi_handle handle, int lockable) |
1da177e4 LT |
375 | { |
376 | struct acpi_object_list arg_list; | |
377 | union acpi_object arg; | |
378 | acpi_status status = AE_OK; | |
379 | ||
380 | /* | |
381 | * TBD: evaluate _PS3? | |
382 | */ | |
383 | ||
384 | if (lockable) { | |
385 | arg_list.count = 1; | |
386 | arg_list.pointer = &arg; | |
387 | arg.type = ACPI_TYPE_INTEGER; | |
388 | arg.integer.value = 0; | |
389 | acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); | |
390 | } | |
391 | ||
392 | arg_list.count = 1; | |
393 | arg_list.pointer = &arg; | |
394 | arg.type = ACPI_TYPE_INTEGER; | |
395 | arg.integer.value = 1; | |
396 | ||
397 | /* | |
398 | * TBD: _EJD support. | |
399 | */ | |
400 | ||
401 | status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); | |
402 | if (ACPI_FAILURE(status)) { | |
4be44fcd | 403 | return (-ENODEV); |
1da177e4 LT |
404 | } |
405 | ||
4be44fcd | 406 | return (0); |
1da177e4 LT |
407 | } |
408 | ||
1da177e4 LT |
409 | static ssize_t |
410 | acpi_eject_store(struct acpi_device *device, const char *buf, size_t count) | |
411 | { | |
4be44fcd LB |
412 | int result; |
413 | int ret = count; | |
414 | int islockable; | |
415 | acpi_status status; | |
416 | acpi_handle handle; | |
417 | acpi_object_type type = 0; | |
1da177e4 LT |
418 | |
419 | if ((!count) || (buf[0] != '1')) { | |
420 | return -EINVAL; | |
421 | } | |
1da177e4 LT |
422 | #ifndef FORCE_EJECT |
423 | if (device->driver == NULL) { | |
424 | ret = -ENODEV; | |
425 | goto err; | |
426 | } | |
427 | #endif | |
428 | status = acpi_get_type(device->handle, &type); | |
4be44fcd | 429 | if (ACPI_FAILURE(status) || (!device->flags.ejectable)) { |
1da177e4 LT |
430 | ret = -ENODEV; |
431 | goto err; | |
432 | } | |
433 | ||
434 | islockable = device->flags.lockable; | |
435 | handle = device->handle; | |
436 | ||
eefa27a9 | 437 | result = acpi_bus_trim(device, 1); |
1da177e4 LT |
438 | |
439 | if (!result) | |
440 | result = acpi_eject_operation(handle, islockable); | |
441 | ||
442 | if (result) { | |
443 | ret = -EBUSY; | |
444 | } | |
4be44fcd | 445 | err: |
1da177e4 LT |
446 | return ret; |
447 | } | |
448 | ||
1da177e4 LT |
449 | /* -------------------------------------------------------------------------- |
450 | Performance Management | |
451 | -------------------------------------------------------------------------- */ | |
452 | ||
4be44fcd | 453 | static int acpi_bus_get_perf_flags(struct acpi_device *device) |
1da177e4 LT |
454 | { |
455 | device->performance.state = ACPI_STATE_UNKNOWN; | |
456 | return 0; | |
457 | } | |
458 | ||
459 | /* -------------------------------------------------------------------------- | |
460 | Driver Management | |
461 | -------------------------------------------------------------------------- */ | |
462 | ||
463 | static LIST_HEAD(acpi_bus_drivers); | |
1da177e4 | 464 | |
1da177e4 | 465 | /** |
d758a8fa RD |
466 | * acpi_bus_match - match device IDs to driver's supported IDs |
467 | * @device: the device that we are trying to match to a driver | |
468 | * @driver: driver whose device id table is being checked | |
469 | * | |
1da177e4 LT |
470 | * Checks the device's hardware (_HID) or compatible (_CID) ids to see if it |
471 | * matches the specified driver's criteria. | |
472 | */ | |
473 | static int | |
4be44fcd | 474 | acpi_bus_match(struct acpi_device *device, struct acpi_driver *driver) |
1da177e4 LT |
475 | { |
476 | if (driver && driver->ops.match) | |
477 | return driver->ops.match(device, driver); | |
478 | return acpi_match_ids(device, driver->ids); | |
479 | } | |
480 | ||
1da177e4 | 481 | /** |
d758a8fa RD |
482 | * acpi_bus_driver_init - add a device to a driver |
483 | * @device: the device to add and initialize | |
484 | * @driver: driver for the device | |
485 | * | |
1da177e4 LT |
486 | * Used to initialize a device via its device driver. Called whenever a |
487 | * driver is bound to a device. Invokes the driver's add() and start() ops. | |
488 | */ | |
489 | static int | |
4be44fcd | 490 | acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) |
1da177e4 | 491 | { |
4be44fcd | 492 | int result = 0; |
1da177e4 | 493 | |
1da177e4 LT |
494 | |
495 | if (!device || !driver) | |
d550d98d | 496 | return -EINVAL; |
1da177e4 LT |
497 | |
498 | if (!driver->ops.add) | |
d550d98d | 499 | return -ENOSYS; |
1da177e4 LT |
500 | |
501 | result = driver->ops.add(device); | |
502 | if (result) { | |
503 | device->driver = NULL; | |
504 | acpi_driver_data(device) = NULL; | |
d550d98d | 505 | return result; |
1da177e4 LT |
506 | } |
507 | ||
508 | device->driver = driver; | |
509 | ||
510 | /* | |
511 | * TBD - Configuration Management: Assign resources to device based | |
512 | * upon possible configuration and currently allocated resources. | |
513 | */ | |
514 | ||
4be44fcd LB |
515 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
516 | "Driver successfully bound to device\n")); | |
d550d98d | 517 | return 0; |
3fb02738 RS |
518 | } |
519 | ||
8713cbef | 520 | static int acpi_start_single_object(struct acpi_device *device) |
3fb02738 RS |
521 | { |
522 | int result = 0; | |
523 | struct acpi_driver *driver; | |
524 | ||
3fb02738 RS |
525 | |
526 | if (!(driver = device->driver)) | |
d550d98d | 527 | return 0; |
3fb02738 | 528 | |
1da177e4 LT |
529 | if (driver->ops.start) { |
530 | result = driver->ops.start(device); | |
531 | if (result && driver->ops.remove) | |
532 | driver->ops.remove(device, ACPI_BUS_REMOVAL_NORMAL); | |
1da177e4 LT |
533 | } |
534 | ||
d550d98d | 535 | return result; |
1da177e4 LT |
536 | } |
537 | ||
9d9f749b | 538 | static void acpi_driver_attach(struct acpi_driver *drv) |
1da177e4 | 539 | { |
4be44fcd | 540 | struct list_head *node, *next; |
1da177e4 | 541 | |
1da177e4 LT |
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 | 569 | |
1da177e4 LT |
570 | |
571 | spin_lock(&acpi_device_lock); | |
4be44fcd LB |
572 | list_for_each_safe(node, next, &acpi_device_list) { |
573 | struct acpi_device *dev = | |
574 | container_of(node, struct acpi_device, g_list); | |
1da177e4 LT |
575 | |
576 | if (dev->driver == drv) { | |
577 | spin_unlock(&acpi_device_lock); | |
578 | if (drv->ops.remove) | |
4be44fcd | 579 | drv->ops.remove(dev, ACPI_BUS_REMOVAL_NORMAL); |
1da177e4 LT |
580 | spin_lock(&acpi_device_lock); |
581 | dev->driver = NULL; | |
582 | dev->driver_data = NULL; | |
583 | atomic_dec(&drv->references); | |
584 | } | |
585 | } | |
586 | spin_unlock(&acpi_device_lock); | |
1da177e4 LT |
587 | } |
588 | ||
589 | /** | |
d758a8fa RD |
590 | * acpi_bus_register_driver - register a driver with the ACPI bus |
591 | * @driver: driver being registered | |
592 | * | |
1da177e4 | 593 | * Registers a driver with the ACPI bus. Searches the namespace for all |
9d9f749b BH |
594 | * devices that match the driver's criteria and binds. Returns zero for |
595 | * success or a negative error status for failure. | |
1da177e4 | 596 | */ |
4be44fcd | 597 | int acpi_bus_register_driver(struct acpi_driver *driver) |
1da177e4 | 598 | { |
1da177e4 LT |
599 | |
600 | if (acpi_disabled) | |
d550d98d | 601 | return -ENODEV; |
1da177e4 | 602 | |
1da177e4 LT |
603 | spin_lock(&acpi_device_lock); |
604 | list_add_tail(&driver->node, &acpi_bus_drivers); | |
605 | spin_unlock(&acpi_device_lock); | |
9d9f749b | 606 | acpi_driver_attach(driver); |
1da177e4 | 607 | |
d550d98d | 608 | return 0; |
1da177e4 | 609 | } |
1da177e4 | 610 | |
4be44fcd | 611 | EXPORT_SYMBOL(acpi_bus_register_driver); |
1da177e4 LT |
612 | |
613 | /** | |
d758a8fa RD |
614 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus |
615 | * @driver: driver to unregister | |
616 | * | |
1da177e4 LT |
617 | * Unregisters a driver with the ACPI bus. Searches the namespace for all |
618 | * devices that match the driver's criteria and unbinds. | |
619 | */ | |
06ea8e08 | 620 | void acpi_bus_unregister_driver(struct acpi_driver *driver) |
1da177e4 | 621 | { |
1a365616 BH |
622 | acpi_driver_detach(driver); |
623 | ||
624 | if (!atomic_read(&driver->references)) { | |
625 | spin_lock(&acpi_device_lock); | |
626 | list_del_init(&driver->node); | |
627 | spin_unlock(&acpi_device_lock); | |
628 | } | |
06ea8e08 | 629 | return; |
1da177e4 | 630 | } |
4be44fcd | 631 | |
1da177e4 LT |
632 | EXPORT_SYMBOL(acpi_bus_unregister_driver); |
633 | ||
634 | /** | |
d758a8fa RD |
635 | * acpi_bus_find_driver - check if there is a driver installed for the device |
636 | * @device: device that we are trying to find a supporting driver for | |
637 | * | |
1da177e4 LT |
638 | * Parses the list of registered drivers looking for a driver applicable for |
639 | * the specified device. | |
640 | */ | |
4be44fcd | 641 | static int acpi_bus_find_driver(struct acpi_device *device) |
1da177e4 | 642 | { |
4be44fcd LB |
643 | int result = 0; |
644 | struct list_head *node, *next; | |
1da177e4 | 645 | |
1da177e4 LT |
646 | |
647 | spin_lock(&acpi_device_lock); | |
4be44fcd LB |
648 | list_for_each_safe(node, next, &acpi_bus_drivers) { |
649 | struct acpi_driver *driver = | |
650 | container_of(node, struct acpi_driver, node); | |
1da177e4 LT |
651 | |
652 | atomic_inc(&driver->references); | |
653 | spin_unlock(&acpi_device_lock); | |
654 | if (!acpi_bus_match(device, driver)) { | |
655 | result = acpi_bus_driver_init(device, driver); | |
656 | if (!result) | |
657 | goto Done; | |
658 | } | |
659 | atomic_dec(&driver->references); | |
660 | spin_lock(&acpi_device_lock); | |
661 | } | |
662 | spin_unlock(&acpi_device_lock); | |
663 | ||
4be44fcd | 664 | Done: |
d550d98d | 665 | return result; |
1da177e4 LT |
666 | } |
667 | ||
1da177e4 LT |
668 | /* -------------------------------------------------------------------------- |
669 | Device Enumeration | |
670 | -------------------------------------------------------------------------- */ | |
671 | ||
c8f7a62c LB |
672 | acpi_status |
673 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
674 | { | |
675 | acpi_status status; | |
676 | acpi_handle tmp; | |
677 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
678 | union acpi_object *obj; | |
679 | ||
680 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
681 | if (ACPI_FAILURE(status)) | |
682 | return status; | |
683 | ||
684 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
685 | if (ACPI_SUCCESS(status)) { | |
686 | obj = buffer.pointer; | |
687 | status = acpi_get_handle(NULL, obj->string.pointer, ejd); | |
688 | kfree(buffer.pointer); | |
689 | } | |
690 | return status; | |
691 | } | |
692 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
693 | ||
694 | ||
4be44fcd | 695 | static int acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 696 | { |
4be44fcd LB |
697 | acpi_status status = AE_OK; |
698 | acpi_handle temp = NULL; | |
1da177e4 | 699 | |
1da177e4 LT |
700 | |
701 | /* Presence of _STA indicates 'dynamic_status' */ | |
702 | status = acpi_get_handle(device->handle, "_STA", &temp); | |
703 | if (ACPI_SUCCESS(status)) | |
704 | device->flags.dynamic_status = 1; | |
705 | ||
706 | /* Presence of _CID indicates 'compatible_ids' */ | |
707 | status = acpi_get_handle(device->handle, "_CID", &temp); | |
708 | if (ACPI_SUCCESS(status)) | |
709 | device->flags.compatible_ids = 1; | |
710 | ||
711 | /* Presence of _RMV indicates 'removable' */ | |
712 | status = acpi_get_handle(device->handle, "_RMV", &temp); | |
713 | if (ACPI_SUCCESS(status)) | |
714 | device->flags.removable = 1; | |
715 | ||
716 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
717 | status = acpi_get_handle(device->handle, "_EJD", &temp); | |
718 | if (ACPI_SUCCESS(status)) | |
719 | device->flags.ejectable = 1; | |
720 | else { | |
721 | status = acpi_get_handle(device->handle, "_EJ0", &temp); | |
722 | if (ACPI_SUCCESS(status)) | |
723 | device->flags.ejectable = 1; | |
724 | } | |
725 | ||
726 | /* Presence of _LCK indicates 'lockable' */ | |
727 | status = acpi_get_handle(device->handle, "_LCK", &temp); | |
728 | if (ACPI_SUCCESS(status)) | |
729 | device->flags.lockable = 1; | |
730 | ||
731 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ | |
732 | status = acpi_get_handle(device->handle, "_PS0", &temp); | |
733 | if (ACPI_FAILURE(status)) | |
734 | status = acpi_get_handle(device->handle, "_PR0", &temp); | |
735 | if (ACPI_SUCCESS(status)) | |
736 | device->flags.power_manageable = 1; | |
737 | ||
738 | /* Presence of _PRW indicates wake capable */ | |
739 | status = acpi_get_handle(device->handle, "_PRW", &temp); | |
740 | if (ACPI_SUCCESS(status)) | |
741 | device->flags.wake_capable = 1; | |
742 | ||
743 | /* TBD: Peformance management */ | |
744 | ||
d550d98d | 745 | return 0; |
1da177e4 LT |
746 | } |
747 | ||
4be44fcd LB |
748 | static void acpi_device_get_busid(struct acpi_device *device, |
749 | acpi_handle handle, int type) | |
1da177e4 | 750 | { |
4be44fcd LB |
751 | char bus_id[5] = { '?', 0 }; |
752 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
753 | int i = 0; | |
1da177e4 LT |
754 | |
755 | /* | |
756 | * Bus ID | |
757 | * ------ | |
758 | * The device's Bus ID is simply the object name. | |
759 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
760 | */ | |
761 | switch (type) { | |
762 | case ACPI_BUS_TYPE_SYSTEM: | |
763 | strcpy(device->pnp.bus_id, "ACPI"); | |
764 | break; | |
765 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
766 | strcpy(device->pnp.bus_id, "PWRF"); | |
767 | break; | |
768 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
769 | strcpy(device->pnp.bus_id, "SLPF"); | |
770 | break; | |
771 | default: | |
772 | acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer); | |
773 | /* Clean up trailing underscores (if any) */ | |
774 | for (i = 3; i > 1; i--) { | |
775 | if (bus_id[i] == '_') | |
776 | bus_id[i] = '\0'; | |
777 | else | |
778 | break; | |
779 | } | |
780 | strcpy(device->pnp.bus_id, bus_id); | |
781 | break; | |
782 | } | |
783 | } | |
784 | ||
4be44fcd LB |
785 | static void acpi_device_set_id(struct acpi_device *device, |
786 | struct acpi_device *parent, acpi_handle handle, | |
787 | int type) | |
1da177e4 | 788 | { |
4be44fcd LB |
789 | struct acpi_device_info *info; |
790 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
791 | char *hid = NULL; | |
792 | char *uid = NULL; | |
1da177e4 | 793 | struct acpi_compatible_id_list *cid_list = NULL; |
4be44fcd | 794 | acpi_status status; |
1da177e4 LT |
795 | |
796 | switch (type) { | |
797 | case ACPI_BUS_TYPE_DEVICE: | |
798 | status = acpi_get_object_info(handle, &buffer); | |
799 | if (ACPI_FAILURE(status)) { | |
4be44fcd | 800 | printk("%s: Error reading device info\n", __FUNCTION__); |
1da177e4 LT |
801 | return; |
802 | } | |
803 | ||
804 | info = buffer.pointer; | |
805 | if (info->valid & ACPI_VALID_HID) | |
806 | hid = info->hardware_id.value; | |
807 | if (info->valid & ACPI_VALID_UID) | |
808 | uid = info->unique_id.value; | |
809 | if (info->valid & ACPI_VALID_CID) | |
810 | cid_list = &info->compatibility_id; | |
811 | if (info->valid & ACPI_VALID_ADR) { | |
812 | device->pnp.bus_address = info->address; | |
813 | device->flags.bus_address = 1; | |
814 | } | |
815 | break; | |
816 | case ACPI_BUS_TYPE_POWER: | |
817 | hid = ACPI_POWER_HID; | |
818 | break; | |
819 | case ACPI_BUS_TYPE_PROCESSOR: | |
820 | hid = ACPI_PROCESSOR_HID; | |
821 | break; | |
822 | case ACPI_BUS_TYPE_SYSTEM: | |
823 | hid = ACPI_SYSTEM_HID; | |
824 | break; | |
825 | case ACPI_BUS_TYPE_THERMAL: | |
826 | hid = ACPI_THERMAL_HID; | |
827 | break; | |
828 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
829 | hid = ACPI_BUTTON_HID_POWERF; | |
830 | break; | |
831 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
832 | hid = ACPI_BUTTON_HID_SLEEPF; | |
833 | break; | |
834 | } | |
835 | ||
836 | /* | |
837 | * \_SB | |
838 | * ---- | |
839 | * Fix for the system root bus device -- the only root-level device. | |
840 | */ | |
c51a4de8 | 841 | if (((acpi_handle)parent == ACPI_ROOT_OBJECT) && (type == ACPI_BUS_TYPE_DEVICE)) { |
1da177e4 LT |
842 | hid = ACPI_BUS_HID; |
843 | strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME); | |
844 | strcpy(device->pnp.device_class, ACPI_BUS_CLASS); | |
845 | } | |
846 | ||
847 | if (hid) { | |
848 | strcpy(device->pnp.hardware_id, hid); | |
849 | device->flags.hardware_id = 1; | |
850 | } | |
851 | if (uid) { | |
852 | strcpy(device->pnp.unique_id, uid); | |
853 | device->flags.unique_id = 1; | |
854 | } | |
855 | if (cid_list) { | |
856 | device->pnp.cid_list = kmalloc(cid_list->size, GFP_KERNEL); | |
857 | if (device->pnp.cid_list) | |
858 | memcpy(device->pnp.cid_list, cid_list, cid_list->size); | |
859 | else | |
860 | printk(KERN_ERR "Memory allocation error\n"); | |
861 | } | |
862 | ||
02438d87 | 863 | kfree(buffer.pointer); |
1da177e4 LT |
864 | } |
865 | ||
4be44fcd | 866 | static int acpi_device_set_context(struct acpi_device *device, int type) |
1da177e4 LT |
867 | { |
868 | acpi_status status = AE_OK; | |
869 | int result = 0; | |
870 | /* | |
871 | * Context | |
872 | * ------- | |
873 | * Attach this 'struct acpi_device' to the ACPI object. This makes | |
874 | * resolutions from handle->device very efficient. Note that we need | |
875 | * to be careful with fixed-feature devices as they all attach to the | |
876 | * root object. | |
877 | */ | |
4be44fcd | 878 | if (type != ACPI_BUS_TYPE_POWER_BUTTON && |
1da177e4 LT |
879 | type != ACPI_BUS_TYPE_SLEEP_BUTTON) { |
880 | status = acpi_attach_data(device->handle, | |
4be44fcd | 881 | acpi_bus_data_handler, device); |
1da177e4 LT |
882 | |
883 | if (ACPI_FAILURE(status)) { | |
884 | printk("Error attaching device data\n"); | |
885 | result = -ENODEV; | |
886 | } | |
887 | } | |
888 | return result; | |
889 | } | |
890 | ||
4be44fcd LB |
891 | static void acpi_device_get_debug_info(struct acpi_device *device, |
892 | acpi_handle handle, int type) | |
1da177e4 LT |
893 | { |
894 | #ifdef CONFIG_ACPI_DEBUG_OUTPUT | |
4be44fcd LB |
895 | char *type_string = NULL; |
896 | char name[80] = { '?', '\0' }; | |
897 | struct acpi_buffer buffer = { sizeof(name), name }; | |
1da177e4 LT |
898 | |
899 | switch (type) { | |
900 | case ACPI_BUS_TYPE_DEVICE: | |
901 | type_string = "Device"; | |
902 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
903 | break; | |
904 | case ACPI_BUS_TYPE_POWER: | |
905 | type_string = "Power Resource"; | |
906 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
907 | break; | |
908 | case ACPI_BUS_TYPE_PROCESSOR: | |
909 | type_string = "Processor"; | |
910 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
911 | break; | |
912 | case ACPI_BUS_TYPE_SYSTEM: | |
913 | type_string = "System"; | |
914 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
915 | break; | |
916 | case ACPI_BUS_TYPE_THERMAL: | |
917 | type_string = "Thermal Zone"; | |
918 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
919 | break; | |
920 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
921 | type_string = "Power Button"; | |
922 | sprintf(name, "PWRB"); | |
923 | break; | |
924 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
925 | type_string = "Sleep Button"; | |
926 | sprintf(name, "SLPB"); | |
927 | break; | |
928 | } | |
929 | ||
930 | printk(KERN_DEBUG "Found %s %s [%p]\n", type_string, name, handle); | |
4be44fcd | 931 | #endif /*CONFIG_ACPI_DEBUG_OUTPUT */ |
1da177e4 LT |
932 | } |
933 | ||
4be44fcd | 934 | static int acpi_bus_remove(struct acpi_device *dev, int rmdevice) |
1da177e4 | 935 | { |
4be44fcd LB |
936 | int result = 0; |
937 | struct acpi_driver *driver; | |
938 | ||
1da177e4 LT |
939 | |
940 | if (!dev) | |
d550d98d | 941 | return -EINVAL; |
1da177e4 LT |
942 | |
943 | driver = dev->driver; | |
944 | ||
945 | if ((driver) && (driver->ops.remove)) { | |
946 | ||
947 | if (driver->ops.stop) { | |
948 | result = driver->ops.stop(dev, ACPI_BUS_REMOVAL_EJECT); | |
949 | if (result) | |
d550d98d | 950 | return result; |
1da177e4 LT |
951 | } |
952 | ||
953 | result = dev->driver->ops.remove(dev, ACPI_BUS_REMOVAL_EJECT); | |
954 | if (result) { | |
d550d98d | 955 | return result; |
1da177e4 LT |
956 | } |
957 | ||
958 | atomic_dec(&dev->driver->references); | |
959 | dev->driver = NULL; | |
960 | acpi_driver_data(dev) = NULL; | |
961 | } | |
962 | ||
963 | if (!rmdevice) | |
d550d98d | 964 | return 0; |
1da177e4 LT |
965 | |
966 | if (dev->flags.bus_address) { | |
967 | if ((dev->parent) && (dev->parent->ops.unbind)) | |
968 | dev->parent->ops.unbind(dev); | |
969 | } | |
4be44fcd | 970 | |
1da177e4 LT |
971 | acpi_device_unregister(dev, ACPI_BUS_REMOVAL_EJECT); |
972 | ||
d550d98d | 973 | return 0; |
1da177e4 LT |
974 | } |
975 | ||
3fb02738 | 976 | static int |
4be44fcd LB |
977 | acpi_add_single_object(struct acpi_device **child, |
978 | struct acpi_device *parent, acpi_handle handle, int type) | |
1da177e4 | 979 | { |
4be44fcd LB |
980 | int result = 0; |
981 | struct acpi_device *device = NULL; | |
1da177e4 | 982 | |
1da177e4 LT |
983 | |
984 | if (!child) | |
d550d98d | 985 | return -EINVAL; |
1da177e4 LT |
986 | |
987 | device = kmalloc(sizeof(struct acpi_device), GFP_KERNEL); | |
988 | if (!device) { | |
6468463a | 989 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 990 | return -ENOMEM; |
1da177e4 LT |
991 | } |
992 | memset(device, 0, sizeof(struct acpi_device)); | |
993 | ||
994 | device->handle = handle; | |
995 | device->parent = parent; | |
996 | ||
4be44fcd | 997 | acpi_device_get_busid(device, handle, type); |
1da177e4 LT |
998 | |
999 | /* | |
1000 | * Flags | |
1001 | * ----- | |
1002 | * Get prior to calling acpi_bus_get_status() so we know whether | |
1003 | * or not _STA is present. Note that we only look for object | |
1004 | * handles -- cannot evaluate objects until we know the device is | |
1005 | * present and properly initialized. | |
1006 | */ | |
1007 | result = acpi_bus_get_flags(device); | |
1008 | if (result) | |
1009 | goto end; | |
1010 | ||
1011 | /* | |
1012 | * Status | |
1013 | * ------ | |
6940faba KT |
1014 | * See if the device is present. We always assume that non-Device |
1015 | * and non-Processor objects (e.g. thermal zones, power resources, | |
1016 | * etc.) are present, functioning, etc. (at least when parent object | |
1017 | * is present). Note that _STA has a different meaning for some | |
1018 | * objects (e.g. power resources) so we need to be careful how we use | |
1019 | * it. | |
1da177e4 LT |
1020 | */ |
1021 | switch (type) { | |
6940faba | 1022 | case ACPI_BUS_TYPE_PROCESSOR: |
1da177e4 LT |
1023 | case ACPI_BUS_TYPE_DEVICE: |
1024 | result = acpi_bus_get_status(device); | |
1025 | if (ACPI_FAILURE(result) || !device->status.present) { | |
1026 | result = -ENOENT; | |
1027 | goto end; | |
1028 | } | |
1029 | break; | |
1030 | default: | |
1031 | STRUCT_TO_INT(device->status) = 0x0F; | |
1032 | break; | |
1033 | } | |
1034 | ||
1035 | /* | |
1036 | * Initialize Device | |
1037 | * ----------------- | |
1038 | * TBD: Synch with Core's enumeration/initialization process. | |
1039 | */ | |
1040 | ||
1041 | /* | |
1042 | * Hardware ID, Unique ID, & Bus Address | |
1043 | * ------------------------------------- | |
1044 | */ | |
4be44fcd | 1045 | acpi_device_set_id(device, parent, handle, type); |
1da177e4 LT |
1046 | |
1047 | /* | |
1048 | * Power Management | |
1049 | * ---------------- | |
1050 | */ | |
1051 | if (device->flags.power_manageable) { | |
1052 | result = acpi_bus_get_power_flags(device); | |
1053 | if (result) | |
1054 | goto end; | |
1055 | } | |
1056 | ||
4be44fcd | 1057 | /* |
1da177e4 LT |
1058 | * Wakeup device management |
1059 | *----------------------- | |
1060 | */ | |
1061 | if (device->flags.wake_capable) { | |
1062 | result = acpi_bus_get_wakeup_device_flags(device); | |
1063 | if (result) | |
1064 | goto end; | |
1065 | } | |
1066 | ||
1067 | /* | |
1068 | * Performance Management | |
1069 | * ---------------------- | |
1070 | */ | |
1071 | if (device->flags.performance_manageable) { | |
1072 | result = acpi_bus_get_perf_flags(device); | |
1073 | if (result) | |
1074 | goto end; | |
1075 | } | |
1076 | ||
4be44fcd | 1077 | if ((result = acpi_device_set_context(device, type))) |
1da177e4 LT |
1078 | goto end; |
1079 | ||
4be44fcd | 1080 | acpi_device_get_debug_info(device, handle, type); |
1da177e4 | 1081 | |
4be44fcd | 1082 | acpi_device_register(device, parent); |
1da177e4 LT |
1083 | |
1084 | /* | |
1085 | * Bind _ADR-Based Devices | |
1086 | * ----------------------- | |
1087 | * If there's a a bus address (_ADR) then we utilize the parent's | |
1088 | * 'bind' function (if exists) to bind the ACPI- and natively- | |
1089 | * enumerated device representations. | |
1090 | */ | |
1091 | if (device->flags.bus_address) { | |
1092 | if (device->parent && device->parent->ops.bind) | |
1093 | device->parent->ops.bind(device); | |
1094 | } | |
1095 | ||
1096 | /* | |
1097 | * Locate & Attach Driver | |
1098 | * ---------------------- | |
1099 | * If there's a hardware id (_HID) or compatible ids (_CID) we check | |
1100 | * to see if there's a driver installed for this kind of device. Note | |
1101 | * that drivers can install before or after a device is enumerated. | |
1102 | * | |
1103 | * TBD: Assumes LDM provides driver hot-plug capability. | |
1104 | */ | |
bd7ce5b5 | 1105 | acpi_bus_find_driver(device); |
1da177e4 | 1106 | |
4be44fcd | 1107 | end: |
1da177e4 LT |
1108 | if (!result) |
1109 | *child = device; | |
1110 | else { | |
6044ec88 | 1111 | kfree(device->pnp.cid_list); |
1da177e4 LT |
1112 | kfree(device); |
1113 | } | |
1114 | ||
d550d98d | 1115 | return result; |
1da177e4 | 1116 | } |
1da177e4 | 1117 | |
4be44fcd | 1118 | static int acpi_bus_scan(struct acpi_device *start, struct acpi_bus_ops *ops) |
1da177e4 | 1119 | { |
4be44fcd LB |
1120 | acpi_status status = AE_OK; |
1121 | struct acpi_device *parent = NULL; | |
1122 | struct acpi_device *child = NULL; | |
1123 | acpi_handle phandle = NULL; | |
1124 | acpi_handle chandle = NULL; | |
1125 | acpi_object_type type = 0; | |
1126 | u32 level = 1; | |
1da177e4 | 1127 | |
1da177e4 LT |
1128 | |
1129 | if (!start) | |
d550d98d | 1130 | return -EINVAL; |
1da177e4 LT |
1131 | |
1132 | parent = start; | |
1133 | phandle = start->handle; | |
4be44fcd | 1134 | |
1da177e4 LT |
1135 | /* |
1136 | * Parse through the ACPI namespace, identify all 'devices', and | |
1137 | * create a new 'struct acpi_device' for each. | |
1138 | */ | |
1139 | while ((level > 0) && parent) { | |
1140 | ||
1141 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, | |
4be44fcd | 1142 | chandle, &chandle); |
1da177e4 LT |
1143 | |
1144 | /* | |
1145 | * If this scope is exhausted then move our way back up. | |
1146 | */ | |
1147 | if (ACPI_FAILURE(status)) { | |
1148 | level--; | |
1149 | chandle = phandle; | |
1150 | acpi_get_parent(phandle, &phandle); | |
1151 | if (parent->parent) | |
1152 | parent = parent->parent; | |
1153 | continue; | |
1154 | } | |
1155 | ||
1156 | status = acpi_get_type(chandle, &type); | |
1157 | if (ACPI_FAILURE(status)) | |
1158 | continue; | |
1159 | ||
1160 | /* | |
1161 | * If this is a scope object then parse it (depth-first). | |
1162 | */ | |
1163 | if (type == ACPI_TYPE_LOCAL_SCOPE) { | |
1164 | level++; | |
1165 | phandle = chandle; | |
1166 | chandle = NULL; | |
1167 | continue; | |
1168 | } | |
1169 | ||
1170 | /* | |
1171 | * We're only interested in objects that we consider 'devices'. | |
1172 | */ | |
1173 | switch (type) { | |
1174 | case ACPI_TYPE_DEVICE: | |
1175 | type = ACPI_BUS_TYPE_DEVICE; | |
1176 | break; | |
1177 | case ACPI_TYPE_PROCESSOR: | |
1178 | type = ACPI_BUS_TYPE_PROCESSOR; | |
1179 | break; | |
1180 | case ACPI_TYPE_THERMAL: | |
1181 | type = ACPI_BUS_TYPE_THERMAL; | |
1182 | break; | |
1183 | case ACPI_TYPE_POWER: | |
1184 | type = ACPI_BUS_TYPE_POWER; | |
1185 | break; | |
1186 | default: | |
1187 | continue; | |
1188 | } | |
1189 | ||
3fb02738 RS |
1190 | if (ops->acpi_op_add) |
1191 | status = acpi_add_single_object(&child, parent, | |
4be44fcd LB |
1192 | chandle, type); |
1193 | else | |
3fb02738 RS |
1194 | status = acpi_bus_get_device(chandle, &child); |
1195 | ||
4be44fcd LB |
1196 | if (ACPI_FAILURE(status)) |
1197 | continue; | |
3fb02738 RS |
1198 | |
1199 | if (ops->acpi_op_start) { | |
1200 | status = acpi_start_single_object(child); | |
1201 | if (ACPI_FAILURE(status)) | |
1202 | continue; | |
1203 | } | |
1da177e4 LT |
1204 | |
1205 | /* | |
1206 | * If the device is present, enabled, and functioning then | |
1207 | * parse its scope (depth-first). Note that we need to | |
1208 | * represent absent devices to facilitate PnP notifications | |
1209 | * -- but only the subtree head (not all of its children, | |
1210 | * which will be enumerated when the parent is inserted). | |
1211 | * | |
1212 | * TBD: Need notifications and other detection mechanisms | |
4be44fcd | 1213 | * in place before we can fully implement this. |
1da177e4 LT |
1214 | */ |
1215 | if (child->status.present) { | |
1216 | status = acpi_get_next_object(ACPI_TYPE_ANY, chandle, | |
1217 | NULL, NULL); | |
1218 | if (ACPI_SUCCESS(status)) { | |
1219 | level++; | |
1220 | phandle = chandle; | |
1221 | chandle = NULL; | |
1222 | parent = child; | |
1223 | } | |
1224 | } | |
1225 | } | |
1226 | ||
d550d98d | 1227 | return 0; |
1da177e4 | 1228 | } |
1da177e4 | 1229 | |
3fb02738 | 1230 | int |
4be44fcd LB |
1231 | acpi_bus_add(struct acpi_device **child, |
1232 | struct acpi_device *parent, acpi_handle handle, int type) | |
3fb02738 RS |
1233 | { |
1234 | int result; | |
1235 | struct acpi_bus_ops ops; | |
1236 | ||
3fb02738 RS |
1237 | |
1238 | result = acpi_add_single_object(child, parent, handle, type); | |
1239 | if (!result) { | |
1240 | memset(&ops, 0, sizeof(ops)); | |
1241 | ops.acpi_op_add = 1; | |
1242 | result = acpi_bus_scan(*child, &ops); | |
1243 | } | |
d550d98d | 1244 | return result; |
3fb02738 | 1245 | } |
4be44fcd | 1246 | |
3fb02738 RS |
1247 | EXPORT_SYMBOL(acpi_bus_add); |
1248 | ||
4be44fcd | 1249 | int acpi_bus_start(struct acpi_device *device) |
3fb02738 RS |
1250 | { |
1251 | int result; | |
1252 | struct acpi_bus_ops ops; | |
1253 | ||
3fb02738 RS |
1254 | |
1255 | if (!device) | |
d550d98d | 1256 | return -EINVAL; |
3fb02738 RS |
1257 | |
1258 | result = acpi_start_single_object(device); | |
1259 | if (!result) { | |
1260 | memset(&ops, 0, sizeof(ops)); | |
1261 | ops.acpi_op_start = 1; | |
1262 | result = acpi_bus_scan(device, &ops); | |
1263 | } | |
d550d98d | 1264 | return result; |
3fb02738 | 1265 | } |
4be44fcd | 1266 | |
3fb02738 | 1267 | EXPORT_SYMBOL(acpi_bus_start); |
1da177e4 | 1268 | |
ceaba663 | 1269 | int acpi_bus_trim(struct acpi_device *start, int rmdevice) |
1da177e4 | 1270 | { |
4be44fcd LB |
1271 | acpi_status status; |
1272 | struct acpi_device *parent, *child; | |
1273 | acpi_handle phandle, chandle; | |
1274 | acpi_object_type type; | |
1275 | u32 level = 1; | |
1276 | int err = 0; | |
1277 | ||
1278 | parent = start; | |
1da177e4 LT |
1279 | phandle = start->handle; |
1280 | child = chandle = NULL; | |
1281 | ||
1282 | while ((level > 0) && parent && (!err)) { | |
1283 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, | |
4be44fcd | 1284 | chandle, &chandle); |
1da177e4 LT |
1285 | |
1286 | /* | |
1287 | * If this scope is exhausted then move our way back up. | |
1288 | */ | |
1289 | if (ACPI_FAILURE(status)) { | |
1290 | level--; | |
1291 | chandle = phandle; | |
1292 | acpi_get_parent(phandle, &phandle); | |
1293 | child = parent; | |
1294 | parent = parent->parent; | |
1295 | ||
1296 | if (level == 0) | |
1297 | err = acpi_bus_remove(child, rmdevice); | |
1298 | else | |
1299 | err = acpi_bus_remove(child, 1); | |
1300 | ||
1301 | continue; | |
1302 | } | |
1303 | ||
1304 | status = acpi_get_type(chandle, &type); | |
1305 | if (ACPI_FAILURE(status)) { | |
1306 | continue; | |
1307 | } | |
1308 | /* | |
1309 | * If there is a device corresponding to chandle then | |
1310 | * parse it (depth-first). | |
1311 | */ | |
1312 | if (acpi_bus_get_device(chandle, &child) == 0) { | |
1313 | level++; | |
1314 | phandle = chandle; | |
1315 | chandle = NULL; | |
1316 | parent = child; | |
1317 | } | |
1318 | continue; | |
1319 | } | |
1320 | return err; | |
1321 | } | |
ceaba663 KA |
1322 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
1323 | ||
1da177e4 | 1324 | |
4be44fcd | 1325 | static int acpi_bus_scan_fixed(struct acpi_device *root) |
1da177e4 | 1326 | { |
4be44fcd LB |
1327 | int result = 0; |
1328 | struct acpi_device *device = NULL; | |
1da177e4 | 1329 | |
1da177e4 LT |
1330 | |
1331 | if (!root) | |
d550d98d | 1332 | return -ENODEV; |
1da177e4 LT |
1333 | |
1334 | /* | |
1335 | * Enumerate all fixed-feature devices. | |
1336 | */ | |
3fb02738 RS |
1337 | if (acpi_fadt.pwr_button == 0) { |
1338 | result = acpi_add_single_object(&device, acpi_root, | |
4be44fcd LB |
1339 | NULL, |
1340 | ACPI_BUS_TYPE_POWER_BUTTON); | |
3fb02738 RS |
1341 | if (!result) |
1342 | result = acpi_start_single_object(device); | |
1343 | } | |
1da177e4 | 1344 | |
3fb02738 RS |
1345 | if (acpi_fadt.sleep_button == 0) { |
1346 | result = acpi_add_single_object(&device, acpi_root, | |
4be44fcd LB |
1347 | NULL, |
1348 | ACPI_BUS_TYPE_SLEEP_BUTTON); | |
3fb02738 RS |
1349 | if (!result) |
1350 | result = acpi_start_single_object(device); | |
1351 | } | |
1da177e4 | 1352 | |
d550d98d | 1353 | return result; |
1da177e4 LT |
1354 | } |
1355 | ||
5b327265 | 1356 | |
531881d6 | 1357 | static inline struct acpi_device * to_acpi_dev(struct device * dev) |
5b327265 PM |
1358 | { |
1359 | return container_of(dev, struct acpi_device, dev); | |
1360 | } | |
1361 | ||
1362 | ||
531881d6 | 1363 | static int root_suspend(struct acpi_device * acpi_dev, pm_message_t state) |
5b327265 PM |
1364 | { |
1365 | struct acpi_device * dev, * next; | |
1366 | int result; | |
1367 | ||
1368 | spin_lock(&acpi_device_lock); | |
1369 | list_for_each_entry_safe_reverse(dev, next, &acpi_device_list, g_list) { | |
1370 | if (dev->driver && dev->driver->ops.suspend) { | |
1371 | spin_unlock(&acpi_device_lock); | |
5b327265 PM |
1372 | result = dev->driver->ops.suspend(dev, 0); |
1373 | if (result) { | |
1374 | printk(KERN_ERR PREFIX "[%s - %s] Suspend failed: %d\n", | |
1375 | acpi_device_name(dev), | |
1376 | acpi_device_bid(dev), result); | |
1377 | } | |
1378 | spin_lock(&acpi_device_lock); | |
1379 | } | |
1380 | } | |
1381 | spin_unlock(&acpi_device_lock); | |
1382 | return 0; | |
1383 | } | |
1384 | ||
1385 | ||
1386 | static int acpi_device_suspend(struct device * dev, pm_message_t state) | |
1387 | { | |
1388 | struct acpi_device * acpi_dev = to_acpi_dev(dev); | |
1389 | ||
1390 | /* | |
1391 | * For now, we should only register 1 generic device - | |
1392 | * the ACPI root device - and from there, we walk the | |
1393 | * tree of ACPI devices to suspend each one using the | |
1394 | * ACPI driver methods. | |
1395 | */ | |
1396 | if (acpi_dev->handle == ACPI_ROOT_OBJECT) | |
531881d6 | 1397 | root_suspend(acpi_dev, state); |
5b327265 PM |
1398 | return 0; |
1399 | } | |
1400 | ||
1401 | ||
1402 | ||
1403 | static int root_resume(struct acpi_device * acpi_dev) | |
1404 | { | |
1405 | struct acpi_device * dev, * next; | |
1406 | int result; | |
1407 | ||
1408 | spin_lock(&acpi_device_lock); | |
1409 | list_for_each_entry_safe(dev, next, &acpi_device_list, g_list) { | |
1410 | if (dev->driver && dev->driver->ops.resume) { | |
1411 | spin_unlock(&acpi_device_lock); | |
5b327265 PM |
1412 | result = dev->driver->ops.resume(dev, 0); |
1413 | if (result) { | |
1414 | printk(KERN_ERR PREFIX "[%s - %s] resume failed: %d\n", | |
1415 | acpi_device_name(dev), | |
1416 | acpi_device_bid(dev), result); | |
1417 | } | |
1418 | spin_lock(&acpi_device_lock); | |
1419 | } | |
1420 | } | |
1421 | spin_unlock(&acpi_device_lock); | |
1422 | return 0; | |
1423 | } | |
1424 | ||
1425 | ||
1426 | static int acpi_device_resume(struct device * dev) | |
1427 | { | |
1428 | struct acpi_device * acpi_dev = to_acpi_dev(dev); | |
1429 | ||
1430 | /* | |
1431 | * For now, we should only register 1 generic device - | |
1432 | * the ACPI root device - and from there, we walk the | |
1433 | * tree of ACPI devices to resume each one using the | |
1434 | * ACPI driver methods. | |
1435 | */ | |
1436 | if (acpi_dev->handle == ACPI_ROOT_OBJECT) | |
1437 | root_resume(acpi_dev); | |
1438 | return 0; | |
1439 | } | |
1440 | ||
1441 | ||
9e5289f4 | 1442 | static struct bus_type acpi_bus_type = { |
5b327265 PM |
1443 | .name = "acpi", |
1444 | .suspend = acpi_device_suspend, | |
1445 | .resume = acpi_device_resume, | |
1446 | }; | |
1447 | ||
1448 | ||
1449 | ||
1da177e4 LT |
1450 | static int __init acpi_scan_init(void) |
1451 | { | |
1452 | int result; | |
3fb02738 | 1453 | struct acpi_bus_ops ops; |
1da177e4 | 1454 | |
1da177e4 LT |
1455 | |
1456 | if (acpi_disabled) | |
d550d98d | 1457 | return 0; |
1da177e4 | 1458 | |
9b6d97b6 RD |
1459 | result = kset_register(&acpi_namespace_kset); |
1460 | if (result < 0) | |
1461 | printk(KERN_ERR PREFIX "kset_register error: %d\n", result); | |
1da177e4 | 1462 | |
5b327265 PM |
1463 | result = bus_register(&acpi_bus_type); |
1464 | if (result) { | |
1465 | /* We don't want to quit even if we failed to add suspend/resume */ | |
1466 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
1467 | } | |
1468 | ||
1da177e4 LT |
1469 | /* |
1470 | * Create the root device in the bus's device tree | |
1471 | */ | |
3fb02738 | 1472 | result = acpi_add_single_object(&acpi_root, NULL, ACPI_ROOT_OBJECT, |
4be44fcd | 1473 | ACPI_BUS_TYPE_SYSTEM); |
1da177e4 LT |
1474 | if (result) |
1475 | goto Done; | |
1476 | ||
3fb02738 | 1477 | result = acpi_start_single_object(acpi_root); |
5b327265 PM |
1478 | if (result) |
1479 | goto Done; | |
1480 | ||
1481 | acpi_root->dev.bus = &acpi_bus_type; | |
1482 | snprintf(acpi_root->dev.bus_id, BUS_ID_SIZE, "%s", acpi_bus_type.name); | |
1483 | result = device_register(&acpi_root->dev); | |
1484 | if (result) { | |
1485 | /* We don't want to quit even if we failed to add suspend/resume */ | |
1486 | printk(KERN_ERR PREFIX "Could not register device\n"); | |
1487 | } | |
3fb02738 | 1488 | |
1da177e4 LT |
1489 | /* |
1490 | * Enumerate devices in the ACPI namespace. | |
1491 | */ | |
1492 | result = acpi_bus_scan_fixed(acpi_root); | |
3fb02738 RS |
1493 | if (!result) { |
1494 | memset(&ops, 0, sizeof(ops)); | |
1495 | ops.acpi_op_add = 1; | |
1496 | ops.acpi_op_start = 1; | |
1497 | result = acpi_bus_scan(acpi_root, &ops); | |
1498 | } | |
1da177e4 LT |
1499 | |
1500 | if (result) | |
1501 | acpi_device_unregister(acpi_root, ACPI_BUS_REMOVAL_NORMAL); | |
1502 | ||
4be44fcd | 1503 | Done: |
d550d98d | 1504 | return result; |
1da177e4 LT |
1505 | } |
1506 | ||
1507 | subsys_initcall(acpi_scan_init); |