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Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * scan.c - support for transforming the ACPI namespace into individual objects | |
3 | */ | |
4 | ||
5 | #include <linux/module.h> | |
6 | #include <linux/init.h> | |
9b6d97b6 | 7 | #include <linux/kernel.h> |
1da177e4 | 8 | #include <linux/acpi.h> |
74523c90 AK |
9 | #include <linux/signal.h> |
10 | #include <linux/kthread.h> | |
1da177e4 LT |
11 | |
12 | #include <acpi/acpi_drivers.h> | |
1da177e4 | 13 | |
e60cc7a6 BH |
14 | #include "internal.h" |
15 | ||
1da177e4 | 16 | #define _COMPONENT ACPI_BUS_COMPONENT |
f52fd66d | 17 | ACPI_MODULE_NAME("scan"); |
1da177e4 | 18 | #define STRUCT_TO_INT(s) (*((int*)&s)) |
4be44fcd | 19 | extern struct acpi_device *acpi_root; |
1da177e4 LT |
20 | |
21 | #define ACPI_BUS_CLASS "system_bus" | |
29b71a1c | 22 | #define ACPI_BUS_HID "LNXSYBUS" |
1da177e4 LT |
23 | #define ACPI_BUS_DEVICE_NAME "System Bus" |
24 | ||
25 | static LIST_HEAD(acpi_device_list); | |
e49bd2dd | 26 | static LIST_HEAD(acpi_bus_id_list); |
9090589d | 27 | DEFINE_MUTEX(acpi_device_lock); |
1da177e4 LT |
28 | LIST_HEAD(acpi_wakeup_device_list); |
29 | ||
e49bd2dd | 30 | struct acpi_device_bus_id{ |
bb095854 | 31 | char bus_id[15]; |
e49bd2dd ZR |
32 | unsigned int instance_no; |
33 | struct list_head node; | |
1da177e4 | 34 | }; |
29b71a1c TR |
35 | |
36 | /* | |
37 | * Creates hid/cid(s) string needed for modalias and uevent | |
38 | * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: | |
39 | * char *modalias: "acpi:IBM0001:ACPI0001" | |
40 | */ | |
b3e572d2 AB |
41 | static int create_modalias(struct acpi_device *acpi_dev, char *modalias, |
42 | int size) | |
43 | { | |
29b71a1c | 44 | int len; |
5c9fcb5d | 45 | int count; |
29b71a1c | 46 | |
5c9fcb5d | 47 | if (!acpi_dev->flags.hardware_id && !acpi_dev->flags.compatible_ids) |
29b71a1c TR |
48 | return -ENODEV; |
49 | ||
5c9fcb5d | 50 | len = snprintf(modalias, size, "acpi:"); |
29b71a1c TR |
51 | size -= len; |
52 | ||
5c9fcb5d ZR |
53 | if (acpi_dev->flags.hardware_id) { |
54 | count = snprintf(&modalias[len], size, "%s:", | |
55 | acpi_dev->pnp.hardware_id); | |
56 | if (count < 0 || count >= size) | |
57 | return -EINVAL; | |
58 | len += count; | |
59 | size -= count; | |
60 | } | |
61 | ||
29b71a1c TR |
62 | if (acpi_dev->flags.compatible_ids) { |
63 | struct acpi_compatible_id_list *cid_list; | |
64 | int i; | |
29b71a1c TR |
65 | |
66 | cid_list = acpi_dev->pnp.cid_list; | |
67 | for (i = 0; i < cid_list->count; i++) { | |
68 | count = snprintf(&modalias[len], size, "%s:", | |
69 | cid_list->id[i].value); | |
70 | if (count < 0 || count >= size) { | |
87ecd5cd | 71 | printk(KERN_ERR PREFIX "%s cid[%i] exceeds event buffer size", |
29b71a1c TR |
72 | acpi_dev->pnp.device_name, i); |
73 | break; | |
74 | } | |
75 | len += count; | |
76 | size -= count; | |
77 | } | |
78 | } | |
79 | ||
80 | modalias[len] = '\0'; | |
81 | return len; | |
82 | } | |
83 | ||
84 | static ssize_t | |
85 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
86 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
87 | int len; | |
88 | ||
89 | /* Device has no HID and no CID or string is >1024 */ | |
90 | len = create_modalias(acpi_dev, buf, 1024); | |
91 | if (len <= 0) | |
92 | return 0; | |
93 | buf[len++] = '\n'; | |
94 | return len; | |
95 | } | |
96 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); | |
97 | ||
c8d72a5e | 98 | static void acpi_bus_hot_remove_device(void *context) |
1da177e4 | 99 | { |
26d46867 ZR |
100 | struct acpi_device *device; |
101 | acpi_handle handle = context; | |
1da177e4 LT |
102 | struct acpi_object_list arg_list; |
103 | union acpi_object arg; | |
104 | acpi_status status = AE_OK; | |
1da177e4 | 105 | |
26d46867 | 106 | if (acpi_bus_get_device(handle, &device)) |
c8d72a5e | 107 | return; |
26d46867 ZR |
108 | |
109 | if (!device) | |
c8d72a5e | 110 | return; |
26d46867 ZR |
111 | |
112 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
0794469d | 113 | "Hot-removing device %s...\n", dev_name(&device->dev))); |
26d46867 ZR |
114 | |
115 | if (acpi_bus_trim(device, 1)) { | |
55ac9a01 LM |
116 | printk(KERN_ERR PREFIX |
117 | "Removing device failed\n"); | |
c8d72a5e | 118 | return; |
26d46867 | 119 | } |
1da177e4 | 120 | |
26d46867 ZR |
121 | /* power off device */ |
122 | status = acpi_evaluate_object(handle, "_PS3", NULL, NULL); | |
123 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) | |
55ac9a01 LM |
124 | printk(KERN_WARNING PREFIX |
125 | "Power-off device failed\n"); | |
26d46867 ZR |
126 | |
127 | if (device->flags.lockable) { | |
1da177e4 LT |
128 | arg_list.count = 1; |
129 | arg_list.pointer = &arg; | |
130 | arg.type = ACPI_TYPE_INTEGER; | |
131 | arg.integer.value = 0; | |
132 | acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); | |
133 | } | |
1da177e4 | 134 | |
1da177e4 LT |
135 | arg_list.count = 1; |
136 | arg_list.pointer = &arg; | |
137 | arg.type = ACPI_TYPE_INTEGER; | |
138 | arg.integer.value = 1; | |
1da177e4 | 139 | |
1da177e4 LT |
140 | /* |
141 | * TBD: _EJD support. | |
142 | */ | |
1da177e4 | 143 | status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); |
26d46867 | 144 | if (ACPI_FAILURE(status)) |
c8d72a5e ZR |
145 | printk(KERN_WARNING PREFIX |
146 | "Eject device failed\n"); | |
1da177e4 | 147 | |
c8d72a5e | 148 | return; |
1da177e4 LT |
149 | } |
150 | ||
1da177e4 | 151 | static ssize_t |
f883d9db PM |
152 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
153 | const char *buf, size_t count) | |
1da177e4 | 154 | { |
4be44fcd | 155 | int ret = count; |
4be44fcd | 156 | acpi_status status; |
4be44fcd | 157 | acpi_object_type type = 0; |
f883d9db | 158 | struct acpi_device *acpi_device = to_acpi_device(d); |
1da177e4 | 159 | |
1da177e4 LT |
160 | if ((!count) || (buf[0] != '1')) { |
161 | return -EINVAL; | |
162 | } | |
1da177e4 | 163 | #ifndef FORCE_EJECT |
f883d9db | 164 | if (acpi_device->driver == NULL) { |
1da177e4 LT |
165 | ret = -ENODEV; |
166 | goto err; | |
167 | } | |
168 | #endif | |
f883d9db PM |
169 | status = acpi_get_type(acpi_device->handle, &type); |
170 | if (ACPI_FAILURE(status) || (!acpi_device->flags.ejectable)) { | |
1da177e4 LT |
171 | ret = -ENODEV; |
172 | goto err; | |
173 | } | |
1da177e4 | 174 | |
c8d72a5e | 175 | acpi_os_hotplug_execute(acpi_bus_hot_remove_device, acpi_device->handle); |
74523c90 | 176 | err: |
1da177e4 | 177 | return ret; |
1da177e4 LT |
178 | } |
179 | ||
f883d9db | 180 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
1da177e4 | 181 | |
e49bd2dd ZR |
182 | static ssize_t |
183 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
184 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1da177e4 | 185 | |
e49bd2dd | 186 | return sprintf(buf, "%s\n", acpi_dev->pnp.hardware_id); |
1da177e4 | 187 | } |
e49bd2dd | 188 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
1da177e4 | 189 | |
e49bd2dd ZR |
190 | static ssize_t |
191 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
192 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
193 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
194 | int result; | |
1da177e4 | 195 | |
e49bd2dd | 196 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
0c526d96 | 197 | if (result) |
e49bd2dd | 198 | goto end; |
1da177e4 | 199 | |
e49bd2dd ZR |
200 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
201 | kfree(path.pointer); | |
0c526d96 | 202 | end: |
e49bd2dd | 203 | return result; |
1da177e4 | 204 | } |
e49bd2dd | 205 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
1da177e4 | 206 | |
e49bd2dd | 207 | static int acpi_device_setup_files(struct acpi_device *dev) |
1da177e4 | 208 | { |
f883d9db PM |
209 | acpi_status status; |
210 | acpi_handle temp; | |
e49bd2dd | 211 | int result = 0; |
1da177e4 LT |
212 | |
213 | /* | |
e49bd2dd | 214 | * Devices gotten from FADT don't have a "path" attribute |
1da177e4 | 215 | */ |
0c526d96 | 216 | if (dev->handle) { |
e49bd2dd | 217 | result = device_create_file(&dev->dev, &dev_attr_path); |
0c526d96 | 218 | if (result) |
e49bd2dd | 219 | goto end; |
1da177e4 LT |
220 | } |
221 | ||
0c526d96 | 222 | if (dev->flags.hardware_id) { |
e49bd2dd | 223 | result = device_create_file(&dev->dev, &dev_attr_hid); |
0c526d96 | 224 | if (result) |
e49bd2dd ZR |
225 | goto end; |
226 | } | |
1da177e4 | 227 | |
0c526d96 | 228 | if (dev->flags.hardware_id || dev->flags.compatible_ids) { |
29b71a1c | 229 | result = device_create_file(&dev->dev, &dev_attr_modalias); |
0c526d96 | 230 | if (result) |
29b71a1c TR |
231 | goto end; |
232 | } | |
233 | ||
e49bd2dd ZR |
234 | /* |
235 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
236 | * hot-removal function from userland. | |
237 | */ | |
f883d9db PM |
238 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); |
239 | if (ACPI_SUCCESS(status)) | |
e49bd2dd | 240 | result = device_create_file(&dev->dev, &dev_attr_eject); |
0c526d96 | 241 | end: |
e49bd2dd | 242 | return result; |
1da177e4 LT |
243 | } |
244 | ||
f883d9db | 245 | static void acpi_device_remove_files(struct acpi_device *dev) |
1da177e4 | 246 | { |
f883d9db PM |
247 | acpi_status status; |
248 | acpi_handle temp; | |
1da177e4 | 249 | |
f883d9db PM |
250 | /* |
251 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
252 | * hot-removal function from userland. | |
253 | */ | |
254 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); | |
255 | if (ACPI_SUCCESS(status)) | |
256 | device_remove_file(&dev->dev, &dev_attr_eject); | |
1da177e4 | 257 | |
29b71a1c TR |
258 | if (dev->flags.hardware_id || dev->flags.compatible_ids) |
259 | device_remove_file(&dev->dev, &dev_attr_modalias); | |
260 | ||
0c526d96 | 261 | if (dev->flags.hardware_id) |
e49bd2dd | 262 | device_remove_file(&dev->dev, &dev_attr_hid); |
0c526d96 | 263 | if (dev->handle) |
e49bd2dd | 264 | device_remove_file(&dev->dev, &dev_attr_path); |
1da177e4 | 265 | } |
1da177e4 | 266 | /* -------------------------------------------------------------------------- |
9e89dde2 | 267 | ACPI Bus operations |
1da177e4 | 268 | -------------------------------------------------------------------------- */ |
29b71a1c TR |
269 | |
270 | int acpi_match_device_ids(struct acpi_device *device, | |
271 | const struct acpi_device_id *ids) | |
272 | { | |
273 | const struct acpi_device_id *id; | |
274 | ||
39a0ad87 ZY |
275 | /* |
276 | * If the device is not present, it is unnecessary to load device | |
277 | * driver for it. | |
278 | */ | |
279 | if (!device->status.present) | |
280 | return -ENODEV; | |
281 | ||
29b71a1c TR |
282 | if (device->flags.hardware_id) { |
283 | for (id = ids; id->id[0]; id++) { | |
284 | if (!strcmp((char*)id->id, device->pnp.hardware_id)) | |
285 | return 0; | |
286 | } | |
287 | } | |
288 | ||
289 | if (device->flags.compatible_ids) { | |
290 | struct acpi_compatible_id_list *cid_list = device->pnp.cid_list; | |
291 | int i; | |
292 | ||
293 | for (id = ids; id->id[0]; id++) { | |
294 | /* compare multiple _CID entries against driver ids */ | |
295 | for (i = 0; i < cid_list->count; i++) { | |
296 | if (!strcmp((char*)id->id, | |
297 | cid_list->id[i].value)) | |
298 | return 0; | |
299 | } | |
300 | } | |
301 | } | |
302 | ||
303 | return -ENOENT; | |
304 | } | |
305 | EXPORT_SYMBOL(acpi_match_device_ids); | |
306 | ||
1890a97a | 307 | static void acpi_device_release(struct device *dev) |
1da177e4 | 308 | { |
1890a97a | 309 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 310 | |
1890a97a PM |
311 | kfree(acpi_dev->pnp.cid_list); |
312 | kfree(acpi_dev); | |
1da177e4 LT |
313 | } |
314 | ||
5d9464a4 | 315 | static int acpi_device_suspend(struct device *dev, pm_message_t state) |
1da177e4 | 316 | { |
5d9464a4 PM |
317 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
318 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
1da177e4 | 319 | |
5d9464a4 PM |
320 | if (acpi_drv && acpi_drv->ops.suspend) |
321 | return acpi_drv->ops.suspend(acpi_dev, state); | |
1da177e4 LT |
322 | return 0; |
323 | } | |
1da177e4 | 324 | |
5d9464a4 | 325 | static int acpi_device_resume(struct device *dev) |
9e89dde2 | 326 | { |
5d9464a4 PM |
327 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
328 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
1da177e4 | 329 | |
5d9464a4 PM |
330 | if (acpi_drv && acpi_drv->ops.resume) |
331 | return acpi_drv->ops.resume(acpi_dev); | |
d550d98d | 332 | return 0; |
1da177e4 LT |
333 | } |
334 | ||
5d9464a4 | 335 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 336 | { |
5d9464a4 PM |
337 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
338 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
1da177e4 | 339 | |
29b71a1c | 340 | return !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
5d9464a4 | 341 | } |
1da177e4 | 342 | |
7eff2e7a | 343 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 | 344 | { |
5d9464a4 | 345 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
7eff2e7a | 346 | int len; |
5d9464a4 | 347 | |
7eff2e7a KS |
348 | if (add_uevent_var(env, "MODALIAS=")) |
349 | return -ENOMEM; | |
350 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], | |
351 | sizeof(env->buf) - env->buflen); | |
352 | if (len >= (sizeof(env->buf) - env->buflen)) | |
353 | return -ENOMEM; | |
354 | env->buflen += len; | |
9e89dde2 | 355 | return 0; |
1da177e4 LT |
356 | } |
357 | ||
46ec8598 BH |
358 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
359 | { | |
360 | struct acpi_device *device = data; | |
361 | ||
362 | device->driver->ops.notify(device, event); | |
363 | } | |
364 | ||
365 | static acpi_status acpi_device_notify_fixed(void *data) | |
366 | { | |
367 | struct acpi_device *device = data; | |
368 | ||
369 | acpi_device_notify(device->handle, ACPI_FIXED_HARDWARE_EVENT, device); | |
370 | return AE_OK; | |
371 | } | |
372 | ||
373 | static int acpi_device_install_notify_handler(struct acpi_device *device) | |
374 | { | |
375 | acpi_status status; | |
376 | char *hid; | |
377 | ||
378 | hid = acpi_device_hid(device); | |
379 | if (!strcmp(hid, ACPI_BUTTON_HID_POWERF)) | |
380 | status = | |
381 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
382 | acpi_device_notify_fixed, | |
383 | device); | |
384 | else if (!strcmp(hid, ACPI_BUTTON_HID_SLEEPF)) | |
385 | status = | |
386 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
387 | acpi_device_notify_fixed, | |
388 | device); | |
389 | else | |
390 | status = acpi_install_notify_handler(device->handle, | |
391 | ACPI_DEVICE_NOTIFY, | |
392 | acpi_device_notify, | |
393 | device); | |
394 | ||
395 | if (ACPI_FAILURE(status)) | |
396 | return -EINVAL; | |
397 | return 0; | |
398 | } | |
399 | ||
400 | static void acpi_device_remove_notify_handler(struct acpi_device *device) | |
401 | { | |
402 | if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_POWERF)) | |
403 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
404 | acpi_device_notify_fixed); | |
405 | else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_SLEEPF)) | |
406 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
407 | acpi_device_notify_fixed); | |
408 | else | |
409 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, | |
410 | acpi_device_notify); | |
411 | } | |
412 | ||
5d9464a4 PM |
413 | static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *); |
414 | static int acpi_start_single_object(struct acpi_device *); | |
415 | static int acpi_device_probe(struct device * dev) | |
1da177e4 | 416 | { |
5d9464a4 PM |
417 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
418 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
419 | int ret; | |
420 | ||
421 | ret = acpi_bus_driver_init(acpi_dev, acpi_drv); | |
422 | if (!ret) { | |
c4168bff LS |
423 | if (acpi_dev->bus_ops.acpi_op_start) |
424 | acpi_start_single_object(acpi_dev); | |
46ec8598 BH |
425 | |
426 | if (acpi_drv->ops.notify) { | |
427 | ret = acpi_device_install_notify_handler(acpi_dev); | |
428 | if (ret) { | |
429 | if (acpi_drv->ops.stop) | |
430 | acpi_drv->ops.stop(acpi_dev, | |
431 | acpi_dev->removal_type); | |
432 | if (acpi_drv->ops.remove) | |
433 | acpi_drv->ops.remove(acpi_dev, | |
434 | acpi_dev->removal_type); | |
435 | return ret; | |
436 | } | |
437 | } | |
438 | ||
5d9464a4 PM |
439 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
440 | "Found driver [%s] for device [%s]\n", | |
441 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
442 | get_device(dev); | |
443 | } | |
444 | return ret; | |
445 | } | |
1da177e4 | 446 | |
5d9464a4 PM |
447 | static int acpi_device_remove(struct device * dev) |
448 | { | |
449 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
450 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
451 | ||
452 | if (acpi_drv) { | |
46ec8598 BH |
453 | if (acpi_drv->ops.notify) |
454 | acpi_device_remove_notify_handler(acpi_dev); | |
5d9464a4 | 455 | if (acpi_drv->ops.stop) |
96333578 | 456 | acpi_drv->ops.stop(acpi_dev, acpi_dev->removal_type); |
5d9464a4 | 457 | if (acpi_drv->ops.remove) |
96333578 | 458 | acpi_drv->ops.remove(acpi_dev, acpi_dev->removal_type); |
1da177e4 | 459 | } |
5d9464a4 | 460 | acpi_dev->driver = NULL; |
db89b4f0 | 461 | acpi_dev->driver_data = NULL; |
1da177e4 | 462 | |
5d9464a4 | 463 | put_device(dev); |
9e89dde2 ZR |
464 | return 0; |
465 | } | |
1da177e4 | 466 | |
55955aad | 467 | struct bus_type acpi_bus_type = { |
9e89dde2 ZR |
468 | .name = "acpi", |
469 | .suspend = acpi_device_suspend, | |
470 | .resume = acpi_device_resume, | |
5d9464a4 PM |
471 | .match = acpi_bus_match, |
472 | .probe = acpi_device_probe, | |
473 | .remove = acpi_device_remove, | |
474 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
475 | }; |
476 | ||
e49bd2dd | 477 | static int acpi_device_register(struct acpi_device *device, |
9e89dde2 | 478 | struct acpi_device *parent) |
1da177e4 | 479 | { |
4be44fcd | 480 | int result; |
e49bd2dd ZR |
481 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
482 | int found = 0; | |
9e89dde2 ZR |
483 | /* |
484 | * Linkage | |
485 | * ------- | |
486 | * Link this device to its parent and siblings. | |
487 | */ | |
488 | INIT_LIST_HEAD(&device->children); | |
489 | INIT_LIST_HEAD(&device->node); | |
9e89dde2 | 490 | INIT_LIST_HEAD(&device->wakeup_list); |
1da177e4 | 491 | |
e49bd2dd ZR |
492 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
493 | if (!new_bus_id) { | |
494 | printk(KERN_ERR PREFIX "Memory allocation error\n"); | |
495 | return -ENOMEM; | |
1da177e4 | 496 | } |
e49bd2dd | 497 | |
9090589d | 498 | mutex_lock(&acpi_device_lock); |
e49bd2dd ZR |
499 | /* |
500 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
501 | * If failed, create one and link it into acpi_bus_id_list | |
502 | */ | |
503 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
bb095854 | 504 | if(!strcmp(acpi_device_bus_id->bus_id, device->flags.hardware_id? device->pnp.hardware_id : "device")) { |
e49bd2dd ZR |
505 | acpi_device_bus_id->instance_no ++; |
506 | found = 1; | |
507 | kfree(new_bus_id); | |
508 | break; | |
509 | } | |
1da177e4 | 510 | } |
0c526d96 | 511 | if (!found) { |
e49bd2dd | 512 | acpi_device_bus_id = new_bus_id; |
bb095854 | 513 | strcpy(acpi_device_bus_id->bus_id, device->flags.hardware_id ? device->pnp.hardware_id : "device"); |
e49bd2dd ZR |
514 | acpi_device_bus_id->instance_no = 0; |
515 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 516 | } |
0794469d | 517 | dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 518 | |
33b57150 | 519 | if (device->parent) |
9e89dde2 | 520 | list_add_tail(&device->node, &device->parent->children); |
33b57150 | 521 | |
9e89dde2 ZR |
522 | if (device->wakeup.flags.valid) |
523 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
9090589d | 524 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 525 | |
1890a97a PM |
526 | if (device->parent) |
527 | device->dev.parent = &parent->dev; | |
528 | device->dev.bus = &acpi_bus_type; | |
1890a97a | 529 | device->dev.release = &acpi_device_release; |
8b12b922 | 530 | result = device_register(&device->dev); |
0c526d96 | 531 | if (result) { |
8b12b922 | 532 | dev_err(&device->dev, "Error registering device\n"); |
e49bd2dd | 533 | goto end; |
1da177e4 | 534 | } |
1da177e4 | 535 | |
e49bd2dd | 536 | result = acpi_device_setup_files(device); |
0c526d96 | 537 | if (result) |
0794469d KS |
538 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
539 | dev_name(&device->dev)); | |
1da177e4 | 540 | |
96333578 | 541 | device->removal_type = ACPI_BUS_REMOVAL_NORMAL; |
1da177e4 | 542 | return 0; |
0c526d96 | 543 | end: |
9090589d | 544 | mutex_lock(&acpi_device_lock); |
33b57150 | 545 | if (device->parent) |
e49bd2dd | 546 | list_del(&device->node); |
e49bd2dd | 547 | list_del(&device->wakeup_list); |
9090589d | 548 | mutex_unlock(&acpi_device_lock); |
e49bd2dd | 549 | return result; |
1da177e4 LT |
550 | } |
551 | ||
9e89dde2 ZR |
552 | static void acpi_device_unregister(struct acpi_device *device, int type) |
553 | { | |
9090589d | 554 | mutex_lock(&acpi_device_lock); |
33b57150 | 555 | if (device->parent) |
9e89dde2 | 556 | list_del(&device->node); |
1da177e4 | 557 | |
9e89dde2 | 558 | list_del(&device->wakeup_list); |
9090589d | 559 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 560 | |
9e89dde2 | 561 | acpi_detach_data(device->handle, acpi_bus_data_handler); |
1890a97a | 562 | |
f883d9db | 563 | acpi_device_remove_files(device); |
1890a97a | 564 | device_unregister(&device->dev); |
1da177e4 LT |
565 | } |
566 | ||
9e89dde2 ZR |
567 | /* -------------------------------------------------------------------------- |
568 | Driver Management | |
569 | -------------------------------------------------------------------------- */ | |
1da177e4 | 570 | /** |
d758a8fa RD |
571 | * acpi_bus_driver_init - add a device to a driver |
572 | * @device: the device to add and initialize | |
573 | * @driver: driver for the device | |
574 | * | |
0c526d96 | 575 | * Used to initialize a device via its device driver. Called whenever a |
1890a97a | 576 | * driver is bound to a device. Invokes the driver's add() ops. |
1da177e4 LT |
577 | */ |
578 | static int | |
4be44fcd | 579 | acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) |
1da177e4 | 580 | { |
4be44fcd | 581 | int result = 0; |
1da177e4 | 582 | |
1da177e4 | 583 | if (!device || !driver) |
d550d98d | 584 | return -EINVAL; |
1da177e4 LT |
585 | |
586 | if (!driver->ops.add) | |
d550d98d | 587 | return -ENOSYS; |
1da177e4 LT |
588 | |
589 | result = driver->ops.add(device); | |
590 | if (result) { | |
591 | device->driver = NULL; | |
db89b4f0 | 592 | device->driver_data = NULL; |
d550d98d | 593 | return result; |
1da177e4 LT |
594 | } |
595 | ||
596 | device->driver = driver; | |
597 | ||
598 | /* | |
599 | * TBD - Configuration Management: Assign resources to device based | |
600 | * upon possible configuration and currently allocated resources. | |
601 | */ | |
602 | ||
4be44fcd LB |
603 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
604 | "Driver successfully bound to device\n")); | |
d550d98d | 605 | return 0; |
3fb02738 RS |
606 | } |
607 | ||
8713cbef | 608 | static int acpi_start_single_object(struct acpi_device *device) |
3fb02738 RS |
609 | { |
610 | int result = 0; | |
611 | struct acpi_driver *driver; | |
612 | ||
3fb02738 RS |
613 | |
614 | if (!(driver = device->driver)) | |
d550d98d | 615 | return 0; |
3fb02738 | 616 | |
1da177e4 LT |
617 | if (driver->ops.start) { |
618 | result = driver->ops.start(device); | |
619 | if (result && driver->ops.remove) | |
620 | driver->ops.remove(device, ACPI_BUS_REMOVAL_NORMAL); | |
1da177e4 LT |
621 | } |
622 | ||
d550d98d | 623 | return result; |
1da177e4 LT |
624 | } |
625 | ||
9e89dde2 ZR |
626 | /** |
627 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
628 | * @driver: driver being registered | |
629 | * | |
630 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
631 | * devices that match the driver's criteria and binds. Returns zero for | |
632 | * success or a negative error status for failure. | |
633 | */ | |
634 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
1da177e4 | 635 | { |
1890a97a | 636 | int ret; |
1da177e4 | 637 | |
9e89dde2 ZR |
638 | if (acpi_disabled) |
639 | return -ENODEV; | |
1890a97a PM |
640 | driver->drv.name = driver->name; |
641 | driver->drv.bus = &acpi_bus_type; | |
642 | driver->drv.owner = driver->owner; | |
1da177e4 | 643 | |
1890a97a PM |
644 | ret = driver_register(&driver->drv); |
645 | return ret; | |
9e89dde2 | 646 | } |
1da177e4 | 647 | |
9e89dde2 ZR |
648 | EXPORT_SYMBOL(acpi_bus_register_driver); |
649 | ||
650 | /** | |
651 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus | |
652 | * @driver: driver to unregister | |
653 | * | |
654 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
655 | * devices that match the driver's criteria and unbinds. | |
656 | */ | |
657 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
658 | { | |
1890a97a | 659 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
660 | } |
661 | ||
662 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
663 | ||
9e89dde2 ZR |
664 | /* -------------------------------------------------------------------------- |
665 | Device Enumeration | |
666 | -------------------------------------------------------------------------- */ | |
667 | acpi_status | |
668 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
669 | { | |
670 | acpi_status status; | |
671 | acpi_handle tmp; | |
672 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
673 | union acpi_object *obj; | |
674 | ||
675 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
676 | if (ACPI_FAILURE(status)) | |
677 | return status; | |
678 | ||
679 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
680 | if (ACPI_SUCCESS(status)) { | |
681 | obj = buffer.pointer; | |
3b5fee59 HM |
682 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
683 | ejd); | |
9e89dde2 ZR |
684 | kfree(buffer.pointer); |
685 | } | |
686 | return status; | |
687 | } | |
688 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
689 | ||
690 | void acpi_bus_data_handler(acpi_handle handle, u32 function, void *context) | |
691 | { | |
692 | ||
693 | /* TBD */ | |
694 | ||
695 | return; | |
696 | } | |
697 | ||
9e89dde2 ZR |
698 | static int acpi_bus_get_perf_flags(struct acpi_device *device) |
699 | { | |
700 | device->performance.state = ACPI_STATE_UNKNOWN; | |
701 | return 0; | |
702 | } | |
703 | ||
704 | static acpi_status | |
705 | acpi_bus_extract_wakeup_device_power_package(struct acpi_device *device, | |
706 | union acpi_object *package) | |
707 | { | |
708 | int i = 0; | |
709 | union acpi_object *element = NULL; | |
710 | ||
711 | if (!device || !package || (package->package.count < 2)) | |
712 | return AE_BAD_PARAMETER; | |
713 | ||
714 | element = &(package->package.elements[0]); | |
715 | if (!element) | |
716 | return AE_BAD_PARAMETER; | |
717 | if (element->type == ACPI_TYPE_PACKAGE) { | |
718 | if ((element->package.count < 2) || | |
719 | (element->package.elements[0].type != | |
720 | ACPI_TYPE_LOCAL_REFERENCE) | |
721 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) | |
722 | return AE_BAD_DATA; | |
723 | device->wakeup.gpe_device = | |
724 | element->package.elements[0].reference.handle; | |
725 | device->wakeup.gpe_number = | |
726 | (u32) element->package.elements[1].integer.value; | |
727 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
728 | device->wakeup.gpe_number = element->integer.value; | |
729 | } else | |
730 | return AE_BAD_DATA; | |
731 | ||
732 | element = &(package->package.elements[1]); | |
733 | if (element->type != ACPI_TYPE_INTEGER) { | |
734 | return AE_BAD_DATA; | |
735 | } | |
736 | device->wakeup.sleep_state = element->integer.value; | |
737 | ||
738 | if ((package->package.count - 2) > ACPI_MAX_HANDLES) { | |
739 | return AE_NO_MEMORY; | |
740 | } | |
741 | device->wakeup.resources.count = package->package.count - 2; | |
742 | for (i = 0; i < device->wakeup.resources.count; i++) { | |
743 | element = &(package->package.elements[i + 2]); | |
cd0b2248 | 744 | if (element->type != ACPI_TYPE_LOCAL_REFERENCE) |
9e89dde2 | 745 | return AE_BAD_DATA; |
9e89dde2 ZR |
746 | |
747 | device->wakeup.resources.handles[i] = element->reference.handle; | |
1da177e4 | 748 | } |
9e89dde2 ZR |
749 | |
750 | return AE_OK; | |
1da177e4 LT |
751 | } |
752 | ||
9e89dde2 | 753 | static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
1da177e4 | 754 | { |
9e89dde2 ZR |
755 | acpi_status status = 0; |
756 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
757 | union acpi_object *package = NULL; | |
77e76609 | 758 | int psw_error; |
1da177e4 | 759 | |
29b71a1c TR |
760 | struct acpi_device_id button_device_ids[] = { |
761 | {"PNP0C0D", 0}, | |
762 | {"PNP0C0C", 0}, | |
763 | {"PNP0C0E", 0}, | |
764 | {"", 0}, | |
765 | }; | |
766 | ||
9e89dde2 ZR |
767 | /* _PRW */ |
768 | status = acpi_evaluate_object(device->handle, "_PRW", NULL, &buffer); | |
769 | if (ACPI_FAILURE(status)) { | |
770 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
771 | goto end; | |
1da177e4 | 772 | } |
1da177e4 | 773 | |
9e89dde2 ZR |
774 | package = (union acpi_object *)buffer.pointer; |
775 | status = acpi_bus_extract_wakeup_device_power_package(device, package); | |
776 | if (ACPI_FAILURE(status)) { | |
777 | ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package")); | |
778 | goto end; | |
779 | } | |
1da177e4 | 780 | |
9e89dde2 | 781 | kfree(buffer.pointer); |
1da177e4 | 782 | |
9e89dde2 | 783 | device->wakeup.flags.valid = 1; |
9b83ccd2 | 784 | device->wakeup.prepare_count = 0; |
729b2bdb ZY |
785 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
786 | * system for the ACPI device with the _PRW object. | |
787 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. | |
788 | * So it is necessary to call _DSW object first. Only when it is not | |
789 | * present will the _PSW object used. | |
790 | */ | |
77e76609 RW |
791 | psw_error = acpi_device_sleep_wake(device, 0, 0, 0); |
792 | if (psw_error) | |
793 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
794 | "error in _DSW or _PSW evaluation\n")); | |
795 | ||
9e89dde2 | 796 | /* Power button, Lid switch always enable wakeup */ |
29b71a1c | 797 | if (!acpi_match_device_ids(device, button_device_ids)) |
9e89dde2 | 798 | device->wakeup.flags.run_wake = 1; |
1da177e4 | 799 | |
0c526d96 | 800 | end: |
9e89dde2 ZR |
801 | if (ACPI_FAILURE(status)) |
802 | device->flags.wake_capable = 0; | |
d550d98d | 803 | return 0; |
1da177e4 | 804 | } |
1da177e4 | 805 | |
9e89dde2 | 806 | static int acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 807 | { |
9e89dde2 ZR |
808 | acpi_status status = 0; |
809 | acpi_handle handle = NULL; | |
810 | u32 i = 0; | |
1a365616 | 811 | |
4be44fcd | 812 | |
9e89dde2 ZR |
813 | /* |
814 | * Power Management Flags | |
815 | */ | |
816 | status = acpi_get_handle(device->handle, "_PSC", &handle); | |
817 | if (ACPI_SUCCESS(status)) | |
818 | device->power.flags.explicit_get = 1; | |
819 | status = acpi_get_handle(device->handle, "_IRC", &handle); | |
820 | if (ACPI_SUCCESS(status)) | |
821 | device->power.flags.inrush_current = 1; | |
1da177e4 | 822 | |
9e89dde2 ZR |
823 | /* |
824 | * Enumerate supported power management states | |
825 | */ | |
826 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3; i++) { | |
827 | struct acpi_device_power_state *ps = &device->power.states[i]; | |
828 | char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' }; | |
1da177e4 | 829 | |
9e89dde2 ZR |
830 | /* Evaluate "_PRx" to se if power resources are referenced */ |
831 | acpi_evaluate_reference(device->handle, object_name, NULL, | |
832 | &ps->resources); | |
833 | if (ps->resources.count) { | |
834 | device->power.flags.power_resources = 1; | |
835 | ps->flags.valid = 1; | |
1da177e4 | 836 | } |
1da177e4 | 837 | |
9e89dde2 ZR |
838 | /* Evaluate "_PSx" to see if we can do explicit sets */ |
839 | object_name[2] = 'S'; | |
840 | status = acpi_get_handle(device->handle, object_name, &handle); | |
841 | if (ACPI_SUCCESS(status)) { | |
842 | ps->flags.explicit_set = 1; | |
843 | ps->flags.valid = 1; | |
1da177e4 | 844 | } |
1da177e4 | 845 | |
9e89dde2 ZR |
846 | /* State is valid if we have some power control */ |
847 | if (ps->resources.count || ps->flags.explicit_set) | |
848 | ps->flags.valid = 1; | |
1da177e4 | 849 | |
9e89dde2 ZR |
850 | ps->power = -1; /* Unknown - driver assigned */ |
851 | ps->latency = -1; /* Unknown - driver assigned */ | |
852 | } | |
1da177e4 | 853 | |
9e89dde2 ZR |
854 | /* Set defaults for D0 and D3 states (always valid) */ |
855 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
856 | device->power.states[ACPI_STATE_D0].power = 100; | |
857 | device->power.states[ACPI_STATE_D3].flags.valid = 1; | |
858 | device->power.states[ACPI_STATE_D3].power = 0; | |
c8f7a62c | 859 | |
9e89dde2 | 860 | /* TBD: System wake support and resource requirements. */ |
c8f7a62c | 861 | |
9e89dde2 | 862 | device->power.state = ACPI_STATE_UNKNOWN; |
a51e145f | 863 | acpi_bus_get_power(device->handle, &(device->power.state)); |
c8f7a62c | 864 | |
9e89dde2 ZR |
865 | return 0; |
866 | } | |
c8f7a62c | 867 | |
4be44fcd | 868 | static int acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 869 | { |
4be44fcd LB |
870 | acpi_status status = AE_OK; |
871 | acpi_handle temp = NULL; | |
1da177e4 | 872 | |
1da177e4 LT |
873 | |
874 | /* Presence of _STA indicates 'dynamic_status' */ | |
875 | status = acpi_get_handle(device->handle, "_STA", &temp); | |
876 | if (ACPI_SUCCESS(status)) | |
877 | device->flags.dynamic_status = 1; | |
878 | ||
879 | /* Presence of _CID indicates 'compatible_ids' */ | |
880 | status = acpi_get_handle(device->handle, "_CID", &temp); | |
881 | if (ACPI_SUCCESS(status)) | |
882 | device->flags.compatible_ids = 1; | |
883 | ||
884 | /* Presence of _RMV indicates 'removable' */ | |
885 | status = acpi_get_handle(device->handle, "_RMV", &temp); | |
886 | if (ACPI_SUCCESS(status)) | |
887 | device->flags.removable = 1; | |
888 | ||
889 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
890 | status = acpi_get_handle(device->handle, "_EJD", &temp); | |
891 | if (ACPI_SUCCESS(status)) | |
892 | device->flags.ejectable = 1; | |
893 | else { | |
894 | status = acpi_get_handle(device->handle, "_EJ0", &temp); | |
895 | if (ACPI_SUCCESS(status)) | |
896 | device->flags.ejectable = 1; | |
897 | } | |
898 | ||
899 | /* Presence of _LCK indicates 'lockable' */ | |
900 | status = acpi_get_handle(device->handle, "_LCK", &temp); | |
901 | if (ACPI_SUCCESS(status)) | |
902 | device->flags.lockable = 1; | |
903 | ||
904 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ | |
905 | status = acpi_get_handle(device->handle, "_PS0", &temp); | |
906 | if (ACPI_FAILURE(status)) | |
907 | status = acpi_get_handle(device->handle, "_PR0", &temp); | |
908 | if (ACPI_SUCCESS(status)) | |
909 | device->flags.power_manageable = 1; | |
910 | ||
911 | /* Presence of _PRW indicates wake capable */ | |
912 | status = acpi_get_handle(device->handle, "_PRW", &temp); | |
913 | if (ACPI_SUCCESS(status)) | |
914 | device->flags.wake_capable = 1; | |
915 | ||
3c5f9be4 | 916 | /* TBD: Performance management */ |
1da177e4 | 917 | |
d550d98d | 918 | return 0; |
1da177e4 LT |
919 | } |
920 | ||
4be44fcd LB |
921 | static void acpi_device_get_busid(struct acpi_device *device, |
922 | acpi_handle handle, int type) | |
1da177e4 | 923 | { |
4be44fcd LB |
924 | char bus_id[5] = { '?', 0 }; |
925 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
926 | int i = 0; | |
1da177e4 LT |
927 | |
928 | /* | |
929 | * Bus ID | |
930 | * ------ | |
931 | * The device's Bus ID is simply the object name. | |
932 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
933 | */ | |
934 | switch (type) { | |
935 | case ACPI_BUS_TYPE_SYSTEM: | |
936 | strcpy(device->pnp.bus_id, "ACPI"); | |
937 | break; | |
938 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
939 | strcpy(device->pnp.bus_id, "PWRF"); | |
940 | break; | |
941 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
942 | strcpy(device->pnp.bus_id, "SLPF"); | |
943 | break; | |
944 | default: | |
945 | acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer); | |
946 | /* Clean up trailing underscores (if any) */ | |
947 | for (i = 3; i > 1; i--) { | |
948 | if (bus_id[i] == '_') | |
949 | bus_id[i] = '\0'; | |
950 | else | |
951 | break; | |
952 | } | |
953 | strcpy(device->pnp.bus_id, bus_id); | |
954 | break; | |
955 | } | |
956 | } | |
957 | ||
54735266 ZR |
958 | /* |
959 | * acpi_bay_match - see if a device is an ejectable driver bay | |
960 | * | |
961 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
962 | * then we can safely call it an ejectable drive bay | |
963 | */ | |
964 | static int acpi_bay_match(struct acpi_device *device){ | |
965 | acpi_status status; | |
966 | acpi_handle handle; | |
967 | acpi_handle tmp; | |
968 | acpi_handle phandle; | |
969 | ||
970 | handle = device->handle; | |
971 | ||
972 | status = acpi_get_handle(handle, "_EJ0", &tmp); | |
973 | if (ACPI_FAILURE(status)) | |
974 | return -ENODEV; | |
975 | ||
976 | if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || | |
977 | (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || | |
978 | (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || | |
979 | (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) | |
980 | return 0; | |
981 | ||
982 | if (acpi_get_parent(handle, &phandle)) | |
983 | return -ENODEV; | |
984 | ||
985 | if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) || | |
986 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) || | |
987 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) || | |
988 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp)))) | |
989 | return 0; | |
990 | ||
991 | return -ENODEV; | |
992 | } | |
993 | ||
3620f2f2 FS |
994 | /* |
995 | * acpi_dock_match - see if a device has a _DCK method | |
996 | */ | |
997 | static int acpi_dock_match(struct acpi_device *device) | |
998 | { | |
999 | acpi_handle tmp; | |
1000 | return acpi_get_handle(device->handle, "_DCK", &tmp); | |
1001 | } | |
1002 | ||
4be44fcd LB |
1003 | static void acpi_device_set_id(struct acpi_device *device, |
1004 | struct acpi_device *parent, acpi_handle handle, | |
1005 | int type) | |
1da177e4 | 1006 | { |
4be44fcd LB |
1007 | struct acpi_device_info *info; |
1008 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
1009 | char *hid = NULL; | |
1010 | char *uid = NULL; | |
1da177e4 | 1011 | struct acpi_compatible_id_list *cid_list = NULL; |
3620f2f2 | 1012 | const char *cid_add = NULL; |
4be44fcd | 1013 | acpi_status status; |
1da177e4 LT |
1014 | |
1015 | switch (type) { | |
1016 | case ACPI_BUS_TYPE_DEVICE: | |
1017 | status = acpi_get_object_info(handle, &buffer); | |
1018 | if (ACPI_FAILURE(status)) { | |
96b2dd1f | 1019 | printk(KERN_ERR PREFIX "%s: Error reading device info\n", __func__); |
1da177e4 LT |
1020 | return; |
1021 | } | |
1022 | ||
1023 | info = buffer.pointer; | |
1024 | if (info->valid & ACPI_VALID_HID) | |
1025 | hid = info->hardware_id.value; | |
1026 | if (info->valid & ACPI_VALID_UID) | |
1027 | uid = info->unique_id.value; | |
1028 | if (info->valid & ACPI_VALID_CID) | |
1029 | cid_list = &info->compatibility_id; | |
1030 | if (info->valid & ACPI_VALID_ADR) { | |
1031 | device->pnp.bus_address = info->address; | |
1032 | device->flags.bus_address = 1; | |
1033 | } | |
ae843332 | 1034 | |
3620f2f2 FS |
1035 | /* If we have a video/bay/dock device, add our selfdefined |
1036 | HID to the CID list. Like that the video/bay/dock drivers | |
1037 | will get autoloaded and the device might still match | |
1038 | against another driver. | |
1039 | */ | |
c3d6de69 | 1040 | if (acpi_is_video_device(device)) |
3620f2f2 FS |
1041 | cid_add = ACPI_VIDEO_HID; |
1042 | else if (ACPI_SUCCESS(acpi_bay_match(device))) | |
1043 | cid_add = ACPI_BAY_HID; | |
1044 | else if (ACPI_SUCCESS(acpi_dock_match(device))) | |
1045 | cid_add = ACPI_DOCK_HID; | |
54735266 | 1046 | |
1da177e4 LT |
1047 | break; |
1048 | case ACPI_BUS_TYPE_POWER: | |
1049 | hid = ACPI_POWER_HID; | |
1050 | break; | |
1051 | case ACPI_BUS_TYPE_PROCESSOR: | |
ad93a765 | 1052 | hid = ACPI_PROCESSOR_OBJECT_HID; |
1da177e4 LT |
1053 | break; |
1054 | case ACPI_BUS_TYPE_SYSTEM: | |
1055 | hid = ACPI_SYSTEM_HID; | |
1056 | break; | |
1057 | case ACPI_BUS_TYPE_THERMAL: | |
1058 | hid = ACPI_THERMAL_HID; | |
1059 | break; | |
1060 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
1061 | hid = ACPI_BUTTON_HID_POWERF; | |
1062 | break; | |
1063 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
1064 | hid = ACPI_BUTTON_HID_SLEEPF; | |
1065 | break; | |
1066 | } | |
1067 | ||
0c526d96 | 1068 | /* |
1da177e4 LT |
1069 | * \_SB |
1070 | * ---- | |
1071 | * Fix for the system root bus device -- the only root-level device. | |
1072 | */ | |
c51a4de8 | 1073 | if (((acpi_handle)parent == ACPI_ROOT_OBJECT) && (type == ACPI_BUS_TYPE_DEVICE)) { |
1da177e4 LT |
1074 | hid = ACPI_BUS_HID; |
1075 | strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME); | |
1076 | strcpy(device->pnp.device_class, ACPI_BUS_CLASS); | |
1077 | } | |
1078 | ||
1079 | if (hid) { | |
1080 | strcpy(device->pnp.hardware_id, hid); | |
1081 | device->flags.hardware_id = 1; | |
1082 | } | |
1083 | if (uid) { | |
1084 | strcpy(device->pnp.unique_id, uid); | |
1085 | device->flags.unique_id = 1; | |
1086 | } | |
3620f2f2 FS |
1087 | if (cid_list || cid_add) { |
1088 | struct acpi_compatible_id_list *list; | |
1089 | int size = 0; | |
1090 | int count = 0; | |
1091 | ||
1092 | if (cid_list) { | |
1093 | size = cid_list->size; | |
1094 | } else if (cid_add) { | |
1095 | size = sizeof(struct acpi_compatible_id_list); | |
1096 | cid_list = ACPI_ALLOCATE_ZEROED((acpi_size) size); | |
1097 | if (!cid_list) { | |
1098 | printk(KERN_ERR "Memory allocation error\n"); | |
1099 | kfree(buffer.pointer); | |
1100 | return; | |
1101 | } else { | |
1102 | cid_list->count = 0; | |
1103 | cid_list->size = size; | |
1104 | } | |
1105 | } | |
1106 | if (cid_add) | |
1107 | size += sizeof(struct acpi_compatible_id); | |
1108 | list = kmalloc(size, GFP_KERNEL); | |
1109 | ||
1110 | if (list) { | |
1111 | if (cid_list) { | |
1112 | memcpy(list, cid_list, cid_list->size); | |
1113 | count = cid_list->count; | |
1114 | } | |
1115 | if (cid_add) { | |
1116 | strncpy(list->id[count].value, cid_add, | |
1117 | ACPI_MAX_CID_LENGTH); | |
1118 | count++; | |
1119 | device->flags.compatible_ids = 1; | |
1120 | } | |
1121 | list->size = size; | |
1122 | list->count = count; | |
1123 | device->pnp.cid_list = list; | |
1124 | } else | |
87ecd5cd | 1125 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
1da177e4 LT |
1126 | } |
1127 | ||
02438d87 | 1128 | kfree(buffer.pointer); |
1da177e4 LT |
1129 | } |
1130 | ||
4be44fcd | 1131 | static int acpi_device_set_context(struct acpi_device *device, int type) |
1da177e4 LT |
1132 | { |
1133 | acpi_status status = AE_OK; | |
1134 | int result = 0; | |
1135 | /* | |
1136 | * Context | |
1137 | * ------- | |
1138 | * Attach this 'struct acpi_device' to the ACPI object. This makes | |
1139 | * resolutions from handle->device very efficient. Note that we need | |
1140 | * to be careful with fixed-feature devices as they all attach to the | |
1141 | * root object. | |
1142 | */ | |
4be44fcd | 1143 | if (type != ACPI_BUS_TYPE_POWER_BUTTON && |
1da177e4 LT |
1144 | type != ACPI_BUS_TYPE_SLEEP_BUTTON) { |
1145 | status = acpi_attach_data(device->handle, | |
4be44fcd | 1146 | acpi_bus_data_handler, device); |
1da177e4 LT |
1147 | |
1148 | if (ACPI_FAILURE(status)) { | |
87ecd5cd | 1149 | printk(KERN_ERR PREFIX "Error attaching device data\n"); |
1da177e4 LT |
1150 | result = -ENODEV; |
1151 | } | |
1152 | } | |
1153 | return result; | |
1154 | } | |
1155 | ||
4be44fcd | 1156 | static int acpi_bus_remove(struct acpi_device *dev, int rmdevice) |
1da177e4 | 1157 | { |
1da177e4 | 1158 | if (!dev) |
d550d98d | 1159 | return -EINVAL; |
1da177e4 | 1160 | |
96333578 | 1161 | dev->removal_type = ACPI_BUS_REMOVAL_EJECT; |
1890a97a | 1162 | device_release_driver(&dev->dev); |
1da177e4 LT |
1163 | |
1164 | if (!rmdevice) | |
d550d98d | 1165 | return 0; |
1da177e4 | 1166 | |
2786f6e3 RZ |
1167 | /* |
1168 | * unbind _ADR-Based Devices when hot removal | |
1169 | */ | |
1da177e4 LT |
1170 | if (dev->flags.bus_address) { |
1171 | if ((dev->parent) && (dev->parent->ops.unbind)) | |
1172 | dev->parent->ops.unbind(dev); | |
1173 | } | |
1da177e4 LT |
1174 | acpi_device_unregister(dev, ACPI_BUS_REMOVAL_EJECT); |
1175 | ||
d550d98d | 1176 | return 0; |
1da177e4 LT |
1177 | } |
1178 | ||
3fb02738 | 1179 | static int |
4be44fcd | 1180 | acpi_add_single_object(struct acpi_device **child, |
c4168bff LS |
1181 | struct acpi_device *parent, acpi_handle handle, int type, |
1182 | struct acpi_bus_ops *ops) | |
1da177e4 | 1183 | { |
4be44fcd LB |
1184 | int result = 0; |
1185 | struct acpi_device *device = NULL; | |
1da177e4 | 1186 | |
1da177e4 LT |
1187 | |
1188 | if (!child) | |
d550d98d | 1189 | return -EINVAL; |
1da177e4 | 1190 | |
36bcbec7 | 1191 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 1192 | if (!device) { |
6468463a | 1193 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 1194 | return -ENOMEM; |
1da177e4 | 1195 | } |
1da177e4 LT |
1196 | |
1197 | device->handle = handle; | |
1198 | device->parent = parent; | |
c4168bff LS |
1199 | device->bus_ops = *ops; /* workround for not call .start */ |
1200 | ||
1da177e4 | 1201 | |
4be44fcd | 1202 | acpi_device_get_busid(device, handle, type); |
1da177e4 LT |
1203 | |
1204 | /* | |
1205 | * Flags | |
1206 | * ----- | |
1207 | * Get prior to calling acpi_bus_get_status() so we know whether | |
1208 | * or not _STA is present. Note that we only look for object | |
1209 | * handles -- cannot evaluate objects until we know the device is | |
1210 | * present and properly initialized. | |
1211 | */ | |
1212 | result = acpi_bus_get_flags(device); | |
1213 | if (result) | |
1214 | goto end; | |
1215 | ||
1216 | /* | |
1217 | * Status | |
1218 | * ------ | |
6940faba KT |
1219 | * See if the device is present. We always assume that non-Device |
1220 | * and non-Processor objects (e.g. thermal zones, power resources, | |
1221 | * etc.) are present, functioning, etc. (at least when parent object | |
1222 | * is present). Note that _STA has a different meaning for some | |
1223 | * objects (e.g. power resources) so we need to be careful how we use | |
1224 | * it. | |
1da177e4 LT |
1225 | */ |
1226 | switch (type) { | |
6940faba | 1227 | case ACPI_BUS_TYPE_PROCESSOR: |
1da177e4 LT |
1228 | case ACPI_BUS_TYPE_DEVICE: |
1229 | result = acpi_bus_get_status(device); | |
3620f2f2 FS |
1230 | if (ACPI_FAILURE(result)) { |
1231 | result = -ENODEV; | |
1da177e4 LT |
1232 | goto end; |
1233 | } | |
39a0ad87 ZY |
1234 | /* |
1235 | * When the device is neither present nor functional, the | |
1236 | * device should not be added to Linux ACPI device tree. | |
1237 | * When the status of the device is not present but functinal, | |
1238 | * it should be added to Linux ACPI tree. For example : bay | |
1239 | * device , dock device. | |
1240 | * In such conditions it is unncessary to check whether it is | |
1241 | * bay device or dock device. | |
1242 | */ | |
1243 | if (!device->status.present && !device->status.functional) { | |
1244 | result = -ENODEV; | |
1245 | goto end; | |
3620f2f2 | 1246 | } |
1da177e4 LT |
1247 | break; |
1248 | default: | |
0c0e8921 BH |
1249 | STRUCT_TO_INT(device->status) = |
1250 | ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | | |
1251 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; | |
1da177e4 LT |
1252 | break; |
1253 | } | |
1254 | ||
1255 | /* | |
1256 | * Initialize Device | |
1257 | * ----------------- | |
1258 | * TBD: Synch with Core's enumeration/initialization process. | |
1259 | */ | |
1260 | ||
1261 | /* | |
1262 | * Hardware ID, Unique ID, & Bus Address | |
1263 | * ------------------------------------- | |
1264 | */ | |
4be44fcd | 1265 | acpi_device_set_id(device, parent, handle, type); |
1da177e4 | 1266 | |
eab4b645 ZY |
1267 | /* |
1268 | * The ACPI device is attached to acpi handle before getting | |
1269 | * the power/wakeup/peformance flags. Otherwise OS can't get | |
1270 | * the corresponding ACPI device by the acpi handle in the course | |
1271 | * of getting the power/wakeup/performance flags. | |
1272 | */ | |
1273 | result = acpi_device_set_context(device, type); | |
1274 | if (result) | |
1275 | goto end; | |
1276 | ||
1da177e4 LT |
1277 | /* |
1278 | * Power Management | |
1279 | * ---------------- | |
1280 | */ | |
1281 | if (device->flags.power_manageable) { | |
1282 | result = acpi_bus_get_power_flags(device); | |
1283 | if (result) | |
1284 | goto end; | |
1285 | } | |
1286 | ||
4be44fcd | 1287 | /* |
1da177e4 LT |
1288 | * Wakeup device management |
1289 | *----------------------- | |
1290 | */ | |
1291 | if (device->flags.wake_capable) { | |
1292 | result = acpi_bus_get_wakeup_device_flags(device); | |
1293 | if (result) | |
1294 | goto end; | |
1295 | } | |
1296 | ||
1297 | /* | |
1298 | * Performance Management | |
1299 | * ---------------------- | |
1300 | */ | |
1301 | if (device->flags.performance_manageable) { | |
1302 | result = acpi_bus_get_perf_flags(device); | |
1303 | if (result) | |
1304 | goto end; | |
1305 | } | |
1306 | ||
1da177e4 | 1307 | |
e49bd2dd | 1308 | result = acpi_device_register(device, parent); |
1da177e4 LT |
1309 | |
1310 | /* | |
2786f6e3 | 1311 | * Bind _ADR-Based Devices when hot add |
1da177e4 LT |
1312 | */ |
1313 | if (device->flags.bus_address) { | |
1314 | if (device->parent && device->parent->ops.bind) | |
1315 | device->parent->ops.bind(device); | |
1316 | } | |
1317 | ||
0c526d96 | 1318 | end: |
1da177e4 LT |
1319 | if (!result) |
1320 | *child = device; | |
1321 | else { | |
6044ec88 | 1322 | kfree(device->pnp.cid_list); |
1da177e4 LT |
1323 | kfree(device); |
1324 | } | |
1325 | ||
d550d98d | 1326 | return result; |
1da177e4 | 1327 | } |
1da177e4 | 1328 | |
4be44fcd | 1329 | static int acpi_bus_scan(struct acpi_device *start, struct acpi_bus_ops *ops) |
1da177e4 | 1330 | { |
4be44fcd LB |
1331 | acpi_status status = AE_OK; |
1332 | struct acpi_device *parent = NULL; | |
1333 | struct acpi_device *child = NULL; | |
1334 | acpi_handle phandle = NULL; | |
1335 | acpi_handle chandle = NULL; | |
1336 | acpi_object_type type = 0; | |
1337 | u32 level = 1; | |
1da177e4 | 1338 | |
1da177e4 LT |
1339 | |
1340 | if (!start) | |
d550d98d | 1341 | return -EINVAL; |
1da177e4 LT |
1342 | |
1343 | parent = start; | |
1344 | phandle = start->handle; | |
4be44fcd | 1345 | |
1da177e4 LT |
1346 | /* |
1347 | * Parse through the ACPI namespace, identify all 'devices', and | |
1348 | * create a new 'struct acpi_device' for each. | |
1349 | */ | |
1350 | while ((level > 0) && parent) { | |
1351 | ||
1352 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, | |
4be44fcd | 1353 | chandle, &chandle); |
1da177e4 LT |
1354 | |
1355 | /* | |
1356 | * If this scope is exhausted then move our way back up. | |
1357 | */ | |
1358 | if (ACPI_FAILURE(status)) { | |
1359 | level--; | |
1360 | chandle = phandle; | |
1361 | acpi_get_parent(phandle, &phandle); | |
1362 | if (parent->parent) | |
1363 | parent = parent->parent; | |
1364 | continue; | |
1365 | } | |
1366 | ||
1367 | status = acpi_get_type(chandle, &type); | |
1368 | if (ACPI_FAILURE(status)) | |
1369 | continue; | |
1370 | ||
1371 | /* | |
1372 | * If this is a scope object then parse it (depth-first). | |
1373 | */ | |
1374 | if (type == ACPI_TYPE_LOCAL_SCOPE) { | |
1375 | level++; | |
1376 | phandle = chandle; | |
1377 | chandle = NULL; | |
1378 | continue; | |
1379 | } | |
1380 | ||
1381 | /* | |
1382 | * We're only interested in objects that we consider 'devices'. | |
1383 | */ | |
1384 | switch (type) { | |
1385 | case ACPI_TYPE_DEVICE: | |
1386 | type = ACPI_BUS_TYPE_DEVICE; | |
1387 | break; | |
1388 | case ACPI_TYPE_PROCESSOR: | |
1389 | type = ACPI_BUS_TYPE_PROCESSOR; | |
1390 | break; | |
1391 | case ACPI_TYPE_THERMAL: | |
1392 | type = ACPI_BUS_TYPE_THERMAL; | |
1393 | break; | |
1394 | case ACPI_TYPE_POWER: | |
1395 | type = ACPI_BUS_TYPE_POWER; | |
1396 | break; | |
1397 | default: | |
1398 | continue; | |
1399 | } | |
1400 | ||
3fb02738 RS |
1401 | if (ops->acpi_op_add) |
1402 | status = acpi_add_single_object(&child, parent, | |
c4168bff | 1403 | chandle, type, ops); |
4be44fcd | 1404 | else |
3fb02738 RS |
1405 | status = acpi_bus_get_device(chandle, &child); |
1406 | ||
4be44fcd LB |
1407 | if (ACPI_FAILURE(status)) |
1408 | continue; | |
3fb02738 | 1409 | |
c4168bff | 1410 | if (ops->acpi_op_start && !(ops->acpi_op_add)) { |
3fb02738 RS |
1411 | status = acpi_start_single_object(child); |
1412 | if (ACPI_FAILURE(status)) | |
1413 | continue; | |
1414 | } | |
1da177e4 LT |
1415 | |
1416 | /* | |
1417 | * If the device is present, enabled, and functioning then | |
1418 | * parse its scope (depth-first). Note that we need to | |
1419 | * represent absent devices to facilitate PnP notifications | |
1420 | * -- but only the subtree head (not all of its children, | |
1421 | * which will be enumerated when the parent is inserted). | |
1422 | * | |
1423 | * TBD: Need notifications and other detection mechanisms | |
4be44fcd | 1424 | * in place before we can fully implement this. |
1da177e4 | 1425 | */ |
39a0ad87 ZY |
1426 | /* |
1427 | * When the device is not present but functional, it is also | |
1428 | * necessary to scan the children of this device. | |
1429 | */ | |
1430 | if (child->status.present || (!child->status.present && | |
1431 | child->status.functional)) { | |
1da177e4 LT |
1432 | status = acpi_get_next_object(ACPI_TYPE_ANY, chandle, |
1433 | NULL, NULL); | |
1434 | if (ACPI_SUCCESS(status)) { | |
1435 | level++; | |
1436 | phandle = chandle; | |
1437 | chandle = NULL; | |
1438 | parent = child; | |
1439 | } | |
1440 | } | |
1441 | } | |
1442 | ||
d550d98d | 1443 | return 0; |
1da177e4 | 1444 | } |
1da177e4 | 1445 | |
3fb02738 | 1446 | int |
4be44fcd LB |
1447 | acpi_bus_add(struct acpi_device **child, |
1448 | struct acpi_device *parent, acpi_handle handle, int type) | |
3fb02738 RS |
1449 | { |
1450 | int result; | |
1451 | struct acpi_bus_ops ops; | |
1452 | ||
c4168bff LS |
1453 | memset(&ops, 0, sizeof(ops)); |
1454 | ops.acpi_op_add = 1; | |
3fb02738 | 1455 | |
c4168bff LS |
1456 | result = acpi_add_single_object(child, parent, handle, type, &ops); |
1457 | if (!result) | |
3fb02738 | 1458 | result = acpi_bus_scan(*child, &ops); |
c4168bff | 1459 | |
d550d98d | 1460 | return result; |
3fb02738 RS |
1461 | } |
1462 | EXPORT_SYMBOL(acpi_bus_add); | |
1463 | ||
4be44fcd | 1464 | int acpi_bus_start(struct acpi_device *device) |
3fb02738 RS |
1465 | { |
1466 | int result; | |
1467 | struct acpi_bus_ops ops; | |
1468 | ||
3fb02738 RS |
1469 | |
1470 | if (!device) | |
d550d98d | 1471 | return -EINVAL; |
3fb02738 RS |
1472 | |
1473 | result = acpi_start_single_object(device); | |
1474 | if (!result) { | |
1475 | memset(&ops, 0, sizeof(ops)); | |
1476 | ops.acpi_op_start = 1; | |
1477 | result = acpi_bus_scan(device, &ops); | |
1478 | } | |
d550d98d | 1479 | return result; |
3fb02738 RS |
1480 | } |
1481 | EXPORT_SYMBOL(acpi_bus_start); | |
1da177e4 | 1482 | |
ceaba663 | 1483 | int acpi_bus_trim(struct acpi_device *start, int rmdevice) |
1da177e4 | 1484 | { |
4be44fcd LB |
1485 | acpi_status status; |
1486 | struct acpi_device *parent, *child; | |
1487 | acpi_handle phandle, chandle; | |
1488 | acpi_object_type type; | |
1489 | u32 level = 1; | |
1490 | int err = 0; | |
1491 | ||
1492 | parent = start; | |
1da177e4 LT |
1493 | phandle = start->handle; |
1494 | child = chandle = NULL; | |
1495 | ||
1496 | while ((level > 0) && parent && (!err)) { | |
1497 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, | |
4be44fcd | 1498 | chandle, &chandle); |
1da177e4 LT |
1499 | |
1500 | /* | |
1501 | * If this scope is exhausted then move our way back up. | |
1502 | */ | |
1503 | if (ACPI_FAILURE(status)) { | |
1504 | level--; | |
1505 | chandle = phandle; | |
1506 | acpi_get_parent(phandle, &phandle); | |
1507 | child = parent; | |
1508 | parent = parent->parent; | |
1509 | ||
1510 | if (level == 0) | |
1511 | err = acpi_bus_remove(child, rmdevice); | |
1512 | else | |
1513 | err = acpi_bus_remove(child, 1); | |
1514 | ||
1515 | continue; | |
1516 | } | |
1517 | ||
1518 | status = acpi_get_type(chandle, &type); | |
1519 | if (ACPI_FAILURE(status)) { | |
1520 | continue; | |
1521 | } | |
1522 | /* | |
1523 | * If there is a device corresponding to chandle then | |
1524 | * parse it (depth-first). | |
1525 | */ | |
1526 | if (acpi_bus_get_device(chandle, &child) == 0) { | |
1527 | level++; | |
1528 | phandle = chandle; | |
1529 | chandle = NULL; | |
1530 | parent = child; | |
1531 | } | |
1532 | continue; | |
1533 | } | |
1534 | return err; | |
1535 | } | |
ceaba663 KA |
1536 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
1537 | ||
4be44fcd | 1538 | static int acpi_bus_scan_fixed(struct acpi_device *root) |
1da177e4 | 1539 | { |
4be44fcd LB |
1540 | int result = 0; |
1541 | struct acpi_device *device = NULL; | |
c4168bff | 1542 | struct acpi_bus_ops ops; |
1da177e4 LT |
1543 | |
1544 | if (!root) | |
d550d98d | 1545 | return -ENODEV; |
1da177e4 | 1546 | |
c4168bff LS |
1547 | memset(&ops, 0, sizeof(ops)); |
1548 | ops.acpi_op_add = 1; | |
1549 | ops.acpi_op_start = 1; | |
1550 | ||
1da177e4 LT |
1551 | /* |
1552 | * Enumerate all fixed-feature devices. | |
1553 | */ | |
cee324b1 | 1554 | if ((acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON) == 0) { |
3fb02738 | 1555 | result = acpi_add_single_object(&device, acpi_root, |
4be44fcd | 1556 | NULL, |
c4168bff LS |
1557 | ACPI_BUS_TYPE_POWER_BUTTON, |
1558 | &ops); | |
3fb02738 | 1559 | } |
1da177e4 | 1560 | |
cee324b1 | 1561 | if ((acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON) == 0) { |
3fb02738 | 1562 | result = acpi_add_single_object(&device, acpi_root, |
4be44fcd | 1563 | NULL, |
c4168bff LS |
1564 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
1565 | &ops); | |
3fb02738 | 1566 | } |
1da177e4 | 1567 | |
d550d98d | 1568 | return result; |
1da177e4 LT |
1569 | } |
1570 | ||
e747f274 | 1571 | int __init acpi_scan_init(void) |
1da177e4 LT |
1572 | { |
1573 | int result; | |
3fb02738 | 1574 | struct acpi_bus_ops ops; |
1da177e4 | 1575 | |
c4168bff LS |
1576 | memset(&ops, 0, sizeof(ops)); |
1577 | ops.acpi_op_add = 1; | |
1578 | ops.acpi_op_start = 1; | |
1da177e4 | 1579 | |
5b327265 PM |
1580 | result = bus_register(&acpi_bus_type); |
1581 | if (result) { | |
1582 | /* We don't want to quit even if we failed to add suspend/resume */ | |
1583 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
1584 | } | |
1585 | ||
1da177e4 LT |
1586 | /* |
1587 | * Create the root device in the bus's device tree | |
1588 | */ | |
3fb02738 | 1589 | result = acpi_add_single_object(&acpi_root, NULL, ACPI_ROOT_OBJECT, |
c4168bff | 1590 | ACPI_BUS_TYPE_SYSTEM, &ops); |
1da177e4 LT |
1591 | if (result) |
1592 | goto Done; | |
1593 | ||
1594 | /* | |
1595 | * Enumerate devices in the ACPI namespace. | |
1596 | */ | |
1597 | result = acpi_bus_scan_fixed(acpi_root); | |
c04209a7 | 1598 | |
c4168bff | 1599 | if (!result) |
3fb02738 | 1600 | result = acpi_bus_scan(acpi_root, &ops); |
1da177e4 LT |
1601 | |
1602 | if (result) | |
1603 | acpi_device_unregister(acpi_root, ACPI_BUS_REMOVAL_NORMAL); | |
1604 | ||
0c526d96 | 1605 | Done: |
d550d98d | 1606 | return result; |
1da177e4 | 1607 | } |