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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 ZR |
196 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
197 | if(result) | |
198 | goto end; | |
1da177e4 | 199 | |
e49bd2dd ZR |
200 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
201 | kfree(path.pointer); | |
202 | end: | |
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 | */ |
e49bd2dd ZR |
216 | if(dev->handle) { |
217 | result = device_create_file(&dev->dev, &dev_attr_path); | |
218 | if(result) | |
219 | goto end; | |
1da177e4 LT |
220 | } |
221 | ||
e49bd2dd ZR |
222 | if(dev->flags.hardware_id) { |
223 | result = device_create_file(&dev->dev, &dev_attr_hid); | |
224 | if(result) | |
225 | goto end; | |
226 | } | |
1da177e4 | 227 | |
29b71a1c TR |
228 | if (dev->flags.hardware_id || dev->flags.compatible_ids){ |
229 | result = device_create_file(&dev->dev, &dev_attr_modalias); | |
230 | if(result) | |
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 ZR |
240 | result = device_create_file(&dev->dev, &dev_attr_eject); |
241 | end: | |
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 | ||
e49bd2dd ZR |
261 | if(dev->flags.hardware_id) |
262 | device_remove_file(&dev->dev, &dev_attr_hid); | |
263 | if(dev->handle) | |
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 | } |
e49bd2dd ZR |
511 | if(!found) { |
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; | |
529 | device_initialize(&device->dev); | |
1890a97a | 530 | device->dev.release = &acpi_device_release; |
e49bd2dd ZR |
531 | result = device_add(&device->dev); |
532 | if(result) { | |
fc3a8828 | 533 | dev_err(&device->dev, "Error adding device\n"); |
e49bd2dd | 534 | goto end; |
1da177e4 | 535 | } |
1da177e4 | 536 | |
e49bd2dd ZR |
537 | result = acpi_device_setup_files(device); |
538 | if(result) | |
0794469d KS |
539 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
540 | dev_name(&device->dev)); | |
1da177e4 | 541 | |
96333578 | 542 | device->removal_type = ACPI_BUS_REMOVAL_NORMAL; |
1da177e4 | 543 | return 0; |
e49bd2dd | 544 | end: |
9090589d | 545 | mutex_lock(&acpi_device_lock); |
33b57150 | 546 | if (device->parent) |
e49bd2dd | 547 | list_del(&device->node); |
e49bd2dd | 548 | list_del(&device->wakeup_list); |
9090589d | 549 | mutex_unlock(&acpi_device_lock); |
e49bd2dd | 550 | return result; |
1da177e4 LT |
551 | } |
552 | ||
9e89dde2 ZR |
553 | static void acpi_device_unregister(struct acpi_device *device, int type) |
554 | { | |
9090589d | 555 | mutex_lock(&acpi_device_lock); |
33b57150 | 556 | if (device->parent) |
9e89dde2 | 557 | list_del(&device->node); |
1da177e4 | 558 | |
9e89dde2 | 559 | list_del(&device->wakeup_list); |
9090589d | 560 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 561 | |
9e89dde2 | 562 | acpi_detach_data(device->handle, acpi_bus_data_handler); |
1890a97a | 563 | |
f883d9db | 564 | acpi_device_remove_files(device); |
1890a97a | 565 | device_unregister(&device->dev); |
1da177e4 LT |
566 | } |
567 | ||
9e89dde2 ZR |
568 | /* -------------------------------------------------------------------------- |
569 | Driver Management | |
570 | -------------------------------------------------------------------------- */ | |
1da177e4 | 571 | /** |
d758a8fa RD |
572 | * acpi_bus_driver_init - add a device to a driver |
573 | * @device: the device to add and initialize | |
574 | * @driver: driver for the device | |
575 | * | |
1da177e4 | 576 | * Used to initialize a device via its device driver. Called whenever a |
1890a97a | 577 | * driver is bound to a device. Invokes the driver's add() ops. |
1da177e4 LT |
578 | */ |
579 | static int | |
4be44fcd | 580 | acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) |
1da177e4 | 581 | { |
4be44fcd | 582 | int result = 0; |
1da177e4 | 583 | |
1da177e4 LT |
584 | |
585 | if (!device || !driver) | |
d550d98d | 586 | return -EINVAL; |
1da177e4 LT |
587 | |
588 | if (!driver->ops.add) | |
d550d98d | 589 | return -ENOSYS; |
1da177e4 LT |
590 | |
591 | result = driver->ops.add(device); | |
592 | if (result) { | |
593 | device->driver = NULL; | |
db89b4f0 | 594 | device->driver_data = NULL; |
d550d98d | 595 | return result; |
1da177e4 LT |
596 | } |
597 | ||
598 | device->driver = driver; | |
599 | ||
600 | /* | |
601 | * TBD - Configuration Management: Assign resources to device based | |
602 | * upon possible configuration and currently allocated resources. | |
603 | */ | |
604 | ||
4be44fcd LB |
605 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
606 | "Driver successfully bound to device\n")); | |
d550d98d | 607 | return 0; |
3fb02738 RS |
608 | } |
609 | ||
8713cbef | 610 | static int acpi_start_single_object(struct acpi_device *device) |
3fb02738 RS |
611 | { |
612 | int result = 0; | |
613 | struct acpi_driver *driver; | |
614 | ||
3fb02738 RS |
615 | |
616 | if (!(driver = device->driver)) | |
d550d98d | 617 | return 0; |
3fb02738 | 618 | |
1da177e4 LT |
619 | if (driver->ops.start) { |
620 | result = driver->ops.start(device); | |
621 | if (result && driver->ops.remove) | |
622 | driver->ops.remove(device, ACPI_BUS_REMOVAL_NORMAL); | |
1da177e4 LT |
623 | } |
624 | ||
d550d98d | 625 | return result; |
1da177e4 LT |
626 | } |
627 | ||
9e89dde2 ZR |
628 | /** |
629 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
630 | * @driver: driver being registered | |
631 | * | |
632 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
633 | * devices that match the driver's criteria and binds. Returns zero for | |
634 | * success or a negative error status for failure. | |
635 | */ | |
636 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
1da177e4 | 637 | { |
1890a97a | 638 | int ret; |
1da177e4 | 639 | |
9e89dde2 ZR |
640 | if (acpi_disabled) |
641 | return -ENODEV; | |
1890a97a PM |
642 | driver->drv.name = driver->name; |
643 | driver->drv.bus = &acpi_bus_type; | |
644 | driver->drv.owner = driver->owner; | |
1da177e4 | 645 | |
1890a97a PM |
646 | ret = driver_register(&driver->drv); |
647 | return ret; | |
9e89dde2 | 648 | } |
1da177e4 | 649 | |
9e89dde2 ZR |
650 | EXPORT_SYMBOL(acpi_bus_register_driver); |
651 | ||
652 | /** | |
653 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus | |
654 | * @driver: driver to unregister | |
655 | * | |
656 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
657 | * devices that match the driver's criteria and unbinds. | |
658 | */ | |
659 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
660 | { | |
1890a97a | 661 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
662 | } |
663 | ||
664 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
665 | ||
9e89dde2 ZR |
666 | /* -------------------------------------------------------------------------- |
667 | Device Enumeration | |
668 | -------------------------------------------------------------------------- */ | |
669 | acpi_status | |
670 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
671 | { | |
672 | acpi_status status; | |
673 | acpi_handle tmp; | |
674 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
675 | union acpi_object *obj; | |
676 | ||
677 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
678 | if (ACPI_FAILURE(status)) | |
679 | return status; | |
680 | ||
681 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
682 | if (ACPI_SUCCESS(status)) { | |
683 | obj = buffer.pointer; | |
3b5fee59 HM |
684 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
685 | ejd); | |
9e89dde2 ZR |
686 | kfree(buffer.pointer); |
687 | } | |
688 | return status; | |
689 | } | |
690 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
691 | ||
692 | void acpi_bus_data_handler(acpi_handle handle, u32 function, void *context) | |
693 | { | |
694 | ||
695 | /* TBD */ | |
696 | ||
697 | return; | |
698 | } | |
699 | ||
9e89dde2 ZR |
700 | static int acpi_bus_get_perf_flags(struct acpi_device *device) |
701 | { | |
702 | device->performance.state = ACPI_STATE_UNKNOWN; | |
703 | return 0; | |
704 | } | |
705 | ||
706 | static acpi_status | |
707 | acpi_bus_extract_wakeup_device_power_package(struct acpi_device *device, | |
708 | union acpi_object *package) | |
709 | { | |
710 | int i = 0; | |
711 | union acpi_object *element = NULL; | |
712 | ||
713 | if (!device || !package || (package->package.count < 2)) | |
714 | return AE_BAD_PARAMETER; | |
715 | ||
716 | element = &(package->package.elements[0]); | |
717 | if (!element) | |
718 | return AE_BAD_PARAMETER; | |
719 | if (element->type == ACPI_TYPE_PACKAGE) { | |
720 | if ((element->package.count < 2) || | |
721 | (element->package.elements[0].type != | |
722 | ACPI_TYPE_LOCAL_REFERENCE) | |
723 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) | |
724 | return AE_BAD_DATA; | |
725 | device->wakeup.gpe_device = | |
726 | element->package.elements[0].reference.handle; | |
727 | device->wakeup.gpe_number = | |
728 | (u32) element->package.elements[1].integer.value; | |
729 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
730 | device->wakeup.gpe_number = element->integer.value; | |
731 | } else | |
732 | return AE_BAD_DATA; | |
733 | ||
734 | element = &(package->package.elements[1]); | |
735 | if (element->type != ACPI_TYPE_INTEGER) { | |
736 | return AE_BAD_DATA; | |
737 | } | |
738 | device->wakeup.sleep_state = element->integer.value; | |
739 | ||
740 | if ((package->package.count - 2) > ACPI_MAX_HANDLES) { | |
741 | return AE_NO_MEMORY; | |
742 | } | |
743 | device->wakeup.resources.count = package->package.count - 2; | |
744 | for (i = 0; i < device->wakeup.resources.count; i++) { | |
745 | element = &(package->package.elements[i + 2]); | |
cd0b2248 | 746 | if (element->type != ACPI_TYPE_LOCAL_REFERENCE) |
9e89dde2 | 747 | return AE_BAD_DATA; |
9e89dde2 ZR |
748 | |
749 | device->wakeup.resources.handles[i] = element->reference.handle; | |
1da177e4 | 750 | } |
9e89dde2 ZR |
751 | |
752 | return AE_OK; | |
1da177e4 LT |
753 | } |
754 | ||
9e89dde2 | 755 | static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
1da177e4 | 756 | { |
9e89dde2 ZR |
757 | acpi_status status = 0; |
758 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
759 | union acpi_object *package = NULL; | |
77e76609 | 760 | int psw_error; |
1da177e4 | 761 | |
29b71a1c TR |
762 | struct acpi_device_id button_device_ids[] = { |
763 | {"PNP0C0D", 0}, | |
764 | {"PNP0C0C", 0}, | |
765 | {"PNP0C0E", 0}, | |
766 | {"", 0}, | |
767 | }; | |
768 | ||
9e89dde2 ZR |
769 | /* _PRW */ |
770 | status = acpi_evaluate_object(device->handle, "_PRW", NULL, &buffer); | |
771 | if (ACPI_FAILURE(status)) { | |
772 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
773 | goto end; | |
1da177e4 | 774 | } |
1da177e4 | 775 | |
9e89dde2 ZR |
776 | package = (union acpi_object *)buffer.pointer; |
777 | status = acpi_bus_extract_wakeup_device_power_package(device, package); | |
778 | if (ACPI_FAILURE(status)) { | |
779 | ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package")); | |
780 | goto end; | |
781 | } | |
1da177e4 | 782 | |
9e89dde2 | 783 | kfree(buffer.pointer); |
1da177e4 | 784 | |
9e89dde2 | 785 | device->wakeup.flags.valid = 1; |
729b2bdb ZY |
786 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
787 | * system for the ACPI device with the _PRW object. | |
788 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. | |
789 | * So it is necessary to call _DSW object first. Only when it is not | |
790 | * present will the _PSW object used. | |
791 | */ | |
77e76609 RW |
792 | psw_error = acpi_device_sleep_wake(device, 0, 0, 0); |
793 | if (psw_error) | |
794 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
795 | "error in _DSW or _PSW evaluation\n")); | |
796 | ||
9e89dde2 | 797 | /* Power button, Lid switch always enable wakeup */ |
29b71a1c | 798 | if (!acpi_match_device_ids(device, button_device_ids)) |
9e89dde2 | 799 | device->wakeup.flags.run_wake = 1; |
1da177e4 | 800 | |
9e89dde2 ZR |
801 | end: |
802 | if (ACPI_FAILURE(status)) | |
803 | device->flags.wake_capable = 0; | |
d550d98d | 804 | return 0; |
1da177e4 | 805 | } |
1da177e4 | 806 | |
9e89dde2 | 807 | static int acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 808 | { |
9e89dde2 ZR |
809 | acpi_status status = 0; |
810 | acpi_handle handle = NULL; | |
811 | u32 i = 0; | |
1a365616 | 812 | |
4be44fcd | 813 | |
9e89dde2 ZR |
814 | /* |
815 | * Power Management Flags | |
816 | */ | |
817 | status = acpi_get_handle(device->handle, "_PSC", &handle); | |
818 | if (ACPI_SUCCESS(status)) | |
819 | device->power.flags.explicit_get = 1; | |
820 | status = acpi_get_handle(device->handle, "_IRC", &handle); | |
821 | if (ACPI_SUCCESS(status)) | |
822 | device->power.flags.inrush_current = 1; | |
1da177e4 | 823 | |
9e89dde2 ZR |
824 | /* |
825 | * Enumerate supported power management states | |
826 | */ | |
827 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3; i++) { | |
828 | struct acpi_device_power_state *ps = &device->power.states[i]; | |
829 | char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' }; | |
1da177e4 | 830 | |
9e89dde2 ZR |
831 | /* Evaluate "_PRx" to se if power resources are referenced */ |
832 | acpi_evaluate_reference(device->handle, object_name, NULL, | |
833 | &ps->resources); | |
834 | if (ps->resources.count) { | |
835 | device->power.flags.power_resources = 1; | |
836 | ps->flags.valid = 1; | |
1da177e4 | 837 | } |
1da177e4 | 838 | |
9e89dde2 ZR |
839 | /* Evaluate "_PSx" to see if we can do explicit sets */ |
840 | object_name[2] = 'S'; | |
841 | status = acpi_get_handle(device->handle, object_name, &handle); | |
842 | if (ACPI_SUCCESS(status)) { | |
843 | ps->flags.explicit_set = 1; | |
844 | ps->flags.valid = 1; | |
1da177e4 | 845 | } |
1da177e4 | 846 | |
9e89dde2 ZR |
847 | /* State is valid if we have some power control */ |
848 | if (ps->resources.count || ps->flags.explicit_set) | |
849 | ps->flags.valid = 1; | |
1da177e4 | 850 | |
9e89dde2 ZR |
851 | ps->power = -1; /* Unknown - driver assigned */ |
852 | ps->latency = -1; /* Unknown - driver assigned */ | |
853 | } | |
1da177e4 | 854 | |
9e89dde2 ZR |
855 | /* Set defaults for D0 and D3 states (always valid) */ |
856 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
857 | device->power.states[ACPI_STATE_D0].power = 100; | |
858 | device->power.states[ACPI_STATE_D3].flags.valid = 1; | |
859 | device->power.states[ACPI_STATE_D3].power = 0; | |
c8f7a62c | 860 | |
9e89dde2 | 861 | /* TBD: System wake support and resource requirements. */ |
c8f7a62c | 862 | |
9e89dde2 | 863 | device->power.state = ACPI_STATE_UNKNOWN; |
a51e145f | 864 | acpi_bus_get_power(device->handle, &(device->power.state)); |
c8f7a62c | 865 | |
9e89dde2 ZR |
866 | return 0; |
867 | } | |
c8f7a62c | 868 | |
4be44fcd | 869 | static int acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 870 | { |
4be44fcd LB |
871 | acpi_status status = AE_OK; |
872 | acpi_handle temp = NULL; | |
1da177e4 | 873 | |
1da177e4 LT |
874 | |
875 | /* Presence of _STA indicates 'dynamic_status' */ | |
876 | status = acpi_get_handle(device->handle, "_STA", &temp); | |
877 | if (ACPI_SUCCESS(status)) | |
878 | device->flags.dynamic_status = 1; | |
879 | ||
880 | /* Presence of _CID indicates 'compatible_ids' */ | |
881 | status = acpi_get_handle(device->handle, "_CID", &temp); | |
882 | if (ACPI_SUCCESS(status)) | |
883 | device->flags.compatible_ids = 1; | |
884 | ||
885 | /* Presence of _RMV indicates 'removable' */ | |
886 | status = acpi_get_handle(device->handle, "_RMV", &temp); | |
887 | if (ACPI_SUCCESS(status)) | |
888 | device->flags.removable = 1; | |
889 | ||
890 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
891 | status = acpi_get_handle(device->handle, "_EJD", &temp); | |
892 | if (ACPI_SUCCESS(status)) | |
893 | device->flags.ejectable = 1; | |
894 | else { | |
895 | status = acpi_get_handle(device->handle, "_EJ0", &temp); | |
896 | if (ACPI_SUCCESS(status)) | |
897 | device->flags.ejectable = 1; | |
898 | } | |
899 | ||
900 | /* Presence of _LCK indicates 'lockable' */ | |
901 | status = acpi_get_handle(device->handle, "_LCK", &temp); | |
902 | if (ACPI_SUCCESS(status)) | |
903 | device->flags.lockable = 1; | |
904 | ||
905 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ | |
906 | status = acpi_get_handle(device->handle, "_PS0", &temp); | |
907 | if (ACPI_FAILURE(status)) | |
908 | status = acpi_get_handle(device->handle, "_PR0", &temp); | |
909 | if (ACPI_SUCCESS(status)) | |
910 | device->flags.power_manageable = 1; | |
911 | ||
912 | /* Presence of _PRW indicates wake capable */ | |
913 | status = acpi_get_handle(device->handle, "_PRW", &temp); | |
914 | if (ACPI_SUCCESS(status)) | |
915 | device->flags.wake_capable = 1; | |
916 | ||
3c5f9be4 | 917 | /* TBD: Performance management */ |
1da177e4 | 918 | |
d550d98d | 919 | return 0; |
1da177e4 LT |
920 | } |
921 | ||
4be44fcd LB |
922 | static void acpi_device_get_busid(struct acpi_device *device, |
923 | acpi_handle handle, int type) | |
1da177e4 | 924 | { |
4be44fcd LB |
925 | char bus_id[5] = { '?', 0 }; |
926 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
927 | int i = 0; | |
1da177e4 LT |
928 | |
929 | /* | |
930 | * Bus ID | |
931 | * ------ | |
932 | * The device's Bus ID is simply the object name. | |
933 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
934 | */ | |
935 | switch (type) { | |
936 | case ACPI_BUS_TYPE_SYSTEM: | |
937 | strcpy(device->pnp.bus_id, "ACPI"); | |
938 | break; | |
939 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
940 | strcpy(device->pnp.bus_id, "PWRF"); | |
941 | break; | |
942 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
943 | strcpy(device->pnp.bus_id, "SLPF"); | |
944 | break; | |
945 | default: | |
946 | acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer); | |
947 | /* Clean up trailing underscores (if any) */ | |
948 | for (i = 3; i > 1; i--) { | |
949 | if (bus_id[i] == '_') | |
950 | bus_id[i] = '\0'; | |
951 | else | |
952 | break; | |
953 | } | |
954 | strcpy(device->pnp.bus_id, bus_id); | |
955 | break; | |
956 | } | |
957 | } | |
958 | ||
54735266 ZR |
959 | /* |
960 | * acpi_bay_match - see if a device is an ejectable driver bay | |
961 | * | |
962 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
963 | * then we can safely call it an ejectable drive bay | |
964 | */ | |
965 | static int acpi_bay_match(struct acpi_device *device){ | |
966 | acpi_status status; | |
967 | acpi_handle handle; | |
968 | acpi_handle tmp; | |
969 | acpi_handle phandle; | |
970 | ||
971 | handle = device->handle; | |
972 | ||
973 | status = acpi_get_handle(handle, "_EJ0", &tmp); | |
974 | if (ACPI_FAILURE(status)) | |
975 | return -ENODEV; | |
976 | ||
977 | if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || | |
978 | (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || | |
979 | (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || | |
980 | (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) | |
981 | return 0; | |
982 | ||
983 | if (acpi_get_parent(handle, &phandle)) | |
984 | return -ENODEV; | |
985 | ||
986 | if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) || | |
987 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) || | |
988 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) || | |
989 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp)))) | |
990 | return 0; | |
991 | ||
992 | return -ENODEV; | |
993 | } | |
994 | ||
3620f2f2 FS |
995 | /* |
996 | * acpi_dock_match - see if a device has a _DCK method | |
997 | */ | |
998 | static int acpi_dock_match(struct acpi_device *device) | |
999 | { | |
1000 | acpi_handle tmp; | |
1001 | return acpi_get_handle(device->handle, "_DCK", &tmp); | |
1002 | } | |
1003 | ||
4be44fcd LB |
1004 | static void acpi_device_set_id(struct acpi_device *device, |
1005 | struct acpi_device *parent, acpi_handle handle, | |
1006 | int type) | |
1da177e4 | 1007 | { |
4be44fcd LB |
1008 | struct acpi_device_info *info; |
1009 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
1010 | char *hid = NULL; | |
1011 | char *uid = NULL; | |
1da177e4 | 1012 | struct acpi_compatible_id_list *cid_list = NULL; |
3620f2f2 | 1013 | const char *cid_add = NULL; |
4be44fcd | 1014 | acpi_status status; |
1da177e4 LT |
1015 | |
1016 | switch (type) { | |
1017 | case ACPI_BUS_TYPE_DEVICE: | |
1018 | status = acpi_get_object_info(handle, &buffer); | |
1019 | if (ACPI_FAILURE(status)) { | |
96b2dd1f | 1020 | printk(KERN_ERR PREFIX "%s: Error reading device info\n", __func__); |
1da177e4 LT |
1021 | return; |
1022 | } | |
1023 | ||
1024 | info = buffer.pointer; | |
1025 | if (info->valid & ACPI_VALID_HID) | |
1026 | hid = info->hardware_id.value; | |
1027 | if (info->valid & ACPI_VALID_UID) | |
1028 | uid = info->unique_id.value; | |
1029 | if (info->valid & ACPI_VALID_CID) | |
1030 | cid_list = &info->compatibility_id; | |
1031 | if (info->valid & ACPI_VALID_ADR) { | |
1032 | device->pnp.bus_address = info->address; | |
1033 | device->flags.bus_address = 1; | |
1034 | } | |
ae843332 | 1035 | |
3620f2f2 FS |
1036 | /* If we have a video/bay/dock device, add our selfdefined |
1037 | HID to the CID list. Like that the video/bay/dock drivers | |
1038 | will get autoloaded and the device might still match | |
1039 | against another driver. | |
1040 | */ | |
c3d6de69 | 1041 | if (acpi_is_video_device(device)) |
3620f2f2 FS |
1042 | cid_add = ACPI_VIDEO_HID; |
1043 | else if (ACPI_SUCCESS(acpi_bay_match(device))) | |
1044 | cid_add = ACPI_BAY_HID; | |
1045 | else if (ACPI_SUCCESS(acpi_dock_match(device))) | |
1046 | cid_add = ACPI_DOCK_HID; | |
54735266 | 1047 | |
1da177e4 LT |
1048 | break; |
1049 | case ACPI_BUS_TYPE_POWER: | |
1050 | hid = ACPI_POWER_HID; | |
1051 | break; | |
1052 | case ACPI_BUS_TYPE_PROCESSOR: | |
ad93a765 | 1053 | hid = ACPI_PROCESSOR_OBJECT_HID; |
1da177e4 LT |
1054 | break; |
1055 | case ACPI_BUS_TYPE_SYSTEM: | |
1056 | hid = ACPI_SYSTEM_HID; | |
1057 | break; | |
1058 | case ACPI_BUS_TYPE_THERMAL: | |
1059 | hid = ACPI_THERMAL_HID; | |
1060 | break; | |
1061 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
1062 | hid = ACPI_BUTTON_HID_POWERF; | |
1063 | break; | |
1064 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
1065 | hid = ACPI_BUTTON_HID_SLEEPF; | |
1066 | break; | |
1067 | } | |
1068 | ||
1069 | /* | |
1070 | * \_SB | |
1071 | * ---- | |
1072 | * Fix for the system root bus device -- the only root-level device. | |
1073 | */ | |
c51a4de8 | 1074 | if (((acpi_handle)parent == ACPI_ROOT_OBJECT) && (type == ACPI_BUS_TYPE_DEVICE)) { |
1da177e4 LT |
1075 | hid = ACPI_BUS_HID; |
1076 | strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME); | |
1077 | strcpy(device->pnp.device_class, ACPI_BUS_CLASS); | |
1078 | } | |
1079 | ||
1080 | if (hid) { | |
1081 | strcpy(device->pnp.hardware_id, hid); | |
1082 | device->flags.hardware_id = 1; | |
1083 | } | |
1084 | if (uid) { | |
1085 | strcpy(device->pnp.unique_id, uid); | |
1086 | device->flags.unique_id = 1; | |
1087 | } | |
3620f2f2 FS |
1088 | if (cid_list || cid_add) { |
1089 | struct acpi_compatible_id_list *list; | |
1090 | int size = 0; | |
1091 | int count = 0; | |
1092 | ||
1093 | if (cid_list) { | |
1094 | size = cid_list->size; | |
1095 | } else if (cid_add) { | |
1096 | size = sizeof(struct acpi_compatible_id_list); | |
1097 | cid_list = ACPI_ALLOCATE_ZEROED((acpi_size) size); | |
1098 | if (!cid_list) { | |
1099 | printk(KERN_ERR "Memory allocation error\n"); | |
1100 | kfree(buffer.pointer); | |
1101 | return; | |
1102 | } else { | |
1103 | cid_list->count = 0; | |
1104 | cid_list->size = size; | |
1105 | } | |
1106 | } | |
1107 | if (cid_add) | |
1108 | size += sizeof(struct acpi_compatible_id); | |
1109 | list = kmalloc(size, GFP_KERNEL); | |
1110 | ||
1111 | if (list) { | |
1112 | if (cid_list) { | |
1113 | memcpy(list, cid_list, cid_list->size); | |
1114 | count = cid_list->count; | |
1115 | } | |
1116 | if (cid_add) { | |
1117 | strncpy(list->id[count].value, cid_add, | |
1118 | ACPI_MAX_CID_LENGTH); | |
1119 | count++; | |
1120 | device->flags.compatible_ids = 1; | |
1121 | } | |
1122 | list->size = size; | |
1123 | list->count = count; | |
1124 | device->pnp.cid_list = list; | |
1125 | } else | |
87ecd5cd | 1126 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
1da177e4 LT |
1127 | } |
1128 | ||
02438d87 | 1129 | kfree(buffer.pointer); |
1da177e4 LT |
1130 | } |
1131 | ||
4be44fcd | 1132 | static int acpi_device_set_context(struct acpi_device *device, int type) |
1da177e4 LT |
1133 | { |
1134 | acpi_status status = AE_OK; | |
1135 | int result = 0; | |
1136 | /* | |
1137 | * Context | |
1138 | * ------- | |
1139 | * Attach this 'struct acpi_device' to the ACPI object. This makes | |
1140 | * resolutions from handle->device very efficient. Note that we need | |
1141 | * to be careful with fixed-feature devices as they all attach to the | |
1142 | * root object. | |
1143 | */ | |
4be44fcd | 1144 | if (type != ACPI_BUS_TYPE_POWER_BUTTON && |
1da177e4 LT |
1145 | type != ACPI_BUS_TYPE_SLEEP_BUTTON) { |
1146 | status = acpi_attach_data(device->handle, | |
4be44fcd | 1147 | acpi_bus_data_handler, device); |
1da177e4 LT |
1148 | |
1149 | if (ACPI_FAILURE(status)) { | |
87ecd5cd | 1150 | printk(KERN_ERR PREFIX "Error attaching device data\n"); |
1da177e4 LT |
1151 | result = -ENODEV; |
1152 | } | |
1153 | } | |
1154 | return result; | |
1155 | } | |
1156 | ||
4be44fcd | 1157 | static int acpi_bus_remove(struct acpi_device *dev, int rmdevice) |
1da177e4 | 1158 | { |
1da177e4 | 1159 | if (!dev) |
d550d98d | 1160 | return -EINVAL; |
1da177e4 | 1161 | |
96333578 | 1162 | dev->removal_type = ACPI_BUS_REMOVAL_EJECT; |
1890a97a | 1163 | device_release_driver(&dev->dev); |
1da177e4 LT |
1164 | |
1165 | if (!rmdevice) | |
d550d98d | 1166 | return 0; |
1da177e4 | 1167 | |
2786f6e3 RZ |
1168 | /* |
1169 | * unbind _ADR-Based Devices when hot removal | |
1170 | */ | |
1da177e4 LT |
1171 | if (dev->flags.bus_address) { |
1172 | if ((dev->parent) && (dev->parent->ops.unbind)) | |
1173 | dev->parent->ops.unbind(dev); | |
1174 | } | |
1da177e4 LT |
1175 | acpi_device_unregister(dev, ACPI_BUS_REMOVAL_EJECT); |
1176 | ||
d550d98d | 1177 | return 0; |
1da177e4 LT |
1178 | } |
1179 | ||
3fb02738 | 1180 | static int |
4be44fcd | 1181 | acpi_add_single_object(struct acpi_device **child, |
c4168bff LS |
1182 | struct acpi_device *parent, acpi_handle handle, int type, |
1183 | struct acpi_bus_ops *ops) | |
1da177e4 | 1184 | { |
4be44fcd LB |
1185 | int result = 0; |
1186 | struct acpi_device *device = NULL; | |
1da177e4 | 1187 | |
1da177e4 LT |
1188 | |
1189 | if (!child) | |
d550d98d | 1190 | return -EINVAL; |
1da177e4 | 1191 | |
36bcbec7 | 1192 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 1193 | if (!device) { |
6468463a | 1194 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 1195 | return -ENOMEM; |
1da177e4 | 1196 | } |
1da177e4 LT |
1197 | |
1198 | device->handle = handle; | |
1199 | device->parent = parent; | |
c4168bff LS |
1200 | device->bus_ops = *ops; /* workround for not call .start */ |
1201 | ||
1da177e4 | 1202 | |
4be44fcd | 1203 | acpi_device_get_busid(device, handle, type); |
1da177e4 LT |
1204 | |
1205 | /* | |
1206 | * Flags | |
1207 | * ----- | |
1208 | * Get prior to calling acpi_bus_get_status() so we know whether | |
1209 | * or not _STA is present. Note that we only look for object | |
1210 | * handles -- cannot evaluate objects until we know the device is | |
1211 | * present and properly initialized. | |
1212 | */ | |
1213 | result = acpi_bus_get_flags(device); | |
1214 | if (result) | |
1215 | goto end; | |
1216 | ||
1217 | /* | |
1218 | * Status | |
1219 | * ------ | |
6940faba KT |
1220 | * See if the device is present. We always assume that non-Device |
1221 | * and non-Processor objects (e.g. thermal zones, power resources, | |
1222 | * etc.) are present, functioning, etc. (at least when parent object | |
1223 | * is present). Note that _STA has a different meaning for some | |
1224 | * objects (e.g. power resources) so we need to be careful how we use | |
1225 | * it. | |
1da177e4 LT |
1226 | */ |
1227 | switch (type) { | |
6940faba | 1228 | case ACPI_BUS_TYPE_PROCESSOR: |
1da177e4 LT |
1229 | case ACPI_BUS_TYPE_DEVICE: |
1230 | result = acpi_bus_get_status(device); | |
3620f2f2 FS |
1231 | if (ACPI_FAILURE(result)) { |
1232 | result = -ENODEV; | |
1da177e4 LT |
1233 | goto end; |
1234 | } | |
39a0ad87 ZY |
1235 | /* |
1236 | * When the device is neither present nor functional, the | |
1237 | * device should not be added to Linux ACPI device tree. | |
1238 | * When the status of the device is not present but functinal, | |
1239 | * it should be added to Linux ACPI tree. For example : bay | |
1240 | * device , dock device. | |
1241 | * In such conditions it is unncessary to check whether it is | |
1242 | * bay device or dock device. | |
1243 | */ | |
1244 | if (!device->status.present && !device->status.functional) { | |
1245 | result = -ENODEV; | |
1246 | goto end; | |
3620f2f2 | 1247 | } |
1da177e4 LT |
1248 | break; |
1249 | default: | |
0c0e8921 BH |
1250 | STRUCT_TO_INT(device->status) = |
1251 | ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | | |
1252 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; | |
1da177e4 LT |
1253 | break; |
1254 | } | |
1255 | ||
1256 | /* | |
1257 | * Initialize Device | |
1258 | * ----------------- | |
1259 | * TBD: Synch with Core's enumeration/initialization process. | |
1260 | */ | |
1261 | ||
1262 | /* | |
1263 | * Hardware ID, Unique ID, & Bus Address | |
1264 | * ------------------------------------- | |
1265 | */ | |
4be44fcd | 1266 | acpi_device_set_id(device, parent, handle, type); |
1da177e4 | 1267 | |
eab4b645 ZY |
1268 | /* |
1269 | * The ACPI device is attached to acpi handle before getting | |
1270 | * the power/wakeup/peformance flags. Otherwise OS can't get | |
1271 | * the corresponding ACPI device by the acpi handle in the course | |
1272 | * of getting the power/wakeup/performance flags. | |
1273 | */ | |
1274 | result = acpi_device_set_context(device, type); | |
1275 | if (result) | |
1276 | goto end; | |
1277 | ||
1da177e4 LT |
1278 | /* |
1279 | * Power Management | |
1280 | * ---------------- | |
1281 | */ | |
1282 | if (device->flags.power_manageable) { | |
1283 | result = acpi_bus_get_power_flags(device); | |
1284 | if (result) | |
1285 | goto end; | |
1286 | } | |
1287 | ||
4be44fcd | 1288 | /* |
1da177e4 LT |
1289 | * Wakeup device management |
1290 | *----------------------- | |
1291 | */ | |
1292 | if (device->flags.wake_capable) { | |
1293 | result = acpi_bus_get_wakeup_device_flags(device); | |
1294 | if (result) | |
1295 | goto end; | |
1296 | } | |
1297 | ||
1298 | /* | |
1299 | * Performance Management | |
1300 | * ---------------------- | |
1301 | */ | |
1302 | if (device->flags.performance_manageable) { | |
1303 | result = acpi_bus_get_perf_flags(device); | |
1304 | if (result) | |
1305 | goto end; | |
1306 | } | |
1307 | ||
1da177e4 | 1308 | |
e49bd2dd | 1309 | result = acpi_device_register(device, parent); |
1da177e4 LT |
1310 | |
1311 | /* | |
2786f6e3 | 1312 | * Bind _ADR-Based Devices when hot add |
1da177e4 LT |
1313 | */ |
1314 | if (device->flags.bus_address) { | |
1315 | if (device->parent && device->parent->ops.bind) | |
1316 | device->parent->ops.bind(device); | |
1317 | } | |
1318 | ||
4be44fcd | 1319 | end: |
1da177e4 LT |
1320 | if (!result) |
1321 | *child = device; | |
1322 | else { | |
6044ec88 | 1323 | kfree(device->pnp.cid_list); |
1da177e4 LT |
1324 | kfree(device); |
1325 | } | |
1326 | ||
d550d98d | 1327 | return result; |
1da177e4 | 1328 | } |
1da177e4 | 1329 | |
4be44fcd | 1330 | static int acpi_bus_scan(struct acpi_device *start, struct acpi_bus_ops *ops) |
1da177e4 | 1331 | { |
4be44fcd LB |
1332 | acpi_status status = AE_OK; |
1333 | struct acpi_device *parent = NULL; | |
1334 | struct acpi_device *child = NULL; | |
1335 | acpi_handle phandle = NULL; | |
1336 | acpi_handle chandle = NULL; | |
1337 | acpi_object_type type = 0; | |
1338 | u32 level = 1; | |
1da177e4 | 1339 | |
1da177e4 LT |
1340 | |
1341 | if (!start) | |
d550d98d | 1342 | return -EINVAL; |
1da177e4 LT |
1343 | |
1344 | parent = start; | |
1345 | phandle = start->handle; | |
4be44fcd | 1346 | |
1da177e4 LT |
1347 | /* |
1348 | * Parse through the ACPI namespace, identify all 'devices', and | |
1349 | * create a new 'struct acpi_device' for each. | |
1350 | */ | |
1351 | while ((level > 0) && parent) { | |
1352 | ||
1353 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, | |
4be44fcd | 1354 | chandle, &chandle); |
1da177e4 LT |
1355 | |
1356 | /* | |
1357 | * If this scope is exhausted then move our way back up. | |
1358 | */ | |
1359 | if (ACPI_FAILURE(status)) { | |
1360 | level--; | |
1361 | chandle = phandle; | |
1362 | acpi_get_parent(phandle, &phandle); | |
1363 | if (parent->parent) | |
1364 | parent = parent->parent; | |
1365 | continue; | |
1366 | } | |
1367 | ||
1368 | status = acpi_get_type(chandle, &type); | |
1369 | if (ACPI_FAILURE(status)) | |
1370 | continue; | |
1371 | ||
1372 | /* | |
1373 | * If this is a scope object then parse it (depth-first). | |
1374 | */ | |
1375 | if (type == ACPI_TYPE_LOCAL_SCOPE) { | |
1376 | level++; | |
1377 | phandle = chandle; | |
1378 | chandle = NULL; | |
1379 | continue; | |
1380 | } | |
1381 | ||
1382 | /* | |
1383 | * We're only interested in objects that we consider 'devices'. | |
1384 | */ | |
1385 | switch (type) { | |
1386 | case ACPI_TYPE_DEVICE: | |
1387 | type = ACPI_BUS_TYPE_DEVICE; | |
1388 | break; | |
1389 | case ACPI_TYPE_PROCESSOR: | |
1390 | type = ACPI_BUS_TYPE_PROCESSOR; | |
1391 | break; | |
1392 | case ACPI_TYPE_THERMAL: | |
1393 | type = ACPI_BUS_TYPE_THERMAL; | |
1394 | break; | |
1395 | case ACPI_TYPE_POWER: | |
1396 | type = ACPI_BUS_TYPE_POWER; | |
1397 | break; | |
1398 | default: | |
1399 | continue; | |
1400 | } | |
1401 | ||
3fb02738 RS |
1402 | if (ops->acpi_op_add) |
1403 | status = acpi_add_single_object(&child, parent, | |
c4168bff | 1404 | chandle, type, ops); |
4be44fcd | 1405 | else |
3fb02738 RS |
1406 | status = acpi_bus_get_device(chandle, &child); |
1407 | ||
4be44fcd LB |
1408 | if (ACPI_FAILURE(status)) |
1409 | continue; | |
3fb02738 | 1410 | |
c4168bff | 1411 | if (ops->acpi_op_start && !(ops->acpi_op_add)) { |
3fb02738 RS |
1412 | status = acpi_start_single_object(child); |
1413 | if (ACPI_FAILURE(status)) | |
1414 | continue; | |
1415 | } | |
1da177e4 LT |
1416 | |
1417 | /* | |
1418 | * If the device is present, enabled, and functioning then | |
1419 | * parse its scope (depth-first). Note that we need to | |
1420 | * represent absent devices to facilitate PnP notifications | |
1421 | * -- but only the subtree head (not all of its children, | |
1422 | * which will be enumerated when the parent is inserted). | |
1423 | * | |
1424 | * TBD: Need notifications and other detection mechanisms | |
4be44fcd | 1425 | * in place before we can fully implement this. |
1da177e4 | 1426 | */ |
39a0ad87 ZY |
1427 | /* |
1428 | * When the device is not present but functional, it is also | |
1429 | * necessary to scan the children of this device. | |
1430 | */ | |
1431 | if (child->status.present || (!child->status.present && | |
1432 | child->status.functional)) { | |
1da177e4 LT |
1433 | status = acpi_get_next_object(ACPI_TYPE_ANY, chandle, |
1434 | NULL, NULL); | |
1435 | if (ACPI_SUCCESS(status)) { | |
1436 | level++; | |
1437 | phandle = chandle; | |
1438 | chandle = NULL; | |
1439 | parent = child; | |
1440 | } | |
1441 | } | |
1442 | } | |
1443 | ||
d550d98d | 1444 | return 0; |
1da177e4 | 1445 | } |
1da177e4 | 1446 | |
3fb02738 | 1447 | int |
4be44fcd LB |
1448 | acpi_bus_add(struct acpi_device **child, |
1449 | struct acpi_device *parent, acpi_handle handle, int type) | |
3fb02738 RS |
1450 | { |
1451 | int result; | |
1452 | struct acpi_bus_ops ops; | |
1453 | ||
c4168bff LS |
1454 | memset(&ops, 0, sizeof(ops)); |
1455 | ops.acpi_op_add = 1; | |
3fb02738 | 1456 | |
c4168bff LS |
1457 | result = acpi_add_single_object(child, parent, handle, type, &ops); |
1458 | if (!result) | |
3fb02738 | 1459 | result = acpi_bus_scan(*child, &ops); |
c4168bff | 1460 | |
d550d98d | 1461 | return result; |
3fb02738 | 1462 | } |
4be44fcd | 1463 | |
3fb02738 RS |
1464 | EXPORT_SYMBOL(acpi_bus_add); |
1465 | ||
4be44fcd | 1466 | int acpi_bus_start(struct acpi_device *device) |
3fb02738 RS |
1467 | { |
1468 | int result; | |
1469 | struct acpi_bus_ops ops; | |
1470 | ||
3fb02738 RS |
1471 | |
1472 | if (!device) | |
d550d98d | 1473 | return -EINVAL; |
3fb02738 RS |
1474 | |
1475 | result = acpi_start_single_object(device); | |
1476 | if (!result) { | |
1477 | memset(&ops, 0, sizeof(ops)); | |
1478 | ops.acpi_op_start = 1; | |
1479 | result = acpi_bus_scan(device, &ops); | |
1480 | } | |
d550d98d | 1481 | return result; |
3fb02738 | 1482 | } |
4be44fcd | 1483 | |
3fb02738 | 1484 | EXPORT_SYMBOL(acpi_bus_start); |
1da177e4 | 1485 | |
ceaba663 | 1486 | int acpi_bus_trim(struct acpi_device *start, int rmdevice) |
1da177e4 | 1487 | { |
4be44fcd LB |
1488 | acpi_status status; |
1489 | struct acpi_device *parent, *child; | |
1490 | acpi_handle phandle, chandle; | |
1491 | acpi_object_type type; | |
1492 | u32 level = 1; | |
1493 | int err = 0; | |
1494 | ||
1495 | parent = start; | |
1da177e4 LT |
1496 | phandle = start->handle; |
1497 | child = chandle = NULL; | |
1498 | ||
1499 | while ((level > 0) && parent && (!err)) { | |
1500 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, | |
4be44fcd | 1501 | chandle, &chandle); |
1da177e4 LT |
1502 | |
1503 | /* | |
1504 | * If this scope is exhausted then move our way back up. | |
1505 | */ | |
1506 | if (ACPI_FAILURE(status)) { | |
1507 | level--; | |
1508 | chandle = phandle; | |
1509 | acpi_get_parent(phandle, &phandle); | |
1510 | child = parent; | |
1511 | parent = parent->parent; | |
1512 | ||
1513 | if (level == 0) | |
1514 | err = acpi_bus_remove(child, rmdevice); | |
1515 | else | |
1516 | err = acpi_bus_remove(child, 1); | |
1517 | ||
1518 | continue; | |
1519 | } | |
1520 | ||
1521 | status = acpi_get_type(chandle, &type); | |
1522 | if (ACPI_FAILURE(status)) { | |
1523 | continue; | |
1524 | } | |
1525 | /* | |
1526 | * If there is a device corresponding to chandle then | |
1527 | * parse it (depth-first). | |
1528 | */ | |
1529 | if (acpi_bus_get_device(chandle, &child) == 0) { | |
1530 | level++; | |
1531 | phandle = chandle; | |
1532 | chandle = NULL; | |
1533 | parent = child; | |
1534 | } | |
1535 | continue; | |
1536 | } | |
1537 | return err; | |
1538 | } | |
ceaba663 KA |
1539 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
1540 | ||
1da177e4 | 1541 | |
4be44fcd | 1542 | static int acpi_bus_scan_fixed(struct acpi_device *root) |
1da177e4 | 1543 | { |
4be44fcd LB |
1544 | int result = 0; |
1545 | struct acpi_device *device = NULL; | |
c4168bff | 1546 | struct acpi_bus_ops ops; |
1da177e4 LT |
1547 | |
1548 | if (!root) | |
d550d98d | 1549 | return -ENODEV; |
1da177e4 | 1550 | |
c4168bff LS |
1551 | memset(&ops, 0, sizeof(ops)); |
1552 | ops.acpi_op_add = 1; | |
1553 | ops.acpi_op_start = 1; | |
1554 | ||
1da177e4 LT |
1555 | /* |
1556 | * Enumerate all fixed-feature devices. | |
1557 | */ | |
cee324b1 | 1558 | if ((acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON) == 0) { |
3fb02738 | 1559 | result = acpi_add_single_object(&device, acpi_root, |
4be44fcd | 1560 | NULL, |
c4168bff LS |
1561 | ACPI_BUS_TYPE_POWER_BUTTON, |
1562 | &ops); | |
3fb02738 | 1563 | } |
1da177e4 | 1564 | |
cee324b1 | 1565 | if ((acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON) == 0) { |
3fb02738 | 1566 | result = acpi_add_single_object(&device, acpi_root, |
4be44fcd | 1567 | NULL, |
c4168bff LS |
1568 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
1569 | &ops); | |
3fb02738 | 1570 | } |
1da177e4 | 1571 | |
d550d98d | 1572 | return result; |
1da177e4 LT |
1573 | } |
1574 | ||
e747f274 | 1575 | int __init acpi_scan_init(void) |
1da177e4 LT |
1576 | { |
1577 | int result; | |
3fb02738 | 1578 | struct acpi_bus_ops ops; |
1da177e4 | 1579 | |
c4168bff LS |
1580 | memset(&ops, 0, sizeof(ops)); |
1581 | ops.acpi_op_add = 1; | |
1582 | ops.acpi_op_start = 1; | |
1da177e4 | 1583 | |
5b327265 PM |
1584 | result = bus_register(&acpi_bus_type); |
1585 | if (result) { | |
1586 | /* We don't want to quit even if we failed to add suspend/resume */ | |
1587 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
1588 | } | |
1589 | ||
1da177e4 LT |
1590 | /* |
1591 | * Create the root device in the bus's device tree | |
1592 | */ | |
3fb02738 | 1593 | result = acpi_add_single_object(&acpi_root, NULL, ACPI_ROOT_OBJECT, |
c4168bff | 1594 | ACPI_BUS_TYPE_SYSTEM, &ops); |
1da177e4 LT |
1595 | if (result) |
1596 | goto Done; | |
1597 | ||
1598 | /* | |
1599 | * Enumerate devices in the ACPI namespace. | |
1600 | */ | |
1601 | result = acpi_bus_scan_fixed(acpi_root); | |
c04209a7 | 1602 | |
c4168bff | 1603 | if (!result) |
3fb02738 | 1604 | result = acpi_bus_scan(acpi_root, &ops); |
1da177e4 LT |
1605 | |
1606 | if (result) | |
1607 | acpi_device_unregister(acpi_root, ACPI_BUS_REMOVAL_NORMAL); | |
1608 | ||
4be44fcd | 1609 | Done: |
d550d98d | 1610 | return result; |
1da177e4 | 1611 | } |