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> | |
5a0e3ad6 | 7 | #include <linux/slab.h> |
9b6d97b6 | 8 | #include <linux/kernel.h> |
1da177e4 | 9 | #include <linux/acpi.h> |
74523c90 AK |
10 | #include <linux/signal.h> |
11 | #include <linux/kthread.h> | |
222e82ac | 12 | #include <linux/dmi.h> |
d1efe3c3 | 13 | #include <linux/nls.h> |
1da177e4 LT |
14 | |
15 | #include <acpi/acpi_drivers.h> | |
1da177e4 | 16 | |
e60cc7a6 BH |
17 | #include "internal.h" |
18 | ||
1da177e4 | 19 | #define _COMPONENT ACPI_BUS_COMPONENT |
f52fd66d | 20 | ACPI_MODULE_NAME("scan"); |
1da177e4 | 21 | #define STRUCT_TO_INT(s) (*((int*)&s)) |
4be44fcd | 22 | extern struct acpi_device *acpi_root; |
1da177e4 LT |
23 | |
24 | #define ACPI_BUS_CLASS "system_bus" | |
29b71a1c | 25 | #define ACPI_BUS_HID "LNXSYBUS" |
1da177e4 LT |
26 | #define ACPI_BUS_DEVICE_NAME "System Bus" |
27 | ||
859ac9a4 BH |
28 | #define ACPI_IS_ROOT_DEVICE(device) (!(device)->parent) |
29 | ||
620e112c | 30 | static const char *dummy_hid = "device"; |
2b2ae7c7 | 31 | |
1da177e4 | 32 | static LIST_HEAD(acpi_device_list); |
e49bd2dd | 33 | static LIST_HEAD(acpi_bus_id_list); |
9090589d | 34 | DEFINE_MUTEX(acpi_device_lock); |
1da177e4 LT |
35 | LIST_HEAD(acpi_wakeup_device_list); |
36 | ||
e49bd2dd | 37 | struct acpi_device_bus_id{ |
bb095854 | 38 | char bus_id[15]; |
e49bd2dd ZR |
39 | unsigned int instance_no; |
40 | struct list_head node; | |
1da177e4 | 41 | }; |
29b71a1c TR |
42 | |
43 | /* | |
44 | * Creates hid/cid(s) string needed for modalias and uevent | |
45 | * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: | |
46 | * char *modalias: "acpi:IBM0001:ACPI0001" | |
47 | */ | |
b3e572d2 AB |
48 | static int create_modalias(struct acpi_device *acpi_dev, char *modalias, |
49 | int size) | |
50 | { | |
29b71a1c | 51 | int len; |
5c9fcb5d | 52 | int count; |
7f47fa6c | 53 | struct acpi_hardware_id *id; |
29b71a1c | 54 | |
2b2ae7c7 TR |
55 | if (list_empty(&acpi_dev->pnp.ids)) |
56 | return 0; | |
57 | ||
5c9fcb5d | 58 | len = snprintf(modalias, size, "acpi:"); |
29b71a1c TR |
59 | size -= len; |
60 | ||
7f47fa6c BH |
61 | list_for_each_entry(id, &acpi_dev->pnp.ids, list) { |
62 | count = snprintf(&modalias[len], size, "%s:", id->id); | |
5c9fcb5d ZR |
63 | if (count < 0 || count >= size) |
64 | return -EINVAL; | |
65 | len += count; | |
66 | size -= count; | |
67 | } | |
68 | ||
29b71a1c TR |
69 | modalias[len] = '\0'; |
70 | return len; | |
71 | } | |
72 | ||
73 | static ssize_t | |
74 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
75 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
76 | int len; | |
77 | ||
78 | /* Device has no HID and no CID or string is >1024 */ | |
79 | len = create_modalias(acpi_dev, buf, 1024); | |
80 | if (len <= 0) | |
81 | return 0; | |
82 | buf[len++] = '\n'; | |
83 | return len; | |
84 | } | |
85 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); | |
86 | ||
c4753e57 TK |
87 | /** |
88 | * acpi_bus_hot_remove_device: hot-remove a device and its children | |
89 | * @context: struct acpi_eject_event pointer (freed in this func) | |
90 | * | |
91 | * Hot-remove a device and its children. This function frees up the | |
92 | * memory space passed by arg context, so that the caller may call | |
93 | * this function asynchronously through acpi_os_hotplug_execute(). | |
94 | */ | |
95 | void acpi_bus_hot_remove_device(void *context) | |
1da177e4 | 96 | { |
c4753e57 | 97 | struct acpi_eject_event *ej_event = (struct acpi_eject_event *) context; |
26d46867 | 98 | struct acpi_device *device; |
c4753e57 | 99 | acpi_handle handle = ej_event->handle; |
b3c450c3 | 100 | acpi_handle temp; |
1da177e4 LT |
101 | struct acpi_object_list arg_list; |
102 | union acpi_object arg; | |
103 | acpi_status status = AE_OK; | |
c4753e57 | 104 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; /* default */ |
1da177e4 | 105 | |
26d46867 | 106 | if (acpi_bus_get_device(handle, &device)) |
c4753e57 | 107 | goto err_out; |
26d46867 ZR |
108 | |
109 | if (!device) | |
c4753e57 | 110 | goto err_out; |
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"); | |
c4753e57 | 118 | goto err_out; |
26d46867 | 119 | } |
1da177e4 | 120 | |
b3c450c3 TK |
121 | /* device has been freed */ |
122 | device = NULL; | |
123 | ||
26d46867 ZR |
124 | /* power off device */ |
125 | status = acpi_evaluate_object(handle, "_PS3", NULL, NULL); | |
126 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) | |
55ac9a01 LM |
127 | printk(KERN_WARNING PREFIX |
128 | "Power-off device failed\n"); | |
26d46867 | 129 | |
b3c450c3 | 130 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_LCK", &temp))) { |
1da177e4 LT |
131 | arg_list.count = 1; |
132 | arg_list.pointer = &arg; | |
133 | arg.type = ACPI_TYPE_INTEGER; | |
134 | arg.integer.value = 0; | |
135 | acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); | |
136 | } | |
1da177e4 | 137 | |
1da177e4 LT |
138 | arg_list.count = 1; |
139 | arg_list.pointer = &arg; | |
140 | arg.type = ACPI_TYPE_INTEGER; | |
141 | arg.integer.value = 1; | |
1da177e4 | 142 | |
1da177e4 LT |
143 | /* |
144 | * TBD: _EJD support. | |
145 | */ | |
1da177e4 | 146 | status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); |
c4753e57 TK |
147 | if (ACPI_FAILURE(status)) { |
148 | if (status != AE_NOT_FOUND) | |
149 | printk(KERN_WARNING PREFIX | |
150 | "Eject device failed\n"); | |
151 | goto err_out; | |
152 | } | |
1da177e4 | 153 | |
c4753e57 TK |
154 | kfree(context); |
155 | return; | |
1da177e4 | 156 | |
c4753e57 TK |
157 | err_out: |
158 | /* Inform firmware the hot-remove operation has completed w/ error */ | |
159 | (void) acpi_evaluate_hotplug_ost(handle, | |
160 | ej_event->event, ost_code, NULL); | |
161 | kfree(context); | |
c8d72a5e | 162 | return; |
1da177e4 | 163 | } |
61622acc | 164 | EXPORT_SYMBOL(acpi_bus_hot_remove_device); |
1da177e4 | 165 | |
1da177e4 | 166 | static ssize_t |
f883d9db PM |
167 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
168 | const char *buf, size_t count) | |
1da177e4 | 169 | { |
4be44fcd | 170 | int ret = count; |
4be44fcd | 171 | acpi_status status; |
4be44fcd | 172 | acpi_object_type type = 0; |
f883d9db | 173 | struct acpi_device *acpi_device = to_acpi_device(d); |
c4753e57 | 174 | struct acpi_eject_event *ej_event; |
1da177e4 | 175 | |
1da177e4 LT |
176 | if ((!count) || (buf[0] != '1')) { |
177 | return -EINVAL; | |
178 | } | |
1da177e4 | 179 | #ifndef FORCE_EJECT |
f883d9db | 180 | if (acpi_device->driver == NULL) { |
1da177e4 LT |
181 | ret = -ENODEV; |
182 | goto err; | |
183 | } | |
184 | #endif | |
f883d9db PM |
185 | status = acpi_get_type(acpi_device->handle, &type); |
186 | if (ACPI_FAILURE(status) || (!acpi_device->flags.ejectable)) { | |
1da177e4 LT |
187 | ret = -ENODEV; |
188 | goto err; | |
189 | } | |
1da177e4 | 190 | |
c4753e57 TK |
191 | ej_event = kmalloc(sizeof(*ej_event), GFP_KERNEL); |
192 | if (!ej_event) { | |
193 | ret = -ENOMEM; | |
194 | goto err; | |
195 | } | |
196 | ||
197 | ej_event->handle = acpi_device->handle; | |
198 | if (acpi_device->flags.eject_pending) { | |
199 | /* event originated from ACPI eject notification */ | |
200 | ej_event->event = ACPI_NOTIFY_EJECT_REQUEST; | |
201 | acpi_device->flags.eject_pending = 0; | |
202 | } else { | |
203 | /* event originated from user */ | |
204 | ej_event->event = ACPI_OST_EC_OSPM_EJECT; | |
205 | (void) acpi_evaluate_hotplug_ost(ej_event->handle, | |
206 | ej_event->event, ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); | |
207 | } | |
208 | ||
209 | acpi_os_hotplug_execute(acpi_bus_hot_remove_device, (void *)ej_event); | |
74523c90 | 210 | err: |
1da177e4 | 211 | return ret; |
1da177e4 LT |
212 | } |
213 | ||
f883d9db | 214 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
1da177e4 | 215 | |
e49bd2dd ZR |
216 | static ssize_t |
217 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
218 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1da177e4 | 219 | |
ea8d82fd | 220 | return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev)); |
1da177e4 | 221 | } |
e49bd2dd | 222 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
1da177e4 | 223 | |
923d4a45 LZ |
224 | static ssize_t acpi_device_uid_show(struct device *dev, |
225 | struct device_attribute *attr, char *buf) | |
226 | { | |
227 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
228 | ||
229 | return sprintf(buf, "%s\n", acpi_dev->pnp.unique_id); | |
230 | } | |
231 | static DEVICE_ATTR(uid, 0444, acpi_device_uid_show, NULL); | |
232 | ||
233 | static ssize_t acpi_device_adr_show(struct device *dev, | |
234 | struct device_attribute *attr, char *buf) | |
235 | { | |
236 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
237 | ||
238 | return sprintf(buf, "0x%08x\n", | |
239 | (unsigned int)(acpi_dev->pnp.bus_address)); | |
240 | } | |
241 | static DEVICE_ATTR(adr, 0444, acpi_device_adr_show, NULL); | |
242 | ||
e49bd2dd ZR |
243 | static ssize_t |
244 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
245 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
246 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
247 | int result; | |
1da177e4 | 248 | |
e49bd2dd | 249 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
0c526d96 | 250 | if (result) |
e49bd2dd | 251 | goto end; |
1da177e4 | 252 | |
e49bd2dd ZR |
253 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
254 | kfree(path.pointer); | |
0c526d96 | 255 | end: |
e49bd2dd | 256 | return result; |
1da177e4 | 257 | } |
e49bd2dd | 258 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
1da177e4 | 259 | |
d1efe3c3 LO |
260 | /* sysfs file that shows description text from the ACPI _STR method */ |
261 | static ssize_t description_show(struct device *dev, | |
262 | struct device_attribute *attr, | |
263 | char *buf) { | |
264 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
265 | int result; | |
266 | ||
267 | if (acpi_dev->pnp.str_obj == NULL) | |
268 | return 0; | |
269 | ||
270 | /* | |
271 | * The _STR object contains a Unicode identifier for a device. | |
272 | * We need to convert to utf-8 so it can be displayed. | |
273 | */ | |
274 | result = utf16s_to_utf8s( | |
275 | (wchar_t *)acpi_dev->pnp.str_obj->buffer.pointer, | |
276 | acpi_dev->pnp.str_obj->buffer.length, | |
277 | UTF16_LITTLE_ENDIAN, buf, | |
278 | PAGE_SIZE); | |
279 | ||
280 | buf[result++] = '\n'; | |
281 | ||
282 | return result; | |
283 | } | |
284 | static DEVICE_ATTR(description, 0444, description_show, NULL); | |
285 | ||
bb74ac23 YI |
286 | static ssize_t |
287 | acpi_device_sun_show(struct device *dev, struct device_attribute *attr, | |
288 | char *buf) { | |
289 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
290 | ||
291 | return sprintf(buf, "%lu\n", acpi_dev->pnp.sun); | |
292 | } | |
293 | static DEVICE_ATTR(sun, 0444, acpi_device_sun_show, NULL); | |
294 | ||
e49bd2dd | 295 | static int acpi_device_setup_files(struct acpi_device *dev) |
1da177e4 | 296 | { |
d1efe3c3 | 297 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
f883d9db PM |
298 | acpi_status status; |
299 | acpi_handle temp; | |
bb74ac23 | 300 | unsigned long long sun; |
e49bd2dd | 301 | int result = 0; |
1da177e4 LT |
302 | |
303 | /* | |
e49bd2dd | 304 | * Devices gotten from FADT don't have a "path" attribute |
1da177e4 | 305 | */ |
0c526d96 | 306 | if (dev->handle) { |
e49bd2dd | 307 | result = device_create_file(&dev->dev, &dev_attr_path); |
0c526d96 | 308 | if (result) |
e49bd2dd | 309 | goto end; |
1da177e4 LT |
310 | } |
311 | ||
2b2ae7c7 TR |
312 | if (!list_empty(&dev->pnp.ids)) { |
313 | result = device_create_file(&dev->dev, &dev_attr_hid); | |
314 | if (result) | |
315 | goto end; | |
1da177e4 | 316 | |
2b2ae7c7 TR |
317 | result = device_create_file(&dev->dev, &dev_attr_modalias); |
318 | if (result) | |
319 | goto end; | |
320 | } | |
29b71a1c | 321 | |
d1efe3c3 LO |
322 | /* |
323 | * If device has _STR, 'description' file is created | |
324 | */ | |
325 | status = acpi_get_handle(dev->handle, "_STR", &temp); | |
326 | if (ACPI_SUCCESS(status)) { | |
327 | status = acpi_evaluate_object(dev->handle, "_STR", | |
328 | NULL, &buffer); | |
329 | if (ACPI_FAILURE(status)) | |
330 | buffer.pointer = NULL; | |
331 | dev->pnp.str_obj = buffer.pointer; | |
332 | result = device_create_file(&dev->dev, &dev_attr_description); | |
333 | if (result) | |
334 | goto end; | |
335 | } | |
336 | ||
923d4a45 LZ |
337 | if (dev->flags.bus_address) |
338 | result = device_create_file(&dev->dev, &dev_attr_adr); | |
339 | if (dev->pnp.unique_id) | |
340 | result = device_create_file(&dev->dev, &dev_attr_uid); | |
341 | ||
bb74ac23 YI |
342 | status = acpi_evaluate_integer(dev->handle, "_SUN", NULL, &sun); |
343 | if (ACPI_SUCCESS(status)) { | |
344 | dev->pnp.sun = (unsigned long)sun; | |
345 | result = device_create_file(&dev->dev, &dev_attr_sun); | |
346 | if (result) | |
347 | goto end; | |
348 | } else { | |
349 | dev->pnp.sun = (unsigned long)-1; | |
350 | } | |
351 | ||
e49bd2dd ZR |
352 | /* |
353 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
354 | * hot-removal function from userland. | |
355 | */ | |
f883d9db PM |
356 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); |
357 | if (ACPI_SUCCESS(status)) | |
e49bd2dd | 358 | result = device_create_file(&dev->dev, &dev_attr_eject); |
0c526d96 | 359 | end: |
e49bd2dd | 360 | return result; |
1da177e4 LT |
361 | } |
362 | ||
f883d9db | 363 | static void acpi_device_remove_files(struct acpi_device *dev) |
1da177e4 | 364 | { |
f883d9db PM |
365 | acpi_status status; |
366 | acpi_handle temp; | |
1da177e4 | 367 | |
f883d9db | 368 | /* |
d1efe3c3 LO |
369 | * If device has _STR, remove 'description' file |
370 | */ | |
371 | status = acpi_get_handle(dev->handle, "_STR", &temp); | |
372 | if (ACPI_SUCCESS(status)) { | |
373 | kfree(dev->pnp.str_obj); | |
374 | device_remove_file(&dev->dev, &dev_attr_description); | |
375 | } | |
376 | /* | |
377 | * If device has _EJ0, remove 'eject' file. | |
f883d9db PM |
378 | */ |
379 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); | |
380 | if (ACPI_SUCCESS(status)) | |
381 | device_remove_file(&dev->dev, &dev_attr_eject); | |
1da177e4 | 382 | |
bb74ac23 YI |
383 | status = acpi_get_handle(dev->handle, "_SUN", &temp); |
384 | if (ACPI_SUCCESS(status)) | |
385 | device_remove_file(&dev->dev, &dev_attr_sun); | |
386 | ||
923d4a45 LZ |
387 | if (dev->pnp.unique_id) |
388 | device_remove_file(&dev->dev, &dev_attr_uid); | |
389 | if (dev->flags.bus_address) | |
390 | device_remove_file(&dev->dev, &dev_attr_adr); | |
1131b938 BH |
391 | device_remove_file(&dev->dev, &dev_attr_modalias); |
392 | device_remove_file(&dev->dev, &dev_attr_hid); | |
0c526d96 | 393 | if (dev->handle) |
e49bd2dd | 394 | device_remove_file(&dev->dev, &dev_attr_path); |
1da177e4 | 395 | } |
1da177e4 | 396 | /* -------------------------------------------------------------------------- |
9e89dde2 | 397 | ACPI Bus operations |
1da177e4 | 398 | -------------------------------------------------------------------------- */ |
29b71a1c TR |
399 | |
400 | int acpi_match_device_ids(struct acpi_device *device, | |
401 | const struct acpi_device_id *ids) | |
402 | { | |
403 | const struct acpi_device_id *id; | |
7f47fa6c | 404 | struct acpi_hardware_id *hwid; |
29b71a1c | 405 | |
39a0ad87 ZY |
406 | /* |
407 | * If the device is not present, it is unnecessary to load device | |
408 | * driver for it. | |
409 | */ | |
410 | if (!device->status.present) | |
411 | return -ENODEV; | |
412 | ||
7f47fa6c BH |
413 | for (id = ids; id->id[0]; id++) |
414 | list_for_each_entry(hwid, &device->pnp.ids, list) | |
415 | if (!strcmp((char *) id->id, hwid->id)) | |
29b71a1c | 416 | return 0; |
29b71a1c TR |
417 | |
418 | return -ENOENT; | |
419 | } | |
420 | EXPORT_SYMBOL(acpi_match_device_ids); | |
421 | ||
7f47fa6c BH |
422 | static void acpi_free_ids(struct acpi_device *device) |
423 | { | |
424 | struct acpi_hardware_id *id, *tmp; | |
425 | ||
426 | list_for_each_entry_safe(id, tmp, &device->pnp.ids, list) { | |
427 | kfree(id->id); | |
428 | kfree(id); | |
429 | } | |
430 | } | |
431 | ||
1890a97a | 432 | static void acpi_device_release(struct device *dev) |
1da177e4 | 433 | { |
1890a97a | 434 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 435 | |
7f47fa6c | 436 | acpi_free_ids(acpi_dev); |
ccf78040 | 437 | kfree(acpi_dev->pnp.unique_id); |
1890a97a | 438 | kfree(acpi_dev); |
1da177e4 LT |
439 | } |
440 | ||
5d9464a4 | 441 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 442 | { |
5d9464a4 PM |
443 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
444 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
1da177e4 | 445 | |
29b71a1c | 446 | return !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
5d9464a4 | 447 | } |
1da177e4 | 448 | |
7eff2e7a | 449 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 | 450 | { |
5d9464a4 | 451 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
7eff2e7a | 452 | int len; |
5d9464a4 | 453 | |
2b2ae7c7 TR |
454 | if (list_empty(&acpi_dev->pnp.ids)) |
455 | return 0; | |
456 | ||
7eff2e7a KS |
457 | if (add_uevent_var(env, "MODALIAS=")) |
458 | return -ENOMEM; | |
459 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], | |
460 | sizeof(env->buf) - env->buflen); | |
461 | if (len >= (sizeof(env->buf) - env->buflen)) | |
462 | return -ENOMEM; | |
463 | env->buflen += len; | |
9e89dde2 | 464 | return 0; |
1da177e4 LT |
465 | } |
466 | ||
46ec8598 BH |
467 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
468 | { | |
469 | struct acpi_device *device = data; | |
470 | ||
471 | device->driver->ops.notify(device, event); | |
472 | } | |
473 | ||
474 | static acpi_status acpi_device_notify_fixed(void *data) | |
475 | { | |
476 | struct acpi_device *device = data; | |
477 | ||
53de5356 BH |
478 | /* Fixed hardware devices have no handles */ |
479 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); | |
46ec8598 BH |
480 | return AE_OK; |
481 | } | |
482 | ||
483 | static int acpi_device_install_notify_handler(struct acpi_device *device) | |
484 | { | |
485 | acpi_status status; | |
46ec8598 | 486 | |
ccba2a36 | 487 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
488 | status = |
489 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
490 | acpi_device_notify_fixed, | |
491 | device); | |
ccba2a36 | 492 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
493 | status = |
494 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
495 | acpi_device_notify_fixed, | |
496 | device); | |
497 | else | |
498 | status = acpi_install_notify_handler(device->handle, | |
499 | ACPI_DEVICE_NOTIFY, | |
500 | acpi_device_notify, | |
501 | device); | |
502 | ||
503 | if (ACPI_FAILURE(status)) | |
504 | return -EINVAL; | |
505 | return 0; | |
506 | } | |
507 | ||
508 | static void acpi_device_remove_notify_handler(struct acpi_device *device) | |
509 | { | |
ccba2a36 | 510 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
511 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, |
512 | acpi_device_notify_fixed); | |
ccba2a36 | 513 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
514 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, |
515 | acpi_device_notify_fixed); | |
516 | else | |
517 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, | |
518 | acpi_device_notify); | |
519 | } | |
520 | ||
5d9464a4 PM |
521 | static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *); |
522 | static int acpi_start_single_object(struct acpi_device *); | |
523 | static int acpi_device_probe(struct device * dev) | |
1da177e4 | 524 | { |
5d9464a4 PM |
525 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
526 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
527 | int ret; | |
528 | ||
529 | ret = acpi_bus_driver_init(acpi_dev, acpi_drv); | |
530 | if (!ret) { | |
c4168bff LS |
531 | if (acpi_dev->bus_ops.acpi_op_start) |
532 | acpi_start_single_object(acpi_dev); | |
46ec8598 BH |
533 | |
534 | if (acpi_drv->ops.notify) { | |
535 | ret = acpi_device_install_notify_handler(acpi_dev); | |
536 | if (ret) { | |
46ec8598 BH |
537 | if (acpi_drv->ops.remove) |
538 | acpi_drv->ops.remove(acpi_dev, | |
539 | acpi_dev->removal_type); | |
540 | return ret; | |
541 | } | |
542 | } | |
543 | ||
5d9464a4 PM |
544 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
545 | "Found driver [%s] for device [%s]\n", | |
546 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
547 | get_device(dev); | |
548 | } | |
549 | return ret; | |
550 | } | |
1da177e4 | 551 | |
5d9464a4 PM |
552 | static int acpi_device_remove(struct device * dev) |
553 | { | |
554 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
555 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
556 | ||
557 | if (acpi_drv) { | |
46ec8598 BH |
558 | if (acpi_drv->ops.notify) |
559 | acpi_device_remove_notify_handler(acpi_dev); | |
5d9464a4 | 560 | if (acpi_drv->ops.remove) |
96333578 | 561 | acpi_drv->ops.remove(acpi_dev, acpi_dev->removal_type); |
1da177e4 | 562 | } |
5d9464a4 | 563 | acpi_dev->driver = NULL; |
db89b4f0 | 564 | acpi_dev->driver_data = NULL; |
1da177e4 | 565 | |
5d9464a4 | 566 | put_device(dev); |
9e89dde2 ZR |
567 | return 0; |
568 | } | |
1da177e4 | 569 | |
55955aad | 570 | struct bus_type acpi_bus_type = { |
9e89dde2 | 571 | .name = "acpi", |
5d9464a4 PM |
572 | .match = acpi_bus_match, |
573 | .probe = acpi_device_probe, | |
574 | .remove = acpi_device_remove, | |
575 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
576 | }; |
577 | ||
66b7ed40 | 578 | static int acpi_device_register(struct acpi_device *device) |
1da177e4 | 579 | { |
4be44fcd | 580 | int result; |
e49bd2dd ZR |
581 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
582 | int found = 0; | |
66b7ed40 | 583 | |
9e89dde2 ZR |
584 | /* |
585 | * Linkage | |
586 | * ------- | |
587 | * Link this device to its parent and siblings. | |
588 | */ | |
589 | INIT_LIST_HEAD(&device->children); | |
590 | INIT_LIST_HEAD(&device->node); | |
9e89dde2 | 591 | INIT_LIST_HEAD(&device->wakeup_list); |
1033f904 LT |
592 | INIT_LIST_HEAD(&device->physical_node_list); |
593 | mutex_init(&device->physical_node_lock); | |
1da177e4 | 594 | |
e49bd2dd ZR |
595 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
596 | if (!new_bus_id) { | |
597 | printk(KERN_ERR PREFIX "Memory allocation error\n"); | |
598 | return -ENOMEM; | |
1da177e4 | 599 | } |
e49bd2dd | 600 | |
9090589d | 601 | mutex_lock(&acpi_device_lock); |
e49bd2dd ZR |
602 | /* |
603 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
604 | * If failed, create one and link it into acpi_bus_id_list | |
605 | */ | |
606 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
1131b938 BH |
607 | if (!strcmp(acpi_device_bus_id->bus_id, |
608 | acpi_device_hid(device))) { | |
609 | acpi_device_bus_id->instance_no++; | |
e49bd2dd ZR |
610 | found = 1; |
611 | kfree(new_bus_id); | |
612 | break; | |
613 | } | |
1da177e4 | 614 | } |
0c526d96 | 615 | if (!found) { |
e49bd2dd | 616 | acpi_device_bus_id = new_bus_id; |
1131b938 | 617 | strcpy(acpi_device_bus_id->bus_id, acpi_device_hid(device)); |
e49bd2dd ZR |
618 | acpi_device_bus_id->instance_no = 0; |
619 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 620 | } |
0794469d | 621 | dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 622 | |
33b57150 | 623 | if (device->parent) |
9e89dde2 | 624 | list_add_tail(&device->node, &device->parent->children); |
33b57150 | 625 | |
9e89dde2 ZR |
626 | if (device->wakeup.flags.valid) |
627 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
9090589d | 628 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 629 | |
1890a97a | 630 | if (device->parent) |
66b7ed40 | 631 | device->dev.parent = &device->parent->dev; |
1890a97a | 632 | device->dev.bus = &acpi_bus_type; |
1890a97a | 633 | device->dev.release = &acpi_device_release; |
8b12b922 | 634 | result = device_register(&device->dev); |
0c526d96 | 635 | if (result) { |
8b12b922 | 636 | dev_err(&device->dev, "Error registering device\n"); |
e49bd2dd | 637 | goto end; |
1da177e4 | 638 | } |
1da177e4 | 639 | |
e49bd2dd | 640 | result = acpi_device_setup_files(device); |
0c526d96 | 641 | if (result) |
0794469d KS |
642 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
643 | dev_name(&device->dev)); | |
1da177e4 | 644 | |
96333578 | 645 | device->removal_type = ACPI_BUS_REMOVAL_NORMAL; |
1da177e4 | 646 | return 0; |
0c526d96 | 647 | end: |
9090589d | 648 | mutex_lock(&acpi_device_lock); |
33b57150 | 649 | if (device->parent) |
e49bd2dd | 650 | list_del(&device->node); |
e49bd2dd | 651 | list_del(&device->wakeup_list); |
9090589d | 652 | mutex_unlock(&acpi_device_lock); |
e49bd2dd | 653 | return result; |
1da177e4 LT |
654 | } |
655 | ||
9e89dde2 ZR |
656 | static void acpi_device_unregister(struct acpi_device *device, int type) |
657 | { | |
9090589d | 658 | mutex_lock(&acpi_device_lock); |
33b57150 | 659 | if (device->parent) |
9e89dde2 | 660 | list_del(&device->node); |
1da177e4 | 661 | |
9e89dde2 | 662 | list_del(&device->wakeup_list); |
9090589d | 663 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 664 | |
9e89dde2 | 665 | acpi_detach_data(device->handle, acpi_bus_data_handler); |
1890a97a | 666 | |
f883d9db | 667 | acpi_device_remove_files(device); |
1890a97a | 668 | device_unregister(&device->dev); |
1da177e4 LT |
669 | } |
670 | ||
9e89dde2 ZR |
671 | /* -------------------------------------------------------------------------- |
672 | Driver Management | |
673 | -------------------------------------------------------------------------- */ | |
1da177e4 | 674 | /** |
d758a8fa RD |
675 | * acpi_bus_driver_init - add a device to a driver |
676 | * @device: the device to add and initialize | |
677 | * @driver: driver for the device | |
678 | * | |
0c526d96 | 679 | * Used to initialize a device via its device driver. Called whenever a |
1890a97a | 680 | * driver is bound to a device. Invokes the driver's add() ops. |
1da177e4 LT |
681 | */ |
682 | static int | |
4be44fcd | 683 | acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) |
1da177e4 | 684 | { |
4be44fcd | 685 | int result = 0; |
1da177e4 | 686 | |
1da177e4 | 687 | if (!device || !driver) |
d550d98d | 688 | return -EINVAL; |
1da177e4 LT |
689 | |
690 | if (!driver->ops.add) | |
d550d98d | 691 | return -ENOSYS; |
1da177e4 LT |
692 | |
693 | result = driver->ops.add(device); | |
694 | if (result) { | |
695 | device->driver = NULL; | |
db89b4f0 | 696 | device->driver_data = NULL; |
d550d98d | 697 | return result; |
1da177e4 LT |
698 | } |
699 | ||
700 | device->driver = driver; | |
701 | ||
702 | /* | |
703 | * TBD - Configuration Management: Assign resources to device based | |
704 | * upon possible configuration and currently allocated resources. | |
705 | */ | |
706 | ||
4be44fcd LB |
707 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
708 | "Driver successfully bound to device\n")); | |
d550d98d | 709 | return 0; |
3fb02738 RS |
710 | } |
711 | ||
8713cbef | 712 | static int acpi_start_single_object(struct acpi_device *device) |
3fb02738 RS |
713 | { |
714 | int result = 0; | |
715 | struct acpi_driver *driver; | |
716 | ||
3fb02738 RS |
717 | |
718 | if (!(driver = device->driver)) | |
d550d98d | 719 | return 0; |
3fb02738 | 720 | |
1da177e4 LT |
721 | if (driver->ops.start) { |
722 | result = driver->ops.start(device); | |
723 | if (result && driver->ops.remove) | |
724 | driver->ops.remove(device, ACPI_BUS_REMOVAL_NORMAL); | |
1da177e4 LT |
725 | } |
726 | ||
d550d98d | 727 | return result; |
1da177e4 LT |
728 | } |
729 | ||
9e89dde2 ZR |
730 | /** |
731 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
732 | * @driver: driver being registered | |
733 | * | |
734 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
735 | * devices that match the driver's criteria and binds. Returns zero for | |
736 | * success or a negative error status for failure. | |
737 | */ | |
738 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
1da177e4 | 739 | { |
1890a97a | 740 | int ret; |
1da177e4 | 741 | |
9e89dde2 ZR |
742 | if (acpi_disabled) |
743 | return -ENODEV; | |
1890a97a PM |
744 | driver->drv.name = driver->name; |
745 | driver->drv.bus = &acpi_bus_type; | |
746 | driver->drv.owner = driver->owner; | |
1da177e4 | 747 | |
1890a97a PM |
748 | ret = driver_register(&driver->drv); |
749 | return ret; | |
9e89dde2 | 750 | } |
1da177e4 | 751 | |
9e89dde2 ZR |
752 | EXPORT_SYMBOL(acpi_bus_register_driver); |
753 | ||
754 | /** | |
755 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus | |
756 | * @driver: driver to unregister | |
757 | * | |
758 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
759 | * devices that match the driver's criteria and unbinds. | |
760 | */ | |
761 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
762 | { | |
1890a97a | 763 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
764 | } |
765 | ||
766 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
767 | ||
9e89dde2 ZR |
768 | /* -------------------------------------------------------------------------- |
769 | Device Enumeration | |
770 | -------------------------------------------------------------------------- */ | |
5c478f49 BH |
771 | static struct acpi_device *acpi_bus_get_parent(acpi_handle handle) |
772 | { | |
773 | acpi_status status; | |
774 | int ret; | |
775 | struct acpi_device *device; | |
776 | ||
777 | /* | |
778 | * Fixed hardware devices do not appear in the namespace and do not | |
779 | * have handles, but we fabricate acpi_devices for them, so we have | |
780 | * to deal with them specially. | |
781 | */ | |
782 | if (handle == NULL) | |
783 | return acpi_root; | |
784 | ||
785 | do { | |
786 | status = acpi_get_parent(handle, &handle); | |
787 | if (status == AE_NULL_ENTRY) | |
788 | return NULL; | |
789 | if (ACPI_FAILURE(status)) | |
790 | return acpi_root; | |
791 | ||
792 | ret = acpi_bus_get_device(handle, &device); | |
793 | if (ret == 0) | |
794 | return device; | |
795 | } while (1); | |
796 | } | |
797 | ||
9e89dde2 ZR |
798 | acpi_status |
799 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
800 | { | |
801 | acpi_status status; | |
802 | acpi_handle tmp; | |
803 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
804 | union acpi_object *obj; | |
805 | ||
806 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
807 | if (ACPI_FAILURE(status)) | |
808 | return status; | |
809 | ||
810 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
811 | if (ACPI_SUCCESS(status)) { | |
812 | obj = buffer.pointer; | |
3b5fee59 HM |
813 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
814 | ejd); | |
9e89dde2 ZR |
815 | kfree(buffer.pointer); |
816 | } | |
817 | return status; | |
818 | } | |
819 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
820 | ||
8e4319c4 | 821 | void acpi_bus_data_handler(acpi_handle handle, void *context) |
9e89dde2 ZR |
822 | { |
823 | ||
824 | /* TBD */ | |
825 | ||
826 | return; | |
827 | } | |
828 | ||
9e89dde2 ZR |
829 | static int acpi_bus_get_perf_flags(struct acpi_device *device) |
830 | { | |
831 | device->performance.state = ACPI_STATE_UNKNOWN; | |
832 | return 0; | |
833 | } | |
834 | ||
835 | static acpi_status | |
b581a7f9 RW |
836 | acpi_bus_extract_wakeup_device_power_package(acpi_handle handle, |
837 | struct acpi_device_wakeup *wakeup) | |
9e89dde2 | 838 | { |
b581a7f9 RW |
839 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
840 | union acpi_object *package = NULL; | |
9e89dde2 | 841 | union acpi_object *element = NULL; |
b581a7f9 RW |
842 | acpi_status status; |
843 | int i = 0; | |
9e89dde2 | 844 | |
b581a7f9 | 845 | if (!wakeup) |
9e89dde2 ZR |
846 | return AE_BAD_PARAMETER; |
847 | ||
b581a7f9 RW |
848 | /* _PRW */ |
849 | status = acpi_evaluate_object(handle, "_PRW", NULL, &buffer); | |
850 | if (ACPI_FAILURE(status)) { | |
851 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
852 | return status; | |
853 | } | |
854 | ||
855 | package = (union acpi_object *)buffer.pointer; | |
856 | ||
857 | if (!package || (package->package.count < 2)) { | |
858 | status = AE_BAD_DATA; | |
859 | goto out; | |
860 | } | |
861 | ||
9e89dde2 | 862 | element = &(package->package.elements[0]); |
b581a7f9 RW |
863 | if (!element) { |
864 | status = AE_BAD_DATA; | |
865 | goto out; | |
866 | } | |
9e89dde2 ZR |
867 | if (element->type == ACPI_TYPE_PACKAGE) { |
868 | if ((element->package.count < 2) || | |
869 | (element->package.elements[0].type != | |
870 | ACPI_TYPE_LOCAL_REFERENCE) | |
b581a7f9 RW |
871 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) { |
872 | status = AE_BAD_DATA; | |
873 | goto out; | |
874 | } | |
875 | wakeup->gpe_device = | |
9e89dde2 | 876 | element->package.elements[0].reference.handle; |
b581a7f9 | 877 | wakeup->gpe_number = |
9e89dde2 ZR |
878 | (u32) element->package.elements[1].integer.value; |
879 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
b581a7f9 RW |
880 | wakeup->gpe_device = NULL; |
881 | wakeup->gpe_number = element->integer.value; | |
882 | } else { | |
883 | status = AE_BAD_DATA; | |
884 | goto out; | |
885 | } | |
9e89dde2 ZR |
886 | |
887 | element = &(package->package.elements[1]); | |
888 | if (element->type != ACPI_TYPE_INTEGER) { | |
b581a7f9 RW |
889 | status = AE_BAD_DATA; |
890 | goto out; | |
9e89dde2 | 891 | } |
b581a7f9 | 892 | wakeup->sleep_state = element->integer.value; |
9e89dde2 ZR |
893 | |
894 | if ((package->package.count - 2) > ACPI_MAX_HANDLES) { | |
b581a7f9 RW |
895 | status = AE_NO_MEMORY; |
896 | goto out; | |
9e89dde2 | 897 | } |
b581a7f9 RW |
898 | wakeup->resources.count = package->package.count - 2; |
899 | for (i = 0; i < wakeup->resources.count; i++) { | |
9e89dde2 | 900 | element = &(package->package.elements[i + 2]); |
b581a7f9 RW |
901 | if (element->type != ACPI_TYPE_LOCAL_REFERENCE) { |
902 | status = AE_BAD_DATA; | |
903 | goto out; | |
904 | } | |
9e89dde2 | 905 | |
b581a7f9 | 906 | wakeup->resources.handles[i] = element->reference.handle; |
1da177e4 | 907 | } |
9e89dde2 | 908 | |
bba63a29 | 909 | acpi_setup_gpe_for_wake(handle, wakeup->gpe_device, wakeup->gpe_number); |
9874647b | 910 | |
b581a7f9 RW |
911 | out: |
912 | kfree(buffer.pointer); | |
913 | ||
914 | return status; | |
1da177e4 LT |
915 | } |
916 | ||
f517709d | 917 | static void acpi_bus_set_run_wake_flags(struct acpi_device *device) |
1da177e4 | 918 | { |
29b71a1c TR |
919 | struct acpi_device_id button_device_ids[] = { |
920 | {"PNP0C0D", 0}, | |
921 | {"PNP0C0C", 0}, | |
922 | {"PNP0C0E", 0}, | |
923 | {"", 0}, | |
924 | }; | |
f517709d RW |
925 | acpi_status status; |
926 | acpi_event_status event_status; | |
927 | ||
b67ea761 | 928 | device->wakeup.flags.notifier_present = 0; |
f517709d RW |
929 | |
930 | /* Power button, Lid switch always enable wakeup */ | |
931 | if (!acpi_match_device_ids(device, button_device_ids)) { | |
932 | device->wakeup.flags.run_wake = 1; | |
f2b56bc8 | 933 | device_set_wakeup_capable(&device->dev, true); |
f517709d RW |
934 | return; |
935 | } | |
936 | ||
e8e18c95 RW |
937 | status = acpi_get_gpe_status(device->wakeup.gpe_device, |
938 | device->wakeup.gpe_number, | |
939 | &event_status); | |
f517709d RW |
940 | if (status == AE_OK) |
941 | device->wakeup.flags.run_wake = | |
942 | !!(event_status & ACPI_EVENT_FLAG_HANDLE); | |
943 | } | |
944 | ||
d57d09a4 | 945 | static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
f517709d | 946 | { |
d57d09a4 | 947 | acpi_handle temp; |
f517709d | 948 | acpi_status status = 0; |
f517709d | 949 | int psw_error; |
29b71a1c | 950 | |
d57d09a4 RW |
951 | /* Presence of _PRW indicates wake capable */ |
952 | status = acpi_get_handle(device->handle, "_PRW", &temp); | |
953 | if (ACPI_FAILURE(status)) | |
954 | return; | |
955 | ||
b581a7f9 RW |
956 | status = acpi_bus_extract_wakeup_device_power_package(device->handle, |
957 | &device->wakeup); | |
9e89dde2 ZR |
958 | if (ACPI_FAILURE(status)) { |
959 | ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package")); | |
d57d09a4 | 960 | return; |
9e89dde2 | 961 | } |
1da177e4 | 962 | |
9e89dde2 | 963 | device->wakeup.flags.valid = 1; |
9b83ccd2 | 964 | device->wakeup.prepare_count = 0; |
f517709d | 965 | acpi_bus_set_run_wake_flags(device); |
729b2bdb ZY |
966 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
967 | * system for the ACPI device with the _PRW object. | |
968 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. | |
969 | * So it is necessary to call _DSW object first. Only when it is not | |
970 | * present will the _PSW object used. | |
971 | */ | |
77e76609 RW |
972 | psw_error = acpi_device_sleep_wake(device, 0, 0, 0); |
973 | if (psw_error) | |
974 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
975 | "error in _DSW or _PSW evaluation\n")); | |
1da177e4 | 976 | } |
1da177e4 | 977 | |
bf325f95 RW |
978 | static void acpi_bus_add_power_resource(acpi_handle handle); |
979 | ||
9e89dde2 | 980 | static int acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 981 | { |
9e89dde2 ZR |
982 | acpi_status status = 0; |
983 | acpi_handle handle = NULL; | |
984 | u32 i = 0; | |
1a365616 | 985 | |
4be44fcd | 986 | |
9e89dde2 ZR |
987 | /* |
988 | * Power Management Flags | |
989 | */ | |
990 | status = acpi_get_handle(device->handle, "_PSC", &handle); | |
991 | if (ACPI_SUCCESS(status)) | |
992 | device->power.flags.explicit_get = 1; | |
993 | status = acpi_get_handle(device->handle, "_IRC", &handle); | |
994 | if (ACPI_SUCCESS(status)) | |
995 | device->power.flags.inrush_current = 1; | |
1da177e4 | 996 | |
9e89dde2 ZR |
997 | /* |
998 | * Enumerate supported power management states | |
999 | */ | |
1cc0c998 | 1000 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) { |
9e89dde2 ZR |
1001 | struct acpi_device_power_state *ps = &device->power.states[i]; |
1002 | char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' }; | |
1da177e4 | 1003 | |
9e89dde2 ZR |
1004 | /* Evaluate "_PRx" to se if power resources are referenced */ |
1005 | acpi_evaluate_reference(device->handle, object_name, NULL, | |
1006 | &ps->resources); | |
1007 | if (ps->resources.count) { | |
bf325f95 RW |
1008 | int j; |
1009 | ||
9e89dde2 | 1010 | device->power.flags.power_resources = 1; |
bf325f95 RW |
1011 | for (j = 0; j < ps->resources.count; j++) |
1012 | acpi_bus_add_power_resource(ps->resources.handles[j]); | |
1da177e4 | 1013 | } |
1da177e4 | 1014 | |
9e89dde2 ZR |
1015 | /* Evaluate "_PSx" to see if we can do explicit sets */ |
1016 | object_name[2] = 'S'; | |
1017 | status = acpi_get_handle(device->handle, object_name, &handle); | |
37239978 | 1018 | if (ACPI_SUCCESS(status)) |
9e89dde2 | 1019 | ps->flags.explicit_set = 1; |
1da177e4 | 1020 | |
1cc0c998 LM |
1021 | /* |
1022 | * State is valid if there are means to put the device into it. | |
1023 | * D3hot is only valid if _PR3 present. | |
1024 | */ | |
1025 | if (ps->resources.count || | |
1026 | (ps->flags.explicit_set && i < ACPI_STATE_D3_HOT)) | |
9e89dde2 | 1027 | ps->flags.valid = 1; |
1da177e4 | 1028 | |
9e89dde2 ZR |
1029 | ps->power = -1; /* Unknown - driver assigned */ |
1030 | ps->latency = -1; /* Unknown - driver assigned */ | |
1031 | } | |
1da177e4 | 1032 | |
9e89dde2 ZR |
1033 | /* Set defaults for D0 and D3 states (always valid) */ |
1034 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
1035 | device->power.states[ACPI_STATE_D0].power = 100; | |
1036 | device->power.states[ACPI_STATE_D3].flags.valid = 1; | |
1037 | device->power.states[ACPI_STATE_D3].power = 0; | |
c8f7a62c | 1038 | |
5c7dd710 RW |
1039 | /* Set D3cold's explicit_set flag if _PS3 exists. */ |
1040 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set) | |
1041 | device->power.states[ACPI_STATE_D3_COLD].flags.explicit_set = 1; | |
1042 | ||
ade3e7fe | 1043 | acpi_bus_init_power(device); |
c8f7a62c | 1044 | |
9e89dde2 ZR |
1045 | return 0; |
1046 | } | |
c8f7a62c | 1047 | |
4be44fcd | 1048 | static int acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 1049 | { |
4be44fcd LB |
1050 | acpi_status status = AE_OK; |
1051 | acpi_handle temp = NULL; | |
1da177e4 | 1052 | |
1da177e4 LT |
1053 | |
1054 | /* Presence of _STA indicates 'dynamic_status' */ | |
1055 | status = acpi_get_handle(device->handle, "_STA", &temp); | |
1056 | if (ACPI_SUCCESS(status)) | |
1057 | device->flags.dynamic_status = 1; | |
1058 | ||
1da177e4 LT |
1059 | /* Presence of _RMV indicates 'removable' */ |
1060 | status = acpi_get_handle(device->handle, "_RMV", &temp); | |
1061 | if (ACPI_SUCCESS(status)) | |
1062 | device->flags.removable = 1; | |
1063 | ||
1064 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
1065 | status = acpi_get_handle(device->handle, "_EJD", &temp); | |
1066 | if (ACPI_SUCCESS(status)) | |
1067 | device->flags.ejectable = 1; | |
1068 | else { | |
1069 | status = acpi_get_handle(device->handle, "_EJ0", &temp); | |
1070 | if (ACPI_SUCCESS(status)) | |
1071 | device->flags.ejectable = 1; | |
1072 | } | |
1073 | ||
7bed50c5 RW |
1074 | /* Power resources cannot be power manageable. */ |
1075 | if (device->device_type == ACPI_BUS_TYPE_POWER) | |
1076 | return 0; | |
1077 | ||
1da177e4 LT |
1078 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ |
1079 | status = acpi_get_handle(device->handle, "_PS0", &temp); | |
1080 | if (ACPI_FAILURE(status)) | |
1081 | status = acpi_get_handle(device->handle, "_PR0", &temp); | |
1082 | if (ACPI_SUCCESS(status)) | |
1083 | device->flags.power_manageable = 1; | |
1084 | ||
3c5f9be4 | 1085 | /* TBD: Performance management */ |
1da177e4 | 1086 | |
d550d98d | 1087 | return 0; |
1da177e4 LT |
1088 | } |
1089 | ||
c7bcb4e9 | 1090 | static void acpi_device_get_busid(struct acpi_device *device) |
1da177e4 | 1091 | { |
4be44fcd LB |
1092 | char bus_id[5] = { '?', 0 }; |
1093 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
1094 | int i = 0; | |
1da177e4 LT |
1095 | |
1096 | /* | |
1097 | * Bus ID | |
1098 | * ------ | |
1099 | * The device's Bus ID is simply the object name. | |
1100 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
1101 | */ | |
859ac9a4 | 1102 | if (ACPI_IS_ROOT_DEVICE(device)) { |
1da177e4 | 1103 | strcpy(device->pnp.bus_id, "ACPI"); |
859ac9a4 BH |
1104 | return; |
1105 | } | |
1106 | ||
1107 | switch (device->device_type) { | |
1da177e4 LT |
1108 | case ACPI_BUS_TYPE_POWER_BUTTON: |
1109 | strcpy(device->pnp.bus_id, "PWRF"); | |
1110 | break; | |
1111 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
1112 | strcpy(device->pnp.bus_id, "SLPF"); | |
1113 | break; | |
1114 | default: | |
66b7ed40 | 1115 | acpi_get_name(device->handle, ACPI_SINGLE_NAME, &buffer); |
1da177e4 LT |
1116 | /* Clean up trailing underscores (if any) */ |
1117 | for (i = 3; i > 1; i--) { | |
1118 | if (bus_id[i] == '_') | |
1119 | bus_id[i] = '\0'; | |
1120 | else | |
1121 | break; | |
1122 | } | |
1123 | strcpy(device->pnp.bus_id, bus_id); | |
1124 | break; | |
1125 | } | |
1126 | } | |
1127 | ||
54735266 ZR |
1128 | /* |
1129 | * acpi_bay_match - see if a device is an ejectable driver bay | |
1130 | * | |
1131 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
1132 | * then we can safely call it an ejectable drive bay | |
1133 | */ | |
1134 | static int acpi_bay_match(struct acpi_device *device){ | |
1135 | acpi_status status; | |
1136 | acpi_handle handle; | |
1137 | acpi_handle tmp; | |
1138 | acpi_handle phandle; | |
1139 | ||
1140 | handle = device->handle; | |
1141 | ||
1142 | status = acpi_get_handle(handle, "_EJ0", &tmp); | |
1143 | if (ACPI_FAILURE(status)) | |
1144 | return -ENODEV; | |
1145 | ||
1146 | if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || | |
1147 | (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || | |
1148 | (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || | |
1149 | (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) | |
1150 | return 0; | |
1151 | ||
1152 | if (acpi_get_parent(handle, &phandle)) | |
1153 | return -ENODEV; | |
1154 | ||
1155 | if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) || | |
1156 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) || | |
1157 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) || | |
1158 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp)))) | |
1159 | return 0; | |
1160 | ||
1161 | return -ENODEV; | |
1162 | } | |
1163 | ||
3620f2f2 FS |
1164 | /* |
1165 | * acpi_dock_match - see if a device has a _DCK method | |
1166 | */ | |
1167 | static int acpi_dock_match(struct acpi_device *device) | |
1168 | { | |
1169 | acpi_handle tmp; | |
1170 | return acpi_get_handle(device->handle, "_DCK", &tmp); | |
1171 | } | |
1172 | ||
620e112c | 1173 | const char *acpi_device_hid(struct acpi_device *device) |
15b8dd53 | 1174 | { |
7f47fa6c | 1175 | struct acpi_hardware_id *hid; |
15b8dd53 | 1176 | |
2b2ae7c7 TR |
1177 | if (list_empty(&device->pnp.ids)) |
1178 | return dummy_hid; | |
1179 | ||
7f47fa6c BH |
1180 | hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list); |
1181 | return hid->id; | |
1182 | } | |
1183 | EXPORT_SYMBOL(acpi_device_hid); | |
15b8dd53 | 1184 | |
7f47fa6c BH |
1185 | static void acpi_add_id(struct acpi_device *device, const char *dev_id) |
1186 | { | |
1187 | struct acpi_hardware_id *id; | |
15b8dd53 | 1188 | |
7f47fa6c BH |
1189 | id = kmalloc(sizeof(*id), GFP_KERNEL); |
1190 | if (!id) | |
1191 | return; | |
15b8dd53 | 1192 | |
581de59e | 1193 | id->id = kstrdup(dev_id, GFP_KERNEL); |
7f47fa6c BH |
1194 | if (!id->id) { |
1195 | kfree(id); | |
1196 | return; | |
15b8dd53 BM |
1197 | } |
1198 | ||
7f47fa6c | 1199 | list_add_tail(&id->list, &device->pnp.ids); |
15b8dd53 BM |
1200 | } |
1201 | ||
222e82ac DW |
1202 | /* |
1203 | * Old IBM workstations have a DSDT bug wherein the SMBus object | |
1204 | * lacks the SMBUS01 HID and the methods do not have the necessary "_" | |
1205 | * prefix. Work around this. | |
1206 | */ | |
1207 | static int acpi_ibm_smbus_match(struct acpi_device *device) | |
1208 | { | |
1209 | acpi_handle h_dummy; | |
1210 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
1211 | int result; | |
1212 | ||
1213 | if (!dmi_name_in_vendors("IBM")) | |
1214 | return -ENODEV; | |
1215 | ||
1216 | /* Look for SMBS object */ | |
1217 | result = acpi_get_name(device->handle, ACPI_SINGLE_NAME, &path); | |
1218 | if (result) | |
1219 | return result; | |
1220 | ||
1221 | if (strcmp("SMBS", path.pointer)) { | |
1222 | result = -ENODEV; | |
1223 | goto out; | |
1224 | } | |
1225 | ||
1226 | /* Does it have the necessary (but misnamed) methods? */ | |
1227 | result = -ENODEV; | |
1228 | if (ACPI_SUCCESS(acpi_get_handle(device->handle, "SBI", &h_dummy)) && | |
1229 | ACPI_SUCCESS(acpi_get_handle(device->handle, "SBR", &h_dummy)) && | |
1230 | ACPI_SUCCESS(acpi_get_handle(device->handle, "SBW", &h_dummy))) | |
1231 | result = 0; | |
1232 | out: | |
1233 | kfree(path.pointer); | |
1234 | return result; | |
1235 | } | |
1236 | ||
c7bcb4e9 | 1237 | static void acpi_device_set_id(struct acpi_device *device) |
1da177e4 | 1238 | { |
4be44fcd | 1239 | acpi_status status; |
57f3674f BH |
1240 | struct acpi_device_info *info; |
1241 | struct acpica_device_id_list *cid_list; | |
7f47fa6c | 1242 | int i; |
1da177e4 | 1243 | |
c7bcb4e9 | 1244 | switch (device->device_type) { |
1da177e4 | 1245 | case ACPI_BUS_TYPE_DEVICE: |
859ac9a4 | 1246 | if (ACPI_IS_ROOT_DEVICE(device)) { |
57f3674f | 1247 | acpi_add_id(device, ACPI_SYSTEM_HID); |
859ac9a4 BH |
1248 | break; |
1249 | } | |
1250 | ||
66b7ed40 | 1251 | status = acpi_get_object_info(device->handle, &info); |
1da177e4 | 1252 | if (ACPI_FAILURE(status)) { |
96b2dd1f | 1253 | printk(KERN_ERR PREFIX "%s: Error reading device info\n", __func__); |
1da177e4 LT |
1254 | return; |
1255 | } | |
1256 | ||
1da177e4 | 1257 | if (info->valid & ACPI_VALID_HID) |
57f3674f BH |
1258 | acpi_add_id(device, info->hardware_id.string); |
1259 | if (info->valid & ACPI_VALID_CID) { | |
15b8dd53 | 1260 | cid_list = &info->compatible_id_list; |
57f3674f BH |
1261 | for (i = 0; i < cid_list->count; i++) |
1262 | acpi_add_id(device, cid_list->ids[i].string); | |
1263 | } | |
1da177e4 LT |
1264 | if (info->valid & ACPI_VALID_ADR) { |
1265 | device->pnp.bus_address = info->address; | |
1266 | device->flags.bus_address = 1; | |
1267 | } | |
ccf78040 LZ |
1268 | if (info->valid & ACPI_VALID_UID) |
1269 | device->pnp.unique_id = kstrdup(info->unique_id.string, | |
1270 | GFP_KERNEL); | |
ae843332 | 1271 | |
a83893ae BH |
1272 | kfree(info); |
1273 | ||
57f3674f BH |
1274 | /* |
1275 | * Some devices don't reliably have _HIDs & _CIDs, so add | |
1276 | * synthetic HIDs to make sure drivers can find them. | |
1277 | */ | |
c3d6de69 | 1278 | if (acpi_is_video_device(device)) |
57f3674f | 1279 | acpi_add_id(device, ACPI_VIDEO_HID); |
3620f2f2 | 1280 | else if (ACPI_SUCCESS(acpi_bay_match(device))) |
57f3674f | 1281 | acpi_add_id(device, ACPI_BAY_HID); |
3620f2f2 | 1282 | else if (ACPI_SUCCESS(acpi_dock_match(device))) |
57f3674f | 1283 | acpi_add_id(device, ACPI_DOCK_HID); |
222e82ac DW |
1284 | else if (!acpi_ibm_smbus_match(device)) |
1285 | acpi_add_id(device, ACPI_SMBUS_IBM_HID); | |
b7b30de5 BH |
1286 | else if (!acpi_device_hid(device) && |
1287 | ACPI_IS_ROOT_DEVICE(device->parent)) { | |
1288 | acpi_add_id(device, ACPI_BUS_HID); /* \_SB, LNXSYBUS */ | |
1289 | strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME); | |
1290 | strcpy(device->pnp.device_class, ACPI_BUS_CLASS); | |
1291 | } | |
54735266 | 1292 | |
1da177e4 LT |
1293 | break; |
1294 | case ACPI_BUS_TYPE_POWER: | |
57f3674f | 1295 | acpi_add_id(device, ACPI_POWER_HID); |
1da177e4 LT |
1296 | break; |
1297 | case ACPI_BUS_TYPE_PROCESSOR: | |
57f3674f | 1298 | acpi_add_id(device, ACPI_PROCESSOR_OBJECT_HID); |
1da177e4 | 1299 | break; |
1da177e4 | 1300 | case ACPI_BUS_TYPE_THERMAL: |
57f3674f | 1301 | acpi_add_id(device, ACPI_THERMAL_HID); |
1da177e4 LT |
1302 | break; |
1303 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
57f3674f | 1304 | acpi_add_id(device, ACPI_BUTTON_HID_POWERF); |
1da177e4 LT |
1305 | break; |
1306 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
57f3674f | 1307 | acpi_add_id(device, ACPI_BUTTON_HID_SLEEPF); |
1da177e4 LT |
1308 | break; |
1309 | } | |
1da177e4 LT |
1310 | } |
1311 | ||
bc3b0772 | 1312 | static int acpi_device_set_context(struct acpi_device *device) |
1da177e4 | 1313 | { |
bc3b0772 BH |
1314 | acpi_status status; |
1315 | ||
1da177e4 LT |
1316 | /* |
1317 | * Context | |
1318 | * ------- | |
1319 | * Attach this 'struct acpi_device' to the ACPI object. This makes | |
bc3b0772 BH |
1320 | * resolutions from handle->device very efficient. Fixed hardware |
1321 | * devices have no handles, so we skip them. | |
1da177e4 | 1322 | */ |
bc3b0772 BH |
1323 | if (!device->handle) |
1324 | return 0; | |
1da177e4 | 1325 | |
bc3b0772 BH |
1326 | status = acpi_attach_data(device->handle, |
1327 | acpi_bus_data_handler, device); | |
1328 | if (ACPI_SUCCESS(status)) | |
1329 | return 0; | |
1330 | ||
1331 | printk(KERN_ERR PREFIX "Error attaching device data\n"); | |
1332 | return -ENODEV; | |
1da177e4 LT |
1333 | } |
1334 | ||
4be44fcd | 1335 | static int acpi_bus_remove(struct acpi_device *dev, int rmdevice) |
1da177e4 | 1336 | { |
1da177e4 | 1337 | if (!dev) |
d550d98d | 1338 | return -EINVAL; |
1da177e4 | 1339 | |
96333578 | 1340 | dev->removal_type = ACPI_BUS_REMOVAL_EJECT; |
1890a97a | 1341 | device_release_driver(&dev->dev); |
1da177e4 LT |
1342 | |
1343 | if (!rmdevice) | |
d550d98d | 1344 | return 0; |
1da177e4 | 1345 | |
2786f6e3 RZ |
1346 | /* |
1347 | * unbind _ADR-Based Devices when hot removal | |
1348 | */ | |
1da177e4 LT |
1349 | if (dev->flags.bus_address) { |
1350 | if ((dev->parent) && (dev->parent->ops.unbind)) | |
1351 | dev->parent->ops.unbind(dev); | |
1352 | } | |
1da177e4 LT |
1353 | acpi_device_unregister(dev, ACPI_BUS_REMOVAL_EJECT); |
1354 | ||
d550d98d | 1355 | return 0; |
1da177e4 LT |
1356 | } |
1357 | ||
5c478f49 BH |
1358 | static int acpi_add_single_object(struct acpi_device **child, |
1359 | acpi_handle handle, int type, | |
778cbc1d | 1360 | unsigned long long sta, |
5c478f49 | 1361 | struct acpi_bus_ops *ops) |
1da177e4 | 1362 | { |
77c24888 BH |
1363 | int result; |
1364 | struct acpi_device *device; | |
29aaefa6 | 1365 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 1366 | |
36bcbec7 | 1367 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 1368 | if (!device) { |
6468463a | 1369 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 1370 | return -ENOMEM; |
1da177e4 | 1371 | } |
1da177e4 | 1372 | |
7f47fa6c | 1373 | INIT_LIST_HEAD(&device->pnp.ids); |
caaa6efb | 1374 | device->device_type = type; |
1da177e4 | 1375 | device->handle = handle; |
5c478f49 | 1376 | device->parent = acpi_bus_get_parent(handle); |
c4168bff | 1377 | device->bus_ops = *ops; /* workround for not call .start */ |
778cbc1d | 1378 | STRUCT_TO_INT(device->status) = sta; |
c4168bff | 1379 | |
c7bcb4e9 | 1380 | acpi_device_get_busid(device); |
1da177e4 LT |
1381 | |
1382 | /* | |
1383 | * Flags | |
1384 | * ----- | |
778cbc1d BH |
1385 | * Note that we only look for object handles -- cannot evaluate objects |
1386 | * until we know the device is present and properly initialized. | |
1da177e4 LT |
1387 | */ |
1388 | result = acpi_bus_get_flags(device); | |
1389 | if (result) | |
1390 | goto end; | |
1391 | ||
1da177e4 LT |
1392 | /* |
1393 | * Initialize Device | |
1394 | * ----------------- | |
1395 | * TBD: Synch with Core's enumeration/initialization process. | |
1396 | */ | |
c7bcb4e9 | 1397 | acpi_device_set_id(device); |
1da177e4 LT |
1398 | |
1399 | /* | |
1400 | * Power Management | |
1401 | * ---------------- | |
1402 | */ | |
1403 | if (device->flags.power_manageable) { | |
1404 | result = acpi_bus_get_power_flags(device); | |
1405 | if (result) | |
1406 | goto end; | |
1407 | } | |
1408 | ||
4be44fcd | 1409 | /* |
1da177e4 LT |
1410 | * Wakeup device management |
1411 | *----------------------- | |
1412 | */ | |
d57d09a4 | 1413 | acpi_bus_get_wakeup_device_flags(device); |
1da177e4 LT |
1414 | |
1415 | /* | |
1416 | * Performance Management | |
1417 | * ---------------------- | |
1418 | */ | |
1419 | if (device->flags.performance_manageable) { | |
1420 | result = acpi_bus_get_perf_flags(device); | |
1421 | if (result) | |
1422 | goto end; | |
1423 | } | |
1424 | ||
bc3b0772 | 1425 | if ((result = acpi_device_set_context(device))) |
f61f9258 | 1426 | goto end; |
1da177e4 | 1427 | |
66b7ed40 | 1428 | result = acpi_device_register(device); |
1da177e4 LT |
1429 | |
1430 | /* | |
2786f6e3 | 1431 | * Bind _ADR-Based Devices when hot add |
1da177e4 LT |
1432 | */ |
1433 | if (device->flags.bus_address) { | |
1434 | if (device->parent && device->parent->ops.bind) | |
1435 | device->parent->ops.bind(device); | |
1436 | } | |
1437 | ||
0c526d96 | 1438 | end: |
29aaefa6 BH |
1439 | if (!result) { |
1440 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1441 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
1442 | "Adding %s [%s] parent %s\n", dev_name(&device->dev), | |
1443 | (char *) buffer.pointer, | |
1444 | device->parent ? dev_name(&device->parent->dev) : | |
1445 | "(null)")); | |
1446 | kfree(buffer.pointer); | |
1da177e4 | 1447 | *child = device; |
29aaefa6 | 1448 | } else |
718fb0de | 1449 | acpi_device_release(&device->dev); |
1da177e4 | 1450 | |
d550d98d | 1451 | return result; |
1da177e4 | 1452 | } |
1da177e4 | 1453 | |
778cbc1d BH |
1454 | #define ACPI_STA_DEFAULT (ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | \ |
1455 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING) | |
1456 | ||
bf325f95 RW |
1457 | static void acpi_bus_add_power_resource(acpi_handle handle) |
1458 | { | |
1459 | struct acpi_bus_ops ops = { | |
1460 | .acpi_op_add = 1, | |
1461 | .acpi_op_start = 1, | |
1462 | }; | |
1463 | struct acpi_device *device = NULL; | |
1464 | ||
1465 | acpi_bus_get_device(handle, &device); | |
1466 | if (!device) | |
1467 | acpi_add_single_object(&device, handle, ACPI_BUS_TYPE_POWER, | |
1468 | ACPI_STA_DEFAULT, &ops); | |
1469 | } | |
1470 | ||
778cbc1d BH |
1471 | static int acpi_bus_type_and_status(acpi_handle handle, int *type, |
1472 | unsigned long long *sta) | |
1da177e4 | 1473 | { |
778cbc1d BH |
1474 | acpi_status status; |
1475 | acpi_object_type acpi_type; | |
1da177e4 | 1476 | |
778cbc1d | 1477 | status = acpi_get_type(handle, &acpi_type); |
51a85faf | 1478 | if (ACPI_FAILURE(status)) |
778cbc1d | 1479 | return -ENODEV; |
4be44fcd | 1480 | |
778cbc1d | 1481 | switch (acpi_type) { |
51a85faf BH |
1482 | case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */ |
1483 | case ACPI_TYPE_DEVICE: | |
778cbc1d BH |
1484 | *type = ACPI_BUS_TYPE_DEVICE; |
1485 | status = acpi_bus_get_status_handle(handle, sta); | |
1486 | if (ACPI_FAILURE(status)) | |
1487 | return -ENODEV; | |
51a85faf BH |
1488 | break; |
1489 | case ACPI_TYPE_PROCESSOR: | |
778cbc1d BH |
1490 | *type = ACPI_BUS_TYPE_PROCESSOR; |
1491 | status = acpi_bus_get_status_handle(handle, sta); | |
1492 | if (ACPI_FAILURE(status)) | |
1493 | return -ENODEV; | |
51a85faf BH |
1494 | break; |
1495 | case ACPI_TYPE_THERMAL: | |
778cbc1d BH |
1496 | *type = ACPI_BUS_TYPE_THERMAL; |
1497 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1498 | break; |
1499 | case ACPI_TYPE_POWER: | |
778cbc1d BH |
1500 | *type = ACPI_BUS_TYPE_POWER; |
1501 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1502 | break; |
1503 | default: | |
778cbc1d | 1504 | return -ENODEV; |
51a85faf | 1505 | } |
1da177e4 | 1506 | |
778cbc1d BH |
1507 | return 0; |
1508 | } | |
1509 | ||
1510 | static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl, | |
1511 | void *context, void **return_value) | |
1512 | { | |
1513 | struct acpi_bus_ops *ops = context; | |
778cbc1d BH |
1514 | int type; |
1515 | unsigned long long sta; | |
e3b87f8a BH |
1516 | struct acpi_device *device; |
1517 | acpi_status status; | |
778cbc1d BH |
1518 | int result; |
1519 | ||
1520 | result = acpi_bus_type_and_status(handle, &type, &sta); | |
1521 | if (result) | |
1522 | return AE_OK; | |
1523 | ||
1524 | if (!(sta & ACPI_STA_DEVICE_PRESENT) && | |
b581a7f9 | 1525 | !(sta & ACPI_STA_DEVICE_FUNCTIONING)) { |
86e4e20e RW |
1526 | struct acpi_device_wakeup wakeup; |
1527 | acpi_handle temp; | |
1528 | ||
1529 | status = acpi_get_handle(handle, "_PRW", &temp); | |
1530 | if (ACPI_SUCCESS(status)) | |
1531 | acpi_bus_extract_wakeup_device_power_package(handle, | |
1532 | &wakeup); | |
778cbc1d | 1533 | return AE_CTRL_DEPTH; |
b581a7f9 | 1534 | } |
778cbc1d | 1535 | |
e3b87f8a BH |
1536 | /* |
1537 | * We may already have an acpi_device from a previous enumeration. If | |
1538 | * so, we needn't add it again, but we may still have to start it. | |
1539 | */ | |
1540 | device = NULL; | |
1541 | acpi_bus_get_device(handle, &device); | |
1542 | if (ops->acpi_op_add && !device) | |
1543 | acpi_add_single_object(&device, handle, type, sta, ops); | |
1da177e4 | 1544 | |
e3b87f8a | 1545 | if (!device) |
51a85faf | 1546 | return AE_CTRL_DEPTH; |
1da177e4 | 1547 | |
51a85faf BH |
1548 | if (ops->acpi_op_start && !(ops->acpi_op_add)) { |
1549 | status = acpi_start_single_object(device); | |
1da177e4 | 1550 | if (ACPI_FAILURE(status)) |
51a85faf BH |
1551 | return AE_CTRL_DEPTH; |
1552 | } | |
1da177e4 | 1553 | |
51a85faf BH |
1554 | if (!*return_value) |
1555 | *return_value = device; | |
1556 | return AE_OK; | |
1557 | } | |
3fb02738 | 1558 | |
51a85faf BH |
1559 | static int acpi_bus_scan(acpi_handle handle, struct acpi_bus_ops *ops, |
1560 | struct acpi_device **child) | |
1561 | { | |
1562 | acpi_status status; | |
51a85faf | 1563 | void *device = NULL; |
3fb02738 | 1564 | |
51a85faf BH |
1565 | status = acpi_bus_check_add(handle, 0, ops, &device); |
1566 | if (ACPI_SUCCESS(status)) | |
1567 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
2263576c | 1568 | acpi_bus_check_add, NULL, ops, &device); |
1da177e4 | 1569 | |
51a85faf BH |
1570 | if (child) |
1571 | *child = device; | |
7779688f TR |
1572 | |
1573 | if (device) | |
1574 | return 0; | |
1575 | else | |
1576 | return -ENODEV; | |
1da177e4 | 1577 | } |
1da177e4 | 1578 | |
7779688f TR |
1579 | /* |
1580 | * acpi_bus_add and acpi_bus_start | |
1581 | * | |
1582 | * scan a given ACPI tree and (probably recently hot-plugged) | |
1583 | * create and add or starts found devices. | |
1584 | * | |
1585 | * If no devices were found -ENODEV is returned which does not | |
1586 | * mean that this is a real error, there just have been no suitable | |
1587 | * ACPI objects in the table trunk from which the kernel could create | |
1588 | * a device and add/start an appropriate driver. | |
1589 | */ | |
1590 | ||
3fb02738 | 1591 | int |
4be44fcd LB |
1592 | acpi_bus_add(struct acpi_device **child, |
1593 | struct acpi_device *parent, acpi_handle handle, int type) | |
3fb02738 | 1594 | { |
3fb02738 RS |
1595 | struct acpi_bus_ops ops; |
1596 | ||
c4168bff LS |
1597 | memset(&ops, 0, sizeof(ops)); |
1598 | ops.acpi_op_add = 1; | |
3fb02738 | 1599 | |
7779688f | 1600 | return acpi_bus_scan(handle, &ops, child); |
3fb02738 RS |
1601 | } |
1602 | EXPORT_SYMBOL(acpi_bus_add); | |
1603 | ||
4be44fcd | 1604 | int acpi_bus_start(struct acpi_device *device) |
3fb02738 | 1605 | { |
3fb02738 | 1606 | struct acpi_bus_ops ops; |
a2100801 | 1607 | int result; |
3fb02738 | 1608 | |
d2f6650a TR |
1609 | if (!device) |
1610 | return -EINVAL; | |
1611 | ||
8e029bf0 BH |
1612 | memset(&ops, 0, sizeof(ops)); |
1613 | ops.acpi_op_start = 1; | |
3fb02738 | 1614 | |
a2100801 RW |
1615 | result = acpi_bus_scan(device->handle, &ops, NULL); |
1616 | ||
3a37898d | 1617 | acpi_update_all_gpes(); |
a2100801 RW |
1618 | |
1619 | return result; | |
3fb02738 RS |
1620 | } |
1621 | EXPORT_SYMBOL(acpi_bus_start); | |
1da177e4 | 1622 | |
ceaba663 | 1623 | int acpi_bus_trim(struct acpi_device *start, int rmdevice) |
1da177e4 | 1624 | { |
4be44fcd LB |
1625 | acpi_status status; |
1626 | struct acpi_device *parent, *child; | |
1627 | acpi_handle phandle, chandle; | |
1628 | acpi_object_type type; | |
1629 | u32 level = 1; | |
1630 | int err = 0; | |
1631 | ||
1632 | parent = start; | |
1da177e4 LT |
1633 | phandle = start->handle; |
1634 | child = chandle = NULL; | |
1635 | ||
1636 | while ((level > 0) && parent && (!err)) { | |
1637 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, | |
4be44fcd | 1638 | chandle, &chandle); |
1da177e4 LT |
1639 | |
1640 | /* | |
1641 | * If this scope is exhausted then move our way back up. | |
1642 | */ | |
1643 | if (ACPI_FAILURE(status)) { | |
1644 | level--; | |
1645 | chandle = phandle; | |
1646 | acpi_get_parent(phandle, &phandle); | |
1647 | child = parent; | |
1648 | parent = parent->parent; | |
1649 | ||
1650 | if (level == 0) | |
1651 | err = acpi_bus_remove(child, rmdevice); | |
1652 | else | |
1653 | err = acpi_bus_remove(child, 1); | |
1654 | ||
1655 | continue; | |
1656 | } | |
1657 | ||
1658 | status = acpi_get_type(chandle, &type); | |
1659 | if (ACPI_FAILURE(status)) { | |
1660 | continue; | |
1661 | } | |
1662 | /* | |
1663 | * If there is a device corresponding to chandle then | |
1664 | * parse it (depth-first). | |
1665 | */ | |
1666 | if (acpi_bus_get_device(chandle, &child) == 0) { | |
1667 | level++; | |
1668 | phandle = chandle; | |
1669 | chandle = NULL; | |
1670 | parent = child; | |
1671 | } | |
1672 | continue; | |
1673 | } | |
1674 | return err; | |
1675 | } | |
ceaba663 KA |
1676 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
1677 | ||
e8b945c9 | 1678 | static int acpi_bus_scan_fixed(void) |
1da177e4 | 1679 | { |
4be44fcd LB |
1680 | int result = 0; |
1681 | struct acpi_device *device = NULL; | |
c4168bff | 1682 | struct acpi_bus_ops ops; |
1da177e4 | 1683 | |
c4168bff LS |
1684 | memset(&ops, 0, sizeof(ops)); |
1685 | ops.acpi_op_add = 1; | |
1686 | ops.acpi_op_start = 1; | |
1687 | ||
1da177e4 LT |
1688 | /* |
1689 | * Enumerate all fixed-feature devices. | |
1690 | */ | |
cee324b1 | 1691 | if ((acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON) == 0) { |
5c478f49 | 1692 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1693 | ACPI_BUS_TYPE_POWER_BUTTON, |
778cbc1d | 1694 | ACPI_STA_DEFAULT, |
c4168bff | 1695 | &ops); |
c10d7a13 | 1696 | device_init_wakeup(&device->dev, true); |
3fb02738 | 1697 | } |
1da177e4 | 1698 | |
cee324b1 | 1699 | if ((acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON) == 0) { |
5c478f49 | 1700 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1701 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
778cbc1d | 1702 | ACPI_STA_DEFAULT, |
c4168bff | 1703 | &ops); |
3fb02738 | 1704 | } |
1da177e4 | 1705 | |
d550d98d | 1706 | return result; |
1da177e4 LT |
1707 | } |
1708 | ||
e747f274 | 1709 | int __init acpi_scan_init(void) |
1da177e4 LT |
1710 | { |
1711 | int result; | |
3fb02738 | 1712 | struct acpi_bus_ops ops; |
1da177e4 | 1713 | |
c4168bff LS |
1714 | memset(&ops, 0, sizeof(ops)); |
1715 | ops.acpi_op_add = 1; | |
1716 | ops.acpi_op_start = 1; | |
1da177e4 | 1717 | |
5b327265 PM |
1718 | result = bus_register(&acpi_bus_type); |
1719 | if (result) { | |
1720 | /* We don't want to quit even if we failed to add suspend/resume */ | |
1721 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
1722 | } | |
1723 | ||
97d9a9e9 RW |
1724 | acpi_power_init(); |
1725 | ||
1da177e4 LT |
1726 | /* |
1727 | * Enumerate devices in the ACPI namespace. | |
1728 | */ | |
51a85faf | 1729 | result = acpi_bus_scan(ACPI_ROOT_OBJECT, &ops, &acpi_root); |
c04209a7 | 1730 | |
c4168bff | 1731 | if (!result) |
adc08e20 | 1732 | result = acpi_bus_scan_fixed(); |
1da177e4 LT |
1733 | |
1734 | if (result) | |
1735 | acpi_device_unregister(acpi_root, ACPI_BUS_REMOVAL_NORMAL); | |
a2100801 | 1736 | else |
3a37898d | 1737 | acpi_update_all_gpes(); |
1da177e4 | 1738 | |
d550d98d | 1739 | return result; |
1da177e4 | 1740 | } |