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Commit | Line | Data |
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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 | |
91e56878 MW |
32 | /* |
33 | * The following ACPI IDs are known to be suitable for representing as | |
34 | * platform devices. | |
35 | */ | |
36 | static const struct acpi_device_id acpi_platform_device_ids[] = { | |
37 | ||
142b007b AH |
38 | { "PNP0D40" }, |
39 | ||
5e7779f0 MW |
40 | /* Haswell LPSS devices */ |
41 | { "INT33C0", 0 }, | |
42 | { "INT33C1", 0 }, | |
43 | { "INT33C2", 0 }, | |
44 | { "INT33C3", 0 }, | |
45 | { "INT33C4", 0 }, | |
46 | { "INT33C5", 0 }, | |
47 | { "INT33C6", 0 }, | |
48 | { "INT33C7", 0 }, | |
49 | ||
91e56878 MW |
50 | { } |
51 | }; | |
52 | ||
1da177e4 | 53 | static LIST_HEAD(acpi_device_list); |
e49bd2dd | 54 | static LIST_HEAD(acpi_bus_id_list); |
9090589d | 55 | DEFINE_MUTEX(acpi_device_lock); |
1da177e4 LT |
56 | LIST_HEAD(acpi_wakeup_device_list); |
57 | ||
e49bd2dd | 58 | struct acpi_device_bus_id{ |
bb095854 | 59 | char bus_id[15]; |
e49bd2dd ZR |
60 | unsigned int instance_no; |
61 | struct list_head node; | |
1da177e4 | 62 | }; |
29b71a1c TR |
63 | |
64 | /* | |
65 | * Creates hid/cid(s) string needed for modalias and uevent | |
66 | * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: | |
67 | * char *modalias: "acpi:IBM0001:ACPI0001" | |
68 | */ | |
b3e572d2 AB |
69 | static int create_modalias(struct acpi_device *acpi_dev, char *modalias, |
70 | int size) | |
71 | { | |
29b71a1c | 72 | int len; |
5c9fcb5d | 73 | int count; |
7f47fa6c | 74 | struct acpi_hardware_id *id; |
29b71a1c | 75 | |
2b2ae7c7 TR |
76 | if (list_empty(&acpi_dev->pnp.ids)) |
77 | return 0; | |
78 | ||
5c9fcb5d | 79 | len = snprintf(modalias, size, "acpi:"); |
29b71a1c TR |
80 | size -= len; |
81 | ||
7f47fa6c BH |
82 | list_for_each_entry(id, &acpi_dev->pnp.ids, list) { |
83 | count = snprintf(&modalias[len], size, "%s:", id->id); | |
5c9fcb5d ZR |
84 | if (count < 0 || count >= size) |
85 | return -EINVAL; | |
86 | len += count; | |
87 | size -= count; | |
88 | } | |
89 | ||
29b71a1c TR |
90 | modalias[len] = '\0'; |
91 | return len; | |
92 | } | |
93 | ||
94 | static ssize_t | |
95 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
96 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
97 | int len; | |
98 | ||
99 | /* Device has no HID and no CID or string is >1024 */ | |
100 | len = create_modalias(acpi_dev, buf, 1024); | |
101 | if (len <= 0) | |
102 | return 0; | |
103 | buf[len++] = '\n'; | |
104 | return len; | |
105 | } | |
106 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); | |
107 | ||
c4753e57 TK |
108 | /** |
109 | * acpi_bus_hot_remove_device: hot-remove a device and its children | |
110 | * @context: struct acpi_eject_event pointer (freed in this func) | |
111 | * | |
112 | * Hot-remove a device and its children. This function frees up the | |
113 | * memory space passed by arg context, so that the caller may call | |
114 | * this function asynchronously through acpi_os_hotplug_execute(). | |
115 | */ | |
116 | void acpi_bus_hot_remove_device(void *context) | |
1da177e4 | 117 | { |
c4753e57 | 118 | struct acpi_eject_event *ej_event = (struct acpi_eject_event *) context; |
5993c467 YL |
119 | struct acpi_device *device = ej_event->device; |
120 | acpi_handle handle = device->handle; | |
b3c450c3 | 121 | acpi_handle temp; |
1da177e4 LT |
122 | struct acpi_object_list arg_list; |
123 | union acpi_object arg; | |
124 | acpi_status status = AE_OK; | |
c4753e57 | 125 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; /* default */ |
1da177e4 | 126 | |
26d46867 | 127 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
0794469d | 128 | "Hot-removing device %s...\n", dev_name(&device->dev))); |
26d46867 | 129 | |
ae281795 | 130 | if (acpi_bus_trim(device)) { |
55ac9a01 LM |
131 | printk(KERN_ERR PREFIX |
132 | "Removing device failed\n"); | |
c4753e57 | 133 | goto err_out; |
26d46867 | 134 | } |
1da177e4 | 135 | |
b3c450c3 TK |
136 | /* device has been freed */ |
137 | device = NULL; | |
138 | ||
26d46867 ZR |
139 | /* power off device */ |
140 | status = acpi_evaluate_object(handle, "_PS3", NULL, NULL); | |
141 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) | |
55ac9a01 LM |
142 | printk(KERN_WARNING PREFIX |
143 | "Power-off device failed\n"); | |
26d46867 | 144 | |
b3c450c3 | 145 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_LCK", &temp))) { |
1da177e4 LT |
146 | arg_list.count = 1; |
147 | arg_list.pointer = &arg; | |
148 | arg.type = ACPI_TYPE_INTEGER; | |
149 | arg.integer.value = 0; | |
150 | acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); | |
151 | } | |
1da177e4 | 152 | |
1da177e4 LT |
153 | arg_list.count = 1; |
154 | arg_list.pointer = &arg; | |
155 | arg.type = ACPI_TYPE_INTEGER; | |
156 | arg.integer.value = 1; | |
1da177e4 | 157 | |
1da177e4 LT |
158 | /* |
159 | * TBD: _EJD support. | |
160 | */ | |
1da177e4 | 161 | status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); |
c4753e57 TK |
162 | if (ACPI_FAILURE(status)) { |
163 | if (status != AE_NOT_FOUND) | |
164 | printk(KERN_WARNING PREFIX | |
165 | "Eject device failed\n"); | |
166 | goto err_out; | |
167 | } | |
1da177e4 | 168 | |
c4753e57 TK |
169 | kfree(context); |
170 | return; | |
1da177e4 | 171 | |
c4753e57 TK |
172 | err_out: |
173 | /* Inform firmware the hot-remove operation has completed w/ error */ | |
174 | (void) acpi_evaluate_hotplug_ost(handle, | |
175 | ej_event->event, ost_code, NULL); | |
176 | kfree(context); | |
c8d72a5e | 177 | return; |
1da177e4 | 178 | } |
61622acc | 179 | EXPORT_SYMBOL(acpi_bus_hot_remove_device); |
1da177e4 | 180 | |
836aedb1 RW |
181 | static ssize_t real_power_state_show(struct device *dev, |
182 | struct device_attribute *attr, char *buf) | |
183 | { | |
184 | struct acpi_device *adev = to_acpi_device(dev); | |
185 | int state; | |
186 | int ret; | |
187 | ||
188 | ret = acpi_device_get_power(adev, &state); | |
189 | if (ret) | |
190 | return ret; | |
191 | ||
192 | return sprintf(buf, "%s\n", acpi_power_state_string(state)); | |
193 | } | |
194 | ||
195 | static DEVICE_ATTR(real_power_state, 0444, real_power_state_show, NULL); | |
196 | ||
197 | static ssize_t power_state_show(struct device *dev, | |
198 | struct device_attribute *attr, char *buf) | |
199 | { | |
200 | struct acpi_device *adev = to_acpi_device(dev); | |
201 | ||
202 | return sprintf(buf, "%s\n", acpi_power_state_string(adev->power.state)); | |
203 | } | |
204 | ||
205 | static DEVICE_ATTR(power_state, 0444, power_state_show, NULL); | |
206 | ||
1da177e4 | 207 | static ssize_t |
f883d9db PM |
208 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
209 | const char *buf, size_t count) | |
1da177e4 | 210 | { |
4be44fcd | 211 | int ret = count; |
4be44fcd | 212 | acpi_status status; |
4be44fcd | 213 | acpi_object_type type = 0; |
f883d9db | 214 | struct acpi_device *acpi_device = to_acpi_device(d); |
c4753e57 | 215 | struct acpi_eject_event *ej_event; |
1da177e4 | 216 | |
1da177e4 LT |
217 | if ((!count) || (buf[0] != '1')) { |
218 | return -EINVAL; | |
219 | } | |
1da177e4 | 220 | #ifndef FORCE_EJECT |
f883d9db | 221 | if (acpi_device->driver == NULL) { |
1da177e4 LT |
222 | ret = -ENODEV; |
223 | goto err; | |
224 | } | |
225 | #endif | |
f883d9db PM |
226 | status = acpi_get_type(acpi_device->handle, &type); |
227 | if (ACPI_FAILURE(status) || (!acpi_device->flags.ejectable)) { | |
1da177e4 LT |
228 | ret = -ENODEV; |
229 | goto err; | |
230 | } | |
1da177e4 | 231 | |
c4753e57 TK |
232 | ej_event = kmalloc(sizeof(*ej_event), GFP_KERNEL); |
233 | if (!ej_event) { | |
234 | ret = -ENOMEM; | |
235 | goto err; | |
236 | } | |
237 | ||
5993c467 | 238 | ej_event->device = acpi_device; |
c4753e57 TK |
239 | if (acpi_device->flags.eject_pending) { |
240 | /* event originated from ACPI eject notification */ | |
241 | ej_event->event = ACPI_NOTIFY_EJECT_REQUEST; | |
242 | acpi_device->flags.eject_pending = 0; | |
243 | } else { | |
244 | /* event originated from user */ | |
245 | ej_event->event = ACPI_OST_EC_OSPM_EJECT; | |
5993c467 | 246 | (void) acpi_evaluate_hotplug_ost(acpi_device->handle, |
c4753e57 TK |
247 | ej_event->event, ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); |
248 | } | |
249 | ||
250 | acpi_os_hotplug_execute(acpi_bus_hot_remove_device, (void *)ej_event); | |
74523c90 | 251 | err: |
1da177e4 | 252 | return ret; |
1da177e4 LT |
253 | } |
254 | ||
f883d9db | 255 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
1da177e4 | 256 | |
e49bd2dd ZR |
257 | static ssize_t |
258 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
259 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1da177e4 | 260 | |
ea8d82fd | 261 | return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev)); |
1da177e4 | 262 | } |
e49bd2dd | 263 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
1da177e4 | 264 | |
923d4a45 LZ |
265 | static ssize_t acpi_device_uid_show(struct device *dev, |
266 | struct device_attribute *attr, char *buf) | |
267 | { | |
268 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
269 | ||
270 | return sprintf(buf, "%s\n", acpi_dev->pnp.unique_id); | |
271 | } | |
272 | static DEVICE_ATTR(uid, 0444, acpi_device_uid_show, NULL); | |
273 | ||
274 | static ssize_t acpi_device_adr_show(struct device *dev, | |
275 | struct device_attribute *attr, char *buf) | |
276 | { | |
277 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
278 | ||
279 | return sprintf(buf, "0x%08x\n", | |
280 | (unsigned int)(acpi_dev->pnp.bus_address)); | |
281 | } | |
282 | static DEVICE_ATTR(adr, 0444, acpi_device_adr_show, NULL); | |
283 | ||
e49bd2dd ZR |
284 | static ssize_t |
285 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
286 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
287 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
288 | int result; | |
1da177e4 | 289 | |
e49bd2dd | 290 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
0c526d96 | 291 | if (result) |
e49bd2dd | 292 | goto end; |
1da177e4 | 293 | |
e49bd2dd ZR |
294 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
295 | kfree(path.pointer); | |
0c526d96 | 296 | end: |
e49bd2dd | 297 | return result; |
1da177e4 | 298 | } |
e49bd2dd | 299 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
1da177e4 | 300 | |
d1efe3c3 LO |
301 | /* sysfs file that shows description text from the ACPI _STR method */ |
302 | static ssize_t description_show(struct device *dev, | |
303 | struct device_attribute *attr, | |
304 | char *buf) { | |
305 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
306 | int result; | |
307 | ||
308 | if (acpi_dev->pnp.str_obj == NULL) | |
309 | return 0; | |
310 | ||
311 | /* | |
312 | * The _STR object contains a Unicode identifier for a device. | |
313 | * We need to convert to utf-8 so it can be displayed. | |
314 | */ | |
315 | result = utf16s_to_utf8s( | |
316 | (wchar_t *)acpi_dev->pnp.str_obj->buffer.pointer, | |
317 | acpi_dev->pnp.str_obj->buffer.length, | |
318 | UTF16_LITTLE_ENDIAN, buf, | |
319 | PAGE_SIZE); | |
320 | ||
321 | buf[result++] = '\n'; | |
322 | ||
323 | return result; | |
324 | } | |
325 | static DEVICE_ATTR(description, 0444, description_show, NULL); | |
326 | ||
bb74ac23 YI |
327 | static ssize_t |
328 | acpi_device_sun_show(struct device *dev, struct device_attribute *attr, | |
329 | char *buf) { | |
330 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
331 | ||
332 | return sprintf(buf, "%lu\n", acpi_dev->pnp.sun); | |
333 | } | |
334 | static DEVICE_ATTR(sun, 0444, acpi_device_sun_show, NULL); | |
335 | ||
e49bd2dd | 336 | static int acpi_device_setup_files(struct acpi_device *dev) |
1da177e4 | 337 | { |
d1efe3c3 | 338 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
f883d9db PM |
339 | acpi_status status; |
340 | acpi_handle temp; | |
bb74ac23 | 341 | unsigned long long sun; |
e49bd2dd | 342 | int result = 0; |
1da177e4 LT |
343 | |
344 | /* | |
e49bd2dd | 345 | * Devices gotten from FADT don't have a "path" attribute |
1da177e4 | 346 | */ |
0c526d96 | 347 | if (dev->handle) { |
e49bd2dd | 348 | result = device_create_file(&dev->dev, &dev_attr_path); |
0c526d96 | 349 | if (result) |
e49bd2dd | 350 | goto end; |
1da177e4 LT |
351 | } |
352 | ||
2b2ae7c7 TR |
353 | if (!list_empty(&dev->pnp.ids)) { |
354 | result = device_create_file(&dev->dev, &dev_attr_hid); | |
355 | if (result) | |
356 | goto end; | |
1da177e4 | 357 | |
2b2ae7c7 TR |
358 | result = device_create_file(&dev->dev, &dev_attr_modalias); |
359 | if (result) | |
360 | goto end; | |
361 | } | |
29b71a1c | 362 | |
d1efe3c3 LO |
363 | /* |
364 | * If device has _STR, 'description' file is created | |
365 | */ | |
366 | status = acpi_get_handle(dev->handle, "_STR", &temp); | |
367 | if (ACPI_SUCCESS(status)) { | |
368 | status = acpi_evaluate_object(dev->handle, "_STR", | |
369 | NULL, &buffer); | |
370 | if (ACPI_FAILURE(status)) | |
371 | buffer.pointer = NULL; | |
372 | dev->pnp.str_obj = buffer.pointer; | |
373 | result = device_create_file(&dev->dev, &dev_attr_description); | |
374 | if (result) | |
375 | goto end; | |
376 | } | |
377 | ||
923d4a45 LZ |
378 | if (dev->flags.bus_address) |
379 | result = device_create_file(&dev->dev, &dev_attr_adr); | |
380 | if (dev->pnp.unique_id) | |
381 | result = device_create_file(&dev->dev, &dev_attr_uid); | |
382 | ||
bb74ac23 YI |
383 | status = acpi_evaluate_integer(dev->handle, "_SUN", NULL, &sun); |
384 | if (ACPI_SUCCESS(status)) { | |
385 | dev->pnp.sun = (unsigned long)sun; | |
386 | result = device_create_file(&dev->dev, &dev_attr_sun); | |
387 | if (result) | |
388 | goto end; | |
389 | } else { | |
390 | dev->pnp.sun = (unsigned long)-1; | |
391 | } | |
392 | ||
e49bd2dd ZR |
393 | /* |
394 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
395 | * hot-removal function from userland. | |
396 | */ | |
f883d9db | 397 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); |
836aedb1 | 398 | if (ACPI_SUCCESS(status)) { |
e49bd2dd | 399 | result = device_create_file(&dev->dev, &dev_attr_eject); |
836aedb1 RW |
400 | if (result) |
401 | return result; | |
402 | } | |
403 | ||
404 | if (dev->flags.power_manageable) { | |
405 | result = device_create_file(&dev->dev, &dev_attr_power_state); | |
406 | if (result) | |
407 | return result; | |
408 | ||
409 | if (dev->power.flags.power_resources) | |
410 | result = device_create_file(&dev->dev, | |
411 | &dev_attr_real_power_state); | |
412 | } | |
413 | ||
0c526d96 | 414 | end: |
e49bd2dd | 415 | return result; |
1da177e4 LT |
416 | } |
417 | ||
f883d9db | 418 | static void acpi_device_remove_files(struct acpi_device *dev) |
1da177e4 | 419 | { |
f883d9db PM |
420 | acpi_status status; |
421 | acpi_handle temp; | |
1da177e4 | 422 | |
836aedb1 RW |
423 | if (dev->flags.power_manageable) { |
424 | device_remove_file(&dev->dev, &dev_attr_power_state); | |
425 | if (dev->power.flags.power_resources) | |
426 | device_remove_file(&dev->dev, | |
427 | &dev_attr_real_power_state); | |
428 | } | |
429 | ||
f883d9db | 430 | /* |
d1efe3c3 LO |
431 | * If device has _STR, remove 'description' file |
432 | */ | |
433 | status = acpi_get_handle(dev->handle, "_STR", &temp); | |
434 | if (ACPI_SUCCESS(status)) { | |
435 | kfree(dev->pnp.str_obj); | |
436 | device_remove_file(&dev->dev, &dev_attr_description); | |
437 | } | |
438 | /* | |
439 | * If device has _EJ0, remove 'eject' file. | |
f883d9db PM |
440 | */ |
441 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); | |
442 | if (ACPI_SUCCESS(status)) | |
443 | device_remove_file(&dev->dev, &dev_attr_eject); | |
1da177e4 | 444 | |
bb74ac23 YI |
445 | status = acpi_get_handle(dev->handle, "_SUN", &temp); |
446 | if (ACPI_SUCCESS(status)) | |
447 | device_remove_file(&dev->dev, &dev_attr_sun); | |
448 | ||
923d4a45 LZ |
449 | if (dev->pnp.unique_id) |
450 | device_remove_file(&dev->dev, &dev_attr_uid); | |
451 | if (dev->flags.bus_address) | |
452 | device_remove_file(&dev->dev, &dev_attr_adr); | |
1131b938 BH |
453 | device_remove_file(&dev->dev, &dev_attr_modalias); |
454 | device_remove_file(&dev->dev, &dev_attr_hid); | |
0c526d96 | 455 | if (dev->handle) |
e49bd2dd | 456 | device_remove_file(&dev->dev, &dev_attr_path); |
1da177e4 | 457 | } |
1da177e4 | 458 | /* -------------------------------------------------------------------------- |
9e89dde2 | 459 | ACPI Bus operations |
1da177e4 | 460 | -------------------------------------------------------------------------- */ |
29b71a1c | 461 | |
cf761af9 MW |
462 | static const struct acpi_device_id *__acpi_match_device( |
463 | struct acpi_device *device, const struct acpi_device_id *ids) | |
29b71a1c TR |
464 | { |
465 | const struct acpi_device_id *id; | |
7f47fa6c | 466 | struct acpi_hardware_id *hwid; |
29b71a1c | 467 | |
39a0ad87 ZY |
468 | /* |
469 | * If the device is not present, it is unnecessary to load device | |
470 | * driver for it. | |
471 | */ | |
472 | if (!device->status.present) | |
cf761af9 | 473 | return NULL; |
39a0ad87 | 474 | |
7f47fa6c BH |
475 | for (id = ids; id->id[0]; id++) |
476 | list_for_each_entry(hwid, &device->pnp.ids, list) | |
477 | if (!strcmp((char *) id->id, hwid->id)) | |
cf761af9 MW |
478 | return id; |
479 | ||
480 | return NULL; | |
481 | } | |
482 | ||
483 | /** | |
484 | * acpi_match_device - Match a struct device against a given list of ACPI IDs | |
485 | * @ids: Array of struct acpi_device_id object to match against. | |
486 | * @dev: The device structure to match. | |
487 | * | |
488 | * Check if @dev has a valid ACPI handle and if there is a struct acpi_device | |
489 | * object for that handle and use that object to match against a given list of | |
490 | * device IDs. | |
491 | * | |
492 | * Return a pointer to the first matching ID on success or %NULL on failure. | |
493 | */ | |
494 | const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids, | |
495 | const struct device *dev) | |
496 | { | |
497 | struct acpi_device *adev; | |
498 | ||
95f8a082 RW |
499 | if (!ids || !ACPI_HANDLE(dev) |
500 | || ACPI_FAILURE(acpi_bus_get_device(ACPI_HANDLE(dev), &adev))) | |
cf761af9 MW |
501 | return NULL; |
502 | ||
503 | return __acpi_match_device(adev, ids); | |
504 | } | |
505 | EXPORT_SYMBOL_GPL(acpi_match_device); | |
29b71a1c | 506 | |
cf761af9 MW |
507 | int acpi_match_device_ids(struct acpi_device *device, |
508 | const struct acpi_device_id *ids) | |
509 | { | |
510 | return __acpi_match_device(device, ids) ? 0 : -ENOENT; | |
29b71a1c TR |
511 | } |
512 | EXPORT_SYMBOL(acpi_match_device_ids); | |
513 | ||
82c7d5ef | 514 | void acpi_free_ids(struct acpi_device *device) |
7f47fa6c BH |
515 | { |
516 | struct acpi_hardware_id *id, *tmp; | |
517 | ||
518 | list_for_each_entry_safe(id, tmp, &device->pnp.ids, list) { | |
519 | kfree(id->id); | |
520 | kfree(id); | |
521 | } | |
d43e167d | 522 | kfree(device->pnp.unique_id); |
7f47fa6c BH |
523 | } |
524 | ||
0b224527 RW |
525 | static void acpi_free_power_resources_lists(struct acpi_device *device) |
526 | { | |
527 | int i; | |
528 | ||
993cbe59 RW |
529 | if (device->wakeup.flags.valid) |
530 | acpi_power_resources_list_free(&device->wakeup.resources); | |
531 | ||
0b224527 RW |
532 | if (!device->flags.power_manageable) |
533 | return; | |
534 | ||
535 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) { | |
536 | struct acpi_device_power_state *ps = &device->power.states[i]; | |
537 | acpi_power_resources_list_free(&ps->resources); | |
538 | } | |
7f47fa6c BH |
539 | } |
540 | ||
1890a97a | 541 | static void acpi_device_release(struct device *dev) |
1da177e4 | 542 | { |
1890a97a | 543 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 544 | |
7f47fa6c | 545 | acpi_free_ids(acpi_dev); |
0b224527 | 546 | acpi_free_power_resources_lists(acpi_dev); |
1890a97a | 547 | kfree(acpi_dev); |
1da177e4 LT |
548 | } |
549 | ||
5d9464a4 | 550 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 551 | { |
5d9464a4 PM |
552 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
553 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
1da177e4 | 554 | |
209d3b17 | 555 | return acpi_dev->flags.match_driver |
805d410f | 556 | && !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
5d9464a4 | 557 | } |
1da177e4 | 558 | |
7eff2e7a | 559 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 | 560 | { |
5d9464a4 | 561 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
7eff2e7a | 562 | int len; |
5d9464a4 | 563 | |
2b2ae7c7 TR |
564 | if (list_empty(&acpi_dev->pnp.ids)) |
565 | return 0; | |
566 | ||
7eff2e7a KS |
567 | if (add_uevent_var(env, "MODALIAS=")) |
568 | return -ENOMEM; | |
569 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], | |
570 | sizeof(env->buf) - env->buflen); | |
571 | if (len >= (sizeof(env->buf) - env->buflen)) | |
572 | return -ENOMEM; | |
573 | env->buflen += len; | |
9e89dde2 | 574 | return 0; |
1da177e4 LT |
575 | } |
576 | ||
46ec8598 BH |
577 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
578 | { | |
579 | struct acpi_device *device = data; | |
580 | ||
581 | device->driver->ops.notify(device, event); | |
582 | } | |
583 | ||
584 | static acpi_status acpi_device_notify_fixed(void *data) | |
585 | { | |
586 | struct acpi_device *device = data; | |
587 | ||
53de5356 BH |
588 | /* Fixed hardware devices have no handles */ |
589 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); | |
46ec8598 BH |
590 | return AE_OK; |
591 | } | |
592 | ||
593 | static int acpi_device_install_notify_handler(struct acpi_device *device) | |
594 | { | |
595 | acpi_status status; | |
46ec8598 | 596 | |
ccba2a36 | 597 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
598 | status = |
599 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
600 | acpi_device_notify_fixed, | |
601 | device); | |
ccba2a36 | 602 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
603 | status = |
604 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
605 | acpi_device_notify_fixed, | |
606 | device); | |
607 | else | |
608 | status = acpi_install_notify_handler(device->handle, | |
609 | ACPI_DEVICE_NOTIFY, | |
610 | acpi_device_notify, | |
611 | device); | |
612 | ||
613 | if (ACPI_FAILURE(status)) | |
614 | return -EINVAL; | |
615 | return 0; | |
616 | } | |
617 | ||
618 | static void acpi_device_remove_notify_handler(struct acpi_device *device) | |
619 | { | |
ccba2a36 | 620 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
621 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, |
622 | acpi_device_notify_fixed); | |
ccba2a36 | 623 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
624 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, |
625 | acpi_device_notify_fixed); | |
626 | else | |
627 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, | |
628 | acpi_device_notify); | |
629 | } | |
630 | ||
5d9464a4 | 631 | static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *); |
5d9464a4 | 632 | static int acpi_device_probe(struct device * dev) |
1da177e4 | 633 | { |
5d9464a4 PM |
634 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
635 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
636 | int ret; | |
637 | ||
638 | ret = acpi_bus_driver_init(acpi_dev, acpi_drv); | |
639 | if (!ret) { | |
46ec8598 BH |
640 | if (acpi_drv->ops.notify) { |
641 | ret = acpi_device_install_notify_handler(acpi_dev); | |
642 | if (ret) { | |
46ec8598 | 643 | if (acpi_drv->ops.remove) |
51fac838 | 644 | acpi_drv->ops.remove(acpi_dev); |
46ec8598 BH |
645 | return ret; |
646 | } | |
647 | } | |
648 | ||
5d9464a4 PM |
649 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
650 | "Found driver [%s] for device [%s]\n", | |
651 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
652 | get_device(dev); | |
653 | } | |
654 | return ret; | |
655 | } | |
1da177e4 | 656 | |
5d9464a4 PM |
657 | static int acpi_device_remove(struct device * dev) |
658 | { | |
659 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
660 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
661 | ||
662 | if (acpi_drv) { | |
46ec8598 BH |
663 | if (acpi_drv->ops.notify) |
664 | acpi_device_remove_notify_handler(acpi_dev); | |
5d9464a4 | 665 | if (acpi_drv->ops.remove) |
51fac838 | 666 | acpi_drv->ops.remove(acpi_dev); |
1da177e4 | 667 | } |
5d9464a4 | 668 | acpi_dev->driver = NULL; |
db89b4f0 | 669 | acpi_dev->driver_data = NULL; |
1da177e4 | 670 | |
5d9464a4 | 671 | put_device(dev); |
9e89dde2 ZR |
672 | return 0; |
673 | } | |
1da177e4 | 674 | |
55955aad | 675 | struct bus_type acpi_bus_type = { |
9e89dde2 | 676 | .name = "acpi", |
5d9464a4 PM |
677 | .match = acpi_bus_match, |
678 | .probe = acpi_device_probe, | |
679 | .remove = acpi_device_remove, | |
680 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
681 | }; |
682 | ||
cf860be6 RW |
683 | int acpi_device_add(struct acpi_device *device, |
684 | void (*release)(struct device *)) | |
1da177e4 | 685 | { |
4be44fcd | 686 | int result; |
e49bd2dd ZR |
687 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
688 | int found = 0; | |
66b7ed40 | 689 | |
d43e167d RW |
690 | if (device->handle) { |
691 | acpi_status status; | |
692 | ||
693 | status = acpi_attach_data(device->handle, acpi_bus_data_handler, | |
694 | device); | |
695 | if (ACPI_FAILURE(status)) { | |
696 | acpi_handle_err(device->handle, | |
697 | "Unable to attach device data\n"); | |
698 | return -ENODEV; | |
699 | } | |
700 | } | |
701 | ||
9e89dde2 ZR |
702 | /* |
703 | * Linkage | |
704 | * ------- | |
705 | * Link this device to its parent and siblings. | |
706 | */ | |
707 | INIT_LIST_HEAD(&device->children); | |
708 | INIT_LIST_HEAD(&device->node); | |
9e89dde2 | 709 | INIT_LIST_HEAD(&device->wakeup_list); |
1033f904 LT |
710 | INIT_LIST_HEAD(&device->physical_node_list); |
711 | mutex_init(&device->physical_node_lock); | |
bc9b6407 | 712 | INIT_LIST_HEAD(&device->power_dependent); |
1da177e4 | 713 | |
e49bd2dd ZR |
714 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
715 | if (!new_bus_id) { | |
d43e167d RW |
716 | pr_err(PREFIX "Memory allocation error\n"); |
717 | result = -ENOMEM; | |
718 | goto err_detach; | |
1da177e4 | 719 | } |
e49bd2dd | 720 | |
9090589d | 721 | mutex_lock(&acpi_device_lock); |
e49bd2dd ZR |
722 | /* |
723 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
724 | * If failed, create one and link it into acpi_bus_id_list | |
725 | */ | |
726 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
1131b938 BH |
727 | if (!strcmp(acpi_device_bus_id->bus_id, |
728 | acpi_device_hid(device))) { | |
729 | acpi_device_bus_id->instance_no++; | |
e49bd2dd ZR |
730 | found = 1; |
731 | kfree(new_bus_id); | |
732 | break; | |
733 | } | |
1da177e4 | 734 | } |
0c526d96 | 735 | if (!found) { |
e49bd2dd | 736 | acpi_device_bus_id = new_bus_id; |
1131b938 | 737 | strcpy(acpi_device_bus_id->bus_id, acpi_device_hid(device)); |
e49bd2dd ZR |
738 | acpi_device_bus_id->instance_no = 0; |
739 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 740 | } |
0794469d | 741 | dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 742 | |
33b57150 | 743 | if (device->parent) |
9e89dde2 | 744 | list_add_tail(&device->node, &device->parent->children); |
33b57150 | 745 | |
9e89dde2 ZR |
746 | if (device->wakeup.flags.valid) |
747 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
9090589d | 748 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 749 | |
1890a97a | 750 | if (device->parent) |
66b7ed40 | 751 | device->dev.parent = &device->parent->dev; |
1890a97a | 752 | device->dev.bus = &acpi_bus_type; |
82c7d5ef | 753 | device->dev.release = release; |
cf860be6 | 754 | result = device_add(&device->dev); |
0c526d96 | 755 | if (result) { |
8b12b922 | 756 | dev_err(&device->dev, "Error registering device\n"); |
d43e167d | 757 | goto err; |
1da177e4 | 758 | } |
1da177e4 | 759 | |
e49bd2dd | 760 | result = acpi_device_setup_files(device); |
0c526d96 | 761 | if (result) |
0794469d KS |
762 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
763 | dev_name(&device->dev)); | |
1da177e4 | 764 | |
96333578 | 765 | device->removal_type = ACPI_BUS_REMOVAL_NORMAL; |
1da177e4 | 766 | return 0; |
d43e167d RW |
767 | |
768 | err: | |
9090589d | 769 | mutex_lock(&acpi_device_lock); |
33b57150 | 770 | if (device->parent) |
e49bd2dd | 771 | list_del(&device->node); |
e49bd2dd | 772 | list_del(&device->wakeup_list); |
9090589d | 773 | mutex_unlock(&acpi_device_lock); |
d43e167d RW |
774 | |
775 | err_detach: | |
776 | acpi_detach_data(device->handle, acpi_bus_data_handler); | |
e49bd2dd | 777 | return result; |
1da177e4 LT |
778 | } |
779 | ||
b17b537a | 780 | static void acpi_device_unregister(struct acpi_device *device) |
9e89dde2 | 781 | { |
9090589d | 782 | mutex_lock(&acpi_device_lock); |
33b57150 | 783 | if (device->parent) |
9e89dde2 | 784 | list_del(&device->node); |
1da177e4 | 785 | |
9e89dde2 | 786 | list_del(&device->wakeup_list); |
9090589d | 787 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 788 | |
9e89dde2 | 789 | acpi_detach_data(device->handle, acpi_bus_data_handler); |
1890a97a | 790 | |
bc9b6407 | 791 | acpi_power_add_remove_device(device, false); |
f883d9db | 792 | acpi_device_remove_files(device); |
b1c0f99b RW |
793 | if (device->remove) |
794 | device->remove(device); | |
795 | ||
cf860be6 | 796 | device_del(&device->dev); |
bc9b6407 RW |
797 | /* |
798 | * Drop the reference counts of all power resources the device depends | |
799 | * on and turn off the ones that have no more references. | |
800 | */ | |
801 | acpi_power_transition(device, ACPI_STATE_D3_COLD); | |
cf860be6 | 802 | put_device(&device->dev); |
1da177e4 LT |
803 | } |
804 | ||
9e89dde2 ZR |
805 | /* -------------------------------------------------------------------------- |
806 | Driver Management | |
807 | -------------------------------------------------------------------------- */ | |
1da177e4 | 808 | /** |
d758a8fa RD |
809 | * acpi_bus_driver_init - add a device to a driver |
810 | * @device: the device to add and initialize | |
811 | * @driver: driver for the device | |
812 | * | |
0c526d96 | 813 | * Used to initialize a device via its device driver. Called whenever a |
1890a97a | 814 | * driver is bound to a device. Invokes the driver's add() ops. |
1da177e4 LT |
815 | */ |
816 | static int | |
4be44fcd | 817 | acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) |
1da177e4 | 818 | { |
4be44fcd | 819 | int result = 0; |
1da177e4 | 820 | |
1da177e4 | 821 | if (!device || !driver) |
d550d98d | 822 | return -EINVAL; |
1da177e4 LT |
823 | |
824 | if (!driver->ops.add) | |
d550d98d | 825 | return -ENOSYS; |
1da177e4 LT |
826 | |
827 | result = driver->ops.add(device); | |
828 | if (result) { | |
829 | device->driver = NULL; | |
db89b4f0 | 830 | device->driver_data = NULL; |
d550d98d | 831 | return result; |
1da177e4 LT |
832 | } |
833 | ||
834 | device->driver = driver; | |
835 | ||
836 | /* | |
837 | * TBD - Configuration Management: Assign resources to device based | |
838 | * upon possible configuration and currently allocated resources. | |
839 | */ | |
840 | ||
4be44fcd LB |
841 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
842 | "Driver successfully bound to device\n")); | |
d550d98d | 843 | return 0; |
3fb02738 RS |
844 | } |
845 | ||
9e89dde2 ZR |
846 | /** |
847 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
848 | * @driver: driver being registered | |
849 | * | |
850 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
851 | * devices that match the driver's criteria and binds. Returns zero for | |
852 | * success or a negative error status for failure. | |
853 | */ | |
854 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
1da177e4 | 855 | { |
1890a97a | 856 | int ret; |
1da177e4 | 857 | |
9e89dde2 ZR |
858 | if (acpi_disabled) |
859 | return -ENODEV; | |
1890a97a PM |
860 | driver->drv.name = driver->name; |
861 | driver->drv.bus = &acpi_bus_type; | |
862 | driver->drv.owner = driver->owner; | |
1da177e4 | 863 | |
1890a97a PM |
864 | ret = driver_register(&driver->drv); |
865 | return ret; | |
9e89dde2 | 866 | } |
1da177e4 | 867 | |
9e89dde2 ZR |
868 | EXPORT_SYMBOL(acpi_bus_register_driver); |
869 | ||
870 | /** | |
871 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus | |
872 | * @driver: driver to unregister | |
873 | * | |
874 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
875 | * devices that match the driver's criteria and unbinds. | |
876 | */ | |
877 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
878 | { | |
1890a97a | 879 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
880 | } |
881 | ||
882 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
883 | ||
9e89dde2 ZR |
884 | /* -------------------------------------------------------------------------- |
885 | Device Enumeration | |
886 | -------------------------------------------------------------------------- */ | |
5c478f49 BH |
887 | static struct acpi_device *acpi_bus_get_parent(acpi_handle handle) |
888 | { | |
889 | acpi_status status; | |
890 | int ret; | |
891 | struct acpi_device *device; | |
892 | ||
893 | /* | |
894 | * Fixed hardware devices do not appear in the namespace and do not | |
895 | * have handles, but we fabricate acpi_devices for them, so we have | |
896 | * to deal with them specially. | |
897 | */ | |
898 | if (handle == NULL) | |
899 | return acpi_root; | |
900 | ||
901 | do { | |
902 | status = acpi_get_parent(handle, &handle); | |
903 | if (status == AE_NULL_ENTRY) | |
904 | return NULL; | |
905 | if (ACPI_FAILURE(status)) | |
906 | return acpi_root; | |
907 | ||
908 | ret = acpi_bus_get_device(handle, &device); | |
909 | if (ret == 0) | |
910 | return device; | |
911 | } while (1); | |
912 | } | |
913 | ||
9e89dde2 ZR |
914 | acpi_status |
915 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
916 | { | |
917 | acpi_status status; | |
918 | acpi_handle tmp; | |
919 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
920 | union acpi_object *obj; | |
921 | ||
922 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
923 | if (ACPI_FAILURE(status)) | |
924 | return status; | |
925 | ||
926 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
927 | if (ACPI_SUCCESS(status)) { | |
928 | obj = buffer.pointer; | |
3b5fee59 HM |
929 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
930 | ejd); | |
9e89dde2 ZR |
931 | kfree(buffer.pointer); |
932 | } | |
933 | return status; | |
934 | } | |
935 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
936 | ||
8e4319c4 | 937 | void acpi_bus_data_handler(acpi_handle handle, void *context) |
9e89dde2 ZR |
938 | { |
939 | ||
940 | /* TBD */ | |
941 | ||
942 | return; | |
943 | } | |
944 | ||
e88c9c60 RW |
945 | static int acpi_bus_extract_wakeup_device_power_package(acpi_handle handle, |
946 | struct acpi_device_wakeup *wakeup) | |
9e89dde2 | 947 | { |
b581a7f9 RW |
948 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
949 | union acpi_object *package = NULL; | |
9e89dde2 | 950 | union acpi_object *element = NULL; |
b581a7f9 | 951 | acpi_status status; |
e88c9c60 | 952 | int err = -ENODATA; |
9e89dde2 | 953 | |
b581a7f9 | 954 | if (!wakeup) |
e88c9c60 | 955 | return -EINVAL; |
9e89dde2 | 956 | |
993cbe59 | 957 | INIT_LIST_HEAD(&wakeup->resources); |
9e89dde2 | 958 | |
b581a7f9 RW |
959 | /* _PRW */ |
960 | status = acpi_evaluate_object(handle, "_PRW", NULL, &buffer); | |
961 | if (ACPI_FAILURE(status)) { | |
962 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
e88c9c60 | 963 | return err; |
b581a7f9 RW |
964 | } |
965 | ||
966 | package = (union acpi_object *)buffer.pointer; | |
967 | ||
e88c9c60 | 968 | if (!package || package->package.count < 2) |
b581a7f9 | 969 | goto out; |
b581a7f9 | 970 | |
9e89dde2 | 971 | element = &(package->package.elements[0]); |
e88c9c60 | 972 | if (!element) |
b581a7f9 | 973 | goto out; |
e88c9c60 | 974 | |
9e89dde2 ZR |
975 | if (element->type == ACPI_TYPE_PACKAGE) { |
976 | if ((element->package.count < 2) || | |
977 | (element->package.elements[0].type != | |
978 | ACPI_TYPE_LOCAL_REFERENCE) | |
e88c9c60 | 979 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) |
b581a7f9 | 980 | goto out; |
e88c9c60 | 981 | |
b581a7f9 | 982 | wakeup->gpe_device = |
9e89dde2 | 983 | element->package.elements[0].reference.handle; |
b581a7f9 | 984 | wakeup->gpe_number = |
9e89dde2 ZR |
985 | (u32) element->package.elements[1].integer.value; |
986 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
b581a7f9 RW |
987 | wakeup->gpe_device = NULL; |
988 | wakeup->gpe_number = element->integer.value; | |
989 | } else { | |
b581a7f9 RW |
990 | goto out; |
991 | } | |
9e89dde2 ZR |
992 | |
993 | element = &(package->package.elements[1]); | |
e88c9c60 | 994 | if (element->type != ACPI_TYPE_INTEGER) |
b581a7f9 | 995 | goto out; |
e88c9c60 | 996 | |
b581a7f9 | 997 | wakeup->sleep_state = element->integer.value; |
9e89dde2 | 998 | |
e88c9c60 RW |
999 | err = acpi_extract_power_resources(package, 2, &wakeup->resources); |
1000 | if (err) | |
b581a7f9 | 1001 | goto out; |
9e89dde2 | 1002 | |
0596a52b RW |
1003 | if (!list_empty(&wakeup->resources)) { |
1004 | int sleep_state; | |
9e89dde2 | 1005 | |
0596a52b RW |
1006 | sleep_state = acpi_power_min_system_level(&wakeup->resources); |
1007 | if (sleep_state < wakeup->sleep_state) { | |
1008 | acpi_handle_warn(handle, "Overriding _PRW sleep state " | |
1009 | "(S%d) by S%d from power resources\n", | |
1010 | (int)wakeup->sleep_state, sleep_state); | |
1011 | wakeup->sleep_state = sleep_state; | |
1012 | } | |
1013 | } | |
bba63a29 | 1014 | acpi_setup_gpe_for_wake(handle, wakeup->gpe_device, wakeup->gpe_number); |
9874647b | 1015 | |
b581a7f9 RW |
1016 | out: |
1017 | kfree(buffer.pointer); | |
e88c9c60 | 1018 | return err; |
1da177e4 LT |
1019 | } |
1020 | ||
f517709d | 1021 | static void acpi_bus_set_run_wake_flags(struct acpi_device *device) |
1da177e4 | 1022 | { |
29b71a1c | 1023 | struct acpi_device_id button_device_ids[] = { |
29b71a1c | 1024 | {"PNP0C0C", 0}, |
b7e38304 | 1025 | {"PNP0C0D", 0}, |
29b71a1c TR |
1026 | {"PNP0C0E", 0}, |
1027 | {"", 0}, | |
1028 | }; | |
f517709d RW |
1029 | acpi_status status; |
1030 | acpi_event_status event_status; | |
1031 | ||
b67ea761 | 1032 | device->wakeup.flags.notifier_present = 0; |
f517709d RW |
1033 | |
1034 | /* Power button, Lid switch always enable wakeup */ | |
1035 | if (!acpi_match_device_ids(device, button_device_ids)) { | |
1036 | device->wakeup.flags.run_wake = 1; | |
b7e38304 ZR |
1037 | if (!acpi_match_device_ids(device, &button_device_ids[1])) { |
1038 | /* Do not use Lid/sleep button for S5 wakeup */ | |
1039 | if (device->wakeup.sleep_state == ACPI_STATE_S5) | |
1040 | device->wakeup.sleep_state = ACPI_STATE_S4; | |
1041 | } | |
f2b56bc8 | 1042 | device_set_wakeup_capable(&device->dev, true); |
f517709d RW |
1043 | return; |
1044 | } | |
1045 | ||
e8e18c95 RW |
1046 | status = acpi_get_gpe_status(device->wakeup.gpe_device, |
1047 | device->wakeup.gpe_number, | |
1048 | &event_status); | |
f517709d RW |
1049 | if (status == AE_OK) |
1050 | device->wakeup.flags.run_wake = | |
1051 | !!(event_status & ACPI_EVENT_FLAG_HANDLE); | |
1052 | } | |
1053 | ||
d57d09a4 | 1054 | static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
f517709d | 1055 | { |
d57d09a4 | 1056 | acpi_handle temp; |
f517709d | 1057 | acpi_status status = 0; |
e88c9c60 | 1058 | int err; |
29b71a1c | 1059 | |
d57d09a4 RW |
1060 | /* Presence of _PRW indicates wake capable */ |
1061 | status = acpi_get_handle(device->handle, "_PRW", &temp); | |
1062 | if (ACPI_FAILURE(status)) | |
1063 | return; | |
1064 | ||
e88c9c60 RW |
1065 | err = acpi_bus_extract_wakeup_device_power_package(device->handle, |
1066 | &device->wakeup); | |
1067 | if (err) { | |
1068 | dev_err(&device->dev, "_PRW evaluation error: %d\n", err); | |
d57d09a4 | 1069 | return; |
9e89dde2 | 1070 | } |
1da177e4 | 1071 | |
9e89dde2 | 1072 | device->wakeup.flags.valid = 1; |
9b83ccd2 | 1073 | device->wakeup.prepare_count = 0; |
f517709d | 1074 | acpi_bus_set_run_wake_flags(device); |
729b2bdb ZY |
1075 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
1076 | * system for the ACPI device with the _PRW object. | |
1077 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. | |
1078 | * So it is necessary to call _DSW object first. Only when it is not | |
1079 | * present will the _PSW object used. | |
1080 | */ | |
e88c9c60 RW |
1081 | err = acpi_device_sleep_wake(device, 0, 0, 0); |
1082 | if (err) | |
77e76609 RW |
1083 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
1084 | "error in _DSW or _PSW evaluation\n")); | |
1da177e4 | 1085 | } |
1da177e4 | 1086 | |
f33ce568 RW |
1087 | static void acpi_bus_init_power_state(struct acpi_device *device, int state) |
1088 | { | |
1089 | struct acpi_device_power_state *ps = &device->power.states[state]; | |
ef85bdbe RW |
1090 | char pathname[5] = { '_', 'P', 'R', '0' + state, '\0' }; |
1091 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
f33ce568 RW |
1092 | acpi_handle handle; |
1093 | acpi_status status; | |
bf325f95 | 1094 | |
f33ce568 RW |
1095 | INIT_LIST_HEAD(&ps->resources); |
1096 | ||
ef85bdbe RW |
1097 | /* Evaluate "_PRx" to get referenced power resources */ |
1098 | status = acpi_evaluate_object(device->handle, pathname, NULL, &buffer); | |
1099 | if (ACPI_SUCCESS(status)) { | |
1100 | union acpi_object *package = buffer.pointer; | |
1101 | ||
1102 | if (buffer.length && package | |
1103 | && package->type == ACPI_TYPE_PACKAGE | |
1104 | && package->package.count) { | |
e88c9c60 RW |
1105 | int err = acpi_extract_power_resources(package, 0, |
1106 | &ps->resources); | |
1107 | if (!err) | |
ef85bdbe | 1108 | device->power.flags.power_resources = 1; |
f33ce568 | 1109 | } |
ef85bdbe | 1110 | ACPI_FREE(buffer.pointer); |
f33ce568 RW |
1111 | } |
1112 | ||
1113 | /* Evaluate "_PSx" to see if we can do explicit sets */ | |
ef85bdbe RW |
1114 | pathname[2] = 'S'; |
1115 | status = acpi_get_handle(device->handle, pathname, &handle); | |
f33ce568 RW |
1116 | if (ACPI_SUCCESS(status)) |
1117 | ps->flags.explicit_set = 1; | |
1118 | ||
1119 | /* | |
1120 | * State is valid if there are means to put the device into it. | |
1121 | * D3hot is only valid if _PR3 present. | |
1122 | */ | |
ef85bdbe | 1123 | if (!list_empty(&ps->resources) |
f33ce568 RW |
1124 | || (ps->flags.explicit_set && state < ACPI_STATE_D3_HOT)) { |
1125 | ps->flags.valid = 1; | |
1126 | ps->flags.os_accessible = 1; | |
1127 | } | |
1128 | ||
1129 | ps->power = -1; /* Unknown - driver assigned */ | |
1130 | ps->latency = -1; /* Unknown - driver assigned */ | |
1131 | } | |
1132 | ||
d43e167d | 1133 | static void acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 1134 | { |
8bc5053b RW |
1135 | acpi_status status; |
1136 | acpi_handle handle; | |
1137 | u32 i; | |
1a365616 | 1138 | |
d43e167d RW |
1139 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ |
1140 | status = acpi_get_handle(device->handle, "_PS0", &handle); | |
1141 | if (ACPI_FAILURE(status)) { | |
1142 | status = acpi_get_handle(device->handle, "_PR0", &handle); | |
1143 | if (ACPI_FAILURE(status)) | |
1144 | return; | |
1145 | } | |
1146 | ||
1147 | device->flags.power_manageable = 1; | |
4be44fcd | 1148 | |
9e89dde2 ZR |
1149 | /* |
1150 | * Power Management Flags | |
1151 | */ | |
1152 | status = acpi_get_handle(device->handle, "_PSC", &handle); | |
1153 | if (ACPI_SUCCESS(status)) | |
1154 | device->power.flags.explicit_get = 1; | |
1155 | status = acpi_get_handle(device->handle, "_IRC", &handle); | |
1156 | if (ACPI_SUCCESS(status)) | |
1157 | device->power.flags.inrush_current = 1; | |
1da177e4 | 1158 | |
9e89dde2 ZR |
1159 | /* |
1160 | * Enumerate supported power management states | |
1161 | */ | |
f33ce568 RW |
1162 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) |
1163 | acpi_bus_init_power_state(device, i); | |
bf325f95 | 1164 | |
0b224527 | 1165 | INIT_LIST_HEAD(&device->power.states[ACPI_STATE_D3_COLD].resources); |
1da177e4 | 1166 | |
9e89dde2 ZR |
1167 | /* Set defaults for D0 and D3 states (always valid) */ |
1168 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
1169 | device->power.states[ACPI_STATE_D0].power = 100; | |
1170 | device->power.states[ACPI_STATE_D3].flags.valid = 1; | |
1171 | device->power.states[ACPI_STATE_D3].power = 0; | |
c8f7a62c | 1172 | |
5c7dd710 RW |
1173 | /* Set D3cold's explicit_set flag if _PS3 exists. */ |
1174 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set) | |
1175 | device->power.states[ACPI_STATE_D3_COLD].flags.explicit_set = 1; | |
1176 | ||
1399dfcd AL |
1177 | /* Presence of _PS3 or _PRx means we can put the device into D3 cold */ |
1178 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set || | |
1179 | device->power.flags.power_resources) | |
1180 | device->power.states[ACPI_STATE_D3_COLD].flags.os_accessible = 1; | |
1181 | ||
ade3e7fe | 1182 | acpi_bus_init_power(device); |
9e89dde2 | 1183 | } |
c8f7a62c | 1184 | |
d43e167d | 1185 | static void acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 1186 | { |
4be44fcd LB |
1187 | acpi_status status = AE_OK; |
1188 | acpi_handle temp = NULL; | |
1da177e4 | 1189 | |
1da177e4 LT |
1190 | /* Presence of _STA indicates 'dynamic_status' */ |
1191 | status = acpi_get_handle(device->handle, "_STA", &temp); | |
1192 | if (ACPI_SUCCESS(status)) | |
1193 | device->flags.dynamic_status = 1; | |
1194 | ||
1da177e4 LT |
1195 | /* Presence of _RMV indicates 'removable' */ |
1196 | status = acpi_get_handle(device->handle, "_RMV", &temp); | |
1197 | if (ACPI_SUCCESS(status)) | |
1198 | device->flags.removable = 1; | |
1199 | ||
1200 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
1201 | status = acpi_get_handle(device->handle, "_EJD", &temp); | |
1202 | if (ACPI_SUCCESS(status)) | |
1203 | device->flags.ejectable = 1; | |
1204 | else { | |
1205 | status = acpi_get_handle(device->handle, "_EJ0", &temp); | |
1206 | if (ACPI_SUCCESS(status)) | |
1207 | device->flags.ejectable = 1; | |
1208 | } | |
1da177e4 LT |
1209 | } |
1210 | ||
c7bcb4e9 | 1211 | static void acpi_device_get_busid(struct acpi_device *device) |
1da177e4 | 1212 | { |
4be44fcd LB |
1213 | char bus_id[5] = { '?', 0 }; |
1214 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
1215 | int i = 0; | |
1da177e4 LT |
1216 | |
1217 | /* | |
1218 | * Bus ID | |
1219 | * ------ | |
1220 | * The device's Bus ID is simply the object name. | |
1221 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
1222 | */ | |
859ac9a4 | 1223 | if (ACPI_IS_ROOT_DEVICE(device)) { |
1da177e4 | 1224 | strcpy(device->pnp.bus_id, "ACPI"); |
859ac9a4 BH |
1225 | return; |
1226 | } | |
1227 | ||
1228 | switch (device->device_type) { | |
1da177e4 LT |
1229 | case ACPI_BUS_TYPE_POWER_BUTTON: |
1230 | strcpy(device->pnp.bus_id, "PWRF"); | |
1231 | break; | |
1232 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
1233 | strcpy(device->pnp.bus_id, "SLPF"); | |
1234 | break; | |
1235 | default: | |
66b7ed40 | 1236 | acpi_get_name(device->handle, ACPI_SINGLE_NAME, &buffer); |
1da177e4 LT |
1237 | /* Clean up trailing underscores (if any) */ |
1238 | for (i = 3; i > 1; i--) { | |
1239 | if (bus_id[i] == '_') | |
1240 | bus_id[i] = '\0'; | |
1241 | else | |
1242 | break; | |
1243 | } | |
1244 | strcpy(device->pnp.bus_id, bus_id); | |
1245 | break; | |
1246 | } | |
1247 | } | |
1248 | ||
54735266 ZR |
1249 | /* |
1250 | * acpi_bay_match - see if a device is an ejectable driver bay | |
1251 | * | |
1252 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
1253 | * then we can safely call it an ejectable drive bay | |
1254 | */ | |
1255 | static int acpi_bay_match(struct acpi_device *device){ | |
1256 | acpi_status status; | |
1257 | acpi_handle handle; | |
1258 | acpi_handle tmp; | |
1259 | acpi_handle phandle; | |
1260 | ||
1261 | handle = device->handle; | |
1262 | ||
1263 | status = acpi_get_handle(handle, "_EJ0", &tmp); | |
1264 | if (ACPI_FAILURE(status)) | |
1265 | return -ENODEV; | |
1266 | ||
1267 | if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || | |
1268 | (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || | |
1269 | (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || | |
1270 | (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) | |
1271 | return 0; | |
1272 | ||
1273 | if (acpi_get_parent(handle, &phandle)) | |
1274 | return -ENODEV; | |
1275 | ||
1276 | if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) || | |
1277 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) || | |
1278 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) || | |
1279 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp)))) | |
1280 | return 0; | |
1281 | ||
1282 | return -ENODEV; | |
1283 | } | |
1284 | ||
3620f2f2 FS |
1285 | /* |
1286 | * acpi_dock_match - see if a device has a _DCK method | |
1287 | */ | |
1288 | static int acpi_dock_match(struct acpi_device *device) | |
1289 | { | |
1290 | acpi_handle tmp; | |
1291 | return acpi_get_handle(device->handle, "_DCK", &tmp); | |
1292 | } | |
1293 | ||
620e112c | 1294 | const char *acpi_device_hid(struct acpi_device *device) |
15b8dd53 | 1295 | { |
7f47fa6c | 1296 | struct acpi_hardware_id *hid; |
15b8dd53 | 1297 | |
2b2ae7c7 TR |
1298 | if (list_empty(&device->pnp.ids)) |
1299 | return dummy_hid; | |
1300 | ||
7f47fa6c BH |
1301 | hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list); |
1302 | return hid->id; | |
1303 | } | |
1304 | EXPORT_SYMBOL(acpi_device_hid); | |
15b8dd53 | 1305 | |
7f47fa6c BH |
1306 | static void acpi_add_id(struct acpi_device *device, const char *dev_id) |
1307 | { | |
1308 | struct acpi_hardware_id *id; | |
15b8dd53 | 1309 | |
7f47fa6c BH |
1310 | id = kmalloc(sizeof(*id), GFP_KERNEL); |
1311 | if (!id) | |
1312 | return; | |
15b8dd53 | 1313 | |
581de59e | 1314 | id->id = kstrdup(dev_id, GFP_KERNEL); |
7f47fa6c BH |
1315 | if (!id->id) { |
1316 | kfree(id); | |
1317 | return; | |
15b8dd53 BM |
1318 | } |
1319 | ||
7f47fa6c | 1320 | list_add_tail(&id->list, &device->pnp.ids); |
15b8dd53 BM |
1321 | } |
1322 | ||
222e82ac DW |
1323 | /* |
1324 | * Old IBM workstations have a DSDT bug wherein the SMBus object | |
1325 | * lacks the SMBUS01 HID and the methods do not have the necessary "_" | |
1326 | * prefix. Work around this. | |
1327 | */ | |
1328 | static int acpi_ibm_smbus_match(struct acpi_device *device) | |
1329 | { | |
1330 | acpi_handle h_dummy; | |
1331 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
1332 | int result; | |
1333 | ||
1334 | if (!dmi_name_in_vendors("IBM")) | |
1335 | return -ENODEV; | |
1336 | ||
1337 | /* Look for SMBS object */ | |
1338 | result = acpi_get_name(device->handle, ACPI_SINGLE_NAME, &path); | |
1339 | if (result) | |
1340 | return result; | |
1341 | ||
1342 | if (strcmp("SMBS", path.pointer)) { | |
1343 | result = -ENODEV; | |
1344 | goto out; | |
1345 | } | |
1346 | ||
1347 | /* Does it have the necessary (but misnamed) methods? */ | |
1348 | result = -ENODEV; | |
1349 | if (ACPI_SUCCESS(acpi_get_handle(device->handle, "SBI", &h_dummy)) && | |
1350 | ACPI_SUCCESS(acpi_get_handle(device->handle, "SBR", &h_dummy)) && | |
1351 | ACPI_SUCCESS(acpi_get_handle(device->handle, "SBW", &h_dummy))) | |
1352 | result = 0; | |
1353 | out: | |
1354 | kfree(path.pointer); | |
1355 | return result; | |
1356 | } | |
1357 | ||
c7bcb4e9 | 1358 | static void acpi_device_set_id(struct acpi_device *device) |
1da177e4 | 1359 | { |
4be44fcd | 1360 | acpi_status status; |
57f3674f | 1361 | struct acpi_device_info *info; |
78e25fef | 1362 | struct acpi_pnp_device_id_list *cid_list; |
7f47fa6c | 1363 | int i; |
1da177e4 | 1364 | |
c7bcb4e9 | 1365 | switch (device->device_type) { |
1da177e4 | 1366 | case ACPI_BUS_TYPE_DEVICE: |
859ac9a4 | 1367 | if (ACPI_IS_ROOT_DEVICE(device)) { |
57f3674f | 1368 | acpi_add_id(device, ACPI_SYSTEM_HID); |
859ac9a4 BH |
1369 | break; |
1370 | } | |
1371 | ||
66b7ed40 | 1372 | status = acpi_get_object_info(device->handle, &info); |
1da177e4 | 1373 | if (ACPI_FAILURE(status)) { |
96b2dd1f | 1374 | printk(KERN_ERR PREFIX "%s: Error reading device info\n", __func__); |
1da177e4 LT |
1375 | return; |
1376 | } | |
1377 | ||
1da177e4 | 1378 | if (info->valid & ACPI_VALID_HID) |
57f3674f BH |
1379 | acpi_add_id(device, info->hardware_id.string); |
1380 | if (info->valid & ACPI_VALID_CID) { | |
15b8dd53 | 1381 | cid_list = &info->compatible_id_list; |
57f3674f BH |
1382 | for (i = 0; i < cid_list->count; i++) |
1383 | acpi_add_id(device, cid_list->ids[i].string); | |
1384 | } | |
1da177e4 LT |
1385 | if (info->valid & ACPI_VALID_ADR) { |
1386 | device->pnp.bus_address = info->address; | |
1387 | device->flags.bus_address = 1; | |
1388 | } | |
ccf78040 LZ |
1389 | if (info->valid & ACPI_VALID_UID) |
1390 | device->pnp.unique_id = kstrdup(info->unique_id.string, | |
1391 | GFP_KERNEL); | |
ae843332 | 1392 | |
a83893ae BH |
1393 | kfree(info); |
1394 | ||
57f3674f BH |
1395 | /* |
1396 | * Some devices don't reliably have _HIDs & _CIDs, so add | |
1397 | * synthetic HIDs to make sure drivers can find them. | |
1398 | */ | |
c3d6de69 | 1399 | if (acpi_is_video_device(device)) |
57f3674f | 1400 | acpi_add_id(device, ACPI_VIDEO_HID); |
3620f2f2 | 1401 | else if (ACPI_SUCCESS(acpi_bay_match(device))) |
57f3674f | 1402 | acpi_add_id(device, ACPI_BAY_HID); |
3620f2f2 | 1403 | else if (ACPI_SUCCESS(acpi_dock_match(device))) |
57f3674f | 1404 | acpi_add_id(device, ACPI_DOCK_HID); |
222e82ac DW |
1405 | else if (!acpi_ibm_smbus_match(device)) |
1406 | acpi_add_id(device, ACPI_SMBUS_IBM_HID); | |
4f5f64cf | 1407 | else if (list_empty(&device->pnp.ids) && |
b7b30de5 BH |
1408 | ACPI_IS_ROOT_DEVICE(device->parent)) { |
1409 | acpi_add_id(device, ACPI_BUS_HID); /* \_SB, LNXSYBUS */ | |
1410 | strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME); | |
1411 | strcpy(device->pnp.device_class, ACPI_BUS_CLASS); | |
1412 | } | |
54735266 | 1413 | |
1da177e4 LT |
1414 | break; |
1415 | case ACPI_BUS_TYPE_POWER: | |
57f3674f | 1416 | acpi_add_id(device, ACPI_POWER_HID); |
1da177e4 LT |
1417 | break; |
1418 | case ACPI_BUS_TYPE_PROCESSOR: | |
57f3674f | 1419 | acpi_add_id(device, ACPI_PROCESSOR_OBJECT_HID); |
1da177e4 | 1420 | break; |
1da177e4 | 1421 | case ACPI_BUS_TYPE_THERMAL: |
57f3674f | 1422 | acpi_add_id(device, ACPI_THERMAL_HID); |
1da177e4 LT |
1423 | break; |
1424 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
57f3674f | 1425 | acpi_add_id(device, ACPI_BUTTON_HID_POWERF); |
1da177e4 LT |
1426 | break; |
1427 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
57f3674f | 1428 | acpi_add_id(device, ACPI_BUTTON_HID_SLEEPF); |
1da177e4 LT |
1429 | break; |
1430 | } | |
1da177e4 LT |
1431 | } |
1432 | ||
82c7d5ef RW |
1433 | void acpi_init_device_object(struct acpi_device *device, acpi_handle handle, |
1434 | int type, unsigned long long sta) | |
1da177e4 | 1435 | { |
d43e167d RW |
1436 | INIT_LIST_HEAD(&device->pnp.ids); |
1437 | device->device_type = type; | |
1438 | device->handle = handle; | |
1439 | device->parent = acpi_bus_get_parent(handle); | |
1440 | STRUCT_TO_INT(device->status) = sta; | |
1441 | acpi_device_get_busid(device); | |
1442 | acpi_device_set_id(device); | |
1443 | acpi_bus_get_flags(device); | |
cf860be6 RW |
1444 | device_initialize(&device->dev); |
1445 | dev_set_uevent_suppress(&device->dev, true); | |
1446 | } | |
bc3b0772 | 1447 | |
cf860be6 RW |
1448 | void acpi_device_add_finalize(struct acpi_device *device) |
1449 | { | |
1450 | dev_set_uevent_suppress(&device->dev, false); | |
1451 | kobject_uevent(&device->dev.kobj, KOBJ_ADD); | |
1da177e4 LT |
1452 | } |
1453 | ||
5c478f49 BH |
1454 | static int acpi_add_single_object(struct acpi_device **child, |
1455 | acpi_handle handle, int type, | |
209d3b17 | 1456 | unsigned long long sta, bool match_driver) |
1da177e4 | 1457 | { |
77c24888 BH |
1458 | int result; |
1459 | struct acpi_device *device; | |
29aaefa6 | 1460 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 1461 | |
36bcbec7 | 1462 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 1463 | if (!device) { |
6468463a | 1464 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 1465 | return -ENOMEM; |
1da177e4 | 1466 | } |
1da177e4 | 1467 | |
d43e167d RW |
1468 | acpi_init_device_object(device, handle, type, sta); |
1469 | acpi_bus_get_power_flags(device); | |
d57d09a4 | 1470 | acpi_bus_get_wakeup_device_flags(device); |
1da177e4 | 1471 | |
209d3b17 | 1472 | device->flags.match_driver = match_driver; |
cf860be6 | 1473 | result = acpi_device_add(device, acpi_device_release); |
d43e167d | 1474 | if (result) { |
718fb0de | 1475 | acpi_device_release(&device->dev); |
d43e167d RW |
1476 | return result; |
1477 | } | |
1da177e4 | 1478 | |
d43e167d | 1479 | acpi_power_add_remove_device(device, true); |
cf860be6 | 1480 | acpi_device_add_finalize(device); |
d43e167d RW |
1481 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); |
1482 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Added %s [%s] parent %s\n", | |
1483 | dev_name(&device->dev), (char *) buffer.pointer, | |
1484 | device->parent ? dev_name(&device->parent->dev) : "(null)")); | |
1485 | kfree(buffer.pointer); | |
1486 | *child = device; | |
1487 | return 0; | |
bf325f95 RW |
1488 | } |
1489 | ||
778cbc1d BH |
1490 | static int acpi_bus_type_and_status(acpi_handle handle, int *type, |
1491 | unsigned long long *sta) | |
1da177e4 | 1492 | { |
778cbc1d BH |
1493 | acpi_status status; |
1494 | acpi_object_type acpi_type; | |
1da177e4 | 1495 | |
778cbc1d | 1496 | status = acpi_get_type(handle, &acpi_type); |
51a85faf | 1497 | if (ACPI_FAILURE(status)) |
778cbc1d | 1498 | return -ENODEV; |
4be44fcd | 1499 | |
778cbc1d | 1500 | switch (acpi_type) { |
51a85faf BH |
1501 | case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */ |
1502 | case ACPI_TYPE_DEVICE: | |
778cbc1d BH |
1503 | *type = ACPI_BUS_TYPE_DEVICE; |
1504 | status = acpi_bus_get_status_handle(handle, sta); | |
1505 | if (ACPI_FAILURE(status)) | |
1506 | return -ENODEV; | |
51a85faf BH |
1507 | break; |
1508 | case ACPI_TYPE_PROCESSOR: | |
778cbc1d BH |
1509 | *type = ACPI_BUS_TYPE_PROCESSOR; |
1510 | status = acpi_bus_get_status_handle(handle, sta); | |
1511 | if (ACPI_FAILURE(status)) | |
1512 | return -ENODEV; | |
51a85faf BH |
1513 | break; |
1514 | case ACPI_TYPE_THERMAL: | |
778cbc1d BH |
1515 | *type = ACPI_BUS_TYPE_THERMAL; |
1516 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1517 | break; |
1518 | case ACPI_TYPE_POWER: | |
778cbc1d BH |
1519 | *type = ACPI_BUS_TYPE_POWER; |
1520 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1521 | break; |
1522 | default: | |
778cbc1d | 1523 | return -ENODEV; |
51a85faf | 1524 | } |
1da177e4 | 1525 | |
778cbc1d BH |
1526 | return 0; |
1527 | } | |
1528 | ||
e3863094 RW |
1529 | static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used, |
1530 | void *not_used, void **return_value) | |
778cbc1d | 1531 | { |
805d410f | 1532 | struct acpi_device *device = NULL; |
778cbc1d BH |
1533 | int type; |
1534 | unsigned long long sta; | |
e3b87f8a | 1535 | acpi_status status; |
778cbc1d BH |
1536 | int result; |
1537 | ||
4002bf38 RW |
1538 | acpi_bus_get_device(handle, &device); |
1539 | if (device) | |
1540 | goto out; | |
1541 | ||
778cbc1d BH |
1542 | result = acpi_bus_type_and_status(handle, &type, &sta); |
1543 | if (result) | |
1544 | return AE_OK; | |
1545 | ||
82c7d5ef RW |
1546 | if (type == ACPI_BUS_TYPE_POWER) { |
1547 | acpi_add_power_resource(handle); | |
1548 | return AE_OK; | |
1549 | } | |
1550 | ||
778cbc1d | 1551 | if (!(sta & ACPI_STA_DEVICE_PRESENT) && |
b581a7f9 | 1552 | !(sta & ACPI_STA_DEVICE_FUNCTIONING)) { |
86e4e20e RW |
1553 | struct acpi_device_wakeup wakeup; |
1554 | acpi_handle temp; | |
1555 | ||
1556 | status = acpi_get_handle(handle, "_PRW", &temp); | |
993cbe59 | 1557 | if (ACPI_SUCCESS(status)) { |
86e4e20e RW |
1558 | acpi_bus_extract_wakeup_device_power_package(handle, |
1559 | &wakeup); | |
993cbe59 RW |
1560 | acpi_power_resources_list_free(&wakeup.resources); |
1561 | } | |
778cbc1d | 1562 | return AE_CTRL_DEPTH; |
b581a7f9 | 1563 | } |
778cbc1d | 1564 | |
82c7d5ef | 1565 | acpi_add_single_object(&device, handle, type, sta, false); |
e3b87f8a | 1566 | if (!device) |
51a85faf | 1567 | return AE_CTRL_DEPTH; |
1da177e4 | 1568 | |
209d3b17 | 1569 | device->flags.match_driver = true; |
1da177e4 | 1570 | |
4002bf38 | 1571 | out: |
51a85faf BH |
1572 | if (!*return_value) |
1573 | *return_value = device; | |
805d410f | 1574 | |
51a85faf BH |
1575 | return AE_OK; |
1576 | } | |
3fb02738 | 1577 | |
0fc300b0 RW |
1578 | static acpi_status acpi_bus_device_attach(acpi_handle handle, u32 lvl_not_used, |
1579 | void *not_used, void **ret_not_used) | |
51a85faf | 1580 | { |
805d410f RW |
1581 | acpi_status status = AE_OK; |
1582 | struct acpi_device *device; | |
1583 | unsigned long long sta_not_used; | |
1584 | int type_not_used; | |
3fb02738 | 1585 | |
805d410f RW |
1586 | /* |
1587 | * Ignore errors ignored by acpi_bus_check_add() to avoid terminating | |
1588 | * namespace walks prematurely. | |
1589 | */ | |
1590 | if (acpi_bus_type_and_status(handle, &type_not_used, &sta_not_used)) | |
1591 | return AE_OK; | |
1da177e4 | 1592 | |
805d410f RW |
1593 | if (acpi_bus_get_device(handle, &device)) |
1594 | return AE_CTRL_DEPTH; | |
7779688f | 1595 | |
0fc300b0 RW |
1596 | if (!acpi_match_device_ids(device, acpi_platform_device_ids)) { |
1597 | /* This is a known good platform device. */ | |
1598 | acpi_create_platform_device(device); | |
abe99210 | 1599 | } else if (device_attach(&device->dev) < 0) { |
0fc300b0 | 1600 | status = AE_CTRL_DEPTH; |
805d410f RW |
1601 | } |
1602 | return status; | |
1da177e4 | 1603 | } |
1da177e4 | 1604 | |
636458de | 1605 | /** |
b8bd759a | 1606 | * acpi_bus_scan - Add ACPI device node objects in a given namespace scope. |
636458de | 1607 | * @handle: Root of the namespace scope to scan. |
7779688f | 1608 | * |
636458de RW |
1609 | * Scan a given ACPI tree (probably recently hot-plugged) and create and add |
1610 | * found devices. | |
7779688f | 1611 | * |
636458de RW |
1612 | * If no devices were found, -ENODEV is returned, but it does not mean that |
1613 | * there has been a real error. There just have been no suitable ACPI objects | |
1614 | * in the table trunk from which the kernel could create a device and add an | |
1615 | * appropriate driver. | |
7779688f | 1616 | */ |
b8bd759a | 1617 | int acpi_bus_scan(acpi_handle handle) |
3fb02738 | 1618 | { |
b8bd759a | 1619 | void *device = NULL; |
3fb02738 | 1620 | |
b8bd759a RW |
1621 | if (ACPI_SUCCESS(acpi_bus_check_add(handle, 0, NULL, &device))) |
1622 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
1623 | acpi_bus_check_add, NULL, NULL, &device); | |
3fb02738 | 1624 | |
d2f6650a | 1625 | if (!device) |
b8bd759a | 1626 | return -ENODEV; |
a2100801 | 1627 | |
b8bd759a RW |
1628 | if (ACPI_SUCCESS(acpi_bus_device_attach(handle, 0, NULL, NULL))) |
1629 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
1630 | acpi_bus_device_attach, NULL, NULL, NULL); | |
a2100801 | 1631 | |
0fc300b0 | 1632 | return 0; |
3fb02738 | 1633 | } |
b8bd759a | 1634 | EXPORT_SYMBOL(acpi_bus_scan); |
1da177e4 | 1635 | |
05404d8f RW |
1636 | static acpi_status acpi_bus_device_detach(acpi_handle handle, u32 lvl_not_used, |
1637 | void *not_used, void **ret_not_used) | |
1da177e4 | 1638 | { |
05404d8f | 1639 | struct acpi_device *device = NULL; |
4be44fcd | 1640 | |
05404d8f RW |
1641 | if (!acpi_bus_get_device(handle, &device)) { |
1642 | device->removal_type = ACPI_BUS_REMOVAL_EJECT; | |
1643 | device_release_driver(&device->dev); | |
1644 | } | |
1645 | return AE_OK; | |
1646 | } | |
1da177e4 | 1647 | |
05404d8f RW |
1648 | static acpi_status acpi_bus_remove(acpi_handle handle, u32 lvl_not_used, |
1649 | void *not_used, void **ret_not_used) | |
1650 | { | |
1651 | struct acpi_device *device = NULL; | |
1da177e4 | 1652 | |
05404d8f RW |
1653 | if (!acpi_bus_get_device(handle, &device)) |
1654 | acpi_device_unregister(device); | |
1da177e4 | 1655 | |
05404d8f RW |
1656 | return AE_OK; |
1657 | } | |
1da177e4 | 1658 | |
ae281795 | 1659 | int acpi_bus_trim(struct acpi_device *start) |
1da177e4 | 1660 | { |
05404d8f RW |
1661 | /* |
1662 | * Execute acpi_bus_device_detach() as a post-order callback to detach | |
1663 | * all ACPI drivers from the device nodes being removed. | |
1664 | */ | |
1665 | acpi_walk_namespace(ACPI_TYPE_ANY, start->handle, ACPI_UINT32_MAX, NULL, | |
1666 | acpi_bus_device_detach, NULL, NULL); | |
1667 | acpi_bus_device_detach(start->handle, 0, NULL, NULL); | |
cecdb193 RW |
1668 | /* |
1669 | * Execute acpi_bus_remove() as a post-order callback to remove device | |
1670 | * nodes in the given namespace scope. | |
1671 | */ | |
1672 | acpi_walk_namespace(ACPI_TYPE_ANY, start->handle, ACPI_UINT32_MAX, NULL, | |
1673 | acpi_bus_remove, NULL, NULL); | |
1674 | acpi_bus_remove(start->handle, 0, NULL, NULL); | |
1675 | return 0; | |
1da177e4 | 1676 | } |
ceaba663 KA |
1677 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
1678 | ||
e8b945c9 | 1679 | static int acpi_bus_scan_fixed(void) |
1da177e4 | 1680 | { |
4be44fcd LB |
1681 | int result = 0; |
1682 | struct acpi_device *device = NULL; | |
c4168bff | 1683 | |
1da177e4 LT |
1684 | /* |
1685 | * Enumerate all fixed-feature devices. | |
1686 | */ | |
cee324b1 | 1687 | if ((acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON) == 0) { |
5c478f49 | 1688 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1689 | ACPI_BUS_TYPE_POWER_BUTTON, |
209d3b17 | 1690 | ACPI_STA_DEFAULT, true); |
c10d7a13 | 1691 | device_init_wakeup(&device->dev, true); |
3fb02738 | 1692 | } |
1da177e4 | 1693 | |
cee324b1 | 1694 | if ((acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON) == 0) { |
5c478f49 | 1695 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1696 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
209d3b17 | 1697 | ACPI_STA_DEFAULT, true); |
3fb02738 | 1698 | } |
1da177e4 | 1699 | |
d550d98d | 1700 | return result; |
1da177e4 LT |
1701 | } |
1702 | ||
e747f274 | 1703 | int __init acpi_scan_init(void) |
1da177e4 LT |
1704 | { |
1705 | int result; | |
1da177e4 | 1706 | |
5b327265 PM |
1707 | result = bus_register(&acpi_bus_type); |
1708 | if (result) { | |
1709 | /* We don't want to quit even if we failed to add suspend/resume */ | |
1710 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
1711 | } | |
1712 | ||
92ef2a25 | 1713 | acpi_pci_root_init(); |
97d9a9e9 | 1714 | |
1da177e4 LT |
1715 | /* |
1716 | * Enumerate devices in the ACPI namespace. | |
1717 | */ | |
0cd6ac52 RW |
1718 | result = acpi_bus_scan(ACPI_ROOT_OBJECT); |
1719 | if (result) | |
1720 | return result; | |
1da177e4 | 1721 | |
0cd6ac52 | 1722 | result = acpi_bus_get_device(ACPI_ROOT_OBJECT, &acpi_root); |
1da177e4 | 1723 | if (result) |
b8bd759a | 1724 | return result; |
1da177e4 | 1725 | |
b8bd759a RW |
1726 | result = acpi_bus_scan_fixed(); |
1727 | if (result) { | |
b17b537a | 1728 | acpi_device_unregister(acpi_root); |
b8bd759a RW |
1729 | return result; |
1730 | } | |
1da177e4 | 1731 | |
b8bd759a RW |
1732 | acpi_update_all_gpes(); |
1733 | return 0; | |
1da177e4 | 1734 | } |