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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 | |
1da177e4 | 32 | static LIST_HEAD(acpi_device_list); |
e49bd2dd | 33 | static LIST_HEAD(acpi_bus_id_list); |
c511cc19 | 34 | static DEFINE_MUTEX(acpi_scan_lock); |
ca589f94 | 35 | static LIST_HEAD(acpi_scan_handlers_list); |
9090589d | 36 | DEFINE_MUTEX(acpi_device_lock); |
1da177e4 LT |
37 | LIST_HEAD(acpi_wakeup_device_list); |
38 | ||
e49bd2dd | 39 | struct acpi_device_bus_id{ |
bb095854 | 40 | char bus_id[15]; |
e49bd2dd ZR |
41 | unsigned int instance_no; |
42 | struct list_head node; | |
1da177e4 | 43 | }; |
29b71a1c | 44 | |
ca589f94 RW |
45 | int acpi_scan_add_handler(struct acpi_scan_handler *handler) |
46 | { | |
47 | if (!handler || !handler->attach) | |
48 | return -EINVAL; | |
49 | ||
50 | list_add_tail(&handler->list_node, &acpi_scan_handlers_list); | |
51 | return 0; | |
52 | } | |
53 | ||
29b71a1c TR |
54 | /* |
55 | * Creates hid/cid(s) string needed for modalias and uevent | |
56 | * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: | |
57 | * char *modalias: "acpi:IBM0001:ACPI0001" | |
58 | */ | |
b3e572d2 AB |
59 | static int create_modalias(struct acpi_device *acpi_dev, char *modalias, |
60 | int size) | |
61 | { | |
29b71a1c | 62 | int len; |
5c9fcb5d | 63 | int count; |
7f47fa6c | 64 | struct acpi_hardware_id *id; |
29b71a1c | 65 | |
2b2ae7c7 TR |
66 | if (list_empty(&acpi_dev->pnp.ids)) |
67 | return 0; | |
68 | ||
5c9fcb5d | 69 | len = snprintf(modalias, size, "acpi:"); |
29b71a1c TR |
70 | size -= len; |
71 | ||
7f47fa6c BH |
72 | list_for_each_entry(id, &acpi_dev->pnp.ids, list) { |
73 | count = snprintf(&modalias[len], size, "%s:", id->id); | |
5c9fcb5d ZR |
74 | if (count < 0 || count >= size) |
75 | return -EINVAL; | |
76 | len += count; | |
77 | size -= count; | |
78 | } | |
79 | ||
29b71a1c TR |
80 | modalias[len] = '\0'; |
81 | return len; | |
82 | } | |
83 | ||
84 | static ssize_t | |
85 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
86 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
87 | int len; | |
88 | ||
89 | /* Device has no HID and no CID or string is >1024 */ | |
90 | len = create_modalias(acpi_dev, buf, 1024); | |
91 | if (len <= 0) | |
92 | return 0; | |
93 | buf[len++] = '\n'; | |
94 | return len; | |
95 | } | |
96 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); | |
97 | ||
f058cdf4 RW |
98 | static void __acpi_bus_trim(struct acpi_device *start); |
99 | ||
c4753e57 TK |
100 | /** |
101 | * acpi_bus_hot_remove_device: hot-remove a device and its children | |
102 | * @context: struct acpi_eject_event pointer (freed in this func) | |
103 | * | |
104 | * Hot-remove a device and its children. This function frees up the | |
105 | * memory space passed by arg context, so that the caller may call | |
106 | * this function asynchronously through acpi_os_hotplug_execute(). | |
107 | */ | |
108 | void acpi_bus_hot_remove_device(void *context) | |
1da177e4 | 109 | { |
c4753e57 | 110 | struct acpi_eject_event *ej_event = (struct acpi_eject_event *) context; |
5993c467 YL |
111 | struct acpi_device *device = ej_event->device; |
112 | acpi_handle handle = device->handle; | |
b3c450c3 | 113 | acpi_handle temp; |
1da177e4 LT |
114 | struct acpi_object_list arg_list; |
115 | union acpi_object arg; | |
116 | acpi_status status = AE_OK; | |
c4753e57 | 117 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; /* default */ |
1da177e4 | 118 | |
f058cdf4 RW |
119 | mutex_lock(&acpi_scan_lock); |
120 | ||
26d46867 | 121 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
0794469d | 122 | "Hot-removing device %s...\n", dev_name(&device->dev))); |
26d46867 | 123 | |
f058cdf4 | 124 | __acpi_bus_trim(device); |
bfee26db | 125 | /* Device node has been released. */ |
b3c450c3 TK |
126 | device = NULL; |
127 | ||
26d46867 ZR |
128 | /* power off device */ |
129 | status = acpi_evaluate_object(handle, "_PS3", NULL, NULL); | |
130 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) | |
55ac9a01 LM |
131 | printk(KERN_WARNING PREFIX |
132 | "Power-off device failed\n"); | |
26d46867 | 133 | |
b3c450c3 | 134 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_LCK", &temp))) { |
1da177e4 LT |
135 | arg_list.count = 1; |
136 | arg_list.pointer = &arg; | |
137 | arg.type = ACPI_TYPE_INTEGER; | |
138 | arg.integer.value = 0; | |
139 | acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); | |
140 | } | |
1da177e4 | 141 | |
1da177e4 LT |
142 | arg_list.count = 1; |
143 | arg_list.pointer = &arg; | |
144 | arg.type = ACPI_TYPE_INTEGER; | |
145 | arg.integer.value = 1; | |
1da177e4 | 146 | |
1da177e4 LT |
147 | /* |
148 | * TBD: _EJD support. | |
149 | */ | |
1da177e4 | 150 | status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); |
c4753e57 TK |
151 | if (ACPI_FAILURE(status)) { |
152 | if (status != AE_NOT_FOUND) | |
f058cdf4 | 153 | acpi_handle_warn(handle, "Eject failed\n"); |
1da177e4 | 154 | |
f058cdf4 RW |
155 | /* Tell the firmware the hot-remove operation has failed. */ |
156 | acpi_evaluate_hotplug_ost(handle, ej_event->event, | |
157 | ost_code, NULL); | |
158 | } | |
1da177e4 | 159 | |
f058cdf4 | 160 | mutex_unlock(&acpi_scan_lock); |
c4753e57 | 161 | kfree(context); |
c8d72a5e | 162 | return; |
1da177e4 | 163 | } |
61622acc | 164 | EXPORT_SYMBOL(acpi_bus_hot_remove_device); |
1da177e4 | 165 | |
836aedb1 RW |
166 | static ssize_t real_power_state_show(struct device *dev, |
167 | struct device_attribute *attr, char *buf) | |
168 | { | |
169 | struct acpi_device *adev = to_acpi_device(dev); | |
170 | int state; | |
171 | int ret; | |
172 | ||
173 | ret = acpi_device_get_power(adev, &state); | |
174 | if (ret) | |
175 | return ret; | |
176 | ||
177 | return sprintf(buf, "%s\n", acpi_power_state_string(state)); | |
178 | } | |
179 | ||
180 | static DEVICE_ATTR(real_power_state, 0444, real_power_state_show, NULL); | |
181 | ||
182 | static ssize_t power_state_show(struct device *dev, | |
183 | struct device_attribute *attr, char *buf) | |
184 | { | |
185 | struct acpi_device *adev = to_acpi_device(dev); | |
186 | ||
187 | return sprintf(buf, "%s\n", acpi_power_state_string(adev->power.state)); | |
188 | } | |
189 | ||
190 | static DEVICE_ATTR(power_state, 0444, power_state_show, NULL); | |
191 | ||
1da177e4 | 192 | static ssize_t |
f883d9db PM |
193 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
194 | const char *buf, size_t count) | |
1da177e4 | 195 | { |
4be44fcd | 196 | int ret = count; |
4be44fcd | 197 | acpi_status status; |
4be44fcd | 198 | acpi_object_type type = 0; |
f883d9db | 199 | struct acpi_device *acpi_device = to_acpi_device(d); |
c4753e57 | 200 | struct acpi_eject_event *ej_event; |
1da177e4 | 201 | |
1da177e4 LT |
202 | if ((!count) || (buf[0] != '1')) { |
203 | return -EINVAL; | |
204 | } | |
ce7685ad | 205 | if (!acpi_device->driver && !acpi_device->handler) { |
1da177e4 LT |
206 | ret = -ENODEV; |
207 | goto err; | |
208 | } | |
f883d9db PM |
209 | status = acpi_get_type(acpi_device->handle, &type); |
210 | if (ACPI_FAILURE(status) || (!acpi_device->flags.ejectable)) { | |
1da177e4 LT |
211 | ret = -ENODEV; |
212 | goto err; | |
213 | } | |
1da177e4 | 214 | |
c4753e57 TK |
215 | ej_event = kmalloc(sizeof(*ej_event), GFP_KERNEL); |
216 | if (!ej_event) { | |
217 | ret = -ENOMEM; | |
218 | goto err; | |
219 | } | |
220 | ||
5993c467 | 221 | ej_event->device = acpi_device; |
c4753e57 TK |
222 | if (acpi_device->flags.eject_pending) { |
223 | /* event originated from ACPI eject notification */ | |
224 | ej_event->event = ACPI_NOTIFY_EJECT_REQUEST; | |
225 | acpi_device->flags.eject_pending = 0; | |
226 | } else { | |
227 | /* event originated from user */ | |
228 | ej_event->event = ACPI_OST_EC_OSPM_EJECT; | |
5993c467 | 229 | (void) acpi_evaluate_hotplug_ost(acpi_device->handle, |
c4753e57 TK |
230 | ej_event->event, ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); |
231 | } | |
232 | ||
233 | acpi_os_hotplug_execute(acpi_bus_hot_remove_device, (void *)ej_event); | |
74523c90 | 234 | err: |
1da177e4 | 235 | return ret; |
1da177e4 LT |
236 | } |
237 | ||
f883d9db | 238 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
1da177e4 | 239 | |
e49bd2dd ZR |
240 | static ssize_t |
241 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
242 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1da177e4 | 243 | |
ea8d82fd | 244 | return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev)); |
1da177e4 | 245 | } |
e49bd2dd | 246 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
1da177e4 | 247 | |
923d4a45 LZ |
248 | static ssize_t acpi_device_uid_show(struct device *dev, |
249 | struct device_attribute *attr, char *buf) | |
250 | { | |
251 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
252 | ||
253 | return sprintf(buf, "%s\n", acpi_dev->pnp.unique_id); | |
254 | } | |
255 | static DEVICE_ATTR(uid, 0444, acpi_device_uid_show, NULL); | |
256 | ||
257 | static ssize_t acpi_device_adr_show(struct device *dev, | |
258 | struct device_attribute *attr, char *buf) | |
259 | { | |
260 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
261 | ||
262 | return sprintf(buf, "0x%08x\n", | |
263 | (unsigned int)(acpi_dev->pnp.bus_address)); | |
264 | } | |
265 | static DEVICE_ATTR(adr, 0444, acpi_device_adr_show, NULL); | |
266 | ||
e49bd2dd ZR |
267 | static ssize_t |
268 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
269 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
270 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
271 | int result; | |
1da177e4 | 272 | |
e49bd2dd | 273 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
0c526d96 | 274 | if (result) |
e49bd2dd | 275 | goto end; |
1da177e4 | 276 | |
e49bd2dd ZR |
277 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
278 | kfree(path.pointer); | |
0c526d96 | 279 | end: |
e49bd2dd | 280 | return result; |
1da177e4 | 281 | } |
e49bd2dd | 282 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
1da177e4 | 283 | |
d1efe3c3 LO |
284 | /* sysfs file that shows description text from the ACPI _STR method */ |
285 | static ssize_t description_show(struct device *dev, | |
286 | struct device_attribute *attr, | |
287 | char *buf) { | |
288 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
289 | int result; | |
290 | ||
291 | if (acpi_dev->pnp.str_obj == NULL) | |
292 | return 0; | |
293 | ||
294 | /* | |
295 | * The _STR object contains a Unicode identifier for a device. | |
296 | * We need to convert to utf-8 so it can be displayed. | |
297 | */ | |
298 | result = utf16s_to_utf8s( | |
299 | (wchar_t *)acpi_dev->pnp.str_obj->buffer.pointer, | |
300 | acpi_dev->pnp.str_obj->buffer.length, | |
301 | UTF16_LITTLE_ENDIAN, buf, | |
302 | PAGE_SIZE); | |
303 | ||
304 | buf[result++] = '\n'; | |
305 | ||
306 | return result; | |
307 | } | |
308 | static DEVICE_ATTR(description, 0444, description_show, NULL); | |
309 | ||
bb74ac23 YI |
310 | static ssize_t |
311 | acpi_device_sun_show(struct device *dev, struct device_attribute *attr, | |
312 | char *buf) { | |
313 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
314 | ||
315 | return sprintf(buf, "%lu\n", acpi_dev->pnp.sun); | |
316 | } | |
317 | static DEVICE_ATTR(sun, 0444, acpi_device_sun_show, NULL); | |
318 | ||
e49bd2dd | 319 | static int acpi_device_setup_files(struct acpi_device *dev) |
1da177e4 | 320 | { |
d1efe3c3 | 321 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
f883d9db PM |
322 | acpi_status status; |
323 | acpi_handle temp; | |
bb74ac23 | 324 | unsigned long long sun; |
e49bd2dd | 325 | int result = 0; |
1da177e4 LT |
326 | |
327 | /* | |
e49bd2dd | 328 | * Devices gotten from FADT don't have a "path" attribute |
1da177e4 | 329 | */ |
0c526d96 | 330 | if (dev->handle) { |
e49bd2dd | 331 | result = device_create_file(&dev->dev, &dev_attr_path); |
0c526d96 | 332 | if (result) |
e49bd2dd | 333 | goto end; |
1da177e4 LT |
334 | } |
335 | ||
2b2ae7c7 TR |
336 | if (!list_empty(&dev->pnp.ids)) { |
337 | result = device_create_file(&dev->dev, &dev_attr_hid); | |
338 | if (result) | |
339 | goto end; | |
1da177e4 | 340 | |
2b2ae7c7 TR |
341 | result = device_create_file(&dev->dev, &dev_attr_modalias); |
342 | if (result) | |
343 | goto end; | |
344 | } | |
29b71a1c | 345 | |
d1efe3c3 LO |
346 | /* |
347 | * If device has _STR, 'description' file is created | |
348 | */ | |
349 | status = acpi_get_handle(dev->handle, "_STR", &temp); | |
350 | if (ACPI_SUCCESS(status)) { | |
351 | status = acpi_evaluate_object(dev->handle, "_STR", | |
352 | NULL, &buffer); | |
353 | if (ACPI_FAILURE(status)) | |
354 | buffer.pointer = NULL; | |
355 | dev->pnp.str_obj = buffer.pointer; | |
356 | result = device_create_file(&dev->dev, &dev_attr_description); | |
357 | if (result) | |
358 | goto end; | |
359 | } | |
360 | ||
923d4a45 LZ |
361 | if (dev->flags.bus_address) |
362 | result = device_create_file(&dev->dev, &dev_attr_adr); | |
363 | if (dev->pnp.unique_id) | |
364 | result = device_create_file(&dev->dev, &dev_attr_uid); | |
365 | ||
bb74ac23 YI |
366 | status = acpi_evaluate_integer(dev->handle, "_SUN", NULL, &sun); |
367 | if (ACPI_SUCCESS(status)) { | |
368 | dev->pnp.sun = (unsigned long)sun; | |
369 | result = device_create_file(&dev->dev, &dev_attr_sun); | |
370 | if (result) | |
371 | goto end; | |
372 | } else { | |
373 | dev->pnp.sun = (unsigned long)-1; | |
374 | } | |
375 | ||
e49bd2dd ZR |
376 | /* |
377 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
378 | * hot-removal function from userland. | |
379 | */ | |
f883d9db | 380 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); |
836aedb1 | 381 | if (ACPI_SUCCESS(status)) { |
e49bd2dd | 382 | result = device_create_file(&dev->dev, &dev_attr_eject); |
836aedb1 RW |
383 | if (result) |
384 | return result; | |
385 | } | |
386 | ||
387 | if (dev->flags.power_manageable) { | |
388 | result = device_create_file(&dev->dev, &dev_attr_power_state); | |
389 | if (result) | |
390 | return result; | |
391 | ||
392 | if (dev->power.flags.power_resources) | |
393 | result = device_create_file(&dev->dev, | |
394 | &dev_attr_real_power_state); | |
395 | } | |
396 | ||
0c526d96 | 397 | end: |
e49bd2dd | 398 | return result; |
1da177e4 LT |
399 | } |
400 | ||
f883d9db | 401 | static void acpi_device_remove_files(struct acpi_device *dev) |
1da177e4 | 402 | { |
f883d9db PM |
403 | acpi_status status; |
404 | acpi_handle temp; | |
1da177e4 | 405 | |
836aedb1 RW |
406 | if (dev->flags.power_manageable) { |
407 | device_remove_file(&dev->dev, &dev_attr_power_state); | |
408 | if (dev->power.flags.power_resources) | |
409 | device_remove_file(&dev->dev, | |
410 | &dev_attr_real_power_state); | |
411 | } | |
412 | ||
f883d9db | 413 | /* |
d1efe3c3 LO |
414 | * If device has _STR, remove 'description' file |
415 | */ | |
416 | status = acpi_get_handle(dev->handle, "_STR", &temp); | |
417 | if (ACPI_SUCCESS(status)) { | |
418 | kfree(dev->pnp.str_obj); | |
419 | device_remove_file(&dev->dev, &dev_attr_description); | |
420 | } | |
421 | /* | |
422 | * If device has _EJ0, remove 'eject' file. | |
f883d9db PM |
423 | */ |
424 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); | |
425 | if (ACPI_SUCCESS(status)) | |
426 | device_remove_file(&dev->dev, &dev_attr_eject); | |
1da177e4 | 427 | |
bb74ac23 YI |
428 | status = acpi_get_handle(dev->handle, "_SUN", &temp); |
429 | if (ACPI_SUCCESS(status)) | |
430 | device_remove_file(&dev->dev, &dev_attr_sun); | |
431 | ||
923d4a45 LZ |
432 | if (dev->pnp.unique_id) |
433 | device_remove_file(&dev->dev, &dev_attr_uid); | |
434 | if (dev->flags.bus_address) | |
435 | device_remove_file(&dev->dev, &dev_attr_adr); | |
1131b938 BH |
436 | device_remove_file(&dev->dev, &dev_attr_modalias); |
437 | device_remove_file(&dev->dev, &dev_attr_hid); | |
0c526d96 | 438 | if (dev->handle) |
e49bd2dd | 439 | device_remove_file(&dev->dev, &dev_attr_path); |
1da177e4 | 440 | } |
1da177e4 | 441 | /* -------------------------------------------------------------------------- |
9e89dde2 | 442 | ACPI Bus operations |
1da177e4 | 443 | -------------------------------------------------------------------------- */ |
29b71a1c | 444 | |
cf761af9 MW |
445 | static const struct acpi_device_id *__acpi_match_device( |
446 | struct acpi_device *device, const struct acpi_device_id *ids) | |
29b71a1c TR |
447 | { |
448 | const struct acpi_device_id *id; | |
7f47fa6c | 449 | struct acpi_hardware_id *hwid; |
29b71a1c | 450 | |
39a0ad87 ZY |
451 | /* |
452 | * If the device is not present, it is unnecessary to load device | |
453 | * driver for it. | |
454 | */ | |
455 | if (!device->status.present) | |
cf761af9 | 456 | return NULL; |
39a0ad87 | 457 | |
7f47fa6c BH |
458 | for (id = ids; id->id[0]; id++) |
459 | list_for_each_entry(hwid, &device->pnp.ids, list) | |
460 | if (!strcmp((char *) id->id, hwid->id)) | |
cf761af9 MW |
461 | return id; |
462 | ||
463 | return NULL; | |
464 | } | |
465 | ||
466 | /** | |
467 | * acpi_match_device - Match a struct device against a given list of ACPI IDs | |
468 | * @ids: Array of struct acpi_device_id object to match against. | |
469 | * @dev: The device structure to match. | |
470 | * | |
471 | * Check if @dev has a valid ACPI handle and if there is a struct acpi_device | |
472 | * object for that handle and use that object to match against a given list of | |
473 | * device IDs. | |
474 | * | |
475 | * Return a pointer to the first matching ID on success or %NULL on failure. | |
476 | */ | |
477 | const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids, | |
478 | const struct device *dev) | |
479 | { | |
480 | struct acpi_device *adev; | |
481 | ||
95f8a082 RW |
482 | if (!ids || !ACPI_HANDLE(dev) |
483 | || ACPI_FAILURE(acpi_bus_get_device(ACPI_HANDLE(dev), &adev))) | |
cf761af9 MW |
484 | return NULL; |
485 | ||
486 | return __acpi_match_device(adev, ids); | |
487 | } | |
488 | EXPORT_SYMBOL_GPL(acpi_match_device); | |
29b71a1c | 489 | |
cf761af9 MW |
490 | int acpi_match_device_ids(struct acpi_device *device, |
491 | const struct acpi_device_id *ids) | |
492 | { | |
493 | return __acpi_match_device(device, ids) ? 0 : -ENOENT; | |
29b71a1c TR |
494 | } |
495 | EXPORT_SYMBOL(acpi_match_device_ids); | |
496 | ||
82c7d5ef | 497 | void acpi_free_ids(struct acpi_device *device) |
7f47fa6c BH |
498 | { |
499 | struct acpi_hardware_id *id, *tmp; | |
500 | ||
501 | list_for_each_entry_safe(id, tmp, &device->pnp.ids, list) { | |
502 | kfree(id->id); | |
503 | kfree(id); | |
504 | } | |
d43e167d | 505 | kfree(device->pnp.unique_id); |
7f47fa6c BH |
506 | } |
507 | ||
0b224527 RW |
508 | static void acpi_free_power_resources_lists(struct acpi_device *device) |
509 | { | |
510 | int i; | |
511 | ||
993cbe59 RW |
512 | if (device->wakeup.flags.valid) |
513 | acpi_power_resources_list_free(&device->wakeup.resources); | |
514 | ||
0b224527 RW |
515 | if (!device->flags.power_manageable) |
516 | return; | |
517 | ||
518 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) { | |
519 | struct acpi_device_power_state *ps = &device->power.states[i]; | |
520 | acpi_power_resources_list_free(&ps->resources); | |
521 | } | |
7f47fa6c BH |
522 | } |
523 | ||
1890a97a | 524 | static void acpi_device_release(struct device *dev) |
1da177e4 | 525 | { |
1890a97a | 526 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 527 | |
7f47fa6c | 528 | acpi_free_ids(acpi_dev); |
0b224527 | 529 | acpi_free_power_resources_lists(acpi_dev); |
1890a97a | 530 | kfree(acpi_dev); |
1da177e4 LT |
531 | } |
532 | ||
5d9464a4 | 533 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 534 | { |
5d9464a4 PM |
535 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
536 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
1da177e4 | 537 | |
209d3b17 | 538 | return acpi_dev->flags.match_driver |
805d410f | 539 | && !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
5d9464a4 | 540 | } |
1da177e4 | 541 | |
7eff2e7a | 542 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 | 543 | { |
5d9464a4 | 544 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
7eff2e7a | 545 | int len; |
5d9464a4 | 546 | |
2b2ae7c7 TR |
547 | if (list_empty(&acpi_dev->pnp.ids)) |
548 | return 0; | |
549 | ||
7eff2e7a KS |
550 | if (add_uevent_var(env, "MODALIAS=")) |
551 | return -ENOMEM; | |
552 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], | |
553 | sizeof(env->buf) - env->buflen); | |
554 | if (len >= (sizeof(env->buf) - env->buflen)) | |
555 | return -ENOMEM; | |
556 | env->buflen += len; | |
9e89dde2 | 557 | return 0; |
1da177e4 LT |
558 | } |
559 | ||
46ec8598 BH |
560 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
561 | { | |
562 | struct acpi_device *device = data; | |
563 | ||
564 | device->driver->ops.notify(device, event); | |
565 | } | |
566 | ||
567 | static acpi_status acpi_device_notify_fixed(void *data) | |
568 | { | |
569 | struct acpi_device *device = data; | |
570 | ||
53de5356 BH |
571 | /* Fixed hardware devices have no handles */ |
572 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); | |
46ec8598 BH |
573 | return AE_OK; |
574 | } | |
575 | ||
576 | static int acpi_device_install_notify_handler(struct acpi_device *device) | |
577 | { | |
578 | acpi_status status; | |
46ec8598 | 579 | |
ccba2a36 | 580 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
581 | status = |
582 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
583 | acpi_device_notify_fixed, | |
584 | device); | |
ccba2a36 | 585 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
586 | status = |
587 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
588 | acpi_device_notify_fixed, | |
589 | device); | |
590 | else | |
591 | status = acpi_install_notify_handler(device->handle, | |
592 | ACPI_DEVICE_NOTIFY, | |
593 | acpi_device_notify, | |
594 | device); | |
595 | ||
596 | if (ACPI_FAILURE(status)) | |
597 | return -EINVAL; | |
598 | return 0; | |
599 | } | |
600 | ||
601 | static void acpi_device_remove_notify_handler(struct acpi_device *device) | |
602 | { | |
ccba2a36 | 603 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
604 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, |
605 | acpi_device_notify_fixed); | |
ccba2a36 | 606 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
607 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, |
608 | acpi_device_notify_fixed); | |
609 | else | |
610 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, | |
611 | acpi_device_notify); | |
612 | } | |
613 | ||
5d9464a4 | 614 | static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *); |
5d9464a4 | 615 | static int acpi_device_probe(struct device * dev) |
1da177e4 | 616 | { |
5d9464a4 PM |
617 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
618 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
619 | int ret; | |
620 | ||
621 | ret = acpi_bus_driver_init(acpi_dev, acpi_drv); | |
622 | if (!ret) { | |
46ec8598 BH |
623 | if (acpi_drv->ops.notify) { |
624 | ret = acpi_device_install_notify_handler(acpi_dev); | |
625 | if (ret) { | |
46ec8598 | 626 | if (acpi_drv->ops.remove) |
51fac838 | 627 | acpi_drv->ops.remove(acpi_dev); |
5f27ee8e TK |
628 | acpi_dev->driver = NULL; |
629 | acpi_dev->driver_data = NULL; | |
46ec8598 BH |
630 | return ret; |
631 | } | |
632 | } | |
633 | ||
5d9464a4 PM |
634 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
635 | "Found driver [%s] for device [%s]\n", | |
636 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
637 | get_device(dev); | |
638 | } | |
639 | return ret; | |
640 | } | |
1da177e4 | 641 | |
5d9464a4 PM |
642 | static int acpi_device_remove(struct device * dev) |
643 | { | |
644 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
645 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
646 | ||
647 | if (acpi_drv) { | |
46ec8598 BH |
648 | if (acpi_drv->ops.notify) |
649 | acpi_device_remove_notify_handler(acpi_dev); | |
5d9464a4 | 650 | if (acpi_drv->ops.remove) |
51fac838 | 651 | acpi_drv->ops.remove(acpi_dev); |
1da177e4 | 652 | } |
5d9464a4 | 653 | acpi_dev->driver = NULL; |
db89b4f0 | 654 | acpi_dev->driver_data = NULL; |
1da177e4 | 655 | |
5d9464a4 | 656 | put_device(dev); |
9e89dde2 ZR |
657 | return 0; |
658 | } | |
1da177e4 | 659 | |
55955aad | 660 | struct bus_type acpi_bus_type = { |
9e89dde2 | 661 | .name = "acpi", |
5d9464a4 PM |
662 | .match = acpi_bus_match, |
663 | .probe = acpi_device_probe, | |
664 | .remove = acpi_device_remove, | |
665 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
666 | }; |
667 | ||
cf860be6 RW |
668 | int acpi_device_add(struct acpi_device *device, |
669 | void (*release)(struct device *)) | |
1da177e4 | 670 | { |
4be44fcd | 671 | int result; |
e49bd2dd ZR |
672 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
673 | int found = 0; | |
66b7ed40 | 674 | |
d43e167d RW |
675 | if (device->handle) { |
676 | acpi_status status; | |
677 | ||
678 | status = acpi_attach_data(device->handle, acpi_bus_data_handler, | |
679 | device); | |
680 | if (ACPI_FAILURE(status)) { | |
681 | acpi_handle_err(device->handle, | |
682 | "Unable to attach device data\n"); | |
683 | return -ENODEV; | |
684 | } | |
685 | } | |
686 | ||
9e89dde2 ZR |
687 | /* |
688 | * Linkage | |
689 | * ------- | |
690 | * Link this device to its parent and siblings. | |
691 | */ | |
692 | INIT_LIST_HEAD(&device->children); | |
693 | INIT_LIST_HEAD(&device->node); | |
9e89dde2 | 694 | INIT_LIST_HEAD(&device->wakeup_list); |
1033f904 LT |
695 | INIT_LIST_HEAD(&device->physical_node_list); |
696 | mutex_init(&device->physical_node_lock); | |
bc9b6407 | 697 | INIT_LIST_HEAD(&device->power_dependent); |
1da177e4 | 698 | |
e49bd2dd ZR |
699 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
700 | if (!new_bus_id) { | |
d43e167d RW |
701 | pr_err(PREFIX "Memory allocation error\n"); |
702 | result = -ENOMEM; | |
703 | goto err_detach; | |
1da177e4 | 704 | } |
e49bd2dd | 705 | |
9090589d | 706 | mutex_lock(&acpi_device_lock); |
e49bd2dd ZR |
707 | /* |
708 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
709 | * If failed, create one and link it into acpi_bus_id_list | |
710 | */ | |
711 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
1131b938 BH |
712 | if (!strcmp(acpi_device_bus_id->bus_id, |
713 | acpi_device_hid(device))) { | |
714 | acpi_device_bus_id->instance_no++; | |
e49bd2dd ZR |
715 | found = 1; |
716 | kfree(new_bus_id); | |
717 | break; | |
718 | } | |
1da177e4 | 719 | } |
0c526d96 | 720 | if (!found) { |
e49bd2dd | 721 | acpi_device_bus_id = new_bus_id; |
1131b938 | 722 | strcpy(acpi_device_bus_id->bus_id, acpi_device_hid(device)); |
e49bd2dd ZR |
723 | acpi_device_bus_id->instance_no = 0; |
724 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 725 | } |
0794469d | 726 | dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 727 | |
33b57150 | 728 | if (device->parent) |
9e89dde2 | 729 | list_add_tail(&device->node, &device->parent->children); |
33b57150 | 730 | |
9e89dde2 ZR |
731 | if (device->wakeup.flags.valid) |
732 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
9090589d | 733 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 734 | |
1890a97a | 735 | if (device->parent) |
66b7ed40 | 736 | device->dev.parent = &device->parent->dev; |
1890a97a | 737 | device->dev.bus = &acpi_bus_type; |
82c7d5ef | 738 | device->dev.release = release; |
cf860be6 | 739 | result = device_add(&device->dev); |
0c526d96 | 740 | if (result) { |
8b12b922 | 741 | dev_err(&device->dev, "Error registering device\n"); |
d43e167d | 742 | goto err; |
1da177e4 | 743 | } |
1da177e4 | 744 | |
e49bd2dd | 745 | result = acpi_device_setup_files(device); |
0c526d96 | 746 | if (result) |
0794469d KS |
747 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
748 | dev_name(&device->dev)); | |
1da177e4 | 749 | |
96333578 | 750 | device->removal_type = ACPI_BUS_REMOVAL_NORMAL; |
1da177e4 | 751 | return 0; |
d43e167d RW |
752 | |
753 | err: | |
9090589d | 754 | mutex_lock(&acpi_device_lock); |
33b57150 | 755 | if (device->parent) |
e49bd2dd | 756 | list_del(&device->node); |
e49bd2dd | 757 | list_del(&device->wakeup_list); |
9090589d | 758 | mutex_unlock(&acpi_device_lock); |
d43e167d RW |
759 | |
760 | err_detach: | |
761 | acpi_detach_data(device->handle, acpi_bus_data_handler); | |
e49bd2dd | 762 | return result; |
1da177e4 LT |
763 | } |
764 | ||
b17b537a | 765 | static void acpi_device_unregister(struct acpi_device *device) |
9e89dde2 | 766 | { |
9090589d | 767 | mutex_lock(&acpi_device_lock); |
33b57150 | 768 | if (device->parent) |
9e89dde2 | 769 | list_del(&device->node); |
1da177e4 | 770 | |
9e89dde2 | 771 | list_del(&device->wakeup_list); |
9090589d | 772 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 773 | |
9e89dde2 | 774 | acpi_detach_data(device->handle, acpi_bus_data_handler); |
1890a97a | 775 | |
bc9b6407 | 776 | acpi_power_add_remove_device(device, false); |
f883d9db | 777 | acpi_device_remove_files(device); |
b1c0f99b RW |
778 | if (device->remove) |
779 | device->remove(device); | |
780 | ||
cf860be6 | 781 | device_del(&device->dev); |
bc9b6407 RW |
782 | /* |
783 | * Drop the reference counts of all power resources the device depends | |
784 | * on and turn off the ones that have no more references. | |
785 | */ | |
786 | acpi_power_transition(device, ACPI_STATE_D3_COLD); | |
cf860be6 | 787 | put_device(&device->dev); |
1da177e4 LT |
788 | } |
789 | ||
9e89dde2 ZR |
790 | /* -------------------------------------------------------------------------- |
791 | Driver Management | |
792 | -------------------------------------------------------------------------- */ | |
1da177e4 | 793 | /** |
d758a8fa RD |
794 | * acpi_bus_driver_init - add a device to a driver |
795 | * @device: the device to add and initialize | |
796 | * @driver: driver for the device | |
797 | * | |
0c526d96 | 798 | * Used to initialize a device via its device driver. Called whenever a |
1890a97a | 799 | * driver is bound to a device. Invokes the driver's add() ops. |
1da177e4 LT |
800 | */ |
801 | static int | |
4be44fcd | 802 | acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) |
1da177e4 | 803 | { |
4be44fcd | 804 | int result = 0; |
1da177e4 | 805 | |
1da177e4 | 806 | if (!device || !driver) |
d550d98d | 807 | return -EINVAL; |
1da177e4 LT |
808 | |
809 | if (!driver->ops.add) | |
d550d98d | 810 | return -ENOSYS; |
1da177e4 LT |
811 | |
812 | result = driver->ops.add(device); | |
813 | if (result) { | |
814 | device->driver = NULL; | |
db89b4f0 | 815 | device->driver_data = NULL; |
d550d98d | 816 | return result; |
1da177e4 LT |
817 | } |
818 | ||
819 | device->driver = driver; | |
820 | ||
821 | /* | |
822 | * TBD - Configuration Management: Assign resources to device based | |
823 | * upon possible configuration and currently allocated resources. | |
824 | */ | |
825 | ||
4be44fcd LB |
826 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
827 | "Driver successfully bound to device\n")); | |
d550d98d | 828 | return 0; |
3fb02738 RS |
829 | } |
830 | ||
9e89dde2 ZR |
831 | /** |
832 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
833 | * @driver: driver being registered | |
834 | * | |
835 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
836 | * devices that match the driver's criteria and binds. Returns zero for | |
837 | * success or a negative error status for failure. | |
838 | */ | |
839 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
1da177e4 | 840 | { |
1890a97a | 841 | int ret; |
1da177e4 | 842 | |
9e89dde2 ZR |
843 | if (acpi_disabled) |
844 | return -ENODEV; | |
1890a97a PM |
845 | driver->drv.name = driver->name; |
846 | driver->drv.bus = &acpi_bus_type; | |
847 | driver->drv.owner = driver->owner; | |
1da177e4 | 848 | |
1890a97a PM |
849 | ret = driver_register(&driver->drv); |
850 | return ret; | |
9e89dde2 | 851 | } |
1da177e4 | 852 | |
9e89dde2 ZR |
853 | EXPORT_SYMBOL(acpi_bus_register_driver); |
854 | ||
855 | /** | |
856 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus | |
857 | * @driver: driver to unregister | |
858 | * | |
859 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
860 | * devices that match the driver's criteria and unbinds. | |
861 | */ | |
862 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
863 | { | |
1890a97a | 864 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
865 | } |
866 | ||
867 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
868 | ||
9e89dde2 ZR |
869 | /* -------------------------------------------------------------------------- |
870 | Device Enumeration | |
871 | -------------------------------------------------------------------------- */ | |
5c478f49 BH |
872 | static struct acpi_device *acpi_bus_get_parent(acpi_handle handle) |
873 | { | |
456de893 | 874 | struct acpi_device *device = NULL; |
5c478f49 | 875 | acpi_status status; |
5c478f49 BH |
876 | |
877 | /* | |
878 | * Fixed hardware devices do not appear in the namespace and do not | |
879 | * have handles, but we fabricate acpi_devices for them, so we have | |
880 | * to deal with them specially. | |
881 | */ | |
456de893 | 882 | if (!handle) |
5c478f49 BH |
883 | return acpi_root; |
884 | ||
885 | do { | |
886 | status = acpi_get_parent(handle, &handle); | |
5c478f49 | 887 | if (ACPI_FAILURE(status)) |
456de893 RW |
888 | return status == AE_NULL_ENTRY ? NULL : acpi_root; |
889 | } while (acpi_bus_get_device(handle, &device)); | |
890 | return device; | |
5c478f49 BH |
891 | } |
892 | ||
9e89dde2 ZR |
893 | acpi_status |
894 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
895 | { | |
896 | acpi_status status; | |
897 | acpi_handle tmp; | |
898 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
899 | union acpi_object *obj; | |
900 | ||
901 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
902 | if (ACPI_FAILURE(status)) | |
903 | return status; | |
904 | ||
905 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
906 | if (ACPI_SUCCESS(status)) { | |
907 | obj = buffer.pointer; | |
3b5fee59 HM |
908 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
909 | ejd); | |
9e89dde2 ZR |
910 | kfree(buffer.pointer); |
911 | } | |
912 | return status; | |
913 | } | |
914 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
915 | ||
8e4319c4 | 916 | void acpi_bus_data_handler(acpi_handle handle, void *context) |
9e89dde2 ZR |
917 | { |
918 | ||
919 | /* TBD */ | |
920 | ||
921 | return; | |
922 | } | |
923 | ||
e88c9c60 RW |
924 | static int acpi_bus_extract_wakeup_device_power_package(acpi_handle handle, |
925 | struct acpi_device_wakeup *wakeup) | |
9e89dde2 | 926 | { |
b581a7f9 RW |
927 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
928 | union acpi_object *package = NULL; | |
9e89dde2 | 929 | union acpi_object *element = NULL; |
b581a7f9 | 930 | acpi_status status; |
e88c9c60 | 931 | int err = -ENODATA; |
9e89dde2 | 932 | |
b581a7f9 | 933 | if (!wakeup) |
e88c9c60 | 934 | return -EINVAL; |
9e89dde2 | 935 | |
993cbe59 | 936 | INIT_LIST_HEAD(&wakeup->resources); |
9e89dde2 | 937 | |
b581a7f9 RW |
938 | /* _PRW */ |
939 | status = acpi_evaluate_object(handle, "_PRW", NULL, &buffer); | |
940 | if (ACPI_FAILURE(status)) { | |
941 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
e88c9c60 | 942 | return err; |
b581a7f9 RW |
943 | } |
944 | ||
945 | package = (union acpi_object *)buffer.pointer; | |
946 | ||
e88c9c60 | 947 | if (!package || package->package.count < 2) |
b581a7f9 | 948 | goto out; |
b581a7f9 | 949 | |
9e89dde2 | 950 | element = &(package->package.elements[0]); |
e88c9c60 | 951 | if (!element) |
b581a7f9 | 952 | goto out; |
e88c9c60 | 953 | |
9e89dde2 ZR |
954 | if (element->type == ACPI_TYPE_PACKAGE) { |
955 | if ((element->package.count < 2) || | |
956 | (element->package.elements[0].type != | |
957 | ACPI_TYPE_LOCAL_REFERENCE) | |
e88c9c60 | 958 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) |
b581a7f9 | 959 | goto out; |
e88c9c60 | 960 | |
b581a7f9 | 961 | wakeup->gpe_device = |
9e89dde2 | 962 | element->package.elements[0].reference.handle; |
b581a7f9 | 963 | wakeup->gpe_number = |
9e89dde2 ZR |
964 | (u32) element->package.elements[1].integer.value; |
965 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
b581a7f9 RW |
966 | wakeup->gpe_device = NULL; |
967 | wakeup->gpe_number = element->integer.value; | |
968 | } else { | |
b581a7f9 RW |
969 | goto out; |
970 | } | |
9e89dde2 ZR |
971 | |
972 | element = &(package->package.elements[1]); | |
e88c9c60 | 973 | if (element->type != ACPI_TYPE_INTEGER) |
b581a7f9 | 974 | goto out; |
e88c9c60 | 975 | |
b581a7f9 | 976 | wakeup->sleep_state = element->integer.value; |
9e89dde2 | 977 | |
e88c9c60 RW |
978 | err = acpi_extract_power_resources(package, 2, &wakeup->resources); |
979 | if (err) | |
b581a7f9 | 980 | goto out; |
9e89dde2 | 981 | |
0596a52b RW |
982 | if (!list_empty(&wakeup->resources)) { |
983 | int sleep_state; | |
9e89dde2 | 984 | |
0596a52b RW |
985 | sleep_state = acpi_power_min_system_level(&wakeup->resources); |
986 | if (sleep_state < wakeup->sleep_state) { | |
987 | acpi_handle_warn(handle, "Overriding _PRW sleep state " | |
988 | "(S%d) by S%d from power resources\n", | |
989 | (int)wakeup->sleep_state, sleep_state); | |
990 | wakeup->sleep_state = sleep_state; | |
991 | } | |
992 | } | |
bba63a29 | 993 | acpi_setup_gpe_for_wake(handle, wakeup->gpe_device, wakeup->gpe_number); |
9874647b | 994 | |
b581a7f9 RW |
995 | out: |
996 | kfree(buffer.pointer); | |
e88c9c60 | 997 | return err; |
1da177e4 LT |
998 | } |
999 | ||
f517709d | 1000 | static void acpi_bus_set_run_wake_flags(struct acpi_device *device) |
1da177e4 | 1001 | { |
29b71a1c | 1002 | struct acpi_device_id button_device_ids[] = { |
29b71a1c | 1003 | {"PNP0C0C", 0}, |
b7e38304 | 1004 | {"PNP0C0D", 0}, |
29b71a1c TR |
1005 | {"PNP0C0E", 0}, |
1006 | {"", 0}, | |
1007 | }; | |
f517709d RW |
1008 | acpi_status status; |
1009 | acpi_event_status event_status; | |
1010 | ||
b67ea761 | 1011 | device->wakeup.flags.notifier_present = 0; |
f517709d RW |
1012 | |
1013 | /* Power button, Lid switch always enable wakeup */ | |
1014 | if (!acpi_match_device_ids(device, button_device_ids)) { | |
1015 | device->wakeup.flags.run_wake = 1; | |
b7e38304 ZR |
1016 | if (!acpi_match_device_ids(device, &button_device_ids[1])) { |
1017 | /* Do not use Lid/sleep button for S5 wakeup */ | |
1018 | if (device->wakeup.sleep_state == ACPI_STATE_S5) | |
1019 | device->wakeup.sleep_state = ACPI_STATE_S4; | |
1020 | } | |
f2b56bc8 | 1021 | device_set_wakeup_capable(&device->dev, true); |
f517709d RW |
1022 | return; |
1023 | } | |
1024 | ||
e8e18c95 RW |
1025 | status = acpi_get_gpe_status(device->wakeup.gpe_device, |
1026 | device->wakeup.gpe_number, | |
1027 | &event_status); | |
f517709d RW |
1028 | if (status == AE_OK) |
1029 | device->wakeup.flags.run_wake = | |
1030 | !!(event_status & ACPI_EVENT_FLAG_HANDLE); | |
1031 | } | |
1032 | ||
d57d09a4 | 1033 | static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
f517709d | 1034 | { |
d57d09a4 | 1035 | acpi_handle temp; |
f517709d | 1036 | acpi_status status = 0; |
e88c9c60 | 1037 | int err; |
29b71a1c | 1038 | |
d57d09a4 RW |
1039 | /* Presence of _PRW indicates wake capable */ |
1040 | status = acpi_get_handle(device->handle, "_PRW", &temp); | |
1041 | if (ACPI_FAILURE(status)) | |
1042 | return; | |
1043 | ||
e88c9c60 RW |
1044 | err = acpi_bus_extract_wakeup_device_power_package(device->handle, |
1045 | &device->wakeup); | |
1046 | if (err) { | |
1047 | dev_err(&device->dev, "_PRW evaluation error: %d\n", err); | |
d57d09a4 | 1048 | return; |
9e89dde2 | 1049 | } |
1da177e4 | 1050 | |
9e89dde2 | 1051 | device->wakeup.flags.valid = 1; |
9b83ccd2 | 1052 | device->wakeup.prepare_count = 0; |
f517709d | 1053 | acpi_bus_set_run_wake_flags(device); |
729b2bdb ZY |
1054 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
1055 | * system for the ACPI device with the _PRW object. | |
1056 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. | |
1057 | * So it is necessary to call _DSW object first. Only when it is not | |
1058 | * present will the _PSW object used. | |
1059 | */ | |
e88c9c60 RW |
1060 | err = acpi_device_sleep_wake(device, 0, 0, 0); |
1061 | if (err) | |
77e76609 RW |
1062 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
1063 | "error in _DSW or _PSW evaluation\n")); | |
1da177e4 | 1064 | } |
1da177e4 | 1065 | |
f33ce568 RW |
1066 | static void acpi_bus_init_power_state(struct acpi_device *device, int state) |
1067 | { | |
1068 | struct acpi_device_power_state *ps = &device->power.states[state]; | |
ef85bdbe RW |
1069 | char pathname[5] = { '_', 'P', 'R', '0' + state, '\0' }; |
1070 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
f33ce568 RW |
1071 | acpi_handle handle; |
1072 | acpi_status status; | |
bf325f95 | 1073 | |
f33ce568 RW |
1074 | INIT_LIST_HEAD(&ps->resources); |
1075 | ||
ef85bdbe RW |
1076 | /* Evaluate "_PRx" to get referenced power resources */ |
1077 | status = acpi_evaluate_object(device->handle, pathname, NULL, &buffer); | |
1078 | if (ACPI_SUCCESS(status)) { | |
1079 | union acpi_object *package = buffer.pointer; | |
1080 | ||
1081 | if (buffer.length && package | |
1082 | && package->type == ACPI_TYPE_PACKAGE | |
1083 | && package->package.count) { | |
e88c9c60 RW |
1084 | int err = acpi_extract_power_resources(package, 0, |
1085 | &ps->resources); | |
1086 | if (!err) | |
ef85bdbe | 1087 | device->power.flags.power_resources = 1; |
f33ce568 | 1088 | } |
ef85bdbe | 1089 | ACPI_FREE(buffer.pointer); |
f33ce568 RW |
1090 | } |
1091 | ||
1092 | /* Evaluate "_PSx" to see if we can do explicit sets */ | |
ef85bdbe RW |
1093 | pathname[2] = 'S'; |
1094 | status = acpi_get_handle(device->handle, pathname, &handle); | |
f33ce568 RW |
1095 | if (ACPI_SUCCESS(status)) |
1096 | ps->flags.explicit_set = 1; | |
1097 | ||
1098 | /* | |
1099 | * State is valid if there are means to put the device into it. | |
1100 | * D3hot is only valid if _PR3 present. | |
1101 | */ | |
ef85bdbe | 1102 | if (!list_empty(&ps->resources) |
f33ce568 RW |
1103 | || (ps->flags.explicit_set && state < ACPI_STATE_D3_HOT)) { |
1104 | ps->flags.valid = 1; | |
1105 | ps->flags.os_accessible = 1; | |
1106 | } | |
1107 | ||
1108 | ps->power = -1; /* Unknown - driver assigned */ | |
1109 | ps->latency = -1; /* Unknown - driver assigned */ | |
1110 | } | |
1111 | ||
d43e167d | 1112 | static void acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 1113 | { |
8bc5053b RW |
1114 | acpi_status status; |
1115 | acpi_handle handle; | |
1116 | u32 i; | |
1a365616 | 1117 | |
d43e167d RW |
1118 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ |
1119 | status = acpi_get_handle(device->handle, "_PS0", &handle); | |
1120 | if (ACPI_FAILURE(status)) { | |
1121 | status = acpi_get_handle(device->handle, "_PR0", &handle); | |
1122 | if (ACPI_FAILURE(status)) | |
1123 | return; | |
1124 | } | |
1125 | ||
1126 | device->flags.power_manageable = 1; | |
4be44fcd | 1127 | |
9e89dde2 ZR |
1128 | /* |
1129 | * Power Management Flags | |
1130 | */ | |
1131 | status = acpi_get_handle(device->handle, "_PSC", &handle); | |
1132 | if (ACPI_SUCCESS(status)) | |
1133 | device->power.flags.explicit_get = 1; | |
1134 | status = acpi_get_handle(device->handle, "_IRC", &handle); | |
1135 | if (ACPI_SUCCESS(status)) | |
1136 | device->power.flags.inrush_current = 1; | |
1da177e4 | 1137 | |
9e89dde2 ZR |
1138 | /* |
1139 | * Enumerate supported power management states | |
1140 | */ | |
f33ce568 RW |
1141 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) |
1142 | acpi_bus_init_power_state(device, i); | |
bf325f95 | 1143 | |
0b224527 | 1144 | INIT_LIST_HEAD(&device->power.states[ACPI_STATE_D3_COLD].resources); |
1da177e4 | 1145 | |
9e89dde2 ZR |
1146 | /* Set defaults for D0 and D3 states (always valid) */ |
1147 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
1148 | device->power.states[ACPI_STATE_D0].power = 100; | |
1149 | device->power.states[ACPI_STATE_D3].flags.valid = 1; | |
1150 | device->power.states[ACPI_STATE_D3].power = 0; | |
c8f7a62c | 1151 | |
5c7dd710 RW |
1152 | /* Set D3cold's explicit_set flag if _PS3 exists. */ |
1153 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set) | |
1154 | device->power.states[ACPI_STATE_D3_COLD].flags.explicit_set = 1; | |
1155 | ||
1399dfcd AL |
1156 | /* Presence of _PS3 or _PRx means we can put the device into D3 cold */ |
1157 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set || | |
1158 | device->power.flags.power_resources) | |
1159 | device->power.states[ACPI_STATE_D3_COLD].flags.os_accessible = 1; | |
1160 | ||
ade3e7fe | 1161 | acpi_bus_init_power(device); |
9e89dde2 | 1162 | } |
c8f7a62c | 1163 | |
d43e167d | 1164 | static void acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 1165 | { |
4be44fcd LB |
1166 | acpi_status status = AE_OK; |
1167 | acpi_handle temp = NULL; | |
1da177e4 | 1168 | |
1da177e4 LT |
1169 | /* Presence of _STA indicates 'dynamic_status' */ |
1170 | status = acpi_get_handle(device->handle, "_STA", &temp); | |
1171 | if (ACPI_SUCCESS(status)) | |
1172 | device->flags.dynamic_status = 1; | |
1173 | ||
1da177e4 LT |
1174 | /* Presence of _RMV indicates 'removable' */ |
1175 | status = acpi_get_handle(device->handle, "_RMV", &temp); | |
1176 | if (ACPI_SUCCESS(status)) | |
1177 | device->flags.removable = 1; | |
1178 | ||
1179 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
1180 | status = acpi_get_handle(device->handle, "_EJD", &temp); | |
1181 | if (ACPI_SUCCESS(status)) | |
1182 | device->flags.ejectable = 1; | |
1183 | else { | |
1184 | status = acpi_get_handle(device->handle, "_EJ0", &temp); | |
1185 | if (ACPI_SUCCESS(status)) | |
1186 | device->flags.ejectable = 1; | |
1187 | } | |
1da177e4 LT |
1188 | } |
1189 | ||
c7bcb4e9 | 1190 | static void acpi_device_get_busid(struct acpi_device *device) |
1da177e4 | 1191 | { |
4be44fcd LB |
1192 | char bus_id[5] = { '?', 0 }; |
1193 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
1194 | int i = 0; | |
1da177e4 LT |
1195 | |
1196 | /* | |
1197 | * Bus ID | |
1198 | * ------ | |
1199 | * The device's Bus ID is simply the object name. | |
1200 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
1201 | */ | |
859ac9a4 | 1202 | if (ACPI_IS_ROOT_DEVICE(device)) { |
1da177e4 | 1203 | strcpy(device->pnp.bus_id, "ACPI"); |
859ac9a4 BH |
1204 | return; |
1205 | } | |
1206 | ||
1207 | switch (device->device_type) { | |
1da177e4 LT |
1208 | case ACPI_BUS_TYPE_POWER_BUTTON: |
1209 | strcpy(device->pnp.bus_id, "PWRF"); | |
1210 | break; | |
1211 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
1212 | strcpy(device->pnp.bus_id, "SLPF"); | |
1213 | break; | |
1214 | default: | |
66b7ed40 | 1215 | acpi_get_name(device->handle, ACPI_SINGLE_NAME, &buffer); |
1da177e4 LT |
1216 | /* Clean up trailing underscores (if any) */ |
1217 | for (i = 3; i > 1; i--) { | |
1218 | if (bus_id[i] == '_') | |
1219 | bus_id[i] = '\0'; | |
1220 | else | |
1221 | break; | |
1222 | } | |
1223 | strcpy(device->pnp.bus_id, bus_id); | |
1224 | break; | |
1225 | } | |
1226 | } | |
1227 | ||
54735266 ZR |
1228 | /* |
1229 | * acpi_bay_match - see if a device is an ejectable driver bay | |
1230 | * | |
1231 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
1232 | * then we can safely call it an ejectable drive bay | |
1233 | */ | |
1234 | static int acpi_bay_match(struct acpi_device *device){ | |
1235 | acpi_status status; | |
1236 | acpi_handle handle; | |
1237 | acpi_handle tmp; | |
1238 | acpi_handle phandle; | |
1239 | ||
1240 | handle = device->handle; | |
1241 | ||
1242 | status = acpi_get_handle(handle, "_EJ0", &tmp); | |
1243 | if (ACPI_FAILURE(status)) | |
1244 | return -ENODEV; | |
1245 | ||
1246 | if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || | |
1247 | (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || | |
1248 | (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || | |
1249 | (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) | |
1250 | return 0; | |
1251 | ||
1252 | if (acpi_get_parent(handle, &phandle)) | |
1253 | return -ENODEV; | |
1254 | ||
1255 | if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) || | |
1256 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) || | |
1257 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) || | |
1258 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp)))) | |
1259 | return 0; | |
1260 | ||
1261 | return -ENODEV; | |
1262 | } | |
1263 | ||
3620f2f2 FS |
1264 | /* |
1265 | * acpi_dock_match - see if a device has a _DCK method | |
1266 | */ | |
1267 | static int acpi_dock_match(struct acpi_device *device) | |
1268 | { | |
1269 | acpi_handle tmp; | |
1270 | return acpi_get_handle(device->handle, "_DCK", &tmp); | |
1271 | } | |
1272 | ||
620e112c | 1273 | const char *acpi_device_hid(struct acpi_device *device) |
15b8dd53 | 1274 | { |
7f47fa6c | 1275 | struct acpi_hardware_id *hid; |
15b8dd53 | 1276 | |
2b2ae7c7 TR |
1277 | if (list_empty(&device->pnp.ids)) |
1278 | return dummy_hid; | |
1279 | ||
7f47fa6c BH |
1280 | hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list); |
1281 | return hid->id; | |
1282 | } | |
1283 | EXPORT_SYMBOL(acpi_device_hid); | |
15b8dd53 | 1284 | |
7f47fa6c BH |
1285 | static void acpi_add_id(struct acpi_device *device, const char *dev_id) |
1286 | { | |
1287 | struct acpi_hardware_id *id; | |
15b8dd53 | 1288 | |
7f47fa6c BH |
1289 | id = kmalloc(sizeof(*id), GFP_KERNEL); |
1290 | if (!id) | |
1291 | return; | |
15b8dd53 | 1292 | |
581de59e | 1293 | id->id = kstrdup(dev_id, GFP_KERNEL); |
7f47fa6c BH |
1294 | if (!id->id) { |
1295 | kfree(id); | |
1296 | return; | |
15b8dd53 BM |
1297 | } |
1298 | ||
7f47fa6c | 1299 | list_add_tail(&id->list, &device->pnp.ids); |
15b8dd53 BM |
1300 | } |
1301 | ||
222e82ac DW |
1302 | /* |
1303 | * Old IBM workstations have a DSDT bug wherein the SMBus object | |
1304 | * lacks the SMBUS01 HID and the methods do not have the necessary "_" | |
1305 | * prefix. Work around this. | |
1306 | */ | |
1307 | static int acpi_ibm_smbus_match(struct acpi_device *device) | |
1308 | { | |
1309 | acpi_handle h_dummy; | |
1310 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
1311 | int result; | |
1312 | ||
1313 | if (!dmi_name_in_vendors("IBM")) | |
1314 | return -ENODEV; | |
1315 | ||
1316 | /* Look for SMBS object */ | |
1317 | result = acpi_get_name(device->handle, ACPI_SINGLE_NAME, &path); | |
1318 | if (result) | |
1319 | return result; | |
1320 | ||
1321 | if (strcmp("SMBS", path.pointer)) { | |
1322 | result = -ENODEV; | |
1323 | goto out; | |
1324 | } | |
1325 | ||
1326 | /* Does it have the necessary (but misnamed) methods? */ | |
1327 | result = -ENODEV; | |
1328 | if (ACPI_SUCCESS(acpi_get_handle(device->handle, "SBI", &h_dummy)) && | |
1329 | ACPI_SUCCESS(acpi_get_handle(device->handle, "SBR", &h_dummy)) && | |
1330 | ACPI_SUCCESS(acpi_get_handle(device->handle, "SBW", &h_dummy))) | |
1331 | result = 0; | |
1332 | out: | |
1333 | kfree(path.pointer); | |
1334 | return result; | |
1335 | } | |
1336 | ||
c7bcb4e9 | 1337 | static void acpi_device_set_id(struct acpi_device *device) |
1da177e4 | 1338 | { |
4be44fcd | 1339 | acpi_status status; |
57f3674f | 1340 | struct acpi_device_info *info; |
78e25fef | 1341 | struct acpi_pnp_device_id_list *cid_list; |
7f47fa6c | 1342 | int i; |
1da177e4 | 1343 | |
c7bcb4e9 | 1344 | switch (device->device_type) { |
1da177e4 | 1345 | case ACPI_BUS_TYPE_DEVICE: |
859ac9a4 | 1346 | if (ACPI_IS_ROOT_DEVICE(device)) { |
57f3674f | 1347 | acpi_add_id(device, ACPI_SYSTEM_HID); |
859ac9a4 BH |
1348 | break; |
1349 | } | |
1350 | ||
66b7ed40 | 1351 | status = acpi_get_object_info(device->handle, &info); |
1da177e4 | 1352 | if (ACPI_FAILURE(status)) { |
96b2dd1f | 1353 | printk(KERN_ERR PREFIX "%s: Error reading device info\n", __func__); |
1da177e4 LT |
1354 | return; |
1355 | } | |
1356 | ||
1da177e4 | 1357 | if (info->valid & ACPI_VALID_HID) |
57f3674f BH |
1358 | acpi_add_id(device, info->hardware_id.string); |
1359 | if (info->valid & ACPI_VALID_CID) { | |
15b8dd53 | 1360 | cid_list = &info->compatible_id_list; |
57f3674f BH |
1361 | for (i = 0; i < cid_list->count; i++) |
1362 | acpi_add_id(device, cid_list->ids[i].string); | |
1363 | } | |
1da177e4 LT |
1364 | if (info->valid & ACPI_VALID_ADR) { |
1365 | device->pnp.bus_address = info->address; | |
1366 | device->flags.bus_address = 1; | |
1367 | } | |
ccf78040 LZ |
1368 | if (info->valid & ACPI_VALID_UID) |
1369 | device->pnp.unique_id = kstrdup(info->unique_id.string, | |
1370 | GFP_KERNEL); | |
ae843332 | 1371 | |
a83893ae BH |
1372 | kfree(info); |
1373 | ||
57f3674f BH |
1374 | /* |
1375 | * Some devices don't reliably have _HIDs & _CIDs, so add | |
1376 | * synthetic HIDs to make sure drivers can find them. | |
1377 | */ | |
c3d6de69 | 1378 | if (acpi_is_video_device(device)) |
57f3674f | 1379 | acpi_add_id(device, ACPI_VIDEO_HID); |
3620f2f2 | 1380 | else if (ACPI_SUCCESS(acpi_bay_match(device))) |
57f3674f | 1381 | acpi_add_id(device, ACPI_BAY_HID); |
3620f2f2 | 1382 | else if (ACPI_SUCCESS(acpi_dock_match(device))) |
57f3674f | 1383 | acpi_add_id(device, ACPI_DOCK_HID); |
222e82ac DW |
1384 | else if (!acpi_ibm_smbus_match(device)) |
1385 | acpi_add_id(device, ACPI_SMBUS_IBM_HID); | |
4f5f64cf | 1386 | else if (list_empty(&device->pnp.ids) && |
b7b30de5 BH |
1387 | ACPI_IS_ROOT_DEVICE(device->parent)) { |
1388 | acpi_add_id(device, ACPI_BUS_HID); /* \_SB, LNXSYBUS */ | |
1389 | strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME); | |
1390 | strcpy(device->pnp.device_class, ACPI_BUS_CLASS); | |
1391 | } | |
54735266 | 1392 | |
1da177e4 LT |
1393 | break; |
1394 | case ACPI_BUS_TYPE_POWER: | |
57f3674f | 1395 | acpi_add_id(device, ACPI_POWER_HID); |
1da177e4 LT |
1396 | break; |
1397 | case ACPI_BUS_TYPE_PROCESSOR: | |
57f3674f | 1398 | acpi_add_id(device, ACPI_PROCESSOR_OBJECT_HID); |
1da177e4 | 1399 | break; |
1da177e4 | 1400 | case ACPI_BUS_TYPE_THERMAL: |
57f3674f | 1401 | acpi_add_id(device, ACPI_THERMAL_HID); |
1da177e4 LT |
1402 | break; |
1403 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
57f3674f | 1404 | acpi_add_id(device, ACPI_BUTTON_HID_POWERF); |
1da177e4 LT |
1405 | break; |
1406 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
57f3674f | 1407 | acpi_add_id(device, ACPI_BUTTON_HID_SLEEPF); |
1da177e4 LT |
1408 | break; |
1409 | } | |
1da177e4 LT |
1410 | } |
1411 | ||
82c7d5ef RW |
1412 | void acpi_init_device_object(struct acpi_device *device, acpi_handle handle, |
1413 | int type, unsigned long long sta) | |
1da177e4 | 1414 | { |
d43e167d RW |
1415 | INIT_LIST_HEAD(&device->pnp.ids); |
1416 | device->device_type = type; | |
1417 | device->handle = handle; | |
1418 | device->parent = acpi_bus_get_parent(handle); | |
1419 | STRUCT_TO_INT(device->status) = sta; | |
1420 | acpi_device_get_busid(device); | |
1421 | acpi_device_set_id(device); | |
1422 | acpi_bus_get_flags(device); | |
2c0d4fe0 | 1423 | device->flags.match_driver = false; |
cf860be6 RW |
1424 | device_initialize(&device->dev); |
1425 | dev_set_uevent_suppress(&device->dev, true); | |
1426 | } | |
bc3b0772 | 1427 | |
cf860be6 RW |
1428 | void acpi_device_add_finalize(struct acpi_device *device) |
1429 | { | |
2c0d4fe0 | 1430 | device->flags.match_driver = true; |
cf860be6 RW |
1431 | dev_set_uevent_suppress(&device->dev, false); |
1432 | kobject_uevent(&device->dev.kobj, KOBJ_ADD); | |
1da177e4 LT |
1433 | } |
1434 | ||
5c478f49 BH |
1435 | static int acpi_add_single_object(struct acpi_device **child, |
1436 | acpi_handle handle, int type, | |
2c0d4fe0 | 1437 | unsigned long long sta) |
1da177e4 | 1438 | { |
77c24888 BH |
1439 | int result; |
1440 | struct acpi_device *device; | |
29aaefa6 | 1441 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 1442 | |
36bcbec7 | 1443 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 1444 | if (!device) { |
6468463a | 1445 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 1446 | return -ENOMEM; |
1da177e4 | 1447 | } |
1da177e4 | 1448 | |
d43e167d RW |
1449 | acpi_init_device_object(device, handle, type, sta); |
1450 | acpi_bus_get_power_flags(device); | |
d57d09a4 | 1451 | acpi_bus_get_wakeup_device_flags(device); |
1da177e4 | 1452 | |
cf860be6 | 1453 | result = acpi_device_add(device, acpi_device_release); |
d43e167d | 1454 | if (result) { |
718fb0de | 1455 | acpi_device_release(&device->dev); |
d43e167d RW |
1456 | return result; |
1457 | } | |
1da177e4 | 1458 | |
d43e167d | 1459 | acpi_power_add_remove_device(device, true); |
cf860be6 | 1460 | acpi_device_add_finalize(device); |
d43e167d RW |
1461 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); |
1462 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Added %s [%s] parent %s\n", | |
1463 | dev_name(&device->dev), (char *) buffer.pointer, | |
1464 | device->parent ? dev_name(&device->parent->dev) : "(null)")); | |
1465 | kfree(buffer.pointer); | |
1466 | *child = device; | |
1467 | return 0; | |
bf325f95 RW |
1468 | } |
1469 | ||
778cbc1d BH |
1470 | static int acpi_bus_type_and_status(acpi_handle handle, int *type, |
1471 | unsigned long long *sta) | |
1da177e4 | 1472 | { |
778cbc1d BH |
1473 | acpi_status status; |
1474 | acpi_object_type acpi_type; | |
1da177e4 | 1475 | |
778cbc1d | 1476 | status = acpi_get_type(handle, &acpi_type); |
51a85faf | 1477 | if (ACPI_FAILURE(status)) |
778cbc1d | 1478 | return -ENODEV; |
4be44fcd | 1479 | |
778cbc1d | 1480 | switch (acpi_type) { |
51a85faf BH |
1481 | case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */ |
1482 | case ACPI_TYPE_DEVICE: | |
778cbc1d BH |
1483 | *type = ACPI_BUS_TYPE_DEVICE; |
1484 | status = acpi_bus_get_status_handle(handle, sta); | |
1485 | if (ACPI_FAILURE(status)) | |
1486 | return -ENODEV; | |
51a85faf BH |
1487 | break; |
1488 | case ACPI_TYPE_PROCESSOR: | |
778cbc1d BH |
1489 | *type = ACPI_BUS_TYPE_PROCESSOR; |
1490 | status = acpi_bus_get_status_handle(handle, sta); | |
1491 | if (ACPI_FAILURE(status)) | |
1492 | return -ENODEV; | |
51a85faf BH |
1493 | break; |
1494 | case ACPI_TYPE_THERMAL: | |
778cbc1d BH |
1495 | *type = ACPI_BUS_TYPE_THERMAL; |
1496 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1497 | break; |
1498 | case ACPI_TYPE_POWER: | |
778cbc1d BH |
1499 | *type = ACPI_BUS_TYPE_POWER; |
1500 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1501 | break; |
1502 | default: | |
778cbc1d | 1503 | return -ENODEV; |
51a85faf | 1504 | } |
1da177e4 | 1505 | |
778cbc1d BH |
1506 | return 0; |
1507 | } | |
1508 | ||
e3863094 RW |
1509 | static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used, |
1510 | void *not_used, void **return_value) | |
778cbc1d | 1511 | { |
805d410f | 1512 | struct acpi_device *device = NULL; |
778cbc1d BH |
1513 | int type; |
1514 | unsigned long long sta; | |
e3b87f8a | 1515 | acpi_status status; |
778cbc1d BH |
1516 | int result; |
1517 | ||
4002bf38 RW |
1518 | acpi_bus_get_device(handle, &device); |
1519 | if (device) | |
1520 | goto out; | |
1521 | ||
778cbc1d BH |
1522 | result = acpi_bus_type_and_status(handle, &type, &sta); |
1523 | if (result) | |
1524 | return AE_OK; | |
1525 | ||
82c7d5ef RW |
1526 | if (type == ACPI_BUS_TYPE_POWER) { |
1527 | acpi_add_power_resource(handle); | |
1528 | return AE_OK; | |
1529 | } | |
1530 | ||
778cbc1d | 1531 | if (!(sta & ACPI_STA_DEVICE_PRESENT) && |
b581a7f9 | 1532 | !(sta & ACPI_STA_DEVICE_FUNCTIONING)) { |
86e4e20e RW |
1533 | struct acpi_device_wakeup wakeup; |
1534 | acpi_handle temp; | |
1535 | ||
1536 | status = acpi_get_handle(handle, "_PRW", &temp); | |
993cbe59 | 1537 | if (ACPI_SUCCESS(status)) { |
86e4e20e RW |
1538 | acpi_bus_extract_wakeup_device_power_package(handle, |
1539 | &wakeup); | |
993cbe59 RW |
1540 | acpi_power_resources_list_free(&wakeup.resources); |
1541 | } | |
778cbc1d | 1542 | return AE_CTRL_DEPTH; |
b581a7f9 | 1543 | } |
778cbc1d | 1544 | |
2c0d4fe0 | 1545 | acpi_add_single_object(&device, handle, type, sta); |
e3b87f8a | 1546 | if (!device) |
51a85faf | 1547 | return AE_CTRL_DEPTH; |
1da177e4 | 1548 | |
4002bf38 | 1549 | out: |
51a85faf BH |
1550 | if (!*return_value) |
1551 | *return_value = device; | |
805d410f | 1552 | |
51a85faf BH |
1553 | return AE_OK; |
1554 | } | |
3fb02738 | 1555 | |
87b85b3c | 1556 | static int acpi_scan_do_attach_handler(struct acpi_device *device, char *id) |
ca589f94 RW |
1557 | { |
1558 | struct acpi_scan_handler *handler; | |
ca589f94 RW |
1559 | |
1560 | list_for_each_entry(handler, &acpi_scan_handlers_list, list_node) { | |
87b85b3c | 1561 | const struct acpi_device_id *devid; |
ca589f94 | 1562 | |
87b85b3c RW |
1563 | for (devid = handler->ids; devid->id[0]; devid++) { |
1564 | int ret; | |
ca589f94 | 1565 | |
87b85b3c RW |
1566 | if (strcmp((char *)devid->id, id)) |
1567 | continue; | |
1568 | ||
1569 | ret = handler->attach(device, devid); | |
1570 | if (ret > 0) { | |
1571 | device->handler = handler; | |
1572 | return ret; | |
1573 | } else if (ret < 0) { | |
1574 | return ret; | |
1575 | } | |
ca589f94 RW |
1576 | } |
1577 | } | |
87b85b3c RW |
1578 | return 0; |
1579 | } | |
1580 | ||
1581 | static int acpi_scan_attach_handler(struct acpi_device *device) | |
1582 | { | |
1583 | struct acpi_hardware_id *hwid; | |
1584 | int ret = 0; | |
1585 | ||
1586 | list_for_each_entry(hwid, &device->pnp.ids, list) { | |
1587 | ret = acpi_scan_do_attach_handler(device, hwid->id); | |
1588 | if (ret) | |
1589 | break; | |
1590 | ||
1591 | } | |
ca589f94 RW |
1592 | return ret; |
1593 | } | |
1594 | ||
0fc300b0 RW |
1595 | static acpi_status acpi_bus_device_attach(acpi_handle handle, u32 lvl_not_used, |
1596 | void *not_used, void **ret_not_used) | |
51a85faf | 1597 | { |
805d410f RW |
1598 | struct acpi_device *device; |
1599 | unsigned long long sta_not_used; | |
ca589f94 | 1600 | int ret; |
3fb02738 | 1601 | |
805d410f RW |
1602 | /* |
1603 | * Ignore errors ignored by acpi_bus_check_add() to avoid terminating | |
1604 | * namespace walks prematurely. | |
1605 | */ | |
ca589f94 | 1606 | if (acpi_bus_type_and_status(handle, &ret, &sta_not_used)) |
805d410f | 1607 | return AE_OK; |
1da177e4 | 1608 | |
805d410f RW |
1609 | if (acpi_bus_get_device(handle, &device)) |
1610 | return AE_CTRL_DEPTH; | |
7779688f | 1611 | |
ca589f94 RW |
1612 | ret = acpi_scan_attach_handler(device); |
1613 | if (ret) | |
1614 | return ret > 0 ? AE_OK : AE_CTRL_DEPTH; | |
1615 | ||
1616 | ret = device_attach(&device->dev); | |
1617 | return ret >= 0 ? AE_OK : AE_CTRL_DEPTH; | |
1da177e4 | 1618 | } |
1da177e4 | 1619 | |
636458de | 1620 | /** |
b8bd759a | 1621 | * acpi_bus_scan - Add ACPI device node objects in a given namespace scope. |
636458de | 1622 | * @handle: Root of the namespace scope to scan. |
7779688f | 1623 | * |
636458de RW |
1624 | * Scan a given ACPI tree (probably recently hot-plugged) and create and add |
1625 | * found devices. | |
7779688f | 1626 | * |
636458de RW |
1627 | * If no devices were found, -ENODEV is returned, but it does not mean that |
1628 | * there has been a real error. There just have been no suitable ACPI objects | |
1629 | * in the table trunk from which the kernel could create a device and add an | |
1630 | * appropriate driver. | |
7779688f | 1631 | */ |
b8bd759a | 1632 | int acpi_bus_scan(acpi_handle handle) |
3fb02738 | 1633 | { |
b8bd759a | 1634 | void *device = NULL; |
c511cc19 RW |
1635 | int error = 0; |
1636 | ||
1637 | mutex_lock(&acpi_scan_lock); | |
3fb02738 | 1638 | |
b8bd759a RW |
1639 | if (ACPI_SUCCESS(acpi_bus_check_add(handle, 0, NULL, &device))) |
1640 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
1641 | acpi_bus_check_add, NULL, NULL, &device); | |
3fb02738 | 1642 | |
d2f6650a | 1643 | if (!device) |
c511cc19 RW |
1644 | error = -ENODEV; |
1645 | else if (ACPI_SUCCESS(acpi_bus_device_attach(handle, 0, NULL, NULL))) | |
b8bd759a RW |
1646 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
1647 | acpi_bus_device_attach, NULL, NULL, NULL); | |
a2100801 | 1648 | |
c511cc19 RW |
1649 | mutex_unlock(&acpi_scan_lock); |
1650 | return error; | |
3fb02738 | 1651 | } |
b8bd759a | 1652 | EXPORT_SYMBOL(acpi_bus_scan); |
1da177e4 | 1653 | |
05404d8f RW |
1654 | static acpi_status acpi_bus_device_detach(acpi_handle handle, u32 lvl_not_used, |
1655 | void *not_used, void **ret_not_used) | |
1da177e4 | 1656 | { |
05404d8f | 1657 | struct acpi_device *device = NULL; |
4be44fcd | 1658 | |
05404d8f | 1659 | if (!acpi_bus_get_device(handle, &device)) { |
ca589f94 RW |
1660 | struct acpi_scan_handler *dev_handler = device->handler; |
1661 | ||
05404d8f | 1662 | device->removal_type = ACPI_BUS_REMOVAL_EJECT; |
ca589f94 RW |
1663 | if (dev_handler) { |
1664 | if (dev_handler->detach) | |
1665 | dev_handler->detach(device); | |
1666 | ||
1667 | device->handler = NULL; | |
1668 | } else { | |
1669 | device_release_driver(&device->dev); | |
1670 | } | |
05404d8f RW |
1671 | } |
1672 | return AE_OK; | |
1673 | } | |
1da177e4 | 1674 | |
05404d8f RW |
1675 | static acpi_status acpi_bus_remove(acpi_handle handle, u32 lvl_not_used, |
1676 | void *not_used, void **ret_not_used) | |
1677 | { | |
1678 | struct acpi_device *device = NULL; | |
1da177e4 | 1679 | |
05404d8f RW |
1680 | if (!acpi_bus_get_device(handle, &device)) |
1681 | acpi_device_unregister(device); | |
1da177e4 | 1682 | |
05404d8f RW |
1683 | return AE_OK; |
1684 | } | |
1da177e4 | 1685 | |
f058cdf4 | 1686 | static void __acpi_bus_trim(struct acpi_device *start) |
1da177e4 | 1687 | { |
05404d8f RW |
1688 | /* |
1689 | * Execute acpi_bus_device_detach() as a post-order callback to detach | |
1690 | * all ACPI drivers from the device nodes being removed. | |
1691 | */ | |
1692 | acpi_walk_namespace(ACPI_TYPE_ANY, start->handle, ACPI_UINT32_MAX, NULL, | |
1693 | acpi_bus_device_detach, NULL, NULL); | |
1694 | acpi_bus_device_detach(start->handle, 0, NULL, NULL); | |
cecdb193 RW |
1695 | /* |
1696 | * Execute acpi_bus_remove() as a post-order callback to remove device | |
1697 | * nodes in the given namespace scope. | |
1698 | */ | |
1699 | acpi_walk_namespace(ACPI_TYPE_ANY, start->handle, ACPI_UINT32_MAX, NULL, | |
1700 | acpi_bus_remove, NULL, NULL); | |
1701 | acpi_bus_remove(start->handle, 0, NULL, NULL); | |
f058cdf4 | 1702 | } |
c511cc19 | 1703 | |
f058cdf4 RW |
1704 | void acpi_bus_trim(struct acpi_device *start) |
1705 | { | |
1706 | mutex_lock(&acpi_scan_lock); | |
1707 | __acpi_bus_trim(start); | |
c511cc19 | 1708 | mutex_unlock(&acpi_scan_lock); |
1da177e4 | 1709 | } |
ceaba663 KA |
1710 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
1711 | ||
e8b945c9 | 1712 | static int acpi_bus_scan_fixed(void) |
1da177e4 | 1713 | { |
4be44fcd | 1714 | int result = 0; |
c4168bff | 1715 | |
1da177e4 LT |
1716 | /* |
1717 | * Enumerate all fixed-feature devices. | |
1718 | */ | |
2c0d4fe0 RW |
1719 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON)) { |
1720 | struct acpi_device *device = NULL; | |
1721 | ||
5c478f49 | 1722 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1723 | ACPI_BUS_TYPE_POWER_BUTTON, |
2c0d4fe0 RW |
1724 | ACPI_STA_DEFAULT); |
1725 | if (result) | |
1726 | return result; | |
1727 | ||
1728 | result = device_attach(&device->dev); | |
1729 | if (result < 0) | |
1730 | return result; | |
1731 | ||
c10d7a13 | 1732 | device_init_wakeup(&device->dev, true); |
3fb02738 | 1733 | } |
1da177e4 | 1734 | |
2c0d4fe0 RW |
1735 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON)) { |
1736 | struct acpi_device *device = NULL; | |
1737 | ||
5c478f49 | 1738 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1739 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
2c0d4fe0 RW |
1740 | ACPI_STA_DEFAULT); |
1741 | if (result) | |
1742 | return result; | |
1743 | ||
1744 | result = device_attach(&device->dev); | |
3fb02738 | 1745 | } |
1da177e4 | 1746 | |
2c0d4fe0 | 1747 | return result < 0 ? result : 0; |
1da177e4 LT |
1748 | } |
1749 | ||
e747f274 | 1750 | int __init acpi_scan_init(void) |
1da177e4 LT |
1751 | { |
1752 | int result; | |
1da177e4 | 1753 | |
5b327265 PM |
1754 | result = bus_register(&acpi_bus_type); |
1755 | if (result) { | |
1756 | /* We don't want to quit even if we failed to add suspend/resume */ | |
1757 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
1758 | } | |
1759 | ||
92ef2a25 | 1760 | acpi_pci_root_init(); |
4daeaf68 | 1761 | acpi_pci_link_init(); |
141a297b | 1762 | acpi_platform_init(); |
13176bbf | 1763 | acpi_csrt_init(); |
737f1a9f | 1764 | acpi_container_init(); |
97d9a9e9 | 1765 | |
1da177e4 LT |
1766 | /* |
1767 | * Enumerate devices in the ACPI namespace. | |
1768 | */ | |
0cd6ac52 RW |
1769 | result = acpi_bus_scan(ACPI_ROOT_OBJECT); |
1770 | if (result) | |
1771 | return result; | |
1da177e4 | 1772 | |
0cd6ac52 | 1773 | result = acpi_bus_get_device(ACPI_ROOT_OBJECT, &acpi_root); |
1da177e4 | 1774 | if (result) |
b8bd759a | 1775 | return result; |
1da177e4 | 1776 | |
b8bd759a RW |
1777 | result = acpi_bus_scan_fixed(); |
1778 | if (result) { | |
b17b537a | 1779 | acpi_device_unregister(acpi_root); |
b8bd759a RW |
1780 | return result; |
1781 | } | |
1da177e4 | 1782 | |
b8bd759a RW |
1783 | acpi_update_all_gpes(); |
1784 | return 0; | |
1da177e4 | 1785 | } |