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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 | 40 | /* Haswell LPSS devices */ |
e375325c MW |
41 | { "INT33C0", ACPI_PLATFORM_CLK }, |
42 | { "INT33C1", ACPI_PLATFORM_CLK }, | |
43 | { "INT33C2", ACPI_PLATFORM_CLK }, | |
44 | { "INT33C3", ACPI_PLATFORM_CLK }, | |
45 | { "INT33C4", ACPI_PLATFORM_CLK }, | |
46 | { "INT33C5", ACPI_PLATFORM_CLK }, | |
47 | { "INT33C6", ACPI_PLATFORM_CLK }, | |
48 | { "INT33C7", ACPI_PLATFORM_CLK }, | |
5e7779f0 | 49 | |
91e56878 MW |
50 | { } |
51 | }; | |
52 | ||
1da177e4 | 53 | static LIST_HEAD(acpi_device_list); |
e49bd2dd | 54 | static LIST_HEAD(acpi_bus_id_list); |
c511cc19 | 55 | static DEFINE_MUTEX(acpi_scan_lock); |
ca589f94 | 56 | static LIST_HEAD(acpi_scan_handlers_list); |
9090589d | 57 | DEFINE_MUTEX(acpi_device_lock); |
1da177e4 LT |
58 | LIST_HEAD(acpi_wakeup_device_list); |
59 | ||
e49bd2dd | 60 | struct acpi_device_bus_id{ |
bb095854 | 61 | char bus_id[15]; |
e49bd2dd ZR |
62 | unsigned int instance_no; |
63 | struct list_head node; | |
1da177e4 | 64 | }; |
29b71a1c | 65 | |
ca589f94 RW |
66 | int acpi_scan_add_handler(struct acpi_scan_handler *handler) |
67 | { | |
68 | if (!handler || !handler->attach) | |
69 | return -EINVAL; | |
70 | ||
71 | list_add_tail(&handler->list_node, &acpi_scan_handlers_list); | |
72 | return 0; | |
73 | } | |
74 | ||
29b71a1c TR |
75 | /* |
76 | * Creates hid/cid(s) string needed for modalias and uevent | |
77 | * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: | |
78 | * char *modalias: "acpi:IBM0001:ACPI0001" | |
79 | */ | |
b3e572d2 AB |
80 | static int create_modalias(struct acpi_device *acpi_dev, char *modalias, |
81 | int size) | |
82 | { | |
29b71a1c | 83 | int len; |
5c9fcb5d | 84 | int count; |
7f47fa6c | 85 | struct acpi_hardware_id *id; |
29b71a1c | 86 | |
2b2ae7c7 TR |
87 | if (list_empty(&acpi_dev->pnp.ids)) |
88 | return 0; | |
89 | ||
5c9fcb5d | 90 | len = snprintf(modalias, size, "acpi:"); |
29b71a1c TR |
91 | size -= len; |
92 | ||
7f47fa6c BH |
93 | list_for_each_entry(id, &acpi_dev->pnp.ids, list) { |
94 | count = snprintf(&modalias[len], size, "%s:", id->id); | |
5c9fcb5d ZR |
95 | if (count < 0 || count >= size) |
96 | return -EINVAL; | |
97 | len += count; | |
98 | size -= count; | |
99 | } | |
100 | ||
29b71a1c TR |
101 | modalias[len] = '\0'; |
102 | return len; | |
103 | } | |
104 | ||
105 | static ssize_t | |
106 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
107 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
108 | int len; | |
109 | ||
110 | /* Device has no HID and no CID or string is >1024 */ | |
111 | len = create_modalias(acpi_dev, buf, 1024); | |
112 | if (len <= 0) | |
113 | return 0; | |
114 | buf[len++] = '\n'; | |
115 | return len; | |
116 | } | |
117 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); | |
118 | ||
c4753e57 TK |
119 | /** |
120 | * acpi_bus_hot_remove_device: hot-remove a device and its children | |
121 | * @context: struct acpi_eject_event pointer (freed in this func) | |
122 | * | |
123 | * Hot-remove a device and its children. This function frees up the | |
124 | * memory space passed by arg context, so that the caller may call | |
125 | * this function asynchronously through acpi_os_hotplug_execute(). | |
126 | */ | |
127 | void acpi_bus_hot_remove_device(void *context) | |
1da177e4 | 128 | { |
c4753e57 | 129 | struct acpi_eject_event *ej_event = (struct acpi_eject_event *) context; |
5993c467 YL |
130 | struct acpi_device *device = ej_event->device; |
131 | acpi_handle handle = device->handle; | |
b3c450c3 | 132 | acpi_handle temp; |
1da177e4 LT |
133 | struct acpi_object_list arg_list; |
134 | union acpi_object arg; | |
135 | acpi_status status = AE_OK; | |
c4753e57 | 136 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; /* default */ |
1da177e4 | 137 | |
26d46867 | 138 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
0794469d | 139 | "Hot-removing device %s...\n", dev_name(&device->dev))); |
26d46867 | 140 | |
bfee26db RW |
141 | acpi_bus_trim(device); |
142 | /* Device node has been released. */ | |
b3c450c3 TK |
143 | device = NULL; |
144 | ||
26d46867 ZR |
145 | /* power off device */ |
146 | status = acpi_evaluate_object(handle, "_PS3", NULL, NULL); | |
147 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) | |
55ac9a01 LM |
148 | printk(KERN_WARNING PREFIX |
149 | "Power-off device failed\n"); | |
26d46867 | 150 | |
b3c450c3 | 151 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_LCK", &temp))) { |
1da177e4 LT |
152 | arg_list.count = 1; |
153 | arg_list.pointer = &arg; | |
154 | arg.type = ACPI_TYPE_INTEGER; | |
155 | arg.integer.value = 0; | |
156 | acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); | |
157 | } | |
1da177e4 | 158 | |
1da177e4 LT |
159 | arg_list.count = 1; |
160 | arg_list.pointer = &arg; | |
161 | arg.type = ACPI_TYPE_INTEGER; | |
162 | arg.integer.value = 1; | |
1da177e4 | 163 | |
1da177e4 LT |
164 | /* |
165 | * TBD: _EJD support. | |
166 | */ | |
1da177e4 | 167 | status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); |
c4753e57 TK |
168 | if (ACPI_FAILURE(status)) { |
169 | if (status != AE_NOT_FOUND) | |
170 | printk(KERN_WARNING PREFIX | |
171 | "Eject device failed\n"); | |
172 | goto err_out; | |
173 | } | |
1da177e4 | 174 | |
c4753e57 TK |
175 | kfree(context); |
176 | return; | |
1da177e4 | 177 | |
c4753e57 TK |
178 | err_out: |
179 | /* Inform firmware the hot-remove operation has completed w/ error */ | |
180 | (void) acpi_evaluate_hotplug_ost(handle, | |
181 | ej_event->event, ost_code, NULL); | |
182 | kfree(context); | |
c8d72a5e | 183 | return; |
1da177e4 | 184 | } |
61622acc | 185 | EXPORT_SYMBOL(acpi_bus_hot_remove_device); |
1da177e4 | 186 | |
836aedb1 RW |
187 | static ssize_t real_power_state_show(struct device *dev, |
188 | struct device_attribute *attr, char *buf) | |
189 | { | |
190 | struct acpi_device *adev = to_acpi_device(dev); | |
191 | int state; | |
192 | int ret; | |
193 | ||
194 | ret = acpi_device_get_power(adev, &state); | |
195 | if (ret) | |
196 | return ret; | |
197 | ||
198 | return sprintf(buf, "%s\n", acpi_power_state_string(state)); | |
199 | } | |
200 | ||
201 | static DEVICE_ATTR(real_power_state, 0444, real_power_state_show, NULL); | |
202 | ||
203 | static ssize_t power_state_show(struct device *dev, | |
204 | struct device_attribute *attr, char *buf) | |
205 | { | |
206 | struct acpi_device *adev = to_acpi_device(dev); | |
207 | ||
208 | return sprintf(buf, "%s\n", acpi_power_state_string(adev->power.state)); | |
209 | } | |
210 | ||
211 | static DEVICE_ATTR(power_state, 0444, power_state_show, NULL); | |
212 | ||
1da177e4 | 213 | static ssize_t |
f883d9db PM |
214 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
215 | const char *buf, size_t count) | |
1da177e4 | 216 | { |
4be44fcd | 217 | int ret = count; |
4be44fcd | 218 | acpi_status status; |
4be44fcd | 219 | acpi_object_type type = 0; |
f883d9db | 220 | struct acpi_device *acpi_device = to_acpi_device(d); |
c4753e57 | 221 | struct acpi_eject_event *ej_event; |
1da177e4 | 222 | |
1da177e4 LT |
223 | if ((!count) || (buf[0] != '1')) { |
224 | return -EINVAL; | |
225 | } | |
1da177e4 | 226 | #ifndef FORCE_EJECT |
f883d9db | 227 | if (acpi_device->driver == NULL) { |
1da177e4 LT |
228 | ret = -ENODEV; |
229 | goto err; | |
230 | } | |
231 | #endif | |
f883d9db PM |
232 | status = acpi_get_type(acpi_device->handle, &type); |
233 | if (ACPI_FAILURE(status) || (!acpi_device->flags.ejectable)) { | |
1da177e4 LT |
234 | ret = -ENODEV; |
235 | goto err; | |
236 | } | |
1da177e4 | 237 | |
c4753e57 TK |
238 | ej_event = kmalloc(sizeof(*ej_event), GFP_KERNEL); |
239 | if (!ej_event) { | |
240 | ret = -ENOMEM; | |
241 | goto err; | |
242 | } | |
243 | ||
5993c467 | 244 | ej_event->device = acpi_device; |
c4753e57 TK |
245 | if (acpi_device->flags.eject_pending) { |
246 | /* event originated from ACPI eject notification */ | |
247 | ej_event->event = ACPI_NOTIFY_EJECT_REQUEST; | |
248 | acpi_device->flags.eject_pending = 0; | |
249 | } else { | |
250 | /* event originated from user */ | |
251 | ej_event->event = ACPI_OST_EC_OSPM_EJECT; | |
5993c467 | 252 | (void) acpi_evaluate_hotplug_ost(acpi_device->handle, |
c4753e57 TK |
253 | ej_event->event, ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); |
254 | } | |
255 | ||
256 | acpi_os_hotplug_execute(acpi_bus_hot_remove_device, (void *)ej_event); | |
74523c90 | 257 | err: |
1da177e4 | 258 | return ret; |
1da177e4 LT |
259 | } |
260 | ||
f883d9db | 261 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
1da177e4 | 262 | |
e49bd2dd ZR |
263 | static ssize_t |
264 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
265 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1da177e4 | 266 | |
ea8d82fd | 267 | return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev)); |
1da177e4 | 268 | } |
e49bd2dd | 269 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
1da177e4 | 270 | |
923d4a45 LZ |
271 | static ssize_t acpi_device_uid_show(struct device *dev, |
272 | struct device_attribute *attr, char *buf) | |
273 | { | |
274 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
275 | ||
276 | return sprintf(buf, "%s\n", acpi_dev->pnp.unique_id); | |
277 | } | |
278 | static DEVICE_ATTR(uid, 0444, acpi_device_uid_show, NULL); | |
279 | ||
280 | static ssize_t acpi_device_adr_show(struct device *dev, | |
281 | struct device_attribute *attr, char *buf) | |
282 | { | |
283 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
284 | ||
285 | return sprintf(buf, "0x%08x\n", | |
286 | (unsigned int)(acpi_dev->pnp.bus_address)); | |
287 | } | |
288 | static DEVICE_ATTR(adr, 0444, acpi_device_adr_show, NULL); | |
289 | ||
e49bd2dd ZR |
290 | static ssize_t |
291 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
292 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
293 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
294 | int result; | |
1da177e4 | 295 | |
e49bd2dd | 296 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
0c526d96 | 297 | if (result) |
e49bd2dd | 298 | goto end; |
1da177e4 | 299 | |
e49bd2dd ZR |
300 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
301 | kfree(path.pointer); | |
0c526d96 | 302 | end: |
e49bd2dd | 303 | return result; |
1da177e4 | 304 | } |
e49bd2dd | 305 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
1da177e4 | 306 | |
d1efe3c3 LO |
307 | /* sysfs file that shows description text from the ACPI _STR method */ |
308 | static ssize_t description_show(struct device *dev, | |
309 | struct device_attribute *attr, | |
310 | char *buf) { | |
311 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
312 | int result; | |
313 | ||
314 | if (acpi_dev->pnp.str_obj == NULL) | |
315 | return 0; | |
316 | ||
317 | /* | |
318 | * The _STR object contains a Unicode identifier for a device. | |
319 | * We need to convert to utf-8 so it can be displayed. | |
320 | */ | |
321 | result = utf16s_to_utf8s( | |
322 | (wchar_t *)acpi_dev->pnp.str_obj->buffer.pointer, | |
323 | acpi_dev->pnp.str_obj->buffer.length, | |
324 | UTF16_LITTLE_ENDIAN, buf, | |
325 | PAGE_SIZE); | |
326 | ||
327 | buf[result++] = '\n'; | |
328 | ||
329 | return result; | |
330 | } | |
331 | static DEVICE_ATTR(description, 0444, description_show, NULL); | |
332 | ||
bb74ac23 YI |
333 | static ssize_t |
334 | acpi_device_sun_show(struct device *dev, struct device_attribute *attr, | |
335 | char *buf) { | |
336 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
337 | ||
338 | return sprintf(buf, "%lu\n", acpi_dev->pnp.sun); | |
339 | } | |
340 | static DEVICE_ATTR(sun, 0444, acpi_device_sun_show, NULL); | |
341 | ||
e49bd2dd | 342 | static int acpi_device_setup_files(struct acpi_device *dev) |
1da177e4 | 343 | { |
d1efe3c3 | 344 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
f883d9db PM |
345 | acpi_status status; |
346 | acpi_handle temp; | |
bb74ac23 | 347 | unsigned long long sun; |
e49bd2dd | 348 | int result = 0; |
1da177e4 LT |
349 | |
350 | /* | |
e49bd2dd | 351 | * Devices gotten from FADT don't have a "path" attribute |
1da177e4 | 352 | */ |
0c526d96 | 353 | if (dev->handle) { |
e49bd2dd | 354 | result = device_create_file(&dev->dev, &dev_attr_path); |
0c526d96 | 355 | if (result) |
e49bd2dd | 356 | goto end; |
1da177e4 LT |
357 | } |
358 | ||
2b2ae7c7 TR |
359 | if (!list_empty(&dev->pnp.ids)) { |
360 | result = device_create_file(&dev->dev, &dev_attr_hid); | |
361 | if (result) | |
362 | goto end; | |
1da177e4 | 363 | |
2b2ae7c7 TR |
364 | result = device_create_file(&dev->dev, &dev_attr_modalias); |
365 | if (result) | |
366 | goto end; | |
367 | } | |
29b71a1c | 368 | |
d1efe3c3 LO |
369 | /* |
370 | * If device has _STR, 'description' file is created | |
371 | */ | |
372 | status = acpi_get_handle(dev->handle, "_STR", &temp); | |
373 | if (ACPI_SUCCESS(status)) { | |
374 | status = acpi_evaluate_object(dev->handle, "_STR", | |
375 | NULL, &buffer); | |
376 | if (ACPI_FAILURE(status)) | |
377 | buffer.pointer = NULL; | |
378 | dev->pnp.str_obj = buffer.pointer; | |
379 | result = device_create_file(&dev->dev, &dev_attr_description); | |
380 | if (result) | |
381 | goto end; | |
382 | } | |
383 | ||
923d4a45 LZ |
384 | if (dev->flags.bus_address) |
385 | result = device_create_file(&dev->dev, &dev_attr_adr); | |
386 | if (dev->pnp.unique_id) | |
387 | result = device_create_file(&dev->dev, &dev_attr_uid); | |
388 | ||
bb74ac23 YI |
389 | status = acpi_evaluate_integer(dev->handle, "_SUN", NULL, &sun); |
390 | if (ACPI_SUCCESS(status)) { | |
391 | dev->pnp.sun = (unsigned long)sun; | |
392 | result = device_create_file(&dev->dev, &dev_attr_sun); | |
393 | if (result) | |
394 | goto end; | |
395 | } else { | |
396 | dev->pnp.sun = (unsigned long)-1; | |
397 | } | |
398 | ||
e49bd2dd ZR |
399 | /* |
400 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
401 | * hot-removal function from userland. | |
402 | */ | |
f883d9db | 403 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); |
836aedb1 | 404 | if (ACPI_SUCCESS(status)) { |
e49bd2dd | 405 | result = device_create_file(&dev->dev, &dev_attr_eject); |
836aedb1 RW |
406 | if (result) |
407 | return result; | |
408 | } | |
409 | ||
410 | if (dev->flags.power_manageable) { | |
411 | result = device_create_file(&dev->dev, &dev_attr_power_state); | |
412 | if (result) | |
413 | return result; | |
414 | ||
415 | if (dev->power.flags.power_resources) | |
416 | result = device_create_file(&dev->dev, | |
417 | &dev_attr_real_power_state); | |
418 | } | |
419 | ||
0c526d96 | 420 | end: |
e49bd2dd | 421 | return result; |
1da177e4 LT |
422 | } |
423 | ||
f883d9db | 424 | static void acpi_device_remove_files(struct acpi_device *dev) |
1da177e4 | 425 | { |
f883d9db PM |
426 | acpi_status status; |
427 | acpi_handle temp; | |
1da177e4 | 428 | |
836aedb1 RW |
429 | if (dev->flags.power_manageable) { |
430 | device_remove_file(&dev->dev, &dev_attr_power_state); | |
431 | if (dev->power.flags.power_resources) | |
432 | device_remove_file(&dev->dev, | |
433 | &dev_attr_real_power_state); | |
434 | } | |
435 | ||
f883d9db | 436 | /* |
d1efe3c3 LO |
437 | * If device has _STR, remove 'description' file |
438 | */ | |
439 | status = acpi_get_handle(dev->handle, "_STR", &temp); | |
440 | if (ACPI_SUCCESS(status)) { | |
441 | kfree(dev->pnp.str_obj); | |
442 | device_remove_file(&dev->dev, &dev_attr_description); | |
443 | } | |
444 | /* | |
445 | * If device has _EJ0, remove 'eject' file. | |
f883d9db PM |
446 | */ |
447 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); | |
448 | if (ACPI_SUCCESS(status)) | |
449 | device_remove_file(&dev->dev, &dev_attr_eject); | |
1da177e4 | 450 | |
bb74ac23 YI |
451 | status = acpi_get_handle(dev->handle, "_SUN", &temp); |
452 | if (ACPI_SUCCESS(status)) | |
453 | device_remove_file(&dev->dev, &dev_attr_sun); | |
454 | ||
923d4a45 LZ |
455 | if (dev->pnp.unique_id) |
456 | device_remove_file(&dev->dev, &dev_attr_uid); | |
457 | if (dev->flags.bus_address) | |
458 | device_remove_file(&dev->dev, &dev_attr_adr); | |
1131b938 BH |
459 | device_remove_file(&dev->dev, &dev_attr_modalias); |
460 | device_remove_file(&dev->dev, &dev_attr_hid); | |
0c526d96 | 461 | if (dev->handle) |
e49bd2dd | 462 | device_remove_file(&dev->dev, &dev_attr_path); |
1da177e4 | 463 | } |
1da177e4 | 464 | /* -------------------------------------------------------------------------- |
9e89dde2 | 465 | ACPI Bus operations |
1da177e4 | 466 | -------------------------------------------------------------------------- */ |
29b71a1c | 467 | |
cf761af9 MW |
468 | static const struct acpi_device_id *__acpi_match_device( |
469 | struct acpi_device *device, const struct acpi_device_id *ids) | |
29b71a1c TR |
470 | { |
471 | const struct acpi_device_id *id; | |
7f47fa6c | 472 | struct acpi_hardware_id *hwid; |
29b71a1c | 473 | |
39a0ad87 ZY |
474 | /* |
475 | * If the device is not present, it is unnecessary to load device | |
476 | * driver for it. | |
477 | */ | |
478 | if (!device->status.present) | |
cf761af9 | 479 | return NULL; |
39a0ad87 | 480 | |
7f47fa6c BH |
481 | for (id = ids; id->id[0]; id++) |
482 | list_for_each_entry(hwid, &device->pnp.ids, list) | |
483 | if (!strcmp((char *) id->id, hwid->id)) | |
cf761af9 MW |
484 | return id; |
485 | ||
486 | return NULL; | |
487 | } | |
488 | ||
489 | /** | |
490 | * acpi_match_device - Match a struct device against a given list of ACPI IDs | |
491 | * @ids: Array of struct acpi_device_id object to match against. | |
492 | * @dev: The device structure to match. | |
493 | * | |
494 | * Check if @dev has a valid ACPI handle and if there is a struct acpi_device | |
495 | * object for that handle and use that object to match against a given list of | |
496 | * device IDs. | |
497 | * | |
498 | * Return a pointer to the first matching ID on success or %NULL on failure. | |
499 | */ | |
500 | const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids, | |
501 | const struct device *dev) | |
502 | { | |
503 | struct acpi_device *adev; | |
504 | ||
95f8a082 RW |
505 | if (!ids || !ACPI_HANDLE(dev) |
506 | || ACPI_FAILURE(acpi_bus_get_device(ACPI_HANDLE(dev), &adev))) | |
cf761af9 MW |
507 | return NULL; |
508 | ||
509 | return __acpi_match_device(adev, ids); | |
510 | } | |
511 | EXPORT_SYMBOL_GPL(acpi_match_device); | |
29b71a1c | 512 | |
cf761af9 MW |
513 | int acpi_match_device_ids(struct acpi_device *device, |
514 | const struct acpi_device_id *ids) | |
515 | { | |
516 | return __acpi_match_device(device, ids) ? 0 : -ENOENT; | |
29b71a1c TR |
517 | } |
518 | EXPORT_SYMBOL(acpi_match_device_ids); | |
519 | ||
82c7d5ef | 520 | void acpi_free_ids(struct acpi_device *device) |
7f47fa6c BH |
521 | { |
522 | struct acpi_hardware_id *id, *tmp; | |
523 | ||
524 | list_for_each_entry_safe(id, tmp, &device->pnp.ids, list) { | |
525 | kfree(id->id); | |
526 | kfree(id); | |
527 | } | |
d43e167d | 528 | kfree(device->pnp.unique_id); |
7f47fa6c BH |
529 | } |
530 | ||
0b224527 RW |
531 | static void acpi_free_power_resources_lists(struct acpi_device *device) |
532 | { | |
533 | int i; | |
534 | ||
993cbe59 RW |
535 | if (device->wakeup.flags.valid) |
536 | acpi_power_resources_list_free(&device->wakeup.resources); | |
537 | ||
0b224527 RW |
538 | if (!device->flags.power_manageable) |
539 | return; | |
540 | ||
541 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) { | |
542 | struct acpi_device_power_state *ps = &device->power.states[i]; | |
543 | acpi_power_resources_list_free(&ps->resources); | |
544 | } | |
7f47fa6c BH |
545 | } |
546 | ||
1890a97a | 547 | static void acpi_device_release(struct device *dev) |
1da177e4 | 548 | { |
1890a97a | 549 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 550 | |
7f47fa6c | 551 | acpi_free_ids(acpi_dev); |
0b224527 | 552 | acpi_free_power_resources_lists(acpi_dev); |
1890a97a | 553 | kfree(acpi_dev); |
1da177e4 LT |
554 | } |
555 | ||
5d9464a4 | 556 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 557 | { |
5d9464a4 PM |
558 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
559 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
1da177e4 | 560 | |
209d3b17 | 561 | return acpi_dev->flags.match_driver |
805d410f | 562 | && !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
5d9464a4 | 563 | } |
1da177e4 | 564 | |
7eff2e7a | 565 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 | 566 | { |
5d9464a4 | 567 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
7eff2e7a | 568 | int len; |
5d9464a4 | 569 | |
2b2ae7c7 TR |
570 | if (list_empty(&acpi_dev->pnp.ids)) |
571 | return 0; | |
572 | ||
7eff2e7a KS |
573 | if (add_uevent_var(env, "MODALIAS=")) |
574 | return -ENOMEM; | |
575 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], | |
576 | sizeof(env->buf) - env->buflen); | |
577 | if (len >= (sizeof(env->buf) - env->buflen)) | |
578 | return -ENOMEM; | |
579 | env->buflen += len; | |
9e89dde2 | 580 | return 0; |
1da177e4 LT |
581 | } |
582 | ||
46ec8598 BH |
583 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
584 | { | |
585 | struct acpi_device *device = data; | |
586 | ||
587 | device->driver->ops.notify(device, event); | |
588 | } | |
589 | ||
590 | static acpi_status acpi_device_notify_fixed(void *data) | |
591 | { | |
592 | struct acpi_device *device = data; | |
593 | ||
53de5356 BH |
594 | /* Fixed hardware devices have no handles */ |
595 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); | |
46ec8598 BH |
596 | return AE_OK; |
597 | } | |
598 | ||
599 | static int acpi_device_install_notify_handler(struct acpi_device *device) | |
600 | { | |
601 | acpi_status status; | |
46ec8598 | 602 | |
ccba2a36 | 603 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
604 | status = |
605 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
606 | acpi_device_notify_fixed, | |
607 | device); | |
ccba2a36 | 608 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
609 | status = |
610 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
611 | acpi_device_notify_fixed, | |
612 | device); | |
613 | else | |
614 | status = acpi_install_notify_handler(device->handle, | |
615 | ACPI_DEVICE_NOTIFY, | |
616 | acpi_device_notify, | |
617 | device); | |
618 | ||
619 | if (ACPI_FAILURE(status)) | |
620 | return -EINVAL; | |
621 | return 0; | |
622 | } | |
623 | ||
624 | static void acpi_device_remove_notify_handler(struct acpi_device *device) | |
625 | { | |
ccba2a36 | 626 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
627 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, |
628 | acpi_device_notify_fixed); | |
ccba2a36 | 629 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
630 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, |
631 | acpi_device_notify_fixed); | |
632 | else | |
633 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, | |
634 | acpi_device_notify); | |
635 | } | |
636 | ||
5d9464a4 | 637 | static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *); |
5d9464a4 | 638 | static int acpi_device_probe(struct device * dev) |
1da177e4 | 639 | { |
5d9464a4 PM |
640 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
641 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
642 | int ret; | |
643 | ||
644 | ret = acpi_bus_driver_init(acpi_dev, acpi_drv); | |
645 | if (!ret) { | |
46ec8598 BH |
646 | if (acpi_drv->ops.notify) { |
647 | ret = acpi_device_install_notify_handler(acpi_dev); | |
648 | if (ret) { | |
46ec8598 | 649 | if (acpi_drv->ops.remove) |
51fac838 | 650 | acpi_drv->ops.remove(acpi_dev); |
46ec8598 BH |
651 | return ret; |
652 | } | |
653 | } | |
654 | ||
5d9464a4 PM |
655 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
656 | "Found driver [%s] for device [%s]\n", | |
657 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
658 | get_device(dev); | |
659 | } | |
660 | return ret; | |
661 | } | |
1da177e4 | 662 | |
5d9464a4 PM |
663 | static int acpi_device_remove(struct device * dev) |
664 | { | |
665 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
666 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
667 | ||
668 | if (acpi_drv) { | |
46ec8598 BH |
669 | if (acpi_drv->ops.notify) |
670 | acpi_device_remove_notify_handler(acpi_dev); | |
5d9464a4 | 671 | if (acpi_drv->ops.remove) |
51fac838 | 672 | acpi_drv->ops.remove(acpi_dev); |
1da177e4 | 673 | } |
5d9464a4 | 674 | acpi_dev->driver = NULL; |
db89b4f0 | 675 | acpi_dev->driver_data = NULL; |
1da177e4 | 676 | |
5d9464a4 | 677 | put_device(dev); |
9e89dde2 ZR |
678 | return 0; |
679 | } | |
1da177e4 | 680 | |
55955aad | 681 | struct bus_type acpi_bus_type = { |
9e89dde2 | 682 | .name = "acpi", |
5d9464a4 PM |
683 | .match = acpi_bus_match, |
684 | .probe = acpi_device_probe, | |
685 | .remove = acpi_device_remove, | |
686 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
687 | }; |
688 | ||
cf860be6 RW |
689 | int acpi_device_add(struct acpi_device *device, |
690 | void (*release)(struct device *)) | |
1da177e4 | 691 | { |
4be44fcd | 692 | int result; |
e49bd2dd ZR |
693 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
694 | int found = 0; | |
66b7ed40 | 695 | |
d43e167d RW |
696 | if (device->handle) { |
697 | acpi_status status; | |
698 | ||
699 | status = acpi_attach_data(device->handle, acpi_bus_data_handler, | |
700 | device); | |
701 | if (ACPI_FAILURE(status)) { | |
702 | acpi_handle_err(device->handle, | |
703 | "Unable to attach device data\n"); | |
704 | return -ENODEV; | |
705 | } | |
706 | } | |
707 | ||
9e89dde2 ZR |
708 | /* |
709 | * Linkage | |
710 | * ------- | |
711 | * Link this device to its parent and siblings. | |
712 | */ | |
713 | INIT_LIST_HEAD(&device->children); | |
714 | INIT_LIST_HEAD(&device->node); | |
9e89dde2 | 715 | INIT_LIST_HEAD(&device->wakeup_list); |
1033f904 LT |
716 | INIT_LIST_HEAD(&device->physical_node_list); |
717 | mutex_init(&device->physical_node_lock); | |
bc9b6407 | 718 | INIT_LIST_HEAD(&device->power_dependent); |
1da177e4 | 719 | |
e49bd2dd ZR |
720 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
721 | if (!new_bus_id) { | |
d43e167d RW |
722 | pr_err(PREFIX "Memory allocation error\n"); |
723 | result = -ENOMEM; | |
724 | goto err_detach; | |
1da177e4 | 725 | } |
e49bd2dd | 726 | |
9090589d | 727 | mutex_lock(&acpi_device_lock); |
e49bd2dd ZR |
728 | /* |
729 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
730 | * If failed, create one and link it into acpi_bus_id_list | |
731 | */ | |
732 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
1131b938 BH |
733 | if (!strcmp(acpi_device_bus_id->bus_id, |
734 | acpi_device_hid(device))) { | |
735 | acpi_device_bus_id->instance_no++; | |
e49bd2dd ZR |
736 | found = 1; |
737 | kfree(new_bus_id); | |
738 | break; | |
739 | } | |
1da177e4 | 740 | } |
0c526d96 | 741 | if (!found) { |
e49bd2dd | 742 | acpi_device_bus_id = new_bus_id; |
1131b938 | 743 | strcpy(acpi_device_bus_id->bus_id, acpi_device_hid(device)); |
e49bd2dd ZR |
744 | acpi_device_bus_id->instance_no = 0; |
745 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 746 | } |
0794469d | 747 | dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 748 | |
33b57150 | 749 | if (device->parent) |
9e89dde2 | 750 | list_add_tail(&device->node, &device->parent->children); |
33b57150 | 751 | |
9e89dde2 ZR |
752 | if (device->wakeup.flags.valid) |
753 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
9090589d | 754 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 755 | |
1890a97a | 756 | if (device->parent) |
66b7ed40 | 757 | device->dev.parent = &device->parent->dev; |
1890a97a | 758 | device->dev.bus = &acpi_bus_type; |
82c7d5ef | 759 | device->dev.release = release; |
cf860be6 | 760 | result = device_add(&device->dev); |
0c526d96 | 761 | if (result) { |
8b12b922 | 762 | dev_err(&device->dev, "Error registering device\n"); |
d43e167d | 763 | goto err; |
1da177e4 | 764 | } |
1da177e4 | 765 | |
e49bd2dd | 766 | result = acpi_device_setup_files(device); |
0c526d96 | 767 | if (result) |
0794469d KS |
768 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
769 | dev_name(&device->dev)); | |
1da177e4 | 770 | |
96333578 | 771 | device->removal_type = ACPI_BUS_REMOVAL_NORMAL; |
1da177e4 | 772 | return 0; |
d43e167d RW |
773 | |
774 | err: | |
9090589d | 775 | mutex_lock(&acpi_device_lock); |
33b57150 | 776 | if (device->parent) |
e49bd2dd | 777 | list_del(&device->node); |
e49bd2dd | 778 | list_del(&device->wakeup_list); |
9090589d | 779 | mutex_unlock(&acpi_device_lock); |
d43e167d RW |
780 | |
781 | err_detach: | |
782 | acpi_detach_data(device->handle, acpi_bus_data_handler); | |
e49bd2dd | 783 | return result; |
1da177e4 LT |
784 | } |
785 | ||
b17b537a | 786 | static void acpi_device_unregister(struct acpi_device *device) |
9e89dde2 | 787 | { |
9090589d | 788 | mutex_lock(&acpi_device_lock); |
33b57150 | 789 | if (device->parent) |
9e89dde2 | 790 | list_del(&device->node); |
1da177e4 | 791 | |
9e89dde2 | 792 | list_del(&device->wakeup_list); |
9090589d | 793 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 794 | |
9e89dde2 | 795 | acpi_detach_data(device->handle, acpi_bus_data_handler); |
1890a97a | 796 | |
bc9b6407 | 797 | acpi_power_add_remove_device(device, false); |
f883d9db | 798 | acpi_device_remove_files(device); |
b1c0f99b RW |
799 | if (device->remove) |
800 | device->remove(device); | |
801 | ||
cf860be6 | 802 | device_del(&device->dev); |
bc9b6407 RW |
803 | /* |
804 | * Drop the reference counts of all power resources the device depends | |
805 | * on and turn off the ones that have no more references. | |
806 | */ | |
807 | acpi_power_transition(device, ACPI_STATE_D3_COLD); | |
cf860be6 | 808 | put_device(&device->dev); |
1da177e4 LT |
809 | } |
810 | ||
9e89dde2 ZR |
811 | /* -------------------------------------------------------------------------- |
812 | Driver Management | |
813 | -------------------------------------------------------------------------- */ | |
1da177e4 | 814 | /** |
d758a8fa RD |
815 | * acpi_bus_driver_init - add a device to a driver |
816 | * @device: the device to add and initialize | |
817 | * @driver: driver for the device | |
818 | * | |
0c526d96 | 819 | * Used to initialize a device via its device driver. Called whenever a |
1890a97a | 820 | * driver is bound to a device. Invokes the driver's add() ops. |
1da177e4 LT |
821 | */ |
822 | static int | |
4be44fcd | 823 | acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) |
1da177e4 | 824 | { |
4be44fcd | 825 | int result = 0; |
1da177e4 | 826 | |
1da177e4 | 827 | if (!device || !driver) |
d550d98d | 828 | return -EINVAL; |
1da177e4 LT |
829 | |
830 | if (!driver->ops.add) | |
d550d98d | 831 | return -ENOSYS; |
1da177e4 LT |
832 | |
833 | result = driver->ops.add(device); | |
834 | if (result) { | |
835 | device->driver = NULL; | |
db89b4f0 | 836 | device->driver_data = NULL; |
d550d98d | 837 | return result; |
1da177e4 LT |
838 | } |
839 | ||
840 | device->driver = driver; | |
841 | ||
842 | /* | |
843 | * TBD - Configuration Management: Assign resources to device based | |
844 | * upon possible configuration and currently allocated resources. | |
845 | */ | |
846 | ||
4be44fcd LB |
847 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
848 | "Driver successfully bound to device\n")); | |
d550d98d | 849 | return 0; |
3fb02738 RS |
850 | } |
851 | ||
9e89dde2 ZR |
852 | /** |
853 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
854 | * @driver: driver being registered | |
855 | * | |
856 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
857 | * devices that match the driver's criteria and binds. Returns zero for | |
858 | * success or a negative error status for failure. | |
859 | */ | |
860 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
1da177e4 | 861 | { |
1890a97a | 862 | int ret; |
1da177e4 | 863 | |
9e89dde2 ZR |
864 | if (acpi_disabled) |
865 | return -ENODEV; | |
1890a97a PM |
866 | driver->drv.name = driver->name; |
867 | driver->drv.bus = &acpi_bus_type; | |
868 | driver->drv.owner = driver->owner; | |
1da177e4 | 869 | |
1890a97a PM |
870 | ret = driver_register(&driver->drv); |
871 | return ret; | |
9e89dde2 | 872 | } |
1da177e4 | 873 | |
9e89dde2 ZR |
874 | EXPORT_SYMBOL(acpi_bus_register_driver); |
875 | ||
876 | /** | |
877 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus | |
878 | * @driver: driver to unregister | |
879 | * | |
880 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
881 | * devices that match the driver's criteria and unbinds. | |
882 | */ | |
883 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
884 | { | |
1890a97a | 885 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
886 | } |
887 | ||
888 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
889 | ||
9e89dde2 ZR |
890 | /* -------------------------------------------------------------------------- |
891 | Device Enumeration | |
892 | -------------------------------------------------------------------------- */ | |
5c478f49 BH |
893 | static struct acpi_device *acpi_bus_get_parent(acpi_handle handle) |
894 | { | |
895 | acpi_status status; | |
896 | int ret; | |
897 | struct acpi_device *device; | |
898 | ||
899 | /* | |
900 | * Fixed hardware devices do not appear in the namespace and do not | |
901 | * have handles, but we fabricate acpi_devices for them, so we have | |
902 | * to deal with them specially. | |
903 | */ | |
904 | if (handle == NULL) | |
905 | return acpi_root; | |
906 | ||
907 | do { | |
908 | status = acpi_get_parent(handle, &handle); | |
909 | if (status == AE_NULL_ENTRY) | |
910 | return NULL; | |
911 | if (ACPI_FAILURE(status)) | |
912 | return acpi_root; | |
913 | ||
914 | ret = acpi_bus_get_device(handle, &device); | |
915 | if (ret == 0) | |
916 | return device; | |
917 | } while (1); | |
918 | } | |
919 | ||
9e89dde2 ZR |
920 | acpi_status |
921 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
922 | { | |
923 | acpi_status status; | |
924 | acpi_handle tmp; | |
925 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
926 | union acpi_object *obj; | |
927 | ||
928 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
929 | if (ACPI_FAILURE(status)) | |
930 | return status; | |
931 | ||
932 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
933 | if (ACPI_SUCCESS(status)) { | |
934 | obj = buffer.pointer; | |
3b5fee59 HM |
935 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
936 | ejd); | |
9e89dde2 ZR |
937 | kfree(buffer.pointer); |
938 | } | |
939 | return status; | |
940 | } | |
941 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
942 | ||
8e4319c4 | 943 | void acpi_bus_data_handler(acpi_handle handle, void *context) |
9e89dde2 ZR |
944 | { |
945 | ||
946 | /* TBD */ | |
947 | ||
948 | return; | |
949 | } | |
950 | ||
e88c9c60 RW |
951 | static int acpi_bus_extract_wakeup_device_power_package(acpi_handle handle, |
952 | struct acpi_device_wakeup *wakeup) | |
9e89dde2 | 953 | { |
b581a7f9 RW |
954 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
955 | union acpi_object *package = NULL; | |
9e89dde2 | 956 | union acpi_object *element = NULL; |
b581a7f9 | 957 | acpi_status status; |
e88c9c60 | 958 | int err = -ENODATA; |
9e89dde2 | 959 | |
b581a7f9 | 960 | if (!wakeup) |
e88c9c60 | 961 | return -EINVAL; |
9e89dde2 | 962 | |
993cbe59 | 963 | INIT_LIST_HEAD(&wakeup->resources); |
9e89dde2 | 964 | |
b581a7f9 RW |
965 | /* _PRW */ |
966 | status = acpi_evaluate_object(handle, "_PRW", NULL, &buffer); | |
967 | if (ACPI_FAILURE(status)) { | |
968 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
e88c9c60 | 969 | return err; |
b581a7f9 RW |
970 | } |
971 | ||
972 | package = (union acpi_object *)buffer.pointer; | |
973 | ||
e88c9c60 | 974 | if (!package || package->package.count < 2) |
b581a7f9 | 975 | goto out; |
b581a7f9 | 976 | |
9e89dde2 | 977 | element = &(package->package.elements[0]); |
e88c9c60 | 978 | if (!element) |
b581a7f9 | 979 | goto out; |
e88c9c60 | 980 | |
9e89dde2 ZR |
981 | if (element->type == ACPI_TYPE_PACKAGE) { |
982 | if ((element->package.count < 2) || | |
983 | (element->package.elements[0].type != | |
984 | ACPI_TYPE_LOCAL_REFERENCE) | |
e88c9c60 | 985 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) |
b581a7f9 | 986 | goto out; |
e88c9c60 | 987 | |
b581a7f9 | 988 | wakeup->gpe_device = |
9e89dde2 | 989 | element->package.elements[0].reference.handle; |
b581a7f9 | 990 | wakeup->gpe_number = |
9e89dde2 ZR |
991 | (u32) element->package.elements[1].integer.value; |
992 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
b581a7f9 RW |
993 | wakeup->gpe_device = NULL; |
994 | wakeup->gpe_number = element->integer.value; | |
995 | } else { | |
b581a7f9 RW |
996 | goto out; |
997 | } | |
9e89dde2 ZR |
998 | |
999 | element = &(package->package.elements[1]); | |
e88c9c60 | 1000 | if (element->type != ACPI_TYPE_INTEGER) |
b581a7f9 | 1001 | goto out; |
e88c9c60 | 1002 | |
b581a7f9 | 1003 | wakeup->sleep_state = element->integer.value; |
9e89dde2 | 1004 | |
e88c9c60 RW |
1005 | err = acpi_extract_power_resources(package, 2, &wakeup->resources); |
1006 | if (err) | |
b581a7f9 | 1007 | goto out; |
9e89dde2 | 1008 | |
0596a52b RW |
1009 | if (!list_empty(&wakeup->resources)) { |
1010 | int sleep_state; | |
9e89dde2 | 1011 | |
0596a52b RW |
1012 | sleep_state = acpi_power_min_system_level(&wakeup->resources); |
1013 | if (sleep_state < wakeup->sleep_state) { | |
1014 | acpi_handle_warn(handle, "Overriding _PRW sleep state " | |
1015 | "(S%d) by S%d from power resources\n", | |
1016 | (int)wakeup->sleep_state, sleep_state); | |
1017 | wakeup->sleep_state = sleep_state; | |
1018 | } | |
1019 | } | |
bba63a29 | 1020 | acpi_setup_gpe_for_wake(handle, wakeup->gpe_device, wakeup->gpe_number); |
9874647b | 1021 | |
b581a7f9 RW |
1022 | out: |
1023 | kfree(buffer.pointer); | |
e88c9c60 | 1024 | return err; |
1da177e4 LT |
1025 | } |
1026 | ||
f517709d | 1027 | static void acpi_bus_set_run_wake_flags(struct acpi_device *device) |
1da177e4 | 1028 | { |
29b71a1c | 1029 | struct acpi_device_id button_device_ids[] = { |
29b71a1c | 1030 | {"PNP0C0C", 0}, |
b7e38304 | 1031 | {"PNP0C0D", 0}, |
29b71a1c TR |
1032 | {"PNP0C0E", 0}, |
1033 | {"", 0}, | |
1034 | }; | |
f517709d RW |
1035 | acpi_status status; |
1036 | acpi_event_status event_status; | |
1037 | ||
b67ea761 | 1038 | device->wakeup.flags.notifier_present = 0; |
f517709d RW |
1039 | |
1040 | /* Power button, Lid switch always enable wakeup */ | |
1041 | if (!acpi_match_device_ids(device, button_device_ids)) { | |
1042 | device->wakeup.flags.run_wake = 1; | |
b7e38304 ZR |
1043 | if (!acpi_match_device_ids(device, &button_device_ids[1])) { |
1044 | /* Do not use Lid/sleep button for S5 wakeup */ | |
1045 | if (device->wakeup.sleep_state == ACPI_STATE_S5) | |
1046 | device->wakeup.sleep_state = ACPI_STATE_S4; | |
1047 | } | |
f2b56bc8 | 1048 | device_set_wakeup_capable(&device->dev, true); |
f517709d RW |
1049 | return; |
1050 | } | |
1051 | ||
e8e18c95 RW |
1052 | status = acpi_get_gpe_status(device->wakeup.gpe_device, |
1053 | device->wakeup.gpe_number, | |
1054 | &event_status); | |
f517709d RW |
1055 | if (status == AE_OK) |
1056 | device->wakeup.flags.run_wake = | |
1057 | !!(event_status & ACPI_EVENT_FLAG_HANDLE); | |
1058 | } | |
1059 | ||
d57d09a4 | 1060 | static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
f517709d | 1061 | { |
d57d09a4 | 1062 | acpi_handle temp; |
f517709d | 1063 | acpi_status status = 0; |
e88c9c60 | 1064 | int err; |
29b71a1c | 1065 | |
d57d09a4 RW |
1066 | /* Presence of _PRW indicates wake capable */ |
1067 | status = acpi_get_handle(device->handle, "_PRW", &temp); | |
1068 | if (ACPI_FAILURE(status)) | |
1069 | return; | |
1070 | ||
e88c9c60 RW |
1071 | err = acpi_bus_extract_wakeup_device_power_package(device->handle, |
1072 | &device->wakeup); | |
1073 | if (err) { | |
1074 | dev_err(&device->dev, "_PRW evaluation error: %d\n", err); | |
d57d09a4 | 1075 | return; |
9e89dde2 | 1076 | } |
1da177e4 | 1077 | |
9e89dde2 | 1078 | device->wakeup.flags.valid = 1; |
9b83ccd2 | 1079 | device->wakeup.prepare_count = 0; |
f517709d | 1080 | acpi_bus_set_run_wake_flags(device); |
729b2bdb ZY |
1081 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
1082 | * system for the ACPI device with the _PRW object. | |
1083 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. | |
1084 | * So it is necessary to call _DSW object first. Only when it is not | |
1085 | * present will the _PSW object used. | |
1086 | */ | |
e88c9c60 RW |
1087 | err = acpi_device_sleep_wake(device, 0, 0, 0); |
1088 | if (err) | |
77e76609 RW |
1089 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
1090 | "error in _DSW or _PSW evaluation\n")); | |
1da177e4 | 1091 | } |
1da177e4 | 1092 | |
f33ce568 RW |
1093 | static void acpi_bus_init_power_state(struct acpi_device *device, int state) |
1094 | { | |
1095 | struct acpi_device_power_state *ps = &device->power.states[state]; | |
ef85bdbe RW |
1096 | char pathname[5] = { '_', 'P', 'R', '0' + state, '\0' }; |
1097 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
f33ce568 RW |
1098 | acpi_handle handle; |
1099 | acpi_status status; | |
bf325f95 | 1100 | |
f33ce568 RW |
1101 | INIT_LIST_HEAD(&ps->resources); |
1102 | ||
ef85bdbe RW |
1103 | /* Evaluate "_PRx" to get referenced power resources */ |
1104 | status = acpi_evaluate_object(device->handle, pathname, NULL, &buffer); | |
1105 | if (ACPI_SUCCESS(status)) { | |
1106 | union acpi_object *package = buffer.pointer; | |
1107 | ||
1108 | if (buffer.length && package | |
1109 | && package->type == ACPI_TYPE_PACKAGE | |
1110 | && package->package.count) { | |
e88c9c60 RW |
1111 | int err = acpi_extract_power_resources(package, 0, |
1112 | &ps->resources); | |
1113 | if (!err) | |
ef85bdbe | 1114 | device->power.flags.power_resources = 1; |
f33ce568 | 1115 | } |
ef85bdbe | 1116 | ACPI_FREE(buffer.pointer); |
f33ce568 RW |
1117 | } |
1118 | ||
1119 | /* Evaluate "_PSx" to see if we can do explicit sets */ | |
ef85bdbe RW |
1120 | pathname[2] = 'S'; |
1121 | status = acpi_get_handle(device->handle, pathname, &handle); | |
f33ce568 RW |
1122 | if (ACPI_SUCCESS(status)) |
1123 | ps->flags.explicit_set = 1; | |
1124 | ||
1125 | /* | |
1126 | * State is valid if there are means to put the device into it. | |
1127 | * D3hot is only valid if _PR3 present. | |
1128 | */ | |
ef85bdbe | 1129 | if (!list_empty(&ps->resources) |
f33ce568 RW |
1130 | || (ps->flags.explicit_set && state < ACPI_STATE_D3_HOT)) { |
1131 | ps->flags.valid = 1; | |
1132 | ps->flags.os_accessible = 1; | |
1133 | } | |
1134 | ||
1135 | ps->power = -1; /* Unknown - driver assigned */ | |
1136 | ps->latency = -1; /* Unknown - driver assigned */ | |
1137 | } | |
1138 | ||
d43e167d | 1139 | static void acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 1140 | { |
8bc5053b RW |
1141 | acpi_status status; |
1142 | acpi_handle handle; | |
1143 | u32 i; | |
1a365616 | 1144 | |
d43e167d RW |
1145 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ |
1146 | status = acpi_get_handle(device->handle, "_PS0", &handle); | |
1147 | if (ACPI_FAILURE(status)) { | |
1148 | status = acpi_get_handle(device->handle, "_PR0", &handle); | |
1149 | if (ACPI_FAILURE(status)) | |
1150 | return; | |
1151 | } | |
1152 | ||
1153 | device->flags.power_manageable = 1; | |
4be44fcd | 1154 | |
9e89dde2 ZR |
1155 | /* |
1156 | * Power Management Flags | |
1157 | */ | |
1158 | status = acpi_get_handle(device->handle, "_PSC", &handle); | |
1159 | if (ACPI_SUCCESS(status)) | |
1160 | device->power.flags.explicit_get = 1; | |
1161 | status = acpi_get_handle(device->handle, "_IRC", &handle); | |
1162 | if (ACPI_SUCCESS(status)) | |
1163 | device->power.flags.inrush_current = 1; | |
1da177e4 | 1164 | |
9e89dde2 ZR |
1165 | /* |
1166 | * Enumerate supported power management states | |
1167 | */ | |
f33ce568 RW |
1168 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) |
1169 | acpi_bus_init_power_state(device, i); | |
bf325f95 | 1170 | |
0b224527 | 1171 | INIT_LIST_HEAD(&device->power.states[ACPI_STATE_D3_COLD].resources); |
1da177e4 | 1172 | |
9e89dde2 ZR |
1173 | /* Set defaults for D0 and D3 states (always valid) */ |
1174 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
1175 | device->power.states[ACPI_STATE_D0].power = 100; | |
1176 | device->power.states[ACPI_STATE_D3].flags.valid = 1; | |
1177 | device->power.states[ACPI_STATE_D3].power = 0; | |
c8f7a62c | 1178 | |
5c7dd710 RW |
1179 | /* Set D3cold's explicit_set flag if _PS3 exists. */ |
1180 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set) | |
1181 | device->power.states[ACPI_STATE_D3_COLD].flags.explicit_set = 1; | |
1182 | ||
1399dfcd AL |
1183 | /* Presence of _PS3 or _PRx means we can put the device into D3 cold */ |
1184 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set || | |
1185 | device->power.flags.power_resources) | |
1186 | device->power.states[ACPI_STATE_D3_COLD].flags.os_accessible = 1; | |
1187 | ||
ade3e7fe | 1188 | acpi_bus_init_power(device); |
9e89dde2 | 1189 | } |
c8f7a62c | 1190 | |
d43e167d | 1191 | static void acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 1192 | { |
4be44fcd LB |
1193 | acpi_status status = AE_OK; |
1194 | acpi_handle temp = NULL; | |
1da177e4 | 1195 | |
1da177e4 LT |
1196 | /* Presence of _STA indicates 'dynamic_status' */ |
1197 | status = acpi_get_handle(device->handle, "_STA", &temp); | |
1198 | if (ACPI_SUCCESS(status)) | |
1199 | device->flags.dynamic_status = 1; | |
1200 | ||
1da177e4 LT |
1201 | /* Presence of _RMV indicates 'removable' */ |
1202 | status = acpi_get_handle(device->handle, "_RMV", &temp); | |
1203 | if (ACPI_SUCCESS(status)) | |
1204 | device->flags.removable = 1; | |
1205 | ||
1206 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
1207 | status = acpi_get_handle(device->handle, "_EJD", &temp); | |
1208 | if (ACPI_SUCCESS(status)) | |
1209 | device->flags.ejectable = 1; | |
1210 | else { | |
1211 | status = acpi_get_handle(device->handle, "_EJ0", &temp); | |
1212 | if (ACPI_SUCCESS(status)) | |
1213 | device->flags.ejectable = 1; | |
1214 | } | |
1da177e4 LT |
1215 | } |
1216 | ||
c7bcb4e9 | 1217 | static void acpi_device_get_busid(struct acpi_device *device) |
1da177e4 | 1218 | { |
4be44fcd LB |
1219 | char bus_id[5] = { '?', 0 }; |
1220 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
1221 | int i = 0; | |
1da177e4 LT |
1222 | |
1223 | /* | |
1224 | * Bus ID | |
1225 | * ------ | |
1226 | * The device's Bus ID is simply the object name. | |
1227 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
1228 | */ | |
859ac9a4 | 1229 | if (ACPI_IS_ROOT_DEVICE(device)) { |
1da177e4 | 1230 | strcpy(device->pnp.bus_id, "ACPI"); |
859ac9a4 BH |
1231 | return; |
1232 | } | |
1233 | ||
1234 | switch (device->device_type) { | |
1da177e4 LT |
1235 | case ACPI_BUS_TYPE_POWER_BUTTON: |
1236 | strcpy(device->pnp.bus_id, "PWRF"); | |
1237 | break; | |
1238 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
1239 | strcpy(device->pnp.bus_id, "SLPF"); | |
1240 | break; | |
1241 | default: | |
66b7ed40 | 1242 | acpi_get_name(device->handle, ACPI_SINGLE_NAME, &buffer); |
1da177e4 LT |
1243 | /* Clean up trailing underscores (if any) */ |
1244 | for (i = 3; i > 1; i--) { | |
1245 | if (bus_id[i] == '_') | |
1246 | bus_id[i] = '\0'; | |
1247 | else | |
1248 | break; | |
1249 | } | |
1250 | strcpy(device->pnp.bus_id, bus_id); | |
1251 | break; | |
1252 | } | |
1253 | } | |
1254 | ||
54735266 ZR |
1255 | /* |
1256 | * acpi_bay_match - see if a device is an ejectable driver bay | |
1257 | * | |
1258 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
1259 | * then we can safely call it an ejectable drive bay | |
1260 | */ | |
1261 | static int acpi_bay_match(struct acpi_device *device){ | |
1262 | acpi_status status; | |
1263 | acpi_handle handle; | |
1264 | acpi_handle tmp; | |
1265 | acpi_handle phandle; | |
1266 | ||
1267 | handle = device->handle; | |
1268 | ||
1269 | status = acpi_get_handle(handle, "_EJ0", &tmp); | |
1270 | if (ACPI_FAILURE(status)) | |
1271 | return -ENODEV; | |
1272 | ||
1273 | if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || | |
1274 | (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || | |
1275 | (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || | |
1276 | (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) | |
1277 | return 0; | |
1278 | ||
1279 | if (acpi_get_parent(handle, &phandle)) | |
1280 | return -ENODEV; | |
1281 | ||
1282 | if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) || | |
1283 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) || | |
1284 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) || | |
1285 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp)))) | |
1286 | return 0; | |
1287 | ||
1288 | return -ENODEV; | |
1289 | } | |
1290 | ||
3620f2f2 FS |
1291 | /* |
1292 | * acpi_dock_match - see if a device has a _DCK method | |
1293 | */ | |
1294 | static int acpi_dock_match(struct acpi_device *device) | |
1295 | { | |
1296 | acpi_handle tmp; | |
1297 | return acpi_get_handle(device->handle, "_DCK", &tmp); | |
1298 | } | |
1299 | ||
620e112c | 1300 | const char *acpi_device_hid(struct acpi_device *device) |
15b8dd53 | 1301 | { |
7f47fa6c | 1302 | struct acpi_hardware_id *hid; |
15b8dd53 | 1303 | |
2b2ae7c7 TR |
1304 | if (list_empty(&device->pnp.ids)) |
1305 | return dummy_hid; | |
1306 | ||
7f47fa6c BH |
1307 | hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list); |
1308 | return hid->id; | |
1309 | } | |
1310 | EXPORT_SYMBOL(acpi_device_hid); | |
15b8dd53 | 1311 | |
7f47fa6c BH |
1312 | static void acpi_add_id(struct acpi_device *device, const char *dev_id) |
1313 | { | |
1314 | struct acpi_hardware_id *id; | |
15b8dd53 | 1315 | |
7f47fa6c BH |
1316 | id = kmalloc(sizeof(*id), GFP_KERNEL); |
1317 | if (!id) | |
1318 | return; | |
15b8dd53 | 1319 | |
581de59e | 1320 | id->id = kstrdup(dev_id, GFP_KERNEL); |
7f47fa6c BH |
1321 | if (!id->id) { |
1322 | kfree(id); | |
1323 | return; | |
15b8dd53 BM |
1324 | } |
1325 | ||
7f47fa6c | 1326 | list_add_tail(&id->list, &device->pnp.ids); |
15b8dd53 BM |
1327 | } |
1328 | ||
222e82ac DW |
1329 | /* |
1330 | * Old IBM workstations have a DSDT bug wherein the SMBus object | |
1331 | * lacks the SMBUS01 HID and the methods do not have the necessary "_" | |
1332 | * prefix. Work around this. | |
1333 | */ | |
1334 | static int acpi_ibm_smbus_match(struct acpi_device *device) | |
1335 | { | |
1336 | acpi_handle h_dummy; | |
1337 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
1338 | int result; | |
1339 | ||
1340 | if (!dmi_name_in_vendors("IBM")) | |
1341 | return -ENODEV; | |
1342 | ||
1343 | /* Look for SMBS object */ | |
1344 | result = acpi_get_name(device->handle, ACPI_SINGLE_NAME, &path); | |
1345 | if (result) | |
1346 | return result; | |
1347 | ||
1348 | if (strcmp("SMBS", path.pointer)) { | |
1349 | result = -ENODEV; | |
1350 | goto out; | |
1351 | } | |
1352 | ||
1353 | /* Does it have the necessary (but misnamed) methods? */ | |
1354 | result = -ENODEV; | |
1355 | if (ACPI_SUCCESS(acpi_get_handle(device->handle, "SBI", &h_dummy)) && | |
1356 | ACPI_SUCCESS(acpi_get_handle(device->handle, "SBR", &h_dummy)) && | |
1357 | ACPI_SUCCESS(acpi_get_handle(device->handle, "SBW", &h_dummy))) | |
1358 | result = 0; | |
1359 | out: | |
1360 | kfree(path.pointer); | |
1361 | return result; | |
1362 | } | |
1363 | ||
c7bcb4e9 | 1364 | static void acpi_device_set_id(struct acpi_device *device) |
1da177e4 | 1365 | { |
4be44fcd | 1366 | acpi_status status; |
57f3674f | 1367 | struct acpi_device_info *info; |
78e25fef | 1368 | struct acpi_pnp_device_id_list *cid_list; |
7f47fa6c | 1369 | int i; |
1da177e4 | 1370 | |
c7bcb4e9 | 1371 | switch (device->device_type) { |
1da177e4 | 1372 | case ACPI_BUS_TYPE_DEVICE: |
859ac9a4 | 1373 | if (ACPI_IS_ROOT_DEVICE(device)) { |
57f3674f | 1374 | acpi_add_id(device, ACPI_SYSTEM_HID); |
859ac9a4 BH |
1375 | break; |
1376 | } | |
1377 | ||
66b7ed40 | 1378 | status = acpi_get_object_info(device->handle, &info); |
1da177e4 | 1379 | if (ACPI_FAILURE(status)) { |
96b2dd1f | 1380 | printk(KERN_ERR PREFIX "%s: Error reading device info\n", __func__); |
1da177e4 LT |
1381 | return; |
1382 | } | |
1383 | ||
1da177e4 | 1384 | if (info->valid & ACPI_VALID_HID) |
57f3674f BH |
1385 | acpi_add_id(device, info->hardware_id.string); |
1386 | if (info->valid & ACPI_VALID_CID) { | |
15b8dd53 | 1387 | cid_list = &info->compatible_id_list; |
57f3674f BH |
1388 | for (i = 0; i < cid_list->count; i++) |
1389 | acpi_add_id(device, cid_list->ids[i].string); | |
1390 | } | |
1da177e4 LT |
1391 | if (info->valid & ACPI_VALID_ADR) { |
1392 | device->pnp.bus_address = info->address; | |
1393 | device->flags.bus_address = 1; | |
1394 | } | |
ccf78040 LZ |
1395 | if (info->valid & ACPI_VALID_UID) |
1396 | device->pnp.unique_id = kstrdup(info->unique_id.string, | |
1397 | GFP_KERNEL); | |
ae843332 | 1398 | |
a83893ae BH |
1399 | kfree(info); |
1400 | ||
57f3674f BH |
1401 | /* |
1402 | * Some devices don't reliably have _HIDs & _CIDs, so add | |
1403 | * synthetic HIDs to make sure drivers can find them. | |
1404 | */ | |
c3d6de69 | 1405 | if (acpi_is_video_device(device)) |
57f3674f | 1406 | acpi_add_id(device, ACPI_VIDEO_HID); |
3620f2f2 | 1407 | else if (ACPI_SUCCESS(acpi_bay_match(device))) |
57f3674f | 1408 | acpi_add_id(device, ACPI_BAY_HID); |
3620f2f2 | 1409 | else if (ACPI_SUCCESS(acpi_dock_match(device))) |
57f3674f | 1410 | acpi_add_id(device, ACPI_DOCK_HID); |
222e82ac DW |
1411 | else if (!acpi_ibm_smbus_match(device)) |
1412 | acpi_add_id(device, ACPI_SMBUS_IBM_HID); | |
4f5f64cf | 1413 | else if (list_empty(&device->pnp.ids) && |
b7b30de5 BH |
1414 | ACPI_IS_ROOT_DEVICE(device->parent)) { |
1415 | acpi_add_id(device, ACPI_BUS_HID); /* \_SB, LNXSYBUS */ | |
1416 | strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME); | |
1417 | strcpy(device->pnp.device_class, ACPI_BUS_CLASS); | |
1418 | } | |
54735266 | 1419 | |
1da177e4 LT |
1420 | break; |
1421 | case ACPI_BUS_TYPE_POWER: | |
57f3674f | 1422 | acpi_add_id(device, ACPI_POWER_HID); |
1da177e4 LT |
1423 | break; |
1424 | case ACPI_BUS_TYPE_PROCESSOR: | |
57f3674f | 1425 | acpi_add_id(device, ACPI_PROCESSOR_OBJECT_HID); |
1da177e4 | 1426 | break; |
1da177e4 | 1427 | case ACPI_BUS_TYPE_THERMAL: |
57f3674f | 1428 | acpi_add_id(device, ACPI_THERMAL_HID); |
1da177e4 LT |
1429 | break; |
1430 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
57f3674f | 1431 | acpi_add_id(device, ACPI_BUTTON_HID_POWERF); |
1da177e4 LT |
1432 | break; |
1433 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
57f3674f | 1434 | acpi_add_id(device, ACPI_BUTTON_HID_SLEEPF); |
1da177e4 LT |
1435 | break; |
1436 | } | |
1da177e4 LT |
1437 | } |
1438 | ||
82c7d5ef RW |
1439 | void acpi_init_device_object(struct acpi_device *device, acpi_handle handle, |
1440 | int type, unsigned long long sta) | |
1da177e4 | 1441 | { |
d43e167d RW |
1442 | INIT_LIST_HEAD(&device->pnp.ids); |
1443 | device->device_type = type; | |
1444 | device->handle = handle; | |
1445 | device->parent = acpi_bus_get_parent(handle); | |
1446 | STRUCT_TO_INT(device->status) = sta; | |
1447 | acpi_device_get_busid(device); | |
1448 | acpi_device_set_id(device); | |
1449 | acpi_bus_get_flags(device); | |
2c0d4fe0 | 1450 | device->flags.match_driver = false; |
cf860be6 RW |
1451 | device_initialize(&device->dev); |
1452 | dev_set_uevent_suppress(&device->dev, true); | |
1453 | } | |
bc3b0772 | 1454 | |
cf860be6 RW |
1455 | void acpi_device_add_finalize(struct acpi_device *device) |
1456 | { | |
2c0d4fe0 | 1457 | device->flags.match_driver = true; |
cf860be6 RW |
1458 | dev_set_uevent_suppress(&device->dev, false); |
1459 | kobject_uevent(&device->dev.kobj, KOBJ_ADD); | |
1da177e4 LT |
1460 | } |
1461 | ||
5c478f49 BH |
1462 | static int acpi_add_single_object(struct acpi_device **child, |
1463 | acpi_handle handle, int type, | |
2c0d4fe0 | 1464 | unsigned long long sta) |
1da177e4 | 1465 | { |
77c24888 BH |
1466 | int result; |
1467 | struct acpi_device *device; | |
29aaefa6 | 1468 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 1469 | |
36bcbec7 | 1470 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 1471 | if (!device) { |
6468463a | 1472 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 1473 | return -ENOMEM; |
1da177e4 | 1474 | } |
1da177e4 | 1475 | |
d43e167d RW |
1476 | acpi_init_device_object(device, handle, type, sta); |
1477 | acpi_bus_get_power_flags(device); | |
d57d09a4 | 1478 | acpi_bus_get_wakeup_device_flags(device); |
1da177e4 | 1479 | |
cf860be6 | 1480 | result = acpi_device_add(device, acpi_device_release); |
d43e167d | 1481 | if (result) { |
718fb0de | 1482 | acpi_device_release(&device->dev); |
d43e167d RW |
1483 | return result; |
1484 | } | |
1da177e4 | 1485 | |
d43e167d | 1486 | acpi_power_add_remove_device(device, true); |
cf860be6 | 1487 | acpi_device_add_finalize(device); |
d43e167d RW |
1488 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); |
1489 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Added %s [%s] parent %s\n", | |
1490 | dev_name(&device->dev), (char *) buffer.pointer, | |
1491 | device->parent ? dev_name(&device->parent->dev) : "(null)")); | |
1492 | kfree(buffer.pointer); | |
1493 | *child = device; | |
1494 | return 0; | |
bf325f95 RW |
1495 | } |
1496 | ||
778cbc1d BH |
1497 | static int acpi_bus_type_and_status(acpi_handle handle, int *type, |
1498 | unsigned long long *sta) | |
1da177e4 | 1499 | { |
778cbc1d BH |
1500 | acpi_status status; |
1501 | acpi_object_type acpi_type; | |
1da177e4 | 1502 | |
778cbc1d | 1503 | status = acpi_get_type(handle, &acpi_type); |
51a85faf | 1504 | if (ACPI_FAILURE(status)) |
778cbc1d | 1505 | return -ENODEV; |
4be44fcd | 1506 | |
778cbc1d | 1507 | switch (acpi_type) { |
51a85faf BH |
1508 | case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */ |
1509 | case ACPI_TYPE_DEVICE: | |
778cbc1d BH |
1510 | *type = ACPI_BUS_TYPE_DEVICE; |
1511 | status = acpi_bus_get_status_handle(handle, sta); | |
1512 | if (ACPI_FAILURE(status)) | |
1513 | return -ENODEV; | |
51a85faf BH |
1514 | break; |
1515 | case ACPI_TYPE_PROCESSOR: | |
778cbc1d BH |
1516 | *type = ACPI_BUS_TYPE_PROCESSOR; |
1517 | status = acpi_bus_get_status_handle(handle, sta); | |
1518 | if (ACPI_FAILURE(status)) | |
1519 | return -ENODEV; | |
51a85faf BH |
1520 | break; |
1521 | case ACPI_TYPE_THERMAL: | |
778cbc1d BH |
1522 | *type = ACPI_BUS_TYPE_THERMAL; |
1523 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1524 | break; |
1525 | case ACPI_TYPE_POWER: | |
778cbc1d BH |
1526 | *type = ACPI_BUS_TYPE_POWER; |
1527 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1528 | break; |
1529 | default: | |
778cbc1d | 1530 | return -ENODEV; |
51a85faf | 1531 | } |
1da177e4 | 1532 | |
778cbc1d BH |
1533 | return 0; |
1534 | } | |
1535 | ||
e3863094 RW |
1536 | static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used, |
1537 | void *not_used, void **return_value) | |
778cbc1d | 1538 | { |
805d410f | 1539 | struct acpi_device *device = NULL; |
778cbc1d BH |
1540 | int type; |
1541 | unsigned long long sta; | |
e3b87f8a | 1542 | acpi_status status; |
778cbc1d BH |
1543 | int result; |
1544 | ||
4002bf38 RW |
1545 | acpi_bus_get_device(handle, &device); |
1546 | if (device) | |
1547 | goto out; | |
1548 | ||
778cbc1d BH |
1549 | result = acpi_bus_type_and_status(handle, &type, &sta); |
1550 | if (result) | |
1551 | return AE_OK; | |
1552 | ||
82c7d5ef RW |
1553 | if (type == ACPI_BUS_TYPE_POWER) { |
1554 | acpi_add_power_resource(handle); | |
1555 | return AE_OK; | |
1556 | } | |
1557 | ||
778cbc1d | 1558 | if (!(sta & ACPI_STA_DEVICE_PRESENT) && |
b581a7f9 | 1559 | !(sta & ACPI_STA_DEVICE_FUNCTIONING)) { |
86e4e20e RW |
1560 | struct acpi_device_wakeup wakeup; |
1561 | acpi_handle temp; | |
1562 | ||
1563 | status = acpi_get_handle(handle, "_PRW", &temp); | |
993cbe59 | 1564 | if (ACPI_SUCCESS(status)) { |
86e4e20e RW |
1565 | acpi_bus_extract_wakeup_device_power_package(handle, |
1566 | &wakeup); | |
993cbe59 RW |
1567 | acpi_power_resources_list_free(&wakeup.resources); |
1568 | } | |
778cbc1d | 1569 | return AE_CTRL_DEPTH; |
b581a7f9 | 1570 | } |
778cbc1d | 1571 | |
2c0d4fe0 | 1572 | acpi_add_single_object(&device, handle, type, sta); |
e3b87f8a | 1573 | if (!device) |
51a85faf | 1574 | return AE_CTRL_DEPTH; |
1da177e4 | 1575 | |
4002bf38 | 1576 | out: |
51a85faf BH |
1577 | if (!*return_value) |
1578 | *return_value = device; | |
805d410f | 1579 | |
51a85faf BH |
1580 | return AE_OK; |
1581 | } | |
3fb02738 | 1582 | |
ca589f94 RW |
1583 | static int acpi_scan_attach_handler(struct acpi_device *device) |
1584 | { | |
1585 | struct acpi_scan_handler *handler; | |
1586 | int ret = 0; | |
1587 | ||
1588 | list_for_each_entry(handler, &acpi_scan_handlers_list, list_node) { | |
1589 | const struct acpi_device_id *id; | |
1590 | ||
1591 | id = __acpi_match_device(device, handler->ids); | |
1592 | if (!id) | |
1593 | continue; | |
1594 | ||
1595 | ret = handler->attach(device, id); | |
1596 | if (ret > 0) { | |
1597 | device->handler = handler; | |
1598 | break; | |
1599 | } else if (ret < 0) { | |
1600 | break; | |
1601 | } | |
1602 | } | |
1603 | return ret; | |
1604 | } | |
1605 | ||
0fc300b0 RW |
1606 | static acpi_status acpi_bus_device_attach(acpi_handle handle, u32 lvl_not_used, |
1607 | void *not_used, void **ret_not_used) | |
51a85faf | 1608 | { |
e375325c | 1609 | const struct acpi_device_id *id; |
805d410f RW |
1610 | struct acpi_device *device; |
1611 | unsigned long long sta_not_used; | |
ca589f94 | 1612 | int ret; |
3fb02738 | 1613 | |
805d410f RW |
1614 | /* |
1615 | * Ignore errors ignored by acpi_bus_check_add() to avoid terminating | |
1616 | * namespace walks prematurely. | |
1617 | */ | |
ca589f94 | 1618 | if (acpi_bus_type_and_status(handle, &ret, &sta_not_used)) |
805d410f | 1619 | return AE_OK; |
1da177e4 | 1620 | |
805d410f RW |
1621 | if (acpi_bus_get_device(handle, &device)) |
1622 | return AE_CTRL_DEPTH; | |
7779688f | 1623 | |
e375325c MW |
1624 | id = __acpi_match_device(device, acpi_platform_device_ids); |
1625 | if (id) { | |
0fc300b0 | 1626 | /* This is a known good platform device. */ |
e375325c | 1627 | acpi_create_platform_device(device, id->driver_data); |
ca589f94 | 1628 | return AE_OK; |
805d410f | 1629 | } |
ca589f94 RW |
1630 | |
1631 | ret = acpi_scan_attach_handler(device); | |
1632 | if (ret) | |
1633 | return ret > 0 ? AE_OK : AE_CTRL_DEPTH; | |
1634 | ||
1635 | ret = device_attach(&device->dev); | |
1636 | return ret >= 0 ? AE_OK : AE_CTRL_DEPTH; | |
1da177e4 | 1637 | } |
1da177e4 | 1638 | |
636458de | 1639 | /** |
b8bd759a | 1640 | * acpi_bus_scan - Add ACPI device node objects in a given namespace scope. |
636458de | 1641 | * @handle: Root of the namespace scope to scan. |
7779688f | 1642 | * |
636458de RW |
1643 | * Scan a given ACPI tree (probably recently hot-plugged) and create and add |
1644 | * found devices. | |
7779688f | 1645 | * |
636458de RW |
1646 | * If no devices were found, -ENODEV is returned, but it does not mean that |
1647 | * there has been a real error. There just have been no suitable ACPI objects | |
1648 | * in the table trunk from which the kernel could create a device and add an | |
1649 | * appropriate driver. | |
7779688f | 1650 | */ |
b8bd759a | 1651 | int acpi_bus_scan(acpi_handle handle) |
3fb02738 | 1652 | { |
b8bd759a | 1653 | void *device = NULL; |
c511cc19 RW |
1654 | int error = 0; |
1655 | ||
1656 | mutex_lock(&acpi_scan_lock); | |
3fb02738 | 1657 | |
b8bd759a RW |
1658 | if (ACPI_SUCCESS(acpi_bus_check_add(handle, 0, NULL, &device))) |
1659 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
1660 | acpi_bus_check_add, NULL, NULL, &device); | |
3fb02738 | 1661 | |
d2f6650a | 1662 | if (!device) |
c511cc19 RW |
1663 | error = -ENODEV; |
1664 | else if (ACPI_SUCCESS(acpi_bus_device_attach(handle, 0, NULL, NULL))) | |
b8bd759a RW |
1665 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
1666 | acpi_bus_device_attach, NULL, NULL, NULL); | |
a2100801 | 1667 | |
c511cc19 RW |
1668 | mutex_unlock(&acpi_scan_lock); |
1669 | return error; | |
3fb02738 | 1670 | } |
b8bd759a | 1671 | EXPORT_SYMBOL(acpi_bus_scan); |
1da177e4 | 1672 | |
05404d8f RW |
1673 | static acpi_status acpi_bus_device_detach(acpi_handle handle, u32 lvl_not_used, |
1674 | void *not_used, void **ret_not_used) | |
1da177e4 | 1675 | { |
05404d8f | 1676 | struct acpi_device *device = NULL; |
4be44fcd | 1677 | |
05404d8f | 1678 | if (!acpi_bus_get_device(handle, &device)) { |
ca589f94 RW |
1679 | struct acpi_scan_handler *dev_handler = device->handler; |
1680 | ||
05404d8f | 1681 | device->removal_type = ACPI_BUS_REMOVAL_EJECT; |
ca589f94 RW |
1682 | if (dev_handler) { |
1683 | if (dev_handler->detach) | |
1684 | dev_handler->detach(device); | |
1685 | ||
1686 | device->handler = NULL; | |
1687 | } else { | |
1688 | device_release_driver(&device->dev); | |
1689 | } | |
05404d8f RW |
1690 | } |
1691 | return AE_OK; | |
1692 | } | |
1da177e4 | 1693 | |
05404d8f RW |
1694 | static acpi_status acpi_bus_remove(acpi_handle handle, u32 lvl_not_used, |
1695 | void *not_used, void **ret_not_used) | |
1696 | { | |
1697 | struct acpi_device *device = NULL; | |
1da177e4 | 1698 | |
05404d8f RW |
1699 | if (!acpi_bus_get_device(handle, &device)) |
1700 | acpi_device_unregister(device); | |
1da177e4 | 1701 | |
05404d8f RW |
1702 | return AE_OK; |
1703 | } | |
1da177e4 | 1704 | |
bfee26db | 1705 | void acpi_bus_trim(struct acpi_device *start) |
1da177e4 | 1706 | { |
c511cc19 RW |
1707 | mutex_lock(&acpi_scan_lock); |
1708 | ||
05404d8f RW |
1709 | /* |
1710 | * Execute acpi_bus_device_detach() as a post-order callback to detach | |
1711 | * all ACPI drivers from the device nodes being removed. | |
1712 | */ | |
1713 | acpi_walk_namespace(ACPI_TYPE_ANY, start->handle, ACPI_UINT32_MAX, NULL, | |
1714 | acpi_bus_device_detach, NULL, NULL); | |
1715 | acpi_bus_device_detach(start->handle, 0, NULL, NULL); | |
cecdb193 RW |
1716 | /* |
1717 | * Execute acpi_bus_remove() as a post-order callback to remove device | |
1718 | * nodes in the given namespace scope. | |
1719 | */ | |
1720 | acpi_walk_namespace(ACPI_TYPE_ANY, start->handle, ACPI_UINT32_MAX, NULL, | |
1721 | acpi_bus_remove, NULL, NULL); | |
1722 | acpi_bus_remove(start->handle, 0, NULL, NULL); | |
c511cc19 RW |
1723 | |
1724 | mutex_unlock(&acpi_scan_lock); | |
1da177e4 | 1725 | } |
ceaba663 KA |
1726 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
1727 | ||
e8b945c9 | 1728 | static int acpi_bus_scan_fixed(void) |
1da177e4 | 1729 | { |
4be44fcd | 1730 | int result = 0; |
c4168bff | 1731 | |
1da177e4 LT |
1732 | /* |
1733 | * Enumerate all fixed-feature devices. | |
1734 | */ | |
2c0d4fe0 RW |
1735 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON)) { |
1736 | struct acpi_device *device = NULL; | |
1737 | ||
5c478f49 | 1738 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1739 | ACPI_BUS_TYPE_POWER_BUTTON, |
2c0d4fe0 RW |
1740 | ACPI_STA_DEFAULT); |
1741 | if (result) | |
1742 | return result; | |
1743 | ||
1744 | result = device_attach(&device->dev); | |
1745 | if (result < 0) | |
1746 | return result; | |
1747 | ||
c10d7a13 | 1748 | device_init_wakeup(&device->dev, true); |
3fb02738 | 1749 | } |
1da177e4 | 1750 | |
2c0d4fe0 RW |
1751 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON)) { |
1752 | struct acpi_device *device = NULL; | |
1753 | ||
5c478f49 | 1754 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1755 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
2c0d4fe0 RW |
1756 | ACPI_STA_DEFAULT); |
1757 | if (result) | |
1758 | return result; | |
1759 | ||
1760 | result = device_attach(&device->dev); | |
3fb02738 | 1761 | } |
1da177e4 | 1762 | |
2c0d4fe0 | 1763 | return result < 0 ? result : 0; |
1da177e4 LT |
1764 | } |
1765 | ||
e747f274 | 1766 | int __init acpi_scan_init(void) |
1da177e4 LT |
1767 | { |
1768 | int result; | |
1da177e4 | 1769 | |
5b327265 PM |
1770 | result = bus_register(&acpi_bus_type); |
1771 | if (result) { | |
1772 | /* We don't want to quit even if we failed to add suspend/resume */ | |
1773 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
1774 | } | |
1775 | ||
92ef2a25 | 1776 | acpi_pci_root_init(); |
13176bbf | 1777 | acpi_csrt_init(); |
97d9a9e9 | 1778 | |
1da177e4 LT |
1779 | /* |
1780 | * Enumerate devices in the ACPI namespace. | |
1781 | */ | |
0cd6ac52 RW |
1782 | result = acpi_bus_scan(ACPI_ROOT_OBJECT); |
1783 | if (result) | |
1784 | return result; | |
1da177e4 | 1785 | |
0cd6ac52 | 1786 | result = acpi_bus_get_device(ACPI_ROOT_OBJECT, &acpi_root); |
1da177e4 | 1787 | if (result) |
b8bd759a | 1788 | return result; |
1da177e4 | 1789 | |
b8bd759a RW |
1790 | result = acpi_bus_scan_fixed(); |
1791 | if (result) { | |
b17b537a | 1792 | acpi_device_unregister(acpi_root); |
b8bd759a RW |
1793 | return result; |
1794 | } | |
1da177e4 | 1795 | |
b8bd759a RW |
1796 | acpi_update_all_gpes(); |
1797 | return 0; | |
1da177e4 | 1798 | } |