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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * scan.c - support for transforming the ACPI namespace into individual objects | |
3 | */ | |
4 | ||
5 | #include <linux/module.h> | |
6 | #include <linux/init.h> | |
5a0e3ad6 | 7 | #include <linux/slab.h> |
9b6d97b6 | 8 | #include <linux/kernel.h> |
1da177e4 | 9 | #include <linux/acpi.h> |
74523c90 AK |
10 | #include <linux/signal.h> |
11 | #include <linux/kthread.h> | |
222e82ac | 12 | #include <linux/dmi.h> |
d1efe3c3 | 13 | #include <linux/nls.h> |
1da177e4 LT |
14 | |
15 | #include <acpi/acpi_drivers.h> | |
1da177e4 | 16 | |
e60cc7a6 BH |
17 | #include "internal.h" |
18 | ||
1da177e4 | 19 | #define _COMPONENT ACPI_BUS_COMPONENT |
f52fd66d | 20 | ACPI_MODULE_NAME("scan"); |
1da177e4 | 21 | #define STRUCT_TO_INT(s) (*((int*)&s)) |
4be44fcd | 22 | extern struct acpi_device *acpi_root; |
1da177e4 LT |
23 | |
24 | #define ACPI_BUS_CLASS "system_bus" | |
29b71a1c | 25 | #define ACPI_BUS_HID "LNXSYBUS" |
1da177e4 LT |
26 | #define ACPI_BUS_DEVICE_NAME "System Bus" |
27 | ||
859ac9a4 BH |
28 | #define ACPI_IS_ROOT_DEVICE(device) (!(device)->parent) |
29 | ||
620e112c | 30 | static const char *dummy_hid = "device"; |
2b2ae7c7 | 31 | |
91e56878 MW |
32 | /* |
33 | * The following ACPI IDs are known to be suitable for representing as | |
34 | * platform devices. | |
35 | */ | |
36 | static const struct acpi_device_id acpi_platform_device_ids[] = { | |
37 | ||
142b007b AH |
38 | { "PNP0D40" }, |
39 | ||
5e7779f0 MW |
40 | /* Haswell LPSS devices */ |
41 | { "INT33C0", 0 }, | |
42 | { "INT33C1", 0 }, | |
43 | { "INT33C2", 0 }, | |
44 | { "INT33C3", 0 }, | |
45 | { "INT33C4", 0 }, | |
46 | { "INT33C5", 0 }, | |
47 | { "INT33C6", 0 }, | |
48 | { "INT33C7", 0 }, | |
49 | ||
91e56878 MW |
50 | { } |
51 | }; | |
52 | ||
1da177e4 | 53 | static LIST_HEAD(acpi_device_list); |
e49bd2dd | 54 | static LIST_HEAD(acpi_bus_id_list); |
9090589d | 55 | DEFINE_MUTEX(acpi_device_lock); |
1da177e4 LT |
56 | LIST_HEAD(acpi_wakeup_device_list); |
57 | ||
e49bd2dd | 58 | struct acpi_device_bus_id{ |
bb095854 | 59 | char bus_id[15]; |
e49bd2dd ZR |
60 | unsigned int instance_no; |
61 | struct list_head node; | |
1da177e4 | 62 | }; |
29b71a1c TR |
63 | |
64 | /* | |
65 | * Creates hid/cid(s) string needed for modalias and uevent | |
66 | * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: | |
67 | * char *modalias: "acpi:IBM0001:ACPI0001" | |
68 | */ | |
b3e572d2 AB |
69 | static int create_modalias(struct acpi_device *acpi_dev, char *modalias, |
70 | int size) | |
71 | { | |
29b71a1c | 72 | int len; |
5c9fcb5d | 73 | int count; |
7f47fa6c | 74 | struct acpi_hardware_id *id; |
29b71a1c | 75 | |
2b2ae7c7 TR |
76 | if (list_empty(&acpi_dev->pnp.ids)) |
77 | return 0; | |
78 | ||
5c9fcb5d | 79 | len = snprintf(modalias, size, "acpi:"); |
29b71a1c TR |
80 | size -= len; |
81 | ||
7f47fa6c BH |
82 | list_for_each_entry(id, &acpi_dev->pnp.ids, list) { |
83 | count = snprintf(&modalias[len], size, "%s:", id->id); | |
5c9fcb5d ZR |
84 | if (count < 0 || count >= size) |
85 | return -EINVAL; | |
86 | len += count; | |
87 | size -= count; | |
88 | } | |
89 | ||
29b71a1c TR |
90 | modalias[len] = '\0'; |
91 | return len; | |
92 | } | |
93 | ||
94 | static ssize_t | |
95 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
96 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
97 | int len; | |
98 | ||
99 | /* Device has no HID and no CID or string is >1024 */ | |
100 | len = create_modalias(acpi_dev, buf, 1024); | |
101 | if (len <= 0) | |
102 | return 0; | |
103 | buf[len++] = '\n'; | |
104 | return len; | |
105 | } | |
106 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); | |
107 | ||
c4753e57 TK |
108 | /** |
109 | * acpi_bus_hot_remove_device: hot-remove a device and its children | |
110 | * @context: struct acpi_eject_event pointer (freed in this func) | |
111 | * | |
112 | * Hot-remove a device and its children. This function frees up the | |
113 | * memory space passed by arg context, so that the caller may call | |
114 | * this function asynchronously through acpi_os_hotplug_execute(). | |
115 | */ | |
116 | void acpi_bus_hot_remove_device(void *context) | |
1da177e4 | 117 | { |
c4753e57 | 118 | struct acpi_eject_event *ej_event = (struct acpi_eject_event *) context; |
26d46867 | 119 | struct acpi_device *device; |
c4753e57 | 120 | acpi_handle handle = ej_event->handle; |
b3c450c3 | 121 | acpi_handle temp; |
1da177e4 LT |
122 | struct acpi_object_list arg_list; |
123 | union acpi_object arg; | |
124 | acpi_status status = AE_OK; | |
c4753e57 | 125 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; /* default */ |
1da177e4 | 126 | |
26d46867 | 127 | if (acpi_bus_get_device(handle, &device)) |
c4753e57 | 128 | goto err_out; |
26d46867 ZR |
129 | |
130 | if (!device) | |
c4753e57 | 131 | goto err_out; |
26d46867 ZR |
132 | |
133 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
0794469d | 134 | "Hot-removing device %s...\n", dev_name(&device->dev))); |
26d46867 ZR |
135 | |
136 | if (acpi_bus_trim(device, 1)) { | |
55ac9a01 LM |
137 | printk(KERN_ERR PREFIX |
138 | "Removing device failed\n"); | |
c4753e57 | 139 | goto err_out; |
26d46867 | 140 | } |
1da177e4 | 141 | |
b3c450c3 TK |
142 | /* device has been freed */ |
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 | |
1da177e4 | 187 | static ssize_t |
f883d9db PM |
188 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
189 | const char *buf, size_t count) | |
1da177e4 | 190 | { |
4be44fcd | 191 | int ret = count; |
4be44fcd | 192 | acpi_status status; |
4be44fcd | 193 | acpi_object_type type = 0; |
f883d9db | 194 | struct acpi_device *acpi_device = to_acpi_device(d); |
c4753e57 | 195 | struct acpi_eject_event *ej_event; |
1da177e4 | 196 | |
1da177e4 LT |
197 | if ((!count) || (buf[0] != '1')) { |
198 | return -EINVAL; | |
199 | } | |
1da177e4 | 200 | #ifndef FORCE_EJECT |
f883d9db | 201 | if (acpi_device->driver == NULL) { |
1da177e4 LT |
202 | ret = -ENODEV; |
203 | goto err; | |
204 | } | |
205 | #endif | |
f883d9db PM |
206 | status = acpi_get_type(acpi_device->handle, &type); |
207 | if (ACPI_FAILURE(status) || (!acpi_device->flags.ejectable)) { | |
1da177e4 LT |
208 | ret = -ENODEV; |
209 | goto err; | |
210 | } | |
1da177e4 | 211 | |
c4753e57 TK |
212 | ej_event = kmalloc(sizeof(*ej_event), GFP_KERNEL); |
213 | if (!ej_event) { | |
214 | ret = -ENOMEM; | |
215 | goto err; | |
216 | } | |
217 | ||
218 | ej_event->handle = acpi_device->handle; | |
219 | if (acpi_device->flags.eject_pending) { | |
220 | /* event originated from ACPI eject notification */ | |
221 | ej_event->event = ACPI_NOTIFY_EJECT_REQUEST; | |
222 | acpi_device->flags.eject_pending = 0; | |
223 | } else { | |
224 | /* event originated from user */ | |
225 | ej_event->event = ACPI_OST_EC_OSPM_EJECT; | |
226 | (void) acpi_evaluate_hotplug_ost(ej_event->handle, | |
227 | ej_event->event, ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); | |
228 | } | |
229 | ||
230 | acpi_os_hotplug_execute(acpi_bus_hot_remove_device, (void *)ej_event); | |
74523c90 | 231 | err: |
1da177e4 | 232 | return ret; |
1da177e4 LT |
233 | } |
234 | ||
f883d9db | 235 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
1da177e4 | 236 | |
e49bd2dd ZR |
237 | static ssize_t |
238 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
239 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1da177e4 | 240 | |
ea8d82fd | 241 | return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev)); |
1da177e4 | 242 | } |
e49bd2dd | 243 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
1da177e4 | 244 | |
923d4a45 LZ |
245 | static ssize_t acpi_device_uid_show(struct device *dev, |
246 | struct device_attribute *attr, char *buf) | |
247 | { | |
248 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
249 | ||
250 | return sprintf(buf, "%s\n", acpi_dev->pnp.unique_id); | |
251 | } | |
252 | static DEVICE_ATTR(uid, 0444, acpi_device_uid_show, NULL); | |
253 | ||
254 | static ssize_t acpi_device_adr_show(struct device *dev, | |
255 | struct device_attribute *attr, char *buf) | |
256 | { | |
257 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
258 | ||
259 | return sprintf(buf, "0x%08x\n", | |
260 | (unsigned int)(acpi_dev->pnp.bus_address)); | |
261 | } | |
262 | static DEVICE_ATTR(adr, 0444, acpi_device_adr_show, NULL); | |
263 | ||
e49bd2dd ZR |
264 | static ssize_t |
265 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
266 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
267 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
268 | int result; | |
1da177e4 | 269 | |
e49bd2dd | 270 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
0c526d96 | 271 | if (result) |
e49bd2dd | 272 | goto end; |
1da177e4 | 273 | |
e49bd2dd ZR |
274 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
275 | kfree(path.pointer); | |
0c526d96 | 276 | end: |
e49bd2dd | 277 | return result; |
1da177e4 | 278 | } |
e49bd2dd | 279 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
1da177e4 | 280 | |
d1efe3c3 LO |
281 | /* sysfs file that shows description text from the ACPI _STR method */ |
282 | static ssize_t description_show(struct device *dev, | |
283 | struct device_attribute *attr, | |
284 | char *buf) { | |
285 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
286 | int result; | |
287 | ||
288 | if (acpi_dev->pnp.str_obj == NULL) | |
289 | return 0; | |
290 | ||
291 | /* | |
292 | * The _STR object contains a Unicode identifier for a device. | |
293 | * We need to convert to utf-8 so it can be displayed. | |
294 | */ | |
295 | result = utf16s_to_utf8s( | |
296 | (wchar_t *)acpi_dev->pnp.str_obj->buffer.pointer, | |
297 | acpi_dev->pnp.str_obj->buffer.length, | |
298 | UTF16_LITTLE_ENDIAN, buf, | |
299 | PAGE_SIZE); | |
300 | ||
301 | buf[result++] = '\n'; | |
302 | ||
303 | return result; | |
304 | } | |
305 | static DEVICE_ATTR(description, 0444, description_show, NULL); | |
306 | ||
bb74ac23 YI |
307 | static ssize_t |
308 | acpi_device_sun_show(struct device *dev, struct device_attribute *attr, | |
309 | char *buf) { | |
310 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
311 | ||
312 | return sprintf(buf, "%lu\n", acpi_dev->pnp.sun); | |
313 | } | |
314 | static DEVICE_ATTR(sun, 0444, acpi_device_sun_show, NULL); | |
315 | ||
e49bd2dd | 316 | static int acpi_device_setup_files(struct acpi_device *dev) |
1da177e4 | 317 | { |
d1efe3c3 | 318 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
f883d9db PM |
319 | acpi_status status; |
320 | acpi_handle temp; | |
bb74ac23 | 321 | unsigned long long sun; |
e49bd2dd | 322 | int result = 0; |
1da177e4 LT |
323 | |
324 | /* | |
e49bd2dd | 325 | * Devices gotten from FADT don't have a "path" attribute |
1da177e4 | 326 | */ |
0c526d96 | 327 | if (dev->handle) { |
e49bd2dd | 328 | result = device_create_file(&dev->dev, &dev_attr_path); |
0c526d96 | 329 | if (result) |
e49bd2dd | 330 | goto end; |
1da177e4 LT |
331 | } |
332 | ||
2b2ae7c7 TR |
333 | if (!list_empty(&dev->pnp.ids)) { |
334 | result = device_create_file(&dev->dev, &dev_attr_hid); | |
335 | if (result) | |
336 | goto end; | |
1da177e4 | 337 | |
2b2ae7c7 TR |
338 | result = device_create_file(&dev->dev, &dev_attr_modalias); |
339 | if (result) | |
340 | goto end; | |
341 | } | |
29b71a1c | 342 | |
d1efe3c3 LO |
343 | /* |
344 | * If device has _STR, 'description' file is created | |
345 | */ | |
346 | status = acpi_get_handle(dev->handle, "_STR", &temp); | |
347 | if (ACPI_SUCCESS(status)) { | |
348 | status = acpi_evaluate_object(dev->handle, "_STR", | |
349 | NULL, &buffer); | |
350 | if (ACPI_FAILURE(status)) | |
351 | buffer.pointer = NULL; | |
352 | dev->pnp.str_obj = buffer.pointer; | |
353 | result = device_create_file(&dev->dev, &dev_attr_description); | |
354 | if (result) | |
355 | goto end; | |
356 | } | |
357 | ||
923d4a45 LZ |
358 | if (dev->flags.bus_address) |
359 | result = device_create_file(&dev->dev, &dev_attr_adr); | |
360 | if (dev->pnp.unique_id) | |
361 | result = device_create_file(&dev->dev, &dev_attr_uid); | |
362 | ||
bb74ac23 YI |
363 | status = acpi_evaluate_integer(dev->handle, "_SUN", NULL, &sun); |
364 | if (ACPI_SUCCESS(status)) { | |
365 | dev->pnp.sun = (unsigned long)sun; | |
366 | result = device_create_file(&dev->dev, &dev_attr_sun); | |
367 | if (result) | |
368 | goto end; | |
369 | } else { | |
370 | dev->pnp.sun = (unsigned long)-1; | |
371 | } | |
372 | ||
e49bd2dd ZR |
373 | /* |
374 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
375 | * hot-removal function from userland. | |
376 | */ | |
f883d9db PM |
377 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); |
378 | if (ACPI_SUCCESS(status)) | |
e49bd2dd | 379 | result = device_create_file(&dev->dev, &dev_attr_eject); |
0c526d96 | 380 | end: |
e49bd2dd | 381 | return result; |
1da177e4 LT |
382 | } |
383 | ||
f883d9db | 384 | static void acpi_device_remove_files(struct acpi_device *dev) |
1da177e4 | 385 | { |
f883d9db PM |
386 | acpi_status status; |
387 | acpi_handle temp; | |
1da177e4 | 388 | |
f883d9db | 389 | /* |
d1efe3c3 LO |
390 | * If device has _STR, remove 'description' file |
391 | */ | |
392 | status = acpi_get_handle(dev->handle, "_STR", &temp); | |
393 | if (ACPI_SUCCESS(status)) { | |
394 | kfree(dev->pnp.str_obj); | |
395 | device_remove_file(&dev->dev, &dev_attr_description); | |
396 | } | |
397 | /* | |
398 | * If device has _EJ0, remove 'eject' file. | |
f883d9db PM |
399 | */ |
400 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); | |
401 | if (ACPI_SUCCESS(status)) | |
402 | device_remove_file(&dev->dev, &dev_attr_eject); | |
1da177e4 | 403 | |
bb74ac23 YI |
404 | status = acpi_get_handle(dev->handle, "_SUN", &temp); |
405 | if (ACPI_SUCCESS(status)) | |
406 | device_remove_file(&dev->dev, &dev_attr_sun); | |
407 | ||
923d4a45 LZ |
408 | if (dev->pnp.unique_id) |
409 | device_remove_file(&dev->dev, &dev_attr_uid); | |
410 | if (dev->flags.bus_address) | |
411 | device_remove_file(&dev->dev, &dev_attr_adr); | |
1131b938 BH |
412 | device_remove_file(&dev->dev, &dev_attr_modalias); |
413 | device_remove_file(&dev->dev, &dev_attr_hid); | |
0c526d96 | 414 | if (dev->handle) |
e49bd2dd | 415 | device_remove_file(&dev->dev, &dev_attr_path); |
1da177e4 | 416 | } |
1da177e4 | 417 | /* -------------------------------------------------------------------------- |
9e89dde2 | 418 | ACPI Bus operations |
1da177e4 | 419 | -------------------------------------------------------------------------- */ |
29b71a1c | 420 | |
cf761af9 MW |
421 | static const struct acpi_device_id *__acpi_match_device( |
422 | struct acpi_device *device, const struct acpi_device_id *ids) | |
29b71a1c TR |
423 | { |
424 | const struct acpi_device_id *id; | |
7f47fa6c | 425 | struct acpi_hardware_id *hwid; |
29b71a1c | 426 | |
39a0ad87 ZY |
427 | /* |
428 | * If the device is not present, it is unnecessary to load device | |
429 | * driver for it. | |
430 | */ | |
431 | if (!device->status.present) | |
cf761af9 | 432 | return NULL; |
39a0ad87 | 433 | |
7f47fa6c BH |
434 | for (id = ids; id->id[0]; id++) |
435 | list_for_each_entry(hwid, &device->pnp.ids, list) | |
436 | if (!strcmp((char *) id->id, hwid->id)) | |
cf761af9 MW |
437 | return id; |
438 | ||
439 | return NULL; | |
440 | } | |
441 | ||
442 | /** | |
443 | * acpi_match_device - Match a struct device against a given list of ACPI IDs | |
444 | * @ids: Array of struct acpi_device_id object to match against. | |
445 | * @dev: The device structure to match. | |
446 | * | |
447 | * Check if @dev has a valid ACPI handle and if there is a struct acpi_device | |
448 | * object for that handle and use that object to match against a given list of | |
449 | * device IDs. | |
450 | * | |
451 | * Return a pointer to the first matching ID on success or %NULL on failure. | |
452 | */ | |
453 | const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids, | |
454 | const struct device *dev) | |
455 | { | |
456 | struct acpi_device *adev; | |
457 | ||
95f8a082 RW |
458 | if (!ids || !ACPI_HANDLE(dev) |
459 | || ACPI_FAILURE(acpi_bus_get_device(ACPI_HANDLE(dev), &adev))) | |
cf761af9 MW |
460 | return NULL; |
461 | ||
462 | return __acpi_match_device(adev, ids); | |
463 | } | |
464 | EXPORT_SYMBOL_GPL(acpi_match_device); | |
29b71a1c | 465 | |
cf761af9 MW |
466 | int acpi_match_device_ids(struct acpi_device *device, |
467 | const struct acpi_device_id *ids) | |
468 | { | |
469 | return __acpi_match_device(device, ids) ? 0 : -ENOENT; | |
29b71a1c TR |
470 | } |
471 | EXPORT_SYMBOL(acpi_match_device_ids); | |
472 | ||
7f47fa6c BH |
473 | static void acpi_free_ids(struct acpi_device *device) |
474 | { | |
475 | struct acpi_hardware_id *id, *tmp; | |
476 | ||
477 | list_for_each_entry_safe(id, tmp, &device->pnp.ids, list) { | |
478 | kfree(id->id); | |
479 | kfree(id); | |
480 | } | |
481 | } | |
482 | ||
1890a97a | 483 | static void acpi_device_release(struct device *dev) |
1da177e4 | 484 | { |
1890a97a | 485 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 486 | |
7f47fa6c | 487 | acpi_free_ids(acpi_dev); |
ccf78040 | 488 | kfree(acpi_dev->pnp.unique_id); |
1890a97a | 489 | kfree(acpi_dev); |
1da177e4 LT |
490 | } |
491 | ||
5d9464a4 | 492 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 493 | { |
5d9464a4 PM |
494 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
495 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
1da177e4 | 496 | |
805d410f RW |
497 | return acpi_dev->bus_ops.acpi_op_match |
498 | && !acpi_match_device_ids(acpi_dev, acpi_drv->ids); | |
5d9464a4 | 499 | } |
1da177e4 | 500 | |
7eff2e7a | 501 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 | 502 | { |
5d9464a4 | 503 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
7eff2e7a | 504 | int len; |
5d9464a4 | 505 | |
2b2ae7c7 TR |
506 | if (list_empty(&acpi_dev->pnp.ids)) |
507 | return 0; | |
508 | ||
7eff2e7a KS |
509 | if (add_uevent_var(env, "MODALIAS=")) |
510 | return -ENOMEM; | |
511 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], | |
512 | sizeof(env->buf) - env->buflen); | |
513 | if (len >= (sizeof(env->buf) - env->buflen)) | |
514 | return -ENOMEM; | |
515 | env->buflen += len; | |
9e89dde2 | 516 | return 0; |
1da177e4 LT |
517 | } |
518 | ||
46ec8598 BH |
519 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
520 | { | |
521 | struct acpi_device *device = data; | |
522 | ||
523 | device->driver->ops.notify(device, event); | |
524 | } | |
525 | ||
526 | static acpi_status acpi_device_notify_fixed(void *data) | |
527 | { | |
528 | struct acpi_device *device = data; | |
529 | ||
53de5356 BH |
530 | /* Fixed hardware devices have no handles */ |
531 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); | |
46ec8598 BH |
532 | return AE_OK; |
533 | } | |
534 | ||
535 | static int acpi_device_install_notify_handler(struct acpi_device *device) | |
536 | { | |
537 | acpi_status status; | |
46ec8598 | 538 | |
ccba2a36 | 539 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
540 | status = |
541 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
542 | acpi_device_notify_fixed, | |
543 | device); | |
ccba2a36 | 544 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
545 | status = |
546 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
547 | acpi_device_notify_fixed, | |
548 | device); | |
549 | else | |
550 | status = acpi_install_notify_handler(device->handle, | |
551 | ACPI_DEVICE_NOTIFY, | |
552 | acpi_device_notify, | |
553 | device); | |
554 | ||
555 | if (ACPI_FAILURE(status)) | |
556 | return -EINVAL; | |
557 | return 0; | |
558 | } | |
559 | ||
560 | static void acpi_device_remove_notify_handler(struct acpi_device *device) | |
561 | { | |
ccba2a36 | 562 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
563 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, |
564 | acpi_device_notify_fixed); | |
ccba2a36 | 565 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
566 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, |
567 | acpi_device_notify_fixed); | |
568 | else | |
569 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, | |
570 | acpi_device_notify); | |
571 | } | |
572 | ||
5d9464a4 PM |
573 | static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *); |
574 | static int acpi_start_single_object(struct acpi_device *); | |
575 | static int acpi_device_probe(struct device * dev) | |
1da177e4 | 576 | { |
5d9464a4 PM |
577 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
578 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
579 | int ret; | |
580 | ||
581 | ret = acpi_bus_driver_init(acpi_dev, acpi_drv); | |
582 | if (!ret) { | |
c4168bff LS |
583 | if (acpi_dev->bus_ops.acpi_op_start) |
584 | acpi_start_single_object(acpi_dev); | |
46ec8598 BH |
585 | |
586 | if (acpi_drv->ops.notify) { | |
587 | ret = acpi_device_install_notify_handler(acpi_dev); | |
588 | if (ret) { | |
46ec8598 BH |
589 | if (acpi_drv->ops.remove) |
590 | acpi_drv->ops.remove(acpi_dev, | |
591 | acpi_dev->removal_type); | |
592 | return ret; | |
593 | } | |
594 | } | |
595 | ||
5d9464a4 PM |
596 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
597 | "Found driver [%s] for device [%s]\n", | |
598 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
599 | get_device(dev); | |
600 | } | |
601 | return ret; | |
602 | } | |
1da177e4 | 603 | |
5d9464a4 PM |
604 | static int acpi_device_remove(struct device * dev) |
605 | { | |
606 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
607 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
608 | ||
609 | if (acpi_drv) { | |
46ec8598 BH |
610 | if (acpi_drv->ops.notify) |
611 | acpi_device_remove_notify_handler(acpi_dev); | |
5d9464a4 | 612 | if (acpi_drv->ops.remove) |
96333578 | 613 | acpi_drv->ops.remove(acpi_dev, acpi_dev->removal_type); |
1da177e4 | 614 | } |
5d9464a4 | 615 | acpi_dev->driver = NULL; |
db89b4f0 | 616 | acpi_dev->driver_data = NULL; |
1da177e4 | 617 | |
5d9464a4 | 618 | put_device(dev); |
9e89dde2 ZR |
619 | return 0; |
620 | } | |
1da177e4 | 621 | |
55955aad | 622 | struct bus_type acpi_bus_type = { |
9e89dde2 | 623 | .name = "acpi", |
5d9464a4 PM |
624 | .match = acpi_bus_match, |
625 | .probe = acpi_device_probe, | |
626 | .remove = acpi_device_remove, | |
627 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
628 | }; |
629 | ||
66b7ed40 | 630 | static int acpi_device_register(struct acpi_device *device) |
1da177e4 | 631 | { |
4be44fcd | 632 | int result; |
e49bd2dd ZR |
633 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
634 | int found = 0; | |
66b7ed40 | 635 | |
9e89dde2 ZR |
636 | /* |
637 | * Linkage | |
638 | * ------- | |
639 | * Link this device to its parent and siblings. | |
640 | */ | |
641 | INIT_LIST_HEAD(&device->children); | |
642 | INIT_LIST_HEAD(&device->node); | |
9e89dde2 | 643 | INIT_LIST_HEAD(&device->wakeup_list); |
1033f904 LT |
644 | INIT_LIST_HEAD(&device->physical_node_list); |
645 | mutex_init(&device->physical_node_lock); | |
1da177e4 | 646 | |
e49bd2dd ZR |
647 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
648 | if (!new_bus_id) { | |
649 | printk(KERN_ERR PREFIX "Memory allocation error\n"); | |
650 | return -ENOMEM; | |
1da177e4 | 651 | } |
e49bd2dd | 652 | |
9090589d | 653 | mutex_lock(&acpi_device_lock); |
e49bd2dd ZR |
654 | /* |
655 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
656 | * If failed, create one and link it into acpi_bus_id_list | |
657 | */ | |
658 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
1131b938 BH |
659 | if (!strcmp(acpi_device_bus_id->bus_id, |
660 | acpi_device_hid(device))) { | |
661 | acpi_device_bus_id->instance_no++; | |
e49bd2dd ZR |
662 | found = 1; |
663 | kfree(new_bus_id); | |
664 | break; | |
665 | } | |
1da177e4 | 666 | } |
0c526d96 | 667 | if (!found) { |
e49bd2dd | 668 | acpi_device_bus_id = new_bus_id; |
1131b938 | 669 | strcpy(acpi_device_bus_id->bus_id, acpi_device_hid(device)); |
e49bd2dd ZR |
670 | acpi_device_bus_id->instance_no = 0; |
671 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 672 | } |
0794469d | 673 | dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 674 | |
33b57150 | 675 | if (device->parent) |
9e89dde2 | 676 | list_add_tail(&device->node, &device->parent->children); |
33b57150 | 677 | |
9e89dde2 ZR |
678 | if (device->wakeup.flags.valid) |
679 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
9090589d | 680 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 681 | |
1890a97a | 682 | if (device->parent) |
66b7ed40 | 683 | device->dev.parent = &device->parent->dev; |
1890a97a | 684 | device->dev.bus = &acpi_bus_type; |
1890a97a | 685 | device->dev.release = &acpi_device_release; |
8b12b922 | 686 | result = device_register(&device->dev); |
0c526d96 | 687 | if (result) { |
8b12b922 | 688 | dev_err(&device->dev, "Error registering device\n"); |
e49bd2dd | 689 | goto end; |
1da177e4 | 690 | } |
1da177e4 | 691 | |
e49bd2dd | 692 | result = acpi_device_setup_files(device); |
0c526d96 | 693 | if (result) |
0794469d KS |
694 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
695 | dev_name(&device->dev)); | |
1da177e4 | 696 | |
96333578 | 697 | device->removal_type = ACPI_BUS_REMOVAL_NORMAL; |
1da177e4 | 698 | return 0; |
0c526d96 | 699 | end: |
9090589d | 700 | mutex_lock(&acpi_device_lock); |
33b57150 | 701 | if (device->parent) |
e49bd2dd | 702 | list_del(&device->node); |
e49bd2dd | 703 | list_del(&device->wakeup_list); |
9090589d | 704 | mutex_unlock(&acpi_device_lock); |
e49bd2dd | 705 | return result; |
1da177e4 LT |
706 | } |
707 | ||
9e89dde2 ZR |
708 | static void acpi_device_unregister(struct acpi_device *device, int type) |
709 | { | |
9090589d | 710 | mutex_lock(&acpi_device_lock); |
33b57150 | 711 | if (device->parent) |
9e89dde2 | 712 | list_del(&device->node); |
1da177e4 | 713 | |
9e89dde2 | 714 | list_del(&device->wakeup_list); |
9090589d | 715 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 716 | |
9e89dde2 | 717 | acpi_detach_data(device->handle, acpi_bus_data_handler); |
1890a97a | 718 | |
f883d9db | 719 | acpi_device_remove_files(device); |
1890a97a | 720 | device_unregister(&device->dev); |
1da177e4 LT |
721 | } |
722 | ||
9e89dde2 ZR |
723 | /* -------------------------------------------------------------------------- |
724 | Driver Management | |
725 | -------------------------------------------------------------------------- */ | |
1da177e4 | 726 | /** |
d758a8fa RD |
727 | * acpi_bus_driver_init - add a device to a driver |
728 | * @device: the device to add and initialize | |
729 | * @driver: driver for the device | |
730 | * | |
0c526d96 | 731 | * Used to initialize a device via its device driver. Called whenever a |
1890a97a | 732 | * driver is bound to a device. Invokes the driver's add() ops. |
1da177e4 LT |
733 | */ |
734 | static int | |
4be44fcd | 735 | acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) |
1da177e4 | 736 | { |
4be44fcd | 737 | int result = 0; |
1da177e4 | 738 | |
1da177e4 | 739 | if (!device || !driver) |
d550d98d | 740 | return -EINVAL; |
1da177e4 LT |
741 | |
742 | if (!driver->ops.add) | |
d550d98d | 743 | return -ENOSYS; |
1da177e4 LT |
744 | |
745 | result = driver->ops.add(device); | |
746 | if (result) { | |
747 | device->driver = NULL; | |
db89b4f0 | 748 | device->driver_data = NULL; |
d550d98d | 749 | return result; |
1da177e4 LT |
750 | } |
751 | ||
752 | device->driver = driver; | |
753 | ||
754 | /* | |
755 | * TBD - Configuration Management: Assign resources to device based | |
756 | * upon possible configuration and currently allocated resources. | |
757 | */ | |
758 | ||
4be44fcd LB |
759 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
760 | "Driver successfully bound to device\n")); | |
d550d98d | 761 | return 0; |
3fb02738 RS |
762 | } |
763 | ||
8713cbef | 764 | static int acpi_start_single_object(struct acpi_device *device) |
3fb02738 RS |
765 | { |
766 | int result = 0; | |
767 | struct acpi_driver *driver; | |
768 | ||
3fb02738 RS |
769 | |
770 | if (!(driver = device->driver)) | |
d550d98d | 771 | return 0; |
3fb02738 | 772 | |
1da177e4 LT |
773 | if (driver->ops.start) { |
774 | result = driver->ops.start(device); | |
775 | if (result && driver->ops.remove) | |
776 | driver->ops.remove(device, ACPI_BUS_REMOVAL_NORMAL); | |
1da177e4 LT |
777 | } |
778 | ||
d550d98d | 779 | return result; |
1da177e4 LT |
780 | } |
781 | ||
9e89dde2 ZR |
782 | /** |
783 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
784 | * @driver: driver being registered | |
785 | * | |
786 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
787 | * devices that match the driver's criteria and binds. Returns zero for | |
788 | * success or a negative error status for failure. | |
789 | */ | |
790 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
1da177e4 | 791 | { |
1890a97a | 792 | int ret; |
1da177e4 | 793 | |
9e89dde2 ZR |
794 | if (acpi_disabled) |
795 | return -ENODEV; | |
1890a97a PM |
796 | driver->drv.name = driver->name; |
797 | driver->drv.bus = &acpi_bus_type; | |
798 | driver->drv.owner = driver->owner; | |
1da177e4 | 799 | |
1890a97a PM |
800 | ret = driver_register(&driver->drv); |
801 | return ret; | |
9e89dde2 | 802 | } |
1da177e4 | 803 | |
9e89dde2 ZR |
804 | EXPORT_SYMBOL(acpi_bus_register_driver); |
805 | ||
806 | /** | |
807 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus | |
808 | * @driver: driver to unregister | |
809 | * | |
810 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
811 | * devices that match the driver's criteria and unbinds. | |
812 | */ | |
813 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
814 | { | |
1890a97a | 815 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
816 | } |
817 | ||
818 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
819 | ||
9e89dde2 ZR |
820 | /* -------------------------------------------------------------------------- |
821 | Device Enumeration | |
822 | -------------------------------------------------------------------------- */ | |
5c478f49 BH |
823 | static struct acpi_device *acpi_bus_get_parent(acpi_handle handle) |
824 | { | |
825 | acpi_status status; | |
826 | int ret; | |
827 | struct acpi_device *device; | |
828 | ||
829 | /* | |
830 | * Fixed hardware devices do not appear in the namespace and do not | |
831 | * have handles, but we fabricate acpi_devices for them, so we have | |
832 | * to deal with them specially. | |
833 | */ | |
834 | if (handle == NULL) | |
835 | return acpi_root; | |
836 | ||
837 | do { | |
838 | status = acpi_get_parent(handle, &handle); | |
839 | if (status == AE_NULL_ENTRY) | |
840 | return NULL; | |
841 | if (ACPI_FAILURE(status)) | |
842 | return acpi_root; | |
843 | ||
844 | ret = acpi_bus_get_device(handle, &device); | |
845 | if (ret == 0) | |
846 | return device; | |
847 | } while (1); | |
848 | } | |
849 | ||
9e89dde2 ZR |
850 | acpi_status |
851 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
852 | { | |
853 | acpi_status status; | |
854 | acpi_handle tmp; | |
855 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
856 | union acpi_object *obj; | |
857 | ||
858 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
859 | if (ACPI_FAILURE(status)) | |
860 | return status; | |
861 | ||
862 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
863 | if (ACPI_SUCCESS(status)) { | |
864 | obj = buffer.pointer; | |
3b5fee59 HM |
865 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
866 | ejd); | |
9e89dde2 ZR |
867 | kfree(buffer.pointer); |
868 | } | |
869 | return status; | |
870 | } | |
871 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
872 | ||
8e4319c4 | 873 | void acpi_bus_data_handler(acpi_handle handle, void *context) |
9e89dde2 ZR |
874 | { |
875 | ||
876 | /* TBD */ | |
877 | ||
878 | return; | |
879 | } | |
880 | ||
9e89dde2 ZR |
881 | static int acpi_bus_get_perf_flags(struct acpi_device *device) |
882 | { | |
883 | device->performance.state = ACPI_STATE_UNKNOWN; | |
884 | return 0; | |
885 | } | |
886 | ||
887 | static acpi_status | |
b581a7f9 RW |
888 | acpi_bus_extract_wakeup_device_power_package(acpi_handle handle, |
889 | struct acpi_device_wakeup *wakeup) | |
9e89dde2 | 890 | { |
b581a7f9 RW |
891 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
892 | union acpi_object *package = NULL; | |
9e89dde2 | 893 | union acpi_object *element = NULL; |
b581a7f9 RW |
894 | acpi_status status; |
895 | int i = 0; | |
9e89dde2 | 896 | |
b581a7f9 | 897 | if (!wakeup) |
9e89dde2 ZR |
898 | return AE_BAD_PARAMETER; |
899 | ||
b581a7f9 RW |
900 | /* _PRW */ |
901 | status = acpi_evaluate_object(handle, "_PRW", NULL, &buffer); | |
902 | if (ACPI_FAILURE(status)) { | |
903 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
904 | return status; | |
905 | } | |
906 | ||
907 | package = (union acpi_object *)buffer.pointer; | |
908 | ||
909 | if (!package || (package->package.count < 2)) { | |
910 | status = AE_BAD_DATA; | |
911 | goto out; | |
912 | } | |
913 | ||
9e89dde2 | 914 | element = &(package->package.elements[0]); |
b581a7f9 RW |
915 | if (!element) { |
916 | status = AE_BAD_DATA; | |
917 | goto out; | |
918 | } | |
9e89dde2 ZR |
919 | if (element->type == ACPI_TYPE_PACKAGE) { |
920 | if ((element->package.count < 2) || | |
921 | (element->package.elements[0].type != | |
922 | ACPI_TYPE_LOCAL_REFERENCE) | |
b581a7f9 RW |
923 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) { |
924 | status = AE_BAD_DATA; | |
925 | goto out; | |
926 | } | |
927 | wakeup->gpe_device = | |
9e89dde2 | 928 | element->package.elements[0].reference.handle; |
b581a7f9 | 929 | wakeup->gpe_number = |
9e89dde2 ZR |
930 | (u32) element->package.elements[1].integer.value; |
931 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
b581a7f9 RW |
932 | wakeup->gpe_device = NULL; |
933 | wakeup->gpe_number = element->integer.value; | |
934 | } else { | |
935 | status = AE_BAD_DATA; | |
936 | goto out; | |
937 | } | |
9e89dde2 ZR |
938 | |
939 | element = &(package->package.elements[1]); | |
940 | if (element->type != ACPI_TYPE_INTEGER) { | |
b581a7f9 RW |
941 | status = AE_BAD_DATA; |
942 | goto out; | |
9e89dde2 | 943 | } |
b581a7f9 | 944 | wakeup->sleep_state = element->integer.value; |
9e89dde2 ZR |
945 | |
946 | if ((package->package.count - 2) > ACPI_MAX_HANDLES) { | |
b581a7f9 RW |
947 | status = AE_NO_MEMORY; |
948 | goto out; | |
9e89dde2 | 949 | } |
b581a7f9 RW |
950 | wakeup->resources.count = package->package.count - 2; |
951 | for (i = 0; i < wakeup->resources.count; i++) { | |
9e89dde2 | 952 | element = &(package->package.elements[i + 2]); |
b581a7f9 RW |
953 | if (element->type != ACPI_TYPE_LOCAL_REFERENCE) { |
954 | status = AE_BAD_DATA; | |
955 | goto out; | |
956 | } | |
9e89dde2 | 957 | |
b581a7f9 | 958 | wakeup->resources.handles[i] = element->reference.handle; |
1da177e4 | 959 | } |
9e89dde2 | 960 | |
bba63a29 | 961 | acpi_setup_gpe_for_wake(handle, wakeup->gpe_device, wakeup->gpe_number); |
9874647b | 962 | |
b581a7f9 RW |
963 | out: |
964 | kfree(buffer.pointer); | |
965 | ||
966 | return status; | |
1da177e4 LT |
967 | } |
968 | ||
f517709d | 969 | static void acpi_bus_set_run_wake_flags(struct acpi_device *device) |
1da177e4 | 970 | { |
29b71a1c | 971 | struct acpi_device_id button_device_ids[] = { |
29b71a1c | 972 | {"PNP0C0C", 0}, |
b7e38304 | 973 | {"PNP0C0D", 0}, |
29b71a1c TR |
974 | {"PNP0C0E", 0}, |
975 | {"", 0}, | |
976 | }; | |
f517709d RW |
977 | acpi_status status; |
978 | acpi_event_status event_status; | |
979 | ||
b67ea761 | 980 | device->wakeup.flags.notifier_present = 0; |
f517709d RW |
981 | |
982 | /* Power button, Lid switch always enable wakeup */ | |
983 | if (!acpi_match_device_ids(device, button_device_ids)) { | |
984 | device->wakeup.flags.run_wake = 1; | |
b7e38304 ZR |
985 | if (!acpi_match_device_ids(device, &button_device_ids[1])) { |
986 | /* Do not use Lid/sleep button for S5 wakeup */ | |
987 | if (device->wakeup.sleep_state == ACPI_STATE_S5) | |
988 | device->wakeup.sleep_state = ACPI_STATE_S4; | |
989 | } | |
f2b56bc8 | 990 | device_set_wakeup_capable(&device->dev, true); |
f517709d RW |
991 | return; |
992 | } | |
993 | ||
e8e18c95 RW |
994 | status = acpi_get_gpe_status(device->wakeup.gpe_device, |
995 | device->wakeup.gpe_number, | |
996 | &event_status); | |
f517709d RW |
997 | if (status == AE_OK) |
998 | device->wakeup.flags.run_wake = | |
999 | !!(event_status & ACPI_EVENT_FLAG_HANDLE); | |
1000 | } | |
1001 | ||
d57d09a4 | 1002 | static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
f517709d | 1003 | { |
d57d09a4 | 1004 | acpi_handle temp; |
f517709d | 1005 | acpi_status status = 0; |
f517709d | 1006 | int psw_error; |
29b71a1c | 1007 | |
d57d09a4 RW |
1008 | /* Presence of _PRW indicates wake capable */ |
1009 | status = acpi_get_handle(device->handle, "_PRW", &temp); | |
1010 | if (ACPI_FAILURE(status)) | |
1011 | return; | |
1012 | ||
b581a7f9 RW |
1013 | status = acpi_bus_extract_wakeup_device_power_package(device->handle, |
1014 | &device->wakeup); | |
9e89dde2 ZR |
1015 | if (ACPI_FAILURE(status)) { |
1016 | ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package")); | |
d57d09a4 | 1017 | return; |
9e89dde2 | 1018 | } |
1da177e4 | 1019 | |
9e89dde2 | 1020 | device->wakeup.flags.valid = 1; |
9b83ccd2 | 1021 | device->wakeup.prepare_count = 0; |
f517709d | 1022 | acpi_bus_set_run_wake_flags(device); |
729b2bdb ZY |
1023 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
1024 | * system for the ACPI device with the _PRW object. | |
1025 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. | |
1026 | * So it is necessary to call _DSW object first. Only when it is not | |
1027 | * present will the _PSW object used. | |
1028 | */ | |
77e76609 RW |
1029 | psw_error = acpi_device_sleep_wake(device, 0, 0, 0); |
1030 | if (psw_error) | |
1031 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
1032 | "error in _DSW or _PSW evaluation\n")); | |
1da177e4 | 1033 | } |
1da177e4 | 1034 | |
bf325f95 RW |
1035 | static void acpi_bus_add_power_resource(acpi_handle handle); |
1036 | ||
9e89dde2 | 1037 | static int acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 1038 | { |
9e89dde2 ZR |
1039 | acpi_status status = 0; |
1040 | acpi_handle handle = NULL; | |
1041 | u32 i = 0; | |
1a365616 | 1042 | |
4be44fcd | 1043 | |
9e89dde2 ZR |
1044 | /* |
1045 | * Power Management Flags | |
1046 | */ | |
1047 | status = acpi_get_handle(device->handle, "_PSC", &handle); | |
1048 | if (ACPI_SUCCESS(status)) | |
1049 | device->power.flags.explicit_get = 1; | |
1050 | status = acpi_get_handle(device->handle, "_IRC", &handle); | |
1051 | if (ACPI_SUCCESS(status)) | |
1052 | device->power.flags.inrush_current = 1; | |
1da177e4 | 1053 | |
9e89dde2 ZR |
1054 | /* |
1055 | * Enumerate supported power management states | |
1056 | */ | |
1cc0c998 | 1057 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) { |
9e89dde2 ZR |
1058 | struct acpi_device_power_state *ps = &device->power.states[i]; |
1059 | char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' }; | |
1da177e4 | 1060 | |
9e89dde2 ZR |
1061 | /* Evaluate "_PRx" to se if power resources are referenced */ |
1062 | acpi_evaluate_reference(device->handle, object_name, NULL, | |
1063 | &ps->resources); | |
1064 | if (ps->resources.count) { | |
bf325f95 RW |
1065 | int j; |
1066 | ||
9e89dde2 | 1067 | device->power.flags.power_resources = 1; |
bf325f95 RW |
1068 | for (j = 0; j < ps->resources.count; j++) |
1069 | acpi_bus_add_power_resource(ps->resources.handles[j]); | |
1da177e4 | 1070 | } |
1da177e4 | 1071 | |
9e89dde2 ZR |
1072 | /* Evaluate "_PSx" to see if we can do explicit sets */ |
1073 | object_name[2] = 'S'; | |
1074 | status = acpi_get_handle(device->handle, object_name, &handle); | |
37239978 | 1075 | if (ACPI_SUCCESS(status)) |
9e89dde2 | 1076 | ps->flags.explicit_set = 1; |
1da177e4 | 1077 | |
1cc0c998 LM |
1078 | /* |
1079 | * State is valid if there are means to put the device into it. | |
1080 | * D3hot is only valid if _PR3 present. | |
1081 | */ | |
1082 | if (ps->resources.count || | |
1399dfcd | 1083 | (ps->flags.explicit_set && i < ACPI_STATE_D3_HOT)) { |
9e89dde2 | 1084 | ps->flags.valid = 1; |
1399dfcd AL |
1085 | ps->flags.os_accessible = 1; |
1086 | } | |
1da177e4 | 1087 | |
9e89dde2 ZR |
1088 | ps->power = -1; /* Unknown - driver assigned */ |
1089 | ps->latency = -1; /* Unknown - driver assigned */ | |
1090 | } | |
1da177e4 | 1091 | |
9e89dde2 ZR |
1092 | /* Set defaults for D0 and D3 states (always valid) */ |
1093 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
1094 | device->power.states[ACPI_STATE_D0].power = 100; | |
1095 | device->power.states[ACPI_STATE_D3].flags.valid = 1; | |
1096 | device->power.states[ACPI_STATE_D3].power = 0; | |
c8f7a62c | 1097 | |
5c7dd710 RW |
1098 | /* Set D3cold's explicit_set flag if _PS3 exists. */ |
1099 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set) | |
1100 | device->power.states[ACPI_STATE_D3_COLD].flags.explicit_set = 1; | |
1101 | ||
1399dfcd AL |
1102 | /* Presence of _PS3 or _PRx means we can put the device into D3 cold */ |
1103 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set || | |
1104 | device->power.flags.power_resources) | |
1105 | device->power.states[ACPI_STATE_D3_COLD].flags.os_accessible = 1; | |
1106 | ||
ade3e7fe | 1107 | acpi_bus_init_power(device); |
c8f7a62c | 1108 | |
9e89dde2 ZR |
1109 | return 0; |
1110 | } | |
c8f7a62c | 1111 | |
4be44fcd | 1112 | static int acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 1113 | { |
4be44fcd LB |
1114 | acpi_status status = AE_OK; |
1115 | acpi_handle temp = NULL; | |
1da177e4 | 1116 | |
1da177e4 LT |
1117 | |
1118 | /* Presence of _STA indicates 'dynamic_status' */ | |
1119 | status = acpi_get_handle(device->handle, "_STA", &temp); | |
1120 | if (ACPI_SUCCESS(status)) | |
1121 | device->flags.dynamic_status = 1; | |
1122 | ||
1da177e4 LT |
1123 | /* Presence of _RMV indicates 'removable' */ |
1124 | status = acpi_get_handle(device->handle, "_RMV", &temp); | |
1125 | if (ACPI_SUCCESS(status)) | |
1126 | device->flags.removable = 1; | |
1127 | ||
1128 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
1129 | status = acpi_get_handle(device->handle, "_EJD", &temp); | |
1130 | if (ACPI_SUCCESS(status)) | |
1131 | device->flags.ejectable = 1; | |
1132 | else { | |
1133 | status = acpi_get_handle(device->handle, "_EJ0", &temp); | |
1134 | if (ACPI_SUCCESS(status)) | |
1135 | device->flags.ejectable = 1; | |
1136 | } | |
1137 | ||
7bed50c5 RW |
1138 | /* Power resources cannot be power manageable. */ |
1139 | if (device->device_type == ACPI_BUS_TYPE_POWER) | |
1140 | return 0; | |
1141 | ||
1da177e4 LT |
1142 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ |
1143 | status = acpi_get_handle(device->handle, "_PS0", &temp); | |
1144 | if (ACPI_FAILURE(status)) | |
1145 | status = acpi_get_handle(device->handle, "_PR0", &temp); | |
1146 | if (ACPI_SUCCESS(status)) | |
1147 | device->flags.power_manageable = 1; | |
1148 | ||
3c5f9be4 | 1149 | /* TBD: Performance management */ |
1da177e4 | 1150 | |
d550d98d | 1151 | return 0; |
1da177e4 LT |
1152 | } |
1153 | ||
c7bcb4e9 | 1154 | static void acpi_device_get_busid(struct acpi_device *device) |
1da177e4 | 1155 | { |
4be44fcd LB |
1156 | char bus_id[5] = { '?', 0 }; |
1157 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
1158 | int i = 0; | |
1da177e4 LT |
1159 | |
1160 | /* | |
1161 | * Bus ID | |
1162 | * ------ | |
1163 | * The device's Bus ID is simply the object name. | |
1164 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
1165 | */ | |
859ac9a4 | 1166 | if (ACPI_IS_ROOT_DEVICE(device)) { |
1da177e4 | 1167 | strcpy(device->pnp.bus_id, "ACPI"); |
859ac9a4 BH |
1168 | return; |
1169 | } | |
1170 | ||
1171 | switch (device->device_type) { | |
1da177e4 LT |
1172 | case ACPI_BUS_TYPE_POWER_BUTTON: |
1173 | strcpy(device->pnp.bus_id, "PWRF"); | |
1174 | break; | |
1175 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
1176 | strcpy(device->pnp.bus_id, "SLPF"); | |
1177 | break; | |
1178 | default: | |
66b7ed40 | 1179 | acpi_get_name(device->handle, ACPI_SINGLE_NAME, &buffer); |
1da177e4 LT |
1180 | /* Clean up trailing underscores (if any) */ |
1181 | for (i = 3; i > 1; i--) { | |
1182 | if (bus_id[i] == '_') | |
1183 | bus_id[i] = '\0'; | |
1184 | else | |
1185 | break; | |
1186 | } | |
1187 | strcpy(device->pnp.bus_id, bus_id); | |
1188 | break; | |
1189 | } | |
1190 | } | |
1191 | ||
54735266 ZR |
1192 | /* |
1193 | * acpi_bay_match - see if a device is an ejectable driver bay | |
1194 | * | |
1195 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
1196 | * then we can safely call it an ejectable drive bay | |
1197 | */ | |
1198 | static int acpi_bay_match(struct acpi_device *device){ | |
1199 | acpi_status status; | |
1200 | acpi_handle handle; | |
1201 | acpi_handle tmp; | |
1202 | acpi_handle phandle; | |
1203 | ||
1204 | handle = device->handle; | |
1205 | ||
1206 | status = acpi_get_handle(handle, "_EJ0", &tmp); | |
1207 | if (ACPI_FAILURE(status)) | |
1208 | return -ENODEV; | |
1209 | ||
1210 | if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || | |
1211 | (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || | |
1212 | (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || | |
1213 | (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) | |
1214 | return 0; | |
1215 | ||
1216 | if (acpi_get_parent(handle, &phandle)) | |
1217 | return -ENODEV; | |
1218 | ||
1219 | if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) || | |
1220 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) || | |
1221 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) || | |
1222 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp)))) | |
1223 | return 0; | |
1224 | ||
1225 | return -ENODEV; | |
1226 | } | |
1227 | ||
3620f2f2 FS |
1228 | /* |
1229 | * acpi_dock_match - see if a device has a _DCK method | |
1230 | */ | |
1231 | static int acpi_dock_match(struct acpi_device *device) | |
1232 | { | |
1233 | acpi_handle tmp; | |
1234 | return acpi_get_handle(device->handle, "_DCK", &tmp); | |
1235 | } | |
1236 | ||
620e112c | 1237 | const char *acpi_device_hid(struct acpi_device *device) |
15b8dd53 | 1238 | { |
7f47fa6c | 1239 | struct acpi_hardware_id *hid; |
15b8dd53 | 1240 | |
2b2ae7c7 TR |
1241 | if (list_empty(&device->pnp.ids)) |
1242 | return dummy_hid; | |
1243 | ||
7f47fa6c BH |
1244 | hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list); |
1245 | return hid->id; | |
1246 | } | |
1247 | EXPORT_SYMBOL(acpi_device_hid); | |
15b8dd53 | 1248 | |
7f47fa6c BH |
1249 | static void acpi_add_id(struct acpi_device *device, const char *dev_id) |
1250 | { | |
1251 | struct acpi_hardware_id *id; | |
15b8dd53 | 1252 | |
7f47fa6c BH |
1253 | id = kmalloc(sizeof(*id), GFP_KERNEL); |
1254 | if (!id) | |
1255 | return; | |
15b8dd53 | 1256 | |
581de59e | 1257 | id->id = kstrdup(dev_id, GFP_KERNEL); |
7f47fa6c BH |
1258 | if (!id->id) { |
1259 | kfree(id); | |
1260 | return; | |
15b8dd53 BM |
1261 | } |
1262 | ||
7f47fa6c | 1263 | list_add_tail(&id->list, &device->pnp.ids); |
15b8dd53 BM |
1264 | } |
1265 | ||
222e82ac DW |
1266 | /* |
1267 | * Old IBM workstations have a DSDT bug wherein the SMBus object | |
1268 | * lacks the SMBUS01 HID and the methods do not have the necessary "_" | |
1269 | * prefix. Work around this. | |
1270 | */ | |
1271 | static int acpi_ibm_smbus_match(struct acpi_device *device) | |
1272 | { | |
1273 | acpi_handle h_dummy; | |
1274 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
1275 | int result; | |
1276 | ||
1277 | if (!dmi_name_in_vendors("IBM")) | |
1278 | return -ENODEV; | |
1279 | ||
1280 | /* Look for SMBS object */ | |
1281 | result = acpi_get_name(device->handle, ACPI_SINGLE_NAME, &path); | |
1282 | if (result) | |
1283 | return result; | |
1284 | ||
1285 | if (strcmp("SMBS", path.pointer)) { | |
1286 | result = -ENODEV; | |
1287 | goto out; | |
1288 | } | |
1289 | ||
1290 | /* Does it have the necessary (but misnamed) methods? */ | |
1291 | result = -ENODEV; | |
1292 | if (ACPI_SUCCESS(acpi_get_handle(device->handle, "SBI", &h_dummy)) && | |
1293 | ACPI_SUCCESS(acpi_get_handle(device->handle, "SBR", &h_dummy)) && | |
1294 | ACPI_SUCCESS(acpi_get_handle(device->handle, "SBW", &h_dummy))) | |
1295 | result = 0; | |
1296 | out: | |
1297 | kfree(path.pointer); | |
1298 | return result; | |
1299 | } | |
1300 | ||
c7bcb4e9 | 1301 | static void acpi_device_set_id(struct acpi_device *device) |
1da177e4 | 1302 | { |
4be44fcd | 1303 | acpi_status status; |
57f3674f | 1304 | struct acpi_device_info *info; |
78e25fef | 1305 | struct acpi_pnp_device_id_list *cid_list; |
7f47fa6c | 1306 | int i; |
1da177e4 | 1307 | |
c7bcb4e9 | 1308 | switch (device->device_type) { |
1da177e4 | 1309 | case ACPI_BUS_TYPE_DEVICE: |
859ac9a4 | 1310 | if (ACPI_IS_ROOT_DEVICE(device)) { |
57f3674f | 1311 | acpi_add_id(device, ACPI_SYSTEM_HID); |
859ac9a4 BH |
1312 | break; |
1313 | } | |
1314 | ||
66b7ed40 | 1315 | status = acpi_get_object_info(device->handle, &info); |
1da177e4 | 1316 | if (ACPI_FAILURE(status)) { |
96b2dd1f | 1317 | printk(KERN_ERR PREFIX "%s: Error reading device info\n", __func__); |
1da177e4 LT |
1318 | return; |
1319 | } | |
1320 | ||
1da177e4 | 1321 | if (info->valid & ACPI_VALID_HID) |
57f3674f BH |
1322 | acpi_add_id(device, info->hardware_id.string); |
1323 | if (info->valid & ACPI_VALID_CID) { | |
15b8dd53 | 1324 | cid_list = &info->compatible_id_list; |
57f3674f BH |
1325 | for (i = 0; i < cid_list->count; i++) |
1326 | acpi_add_id(device, cid_list->ids[i].string); | |
1327 | } | |
1da177e4 LT |
1328 | if (info->valid & ACPI_VALID_ADR) { |
1329 | device->pnp.bus_address = info->address; | |
1330 | device->flags.bus_address = 1; | |
1331 | } | |
ccf78040 LZ |
1332 | if (info->valid & ACPI_VALID_UID) |
1333 | device->pnp.unique_id = kstrdup(info->unique_id.string, | |
1334 | GFP_KERNEL); | |
ae843332 | 1335 | |
a83893ae BH |
1336 | kfree(info); |
1337 | ||
57f3674f BH |
1338 | /* |
1339 | * Some devices don't reliably have _HIDs & _CIDs, so add | |
1340 | * synthetic HIDs to make sure drivers can find them. | |
1341 | */ | |
c3d6de69 | 1342 | if (acpi_is_video_device(device)) |
57f3674f | 1343 | acpi_add_id(device, ACPI_VIDEO_HID); |
3620f2f2 | 1344 | else if (ACPI_SUCCESS(acpi_bay_match(device))) |
57f3674f | 1345 | acpi_add_id(device, ACPI_BAY_HID); |
3620f2f2 | 1346 | else if (ACPI_SUCCESS(acpi_dock_match(device))) |
57f3674f | 1347 | acpi_add_id(device, ACPI_DOCK_HID); |
222e82ac DW |
1348 | else if (!acpi_ibm_smbus_match(device)) |
1349 | acpi_add_id(device, ACPI_SMBUS_IBM_HID); | |
b7b30de5 BH |
1350 | else if (!acpi_device_hid(device) && |
1351 | ACPI_IS_ROOT_DEVICE(device->parent)) { | |
1352 | acpi_add_id(device, ACPI_BUS_HID); /* \_SB, LNXSYBUS */ | |
1353 | strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME); | |
1354 | strcpy(device->pnp.device_class, ACPI_BUS_CLASS); | |
1355 | } | |
54735266 | 1356 | |
1da177e4 LT |
1357 | break; |
1358 | case ACPI_BUS_TYPE_POWER: | |
57f3674f | 1359 | acpi_add_id(device, ACPI_POWER_HID); |
1da177e4 LT |
1360 | break; |
1361 | case ACPI_BUS_TYPE_PROCESSOR: | |
57f3674f | 1362 | acpi_add_id(device, ACPI_PROCESSOR_OBJECT_HID); |
1da177e4 | 1363 | break; |
1da177e4 | 1364 | case ACPI_BUS_TYPE_THERMAL: |
57f3674f | 1365 | acpi_add_id(device, ACPI_THERMAL_HID); |
1da177e4 LT |
1366 | break; |
1367 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
57f3674f | 1368 | acpi_add_id(device, ACPI_BUTTON_HID_POWERF); |
1da177e4 LT |
1369 | break; |
1370 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
57f3674f | 1371 | acpi_add_id(device, ACPI_BUTTON_HID_SLEEPF); |
1da177e4 LT |
1372 | break; |
1373 | } | |
1da177e4 LT |
1374 | } |
1375 | ||
bc3b0772 | 1376 | static int acpi_device_set_context(struct acpi_device *device) |
1da177e4 | 1377 | { |
bc3b0772 BH |
1378 | acpi_status status; |
1379 | ||
1da177e4 LT |
1380 | /* |
1381 | * Context | |
1382 | * ------- | |
1383 | * Attach this 'struct acpi_device' to the ACPI object. This makes | |
bc3b0772 BH |
1384 | * resolutions from handle->device very efficient. Fixed hardware |
1385 | * devices have no handles, so we skip them. | |
1da177e4 | 1386 | */ |
bc3b0772 BH |
1387 | if (!device->handle) |
1388 | return 0; | |
1da177e4 | 1389 | |
bc3b0772 BH |
1390 | status = acpi_attach_data(device->handle, |
1391 | acpi_bus_data_handler, device); | |
1392 | if (ACPI_SUCCESS(status)) | |
1393 | return 0; | |
1394 | ||
1395 | printk(KERN_ERR PREFIX "Error attaching device data\n"); | |
1396 | return -ENODEV; | |
1da177e4 LT |
1397 | } |
1398 | ||
4be44fcd | 1399 | static int acpi_bus_remove(struct acpi_device *dev, int rmdevice) |
1da177e4 | 1400 | { |
1da177e4 | 1401 | if (!dev) |
d550d98d | 1402 | return -EINVAL; |
1da177e4 | 1403 | |
96333578 | 1404 | dev->removal_type = ACPI_BUS_REMOVAL_EJECT; |
1890a97a | 1405 | device_release_driver(&dev->dev); |
1da177e4 LT |
1406 | |
1407 | if (!rmdevice) | |
d550d98d | 1408 | return 0; |
1da177e4 | 1409 | |
2786f6e3 RZ |
1410 | /* |
1411 | * unbind _ADR-Based Devices when hot removal | |
1412 | */ | |
1da177e4 LT |
1413 | if (dev->flags.bus_address) { |
1414 | if ((dev->parent) && (dev->parent->ops.unbind)) | |
1415 | dev->parent->ops.unbind(dev); | |
1416 | } | |
1da177e4 LT |
1417 | acpi_device_unregister(dev, ACPI_BUS_REMOVAL_EJECT); |
1418 | ||
d550d98d | 1419 | return 0; |
1da177e4 LT |
1420 | } |
1421 | ||
805d410f RW |
1422 | /* |
1423 | * acpi_hot_add_bind - Bind _ADR-based devices on hot-add. | |
1424 | * @device: ACPI device node to bind. | |
1425 | */ | |
1426 | static void acpi_hot_add_bind(struct acpi_device *device) | |
1427 | { | |
1428 | if (device->flags.bus_address | |
1429 | && device->parent && device->parent->ops.bind) | |
1430 | device->parent->ops.bind(device); | |
1431 | } | |
1432 | ||
5c478f49 BH |
1433 | static int acpi_add_single_object(struct acpi_device **child, |
1434 | acpi_handle handle, int type, | |
778cbc1d | 1435 | unsigned long long sta, |
5c478f49 | 1436 | struct acpi_bus_ops *ops) |
1da177e4 | 1437 | { |
77c24888 BH |
1438 | int result; |
1439 | struct acpi_device *device; | |
29aaefa6 | 1440 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 1441 | |
36bcbec7 | 1442 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 1443 | if (!device) { |
6468463a | 1444 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 1445 | return -ENOMEM; |
1da177e4 | 1446 | } |
1da177e4 | 1447 | |
7f47fa6c | 1448 | INIT_LIST_HEAD(&device->pnp.ids); |
caaa6efb | 1449 | device->device_type = type; |
1da177e4 | 1450 | device->handle = handle; |
5c478f49 | 1451 | device->parent = acpi_bus_get_parent(handle); |
c4168bff | 1452 | device->bus_ops = *ops; /* workround for not call .start */ |
778cbc1d | 1453 | STRUCT_TO_INT(device->status) = sta; |
c4168bff | 1454 | |
c7bcb4e9 | 1455 | acpi_device_get_busid(device); |
1da177e4 LT |
1456 | |
1457 | /* | |
1458 | * Flags | |
1459 | * ----- | |
778cbc1d BH |
1460 | * Note that we only look for object handles -- cannot evaluate objects |
1461 | * until we know the device is present and properly initialized. | |
1da177e4 LT |
1462 | */ |
1463 | result = acpi_bus_get_flags(device); | |
1464 | if (result) | |
1465 | goto end; | |
1466 | ||
1da177e4 LT |
1467 | /* |
1468 | * Initialize Device | |
1469 | * ----------------- | |
1470 | * TBD: Synch with Core's enumeration/initialization process. | |
1471 | */ | |
c7bcb4e9 | 1472 | acpi_device_set_id(device); |
1da177e4 LT |
1473 | |
1474 | /* | |
1475 | * Power Management | |
1476 | * ---------------- | |
1477 | */ | |
1478 | if (device->flags.power_manageable) { | |
1479 | result = acpi_bus_get_power_flags(device); | |
1480 | if (result) | |
1481 | goto end; | |
1482 | } | |
1483 | ||
4be44fcd | 1484 | /* |
1da177e4 LT |
1485 | * Wakeup device management |
1486 | *----------------------- | |
1487 | */ | |
d57d09a4 | 1488 | acpi_bus_get_wakeup_device_flags(device); |
1da177e4 LT |
1489 | |
1490 | /* | |
1491 | * Performance Management | |
1492 | * ---------------------- | |
1493 | */ | |
1494 | if (device->flags.performance_manageable) { | |
1495 | result = acpi_bus_get_perf_flags(device); | |
1496 | if (result) | |
1497 | goto end; | |
1498 | } | |
1499 | ||
bc3b0772 | 1500 | if ((result = acpi_device_set_context(device))) |
f61f9258 | 1501 | goto end; |
1da177e4 | 1502 | |
66b7ed40 | 1503 | result = acpi_device_register(device); |
1da177e4 | 1504 | |
805d410f RW |
1505 | if (device->bus_ops.acpi_op_match) |
1506 | acpi_hot_add_bind(device); | |
1da177e4 | 1507 | |
0c526d96 | 1508 | end: |
29aaefa6 BH |
1509 | if (!result) { |
1510 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1511 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
1512 | "Adding %s [%s] parent %s\n", dev_name(&device->dev), | |
1513 | (char *) buffer.pointer, | |
1514 | device->parent ? dev_name(&device->parent->dev) : | |
1515 | "(null)")); | |
1516 | kfree(buffer.pointer); | |
1da177e4 | 1517 | *child = device; |
29aaefa6 | 1518 | } else |
718fb0de | 1519 | acpi_device_release(&device->dev); |
1da177e4 | 1520 | |
d550d98d | 1521 | return result; |
1da177e4 | 1522 | } |
1da177e4 | 1523 | |
778cbc1d BH |
1524 | #define ACPI_STA_DEFAULT (ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | \ |
1525 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING) | |
1526 | ||
bf325f95 RW |
1527 | static void acpi_bus_add_power_resource(acpi_handle handle) |
1528 | { | |
1529 | struct acpi_bus_ops ops = { | |
1530 | .acpi_op_add = 1, | |
1531 | .acpi_op_start = 1, | |
805d410f | 1532 | .acpi_op_match = 1, |
bf325f95 RW |
1533 | }; |
1534 | struct acpi_device *device = NULL; | |
1535 | ||
1536 | acpi_bus_get_device(handle, &device); | |
1537 | if (!device) | |
1538 | acpi_add_single_object(&device, handle, ACPI_BUS_TYPE_POWER, | |
1539 | ACPI_STA_DEFAULT, &ops); | |
1540 | } | |
1541 | ||
778cbc1d BH |
1542 | static int acpi_bus_type_and_status(acpi_handle handle, int *type, |
1543 | unsigned long long *sta) | |
1da177e4 | 1544 | { |
778cbc1d BH |
1545 | acpi_status status; |
1546 | acpi_object_type acpi_type; | |
1da177e4 | 1547 | |
778cbc1d | 1548 | status = acpi_get_type(handle, &acpi_type); |
51a85faf | 1549 | if (ACPI_FAILURE(status)) |
778cbc1d | 1550 | return -ENODEV; |
4be44fcd | 1551 | |
778cbc1d | 1552 | switch (acpi_type) { |
51a85faf BH |
1553 | case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */ |
1554 | case ACPI_TYPE_DEVICE: | |
778cbc1d BH |
1555 | *type = ACPI_BUS_TYPE_DEVICE; |
1556 | status = acpi_bus_get_status_handle(handle, sta); | |
1557 | if (ACPI_FAILURE(status)) | |
1558 | return -ENODEV; | |
51a85faf BH |
1559 | break; |
1560 | case ACPI_TYPE_PROCESSOR: | |
778cbc1d BH |
1561 | *type = ACPI_BUS_TYPE_PROCESSOR; |
1562 | status = acpi_bus_get_status_handle(handle, sta); | |
1563 | if (ACPI_FAILURE(status)) | |
1564 | return -ENODEV; | |
51a85faf BH |
1565 | break; |
1566 | case ACPI_TYPE_THERMAL: | |
778cbc1d BH |
1567 | *type = ACPI_BUS_TYPE_THERMAL; |
1568 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1569 | break; |
1570 | case ACPI_TYPE_POWER: | |
778cbc1d BH |
1571 | *type = ACPI_BUS_TYPE_POWER; |
1572 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1573 | break; |
1574 | default: | |
778cbc1d | 1575 | return -ENODEV; |
51a85faf | 1576 | } |
1da177e4 | 1577 | |
778cbc1d BH |
1578 | return 0; |
1579 | } | |
1580 | ||
1581 | static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl, | |
1582 | void *context, void **return_value) | |
1583 | { | |
1584 | struct acpi_bus_ops *ops = context; | |
805d410f | 1585 | struct acpi_device *device = NULL; |
778cbc1d BH |
1586 | int type; |
1587 | unsigned long long sta; | |
e3b87f8a | 1588 | acpi_status status; |
778cbc1d BH |
1589 | int result; |
1590 | ||
1591 | result = acpi_bus_type_and_status(handle, &type, &sta); | |
1592 | if (result) | |
1593 | return AE_OK; | |
1594 | ||
1595 | if (!(sta & ACPI_STA_DEVICE_PRESENT) && | |
b581a7f9 | 1596 | !(sta & ACPI_STA_DEVICE_FUNCTIONING)) { |
86e4e20e RW |
1597 | struct acpi_device_wakeup wakeup; |
1598 | acpi_handle temp; | |
1599 | ||
1600 | status = acpi_get_handle(handle, "_PRW", &temp); | |
1601 | if (ACPI_SUCCESS(status)) | |
1602 | acpi_bus_extract_wakeup_device_power_package(handle, | |
1603 | &wakeup); | |
778cbc1d | 1604 | return AE_CTRL_DEPTH; |
b581a7f9 | 1605 | } |
778cbc1d | 1606 | |
e3b87f8a | 1607 | acpi_bus_get_device(handle, &device); |
91e56878 | 1608 | if (ops->acpi_op_add && !device) { |
805d410f | 1609 | struct acpi_bus_ops add_ops = *ops; |
1da177e4 | 1610 | |
805d410f RW |
1611 | add_ops.acpi_op_match = 0; |
1612 | acpi_add_single_object(&device, handle, type, sta, &add_ops); | |
1613 | if (!device) | |
51a85faf | 1614 | return AE_CTRL_DEPTH; |
805d410f RW |
1615 | |
1616 | device->bus_ops.acpi_op_match = 1; | |
1617 | acpi_hot_add_bind(device); | |
51a85faf | 1618 | } |
1da177e4 | 1619 | |
51a85faf BH |
1620 | if (!*return_value) |
1621 | *return_value = device; | |
805d410f | 1622 | |
51a85faf BH |
1623 | return AE_OK; |
1624 | } | |
3fb02738 | 1625 | |
805d410f RW |
1626 | static acpi_status acpi_bus_probe_start(acpi_handle handle, u32 lvl, |
1627 | void *context, void **not_used) | |
1628 | { | |
1629 | struct acpi_bus_ops *ops = context; | |
1630 | acpi_status status = AE_OK; | |
1631 | struct acpi_device *device; | |
1632 | unsigned long long sta_not_used; | |
1633 | int type_not_used; | |
1634 | ||
1635 | /* | |
1636 | * Ignore errors ignored by acpi_bus_check_add() to avoid terminating | |
1637 | * namespace walks prematurely. | |
1638 | */ | |
1639 | if (acpi_bus_type_and_status(handle, &type_not_used, &sta_not_used)) | |
1640 | return AE_OK; | |
1641 | ||
1642 | if (acpi_bus_get_device(handle, &device)) | |
1643 | return AE_CTRL_DEPTH; | |
1644 | ||
1645 | if (ops->acpi_op_add) { | |
1646 | if (!acpi_match_device_ids(device, acpi_platform_device_ids)) { | |
1647 | /* This is a known good platform device. */ | |
1648 | acpi_create_platform_device(device); | |
1649 | } else if (device_attach(&device->dev)) { | |
1650 | status = AE_CTRL_DEPTH; | |
1651 | } | |
1652 | } else if (ops->acpi_op_start) { | |
1653 | if (ACPI_FAILURE(acpi_start_single_object(device))) | |
1654 | status = AE_CTRL_DEPTH; | |
1655 | } | |
1656 | return status; | |
1657 | } | |
1658 | ||
51a85faf BH |
1659 | static int acpi_bus_scan(acpi_handle handle, struct acpi_bus_ops *ops, |
1660 | struct acpi_device **child) | |
1661 | { | |
51a85faf | 1662 | void *device = NULL; |
805d410f RW |
1663 | acpi_status status; |
1664 | int ret = -ENODEV; | |
3fb02738 | 1665 | |
51a85faf BH |
1666 | status = acpi_bus_check_add(handle, 0, ops, &device); |
1667 | if (ACPI_SUCCESS(status)) | |
1668 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
2263576c | 1669 | acpi_bus_check_add, NULL, ops, &device); |
1da177e4 | 1670 | |
805d410f RW |
1671 | if (!device) |
1672 | goto out; | |
1673 | ||
1674 | ret = 0; | |
1675 | status = acpi_bus_probe_start(handle, 0, ops, NULL); | |
1676 | if (ACPI_SUCCESS(status)) | |
1677 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
1678 | acpi_bus_probe_start, NULL, ops, NULL); | |
1679 | ||
1680 | out: | |
51a85faf BH |
1681 | if (child) |
1682 | *child = device; | |
7779688f | 1683 | |
805d410f | 1684 | return ret; |
1da177e4 | 1685 | } |
1da177e4 | 1686 | |
7779688f TR |
1687 | /* |
1688 | * acpi_bus_add and acpi_bus_start | |
1689 | * | |
1690 | * scan a given ACPI tree and (probably recently hot-plugged) | |
1691 | * create and add or starts found devices. | |
1692 | * | |
1693 | * If no devices were found -ENODEV is returned which does not | |
1694 | * mean that this is a real error, there just have been no suitable | |
1695 | * ACPI objects in the table trunk from which the kernel could create | |
1696 | * a device and add/start an appropriate driver. | |
1697 | */ | |
1698 | ||
3fb02738 | 1699 | int |
4be44fcd LB |
1700 | acpi_bus_add(struct acpi_device **child, |
1701 | struct acpi_device *parent, acpi_handle handle, int type) | |
3fb02738 | 1702 | { |
3fb02738 RS |
1703 | struct acpi_bus_ops ops; |
1704 | ||
c4168bff LS |
1705 | memset(&ops, 0, sizeof(ops)); |
1706 | ops.acpi_op_add = 1; | |
3fb02738 | 1707 | |
7779688f | 1708 | return acpi_bus_scan(handle, &ops, child); |
3fb02738 RS |
1709 | } |
1710 | EXPORT_SYMBOL(acpi_bus_add); | |
1711 | ||
4be44fcd | 1712 | int acpi_bus_start(struct acpi_device *device) |
3fb02738 | 1713 | { |
3fb02738 | 1714 | struct acpi_bus_ops ops; |
a2100801 | 1715 | int result; |
3fb02738 | 1716 | |
d2f6650a TR |
1717 | if (!device) |
1718 | return -EINVAL; | |
1719 | ||
8e029bf0 BH |
1720 | memset(&ops, 0, sizeof(ops)); |
1721 | ops.acpi_op_start = 1; | |
3fb02738 | 1722 | |
a2100801 RW |
1723 | result = acpi_bus_scan(device->handle, &ops, NULL); |
1724 | ||
3a37898d | 1725 | acpi_update_all_gpes(); |
a2100801 RW |
1726 | |
1727 | return result; | |
3fb02738 RS |
1728 | } |
1729 | EXPORT_SYMBOL(acpi_bus_start); | |
1da177e4 | 1730 | |
ceaba663 | 1731 | int acpi_bus_trim(struct acpi_device *start, int rmdevice) |
1da177e4 | 1732 | { |
4be44fcd LB |
1733 | acpi_status status; |
1734 | struct acpi_device *parent, *child; | |
1735 | acpi_handle phandle, chandle; | |
1736 | acpi_object_type type; | |
1737 | u32 level = 1; | |
1738 | int err = 0; | |
1739 | ||
1740 | parent = start; | |
1da177e4 LT |
1741 | phandle = start->handle; |
1742 | child = chandle = NULL; | |
1743 | ||
1744 | while ((level > 0) && parent && (!err)) { | |
1745 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, | |
4be44fcd | 1746 | chandle, &chandle); |
1da177e4 LT |
1747 | |
1748 | /* | |
1749 | * If this scope is exhausted then move our way back up. | |
1750 | */ | |
1751 | if (ACPI_FAILURE(status)) { | |
1752 | level--; | |
1753 | chandle = phandle; | |
1754 | acpi_get_parent(phandle, &phandle); | |
1755 | child = parent; | |
1756 | parent = parent->parent; | |
1757 | ||
1758 | if (level == 0) | |
1759 | err = acpi_bus_remove(child, rmdevice); | |
1760 | else | |
1761 | err = acpi_bus_remove(child, 1); | |
1762 | ||
1763 | continue; | |
1764 | } | |
1765 | ||
1766 | status = acpi_get_type(chandle, &type); | |
1767 | if (ACPI_FAILURE(status)) { | |
1768 | continue; | |
1769 | } | |
1770 | /* | |
1771 | * If there is a device corresponding to chandle then | |
1772 | * parse it (depth-first). | |
1773 | */ | |
1774 | if (acpi_bus_get_device(chandle, &child) == 0) { | |
1775 | level++; | |
1776 | phandle = chandle; | |
1777 | chandle = NULL; | |
1778 | parent = child; | |
1779 | } | |
1780 | continue; | |
1781 | } | |
1782 | return err; | |
1783 | } | |
ceaba663 KA |
1784 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
1785 | ||
e8b945c9 | 1786 | static int acpi_bus_scan_fixed(void) |
1da177e4 | 1787 | { |
4be44fcd LB |
1788 | int result = 0; |
1789 | struct acpi_device *device = NULL; | |
c4168bff | 1790 | struct acpi_bus_ops ops; |
1da177e4 | 1791 | |
c4168bff LS |
1792 | memset(&ops, 0, sizeof(ops)); |
1793 | ops.acpi_op_add = 1; | |
1794 | ops.acpi_op_start = 1; | |
805d410f | 1795 | ops.acpi_op_match = 1; |
c4168bff | 1796 | |
1da177e4 LT |
1797 | /* |
1798 | * Enumerate all fixed-feature devices. | |
1799 | */ | |
cee324b1 | 1800 | if ((acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON) == 0) { |
5c478f49 | 1801 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1802 | ACPI_BUS_TYPE_POWER_BUTTON, |
778cbc1d | 1803 | ACPI_STA_DEFAULT, |
c4168bff | 1804 | &ops); |
c10d7a13 | 1805 | device_init_wakeup(&device->dev, true); |
3fb02738 | 1806 | } |
1da177e4 | 1807 | |
cee324b1 | 1808 | if ((acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON) == 0) { |
5c478f49 | 1809 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1810 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
778cbc1d | 1811 | ACPI_STA_DEFAULT, |
c4168bff | 1812 | &ops); |
3fb02738 | 1813 | } |
1da177e4 | 1814 | |
d550d98d | 1815 | return result; |
1da177e4 LT |
1816 | } |
1817 | ||
e747f274 | 1818 | int __init acpi_scan_init(void) |
1da177e4 LT |
1819 | { |
1820 | int result; | |
3fb02738 | 1821 | struct acpi_bus_ops ops; |
1da177e4 | 1822 | |
c4168bff LS |
1823 | memset(&ops, 0, sizeof(ops)); |
1824 | ops.acpi_op_add = 1; | |
1825 | ops.acpi_op_start = 1; | |
1da177e4 | 1826 | |
5b327265 PM |
1827 | result = bus_register(&acpi_bus_type); |
1828 | if (result) { | |
1829 | /* We don't want to quit even if we failed to add suspend/resume */ | |
1830 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
1831 | } | |
1832 | ||
97d9a9e9 RW |
1833 | acpi_power_init(); |
1834 | ||
1da177e4 LT |
1835 | /* |
1836 | * Enumerate devices in the ACPI namespace. | |
1837 | */ | |
51a85faf | 1838 | result = acpi_bus_scan(ACPI_ROOT_OBJECT, &ops, &acpi_root); |
c04209a7 | 1839 | |
c4168bff | 1840 | if (!result) |
adc08e20 | 1841 | result = acpi_bus_scan_fixed(); |
1da177e4 LT |
1842 | |
1843 | if (result) | |
1844 | acpi_device_unregister(acpi_root, ACPI_BUS_REMOVAL_NORMAL); | |
a2100801 | 1845 | else |
3a37898d | 1846 | acpi_update_all_gpes(); |
1da177e4 | 1847 | |
d550d98d | 1848 | return result; |
1da177e4 | 1849 | } |