Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * scan.c - support for transforming the ACPI namespace into individual objects | |
3 | */ | |
4 | ||
5 | #include <linux/module.h> | |
6 | #include <linux/init.h> | |
5a0e3ad6 | 7 | #include <linux/slab.h> |
9b6d97b6 | 8 | #include <linux/kernel.h> |
1da177e4 | 9 | #include <linux/acpi.h> |
74523c90 AK |
10 | #include <linux/signal.h> |
11 | #include <linux/kthread.h> | |
222e82ac | 12 | #include <linux/dmi.h> |
d1efe3c3 | 13 | #include <linux/nls.h> |
1da177e4 LT |
14 | |
15 | #include <acpi/acpi_drivers.h> | |
1da177e4 | 16 | |
e60cc7a6 BH |
17 | #include "internal.h" |
18 | ||
1da177e4 | 19 | #define _COMPONENT ACPI_BUS_COMPONENT |
f52fd66d | 20 | ACPI_MODULE_NAME("scan"); |
1da177e4 | 21 | #define STRUCT_TO_INT(s) (*((int*)&s)) |
4be44fcd | 22 | extern struct acpi_device *acpi_root; |
1da177e4 LT |
23 | |
24 | #define ACPI_BUS_CLASS "system_bus" | |
29b71a1c | 25 | #define ACPI_BUS_HID "LNXSYBUS" |
1da177e4 LT |
26 | #define ACPI_BUS_DEVICE_NAME "System Bus" |
27 | ||
859ac9a4 BH |
28 | #define ACPI_IS_ROOT_DEVICE(device) (!(device)->parent) |
29 | ||
620e112c | 30 | static const char *dummy_hid = "device"; |
2b2ae7c7 | 31 | |
1da177e4 | 32 | static LIST_HEAD(acpi_device_list); |
e49bd2dd | 33 | static LIST_HEAD(acpi_bus_id_list); |
c511cc19 | 34 | static DEFINE_MUTEX(acpi_scan_lock); |
ca589f94 | 35 | static LIST_HEAD(acpi_scan_handlers_list); |
9090589d | 36 | DEFINE_MUTEX(acpi_device_lock); |
1da177e4 LT |
37 | LIST_HEAD(acpi_wakeup_device_list); |
38 | ||
e49bd2dd | 39 | struct acpi_device_bus_id{ |
bb095854 | 40 | char bus_id[15]; |
e49bd2dd ZR |
41 | unsigned int instance_no; |
42 | struct list_head node; | |
1da177e4 | 43 | }; |
29b71a1c | 44 | |
ca589f94 RW |
45 | int acpi_scan_add_handler(struct acpi_scan_handler *handler) |
46 | { | |
47 | if (!handler || !handler->attach) | |
48 | return -EINVAL; | |
49 | ||
50 | list_add_tail(&handler->list_node, &acpi_scan_handlers_list); | |
51 | return 0; | |
52 | } | |
53 | ||
29b71a1c TR |
54 | /* |
55 | * Creates hid/cid(s) string needed for modalias and uevent | |
56 | * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: | |
57 | * char *modalias: "acpi:IBM0001:ACPI0001" | |
58 | */ | |
b3e572d2 AB |
59 | static int create_modalias(struct acpi_device *acpi_dev, char *modalias, |
60 | int size) | |
61 | { | |
29b71a1c | 62 | int len; |
5c9fcb5d | 63 | int count; |
7f47fa6c | 64 | struct acpi_hardware_id *id; |
29b71a1c | 65 | |
2b2ae7c7 TR |
66 | if (list_empty(&acpi_dev->pnp.ids)) |
67 | return 0; | |
68 | ||
5c9fcb5d | 69 | len = snprintf(modalias, size, "acpi:"); |
29b71a1c TR |
70 | size -= len; |
71 | ||
7f47fa6c BH |
72 | list_for_each_entry(id, &acpi_dev->pnp.ids, list) { |
73 | count = snprintf(&modalias[len], size, "%s:", id->id); | |
5c9fcb5d ZR |
74 | if (count < 0 || count >= size) |
75 | return -EINVAL; | |
76 | len += count; | |
77 | size -= count; | |
78 | } | |
79 | ||
29b71a1c TR |
80 | modalias[len] = '\0'; |
81 | return len; | |
82 | } | |
83 | ||
84 | static ssize_t | |
85 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
86 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
87 | int len; | |
88 | ||
89 | /* Device has no HID and no CID or string is >1024 */ | |
90 | len = create_modalias(acpi_dev, buf, 1024); | |
91 | if (len <= 0) | |
92 | return 0; | |
93 | buf[len++] = '\n'; | |
94 | return len; | |
95 | } | |
96 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); | |
97 | ||
c4753e57 TK |
98 | /** |
99 | * acpi_bus_hot_remove_device: hot-remove a device and its children | |
100 | * @context: struct acpi_eject_event pointer (freed in this func) | |
101 | * | |
102 | * Hot-remove a device and its children. This function frees up the | |
103 | * memory space passed by arg context, so that the caller may call | |
104 | * this function asynchronously through acpi_os_hotplug_execute(). | |
105 | */ | |
106 | void acpi_bus_hot_remove_device(void *context) | |
1da177e4 | 107 | { |
c4753e57 | 108 | struct acpi_eject_event *ej_event = (struct acpi_eject_event *) context; |
5993c467 YL |
109 | struct acpi_device *device = ej_event->device; |
110 | acpi_handle handle = device->handle; | |
b3c450c3 | 111 | acpi_handle temp; |
1da177e4 LT |
112 | struct acpi_object_list arg_list; |
113 | union acpi_object arg; | |
114 | acpi_status status = AE_OK; | |
c4753e57 | 115 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; /* default */ |
1da177e4 | 116 | |
26d46867 | 117 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
0794469d | 118 | "Hot-removing device %s...\n", dev_name(&device->dev))); |
26d46867 | 119 | |
bfee26db RW |
120 | acpi_bus_trim(device); |
121 | /* Device node has been released. */ | |
b3c450c3 TK |
122 | device = NULL; |
123 | ||
26d46867 ZR |
124 | /* power off device */ |
125 | status = acpi_evaluate_object(handle, "_PS3", NULL, NULL); | |
126 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) | |
55ac9a01 LM |
127 | printk(KERN_WARNING PREFIX |
128 | "Power-off device failed\n"); | |
26d46867 | 129 | |
b3c450c3 | 130 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_LCK", &temp))) { |
1da177e4 LT |
131 | arg_list.count = 1; |
132 | arg_list.pointer = &arg; | |
133 | arg.type = ACPI_TYPE_INTEGER; | |
134 | arg.integer.value = 0; | |
135 | acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); | |
136 | } | |
1da177e4 | 137 | |
1da177e4 LT |
138 | arg_list.count = 1; |
139 | arg_list.pointer = &arg; | |
140 | arg.type = ACPI_TYPE_INTEGER; | |
141 | arg.integer.value = 1; | |
1da177e4 | 142 | |
1da177e4 LT |
143 | /* |
144 | * TBD: _EJD support. | |
145 | */ | |
1da177e4 | 146 | status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); |
c4753e57 TK |
147 | if (ACPI_FAILURE(status)) { |
148 | if (status != AE_NOT_FOUND) | |
149 | printk(KERN_WARNING PREFIX | |
150 | "Eject device failed\n"); | |
151 | goto err_out; | |
152 | } | |
1da177e4 | 153 | |
c4753e57 TK |
154 | kfree(context); |
155 | return; | |
1da177e4 | 156 | |
c4753e57 TK |
157 | err_out: |
158 | /* Inform firmware the hot-remove operation has completed w/ error */ | |
159 | (void) acpi_evaluate_hotplug_ost(handle, | |
160 | ej_event->event, ost_code, NULL); | |
161 | kfree(context); | |
c8d72a5e | 162 | return; |
1da177e4 | 163 | } |
61622acc | 164 | EXPORT_SYMBOL(acpi_bus_hot_remove_device); |
1da177e4 | 165 | |
836aedb1 RW |
166 | static ssize_t real_power_state_show(struct device *dev, |
167 | struct device_attribute *attr, char *buf) | |
168 | { | |
169 | struct acpi_device *adev = to_acpi_device(dev); | |
170 | int state; | |
171 | int ret; | |
172 | ||
173 | ret = acpi_device_get_power(adev, &state); | |
174 | if (ret) | |
175 | return ret; | |
176 | ||
177 | return sprintf(buf, "%s\n", acpi_power_state_string(state)); | |
178 | } | |
179 | ||
180 | static DEVICE_ATTR(real_power_state, 0444, real_power_state_show, NULL); | |
181 | ||
182 | static ssize_t power_state_show(struct device *dev, | |
183 | struct device_attribute *attr, char *buf) | |
184 | { | |
185 | struct acpi_device *adev = to_acpi_device(dev); | |
186 | ||
187 | return sprintf(buf, "%s\n", acpi_power_state_string(adev->power.state)); | |
188 | } | |
189 | ||
190 | static DEVICE_ATTR(power_state, 0444, power_state_show, NULL); | |
191 | ||
1da177e4 | 192 | static ssize_t |
f883d9db PM |
193 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
194 | const char *buf, size_t count) | |
1da177e4 | 195 | { |
4be44fcd | 196 | int ret = count; |
4be44fcd | 197 | acpi_status status; |
4be44fcd | 198 | acpi_object_type type = 0; |
f883d9db | 199 | struct acpi_device *acpi_device = to_acpi_device(d); |
c4753e57 | 200 | struct acpi_eject_event *ej_event; |
1da177e4 | 201 | |
1da177e4 LT |
202 | if ((!count) || (buf[0] != '1')) { |
203 | return -EINVAL; | |
204 | } | |
1da177e4 | 205 | #ifndef FORCE_EJECT |
f883d9db | 206 | if (acpi_device->driver == NULL) { |
1da177e4 LT |
207 | ret = -ENODEV; |
208 | goto err; | |
209 | } | |
210 | #endif | |
f883d9db PM |
211 | status = acpi_get_type(acpi_device->handle, &type); |
212 | if (ACPI_FAILURE(status) || (!acpi_device->flags.ejectable)) { | |
1da177e4 LT |
213 | ret = -ENODEV; |
214 | goto err; | |
215 | } | |
1da177e4 | 216 | |
c4753e57 TK |
217 | ej_event = kmalloc(sizeof(*ej_event), GFP_KERNEL); |
218 | if (!ej_event) { | |
219 | ret = -ENOMEM; | |
220 | goto err; | |
221 | } | |
222 | ||
5993c467 | 223 | ej_event->device = acpi_device; |
c4753e57 TK |
224 | if (acpi_device->flags.eject_pending) { |
225 | /* event originated from ACPI eject notification */ | |
226 | ej_event->event = ACPI_NOTIFY_EJECT_REQUEST; | |
227 | acpi_device->flags.eject_pending = 0; | |
228 | } else { | |
229 | /* event originated from user */ | |
230 | ej_event->event = ACPI_OST_EC_OSPM_EJECT; | |
5993c467 | 231 | (void) acpi_evaluate_hotplug_ost(acpi_device->handle, |
c4753e57 TK |
232 | ej_event->event, ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); |
233 | } | |
234 | ||
235 | acpi_os_hotplug_execute(acpi_bus_hot_remove_device, (void *)ej_event); | |
74523c90 | 236 | err: |
1da177e4 | 237 | return ret; |
1da177e4 LT |
238 | } |
239 | ||
f883d9db | 240 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
1da177e4 | 241 | |
e49bd2dd ZR |
242 | static ssize_t |
243 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
244 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1da177e4 | 245 | |
ea8d82fd | 246 | return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev)); |
1da177e4 | 247 | } |
e49bd2dd | 248 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
1da177e4 | 249 | |
923d4a45 LZ |
250 | static ssize_t acpi_device_uid_show(struct device *dev, |
251 | struct device_attribute *attr, char *buf) | |
252 | { | |
253 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
254 | ||
255 | return sprintf(buf, "%s\n", acpi_dev->pnp.unique_id); | |
256 | } | |
257 | static DEVICE_ATTR(uid, 0444, acpi_device_uid_show, NULL); | |
258 | ||
259 | static ssize_t acpi_device_adr_show(struct device *dev, | |
260 | struct device_attribute *attr, char *buf) | |
261 | { | |
262 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
263 | ||
264 | return sprintf(buf, "0x%08x\n", | |
265 | (unsigned int)(acpi_dev->pnp.bus_address)); | |
266 | } | |
267 | static DEVICE_ATTR(adr, 0444, acpi_device_adr_show, NULL); | |
268 | ||
e49bd2dd ZR |
269 | static ssize_t |
270 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
271 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
272 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
273 | int result; | |
1da177e4 | 274 | |
e49bd2dd | 275 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
0c526d96 | 276 | if (result) |
e49bd2dd | 277 | goto end; |
1da177e4 | 278 | |
e49bd2dd ZR |
279 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
280 | kfree(path.pointer); | |
0c526d96 | 281 | end: |
e49bd2dd | 282 | return result; |
1da177e4 | 283 | } |
e49bd2dd | 284 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
1da177e4 | 285 | |
d1efe3c3 LO |
286 | /* sysfs file that shows description text from the ACPI _STR method */ |
287 | static ssize_t description_show(struct device *dev, | |
288 | struct device_attribute *attr, | |
289 | char *buf) { | |
290 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
291 | int result; | |
292 | ||
293 | if (acpi_dev->pnp.str_obj == NULL) | |
294 | return 0; | |
295 | ||
296 | /* | |
297 | * The _STR object contains a Unicode identifier for a device. | |
298 | * We need to convert to utf-8 so it can be displayed. | |
299 | */ | |
300 | result = utf16s_to_utf8s( | |
301 | (wchar_t *)acpi_dev->pnp.str_obj->buffer.pointer, | |
302 | acpi_dev->pnp.str_obj->buffer.length, | |
303 | UTF16_LITTLE_ENDIAN, buf, | |
304 | PAGE_SIZE); | |
305 | ||
306 | buf[result++] = '\n'; | |
307 | ||
308 | return result; | |
309 | } | |
310 | static DEVICE_ATTR(description, 0444, description_show, NULL); | |
311 | ||
bb74ac23 YI |
312 | static ssize_t |
313 | acpi_device_sun_show(struct device *dev, struct device_attribute *attr, | |
314 | char *buf) { | |
315 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
316 | ||
317 | return sprintf(buf, "%lu\n", acpi_dev->pnp.sun); | |
318 | } | |
319 | static DEVICE_ATTR(sun, 0444, acpi_device_sun_show, NULL); | |
320 | ||
e49bd2dd | 321 | static int acpi_device_setup_files(struct acpi_device *dev) |
1da177e4 | 322 | { |
d1efe3c3 | 323 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
f883d9db PM |
324 | acpi_status status; |
325 | acpi_handle temp; | |
bb74ac23 | 326 | unsigned long long sun; |
e49bd2dd | 327 | int result = 0; |
1da177e4 LT |
328 | |
329 | /* | |
e49bd2dd | 330 | * Devices gotten from FADT don't have a "path" attribute |
1da177e4 | 331 | */ |
0c526d96 | 332 | if (dev->handle) { |
e49bd2dd | 333 | result = device_create_file(&dev->dev, &dev_attr_path); |
0c526d96 | 334 | if (result) |
e49bd2dd | 335 | goto end; |
1da177e4 LT |
336 | } |
337 | ||
2b2ae7c7 TR |
338 | if (!list_empty(&dev->pnp.ids)) { |
339 | result = device_create_file(&dev->dev, &dev_attr_hid); | |
340 | if (result) | |
341 | goto end; | |
1da177e4 | 342 | |
2b2ae7c7 TR |
343 | result = device_create_file(&dev->dev, &dev_attr_modalias); |
344 | if (result) | |
345 | goto end; | |
346 | } | |
29b71a1c | 347 | |
d1efe3c3 LO |
348 | /* |
349 | * If device has _STR, 'description' file is created | |
350 | */ | |
351 | status = acpi_get_handle(dev->handle, "_STR", &temp); | |
352 | if (ACPI_SUCCESS(status)) { | |
353 | status = acpi_evaluate_object(dev->handle, "_STR", | |
354 | NULL, &buffer); | |
355 | if (ACPI_FAILURE(status)) | |
356 | buffer.pointer = NULL; | |
357 | dev->pnp.str_obj = buffer.pointer; | |
358 | result = device_create_file(&dev->dev, &dev_attr_description); | |
359 | if (result) | |
360 | goto end; | |
361 | } | |
362 | ||
923d4a45 LZ |
363 | if (dev->flags.bus_address) |
364 | result = device_create_file(&dev->dev, &dev_attr_adr); | |
365 | if (dev->pnp.unique_id) | |
366 | result = device_create_file(&dev->dev, &dev_attr_uid); | |
367 | ||
bb74ac23 YI |
368 | status = acpi_evaluate_integer(dev->handle, "_SUN", NULL, &sun); |
369 | if (ACPI_SUCCESS(status)) { | |
370 | dev->pnp.sun = (unsigned long)sun; | |
371 | result = device_create_file(&dev->dev, &dev_attr_sun); | |
372 | if (result) | |
373 | goto end; | |
374 | } else { | |
375 | dev->pnp.sun = (unsigned long)-1; | |
376 | } | |
377 | ||
e49bd2dd ZR |
378 | /* |
379 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
380 | * hot-removal function from userland. | |
381 | */ | |
f883d9db | 382 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); |
836aedb1 | 383 | if (ACPI_SUCCESS(status)) { |
e49bd2dd | 384 | result = device_create_file(&dev->dev, &dev_attr_eject); |
836aedb1 RW |
385 | if (result) |
386 | return result; | |
387 | } | |
388 | ||
389 | if (dev->flags.power_manageable) { | |
390 | result = device_create_file(&dev->dev, &dev_attr_power_state); | |
391 | if (result) | |
392 | return result; | |
393 | ||
394 | if (dev->power.flags.power_resources) | |
395 | result = device_create_file(&dev->dev, | |
396 | &dev_attr_real_power_state); | |
397 | } | |
398 | ||
0c526d96 | 399 | end: |
e49bd2dd | 400 | return result; |
1da177e4 LT |
401 | } |
402 | ||
f883d9db | 403 | static void acpi_device_remove_files(struct acpi_device *dev) |
1da177e4 | 404 | { |
f883d9db PM |
405 | acpi_status status; |
406 | acpi_handle temp; | |
1da177e4 | 407 | |
836aedb1 RW |
408 | if (dev->flags.power_manageable) { |
409 | device_remove_file(&dev->dev, &dev_attr_power_state); | |
410 | if (dev->power.flags.power_resources) | |
411 | device_remove_file(&dev->dev, | |
412 | &dev_attr_real_power_state); | |
413 | } | |
414 | ||
f883d9db | 415 | /* |
d1efe3c3 LO |
416 | * If device has _STR, remove 'description' file |
417 | */ | |
418 | status = acpi_get_handle(dev->handle, "_STR", &temp); | |
419 | if (ACPI_SUCCESS(status)) { | |
420 | kfree(dev->pnp.str_obj); | |
421 | device_remove_file(&dev->dev, &dev_attr_description); | |
422 | } | |
423 | /* | |
424 | * If device has _EJ0, remove 'eject' file. | |
f883d9db PM |
425 | */ |
426 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); | |
427 | if (ACPI_SUCCESS(status)) | |
428 | device_remove_file(&dev->dev, &dev_attr_eject); | |
1da177e4 | 429 | |
bb74ac23 YI |
430 | status = acpi_get_handle(dev->handle, "_SUN", &temp); |
431 | if (ACPI_SUCCESS(status)) | |
432 | device_remove_file(&dev->dev, &dev_attr_sun); | |
433 | ||
923d4a45 LZ |
434 | if (dev->pnp.unique_id) |
435 | device_remove_file(&dev->dev, &dev_attr_uid); | |
436 | if (dev->flags.bus_address) | |
437 | device_remove_file(&dev->dev, &dev_attr_adr); | |
1131b938 BH |
438 | device_remove_file(&dev->dev, &dev_attr_modalias); |
439 | device_remove_file(&dev->dev, &dev_attr_hid); | |
0c526d96 | 440 | if (dev->handle) |
e49bd2dd | 441 | device_remove_file(&dev->dev, &dev_attr_path); |
1da177e4 | 442 | } |
1da177e4 | 443 | /* -------------------------------------------------------------------------- |
9e89dde2 | 444 | ACPI Bus operations |
1da177e4 | 445 | -------------------------------------------------------------------------- */ |
29b71a1c | 446 | |
cf761af9 MW |
447 | static const struct acpi_device_id *__acpi_match_device( |
448 | struct acpi_device *device, const struct acpi_device_id *ids) | |
29b71a1c TR |
449 | { |
450 | const struct acpi_device_id *id; | |
7f47fa6c | 451 | struct acpi_hardware_id *hwid; |
29b71a1c | 452 | |
39a0ad87 ZY |
453 | /* |
454 | * If the device is not present, it is unnecessary to load device | |
455 | * driver for it. | |
456 | */ | |
457 | if (!device->status.present) | |
cf761af9 | 458 | return NULL; |
39a0ad87 | 459 | |
7f47fa6c BH |
460 | for (id = ids; id->id[0]; id++) |
461 | list_for_each_entry(hwid, &device->pnp.ids, list) | |
462 | if (!strcmp((char *) id->id, hwid->id)) | |
cf761af9 MW |
463 | return id; |
464 | ||
465 | return NULL; | |
466 | } | |
467 | ||
468 | /** | |
469 | * acpi_match_device - Match a struct device against a given list of ACPI IDs | |
470 | * @ids: Array of struct acpi_device_id object to match against. | |
471 | * @dev: The device structure to match. | |
472 | * | |
473 | * Check if @dev has a valid ACPI handle and if there is a struct acpi_device | |
474 | * object for that handle and use that object to match against a given list of | |
475 | * device IDs. | |
476 | * | |
477 | * Return a pointer to the first matching ID on success or %NULL on failure. | |
478 | */ | |
479 | const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids, | |
480 | const struct device *dev) | |
481 | { | |
482 | struct acpi_device *adev; | |
483 | ||
95f8a082 RW |
484 | if (!ids || !ACPI_HANDLE(dev) |
485 | || ACPI_FAILURE(acpi_bus_get_device(ACPI_HANDLE(dev), &adev))) | |
cf761af9 MW |
486 | return NULL; |
487 | ||
488 | return __acpi_match_device(adev, ids); | |
489 | } | |
490 | EXPORT_SYMBOL_GPL(acpi_match_device); | |
29b71a1c | 491 | |
cf761af9 MW |
492 | int acpi_match_device_ids(struct acpi_device *device, |
493 | const struct acpi_device_id *ids) | |
494 | { | |
495 | return __acpi_match_device(device, ids) ? 0 : -ENOENT; | |
29b71a1c TR |
496 | } |
497 | EXPORT_SYMBOL(acpi_match_device_ids); | |
498 | ||
82c7d5ef | 499 | void acpi_free_ids(struct acpi_device *device) |
7f47fa6c BH |
500 | { |
501 | struct acpi_hardware_id *id, *tmp; | |
502 | ||
503 | list_for_each_entry_safe(id, tmp, &device->pnp.ids, list) { | |
504 | kfree(id->id); | |
505 | kfree(id); | |
506 | } | |
d43e167d | 507 | kfree(device->pnp.unique_id); |
7f47fa6c BH |
508 | } |
509 | ||
0b224527 RW |
510 | static void acpi_free_power_resources_lists(struct acpi_device *device) |
511 | { | |
512 | int i; | |
513 | ||
993cbe59 RW |
514 | if (device->wakeup.flags.valid) |
515 | acpi_power_resources_list_free(&device->wakeup.resources); | |
516 | ||
0b224527 RW |
517 | if (!device->flags.power_manageable) |
518 | return; | |
519 | ||
520 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) { | |
521 | struct acpi_device_power_state *ps = &device->power.states[i]; | |
522 | acpi_power_resources_list_free(&ps->resources); | |
523 | } | |
7f47fa6c BH |
524 | } |
525 | ||
1890a97a | 526 | static void acpi_device_release(struct device *dev) |
1da177e4 | 527 | { |
1890a97a | 528 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 529 | |
7f47fa6c | 530 | acpi_free_ids(acpi_dev); |
0b224527 | 531 | acpi_free_power_resources_lists(acpi_dev); |
1890a97a | 532 | kfree(acpi_dev); |
1da177e4 LT |
533 | } |
534 | ||
5d9464a4 | 535 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 536 | { |
5d9464a4 PM |
537 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
538 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
1da177e4 | 539 | |
209d3b17 | 540 | return acpi_dev->flags.match_driver |
805d410f | 541 | && !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
5d9464a4 | 542 | } |
1da177e4 | 543 | |
7eff2e7a | 544 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 | 545 | { |
5d9464a4 | 546 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
7eff2e7a | 547 | int len; |
5d9464a4 | 548 | |
2b2ae7c7 TR |
549 | if (list_empty(&acpi_dev->pnp.ids)) |
550 | return 0; | |
551 | ||
7eff2e7a KS |
552 | if (add_uevent_var(env, "MODALIAS=")) |
553 | return -ENOMEM; | |
554 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], | |
555 | sizeof(env->buf) - env->buflen); | |
556 | if (len >= (sizeof(env->buf) - env->buflen)) | |
557 | return -ENOMEM; | |
558 | env->buflen += len; | |
9e89dde2 | 559 | return 0; |
1da177e4 LT |
560 | } |
561 | ||
46ec8598 BH |
562 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
563 | { | |
564 | struct acpi_device *device = data; | |
565 | ||
566 | device->driver->ops.notify(device, event); | |
567 | } | |
568 | ||
569 | static acpi_status acpi_device_notify_fixed(void *data) | |
570 | { | |
571 | struct acpi_device *device = data; | |
572 | ||
53de5356 BH |
573 | /* Fixed hardware devices have no handles */ |
574 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); | |
46ec8598 BH |
575 | return AE_OK; |
576 | } | |
577 | ||
578 | static int acpi_device_install_notify_handler(struct acpi_device *device) | |
579 | { | |
580 | acpi_status status; | |
46ec8598 | 581 | |
ccba2a36 | 582 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
583 | status = |
584 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
585 | acpi_device_notify_fixed, | |
586 | device); | |
ccba2a36 | 587 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
588 | status = |
589 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
590 | acpi_device_notify_fixed, | |
591 | device); | |
592 | else | |
593 | status = acpi_install_notify_handler(device->handle, | |
594 | ACPI_DEVICE_NOTIFY, | |
595 | acpi_device_notify, | |
596 | device); | |
597 | ||
598 | if (ACPI_FAILURE(status)) | |
599 | return -EINVAL; | |
600 | return 0; | |
601 | } | |
602 | ||
603 | static void acpi_device_remove_notify_handler(struct acpi_device *device) | |
604 | { | |
ccba2a36 | 605 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
606 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, |
607 | acpi_device_notify_fixed); | |
ccba2a36 | 608 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
609 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, |
610 | acpi_device_notify_fixed); | |
611 | else | |
612 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, | |
613 | acpi_device_notify); | |
614 | } | |
615 | ||
5d9464a4 | 616 | static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *); |
5d9464a4 | 617 | static int acpi_device_probe(struct device * dev) |
1da177e4 | 618 | { |
5d9464a4 PM |
619 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
620 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
621 | int ret; | |
622 | ||
623 | ret = acpi_bus_driver_init(acpi_dev, acpi_drv); | |
624 | if (!ret) { | |
46ec8598 BH |
625 | if (acpi_drv->ops.notify) { |
626 | ret = acpi_device_install_notify_handler(acpi_dev); | |
627 | if (ret) { | |
46ec8598 | 628 | if (acpi_drv->ops.remove) |
51fac838 | 629 | acpi_drv->ops.remove(acpi_dev); |
46ec8598 BH |
630 | return ret; |
631 | } | |
632 | } | |
633 | ||
5d9464a4 PM |
634 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
635 | "Found driver [%s] for device [%s]\n", | |
636 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
637 | get_device(dev); | |
638 | } | |
639 | return ret; | |
640 | } | |
1da177e4 | 641 | |
5d9464a4 PM |
642 | static int acpi_device_remove(struct device * dev) |
643 | { | |
644 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
645 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
646 | ||
647 | if (acpi_drv) { | |
46ec8598 BH |
648 | if (acpi_drv->ops.notify) |
649 | acpi_device_remove_notify_handler(acpi_dev); | |
5d9464a4 | 650 | if (acpi_drv->ops.remove) |
51fac838 | 651 | acpi_drv->ops.remove(acpi_dev); |
1da177e4 | 652 | } |
5d9464a4 | 653 | acpi_dev->driver = NULL; |
db89b4f0 | 654 | acpi_dev->driver_data = NULL; |
1da177e4 | 655 | |
5d9464a4 | 656 | put_device(dev); |
9e89dde2 ZR |
657 | return 0; |
658 | } | |
1da177e4 | 659 | |
55955aad | 660 | struct bus_type acpi_bus_type = { |
9e89dde2 | 661 | .name = "acpi", |
5d9464a4 PM |
662 | .match = acpi_bus_match, |
663 | .probe = acpi_device_probe, | |
664 | .remove = acpi_device_remove, | |
665 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
666 | }; |
667 | ||
cf860be6 RW |
668 | int acpi_device_add(struct acpi_device *device, |
669 | void (*release)(struct device *)) | |
1da177e4 | 670 | { |
4be44fcd | 671 | int result; |
e49bd2dd ZR |
672 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
673 | int found = 0; | |
66b7ed40 | 674 | |
d43e167d RW |
675 | if (device->handle) { |
676 | acpi_status status; | |
677 | ||
678 | status = acpi_attach_data(device->handle, acpi_bus_data_handler, | |
679 | device); | |
680 | if (ACPI_FAILURE(status)) { | |
681 | acpi_handle_err(device->handle, | |
682 | "Unable to attach device data\n"); | |
683 | return -ENODEV; | |
684 | } | |
685 | } | |
686 | ||
9e89dde2 ZR |
687 | /* |
688 | * Linkage | |
689 | * ------- | |
690 | * Link this device to its parent and siblings. | |
691 | */ | |
692 | INIT_LIST_HEAD(&device->children); | |
693 | INIT_LIST_HEAD(&device->node); | |
9e89dde2 | 694 | INIT_LIST_HEAD(&device->wakeup_list); |
1033f904 LT |
695 | INIT_LIST_HEAD(&device->physical_node_list); |
696 | mutex_init(&device->physical_node_lock); | |
bc9b6407 | 697 | INIT_LIST_HEAD(&device->power_dependent); |
1da177e4 | 698 | |
e49bd2dd ZR |
699 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
700 | if (!new_bus_id) { | |
d43e167d RW |
701 | pr_err(PREFIX "Memory allocation error\n"); |
702 | result = -ENOMEM; | |
703 | goto err_detach; | |
1da177e4 | 704 | } |
e49bd2dd | 705 | |
9090589d | 706 | mutex_lock(&acpi_device_lock); |
e49bd2dd ZR |
707 | /* |
708 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
709 | * If failed, create one and link it into acpi_bus_id_list | |
710 | */ | |
711 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
1131b938 BH |
712 | if (!strcmp(acpi_device_bus_id->bus_id, |
713 | acpi_device_hid(device))) { | |
714 | acpi_device_bus_id->instance_no++; | |
e49bd2dd ZR |
715 | found = 1; |
716 | kfree(new_bus_id); | |
717 | break; | |
718 | } | |
1da177e4 | 719 | } |
0c526d96 | 720 | if (!found) { |
e49bd2dd | 721 | acpi_device_bus_id = new_bus_id; |
1131b938 | 722 | strcpy(acpi_device_bus_id->bus_id, acpi_device_hid(device)); |
e49bd2dd ZR |
723 | acpi_device_bus_id->instance_no = 0; |
724 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 725 | } |
0794469d | 726 | dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 727 | |
33b57150 | 728 | if (device->parent) |
9e89dde2 | 729 | list_add_tail(&device->node, &device->parent->children); |
33b57150 | 730 | |
9e89dde2 ZR |
731 | if (device->wakeup.flags.valid) |
732 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
9090589d | 733 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 734 | |
1890a97a | 735 | if (device->parent) |
66b7ed40 | 736 | device->dev.parent = &device->parent->dev; |
1890a97a | 737 | device->dev.bus = &acpi_bus_type; |
82c7d5ef | 738 | device->dev.release = release; |
cf860be6 | 739 | result = device_add(&device->dev); |
0c526d96 | 740 | if (result) { |
8b12b922 | 741 | dev_err(&device->dev, "Error registering device\n"); |
d43e167d | 742 | goto err; |
1da177e4 | 743 | } |
1da177e4 | 744 | |
e49bd2dd | 745 | result = acpi_device_setup_files(device); |
0c526d96 | 746 | if (result) |
0794469d KS |
747 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
748 | dev_name(&device->dev)); | |
1da177e4 | 749 | |
96333578 | 750 | device->removal_type = ACPI_BUS_REMOVAL_NORMAL; |
1da177e4 | 751 | return 0; |
d43e167d RW |
752 | |
753 | err: | |
9090589d | 754 | mutex_lock(&acpi_device_lock); |
33b57150 | 755 | if (device->parent) |
e49bd2dd | 756 | list_del(&device->node); |
e49bd2dd | 757 | list_del(&device->wakeup_list); |
9090589d | 758 | mutex_unlock(&acpi_device_lock); |
d43e167d RW |
759 | |
760 | err_detach: | |
761 | acpi_detach_data(device->handle, acpi_bus_data_handler); | |
e49bd2dd | 762 | return result; |
1da177e4 LT |
763 | } |
764 | ||
b17b537a | 765 | static void acpi_device_unregister(struct acpi_device *device) |
9e89dde2 | 766 | { |
9090589d | 767 | mutex_lock(&acpi_device_lock); |
33b57150 | 768 | if (device->parent) |
9e89dde2 | 769 | list_del(&device->node); |
1da177e4 | 770 | |
9e89dde2 | 771 | list_del(&device->wakeup_list); |
9090589d | 772 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 773 | |
9e89dde2 | 774 | acpi_detach_data(device->handle, acpi_bus_data_handler); |
1890a97a | 775 | |
bc9b6407 | 776 | acpi_power_add_remove_device(device, false); |
f883d9db | 777 | acpi_device_remove_files(device); |
b1c0f99b RW |
778 | if (device->remove) |
779 | device->remove(device); | |
780 | ||
cf860be6 | 781 | device_del(&device->dev); |
bc9b6407 RW |
782 | /* |
783 | * Drop the reference counts of all power resources the device depends | |
784 | * on and turn off the ones that have no more references. | |
785 | */ | |
786 | acpi_power_transition(device, ACPI_STATE_D3_COLD); | |
cf860be6 | 787 | put_device(&device->dev); |
1da177e4 LT |
788 | } |
789 | ||
9e89dde2 ZR |
790 | /* -------------------------------------------------------------------------- |
791 | Driver Management | |
792 | -------------------------------------------------------------------------- */ | |
1da177e4 | 793 | /** |
d758a8fa RD |
794 | * acpi_bus_driver_init - add a device to a driver |
795 | * @device: the device to add and initialize | |
796 | * @driver: driver for the device | |
797 | * | |
0c526d96 | 798 | * Used to initialize a device via its device driver. Called whenever a |
1890a97a | 799 | * driver is bound to a device. Invokes the driver's add() ops. |
1da177e4 LT |
800 | */ |
801 | static int | |
4be44fcd | 802 | acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) |
1da177e4 | 803 | { |
4be44fcd | 804 | int result = 0; |
1da177e4 | 805 | |
1da177e4 | 806 | if (!device || !driver) |
d550d98d | 807 | return -EINVAL; |
1da177e4 LT |
808 | |
809 | if (!driver->ops.add) | |
d550d98d | 810 | return -ENOSYS; |
1da177e4 LT |
811 | |
812 | result = driver->ops.add(device); | |
813 | if (result) { | |
814 | device->driver = NULL; | |
db89b4f0 | 815 | device->driver_data = NULL; |
d550d98d | 816 | return result; |
1da177e4 LT |
817 | } |
818 | ||
819 | device->driver = driver; | |
820 | ||
821 | /* | |
822 | * TBD - Configuration Management: Assign resources to device based | |
823 | * upon possible configuration and currently allocated resources. | |
824 | */ | |
825 | ||
4be44fcd LB |
826 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
827 | "Driver successfully bound to device\n")); | |
d550d98d | 828 | return 0; |
3fb02738 RS |
829 | } |
830 | ||
9e89dde2 ZR |
831 | /** |
832 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
833 | * @driver: driver being registered | |
834 | * | |
835 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
836 | * devices that match the driver's criteria and binds. Returns zero for | |
837 | * success or a negative error status for failure. | |
838 | */ | |
839 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
1da177e4 | 840 | { |
1890a97a | 841 | int ret; |
1da177e4 | 842 | |
9e89dde2 ZR |
843 | if (acpi_disabled) |
844 | return -ENODEV; | |
1890a97a PM |
845 | driver->drv.name = driver->name; |
846 | driver->drv.bus = &acpi_bus_type; | |
847 | driver->drv.owner = driver->owner; | |
1da177e4 | 848 | |
1890a97a PM |
849 | ret = driver_register(&driver->drv); |
850 | return ret; | |
9e89dde2 | 851 | } |
1da177e4 | 852 | |
9e89dde2 ZR |
853 | EXPORT_SYMBOL(acpi_bus_register_driver); |
854 | ||
855 | /** | |
856 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus | |
857 | * @driver: driver to unregister | |
858 | * | |
859 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
860 | * devices that match the driver's criteria and unbinds. | |
861 | */ | |
862 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
863 | { | |
1890a97a | 864 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
865 | } |
866 | ||
867 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
868 | ||
9e89dde2 ZR |
869 | /* -------------------------------------------------------------------------- |
870 | Device Enumeration | |
871 | -------------------------------------------------------------------------- */ | |
5c478f49 BH |
872 | static struct acpi_device *acpi_bus_get_parent(acpi_handle handle) |
873 | { | |
874 | acpi_status status; | |
875 | int ret; | |
876 | struct acpi_device *device; | |
877 | ||
878 | /* | |
879 | * Fixed hardware devices do not appear in the namespace and do not | |
880 | * have handles, but we fabricate acpi_devices for them, so we have | |
881 | * to deal with them specially. | |
882 | */ | |
883 | if (handle == NULL) | |
884 | return acpi_root; | |
885 | ||
886 | do { | |
887 | status = acpi_get_parent(handle, &handle); | |
888 | if (status == AE_NULL_ENTRY) | |
889 | return NULL; | |
890 | if (ACPI_FAILURE(status)) | |
891 | return acpi_root; | |
892 | ||
893 | ret = acpi_bus_get_device(handle, &device); | |
894 | if (ret == 0) | |
895 | return device; | |
896 | } while (1); | |
897 | } | |
898 | ||
9e89dde2 ZR |
899 | acpi_status |
900 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
901 | { | |
902 | acpi_status status; | |
903 | acpi_handle tmp; | |
904 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
905 | union acpi_object *obj; | |
906 | ||
907 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
908 | if (ACPI_FAILURE(status)) | |
909 | return status; | |
910 | ||
911 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
912 | if (ACPI_SUCCESS(status)) { | |
913 | obj = buffer.pointer; | |
3b5fee59 HM |
914 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
915 | ejd); | |
9e89dde2 ZR |
916 | kfree(buffer.pointer); |
917 | } | |
918 | return status; | |
919 | } | |
920 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
921 | ||
8e4319c4 | 922 | void acpi_bus_data_handler(acpi_handle handle, void *context) |
9e89dde2 ZR |
923 | { |
924 | ||
925 | /* TBD */ | |
926 | ||
927 | return; | |
928 | } | |
929 | ||
e88c9c60 RW |
930 | static int acpi_bus_extract_wakeup_device_power_package(acpi_handle handle, |
931 | struct acpi_device_wakeup *wakeup) | |
9e89dde2 | 932 | { |
b581a7f9 RW |
933 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
934 | union acpi_object *package = NULL; | |
9e89dde2 | 935 | union acpi_object *element = NULL; |
b581a7f9 | 936 | acpi_status status; |
e88c9c60 | 937 | int err = -ENODATA; |
9e89dde2 | 938 | |
b581a7f9 | 939 | if (!wakeup) |
e88c9c60 | 940 | return -EINVAL; |
9e89dde2 | 941 | |
993cbe59 | 942 | INIT_LIST_HEAD(&wakeup->resources); |
9e89dde2 | 943 | |
b581a7f9 RW |
944 | /* _PRW */ |
945 | status = acpi_evaluate_object(handle, "_PRW", NULL, &buffer); | |
946 | if (ACPI_FAILURE(status)) { | |
947 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
e88c9c60 | 948 | return err; |
b581a7f9 RW |
949 | } |
950 | ||
951 | package = (union acpi_object *)buffer.pointer; | |
952 | ||
e88c9c60 | 953 | if (!package || package->package.count < 2) |
b581a7f9 | 954 | goto out; |
b581a7f9 | 955 | |
9e89dde2 | 956 | element = &(package->package.elements[0]); |
e88c9c60 | 957 | if (!element) |
b581a7f9 | 958 | goto out; |
e88c9c60 | 959 | |
9e89dde2 ZR |
960 | if (element->type == ACPI_TYPE_PACKAGE) { |
961 | if ((element->package.count < 2) || | |
962 | (element->package.elements[0].type != | |
963 | ACPI_TYPE_LOCAL_REFERENCE) | |
e88c9c60 | 964 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) |
b581a7f9 | 965 | goto out; |
e88c9c60 | 966 | |
b581a7f9 | 967 | wakeup->gpe_device = |
9e89dde2 | 968 | element->package.elements[0].reference.handle; |
b581a7f9 | 969 | wakeup->gpe_number = |
9e89dde2 ZR |
970 | (u32) element->package.elements[1].integer.value; |
971 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
b581a7f9 RW |
972 | wakeup->gpe_device = NULL; |
973 | wakeup->gpe_number = element->integer.value; | |
974 | } else { | |
b581a7f9 RW |
975 | goto out; |
976 | } | |
9e89dde2 ZR |
977 | |
978 | element = &(package->package.elements[1]); | |
e88c9c60 | 979 | if (element->type != ACPI_TYPE_INTEGER) |
b581a7f9 | 980 | goto out; |
e88c9c60 | 981 | |
b581a7f9 | 982 | wakeup->sleep_state = element->integer.value; |
9e89dde2 | 983 | |
e88c9c60 RW |
984 | err = acpi_extract_power_resources(package, 2, &wakeup->resources); |
985 | if (err) | |
b581a7f9 | 986 | goto out; |
9e89dde2 | 987 | |
0596a52b RW |
988 | if (!list_empty(&wakeup->resources)) { |
989 | int sleep_state; | |
9e89dde2 | 990 | |
0596a52b RW |
991 | sleep_state = acpi_power_min_system_level(&wakeup->resources); |
992 | if (sleep_state < wakeup->sleep_state) { | |
993 | acpi_handle_warn(handle, "Overriding _PRW sleep state " | |
994 | "(S%d) by S%d from power resources\n", | |
995 | (int)wakeup->sleep_state, sleep_state); | |
996 | wakeup->sleep_state = sleep_state; | |
997 | } | |
998 | } | |
bba63a29 | 999 | acpi_setup_gpe_for_wake(handle, wakeup->gpe_device, wakeup->gpe_number); |
9874647b | 1000 | |
b581a7f9 RW |
1001 | out: |
1002 | kfree(buffer.pointer); | |
e88c9c60 | 1003 | return err; |
1da177e4 LT |
1004 | } |
1005 | ||
f517709d | 1006 | static void acpi_bus_set_run_wake_flags(struct acpi_device *device) |
1da177e4 | 1007 | { |
29b71a1c | 1008 | struct acpi_device_id button_device_ids[] = { |
29b71a1c | 1009 | {"PNP0C0C", 0}, |
b7e38304 | 1010 | {"PNP0C0D", 0}, |
29b71a1c TR |
1011 | {"PNP0C0E", 0}, |
1012 | {"", 0}, | |
1013 | }; | |
f517709d RW |
1014 | acpi_status status; |
1015 | acpi_event_status event_status; | |
1016 | ||
b67ea761 | 1017 | device->wakeup.flags.notifier_present = 0; |
f517709d RW |
1018 | |
1019 | /* Power button, Lid switch always enable wakeup */ | |
1020 | if (!acpi_match_device_ids(device, button_device_ids)) { | |
1021 | device->wakeup.flags.run_wake = 1; | |
b7e38304 ZR |
1022 | if (!acpi_match_device_ids(device, &button_device_ids[1])) { |
1023 | /* Do not use Lid/sleep button for S5 wakeup */ | |
1024 | if (device->wakeup.sleep_state == ACPI_STATE_S5) | |
1025 | device->wakeup.sleep_state = ACPI_STATE_S4; | |
1026 | } | |
f2b56bc8 | 1027 | device_set_wakeup_capable(&device->dev, true); |
f517709d RW |
1028 | return; |
1029 | } | |
1030 | ||
e8e18c95 RW |
1031 | status = acpi_get_gpe_status(device->wakeup.gpe_device, |
1032 | device->wakeup.gpe_number, | |
1033 | &event_status); | |
f517709d RW |
1034 | if (status == AE_OK) |
1035 | device->wakeup.flags.run_wake = | |
1036 | !!(event_status & ACPI_EVENT_FLAG_HANDLE); | |
1037 | } | |
1038 | ||
d57d09a4 | 1039 | static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
f517709d | 1040 | { |
d57d09a4 | 1041 | acpi_handle temp; |
f517709d | 1042 | acpi_status status = 0; |
e88c9c60 | 1043 | int err; |
29b71a1c | 1044 | |
d57d09a4 RW |
1045 | /* Presence of _PRW indicates wake capable */ |
1046 | status = acpi_get_handle(device->handle, "_PRW", &temp); | |
1047 | if (ACPI_FAILURE(status)) | |
1048 | return; | |
1049 | ||
e88c9c60 RW |
1050 | err = acpi_bus_extract_wakeup_device_power_package(device->handle, |
1051 | &device->wakeup); | |
1052 | if (err) { | |
1053 | dev_err(&device->dev, "_PRW evaluation error: %d\n", err); | |
d57d09a4 | 1054 | return; |
9e89dde2 | 1055 | } |
1da177e4 | 1056 | |
9e89dde2 | 1057 | device->wakeup.flags.valid = 1; |
9b83ccd2 | 1058 | device->wakeup.prepare_count = 0; |
f517709d | 1059 | acpi_bus_set_run_wake_flags(device); |
729b2bdb ZY |
1060 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
1061 | * system for the ACPI device with the _PRW object. | |
1062 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. | |
1063 | * So it is necessary to call _DSW object first. Only when it is not | |
1064 | * present will the _PSW object used. | |
1065 | */ | |
e88c9c60 RW |
1066 | err = acpi_device_sleep_wake(device, 0, 0, 0); |
1067 | if (err) | |
77e76609 RW |
1068 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
1069 | "error in _DSW or _PSW evaluation\n")); | |
1da177e4 | 1070 | } |
1da177e4 | 1071 | |
f33ce568 RW |
1072 | static void acpi_bus_init_power_state(struct acpi_device *device, int state) |
1073 | { | |
1074 | struct acpi_device_power_state *ps = &device->power.states[state]; | |
ef85bdbe RW |
1075 | char pathname[5] = { '_', 'P', 'R', '0' + state, '\0' }; |
1076 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
f33ce568 RW |
1077 | acpi_handle handle; |
1078 | acpi_status status; | |
bf325f95 | 1079 | |
f33ce568 RW |
1080 | INIT_LIST_HEAD(&ps->resources); |
1081 | ||
ef85bdbe RW |
1082 | /* Evaluate "_PRx" to get referenced power resources */ |
1083 | status = acpi_evaluate_object(device->handle, pathname, NULL, &buffer); | |
1084 | if (ACPI_SUCCESS(status)) { | |
1085 | union acpi_object *package = buffer.pointer; | |
1086 | ||
1087 | if (buffer.length && package | |
1088 | && package->type == ACPI_TYPE_PACKAGE | |
1089 | && package->package.count) { | |
e88c9c60 RW |
1090 | int err = acpi_extract_power_resources(package, 0, |
1091 | &ps->resources); | |
1092 | if (!err) | |
ef85bdbe | 1093 | device->power.flags.power_resources = 1; |
f33ce568 | 1094 | } |
ef85bdbe | 1095 | ACPI_FREE(buffer.pointer); |
f33ce568 RW |
1096 | } |
1097 | ||
1098 | /* Evaluate "_PSx" to see if we can do explicit sets */ | |
ef85bdbe RW |
1099 | pathname[2] = 'S'; |
1100 | status = acpi_get_handle(device->handle, pathname, &handle); | |
f33ce568 RW |
1101 | if (ACPI_SUCCESS(status)) |
1102 | ps->flags.explicit_set = 1; | |
1103 | ||
1104 | /* | |
1105 | * State is valid if there are means to put the device into it. | |
1106 | * D3hot is only valid if _PR3 present. | |
1107 | */ | |
ef85bdbe | 1108 | if (!list_empty(&ps->resources) |
f33ce568 RW |
1109 | || (ps->flags.explicit_set && state < ACPI_STATE_D3_HOT)) { |
1110 | ps->flags.valid = 1; | |
1111 | ps->flags.os_accessible = 1; | |
1112 | } | |
1113 | ||
1114 | ps->power = -1; /* Unknown - driver assigned */ | |
1115 | ps->latency = -1; /* Unknown - driver assigned */ | |
1116 | } | |
1117 | ||
d43e167d | 1118 | static void acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 1119 | { |
8bc5053b RW |
1120 | acpi_status status; |
1121 | acpi_handle handle; | |
1122 | u32 i; | |
1a365616 | 1123 | |
d43e167d RW |
1124 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ |
1125 | status = acpi_get_handle(device->handle, "_PS0", &handle); | |
1126 | if (ACPI_FAILURE(status)) { | |
1127 | status = acpi_get_handle(device->handle, "_PR0", &handle); | |
1128 | if (ACPI_FAILURE(status)) | |
1129 | return; | |
1130 | } | |
1131 | ||
1132 | device->flags.power_manageable = 1; | |
4be44fcd | 1133 | |
9e89dde2 ZR |
1134 | /* |
1135 | * Power Management Flags | |
1136 | */ | |
1137 | status = acpi_get_handle(device->handle, "_PSC", &handle); | |
1138 | if (ACPI_SUCCESS(status)) | |
1139 | device->power.flags.explicit_get = 1; | |
1140 | status = acpi_get_handle(device->handle, "_IRC", &handle); | |
1141 | if (ACPI_SUCCESS(status)) | |
1142 | device->power.flags.inrush_current = 1; | |
1da177e4 | 1143 | |
9e89dde2 ZR |
1144 | /* |
1145 | * Enumerate supported power management states | |
1146 | */ | |
f33ce568 RW |
1147 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) |
1148 | acpi_bus_init_power_state(device, i); | |
bf325f95 | 1149 | |
0b224527 | 1150 | INIT_LIST_HEAD(&device->power.states[ACPI_STATE_D3_COLD].resources); |
1da177e4 | 1151 | |
9e89dde2 ZR |
1152 | /* Set defaults for D0 and D3 states (always valid) */ |
1153 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
1154 | device->power.states[ACPI_STATE_D0].power = 100; | |
1155 | device->power.states[ACPI_STATE_D3].flags.valid = 1; | |
1156 | device->power.states[ACPI_STATE_D3].power = 0; | |
c8f7a62c | 1157 | |
5c7dd710 RW |
1158 | /* Set D3cold's explicit_set flag if _PS3 exists. */ |
1159 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set) | |
1160 | device->power.states[ACPI_STATE_D3_COLD].flags.explicit_set = 1; | |
1161 | ||
1399dfcd AL |
1162 | /* Presence of _PS3 or _PRx means we can put the device into D3 cold */ |
1163 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set || | |
1164 | device->power.flags.power_resources) | |
1165 | device->power.states[ACPI_STATE_D3_COLD].flags.os_accessible = 1; | |
1166 | ||
ade3e7fe | 1167 | acpi_bus_init_power(device); |
9e89dde2 | 1168 | } |
c8f7a62c | 1169 | |
d43e167d | 1170 | static void acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 1171 | { |
4be44fcd LB |
1172 | acpi_status status = AE_OK; |
1173 | acpi_handle temp = NULL; | |
1da177e4 | 1174 | |
1da177e4 LT |
1175 | /* Presence of _STA indicates 'dynamic_status' */ |
1176 | status = acpi_get_handle(device->handle, "_STA", &temp); | |
1177 | if (ACPI_SUCCESS(status)) | |
1178 | device->flags.dynamic_status = 1; | |
1179 | ||
1da177e4 LT |
1180 | /* Presence of _RMV indicates 'removable' */ |
1181 | status = acpi_get_handle(device->handle, "_RMV", &temp); | |
1182 | if (ACPI_SUCCESS(status)) | |
1183 | device->flags.removable = 1; | |
1184 | ||
1185 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
1186 | status = acpi_get_handle(device->handle, "_EJD", &temp); | |
1187 | if (ACPI_SUCCESS(status)) | |
1188 | device->flags.ejectable = 1; | |
1189 | else { | |
1190 | status = acpi_get_handle(device->handle, "_EJ0", &temp); | |
1191 | if (ACPI_SUCCESS(status)) | |
1192 | device->flags.ejectable = 1; | |
1193 | } | |
1da177e4 LT |
1194 | } |
1195 | ||
c7bcb4e9 | 1196 | static void acpi_device_get_busid(struct acpi_device *device) |
1da177e4 | 1197 | { |
4be44fcd LB |
1198 | char bus_id[5] = { '?', 0 }; |
1199 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
1200 | int i = 0; | |
1da177e4 LT |
1201 | |
1202 | /* | |
1203 | * Bus ID | |
1204 | * ------ | |
1205 | * The device's Bus ID is simply the object name. | |
1206 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
1207 | */ | |
859ac9a4 | 1208 | if (ACPI_IS_ROOT_DEVICE(device)) { |
1da177e4 | 1209 | strcpy(device->pnp.bus_id, "ACPI"); |
859ac9a4 BH |
1210 | return; |
1211 | } | |
1212 | ||
1213 | switch (device->device_type) { | |
1da177e4 LT |
1214 | case ACPI_BUS_TYPE_POWER_BUTTON: |
1215 | strcpy(device->pnp.bus_id, "PWRF"); | |
1216 | break; | |
1217 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
1218 | strcpy(device->pnp.bus_id, "SLPF"); | |
1219 | break; | |
1220 | default: | |
66b7ed40 | 1221 | acpi_get_name(device->handle, ACPI_SINGLE_NAME, &buffer); |
1da177e4 LT |
1222 | /* Clean up trailing underscores (if any) */ |
1223 | for (i = 3; i > 1; i--) { | |
1224 | if (bus_id[i] == '_') | |
1225 | bus_id[i] = '\0'; | |
1226 | else | |
1227 | break; | |
1228 | } | |
1229 | strcpy(device->pnp.bus_id, bus_id); | |
1230 | break; | |
1231 | } | |
1232 | } | |
1233 | ||
54735266 ZR |
1234 | /* |
1235 | * acpi_bay_match - see if a device is an ejectable driver bay | |
1236 | * | |
1237 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
1238 | * then we can safely call it an ejectable drive bay | |
1239 | */ | |
1240 | static int acpi_bay_match(struct acpi_device *device){ | |
1241 | acpi_status status; | |
1242 | acpi_handle handle; | |
1243 | acpi_handle tmp; | |
1244 | acpi_handle phandle; | |
1245 | ||
1246 | handle = device->handle; | |
1247 | ||
1248 | status = acpi_get_handle(handle, "_EJ0", &tmp); | |
1249 | if (ACPI_FAILURE(status)) | |
1250 | return -ENODEV; | |
1251 | ||
1252 | if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || | |
1253 | (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || | |
1254 | (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || | |
1255 | (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) | |
1256 | return 0; | |
1257 | ||
1258 | if (acpi_get_parent(handle, &phandle)) | |
1259 | return -ENODEV; | |
1260 | ||
1261 | if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) || | |
1262 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) || | |
1263 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) || | |
1264 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp)))) | |
1265 | return 0; | |
1266 | ||
1267 | return -ENODEV; | |
1268 | } | |
1269 | ||
3620f2f2 FS |
1270 | /* |
1271 | * acpi_dock_match - see if a device has a _DCK method | |
1272 | */ | |
1273 | static int acpi_dock_match(struct acpi_device *device) | |
1274 | { | |
1275 | acpi_handle tmp; | |
1276 | return acpi_get_handle(device->handle, "_DCK", &tmp); | |
1277 | } | |
1278 | ||
620e112c | 1279 | const char *acpi_device_hid(struct acpi_device *device) |
15b8dd53 | 1280 | { |
7f47fa6c | 1281 | struct acpi_hardware_id *hid; |
15b8dd53 | 1282 | |
2b2ae7c7 TR |
1283 | if (list_empty(&device->pnp.ids)) |
1284 | return dummy_hid; | |
1285 | ||
7f47fa6c BH |
1286 | hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list); |
1287 | return hid->id; | |
1288 | } | |
1289 | EXPORT_SYMBOL(acpi_device_hid); | |
15b8dd53 | 1290 | |
7f47fa6c BH |
1291 | static void acpi_add_id(struct acpi_device *device, const char *dev_id) |
1292 | { | |
1293 | struct acpi_hardware_id *id; | |
15b8dd53 | 1294 | |
7f47fa6c BH |
1295 | id = kmalloc(sizeof(*id), GFP_KERNEL); |
1296 | if (!id) | |
1297 | return; | |
15b8dd53 | 1298 | |
581de59e | 1299 | id->id = kstrdup(dev_id, GFP_KERNEL); |
7f47fa6c BH |
1300 | if (!id->id) { |
1301 | kfree(id); | |
1302 | return; | |
15b8dd53 BM |
1303 | } |
1304 | ||
7f47fa6c | 1305 | list_add_tail(&id->list, &device->pnp.ids); |
15b8dd53 BM |
1306 | } |
1307 | ||
222e82ac DW |
1308 | /* |
1309 | * Old IBM workstations have a DSDT bug wherein the SMBus object | |
1310 | * lacks the SMBUS01 HID and the methods do not have the necessary "_" | |
1311 | * prefix. Work around this. | |
1312 | */ | |
1313 | static int acpi_ibm_smbus_match(struct acpi_device *device) | |
1314 | { | |
1315 | acpi_handle h_dummy; | |
1316 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
1317 | int result; | |
1318 | ||
1319 | if (!dmi_name_in_vendors("IBM")) | |
1320 | return -ENODEV; | |
1321 | ||
1322 | /* Look for SMBS object */ | |
1323 | result = acpi_get_name(device->handle, ACPI_SINGLE_NAME, &path); | |
1324 | if (result) | |
1325 | return result; | |
1326 | ||
1327 | if (strcmp("SMBS", path.pointer)) { | |
1328 | result = -ENODEV; | |
1329 | goto out; | |
1330 | } | |
1331 | ||
1332 | /* Does it have the necessary (but misnamed) methods? */ | |
1333 | result = -ENODEV; | |
1334 | if (ACPI_SUCCESS(acpi_get_handle(device->handle, "SBI", &h_dummy)) && | |
1335 | ACPI_SUCCESS(acpi_get_handle(device->handle, "SBR", &h_dummy)) && | |
1336 | ACPI_SUCCESS(acpi_get_handle(device->handle, "SBW", &h_dummy))) | |
1337 | result = 0; | |
1338 | out: | |
1339 | kfree(path.pointer); | |
1340 | return result; | |
1341 | } | |
1342 | ||
c7bcb4e9 | 1343 | static void acpi_device_set_id(struct acpi_device *device) |
1da177e4 | 1344 | { |
4be44fcd | 1345 | acpi_status status; |
57f3674f | 1346 | struct acpi_device_info *info; |
78e25fef | 1347 | struct acpi_pnp_device_id_list *cid_list; |
7f47fa6c | 1348 | int i; |
1da177e4 | 1349 | |
c7bcb4e9 | 1350 | switch (device->device_type) { |
1da177e4 | 1351 | case ACPI_BUS_TYPE_DEVICE: |
859ac9a4 | 1352 | if (ACPI_IS_ROOT_DEVICE(device)) { |
57f3674f | 1353 | acpi_add_id(device, ACPI_SYSTEM_HID); |
859ac9a4 BH |
1354 | break; |
1355 | } | |
1356 | ||
66b7ed40 | 1357 | status = acpi_get_object_info(device->handle, &info); |
1da177e4 | 1358 | if (ACPI_FAILURE(status)) { |
96b2dd1f | 1359 | printk(KERN_ERR PREFIX "%s: Error reading device info\n", __func__); |
1da177e4 LT |
1360 | return; |
1361 | } | |
1362 | ||
1da177e4 | 1363 | if (info->valid & ACPI_VALID_HID) |
57f3674f BH |
1364 | acpi_add_id(device, info->hardware_id.string); |
1365 | if (info->valid & ACPI_VALID_CID) { | |
15b8dd53 | 1366 | cid_list = &info->compatible_id_list; |
57f3674f BH |
1367 | for (i = 0; i < cid_list->count; i++) |
1368 | acpi_add_id(device, cid_list->ids[i].string); | |
1369 | } | |
1da177e4 LT |
1370 | if (info->valid & ACPI_VALID_ADR) { |
1371 | device->pnp.bus_address = info->address; | |
1372 | device->flags.bus_address = 1; | |
1373 | } | |
ccf78040 LZ |
1374 | if (info->valid & ACPI_VALID_UID) |
1375 | device->pnp.unique_id = kstrdup(info->unique_id.string, | |
1376 | GFP_KERNEL); | |
ae843332 | 1377 | |
a83893ae BH |
1378 | kfree(info); |
1379 | ||
57f3674f BH |
1380 | /* |
1381 | * Some devices don't reliably have _HIDs & _CIDs, so add | |
1382 | * synthetic HIDs to make sure drivers can find them. | |
1383 | */ | |
c3d6de69 | 1384 | if (acpi_is_video_device(device)) |
57f3674f | 1385 | acpi_add_id(device, ACPI_VIDEO_HID); |
3620f2f2 | 1386 | else if (ACPI_SUCCESS(acpi_bay_match(device))) |
57f3674f | 1387 | acpi_add_id(device, ACPI_BAY_HID); |
3620f2f2 | 1388 | else if (ACPI_SUCCESS(acpi_dock_match(device))) |
57f3674f | 1389 | acpi_add_id(device, ACPI_DOCK_HID); |
222e82ac DW |
1390 | else if (!acpi_ibm_smbus_match(device)) |
1391 | acpi_add_id(device, ACPI_SMBUS_IBM_HID); | |
4f5f64cf | 1392 | else if (list_empty(&device->pnp.ids) && |
b7b30de5 BH |
1393 | ACPI_IS_ROOT_DEVICE(device->parent)) { |
1394 | acpi_add_id(device, ACPI_BUS_HID); /* \_SB, LNXSYBUS */ | |
1395 | strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME); | |
1396 | strcpy(device->pnp.device_class, ACPI_BUS_CLASS); | |
1397 | } | |
54735266 | 1398 | |
1da177e4 LT |
1399 | break; |
1400 | case ACPI_BUS_TYPE_POWER: | |
57f3674f | 1401 | acpi_add_id(device, ACPI_POWER_HID); |
1da177e4 LT |
1402 | break; |
1403 | case ACPI_BUS_TYPE_PROCESSOR: | |
57f3674f | 1404 | acpi_add_id(device, ACPI_PROCESSOR_OBJECT_HID); |
1da177e4 | 1405 | break; |
1da177e4 | 1406 | case ACPI_BUS_TYPE_THERMAL: |
57f3674f | 1407 | acpi_add_id(device, ACPI_THERMAL_HID); |
1da177e4 LT |
1408 | break; |
1409 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
57f3674f | 1410 | acpi_add_id(device, ACPI_BUTTON_HID_POWERF); |
1da177e4 LT |
1411 | break; |
1412 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
57f3674f | 1413 | acpi_add_id(device, ACPI_BUTTON_HID_SLEEPF); |
1da177e4 LT |
1414 | break; |
1415 | } | |
1da177e4 LT |
1416 | } |
1417 | ||
82c7d5ef RW |
1418 | void acpi_init_device_object(struct acpi_device *device, acpi_handle handle, |
1419 | int type, unsigned long long sta) | |
1da177e4 | 1420 | { |
d43e167d RW |
1421 | INIT_LIST_HEAD(&device->pnp.ids); |
1422 | device->device_type = type; | |
1423 | device->handle = handle; | |
1424 | device->parent = acpi_bus_get_parent(handle); | |
1425 | STRUCT_TO_INT(device->status) = sta; | |
1426 | acpi_device_get_busid(device); | |
1427 | acpi_device_set_id(device); | |
1428 | acpi_bus_get_flags(device); | |
2c0d4fe0 | 1429 | device->flags.match_driver = false; |
cf860be6 RW |
1430 | device_initialize(&device->dev); |
1431 | dev_set_uevent_suppress(&device->dev, true); | |
1432 | } | |
bc3b0772 | 1433 | |
cf860be6 RW |
1434 | void acpi_device_add_finalize(struct acpi_device *device) |
1435 | { | |
2c0d4fe0 | 1436 | device->flags.match_driver = true; |
cf860be6 RW |
1437 | dev_set_uevent_suppress(&device->dev, false); |
1438 | kobject_uevent(&device->dev.kobj, KOBJ_ADD); | |
1da177e4 LT |
1439 | } |
1440 | ||
5c478f49 BH |
1441 | static int acpi_add_single_object(struct acpi_device **child, |
1442 | acpi_handle handle, int type, | |
2c0d4fe0 | 1443 | unsigned long long sta) |
1da177e4 | 1444 | { |
77c24888 BH |
1445 | int result; |
1446 | struct acpi_device *device; | |
29aaefa6 | 1447 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 1448 | |
36bcbec7 | 1449 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 1450 | if (!device) { |
6468463a | 1451 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 1452 | return -ENOMEM; |
1da177e4 | 1453 | } |
1da177e4 | 1454 | |
d43e167d RW |
1455 | acpi_init_device_object(device, handle, type, sta); |
1456 | acpi_bus_get_power_flags(device); | |
d57d09a4 | 1457 | acpi_bus_get_wakeup_device_flags(device); |
1da177e4 | 1458 | |
cf860be6 | 1459 | result = acpi_device_add(device, acpi_device_release); |
d43e167d | 1460 | if (result) { |
718fb0de | 1461 | acpi_device_release(&device->dev); |
d43e167d RW |
1462 | return result; |
1463 | } | |
1da177e4 | 1464 | |
d43e167d | 1465 | acpi_power_add_remove_device(device, true); |
cf860be6 | 1466 | acpi_device_add_finalize(device); |
d43e167d RW |
1467 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); |
1468 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Added %s [%s] parent %s\n", | |
1469 | dev_name(&device->dev), (char *) buffer.pointer, | |
1470 | device->parent ? dev_name(&device->parent->dev) : "(null)")); | |
1471 | kfree(buffer.pointer); | |
1472 | *child = device; | |
1473 | return 0; | |
bf325f95 RW |
1474 | } |
1475 | ||
778cbc1d BH |
1476 | static int acpi_bus_type_and_status(acpi_handle handle, int *type, |
1477 | unsigned long long *sta) | |
1da177e4 | 1478 | { |
778cbc1d BH |
1479 | acpi_status status; |
1480 | acpi_object_type acpi_type; | |
1da177e4 | 1481 | |
778cbc1d | 1482 | status = acpi_get_type(handle, &acpi_type); |
51a85faf | 1483 | if (ACPI_FAILURE(status)) |
778cbc1d | 1484 | return -ENODEV; |
4be44fcd | 1485 | |
778cbc1d | 1486 | switch (acpi_type) { |
51a85faf BH |
1487 | case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */ |
1488 | case ACPI_TYPE_DEVICE: | |
778cbc1d BH |
1489 | *type = ACPI_BUS_TYPE_DEVICE; |
1490 | status = acpi_bus_get_status_handle(handle, sta); | |
1491 | if (ACPI_FAILURE(status)) | |
1492 | return -ENODEV; | |
51a85faf BH |
1493 | break; |
1494 | case ACPI_TYPE_PROCESSOR: | |
778cbc1d BH |
1495 | *type = ACPI_BUS_TYPE_PROCESSOR; |
1496 | status = acpi_bus_get_status_handle(handle, sta); | |
1497 | if (ACPI_FAILURE(status)) | |
1498 | return -ENODEV; | |
51a85faf BH |
1499 | break; |
1500 | case ACPI_TYPE_THERMAL: | |
778cbc1d BH |
1501 | *type = ACPI_BUS_TYPE_THERMAL; |
1502 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1503 | break; |
1504 | case ACPI_TYPE_POWER: | |
778cbc1d BH |
1505 | *type = ACPI_BUS_TYPE_POWER; |
1506 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1507 | break; |
1508 | default: | |
778cbc1d | 1509 | return -ENODEV; |
51a85faf | 1510 | } |
1da177e4 | 1511 | |
778cbc1d BH |
1512 | return 0; |
1513 | } | |
1514 | ||
e3863094 RW |
1515 | static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used, |
1516 | void *not_used, void **return_value) | |
778cbc1d | 1517 | { |
805d410f | 1518 | struct acpi_device *device = NULL; |
778cbc1d BH |
1519 | int type; |
1520 | unsigned long long sta; | |
e3b87f8a | 1521 | acpi_status status; |
778cbc1d BH |
1522 | int result; |
1523 | ||
4002bf38 RW |
1524 | acpi_bus_get_device(handle, &device); |
1525 | if (device) | |
1526 | goto out; | |
1527 | ||
778cbc1d BH |
1528 | result = acpi_bus_type_and_status(handle, &type, &sta); |
1529 | if (result) | |
1530 | return AE_OK; | |
1531 | ||
82c7d5ef RW |
1532 | if (type == ACPI_BUS_TYPE_POWER) { |
1533 | acpi_add_power_resource(handle); | |
1534 | return AE_OK; | |
1535 | } | |
1536 | ||
778cbc1d | 1537 | if (!(sta & ACPI_STA_DEVICE_PRESENT) && |
b581a7f9 | 1538 | !(sta & ACPI_STA_DEVICE_FUNCTIONING)) { |
86e4e20e RW |
1539 | struct acpi_device_wakeup wakeup; |
1540 | acpi_handle temp; | |
1541 | ||
1542 | status = acpi_get_handle(handle, "_PRW", &temp); | |
993cbe59 | 1543 | if (ACPI_SUCCESS(status)) { |
86e4e20e RW |
1544 | acpi_bus_extract_wakeup_device_power_package(handle, |
1545 | &wakeup); | |
993cbe59 RW |
1546 | acpi_power_resources_list_free(&wakeup.resources); |
1547 | } | |
778cbc1d | 1548 | return AE_CTRL_DEPTH; |
b581a7f9 | 1549 | } |
778cbc1d | 1550 | |
2c0d4fe0 | 1551 | acpi_add_single_object(&device, handle, type, sta); |
e3b87f8a | 1552 | if (!device) |
51a85faf | 1553 | return AE_CTRL_DEPTH; |
1da177e4 | 1554 | |
4002bf38 | 1555 | out: |
51a85faf BH |
1556 | if (!*return_value) |
1557 | *return_value = device; | |
805d410f | 1558 | |
51a85faf BH |
1559 | return AE_OK; |
1560 | } | |
3fb02738 | 1561 | |
ca589f94 RW |
1562 | static int acpi_scan_attach_handler(struct acpi_device *device) |
1563 | { | |
1564 | struct acpi_scan_handler *handler; | |
1565 | int ret = 0; | |
1566 | ||
1567 | list_for_each_entry(handler, &acpi_scan_handlers_list, list_node) { | |
1568 | const struct acpi_device_id *id; | |
1569 | ||
1570 | id = __acpi_match_device(device, handler->ids); | |
1571 | if (!id) | |
1572 | continue; | |
1573 | ||
1574 | ret = handler->attach(device, id); | |
1575 | if (ret > 0) { | |
1576 | device->handler = handler; | |
1577 | break; | |
1578 | } else if (ret < 0) { | |
1579 | break; | |
1580 | } | |
1581 | } | |
1582 | return ret; | |
1583 | } | |
1584 | ||
0fc300b0 RW |
1585 | static acpi_status acpi_bus_device_attach(acpi_handle handle, u32 lvl_not_used, |
1586 | void *not_used, void **ret_not_used) | |
51a85faf | 1587 | { |
805d410f RW |
1588 | struct acpi_device *device; |
1589 | unsigned long long sta_not_used; | |
ca589f94 | 1590 | int ret; |
3fb02738 | 1591 | |
805d410f RW |
1592 | /* |
1593 | * Ignore errors ignored by acpi_bus_check_add() to avoid terminating | |
1594 | * namespace walks prematurely. | |
1595 | */ | |
ca589f94 | 1596 | if (acpi_bus_type_and_status(handle, &ret, &sta_not_used)) |
805d410f | 1597 | return AE_OK; |
1da177e4 | 1598 | |
805d410f RW |
1599 | if (acpi_bus_get_device(handle, &device)) |
1600 | return AE_CTRL_DEPTH; | |
7779688f | 1601 | |
ca589f94 RW |
1602 | ret = acpi_scan_attach_handler(device); |
1603 | if (ret) | |
1604 | return ret > 0 ? AE_OK : AE_CTRL_DEPTH; | |
1605 | ||
1606 | ret = device_attach(&device->dev); | |
1607 | return ret >= 0 ? AE_OK : AE_CTRL_DEPTH; | |
1da177e4 | 1608 | } |
1da177e4 | 1609 | |
636458de | 1610 | /** |
b8bd759a | 1611 | * acpi_bus_scan - Add ACPI device node objects in a given namespace scope. |
636458de | 1612 | * @handle: Root of the namespace scope to scan. |
7779688f | 1613 | * |
636458de RW |
1614 | * Scan a given ACPI tree (probably recently hot-plugged) and create and add |
1615 | * found devices. | |
7779688f | 1616 | * |
636458de RW |
1617 | * If no devices were found, -ENODEV is returned, but it does not mean that |
1618 | * there has been a real error. There just have been no suitable ACPI objects | |
1619 | * in the table trunk from which the kernel could create a device and add an | |
1620 | * appropriate driver. | |
7779688f | 1621 | */ |
b8bd759a | 1622 | int acpi_bus_scan(acpi_handle handle) |
3fb02738 | 1623 | { |
b8bd759a | 1624 | void *device = NULL; |
c511cc19 RW |
1625 | int error = 0; |
1626 | ||
1627 | mutex_lock(&acpi_scan_lock); | |
3fb02738 | 1628 | |
b8bd759a RW |
1629 | if (ACPI_SUCCESS(acpi_bus_check_add(handle, 0, NULL, &device))) |
1630 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
1631 | acpi_bus_check_add, NULL, NULL, &device); | |
3fb02738 | 1632 | |
d2f6650a | 1633 | if (!device) |
c511cc19 RW |
1634 | error = -ENODEV; |
1635 | else if (ACPI_SUCCESS(acpi_bus_device_attach(handle, 0, NULL, NULL))) | |
b8bd759a RW |
1636 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
1637 | acpi_bus_device_attach, NULL, NULL, NULL); | |
a2100801 | 1638 | |
c511cc19 RW |
1639 | mutex_unlock(&acpi_scan_lock); |
1640 | return error; | |
3fb02738 | 1641 | } |
b8bd759a | 1642 | EXPORT_SYMBOL(acpi_bus_scan); |
1da177e4 | 1643 | |
05404d8f RW |
1644 | static acpi_status acpi_bus_device_detach(acpi_handle handle, u32 lvl_not_used, |
1645 | void *not_used, void **ret_not_used) | |
1da177e4 | 1646 | { |
05404d8f | 1647 | struct acpi_device *device = NULL; |
4be44fcd | 1648 | |
05404d8f | 1649 | if (!acpi_bus_get_device(handle, &device)) { |
ca589f94 RW |
1650 | struct acpi_scan_handler *dev_handler = device->handler; |
1651 | ||
05404d8f | 1652 | device->removal_type = ACPI_BUS_REMOVAL_EJECT; |
ca589f94 RW |
1653 | if (dev_handler) { |
1654 | if (dev_handler->detach) | |
1655 | dev_handler->detach(device); | |
1656 | ||
1657 | device->handler = NULL; | |
1658 | } else { | |
1659 | device_release_driver(&device->dev); | |
1660 | } | |
05404d8f RW |
1661 | } |
1662 | return AE_OK; | |
1663 | } | |
1da177e4 | 1664 | |
05404d8f RW |
1665 | static acpi_status acpi_bus_remove(acpi_handle handle, u32 lvl_not_used, |
1666 | void *not_used, void **ret_not_used) | |
1667 | { | |
1668 | struct acpi_device *device = NULL; | |
1da177e4 | 1669 | |
05404d8f RW |
1670 | if (!acpi_bus_get_device(handle, &device)) |
1671 | acpi_device_unregister(device); | |
1da177e4 | 1672 | |
05404d8f RW |
1673 | return AE_OK; |
1674 | } | |
1da177e4 | 1675 | |
bfee26db | 1676 | void acpi_bus_trim(struct acpi_device *start) |
1da177e4 | 1677 | { |
c511cc19 RW |
1678 | mutex_lock(&acpi_scan_lock); |
1679 | ||
05404d8f RW |
1680 | /* |
1681 | * Execute acpi_bus_device_detach() as a post-order callback to detach | |
1682 | * all ACPI drivers from the device nodes being removed. | |
1683 | */ | |
1684 | acpi_walk_namespace(ACPI_TYPE_ANY, start->handle, ACPI_UINT32_MAX, NULL, | |
1685 | acpi_bus_device_detach, NULL, NULL); | |
1686 | acpi_bus_device_detach(start->handle, 0, NULL, NULL); | |
cecdb193 RW |
1687 | /* |
1688 | * Execute acpi_bus_remove() as a post-order callback to remove device | |
1689 | * nodes in the given namespace scope. | |
1690 | */ | |
1691 | acpi_walk_namespace(ACPI_TYPE_ANY, start->handle, ACPI_UINT32_MAX, NULL, | |
1692 | acpi_bus_remove, NULL, NULL); | |
1693 | acpi_bus_remove(start->handle, 0, NULL, NULL); | |
c511cc19 RW |
1694 | |
1695 | mutex_unlock(&acpi_scan_lock); | |
1da177e4 | 1696 | } |
ceaba663 KA |
1697 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
1698 | ||
e8b945c9 | 1699 | static int acpi_bus_scan_fixed(void) |
1da177e4 | 1700 | { |
4be44fcd | 1701 | int result = 0; |
c4168bff | 1702 | |
1da177e4 LT |
1703 | /* |
1704 | * Enumerate all fixed-feature devices. | |
1705 | */ | |
2c0d4fe0 RW |
1706 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON)) { |
1707 | struct acpi_device *device = NULL; | |
1708 | ||
5c478f49 | 1709 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1710 | ACPI_BUS_TYPE_POWER_BUTTON, |
2c0d4fe0 RW |
1711 | ACPI_STA_DEFAULT); |
1712 | if (result) | |
1713 | return result; | |
1714 | ||
1715 | result = device_attach(&device->dev); | |
1716 | if (result < 0) | |
1717 | return result; | |
1718 | ||
c10d7a13 | 1719 | device_init_wakeup(&device->dev, true); |
3fb02738 | 1720 | } |
1da177e4 | 1721 | |
2c0d4fe0 RW |
1722 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON)) { |
1723 | struct acpi_device *device = NULL; | |
1724 | ||
5c478f49 | 1725 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1726 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
2c0d4fe0 RW |
1727 | ACPI_STA_DEFAULT); |
1728 | if (result) | |
1729 | return result; | |
1730 | ||
1731 | result = device_attach(&device->dev); | |
3fb02738 | 1732 | } |
1da177e4 | 1733 | |
2c0d4fe0 | 1734 | return result < 0 ? result : 0; |
1da177e4 LT |
1735 | } |
1736 | ||
e747f274 | 1737 | int __init acpi_scan_init(void) |
1da177e4 LT |
1738 | { |
1739 | int result; | |
1da177e4 | 1740 | |
5b327265 PM |
1741 | result = bus_register(&acpi_bus_type); |
1742 | if (result) { | |
1743 | /* We don't want to quit even if we failed to add suspend/resume */ | |
1744 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
1745 | } | |
1746 | ||
92ef2a25 | 1747 | acpi_pci_root_init(); |
4daeaf68 | 1748 | acpi_pci_link_init(); |
141a297b | 1749 | acpi_platform_init(); |
13176bbf | 1750 | acpi_csrt_init(); |
97d9a9e9 | 1751 | |
1da177e4 LT |
1752 | /* |
1753 | * Enumerate devices in the ACPI namespace. | |
1754 | */ | |
0cd6ac52 RW |
1755 | result = acpi_bus_scan(ACPI_ROOT_OBJECT); |
1756 | if (result) | |
1757 | return result; | |
1da177e4 | 1758 | |
0cd6ac52 | 1759 | result = acpi_bus_get_device(ACPI_ROOT_OBJECT, &acpi_root); |
1da177e4 | 1760 | if (result) |
b8bd759a | 1761 | return result; |
1da177e4 | 1762 | |
b8bd759a RW |
1763 | result = acpi_bus_scan_fixed(); |
1764 | if (result) { | |
b17b537a | 1765 | acpi_device_unregister(acpi_root); |
b8bd759a RW |
1766 | return result; |
1767 | } | |
1da177e4 | 1768 | |
b8bd759a RW |
1769 | acpi_update_all_gpes(); |
1770 | return 0; | |
1da177e4 | 1771 | } |