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> | |
9b6d97b6 | 7 | #include <linux/kernel.h> |
1da177e4 | 8 | #include <linux/acpi.h> |
74523c90 AK |
9 | #include <linux/signal.h> |
10 | #include <linux/kthread.h> | |
1da177e4 LT |
11 | |
12 | #include <acpi/acpi_drivers.h> | |
1da177e4 | 13 | |
e60cc7a6 BH |
14 | #include "internal.h" |
15 | ||
1da177e4 | 16 | #define _COMPONENT ACPI_BUS_COMPONENT |
f52fd66d | 17 | ACPI_MODULE_NAME("scan"); |
1da177e4 | 18 | #define STRUCT_TO_INT(s) (*((int*)&s)) |
4be44fcd | 19 | extern struct acpi_device *acpi_root; |
1da177e4 LT |
20 | |
21 | #define ACPI_BUS_CLASS "system_bus" | |
29b71a1c | 22 | #define ACPI_BUS_HID "LNXSYBUS" |
1da177e4 LT |
23 | #define ACPI_BUS_DEVICE_NAME "System Bus" |
24 | ||
859ac9a4 BH |
25 | #define ACPI_IS_ROOT_DEVICE(device) (!(device)->parent) |
26 | ||
1da177e4 | 27 | static LIST_HEAD(acpi_device_list); |
e49bd2dd | 28 | static LIST_HEAD(acpi_bus_id_list); |
9090589d | 29 | DEFINE_MUTEX(acpi_device_lock); |
1da177e4 LT |
30 | LIST_HEAD(acpi_wakeup_device_list); |
31 | ||
e49bd2dd | 32 | struct acpi_device_bus_id{ |
bb095854 | 33 | char bus_id[15]; |
e49bd2dd ZR |
34 | unsigned int instance_no; |
35 | struct list_head node; | |
1da177e4 | 36 | }; |
29b71a1c TR |
37 | |
38 | /* | |
39 | * Creates hid/cid(s) string needed for modalias and uevent | |
40 | * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: | |
41 | * char *modalias: "acpi:IBM0001:ACPI0001" | |
42 | */ | |
b3e572d2 AB |
43 | static int create_modalias(struct acpi_device *acpi_dev, char *modalias, |
44 | int size) | |
45 | { | |
29b71a1c | 46 | int len; |
5c9fcb5d | 47 | int count; |
29b71a1c | 48 | |
5c9fcb5d | 49 | if (!acpi_dev->flags.hardware_id && !acpi_dev->flags.compatible_ids) |
29b71a1c TR |
50 | return -ENODEV; |
51 | ||
5c9fcb5d | 52 | len = snprintf(modalias, size, "acpi:"); |
29b71a1c TR |
53 | size -= len; |
54 | ||
5c9fcb5d ZR |
55 | if (acpi_dev->flags.hardware_id) { |
56 | count = snprintf(&modalias[len], size, "%s:", | |
57 | acpi_dev->pnp.hardware_id); | |
58 | if (count < 0 || count >= size) | |
59 | return -EINVAL; | |
60 | len += count; | |
61 | size -= count; | |
62 | } | |
63 | ||
29b71a1c | 64 | if (acpi_dev->flags.compatible_ids) { |
15b8dd53 | 65 | struct acpica_device_id_list *cid_list; |
29b71a1c | 66 | int i; |
29b71a1c TR |
67 | |
68 | cid_list = acpi_dev->pnp.cid_list; | |
69 | for (i = 0; i < cid_list->count; i++) { | |
70 | count = snprintf(&modalias[len], size, "%s:", | |
15b8dd53 | 71 | cid_list->ids[i].string); |
29b71a1c | 72 | if (count < 0 || count >= size) { |
87ecd5cd | 73 | printk(KERN_ERR PREFIX "%s cid[%i] exceeds event buffer size", |
29b71a1c TR |
74 | acpi_dev->pnp.device_name, i); |
75 | break; | |
76 | } | |
77 | len += count; | |
78 | size -= count; | |
79 | } | |
80 | } | |
81 | ||
82 | modalias[len] = '\0'; | |
83 | return len; | |
84 | } | |
85 | ||
86 | static ssize_t | |
87 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
88 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
89 | int len; | |
90 | ||
91 | /* Device has no HID and no CID or string is >1024 */ | |
92 | len = create_modalias(acpi_dev, buf, 1024); | |
93 | if (len <= 0) | |
94 | return 0; | |
95 | buf[len++] = '\n'; | |
96 | return len; | |
97 | } | |
98 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); | |
99 | ||
c8d72a5e | 100 | static void acpi_bus_hot_remove_device(void *context) |
1da177e4 | 101 | { |
26d46867 ZR |
102 | struct acpi_device *device; |
103 | acpi_handle handle = context; | |
1da177e4 LT |
104 | struct acpi_object_list arg_list; |
105 | union acpi_object arg; | |
106 | acpi_status status = AE_OK; | |
1da177e4 | 107 | |
26d46867 | 108 | if (acpi_bus_get_device(handle, &device)) |
c8d72a5e | 109 | return; |
26d46867 ZR |
110 | |
111 | if (!device) | |
c8d72a5e | 112 | return; |
26d46867 ZR |
113 | |
114 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
0794469d | 115 | "Hot-removing device %s...\n", dev_name(&device->dev))); |
26d46867 ZR |
116 | |
117 | if (acpi_bus_trim(device, 1)) { | |
55ac9a01 LM |
118 | printk(KERN_ERR PREFIX |
119 | "Removing device failed\n"); | |
c8d72a5e | 120 | return; |
26d46867 | 121 | } |
1da177e4 | 122 | |
26d46867 ZR |
123 | /* power off device */ |
124 | status = acpi_evaluate_object(handle, "_PS3", NULL, NULL); | |
125 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) | |
55ac9a01 LM |
126 | printk(KERN_WARNING PREFIX |
127 | "Power-off device failed\n"); | |
26d46867 ZR |
128 | |
129 | if (device->flags.lockable) { | |
1da177e4 LT |
130 | arg_list.count = 1; |
131 | arg_list.pointer = &arg; | |
132 | arg.type = ACPI_TYPE_INTEGER; | |
133 | arg.integer.value = 0; | |
134 | acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); | |
135 | } | |
1da177e4 | 136 | |
1da177e4 LT |
137 | arg_list.count = 1; |
138 | arg_list.pointer = &arg; | |
139 | arg.type = ACPI_TYPE_INTEGER; | |
140 | arg.integer.value = 1; | |
1da177e4 | 141 | |
1da177e4 LT |
142 | /* |
143 | * TBD: _EJD support. | |
144 | */ | |
1da177e4 | 145 | status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); |
26d46867 | 146 | if (ACPI_FAILURE(status)) |
c8d72a5e ZR |
147 | printk(KERN_WARNING PREFIX |
148 | "Eject device failed\n"); | |
1da177e4 | 149 | |
c8d72a5e | 150 | return; |
1da177e4 LT |
151 | } |
152 | ||
1da177e4 | 153 | static ssize_t |
f883d9db PM |
154 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
155 | const char *buf, size_t count) | |
1da177e4 | 156 | { |
4be44fcd | 157 | int ret = count; |
4be44fcd | 158 | acpi_status status; |
4be44fcd | 159 | acpi_object_type type = 0; |
f883d9db | 160 | struct acpi_device *acpi_device = to_acpi_device(d); |
1da177e4 | 161 | |
1da177e4 LT |
162 | if ((!count) || (buf[0] != '1')) { |
163 | return -EINVAL; | |
164 | } | |
1da177e4 | 165 | #ifndef FORCE_EJECT |
f883d9db | 166 | if (acpi_device->driver == NULL) { |
1da177e4 LT |
167 | ret = -ENODEV; |
168 | goto err; | |
169 | } | |
170 | #endif | |
f883d9db PM |
171 | status = acpi_get_type(acpi_device->handle, &type); |
172 | if (ACPI_FAILURE(status) || (!acpi_device->flags.ejectable)) { | |
1da177e4 LT |
173 | ret = -ENODEV; |
174 | goto err; | |
175 | } | |
1da177e4 | 176 | |
c8d72a5e | 177 | acpi_os_hotplug_execute(acpi_bus_hot_remove_device, acpi_device->handle); |
74523c90 | 178 | err: |
1da177e4 | 179 | return ret; |
1da177e4 LT |
180 | } |
181 | ||
f883d9db | 182 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
1da177e4 | 183 | |
e49bd2dd ZR |
184 | static ssize_t |
185 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
186 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1da177e4 | 187 | |
e49bd2dd | 188 | return sprintf(buf, "%s\n", acpi_dev->pnp.hardware_id); |
1da177e4 | 189 | } |
e49bd2dd | 190 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
1da177e4 | 191 | |
e49bd2dd ZR |
192 | static ssize_t |
193 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
194 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
195 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
196 | int result; | |
1da177e4 | 197 | |
e49bd2dd | 198 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
0c526d96 | 199 | if (result) |
e49bd2dd | 200 | goto end; |
1da177e4 | 201 | |
e49bd2dd ZR |
202 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
203 | kfree(path.pointer); | |
0c526d96 | 204 | end: |
e49bd2dd | 205 | return result; |
1da177e4 | 206 | } |
e49bd2dd | 207 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
1da177e4 | 208 | |
e49bd2dd | 209 | static int acpi_device_setup_files(struct acpi_device *dev) |
1da177e4 | 210 | { |
f883d9db PM |
211 | acpi_status status; |
212 | acpi_handle temp; | |
e49bd2dd | 213 | int result = 0; |
1da177e4 LT |
214 | |
215 | /* | |
e49bd2dd | 216 | * Devices gotten from FADT don't have a "path" attribute |
1da177e4 | 217 | */ |
0c526d96 | 218 | if (dev->handle) { |
e49bd2dd | 219 | result = device_create_file(&dev->dev, &dev_attr_path); |
0c526d96 | 220 | if (result) |
e49bd2dd | 221 | goto end; |
1da177e4 LT |
222 | } |
223 | ||
0c526d96 | 224 | if (dev->flags.hardware_id) { |
e49bd2dd | 225 | result = device_create_file(&dev->dev, &dev_attr_hid); |
0c526d96 | 226 | if (result) |
e49bd2dd ZR |
227 | goto end; |
228 | } | |
1da177e4 | 229 | |
0c526d96 | 230 | if (dev->flags.hardware_id || dev->flags.compatible_ids) { |
29b71a1c | 231 | result = device_create_file(&dev->dev, &dev_attr_modalias); |
0c526d96 | 232 | if (result) |
29b71a1c TR |
233 | goto end; |
234 | } | |
235 | ||
e49bd2dd ZR |
236 | /* |
237 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
238 | * hot-removal function from userland. | |
239 | */ | |
f883d9db PM |
240 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); |
241 | if (ACPI_SUCCESS(status)) | |
e49bd2dd | 242 | result = device_create_file(&dev->dev, &dev_attr_eject); |
0c526d96 | 243 | end: |
e49bd2dd | 244 | return result; |
1da177e4 LT |
245 | } |
246 | ||
f883d9db | 247 | static void acpi_device_remove_files(struct acpi_device *dev) |
1da177e4 | 248 | { |
f883d9db PM |
249 | acpi_status status; |
250 | acpi_handle temp; | |
1da177e4 | 251 | |
f883d9db PM |
252 | /* |
253 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
254 | * hot-removal function from userland. | |
255 | */ | |
256 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); | |
257 | if (ACPI_SUCCESS(status)) | |
258 | device_remove_file(&dev->dev, &dev_attr_eject); | |
1da177e4 | 259 | |
29b71a1c TR |
260 | if (dev->flags.hardware_id || dev->flags.compatible_ids) |
261 | device_remove_file(&dev->dev, &dev_attr_modalias); | |
262 | ||
0c526d96 | 263 | if (dev->flags.hardware_id) |
e49bd2dd | 264 | device_remove_file(&dev->dev, &dev_attr_hid); |
0c526d96 | 265 | if (dev->handle) |
e49bd2dd | 266 | device_remove_file(&dev->dev, &dev_attr_path); |
1da177e4 | 267 | } |
1da177e4 | 268 | /* -------------------------------------------------------------------------- |
9e89dde2 | 269 | ACPI Bus operations |
1da177e4 | 270 | -------------------------------------------------------------------------- */ |
29b71a1c TR |
271 | |
272 | int acpi_match_device_ids(struct acpi_device *device, | |
273 | const struct acpi_device_id *ids) | |
274 | { | |
275 | const struct acpi_device_id *id; | |
276 | ||
39a0ad87 ZY |
277 | /* |
278 | * If the device is not present, it is unnecessary to load device | |
279 | * driver for it. | |
280 | */ | |
281 | if (!device->status.present) | |
282 | return -ENODEV; | |
283 | ||
29b71a1c TR |
284 | if (device->flags.hardware_id) { |
285 | for (id = ids; id->id[0]; id++) { | |
286 | if (!strcmp((char*)id->id, device->pnp.hardware_id)) | |
287 | return 0; | |
288 | } | |
289 | } | |
290 | ||
291 | if (device->flags.compatible_ids) { | |
15b8dd53 | 292 | struct acpica_device_id_list *cid_list = device->pnp.cid_list; |
29b71a1c TR |
293 | int i; |
294 | ||
295 | for (id = ids; id->id[0]; id++) { | |
296 | /* compare multiple _CID entries against driver ids */ | |
297 | for (i = 0; i < cid_list->count; i++) { | |
298 | if (!strcmp((char*)id->id, | |
15b8dd53 | 299 | cid_list->ids[i].string)) |
29b71a1c TR |
300 | return 0; |
301 | } | |
302 | } | |
303 | } | |
304 | ||
305 | return -ENOENT; | |
306 | } | |
307 | EXPORT_SYMBOL(acpi_match_device_ids); | |
308 | ||
1890a97a | 309 | static void acpi_device_release(struct device *dev) |
1da177e4 | 310 | { |
1890a97a | 311 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 312 | |
1890a97a | 313 | kfree(acpi_dev->pnp.cid_list); |
718fb0de HD |
314 | if (acpi_dev->flags.hardware_id) |
315 | kfree(acpi_dev->pnp.hardware_id); | |
316 | if (acpi_dev->flags.unique_id) | |
317 | kfree(acpi_dev->pnp.unique_id); | |
1890a97a | 318 | kfree(acpi_dev); |
1da177e4 LT |
319 | } |
320 | ||
5d9464a4 | 321 | static int acpi_device_suspend(struct device *dev, pm_message_t state) |
1da177e4 | 322 | { |
5d9464a4 PM |
323 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
324 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
1da177e4 | 325 | |
5d9464a4 PM |
326 | if (acpi_drv && acpi_drv->ops.suspend) |
327 | return acpi_drv->ops.suspend(acpi_dev, state); | |
1da177e4 LT |
328 | return 0; |
329 | } | |
1da177e4 | 330 | |
5d9464a4 | 331 | static int acpi_device_resume(struct device *dev) |
9e89dde2 | 332 | { |
5d9464a4 PM |
333 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
334 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
1da177e4 | 335 | |
5d9464a4 PM |
336 | if (acpi_drv && acpi_drv->ops.resume) |
337 | return acpi_drv->ops.resume(acpi_dev); | |
d550d98d | 338 | return 0; |
1da177e4 LT |
339 | } |
340 | ||
5d9464a4 | 341 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 342 | { |
5d9464a4 PM |
343 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
344 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
1da177e4 | 345 | |
29b71a1c | 346 | return !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
5d9464a4 | 347 | } |
1da177e4 | 348 | |
7eff2e7a | 349 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 | 350 | { |
5d9464a4 | 351 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
7eff2e7a | 352 | int len; |
5d9464a4 | 353 | |
7eff2e7a KS |
354 | if (add_uevent_var(env, "MODALIAS=")) |
355 | return -ENOMEM; | |
356 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], | |
357 | sizeof(env->buf) - env->buflen); | |
358 | if (len >= (sizeof(env->buf) - env->buflen)) | |
359 | return -ENOMEM; | |
360 | env->buflen += len; | |
9e89dde2 | 361 | return 0; |
1da177e4 LT |
362 | } |
363 | ||
46ec8598 BH |
364 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
365 | { | |
366 | struct acpi_device *device = data; | |
367 | ||
368 | device->driver->ops.notify(device, event); | |
369 | } | |
370 | ||
371 | static acpi_status acpi_device_notify_fixed(void *data) | |
372 | { | |
373 | struct acpi_device *device = data; | |
374 | ||
53de5356 BH |
375 | /* Fixed hardware devices have no handles */ |
376 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); | |
46ec8598 BH |
377 | return AE_OK; |
378 | } | |
379 | ||
380 | static int acpi_device_install_notify_handler(struct acpi_device *device) | |
381 | { | |
382 | acpi_status status; | |
46ec8598 | 383 | |
ccba2a36 | 384 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
385 | status = |
386 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
387 | acpi_device_notify_fixed, | |
388 | device); | |
ccba2a36 | 389 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
390 | status = |
391 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
392 | acpi_device_notify_fixed, | |
393 | device); | |
394 | else | |
395 | status = acpi_install_notify_handler(device->handle, | |
396 | ACPI_DEVICE_NOTIFY, | |
397 | acpi_device_notify, | |
398 | device); | |
399 | ||
400 | if (ACPI_FAILURE(status)) | |
401 | return -EINVAL; | |
402 | return 0; | |
403 | } | |
404 | ||
405 | static void acpi_device_remove_notify_handler(struct acpi_device *device) | |
406 | { | |
ccba2a36 | 407 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
408 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, |
409 | acpi_device_notify_fixed); | |
ccba2a36 | 410 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
411 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, |
412 | acpi_device_notify_fixed); | |
413 | else | |
414 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, | |
415 | acpi_device_notify); | |
416 | } | |
417 | ||
5d9464a4 PM |
418 | static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *); |
419 | static int acpi_start_single_object(struct acpi_device *); | |
420 | static int acpi_device_probe(struct device * dev) | |
1da177e4 | 421 | { |
5d9464a4 PM |
422 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
423 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
424 | int ret; | |
425 | ||
426 | ret = acpi_bus_driver_init(acpi_dev, acpi_drv); | |
427 | if (!ret) { | |
c4168bff LS |
428 | if (acpi_dev->bus_ops.acpi_op_start) |
429 | acpi_start_single_object(acpi_dev); | |
46ec8598 BH |
430 | |
431 | if (acpi_drv->ops.notify) { | |
432 | ret = acpi_device_install_notify_handler(acpi_dev); | |
433 | if (ret) { | |
46ec8598 BH |
434 | if (acpi_drv->ops.remove) |
435 | acpi_drv->ops.remove(acpi_dev, | |
436 | acpi_dev->removal_type); | |
437 | return ret; | |
438 | } | |
439 | } | |
440 | ||
5d9464a4 PM |
441 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
442 | "Found driver [%s] for device [%s]\n", | |
443 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
444 | get_device(dev); | |
445 | } | |
446 | return ret; | |
447 | } | |
1da177e4 | 448 | |
5d9464a4 PM |
449 | static int acpi_device_remove(struct device * dev) |
450 | { | |
451 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
452 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
453 | ||
454 | if (acpi_drv) { | |
46ec8598 BH |
455 | if (acpi_drv->ops.notify) |
456 | acpi_device_remove_notify_handler(acpi_dev); | |
5d9464a4 | 457 | if (acpi_drv->ops.remove) |
96333578 | 458 | acpi_drv->ops.remove(acpi_dev, acpi_dev->removal_type); |
1da177e4 | 459 | } |
5d9464a4 | 460 | acpi_dev->driver = NULL; |
db89b4f0 | 461 | acpi_dev->driver_data = NULL; |
1da177e4 | 462 | |
5d9464a4 | 463 | put_device(dev); |
9e89dde2 ZR |
464 | return 0; |
465 | } | |
1da177e4 | 466 | |
55955aad | 467 | struct bus_type acpi_bus_type = { |
9e89dde2 ZR |
468 | .name = "acpi", |
469 | .suspend = acpi_device_suspend, | |
470 | .resume = acpi_device_resume, | |
5d9464a4 PM |
471 | .match = acpi_bus_match, |
472 | .probe = acpi_device_probe, | |
473 | .remove = acpi_device_remove, | |
474 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
475 | }; |
476 | ||
66b7ed40 | 477 | static int acpi_device_register(struct acpi_device *device) |
1da177e4 | 478 | { |
4be44fcd | 479 | int result; |
e49bd2dd ZR |
480 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
481 | int found = 0; | |
66b7ed40 | 482 | |
9e89dde2 ZR |
483 | /* |
484 | * Linkage | |
485 | * ------- | |
486 | * Link this device to its parent and siblings. | |
487 | */ | |
488 | INIT_LIST_HEAD(&device->children); | |
489 | INIT_LIST_HEAD(&device->node); | |
9e89dde2 | 490 | INIT_LIST_HEAD(&device->wakeup_list); |
1da177e4 | 491 | |
e49bd2dd ZR |
492 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
493 | if (!new_bus_id) { | |
494 | printk(KERN_ERR PREFIX "Memory allocation error\n"); | |
495 | return -ENOMEM; | |
1da177e4 | 496 | } |
e49bd2dd | 497 | |
9090589d | 498 | mutex_lock(&acpi_device_lock); |
e49bd2dd ZR |
499 | /* |
500 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
501 | * If failed, create one and link it into acpi_bus_id_list | |
502 | */ | |
503 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
bb095854 | 504 | if(!strcmp(acpi_device_bus_id->bus_id, device->flags.hardware_id? device->pnp.hardware_id : "device")) { |
e49bd2dd ZR |
505 | acpi_device_bus_id->instance_no ++; |
506 | found = 1; | |
507 | kfree(new_bus_id); | |
508 | break; | |
509 | } | |
1da177e4 | 510 | } |
0c526d96 | 511 | if (!found) { |
e49bd2dd | 512 | acpi_device_bus_id = new_bus_id; |
bb095854 | 513 | strcpy(acpi_device_bus_id->bus_id, device->flags.hardware_id ? device->pnp.hardware_id : "device"); |
e49bd2dd ZR |
514 | acpi_device_bus_id->instance_no = 0; |
515 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 516 | } |
0794469d | 517 | dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 518 | |
33b57150 | 519 | if (device->parent) |
9e89dde2 | 520 | list_add_tail(&device->node, &device->parent->children); |
33b57150 | 521 | |
9e89dde2 ZR |
522 | if (device->wakeup.flags.valid) |
523 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
9090589d | 524 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 525 | |
1890a97a | 526 | if (device->parent) |
66b7ed40 | 527 | device->dev.parent = &device->parent->dev; |
1890a97a | 528 | device->dev.bus = &acpi_bus_type; |
1890a97a | 529 | device->dev.release = &acpi_device_release; |
8b12b922 | 530 | result = device_register(&device->dev); |
0c526d96 | 531 | if (result) { |
8b12b922 | 532 | dev_err(&device->dev, "Error registering device\n"); |
e49bd2dd | 533 | goto end; |
1da177e4 | 534 | } |
1da177e4 | 535 | |
e49bd2dd | 536 | result = acpi_device_setup_files(device); |
0c526d96 | 537 | if (result) |
0794469d KS |
538 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
539 | dev_name(&device->dev)); | |
1da177e4 | 540 | |
96333578 | 541 | device->removal_type = ACPI_BUS_REMOVAL_NORMAL; |
1da177e4 | 542 | return 0; |
0c526d96 | 543 | end: |
9090589d | 544 | mutex_lock(&acpi_device_lock); |
33b57150 | 545 | if (device->parent) |
e49bd2dd | 546 | list_del(&device->node); |
e49bd2dd | 547 | list_del(&device->wakeup_list); |
9090589d | 548 | mutex_unlock(&acpi_device_lock); |
e49bd2dd | 549 | return result; |
1da177e4 LT |
550 | } |
551 | ||
9e89dde2 ZR |
552 | static void acpi_device_unregister(struct acpi_device *device, int type) |
553 | { | |
9090589d | 554 | mutex_lock(&acpi_device_lock); |
33b57150 | 555 | if (device->parent) |
9e89dde2 | 556 | list_del(&device->node); |
1da177e4 | 557 | |
9e89dde2 | 558 | list_del(&device->wakeup_list); |
9090589d | 559 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 560 | |
9e89dde2 | 561 | acpi_detach_data(device->handle, acpi_bus_data_handler); |
1890a97a | 562 | |
f883d9db | 563 | acpi_device_remove_files(device); |
1890a97a | 564 | device_unregister(&device->dev); |
1da177e4 LT |
565 | } |
566 | ||
9e89dde2 ZR |
567 | /* -------------------------------------------------------------------------- |
568 | Driver Management | |
569 | -------------------------------------------------------------------------- */ | |
1da177e4 | 570 | /** |
d758a8fa RD |
571 | * acpi_bus_driver_init - add a device to a driver |
572 | * @device: the device to add and initialize | |
573 | * @driver: driver for the device | |
574 | * | |
0c526d96 | 575 | * Used to initialize a device via its device driver. Called whenever a |
1890a97a | 576 | * driver is bound to a device. Invokes the driver's add() ops. |
1da177e4 LT |
577 | */ |
578 | static int | |
4be44fcd | 579 | acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) |
1da177e4 | 580 | { |
4be44fcd | 581 | int result = 0; |
1da177e4 | 582 | |
1da177e4 | 583 | if (!device || !driver) |
d550d98d | 584 | return -EINVAL; |
1da177e4 LT |
585 | |
586 | if (!driver->ops.add) | |
d550d98d | 587 | return -ENOSYS; |
1da177e4 LT |
588 | |
589 | result = driver->ops.add(device); | |
590 | if (result) { | |
591 | device->driver = NULL; | |
db89b4f0 | 592 | device->driver_data = NULL; |
d550d98d | 593 | return result; |
1da177e4 LT |
594 | } |
595 | ||
596 | device->driver = driver; | |
597 | ||
598 | /* | |
599 | * TBD - Configuration Management: Assign resources to device based | |
600 | * upon possible configuration and currently allocated resources. | |
601 | */ | |
602 | ||
4be44fcd LB |
603 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
604 | "Driver successfully bound to device\n")); | |
d550d98d | 605 | return 0; |
3fb02738 RS |
606 | } |
607 | ||
8713cbef | 608 | static int acpi_start_single_object(struct acpi_device *device) |
3fb02738 RS |
609 | { |
610 | int result = 0; | |
611 | struct acpi_driver *driver; | |
612 | ||
3fb02738 RS |
613 | |
614 | if (!(driver = device->driver)) | |
d550d98d | 615 | return 0; |
3fb02738 | 616 | |
1da177e4 LT |
617 | if (driver->ops.start) { |
618 | result = driver->ops.start(device); | |
619 | if (result && driver->ops.remove) | |
620 | driver->ops.remove(device, ACPI_BUS_REMOVAL_NORMAL); | |
1da177e4 LT |
621 | } |
622 | ||
d550d98d | 623 | return result; |
1da177e4 LT |
624 | } |
625 | ||
9e89dde2 ZR |
626 | /** |
627 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
628 | * @driver: driver being registered | |
629 | * | |
630 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
631 | * devices that match the driver's criteria and binds. Returns zero for | |
632 | * success or a negative error status for failure. | |
633 | */ | |
634 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
1da177e4 | 635 | { |
1890a97a | 636 | int ret; |
1da177e4 | 637 | |
9e89dde2 ZR |
638 | if (acpi_disabled) |
639 | return -ENODEV; | |
1890a97a PM |
640 | driver->drv.name = driver->name; |
641 | driver->drv.bus = &acpi_bus_type; | |
642 | driver->drv.owner = driver->owner; | |
1da177e4 | 643 | |
1890a97a PM |
644 | ret = driver_register(&driver->drv); |
645 | return ret; | |
9e89dde2 | 646 | } |
1da177e4 | 647 | |
9e89dde2 ZR |
648 | EXPORT_SYMBOL(acpi_bus_register_driver); |
649 | ||
650 | /** | |
651 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus | |
652 | * @driver: driver to unregister | |
653 | * | |
654 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
655 | * devices that match the driver's criteria and unbinds. | |
656 | */ | |
657 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
658 | { | |
1890a97a | 659 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
660 | } |
661 | ||
662 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
663 | ||
9e89dde2 ZR |
664 | /* -------------------------------------------------------------------------- |
665 | Device Enumeration | |
666 | -------------------------------------------------------------------------- */ | |
5c478f49 BH |
667 | static struct acpi_device *acpi_bus_get_parent(acpi_handle handle) |
668 | { | |
669 | acpi_status status; | |
670 | int ret; | |
671 | struct acpi_device *device; | |
672 | ||
673 | /* | |
674 | * Fixed hardware devices do not appear in the namespace and do not | |
675 | * have handles, but we fabricate acpi_devices for them, so we have | |
676 | * to deal with them specially. | |
677 | */ | |
678 | if (handle == NULL) | |
679 | return acpi_root; | |
680 | ||
681 | do { | |
682 | status = acpi_get_parent(handle, &handle); | |
683 | if (status == AE_NULL_ENTRY) | |
684 | return NULL; | |
685 | if (ACPI_FAILURE(status)) | |
686 | return acpi_root; | |
687 | ||
688 | ret = acpi_bus_get_device(handle, &device); | |
689 | if (ret == 0) | |
690 | return device; | |
691 | } while (1); | |
692 | } | |
693 | ||
9e89dde2 ZR |
694 | acpi_status |
695 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
696 | { | |
697 | acpi_status status; | |
698 | acpi_handle tmp; | |
699 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
700 | union acpi_object *obj; | |
701 | ||
702 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
703 | if (ACPI_FAILURE(status)) | |
704 | return status; | |
705 | ||
706 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
707 | if (ACPI_SUCCESS(status)) { | |
708 | obj = buffer.pointer; | |
3b5fee59 HM |
709 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
710 | ejd); | |
9e89dde2 ZR |
711 | kfree(buffer.pointer); |
712 | } | |
713 | return status; | |
714 | } | |
715 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
716 | ||
8e4319c4 | 717 | void acpi_bus_data_handler(acpi_handle handle, void *context) |
9e89dde2 ZR |
718 | { |
719 | ||
720 | /* TBD */ | |
721 | ||
722 | return; | |
723 | } | |
724 | ||
9e89dde2 ZR |
725 | static int acpi_bus_get_perf_flags(struct acpi_device *device) |
726 | { | |
727 | device->performance.state = ACPI_STATE_UNKNOWN; | |
728 | return 0; | |
729 | } | |
730 | ||
731 | static acpi_status | |
732 | acpi_bus_extract_wakeup_device_power_package(struct acpi_device *device, | |
733 | union acpi_object *package) | |
734 | { | |
735 | int i = 0; | |
736 | union acpi_object *element = NULL; | |
737 | ||
738 | if (!device || !package || (package->package.count < 2)) | |
739 | return AE_BAD_PARAMETER; | |
740 | ||
741 | element = &(package->package.elements[0]); | |
742 | if (!element) | |
743 | return AE_BAD_PARAMETER; | |
744 | if (element->type == ACPI_TYPE_PACKAGE) { | |
745 | if ((element->package.count < 2) || | |
746 | (element->package.elements[0].type != | |
747 | ACPI_TYPE_LOCAL_REFERENCE) | |
748 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) | |
749 | return AE_BAD_DATA; | |
750 | device->wakeup.gpe_device = | |
751 | element->package.elements[0].reference.handle; | |
752 | device->wakeup.gpe_number = | |
753 | (u32) element->package.elements[1].integer.value; | |
754 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
755 | device->wakeup.gpe_number = element->integer.value; | |
756 | } else | |
757 | return AE_BAD_DATA; | |
758 | ||
759 | element = &(package->package.elements[1]); | |
760 | if (element->type != ACPI_TYPE_INTEGER) { | |
761 | return AE_BAD_DATA; | |
762 | } | |
763 | device->wakeup.sleep_state = element->integer.value; | |
764 | ||
765 | if ((package->package.count - 2) > ACPI_MAX_HANDLES) { | |
766 | return AE_NO_MEMORY; | |
767 | } | |
768 | device->wakeup.resources.count = package->package.count - 2; | |
769 | for (i = 0; i < device->wakeup.resources.count; i++) { | |
770 | element = &(package->package.elements[i + 2]); | |
cd0b2248 | 771 | if (element->type != ACPI_TYPE_LOCAL_REFERENCE) |
9e89dde2 | 772 | return AE_BAD_DATA; |
9e89dde2 ZR |
773 | |
774 | device->wakeup.resources.handles[i] = element->reference.handle; | |
1da177e4 | 775 | } |
9e89dde2 ZR |
776 | |
777 | return AE_OK; | |
1da177e4 LT |
778 | } |
779 | ||
9e89dde2 | 780 | static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
1da177e4 | 781 | { |
9e89dde2 ZR |
782 | acpi_status status = 0; |
783 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
784 | union acpi_object *package = NULL; | |
77e76609 | 785 | int psw_error; |
1da177e4 | 786 | |
29b71a1c TR |
787 | struct acpi_device_id button_device_ids[] = { |
788 | {"PNP0C0D", 0}, | |
789 | {"PNP0C0C", 0}, | |
790 | {"PNP0C0E", 0}, | |
791 | {"", 0}, | |
792 | }; | |
793 | ||
9e89dde2 ZR |
794 | /* _PRW */ |
795 | status = acpi_evaluate_object(device->handle, "_PRW", NULL, &buffer); | |
796 | if (ACPI_FAILURE(status)) { | |
797 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
798 | goto end; | |
1da177e4 | 799 | } |
1da177e4 | 800 | |
9e89dde2 ZR |
801 | package = (union acpi_object *)buffer.pointer; |
802 | status = acpi_bus_extract_wakeup_device_power_package(device, package); | |
803 | if (ACPI_FAILURE(status)) { | |
804 | ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package")); | |
805 | goto end; | |
806 | } | |
1da177e4 | 807 | |
9e89dde2 | 808 | kfree(buffer.pointer); |
1da177e4 | 809 | |
9e89dde2 | 810 | device->wakeup.flags.valid = 1; |
9b83ccd2 | 811 | device->wakeup.prepare_count = 0; |
729b2bdb ZY |
812 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
813 | * system for the ACPI device with the _PRW object. | |
814 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. | |
815 | * So it is necessary to call _DSW object first. Only when it is not | |
816 | * present will the _PSW object used. | |
817 | */ | |
77e76609 RW |
818 | psw_error = acpi_device_sleep_wake(device, 0, 0, 0); |
819 | if (psw_error) | |
820 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
821 | "error in _DSW or _PSW evaluation\n")); | |
822 | ||
9e89dde2 | 823 | /* Power button, Lid switch always enable wakeup */ |
29b71a1c | 824 | if (!acpi_match_device_ids(device, button_device_ids)) |
9e89dde2 | 825 | device->wakeup.flags.run_wake = 1; |
1da177e4 | 826 | |
0c526d96 | 827 | end: |
9e89dde2 ZR |
828 | if (ACPI_FAILURE(status)) |
829 | device->flags.wake_capable = 0; | |
d550d98d | 830 | return 0; |
1da177e4 | 831 | } |
1da177e4 | 832 | |
9e89dde2 | 833 | static int acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 834 | { |
9e89dde2 ZR |
835 | acpi_status status = 0; |
836 | acpi_handle handle = NULL; | |
837 | u32 i = 0; | |
1a365616 | 838 | |
4be44fcd | 839 | |
9e89dde2 ZR |
840 | /* |
841 | * Power Management Flags | |
842 | */ | |
843 | status = acpi_get_handle(device->handle, "_PSC", &handle); | |
844 | if (ACPI_SUCCESS(status)) | |
845 | device->power.flags.explicit_get = 1; | |
846 | status = acpi_get_handle(device->handle, "_IRC", &handle); | |
847 | if (ACPI_SUCCESS(status)) | |
848 | device->power.flags.inrush_current = 1; | |
1da177e4 | 849 | |
9e89dde2 ZR |
850 | /* |
851 | * Enumerate supported power management states | |
852 | */ | |
853 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3; i++) { | |
854 | struct acpi_device_power_state *ps = &device->power.states[i]; | |
855 | char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' }; | |
1da177e4 | 856 | |
9e89dde2 ZR |
857 | /* Evaluate "_PRx" to se if power resources are referenced */ |
858 | acpi_evaluate_reference(device->handle, object_name, NULL, | |
859 | &ps->resources); | |
860 | if (ps->resources.count) { | |
861 | device->power.flags.power_resources = 1; | |
862 | ps->flags.valid = 1; | |
1da177e4 | 863 | } |
1da177e4 | 864 | |
9e89dde2 ZR |
865 | /* Evaluate "_PSx" to see if we can do explicit sets */ |
866 | object_name[2] = 'S'; | |
867 | status = acpi_get_handle(device->handle, object_name, &handle); | |
868 | if (ACPI_SUCCESS(status)) { | |
869 | ps->flags.explicit_set = 1; | |
870 | ps->flags.valid = 1; | |
1da177e4 | 871 | } |
1da177e4 | 872 | |
9e89dde2 ZR |
873 | /* State is valid if we have some power control */ |
874 | if (ps->resources.count || ps->flags.explicit_set) | |
875 | ps->flags.valid = 1; | |
1da177e4 | 876 | |
9e89dde2 ZR |
877 | ps->power = -1; /* Unknown - driver assigned */ |
878 | ps->latency = -1; /* Unknown - driver assigned */ | |
879 | } | |
1da177e4 | 880 | |
9e89dde2 ZR |
881 | /* Set defaults for D0 and D3 states (always valid) */ |
882 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
883 | device->power.states[ACPI_STATE_D0].power = 100; | |
884 | device->power.states[ACPI_STATE_D3].flags.valid = 1; | |
885 | device->power.states[ACPI_STATE_D3].power = 0; | |
c8f7a62c | 886 | |
9e89dde2 | 887 | /* TBD: System wake support and resource requirements. */ |
c8f7a62c | 888 | |
9e89dde2 | 889 | device->power.state = ACPI_STATE_UNKNOWN; |
a51e145f | 890 | acpi_bus_get_power(device->handle, &(device->power.state)); |
c8f7a62c | 891 | |
9e89dde2 ZR |
892 | return 0; |
893 | } | |
c8f7a62c | 894 | |
4be44fcd | 895 | static int acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 896 | { |
4be44fcd LB |
897 | acpi_status status = AE_OK; |
898 | acpi_handle temp = NULL; | |
1da177e4 | 899 | |
1da177e4 LT |
900 | |
901 | /* Presence of _STA indicates 'dynamic_status' */ | |
902 | status = acpi_get_handle(device->handle, "_STA", &temp); | |
903 | if (ACPI_SUCCESS(status)) | |
904 | device->flags.dynamic_status = 1; | |
905 | ||
906 | /* Presence of _CID indicates 'compatible_ids' */ | |
907 | status = acpi_get_handle(device->handle, "_CID", &temp); | |
908 | if (ACPI_SUCCESS(status)) | |
909 | device->flags.compatible_ids = 1; | |
910 | ||
911 | /* Presence of _RMV indicates 'removable' */ | |
912 | status = acpi_get_handle(device->handle, "_RMV", &temp); | |
913 | if (ACPI_SUCCESS(status)) | |
914 | device->flags.removable = 1; | |
915 | ||
916 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
917 | status = acpi_get_handle(device->handle, "_EJD", &temp); | |
918 | if (ACPI_SUCCESS(status)) | |
919 | device->flags.ejectable = 1; | |
920 | else { | |
921 | status = acpi_get_handle(device->handle, "_EJ0", &temp); | |
922 | if (ACPI_SUCCESS(status)) | |
923 | device->flags.ejectable = 1; | |
924 | } | |
925 | ||
926 | /* Presence of _LCK indicates 'lockable' */ | |
927 | status = acpi_get_handle(device->handle, "_LCK", &temp); | |
928 | if (ACPI_SUCCESS(status)) | |
929 | device->flags.lockable = 1; | |
930 | ||
931 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ | |
932 | status = acpi_get_handle(device->handle, "_PS0", &temp); | |
933 | if (ACPI_FAILURE(status)) | |
934 | status = acpi_get_handle(device->handle, "_PR0", &temp); | |
935 | if (ACPI_SUCCESS(status)) | |
936 | device->flags.power_manageable = 1; | |
937 | ||
938 | /* Presence of _PRW indicates wake capable */ | |
939 | status = acpi_get_handle(device->handle, "_PRW", &temp); | |
940 | if (ACPI_SUCCESS(status)) | |
941 | device->flags.wake_capable = 1; | |
942 | ||
3c5f9be4 | 943 | /* TBD: Performance management */ |
1da177e4 | 944 | |
d550d98d | 945 | return 0; |
1da177e4 LT |
946 | } |
947 | ||
c7bcb4e9 | 948 | static void acpi_device_get_busid(struct acpi_device *device) |
1da177e4 | 949 | { |
4be44fcd LB |
950 | char bus_id[5] = { '?', 0 }; |
951 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
952 | int i = 0; | |
1da177e4 LT |
953 | |
954 | /* | |
955 | * Bus ID | |
956 | * ------ | |
957 | * The device's Bus ID is simply the object name. | |
958 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
959 | */ | |
859ac9a4 | 960 | if (ACPI_IS_ROOT_DEVICE(device)) { |
1da177e4 | 961 | strcpy(device->pnp.bus_id, "ACPI"); |
859ac9a4 BH |
962 | return; |
963 | } | |
964 | ||
965 | switch (device->device_type) { | |
1da177e4 LT |
966 | case ACPI_BUS_TYPE_POWER_BUTTON: |
967 | strcpy(device->pnp.bus_id, "PWRF"); | |
968 | break; | |
969 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
970 | strcpy(device->pnp.bus_id, "SLPF"); | |
971 | break; | |
972 | default: | |
66b7ed40 | 973 | acpi_get_name(device->handle, ACPI_SINGLE_NAME, &buffer); |
1da177e4 LT |
974 | /* Clean up trailing underscores (if any) */ |
975 | for (i = 3; i > 1; i--) { | |
976 | if (bus_id[i] == '_') | |
977 | bus_id[i] = '\0'; | |
978 | else | |
979 | break; | |
980 | } | |
981 | strcpy(device->pnp.bus_id, bus_id); | |
982 | break; | |
983 | } | |
984 | } | |
985 | ||
54735266 ZR |
986 | /* |
987 | * acpi_bay_match - see if a device is an ejectable driver bay | |
988 | * | |
989 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
990 | * then we can safely call it an ejectable drive bay | |
991 | */ | |
992 | static int acpi_bay_match(struct acpi_device *device){ | |
993 | acpi_status status; | |
994 | acpi_handle handle; | |
995 | acpi_handle tmp; | |
996 | acpi_handle phandle; | |
997 | ||
998 | handle = device->handle; | |
999 | ||
1000 | status = acpi_get_handle(handle, "_EJ0", &tmp); | |
1001 | if (ACPI_FAILURE(status)) | |
1002 | return -ENODEV; | |
1003 | ||
1004 | if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || | |
1005 | (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || | |
1006 | (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || | |
1007 | (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) | |
1008 | return 0; | |
1009 | ||
1010 | if (acpi_get_parent(handle, &phandle)) | |
1011 | return -ENODEV; | |
1012 | ||
1013 | if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) || | |
1014 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) || | |
1015 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) || | |
1016 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp)))) | |
1017 | return 0; | |
1018 | ||
1019 | return -ENODEV; | |
1020 | } | |
1021 | ||
3620f2f2 FS |
1022 | /* |
1023 | * acpi_dock_match - see if a device has a _DCK method | |
1024 | */ | |
1025 | static int acpi_dock_match(struct acpi_device *device) | |
1026 | { | |
1027 | acpi_handle tmp; | |
1028 | return acpi_get_handle(device->handle, "_DCK", &tmp); | |
1029 | } | |
1030 | ||
15b8dd53 BM |
1031 | static struct acpica_device_id_list* |
1032 | acpi_add_cid( | |
1033 | struct acpi_device_info *info, | |
1034 | struct acpica_device_id *new_cid) | |
1035 | { | |
1036 | struct acpica_device_id_list *cid; | |
1037 | char *next_id_string; | |
1038 | acpi_size cid_length; | |
1039 | acpi_size new_cid_length; | |
1040 | u32 i; | |
1041 | ||
1042 | ||
1043 | /* Allocate new CID list with room for the new CID */ | |
1044 | ||
1045 | if (!new_cid) | |
1046 | new_cid_length = info->compatible_id_list.list_size; | |
1047 | else if (info->compatible_id_list.list_size) | |
1048 | new_cid_length = info->compatible_id_list.list_size + | |
1049 | new_cid->length + sizeof(struct acpica_device_id); | |
1050 | else | |
1051 | new_cid_length = sizeof(struct acpica_device_id_list) + new_cid->length; | |
1052 | ||
1053 | cid = ACPI_ALLOCATE_ZEROED(new_cid_length); | |
1054 | if (!cid) { | |
1055 | return NULL; | |
1056 | } | |
1057 | ||
1058 | cid->list_size = new_cid_length; | |
1059 | cid->count = info->compatible_id_list.count; | |
1060 | if (new_cid) | |
1061 | cid->count++; | |
1062 | next_id_string = (char *) cid->ids + (cid->count * sizeof(struct acpica_device_id)); | |
1063 | ||
1064 | /* Copy all existing CIDs */ | |
1065 | ||
1066 | for (i = 0; i < info->compatible_id_list.count; i++) { | |
1067 | cid_length = info->compatible_id_list.ids[i].length; | |
1068 | cid->ids[i].string = next_id_string; | |
1069 | cid->ids[i].length = cid_length; | |
1070 | ||
1071 | ACPI_MEMCPY(next_id_string, info->compatible_id_list.ids[i].string, | |
1072 | cid_length); | |
1073 | ||
1074 | next_id_string += cid_length; | |
1075 | } | |
1076 | ||
1077 | /* Append the new CID */ | |
1078 | ||
1079 | if (new_cid) { | |
1080 | cid->ids[i].string = next_id_string; | |
1081 | cid->ids[i].length = new_cid->length; | |
1082 | ||
1083 | ACPI_MEMCPY(next_id_string, new_cid->string, new_cid->length); | |
1084 | } | |
1085 | ||
1086 | return cid; | |
1087 | } | |
1088 | ||
c7bcb4e9 | 1089 | static void acpi_device_set_id(struct acpi_device *device) |
1da177e4 | 1090 | { |
15b8dd53 | 1091 | struct acpi_device_info *info = NULL; |
4be44fcd LB |
1092 | char *hid = NULL; |
1093 | char *uid = NULL; | |
15b8dd53 BM |
1094 | struct acpica_device_id_list *cid_list = NULL; |
1095 | char *cid_add = NULL; | |
4be44fcd | 1096 | acpi_status status; |
1da177e4 | 1097 | |
c7bcb4e9 | 1098 | switch (device->device_type) { |
1da177e4 | 1099 | case ACPI_BUS_TYPE_DEVICE: |
859ac9a4 BH |
1100 | if (ACPI_IS_ROOT_DEVICE(device)) { |
1101 | hid = ACPI_SYSTEM_HID; | |
1102 | break; | |
1103 | } | |
1104 | ||
66b7ed40 | 1105 | status = acpi_get_object_info(device->handle, &info); |
1da177e4 | 1106 | if (ACPI_FAILURE(status)) { |
96b2dd1f | 1107 | printk(KERN_ERR PREFIX "%s: Error reading device info\n", __func__); |
1da177e4 LT |
1108 | return; |
1109 | } | |
1110 | ||
1da177e4 | 1111 | if (info->valid & ACPI_VALID_HID) |
15b8dd53 | 1112 | hid = info->hardware_id.string; |
1da177e4 | 1113 | if (info->valid & ACPI_VALID_UID) |
15b8dd53 | 1114 | uid = info->unique_id.string; |
1da177e4 | 1115 | if (info->valid & ACPI_VALID_CID) |
15b8dd53 | 1116 | cid_list = &info->compatible_id_list; |
1da177e4 LT |
1117 | if (info->valid & ACPI_VALID_ADR) { |
1118 | device->pnp.bus_address = info->address; | |
1119 | device->flags.bus_address = 1; | |
1120 | } | |
ae843332 | 1121 | |
3620f2f2 FS |
1122 | /* If we have a video/bay/dock device, add our selfdefined |
1123 | HID to the CID list. Like that the video/bay/dock drivers | |
1124 | will get autoloaded and the device might still match | |
1125 | against another driver. | |
1126 | */ | |
c3d6de69 | 1127 | if (acpi_is_video_device(device)) |
3620f2f2 FS |
1128 | cid_add = ACPI_VIDEO_HID; |
1129 | else if (ACPI_SUCCESS(acpi_bay_match(device))) | |
1130 | cid_add = ACPI_BAY_HID; | |
1131 | else if (ACPI_SUCCESS(acpi_dock_match(device))) | |
1132 | cid_add = ACPI_DOCK_HID; | |
54735266 | 1133 | |
1da177e4 LT |
1134 | break; |
1135 | case ACPI_BUS_TYPE_POWER: | |
1136 | hid = ACPI_POWER_HID; | |
1137 | break; | |
1138 | case ACPI_BUS_TYPE_PROCESSOR: | |
ad93a765 | 1139 | hid = ACPI_PROCESSOR_OBJECT_HID; |
1da177e4 | 1140 | break; |
1da177e4 LT |
1141 | case ACPI_BUS_TYPE_THERMAL: |
1142 | hid = ACPI_THERMAL_HID; | |
1143 | break; | |
1144 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
1145 | hid = ACPI_BUTTON_HID_POWERF; | |
1146 | break; | |
1147 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
1148 | hid = ACPI_BUTTON_HID_SLEEPF; | |
1149 | break; | |
1150 | } | |
1151 | ||
0c526d96 | 1152 | /* |
1da177e4 LT |
1153 | * \_SB |
1154 | * ---- | |
1155 | * Fix for the system root bus device -- the only root-level device. | |
1156 | */ | |
66b7ed40 | 1157 | if (((acpi_handle)device->parent == ACPI_ROOT_OBJECT) && |
c7bcb4e9 | 1158 | (device->device_type == ACPI_BUS_TYPE_DEVICE)) { |
1da177e4 LT |
1159 | hid = ACPI_BUS_HID; |
1160 | strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME); | |
1161 | strcpy(device->pnp.device_class, ACPI_BUS_CLASS); | |
1162 | } | |
1163 | ||
1164 | if (hid) { | |
15b8dd53 BM |
1165 | device->pnp.hardware_id = ACPI_ALLOCATE_ZEROED(strlen (hid) + 1); |
1166 | if (device->pnp.hardware_id) { | |
1167 | strcpy(device->pnp.hardware_id, hid); | |
1168 | device->flags.hardware_id = 1; | |
1169 | } | |
1da177e4 | 1170 | } |
718fb0de HD |
1171 | if (!device->flags.hardware_id) |
1172 | device->pnp.hardware_id = ""; | |
15b8dd53 | 1173 | |
1da177e4 | 1174 | if (uid) { |
15b8dd53 BM |
1175 | device->pnp.unique_id = ACPI_ALLOCATE_ZEROED(strlen (uid) + 1); |
1176 | if (device->pnp.unique_id) { | |
1177 | strcpy(device->pnp.unique_id, uid); | |
1178 | device->flags.unique_id = 1; | |
1179 | } | |
1da177e4 | 1180 | } |
718fb0de HD |
1181 | if (!device->flags.unique_id) |
1182 | device->pnp.unique_id = ""; | |
15b8dd53 | 1183 | |
3620f2f2 | 1184 | if (cid_list || cid_add) { |
15b8dd53 BM |
1185 | struct acpica_device_id_list *list; |
1186 | ||
1187 | if (cid_add) { | |
1188 | struct acpica_device_id cid; | |
1189 | cid.length = strlen (cid_add) + 1; | |
1190 | cid.string = cid_add; | |
1191 | ||
1192 | list = acpi_add_cid(info, &cid); | |
1193 | } else { | |
1194 | list = acpi_add_cid(info, NULL); | |
3620f2f2 | 1195 | } |
3620f2f2 FS |
1196 | |
1197 | if (list) { | |
3620f2f2 | 1198 | device->pnp.cid_list = list; |
15b8dd53 BM |
1199 | if (cid_add) |
1200 | device->flags.compatible_ids = 1; | |
1201 | } | |
1da177e4 LT |
1202 | } |
1203 | ||
15b8dd53 | 1204 | kfree(info); |
1da177e4 LT |
1205 | } |
1206 | ||
bc3b0772 | 1207 | static int acpi_device_set_context(struct acpi_device *device) |
1da177e4 | 1208 | { |
bc3b0772 BH |
1209 | acpi_status status; |
1210 | ||
1da177e4 LT |
1211 | /* |
1212 | * Context | |
1213 | * ------- | |
1214 | * Attach this 'struct acpi_device' to the ACPI object. This makes | |
bc3b0772 BH |
1215 | * resolutions from handle->device very efficient. Fixed hardware |
1216 | * devices have no handles, so we skip them. | |
1da177e4 | 1217 | */ |
bc3b0772 BH |
1218 | if (!device->handle) |
1219 | return 0; | |
1da177e4 | 1220 | |
bc3b0772 BH |
1221 | status = acpi_attach_data(device->handle, |
1222 | acpi_bus_data_handler, device); | |
1223 | if (ACPI_SUCCESS(status)) | |
1224 | return 0; | |
1225 | ||
1226 | printk(KERN_ERR PREFIX "Error attaching device data\n"); | |
1227 | return -ENODEV; | |
1da177e4 LT |
1228 | } |
1229 | ||
4be44fcd | 1230 | static int acpi_bus_remove(struct acpi_device *dev, int rmdevice) |
1da177e4 | 1231 | { |
1da177e4 | 1232 | if (!dev) |
d550d98d | 1233 | return -EINVAL; |
1da177e4 | 1234 | |
96333578 | 1235 | dev->removal_type = ACPI_BUS_REMOVAL_EJECT; |
1890a97a | 1236 | device_release_driver(&dev->dev); |
1da177e4 LT |
1237 | |
1238 | if (!rmdevice) | |
d550d98d | 1239 | return 0; |
1da177e4 | 1240 | |
2786f6e3 RZ |
1241 | /* |
1242 | * unbind _ADR-Based Devices when hot removal | |
1243 | */ | |
1da177e4 LT |
1244 | if (dev->flags.bus_address) { |
1245 | if ((dev->parent) && (dev->parent->ops.unbind)) | |
1246 | dev->parent->ops.unbind(dev); | |
1247 | } | |
1da177e4 LT |
1248 | acpi_device_unregister(dev, ACPI_BUS_REMOVAL_EJECT); |
1249 | ||
d550d98d | 1250 | return 0; |
1da177e4 LT |
1251 | } |
1252 | ||
5c478f49 BH |
1253 | static int acpi_add_single_object(struct acpi_device **child, |
1254 | acpi_handle handle, int type, | |
1255 | struct acpi_bus_ops *ops) | |
1da177e4 | 1256 | { |
77c24888 BH |
1257 | int result; |
1258 | struct acpi_device *device; | |
29aaefa6 | 1259 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 1260 | |
36bcbec7 | 1261 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 1262 | if (!device) { |
6468463a | 1263 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 1264 | return -ENOMEM; |
1da177e4 | 1265 | } |
1da177e4 | 1266 | |
caaa6efb | 1267 | device->device_type = type; |
1da177e4 | 1268 | device->handle = handle; |
5c478f49 | 1269 | device->parent = acpi_bus_get_parent(handle); |
c4168bff LS |
1270 | device->bus_ops = *ops; /* workround for not call .start */ |
1271 | ||
c7bcb4e9 | 1272 | acpi_device_get_busid(device); |
1da177e4 LT |
1273 | |
1274 | /* | |
1275 | * Flags | |
1276 | * ----- | |
1277 | * Get prior to calling acpi_bus_get_status() so we know whether | |
1278 | * or not _STA is present. Note that we only look for object | |
1279 | * handles -- cannot evaluate objects until we know the device is | |
1280 | * present and properly initialized. | |
1281 | */ | |
1282 | result = acpi_bus_get_flags(device); | |
1283 | if (result) | |
1284 | goto end; | |
1285 | ||
1286 | /* | |
1287 | * Status | |
1288 | * ------ | |
6940faba KT |
1289 | * See if the device is present. We always assume that non-Device |
1290 | * and non-Processor objects (e.g. thermal zones, power resources, | |
1291 | * etc.) are present, functioning, etc. (at least when parent object | |
1292 | * is present). Note that _STA has a different meaning for some | |
1293 | * objects (e.g. power resources) so we need to be careful how we use | |
1294 | * it. | |
1da177e4 LT |
1295 | */ |
1296 | switch (type) { | |
6940faba | 1297 | case ACPI_BUS_TYPE_PROCESSOR: |
1da177e4 LT |
1298 | case ACPI_BUS_TYPE_DEVICE: |
1299 | result = acpi_bus_get_status(device); | |
3620f2f2 FS |
1300 | if (ACPI_FAILURE(result)) { |
1301 | result = -ENODEV; | |
1da177e4 LT |
1302 | goto end; |
1303 | } | |
39a0ad87 ZY |
1304 | /* |
1305 | * When the device is neither present nor functional, the | |
1306 | * device should not be added to Linux ACPI device tree. | |
1307 | * When the status of the device is not present but functinal, | |
1308 | * it should be added to Linux ACPI tree. For example : bay | |
1309 | * device , dock device. | |
1310 | * In such conditions it is unncessary to check whether it is | |
1311 | * bay device or dock device. | |
1312 | */ | |
1313 | if (!device->status.present && !device->status.functional) { | |
1314 | result = -ENODEV; | |
1315 | goto end; | |
3620f2f2 | 1316 | } |
1da177e4 LT |
1317 | break; |
1318 | default: | |
0c0e8921 BH |
1319 | STRUCT_TO_INT(device->status) = |
1320 | ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | | |
1321 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; | |
1da177e4 LT |
1322 | break; |
1323 | } | |
1324 | ||
1325 | /* | |
1326 | * Initialize Device | |
1327 | * ----------------- | |
1328 | * TBD: Synch with Core's enumeration/initialization process. | |
1329 | */ | |
1330 | ||
1331 | /* | |
1332 | * Hardware ID, Unique ID, & Bus Address | |
1333 | * ------------------------------------- | |
1334 | */ | |
c7bcb4e9 | 1335 | acpi_device_set_id(device); |
1da177e4 LT |
1336 | |
1337 | /* | |
1338 | * Power Management | |
1339 | * ---------------- | |
1340 | */ | |
1341 | if (device->flags.power_manageable) { | |
1342 | result = acpi_bus_get_power_flags(device); | |
1343 | if (result) | |
1344 | goto end; | |
1345 | } | |
1346 | ||
4be44fcd | 1347 | /* |
1da177e4 LT |
1348 | * Wakeup device management |
1349 | *----------------------- | |
1350 | */ | |
1351 | if (device->flags.wake_capable) { | |
1352 | result = acpi_bus_get_wakeup_device_flags(device); | |
1353 | if (result) | |
1354 | goto end; | |
1355 | } | |
1356 | ||
1357 | /* | |
1358 | * Performance Management | |
1359 | * ---------------------- | |
1360 | */ | |
1361 | if (device->flags.performance_manageable) { | |
1362 | result = acpi_bus_get_perf_flags(device); | |
1363 | if (result) | |
1364 | goto end; | |
1365 | } | |
1366 | ||
bc3b0772 | 1367 | if ((result = acpi_device_set_context(device))) |
f61f9258 | 1368 | goto end; |
1da177e4 | 1369 | |
66b7ed40 | 1370 | result = acpi_device_register(device); |
1da177e4 LT |
1371 | |
1372 | /* | |
2786f6e3 | 1373 | * Bind _ADR-Based Devices when hot add |
1da177e4 LT |
1374 | */ |
1375 | if (device->flags.bus_address) { | |
1376 | if (device->parent && device->parent->ops.bind) | |
1377 | device->parent->ops.bind(device); | |
1378 | } | |
1379 | ||
0c526d96 | 1380 | end: |
29aaefa6 BH |
1381 | if (!result) { |
1382 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1383 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
1384 | "Adding %s [%s] parent %s\n", dev_name(&device->dev), | |
1385 | (char *) buffer.pointer, | |
1386 | device->parent ? dev_name(&device->parent->dev) : | |
1387 | "(null)")); | |
1388 | kfree(buffer.pointer); | |
1da177e4 | 1389 | *child = device; |
29aaefa6 | 1390 | } else |
718fb0de | 1391 | acpi_device_release(&device->dev); |
1da177e4 | 1392 | |
d550d98d | 1393 | return result; |
1da177e4 | 1394 | } |
1da177e4 | 1395 | |
51a85faf BH |
1396 | static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl, |
1397 | void *context, void **return_value) | |
1da177e4 | 1398 | { |
4be44fcd | 1399 | acpi_status status = AE_OK; |
51a85faf | 1400 | struct acpi_device *device = NULL; |
4be44fcd | 1401 | acpi_object_type type = 0; |
51a85faf | 1402 | struct acpi_bus_ops *ops = context; |
1da177e4 | 1403 | |
51a85faf BH |
1404 | status = acpi_get_type(handle, &type); |
1405 | if (ACPI_FAILURE(status)) | |
1406 | return AE_OK; | |
4be44fcd | 1407 | |
1da177e4 | 1408 | /* |
51a85faf | 1409 | * We're only interested in objects that we consider 'devices'. |
1da177e4 | 1410 | */ |
51a85faf BH |
1411 | switch (type) { |
1412 | case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */ | |
1413 | case ACPI_TYPE_DEVICE: | |
1414 | type = ACPI_BUS_TYPE_DEVICE; | |
1415 | break; | |
1416 | case ACPI_TYPE_PROCESSOR: | |
1417 | type = ACPI_BUS_TYPE_PROCESSOR; | |
1418 | break; | |
1419 | case ACPI_TYPE_THERMAL: | |
1420 | type = ACPI_BUS_TYPE_THERMAL; | |
1421 | break; | |
1422 | case ACPI_TYPE_POWER: | |
1423 | type = ACPI_BUS_TYPE_POWER; | |
1424 | break; | |
1425 | default: | |
1426 | return AE_OK; | |
1427 | } | |
1da177e4 | 1428 | |
51a85faf BH |
1429 | if (ops->acpi_op_add) |
1430 | status = acpi_add_single_object(&device, handle, type, ops); | |
1431 | else | |
1432 | status = acpi_bus_get_device(handle, &device); | |
1da177e4 | 1433 | |
51a85faf BH |
1434 | if (ACPI_FAILURE(status)) |
1435 | return AE_CTRL_DEPTH; | |
1da177e4 | 1436 | |
51a85faf BH |
1437 | if (ops->acpi_op_start && !(ops->acpi_op_add)) { |
1438 | status = acpi_start_single_object(device); | |
1da177e4 | 1439 | if (ACPI_FAILURE(status)) |
51a85faf BH |
1440 | return AE_CTRL_DEPTH; |
1441 | } | |
1da177e4 | 1442 | |
51a85faf BH |
1443 | /* |
1444 | * If the device is present, enabled, and functioning then | |
1445 | * parse its scope (depth-first). Note that we need to | |
1446 | * represent absent devices to facilitate PnP notifications | |
1447 | * -- but only the subtree head (not all of its children, | |
1448 | * which will be enumerated when the parent is inserted). | |
1449 | * | |
1450 | * TBD: Need notifications and other detection mechanisms | |
1451 | * in place before we can fully implement this. | |
1452 | * | |
1453 | * When the device is not present but functional, it is also | |
1454 | * necessary to scan the children of this device. | |
1455 | */ | |
1456 | if (!device->status.present && !device->status.functional) | |
1457 | return AE_CTRL_DEPTH; | |
1da177e4 | 1458 | |
51a85faf BH |
1459 | if (!*return_value) |
1460 | *return_value = device; | |
1461 | return AE_OK; | |
1462 | } | |
3fb02738 | 1463 | |
51a85faf BH |
1464 | static int acpi_bus_scan(acpi_handle handle, struct acpi_bus_ops *ops, |
1465 | struct acpi_device **child) | |
1466 | { | |
1467 | acpi_status status; | |
1468 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
1469 | void *device = NULL; | |
3fb02738 | 1470 | |
51a85faf BH |
1471 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); |
1472 | printk(KERN_INFO PREFIX "Enumerating devices from [%s]\n", | |
1473 | (char *) buffer.pointer); | |
1da177e4 | 1474 | |
51a85faf BH |
1475 | status = acpi_bus_check_add(handle, 0, ops, &device); |
1476 | if (ACPI_SUCCESS(status)) | |
1477 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
1478 | acpi_bus_check_add, ops, &device); | |
1da177e4 | 1479 | |
51a85faf BH |
1480 | if (child) |
1481 | *child = device; | |
d550d98d | 1482 | return 0; |
1da177e4 | 1483 | } |
1da177e4 | 1484 | |
3fb02738 | 1485 | int |
4be44fcd LB |
1486 | acpi_bus_add(struct acpi_device **child, |
1487 | struct acpi_device *parent, acpi_handle handle, int type) | |
3fb02738 | 1488 | { |
3fb02738 RS |
1489 | struct acpi_bus_ops ops; |
1490 | ||
c4168bff LS |
1491 | memset(&ops, 0, sizeof(ops)); |
1492 | ops.acpi_op_add = 1; | |
3fb02738 | 1493 | |
51a85faf BH |
1494 | acpi_bus_scan(handle, &ops, child); |
1495 | return 0; | |
3fb02738 RS |
1496 | } |
1497 | EXPORT_SYMBOL(acpi_bus_add); | |
1498 | ||
4be44fcd | 1499 | int acpi_bus_start(struct acpi_device *device) |
3fb02738 | 1500 | { |
3fb02738 RS |
1501 | struct acpi_bus_ops ops; |
1502 | ||
8e029bf0 BH |
1503 | memset(&ops, 0, sizeof(ops)); |
1504 | ops.acpi_op_start = 1; | |
3fb02738 | 1505 | |
51a85faf BH |
1506 | acpi_bus_scan(device->handle, &ops, NULL); |
1507 | return 0; | |
3fb02738 RS |
1508 | } |
1509 | EXPORT_SYMBOL(acpi_bus_start); | |
1da177e4 | 1510 | |
ceaba663 | 1511 | int acpi_bus_trim(struct acpi_device *start, int rmdevice) |
1da177e4 | 1512 | { |
4be44fcd LB |
1513 | acpi_status status; |
1514 | struct acpi_device *parent, *child; | |
1515 | acpi_handle phandle, chandle; | |
1516 | acpi_object_type type; | |
1517 | u32 level = 1; | |
1518 | int err = 0; | |
1519 | ||
1520 | parent = start; | |
1da177e4 LT |
1521 | phandle = start->handle; |
1522 | child = chandle = NULL; | |
1523 | ||
1524 | while ((level > 0) && parent && (!err)) { | |
1525 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, | |
4be44fcd | 1526 | chandle, &chandle); |
1da177e4 LT |
1527 | |
1528 | /* | |
1529 | * If this scope is exhausted then move our way back up. | |
1530 | */ | |
1531 | if (ACPI_FAILURE(status)) { | |
1532 | level--; | |
1533 | chandle = phandle; | |
1534 | acpi_get_parent(phandle, &phandle); | |
1535 | child = parent; | |
1536 | parent = parent->parent; | |
1537 | ||
1538 | if (level == 0) | |
1539 | err = acpi_bus_remove(child, rmdevice); | |
1540 | else | |
1541 | err = acpi_bus_remove(child, 1); | |
1542 | ||
1543 | continue; | |
1544 | } | |
1545 | ||
1546 | status = acpi_get_type(chandle, &type); | |
1547 | if (ACPI_FAILURE(status)) { | |
1548 | continue; | |
1549 | } | |
1550 | /* | |
1551 | * If there is a device corresponding to chandle then | |
1552 | * parse it (depth-first). | |
1553 | */ | |
1554 | if (acpi_bus_get_device(chandle, &child) == 0) { | |
1555 | level++; | |
1556 | phandle = chandle; | |
1557 | chandle = NULL; | |
1558 | parent = child; | |
1559 | } | |
1560 | continue; | |
1561 | } | |
1562 | return err; | |
1563 | } | |
ceaba663 KA |
1564 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
1565 | ||
e8b945c9 | 1566 | static int acpi_bus_scan_fixed(void) |
1da177e4 | 1567 | { |
4be44fcd LB |
1568 | int result = 0; |
1569 | struct acpi_device *device = NULL; | |
c4168bff | 1570 | struct acpi_bus_ops ops; |
1da177e4 | 1571 | |
c4168bff LS |
1572 | memset(&ops, 0, sizeof(ops)); |
1573 | ops.acpi_op_add = 1; | |
1574 | ops.acpi_op_start = 1; | |
1575 | ||
1da177e4 LT |
1576 | /* |
1577 | * Enumerate all fixed-feature devices. | |
1578 | */ | |
cee324b1 | 1579 | if ((acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON) == 0) { |
5c478f49 | 1580 | result = acpi_add_single_object(&device, NULL, |
c4168bff LS |
1581 | ACPI_BUS_TYPE_POWER_BUTTON, |
1582 | &ops); | |
3fb02738 | 1583 | } |
1da177e4 | 1584 | |
cee324b1 | 1585 | if ((acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON) == 0) { |
5c478f49 | 1586 | result = acpi_add_single_object(&device, NULL, |
c4168bff LS |
1587 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
1588 | &ops); | |
3fb02738 | 1589 | } |
1da177e4 | 1590 | |
d550d98d | 1591 | return result; |
1da177e4 LT |
1592 | } |
1593 | ||
e747f274 | 1594 | int __init acpi_scan_init(void) |
1da177e4 LT |
1595 | { |
1596 | int result; | |
3fb02738 | 1597 | struct acpi_bus_ops ops; |
1da177e4 | 1598 | |
c4168bff LS |
1599 | memset(&ops, 0, sizeof(ops)); |
1600 | ops.acpi_op_add = 1; | |
1601 | ops.acpi_op_start = 1; | |
1da177e4 | 1602 | |
5b327265 PM |
1603 | result = bus_register(&acpi_bus_type); |
1604 | if (result) { | |
1605 | /* We don't want to quit even if we failed to add suspend/resume */ | |
1606 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
1607 | } | |
1608 | ||
1da177e4 LT |
1609 | /* |
1610 | * Enumerate devices in the ACPI namespace. | |
1611 | */ | |
51a85faf | 1612 | result = acpi_bus_scan(ACPI_ROOT_OBJECT, &ops, &acpi_root); |
c04209a7 | 1613 | |
c4168bff | 1614 | if (!result) |
adc08e20 | 1615 | result = acpi_bus_scan_fixed(); |
1da177e4 LT |
1616 | |
1617 | if (result) | |
1618 | acpi_device_unregister(acpi_root, ACPI_BUS_REMOVAL_NORMAL); | |
1619 | ||
d550d98d | 1620 | return result; |
1da177e4 | 1621 | } |