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> |
26d46867 | 9 | #include <asm/signal.h> |
1da177e4 LT |
10 | |
11 | #include <acpi/acpi_drivers.h> | |
12 | #include <acpi/acinterp.h> /* for acpi_ex_eisa_id_to_string() */ | |
13 | ||
1da177e4 | 14 | #define _COMPONENT ACPI_BUS_COMPONENT |
f52fd66d | 15 | ACPI_MODULE_NAME("scan"); |
1da177e4 | 16 | #define STRUCT_TO_INT(s) (*((int*)&s)) |
4be44fcd | 17 | extern struct acpi_device *acpi_root; |
1da177e4 LT |
18 | |
19 | #define ACPI_BUS_CLASS "system_bus" | |
29b71a1c | 20 | #define ACPI_BUS_HID "LNXSYBUS" |
1da177e4 LT |
21 | #define ACPI_BUS_DEVICE_NAME "System Bus" |
22 | ||
23 | static LIST_HEAD(acpi_device_list); | |
e49bd2dd | 24 | static LIST_HEAD(acpi_bus_id_list); |
1da177e4 LT |
25 | DEFINE_SPINLOCK(acpi_device_lock); |
26 | LIST_HEAD(acpi_wakeup_device_list); | |
27 | ||
e49bd2dd | 28 | struct acpi_device_bus_id{ |
bb095854 | 29 | char bus_id[15]; |
e49bd2dd ZR |
30 | unsigned int instance_no; |
31 | struct list_head node; | |
1da177e4 | 32 | }; |
29b71a1c TR |
33 | |
34 | /* | |
35 | * Creates hid/cid(s) string needed for modalias and uevent | |
36 | * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: | |
37 | * char *modalias: "acpi:IBM0001:ACPI0001" | |
38 | */ | |
b3e572d2 AB |
39 | static int create_modalias(struct acpi_device *acpi_dev, char *modalias, |
40 | int size) | |
41 | { | |
29b71a1c | 42 | int len; |
5c9fcb5d | 43 | int count; |
29b71a1c | 44 | |
5c9fcb5d | 45 | if (!acpi_dev->flags.hardware_id && !acpi_dev->flags.compatible_ids) |
29b71a1c TR |
46 | return -ENODEV; |
47 | ||
5c9fcb5d | 48 | len = snprintf(modalias, size, "acpi:"); |
29b71a1c TR |
49 | size -= len; |
50 | ||
5c9fcb5d ZR |
51 | if (acpi_dev->flags.hardware_id) { |
52 | count = snprintf(&modalias[len], size, "%s:", | |
53 | acpi_dev->pnp.hardware_id); | |
54 | if (count < 0 || count >= size) | |
55 | return -EINVAL; | |
56 | len += count; | |
57 | size -= count; | |
58 | } | |
59 | ||
29b71a1c TR |
60 | if (acpi_dev->flags.compatible_ids) { |
61 | struct acpi_compatible_id_list *cid_list; | |
62 | int i; | |
29b71a1c TR |
63 | |
64 | cid_list = acpi_dev->pnp.cid_list; | |
65 | for (i = 0; i < cid_list->count; i++) { | |
66 | count = snprintf(&modalias[len], size, "%s:", | |
67 | cid_list->id[i].value); | |
68 | if (count < 0 || count >= size) { | |
87ecd5cd | 69 | printk(KERN_ERR PREFIX "%s cid[%i] exceeds event buffer size", |
29b71a1c TR |
70 | acpi_dev->pnp.device_name, i); |
71 | break; | |
72 | } | |
73 | len += count; | |
74 | size -= count; | |
75 | } | |
76 | } | |
77 | ||
78 | modalias[len] = '\0'; | |
79 | return len; | |
80 | } | |
81 | ||
82 | static ssize_t | |
83 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
84 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
85 | int len; | |
86 | ||
87 | /* Device has no HID and no CID or string is >1024 */ | |
88 | len = create_modalias(acpi_dev, buf, 1024); | |
89 | if (len <= 0) | |
90 | return 0; | |
91 | buf[len++] = '\n'; | |
92 | return len; | |
93 | } | |
94 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); | |
95 | ||
26d46867 | 96 | static int acpi_bus_hot_remove_device(void *context) |
1da177e4 | 97 | { |
26d46867 ZR |
98 | struct acpi_device *device; |
99 | acpi_handle handle = context; | |
1da177e4 LT |
100 | struct acpi_object_list arg_list; |
101 | union acpi_object arg; | |
102 | acpi_status status = AE_OK; | |
1da177e4 | 103 | |
26d46867 ZR |
104 | if (acpi_bus_get_device(handle, &device)) |
105 | return 0; | |
106 | ||
107 | if (!device) | |
108 | return 0; | |
109 | ||
110 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
111 | "Hot-removing device %s...\n", device->dev.bus_id)); | |
112 | ||
113 | ||
114 | if (acpi_bus_trim(device, 1)) { | |
115 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
116 | "Removing device failed\n")); | |
117 | return -1; | |
118 | } | |
1da177e4 | 119 | |
26d46867 ZR |
120 | /* power off device */ |
121 | status = acpi_evaluate_object(handle, "_PS3", NULL, NULL); | |
122 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) | |
123 | ACPI_DEBUG_PRINT((ACPI_DB_WARN, | |
124 | "Power-off device failed\n")); | |
125 | ||
126 | if (device->flags.lockable) { | |
1da177e4 LT |
127 | arg_list.count = 1; |
128 | arg_list.pointer = &arg; | |
129 | arg.type = ACPI_TYPE_INTEGER; | |
130 | arg.integer.value = 0; | |
131 | acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); | |
132 | } | |
1da177e4 | 133 | |
1da177e4 LT |
134 | arg_list.count = 1; |
135 | arg_list.pointer = &arg; | |
136 | arg.type = ACPI_TYPE_INTEGER; | |
137 | arg.integer.value = 1; | |
1da177e4 | 138 | |
1da177e4 LT |
139 | /* |
140 | * TBD: _EJD support. | |
141 | */ | |
1da177e4 | 142 | status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); |
26d46867 ZR |
143 | if (ACPI_FAILURE(status)) |
144 | return -ENODEV; | |
1da177e4 | 145 | |
26d46867 | 146 | return 0; |
1da177e4 LT |
147 | } |
148 | ||
1da177e4 | 149 | static ssize_t |
f883d9db PM |
150 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
151 | const char *buf, size_t count) | |
1da177e4 | 152 | { |
4be44fcd | 153 | int ret = count; |
4be44fcd | 154 | acpi_status status; |
4be44fcd | 155 | acpi_object_type type = 0; |
f883d9db | 156 | struct acpi_device *acpi_device = to_acpi_device(d); |
1da177e4 | 157 | |
1da177e4 LT |
158 | if ((!count) || (buf[0] != '1')) { |
159 | return -EINVAL; | |
160 | } | |
1da177e4 | 161 | #ifndef FORCE_EJECT |
f883d9db | 162 | if (acpi_device->driver == NULL) { |
1da177e4 LT |
163 | ret = -ENODEV; |
164 | goto err; | |
165 | } | |
166 | #endif | |
f883d9db PM |
167 | status = acpi_get_type(acpi_device->handle, &type); |
168 | if (ACPI_FAILURE(status) || (!acpi_device->flags.ejectable)) { | |
1da177e4 LT |
169 | ret = -ENODEV; |
170 | goto err; | |
171 | } | |
1da177e4 | 172 | |
26d46867 ZR |
173 | /* remove the device in another thread to fix the deadlock issue */ |
174 | ret = kernel_thread(acpi_bus_hot_remove_device, | |
175 | acpi_device->handle, SIGCHLD); | |
4be44fcd | 176 | err: |
1da177e4 | 177 | return ret; |
1da177e4 LT |
178 | } |
179 | ||
f883d9db | 180 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
1da177e4 | 181 | |
e49bd2dd ZR |
182 | static ssize_t |
183 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
184 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1da177e4 | 185 | |
e49bd2dd | 186 | return sprintf(buf, "%s\n", acpi_dev->pnp.hardware_id); |
1da177e4 | 187 | } |
e49bd2dd | 188 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
1da177e4 | 189 | |
e49bd2dd ZR |
190 | static ssize_t |
191 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
192 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
193 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
194 | int result; | |
1da177e4 | 195 | |
e49bd2dd ZR |
196 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
197 | if(result) | |
198 | goto end; | |
1da177e4 | 199 | |
e49bd2dd ZR |
200 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
201 | kfree(path.pointer); | |
202 | end: | |
203 | return result; | |
1da177e4 | 204 | } |
e49bd2dd | 205 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
1da177e4 | 206 | |
e49bd2dd | 207 | static int acpi_device_setup_files(struct acpi_device *dev) |
1da177e4 | 208 | { |
f883d9db PM |
209 | acpi_status status; |
210 | acpi_handle temp; | |
e49bd2dd | 211 | int result = 0; |
1da177e4 LT |
212 | |
213 | /* | |
e49bd2dd | 214 | * Devices gotten from FADT don't have a "path" attribute |
1da177e4 | 215 | */ |
e49bd2dd ZR |
216 | if(dev->handle) { |
217 | result = device_create_file(&dev->dev, &dev_attr_path); | |
218 | if(result) | |
219 | goto end; | |
1da177e4 LT |
220 | } |
221 | ||
e49bd2dd ZR |
222 | if(dev->flags.hardware_id) { |
223 | result = device_create_file(&dev->dev, &dev_attr_hid); | |
224 | if(result) | |
225 | goto end; | |
226 | } | |
1da177e4 | 227 | |
29b71a1c TR |
228 | if (dev->flags.hardware_id || dev->flags.compatible_ids){ |
229 | result = device_create_file(&dev->dev, &dev_attr_modalias); | |
230 | if(result) | |
231 | goto end; | |
232 | } | |
233 | ||
e49bd2dd ZR |
234 | /* |
235 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
236 | * hot-removal function from userland. | |
237 | */ | |
f883d9db PM |
238 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); |
239 | if (ACPI_SUCCESS(status)) | |
e49bd2dd ZR |
240 | result = device_create_file(&dev->dev, &dev_attr_eject); |
241 | end: | |
242 | return result; | |
1da177e4 LT |
243 | } |
244 | ||
f883d9db | 245 | static void acpi_device_remove_files(struct acpi_device *dev) |
1da177e4 | 246 | { |
f883d9db PM |
247 | acpi_status status; |
248 | acpi_handle temp; | |
1da177e4 | 249 | |
f883d9db PM |
250 | /* |
251 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
252 | * hot-removal function from userland. | |
253 | */ | |
254 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); | |
255 | if (ACPI_SUCCESS(status)) | |
256 | device_remove_file(&dev->dev, &dev_attr_eject); | |
1da177e4 | 257 | |
29b71a1c TR |
258 | if (dev->flags.hardware_id || dev->flags.compatible_ids) |
259 | device_remove_file(&dev->dev, &dev_attr_modalias); | |
260 | ||
e49bd2dd ZR |
261 | if(dev->flags.hardware_id) |
262 | device_remove_file(&dev->dev, &dev_attr_hid); | |
263 | if(dev->handle) | |
264 | device_remove_file(&dev->dev, &dev_attr_path); | |
1da177e4 | 265 | } |
1da177e4 | 266 | /* -------------------------------------------------------------------------- |
9e89dde2 | 267 | ACPI Bus operations |
1da177e4 | 268 | -------------------------------------------------------------------------- */ |
29b71a1c TR |
269 | |
270 | int acpi_match_device_ids(struct acpi_device *device, | |
271 | const struct acpi_device_id *ids) | |
272 | { | |
273 | const struct acpi_device_id *id; | |
274 | ||
275 | if (device->flags.hardware_id) { | |
276 | for (id = ids; id->id[0]; id++) { | |
277 | if (!strcmp((char*)id->id, device->pnp.hardware_id)) | |
278 | return 0; | |
279 | } | |
280 | } | |
281 | ||
282 | if (device->flags.compatible_ids) { | |
283 | struct acpi_compatible_id_list *cid_list = device->pnp.cid_list; | |
284 | int i; | |
285 | ||
286 | for (id = ids; id->id[0]; id++) { | |
287 | /* compare multiple _CID entries against driver ids */ | |
288 | for (i = 0; i < cid_list->count; i++) { | |
289 | if (!strcmp((char*)id->id, | |
290 | cid_list->id[i].value)) | |
291 | return 0; | |
292 | } | |
293 | } | |
294 | } | |
295 | ||
296 | return -ENOENT; | |
297 | } | |
298 | EXPORT_SYMBOL(acpi_match_device_ids); | |
299 | ||
1890a97a | 300 | static void acpi_device_release(struct device *dev) |
1da177e4 | 301 | { |
1890a97a | 302 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 303 | |
1890a97a PM |
304 | kfree(acpi_dev->pnp.cid_list); |
305 | kfree(acpi_dev); | |
1da177e4 LT |
306 | } |
307 | ||
5d9464a4 | 308 | static int acpi_device_suspend(struct device *dev, pm_message_t state) |
1da177e4 | 309 | { |
5d9464a4 PM |
310 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
311 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
1da177e4 | 312 | |
5d9464a4 PM |
313 | if (acpi_drv && acpi_drv->ops.suspend) |
314 | return acpi_drv->ops.suspend(acpi_dev, state); | |
1da177e4 LT |
315 | return 0; |
316 | } | |
1da177e4 | 317 | |
5d9464a4 | 318 | static int acpi_device_resume(struct device *dev) |
9e89dde2 | 319 | { |
5d9464a4 PM |
320 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
321 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
1da177e4 | 322 | |
5d9464a4 PM |
323 | if (acpi_drv && acpi_drv->ops.resume) |
324 | return acpi_drv->ops.resume(acpi_dev); | |
d550d98d | 325 | return 0; |
1da177e4 LT |
326 | } |
327 | ||
5d9464a4 | 328 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 329 | { |
5d9464a4 PM |
330 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
331 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
1da177e4 | 332 | |
29b71a1c | 333 | return !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
5d9464a4 | 334 | } |
1da177e4 | 335 | |
7eff2e7a | 336 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 | 337 | { |
5d9464a4 | 338 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
7eff2e7a | 339 | int len; |
5d9464a4 | 340 | |
7eff2e7a KS |
341 | if (add_uevent_var(env, "MODALIAS=")) |
342 | return -ENOMEM; | |
343 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], | |
344 | sizeof(env->buf) - env->buflen); | |
345 | if (len >= (sizeof(env->buf) - env->buflen)) | |
346 | return -ENOMEM; | |
347 | env->buflen += len; | |
9e89dde2 | 348 | return 0; |
1da177e4 LT |
349 | } |
350 | ||
5d9464a4 PM |
351 | static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *); |
352 | static int acpi_start_single_object(struct acpi_device *); | |
353 | static int acpi_device_probe(struct device * dev) | |
1da177e4 | 354 | { |
5d9464a4 PM |
355 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
356 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
357 | int ret; | |
358 | ||
359 | ret = acpi_bus_driver_init(acpi_dev, acpi_drv); | |
360 | if (!ret) { | |
c4168bff LS |
361 | if (acpi_dev->bus_ops.acpi_op_start) |
362 | acpi_start_single_object(acpi_dev); | |
5d9464a4 PM |
363 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
364 | "Found driver [%s] for device [%s]\n", | |
365 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
366 | get_device(dev); | |
367 | } | |
368 | return ret; | |
369 | } | |
1da177e4 | 370 | |
5d9464a4 PM |
371 | static int acpi_device_remove(struct device * dev) |
372 | { | |
373 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
374 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
375 | ||
376 | if (acpi_drv) { | |
377 | if (acpi_drv->ops.stop) | |
96333578 | 378 | acpi_drv->ops.stop(acpi_dev, acpi_dev->removal_type); |
5d9464a4 | 379 | if (acpi_drv->ops.remove) |
96333578 | 380 | acpi_drv->ops.remove(acpi_dev, acpi_dev->removal_type); |
1da177e4 | 381 | } |
5d9464a4 PM |
382 | acpi_dev->driver = NULL; |
383 | acpi_driver_data(dev) = NULL; | |
1da177e4 | 384 | |
5d9464a4 | 385 | put_device(dev); |
9e89dde2 ZR |
386 | return 0; |
387 | } | |
1da177e4 | 388 | |
5d9464a4 | 389 | static void acpi_device_shutdown(struct device *dev) |
1da177e4 | 390 | { |
5d9464a4 PM |
391 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
392 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
1da177e4 | 393 | |
5d9464a4 PM |
394 | if (acpi_drv && acpi_drv->ops.shutdown) |
395 | acpi_drv->ops.shutdown(acpi_dev); | |
1da177e4 | 396 | |
5d9464a4 | 397 | return ; |
1da177e4 LT |
398 | } |
399 | ||
55955aad | 400 | struct bus_type acpi_bus_type = { |
9e89dde2 ZR |
401 | .name = "acpi", |
402 | .suspend = acpi_device_suspend, | |
403 | .resume = acpi_device_resume, | |
5d9464a4 PM |
404 | .shutdown = acpi_device_shutdown, |
405 | .match = acpi_bus_match, | |
406 | .probe = acpi_device_probe, | |
407 | .remove = acpi_device_remove, | |
408 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
409 | }; |
410 | ||
e49bd2dd | 411 | static int acpi_device_register(struct acpi_device *device, |
9e89dde2 | 412 | struct acpi_device *parent) |
1da177e4 | 413 | { |
4be44fcd | 414 | int result; |
e49bd2dd ZR |
415 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
416 | int found = 0; | |
9e89dde2 ZR |
417 | /* |
418 | * Linkage | |
419 | * ------- | |
420 | * Link this device to its parent and siblings. | |
421 | */ | |
422 | INIT_LIST_HEAD(&device->children); | |
423 | INIT_LIST_HEAD(&device->node); | |
424 | INIT_LIST_HEAD(&device->g_list); | |
425 | INIT_LIST_HEAD(&device->wakeup_list); | |
1da177e4 | 426 | |
e49bd2dd ZR |
427 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
428 | if (!new_bus_id) { | |
429 | printk(KERN_ERR PREFIX "Memory allocation error\n"); | |
430 | return -ENOMEM; | |
1da177e4 | 431 | } |
e49bd2dd | 432 | |
9e89dde2 | 433 | spin_lock(&acpi_device_lock); |
e49bd2dd ZR |
434 | /* |
435 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
436 | * If failed, create one and link it into acpi_bus_id_list | |
437 | */ | |
438 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
bb095854 | 439 | if(!strcmp(acpi_device_bus_id->bus_id, device->flags.hardware_id? device->pnp.hardware_id : "device")) { |
e49bd2dd ZR |
440 | acpi_device_bus_id->instance_no ++; |
441 | found = 1; | |
442 | kfree(new_bus_id); | |
443 | break; | |
444 | } | |
1da177e4 | 445 | } |
e49bd2dd ZR |
446 | if(!found) { |
447 | acpi_device_bus_id = new_bus_id; | |
bb095854 | 448 | strcpy(acpi_device_bus_id->bus_id, device->flags.hardware_id ? device->pnp.hardware_id : "device"); |
e49bd2dd ZR |
449 | acpi_device_bus_id->instance_no = 0; |
450 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 451 | } |
e49bd2dd | 452 | sprintf(device->dev.bus_id, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 453 | |
9e89dde2 ZR |
454 | if (device->parent) { |
455 | list_add_tail(&device->node, &device->parent->children); | |
456 | list_add_tail(&device->g_list, &device->parent->g_list); | |
457 | } else | |
458 | list_add_tail(&device->g_list, &acpi_device_list); | |
459 | if (device->wakeup.flags.valid) | |
460 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
461 | spin_unlock(&acpi_device_lock); | |
1da177e4 | 462 | |
1890a97a PM |
463 | if (device->parent) |
464 | device->dev.parent = &parent->dev; | |
465 | device->dev.bus = &acpi_bus_type; | |
466 | device_initialize(&device->dev); | |
1890a97a | 467 | device->dev.release = &acpi_device_release; |
e49bd2dd ZR |
468 | result = device_add(&device->dev); |
469 | if(result) { | |
87ecd5cd | 470 | printk(KERN_ERR PREFIX "Error adding device %s", device->dev.bus_id); |
e49bd2dd | 471 | goto end; |
1da177e4 | 472 | } |
1da177e4 | 473 | |
e49bd2dd ZR |
474 | result = acpi_device_setup_files(device); |
475 | if(result) | |
476 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error creating sysfs interface for device %s\n", device->dev.bus_id)); | |
1da177e4 | 477 | |
96333578 | 478 | device->removal_type = ACPI_BUS_REMOVAL_NORMAL; |
1da177e4 | 479 | return 0; |
e49bd2dd ZR |
480 | end: |
481 | spin_lock(&acpi_device_lock); | |
482 | if (device->parent) { | |
483 | list_del(&device->node); | |
484 | list_del(&device->g_list); | |
485 | } else | |
486 | list_del(&device->g_list); | |
487 | list_del(&device->wakeup_list); | |
488 | spin_unlock(&acpi_device_lock); | |
489 | return result; | |
1da177e4 LT |
490 | } |
491 | ||
9e89dde2 ZR |
492 | static void acpi_device_unregister(struct acpi_device *device, int type) |
493 | { | |
494 | spin_lock(&acpi_device_lock); | |
495 | if (device->parent) { | |
496 | list_del(&device->node); | |
497 | list_del(&device->g_list); | |
498 | } else | |
499 | list_del(&device->g_list); | |
1da177e4 | 500 | |
9e89dde2 | 501 | list_del(&device->wakeup_list); |
9e89dde2 | 502 | spin_unlock(&acpi_device_lock); |
1da177e4 | 503 | |
9e89dde2 | 504 | acpi_detach_data(device->handle, acpi_bus_data_handler); |
1890a97a | 505 | |
f883d9db | 506 | acpi_device_remove_files(device); |
1890a97a | 507 | device_unregister(&device->dev); |
1da177e4 LT |
508 | } |
509 | ||
9e89dde2 ZR |
510 | /* -------------------------------------------------------------------------- |
511 | Driver Management | |
512 | -------------------------------------------------------------------------- */ | |
1da177e4 | 513 | /** |
d758a8fa RD |
514 | * acpi_bus_driver_init - add a device to a driver |
515 | * @device: the device to add and initialize | |
516 | * @driver: driver for the device | |
517 | * | |
1da177e4 | 518 | * Used to initialize a device via its device driver. Called whenever a |
1890a97a | 519 | * driver is bound to a device. Invokes the driver's add() ops. |
1da177e4 LT |
520 | */ |
521 | static int | |
4be44fcd | 522 | acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) |
1da177e4 | 523 | { |
4be44fcd | 524 | int result = 0; |
1da177e4 | 525 | |
1da177e4 LT |
526 | |
527 | if (!device || !driver) | |
d550d98d | 528 | return -EINVAL; |
1da177e4 LT |
529 | |
530 | if (!driver->ops.add) | |
d550d98d | 531 | return -ENOSYS; |
1da177e4 LT |
532 | |
533 | result = driver->ops.add(device); | |
534 | if (result) { | |
535 | device->driver = NULL; | |
536 | acpi_driver_data(device) = NULL; | |
d550d98d | 537 | return result; |
1da177e4 LT |
538 | } |
539 | ||
540 | device->driver = driver; | |
541 | ||
542 | /* | |
543 | * TBD - Configuration Management: Assign resources to device based | |
544 | * upon possible configuration and currently allocated resources. | |
545 | */ | |
546 | ||
4be44fcd LB |
547 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
548 | "Driver successfully bound to device\n")); | |
d550d98d | 549 | return 0; |
3fb02738 RS |
550 | } |
551 | ||
8713cbef | 552 | static int acpi_start_single_object(struct acpi_device *device) |
3fb02738 RS |
553 | { |
554 | int result = 0; | |
555 | struct acpi_driver *driver; | |
556 | ||
3fb02738 RS |
557 | |
558 | if (!(driver = device->driver)) | |
d550d98d | 559 | return 0; |
3fb02738 | 560 | |
1da177e4 LT |
561 | if (driver->ops.start) { |
562 | result = driver->ops.start(device); | |
563 | if (result && driver->ops.remove) | |
564 | driver->ops.remove(device, ACPI_BUS_REMOVAL_NORMAL); | |
1da177e4 LT |
565 | } |
566 | ||
d550d98d | 567 | return result; |
1da177e4 LT |
568 | } |
569 | ||
9e89dde2 ZR |
570 | /** |
571 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
572 | * @driver: driver being registered | |
573 | * | |
574 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
575 | * devices that match the driver's criteria and binds. Returns zero for | |
576 | * success or a negative error status for failure. | |
577 | */ | |
578 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
1da177e4 | 579 | { |
1890a97a | 580 | int ret; |
1da177e4 | 581 | |
9e89dde2 ZR |
582 | if (acpi_disabled) |
583 | return -ENODEV; | |
1890a97a PM |
584 | driver->drv.name = driver->name; |
585 | driver->drv.bus = &acpi_bus_type; | |
586 | driver->drv.owner = driver->owner; | |
1da177e4 | 587 | |
1890a97a PM |
588 | ret = driver_register(&driver->drv); |
589 | return ret; | |
9e89dde2 | 590 | } |
1da177e4 | 591 | |
9e89dde2 ZR |
592 | EXPORT_SYMBOL(acpi_bus_register_driver); |
593 | ||
594 | /** | |
595 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus | |
596 | * @driver: driver to unregister | |
597 | * | |
598 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
599 | * devices that match the driver's criteria and unbinds. | |
600 | */ | |
601 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
602 | { | |
1890a97a | 603 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
604 | } |
605 | ||
606 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
607 | ||
9e89dde2 ZR |
608 | /* -------------------------------------------------------------------------- |
609 | Device Enumeration | |
610 | -------------------------------------------------------------------------- */ | |
611 | acpi_status | |
612 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
613 | { | |
614 | acpi_status status; | |
615 | acpi_handle tmp; | |
616 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
617 | union acpi_object *obj; | |
618 | ||
619 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
620 | if (ACPI_FAILURE(status)) | |
621 | return status; | |
622 | ||
623 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
624 | if (ACPI_SUCCESS(status)) { | |
625 | obj = buffer.pointer; | |
3b5fee59 HM |
626 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
627 | ejd); | |
9e89dde2 ZR |
628 | kfree(buffer.pointer); |
629 | } | |
630 | return status; | |
631 | } | |
632 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
633 | ||
634 | void acpi_bus_data_handler(acpi_handle handle, u32 function, void *context) | |
635 | { | |
636 | ||
637 | /* TBD */ | |
638 | ||
639 | return; | |
640 | } | |
641 | ||
9e89dde2 ZR |
642 | static int acpi_bus_get_perf_flags(struct acpi_device *device) |
643 | { | |
644 | device->performance.state = ACPI_STATE_UNKNOWN; | |
645 | return 0; | |
646 | } | |
647 | ||
648 | static acpi_status | |
649 | acpi_bus_extract_wakeup_device_power_package(struct acpi_device *device, | |
650 | union acpi_object *package) | |
651 | { | |
652 | int i = 0; | |
653 | union acpi_object *element = NULL; | |
654 | ||
655 | if (!device || !package || (package->package.count < 2)) | |
656 | return AE_BAD_PARAMETER; | |
657 | ||
658 | element = &(package->package.elements[0]); | |
659 | if (!element) | |
660 | return AE_BAD_PARAMETER; | |
661 | if (element->type == ACPI_TYPE_PACKAGE) { | |
662 | if ((element->package.count < 2) || | |
663 | (element->package.elements[0].type != | |
664 | ACPI_TYPE_LOCAL_REFERENCE) | |
665 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) | |
666 | return AE_BAD_DATA; | |
667 | device->wakeup.gpe_device = | |
668 | element->package.elements[0].reference.handle; | |
669 | device->wakeup.gpe_number = | |
670 | (u32) element->package.elements[1].integer.value; | |
671 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
672 | device->wakeup.gpe_number = element->integer.value; | |
673 | } else | |
674 | return AE_BAD_DATA; | |
675 | ||
676 | element = &(package->package.elements[1]); | |
677 | if (element->type != ACPI_TYPE_INTEGER) { | |
678 | return AE_BAD_DATA; | |
679 | } | |
680 | device->wakeup.sleep_state = element->integer.value; | |
681 | ||
682 | if ((package->package.count - 2) > ACPI_MAX_HANDLES) { | |
683 | return AE_NO_MEMORY; | |
684 | } | |
685 | device->wakeup.resources.count = package->package.count - 2; | |
686 | for (i = 0; i < device->wakeup.resources.count; i++) { | |
687 | element = &(package->package.elements[i + 2]); | |
cd0b2248 | 688 | if (element->type != ACPI_TYPE_LOCAL_REFERENCE) |
9e89dde2 | 689 | return AE_BAD_DATA; |
9e89dde2 ZR |
690 | |
691 | device->wakeup.resources.handles[i] = element->reference.handle; | |
1da177e4 | 692 | } |
9e89dde2 ZR |
693 | |
694 | return AE_OK; | |
1da177e4 LT |
695 | } |
696 | ||
9e89dde2 | 697 | static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
1da177e4 | 698 | { |
9e89dde2 ZR |
699 | acpi_status status = 0; |
700 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
701 | union acpi_object *package = NULL; | |
729b2bdb ZY |
702 | union acpi_object in_arg[3]; |
703 | struct acpi_object_list arg_list = { 3, in_arg }; | |
704 | acpi_status psw_status = AE_OK; | |
1da177e4 | 705 | |
29b71a1c TR |
706 | struct acpi_device_id button_device_ids[] = { |
707 | {"PNP0C0D", 0}, | |
708 | {"PNP0C0C", 0}, | |
709 | {"PNP0C0E", 0}, | |
710 | {"", 0}, | |
711 | }; | |
712 | ||
9e89dde2 ZR |
713 | /* _PRW */ |
714 | status = acpi_evaluate_object(device->handle, "_PRW", NULL, &buffer); | |
715 | if (ACPI_FAILURE(status)) { | |
716 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
717 | goto end; | |
1da177e4 | 718 | } |
1da177e4 | 719 | |
9e89dde2 ZR |
720 | package = (union acpi_object *)buffer.pointer; |
721 | status = acpi_bus_extract_wakeup_device_power_package(device, package); | |
722 | if (ACPI_FAILURE(status)) { | |
723 | ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package")); | |
724 | goto end; | |
725 | } | |
1da177e4 | 726 | |
9e89dde2 | 727 | kfree(buffer.pointer); |
1da177e4 | 728 | |
9e89dde2 | 729 | device->wakeup.flags.valid = 1; |
729b2bdb ZY |
730 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
731 | * system for the ACPI device with the _PRW object. | |
732 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. | |
733 | * So it is necessary to call _DSW object first. Only when it is not | |
734 | * present will the _PSW object used. | |
735 | */ | |
736 | /* | |
737 | * Three agruments are needed for the _DSW object. | |
738 | * Argument 0: enable/disable the wake capabilities | |
739 | * When _DSW object is called to disable the wake capabilities, maybe | |
740 | * the first argument is filled. The value of the other two agruments | |
741 | * is meaningless. | |
742 | */ | |
743 | in_arg[0].type = ACPI_TYPE_INTEGER; | |
744 | in_arg[0].integer.value = 0; | |
745 | in_arg[1].type = ACPI_TYPE_INTEGER; | |
746 | in_arg[1].integer.value = 0; | |
747 | in_arg[2].type = ACPI_TYPE_INTEGER; | |
748 | in_arg[2].integer.value = 0; | |
749 | psw_status = acpi_evaluate_object(device->handle, "_DSW", | |
750 | &arg_list, NULL); | |
751 | if (ACPI_FAILURE(psw_status) && (psw_status != AE_NOT_FOUND)) | |
752 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "error in evaluate _DSW\n")); | |
753 | /* | |
754 | * When the _DSW object is not present, OSPM will call _PSW object. | |
755 | */ | |
756 | if (psw_status == AE_NOT_FOUND) { | |
757 | /* | |
758 | * Only one agruments is required for the _PSW object. | |
759 | * agrument 0: enable/disable the wake capabilities | |
760 | */ | |
761 | arg_list.count = 1; | |
762 | in_arg[0].integer.value = 0; | |
763 | psw_status = acpi_evaluate_object(device->handle, "_PSW", | |
764 | &arg_list, NULL); | |
765 | if (ACPI_FAILURE(psw_status) && (psw_status != AE_NOT_FOUND)) | |
766 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "error in " | |
767 | "evaluate _PSW\n")); | |
768 | } | |
9e89dde2 | 769 | /* Power button, Lid switch always enable wakeup */ |
29b71a1c | 770 | if (!acpi_match_device_ids(device, button_device_ids)) |
9e89dde2 | 771 | device->wakeup.flags.run_wake = 1; |
1da177e4 | 772 | |
9e89dde2 ZR |
773 | end: |
774 | if (ACPI_FAILURE(status)) | |
775 | device->flags.wake_capable = 0; | |
d550d98d | 776 | return 0; |
1da177e4 | 777 | } |
1da177e4 | 778 | |
9e89dde2 | 779 | static int acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 780 | { |
9e89dde2 ZR |
781 | acpi_status status = 0; |
782 | acpi_handle handle = NULL; | |
783 | u32 i = 0; | |
1a365616 | 784 | |
4be44fcd | 785 | |
9e89dde2 ZR |
786 | /* |
787 | * Power Management Flags | |
788 | */ | |
789 | status = acpi_get_handle(device->handle, "_PSC", &handle); | |
790 | if (ACPI_SUCCESS(status)) | |
791 | device->power.flags.explicit_get = 1; | |
792 | status = acpi_get_handle(device->handle, "_IRC", &handle); | |
793 | if (ACPI_SUCCESS(status)) | |
794 | device->power.flags.inrush_current = 1; | |
1da177e4 | 795 | |
9e89dde2 ZR |
796 | /* |
797 | * Enumerate supported power management states | |
798 | */ | |
799 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3; i++) { | |
800 | struct acpi_device_power_state *ps = &device->power.states[i]; | |
801 | char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' }; | |
1da177e4 | 802 | |
9e89dde2 ZR |
803 | /* Evaluate "_PRx" to se if power resources are referenced */ |
804 | acpi_evaluate_reference(device->handle, object_name, NULL, | |
805 | &ps->resources); | |
806 | if (ps->resources.count) { | |
807 | device->power.flags.power_resources = 1; | |
808 | ps->flags.valid = 1; | |
1da177e4 | 809 | } |
1da177e4 | 810 | |
9e89dde2 ZR |
811 | /* Evaluate "_PSx" to see if we can do explicit sets */ |
812 | object_name[2] = 'S'; | |
813 | status = acpi_get_handle(device->handle, object_name, &handle); | |
814 | if (ACPI_SUCCESS(status)) { | |
815 | ps->flags.explicit_set = 1; | |
816 | ps->flags.valid = 1; | |
1da177e4 | 817 | } |
1da177e4 | 818 | |
9e89dde2 ZR |
819 | /* State is valid if we have some power control */ |
820 | if (ps->resources.count || ps->flags.explicit_set) | |
821 | ps->flags.valid = 1; | |
1da177e4 | 822 | |
9e89dde2 ZR |
823 | ps->power = -1; /* Unknown - driver assigned */ |
824 | ps->latency = -1; /* Unknown - driver assigned */ | |
825 | } | |
1da177e4 | 826 | |
9e89dde2 ZR |
827 | /* Set defaults for D0 and D3 states (always valid) */ |
828 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
829 | device->power.states[ACPI_STATE_D0].power = 100; | |
830 | device->power.states[ACPI_STATE_D3].flags.valid = 1; | |
831 | device->power.states[ACPI_STATE_D3].power = 0; | |
c8f7a62c | 832 | |
9e89dde2 | 833 | /* TBD: System wake support and resource requirements. */ |
c8f7a62c | 834 | |
9e89dde2 | 835 | device->power.state = ACPI_STATE_UNKNOWN; |
c8f7a62c | 836 | |
9e89dde2 ZR |
837 | return 0; |
838 | } | |
c8f7a62c | 839 | |
4be44fcd | 840 | static int acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 841 | { |
4be44fcd LB |
842 | acpi_status status = AE_OK; |
843 | acpi_handle temp = NULL; | |
1da177e4 | 844 | |
1da177e4 LT |
845 | |
846 | /* Presence of _STA indicates 'dynamic_status' */ | |
847 | status = acpi_get_handle(device->handle, "_STA", &temp); | |
848 | if (ACPI_SUCCESS(status)) | |
849 | device->flags.dynamic_status = 1; | |
850 | ||
851 | /* Presence of _CID indicates 'compatible_ids' */ | |
852 | status = acpi_get_handle(device->handle, "_CID", &temp); | |
853 | if (ACPI_SUCCESS(status)) | |
854 | device->flags.compatible_ids = 1; | |
855 | ||
856 | /* Presence of _RMV indicates 'removable' */ | |
857 | status = acpi_get_handle(device->handle, "_RMV", &temp); | |
858 | if (ACPI_SUCCESS(status)) | |
859 | device->flags.removable = 1; | |
860 | ||
861 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
862 | status = acpi_get_handle(device->handle, "_EJD", &temp); | |
863 | if (ACPI_SUCCESS(status)) | |
864 | device->flags.ejectable = 1; | |
865 | else { | |
866 | status = acpi_get_handle(device->handle, "_EJ0", &temp); | |
867 | if (ACPI_SUCCESS(status)) | |
868 | device->flags.ejectable = 1; | |
869 | } | |
870 | ||
871 | /* Presence of _LCK indicates 'lockable' */ | |
872 | status = acpi_get_handle(device->handle, "_LCK", &temp); | |
873 | if (ACPI_SUCCESS(status)) | |
874 | device->flags.lockable = 1; | |
875 | ||
876 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ | |
877 | status = acpi_get_handle(device->handle, "_PS0", &temp); | |
878 | if (ACPI_FAILURE(status)) | |
879 | status = acpi_get_handle(device->handle, "_PR0", &temp); | |
880 | if (ACPI_SUCCESS(status)) | |
881 | device->flags.power_manageable = 1; | |
882 | ||
883 | /* Presence of _PRW indicates wake capable */ | |
884 | status = acpi_get_handle(device->handle, "_PRW", &temp); | |
885 | if (ACPI_SUCCESS(status)) | |
886 | device->flags.wake_capable = 1; | |
887 | ||
3c5f9be4 | 888 | /* TBD: Performance management */ |
1da177e4 | 889 | |
d550d98d | 890 | return 0; |
1da177e4 LT |
891 | } |
892 | ||
4be44fcd LB |
893 | static void acpi_device_get_busid(struct acpi_device *device, |
894 | acpi_handle handle, int type) | |
1da177e4 | 895 | { |
4be44fcd LB |
896 | char bus_id[5] = { '?', 0 }; |
897 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
898 | int i = 0; | |
1da177e4 LT |
899 | |
900 | /* | |
901 | * Bus ID | |
902 | * ------ | |
903 | * The device's Bus ID is simply the object name. | |
904 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
905 | */ | |
906 | switch (type) { | |
907 | case ACPI_BUS_TYPE_SYSTEM: | |
908 | strcpy(device->pnp.bus_id, "ACPI"); | |
909 | break; | |
910 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
911 | strcpy(device->pnp.bus_id, "PWRF"); | |
912 | break; | |
913 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
914 | strcpy(device->pnp.bus_id, "SLPF"); | |
915 | break; | |
916 | default: | |
917 | acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer); | |
918 | /* Clean up trailing underscores (if any) */ | |
919 | for (i = 3; i > 1; i--) { | |
920 | if (bus_id[i] == '_') | |
921 | bus_id[i] = '\0'; | |
922 | else | |
923 | break; | |
924 | } | |
925 | strcpy(device->pnp.bus_id, bus_id); | |
926 | break; | |
927 | } | |
928 | } | |
929 | ||
ae843332 ZR |
930 | static int |
931 | acpi_video_bus_match(struct acpi_device *device) | |
932 | { | |
66fb9d12 | 933 | acpi_handle h_dummy; |
ae843332 ZR |
934 | |
935 | if (!device) | |
936 | return -EINVAL; | |
937 | ||
938 | /* Since there is no HID, CID for ACPI Video drivers, we have | |
939 | * to check well known required nodes for each feature we support. | |
940 | */ | |
941 | ||
942 | /* Does this device able to support video switching ? */ | |
66fb9d12 TR |
943 | if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOD", &h_dummy)) && |
944 | ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOS", &h_dummy))) | |
ae843332 ZR |
945 | return 0; |
946 | ||
947 | /* Does this device able to retrieve a video ROM ? */ | |
66fb9d12 | 948 | if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_ROM", &h_dummy))) |
ae843332 ZR |
949 | return 0; |
950 | ||
951 | /* Does this device able to configure which video head to be POSTed ? */ | |
66fb9d12 TR |
952 | if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_VPO", &h_dummy)) && |
953 | ACPI_SUCCESS(acpi_get_handle(device->handle, "_GPD", &h_dummy)) && | |
954 | ACPI_SUCCESS(acpi_get_handle(device->handle, "_SPD", &h_dummy))) | |
ae843332 ZR |
955 | return 0; |
956 | ||
957 | return -ENODEV; | |
958 | } | |
959 | ||
54735266 ZR |
960 | /* |
961 | * acpi_bay_match - see if a device is an ejectable driver bay | |
962 | * | |
963 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
964 | * then we can safely call it an ejectable drive bay | |
965 | */ | |
966 | static int acpi_bay_match(struct acpi_device *device){ | |
967 | acpi_status status; | |
968 | acpi_handle handle; | |
969 | acpi_handle tmp; | |
970 | acpi_handle phandle; | |
971 | ||
972 | handle = device->handle; | |
973 | ||
974 | status = acpi_get_handle(handle, "_EJ0", &tmp); | |
975 | if (ACPI_FAILURE(status)) | |
976 | return -ENODEV; | |
977 | ||
978 | if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || | |
979 | (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || | |
980 | (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || | |
981 | (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) | |
982 | return 0; | |
983 | ||
984 | if (acpi_get_parent(handle, &phandle)) | |
985 | return -ENODEV; | |
986 | ||
987 | if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) || | |
988 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) || | |
989 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) || | |
990 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp)))) | |
991 | return 0; | |
992 | ||
993 | return -ENODEV; | |
994 | } | |
995 | ||
3620f2f2 FS |
996 | /* |
997 | * acpi_dock_match - see if a device has a _DCK method | |
998 | */ | |
999 | static int acpi_dock_match(struct acpi_device *device) | |
1000 | { | |
1001 | acpi_handle tmp; | |
1002 | return acpi_get_handle(device->handle, "_DCK", &tmp); | |
1003 | } | |
1004 | ||
4be44fcd LB |
1005 | static void acpi_device_set_id(struct acpi_device *device, |
1006 | struct acpi_device *parent, acpi_handle handle, | |
1007 | int type) | |
1da177e4 | 1008 | { |
4be44fcd LB |
1009 | struct acpi_device_info *info; |
1010 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
1011 | char *hid = NULL; | |
1012 | char *uid = NULL; | |
1da177e4 | 1013 | struct acpi_compatible_id_list *cid_list = NULL; |
3620f2f2 | 1014 | const char *cid_add = NULL; |
4be44fcd | 1015 | acpi_status status; |
1da177e4 LT |
1016 | |
1017 | switch (type) { | |
1018 | case ACPI_BUS_TYPE_DEVICE: | |
1019 | status = acpi_get_object_info(handle, &buffer); | |
1020 | if (ACPI_FAILURE(status)) { | |
96b2dd1f | 1021 | printk(KERN_ERR PREFIX "%s: Error reading device info\n", __func__); |
1da177e4 LT |
1022 | return; |
1023 | } | |
1024 | ||
1025 | info = buffer.pointer; | |
1026 | if (info->valid & ACPI_VALID_HID) | |
1027 | hid = info->hardware_id.value; | |
1028 | if (info->valid & ACPI_VALID_UID) | |
1029 | uid = info->unique_id.value; | |
1030 | if (info->valid & ACPI_VALID_CID) | |
1031 | cid_list = &info->compatibility_id; | |
1032 | if (info->valid & ACPI_VALID_ADR) { | |
1033 | device->pnp.bus_address = info->address; | |
1034 | device->flags.bus_address = 1; | |
1035 | } | |
ae843332 | 1036 | |
3620f2f2 FS |
1037 | /* If we have a video/bay/dock device, add our selfdefined |
1038 | HID to the CID list. Like that the video/bay/dock drivers | |
1039 | will get autoloaded and the device might still match | |
1040 | against another driver. | |
1041 | */ | |
1042 | if (ACPI_SUCCESS(acpi_video_bus_match(device))) | |
1043 | cid_add = ACPI_VIDEO_HID; | |
1044 | else if (ACPI_SUCCESS(acpi_bay_match(device))) | |
1045 | cid_add = ACPI_BAY_HID; | |
1046 | else if (ACPI_SUCCESS(acpi_dock_match(device))) | |
1047 | cid_add = ACPI_DOCK_HID; | |
54735266 | 1048 | |
1da177e4 LT |
1049 | break; |
1050 | case ACPI_BUS_TYPE_POWER: | |
1051 | hid = ACPI_POWER_HID; | |
1052 | break; | |
1053 | case ACPI_BUS_TYPE_PROCESSOR: | |
1054 | hid = ACPI_PROCESSOR_HID; | |
1055 | break; | |
1056 | case ACPI_BUS_TYPE_SYSTEM: | |
1057 | hid = ACPI_SYSTEM_HID; | |
1058 | break; | |
1059 | case ACPI_BUS_TYPE_THERMAL: | |
1060 | hid = ACPI_THERMAL_HID; | |
1061 | break; | |
1062 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
1063 | hid = ACPI_BUTTON_HID_POWERF; | |
1064 | break; | |
1065 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
1066 | hid = ACPI_BUTTON_HID_SLEEPF; | |
1067 | break; | |
1068 | } | |
1069 | ||
1070 | /* | |
1071 | * \_SB | |
1072 | * ---- | |
1073 | * Fix for the system root bus device -- the only root-level device. | |
1074 | */ | |
c51a4de8 | 1075 | if (((acpi_handle)parent == ACPI_ROOT_OBJECT) && (type == ACPI_BUS_TYPE_DEVICE)) { |
1da177e4 LT |
1076 | hid = ACPI_BUS_HID; |
1077 | strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME); | |
1078 | strcpy(device->pnp.device_class, ACPI_BUS_CLASS); | |
1079 | } | |
1080 | ||
1081 | if (hid) { | |
1082 | strcpy(device->pnp.hardware_id, hid); | |
1083 | device->flags.hardware_id = 1; | |
1084 | } | |
1085 | if (uid) { | |
1086 | strcpy(device->pnp.unique_id, uid); | |
1087 | device->flags.unique_id = 1; | |
1088 | } | |
3620f2f2 FS |
1089 | if (cid_list || cid_add) { |
1090 | struct acpi_compatible_id_list *list; | |
1091 | int size = 0; | |
1092 | int count = 0; | |
1093 | ||
1094 | if (cid_list) { | |
1095 | size = cid_list->size; | |
1096 | } else if (cid_add) { | |
1097 | size = sizeof(struct acpi_compatible_id_list); | |
1098 | cid_list = ACPI_ALLOCATE_ZEROED((acpi_size) size); | |
1099 | if (!cid_list) { | |
1100 | printk(KERN_ERR "Memory allocation error\n"); | |
1101 | kfree(buffer.pointer); | |
1102 | return; | |
1103 | } else { | |
1104 | cid_list->count = 0; | |
1105 | cid_list->size = size; | |
1106 | } | |
1107 | } | |
1108 | if (cid_add) | |
1109 | size += sizeof(struct acpi_compatible_id); | |
1110 | list = kmalloc(size, GFP_KERNEL); | |
1111 | ||
1112 | if (list) { | |
1113 | if (cid_list) { | |
1114 | memcpy(list, cid_list, cid_list->size); | |
1115 | count = cid_list->count; | |
1116 | } | |
1117 | if (cid_add) { | |
1118 | strncpy(list->id[count].value, cid_add, | |
1119 | ACPI_MAX_CID_LENGTH); | |
1120 | count++; | |
1121 | device->flags.compatible_ids = 1; | |
1122 | } | |
1123 | list->size = size; | |
1124 | list->count = count; | |
1125 | device->pnp.cid_list = list; | |
1126 | } else | |
87ecd5cd | 1127 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
1da177e4 LT |
1128 | } |
1129 | ||
02438d87 | 1130 | kfree(buffer.pointer); |
1da177e4 LT |
1131 | } |
1132 | ||
4be44fcd | 1133 | static int acpi_device_set_context(struct acpi_device *device, int type) |
1da177e4 LT |
1134 | { |
1135 | acpi_status status = AE_OK; | |
1136 | int result = 0; | |
1137 | /* | |
1138 | * Context | |
1139 | * ------- | |
1140 | * Attach this 'struct acpi_device' to the ACPI object. This makes | |
1141 | * resolutions from handle->device very efficient. Note that we need | |
1142 | * to be careful with fixed-feature devices as they all attach to the | |
1143 | * root object. | |
1144 | */ | |
4be44fcd | 1145 | if (type != ACPI_BUS_TYPE_POWER_BUTTON && |
1da177e4 LT |
1146 | type != ACPI_BUS_TYPE_SLEEP_BUTTON) { |
1147 | status = acpi_attach_data(device->handle, | |
4be44fcd | 1148 | acpi_bus_data_handler, device); |
1da177e4 LT |
1149 | |
1150 | if (ACPI_FAILURE(status)) { | |
87ecd5cd | 1151 | printk(KERN_ERR PREFIX "Error attaching device data\n"); |
1da177e4 LT |
1152 | result = -ENODEV; |
1153 | } | |
1154 | } | |
1155 | return result; | |
1156 | } | |
1157 | ||
4be44fcd | 1158 | static int acpi_bus_remove(struct acpi_device *dev, int rmdevice) |
1da177e4 | 1159 | { |
1da177e4 | 1160 | if (!dev) |
d550d98d | 1161 | return -EINVAL; |
1da177e4 | 1162 | |
96333578 | 1163 | dev->removal_type = ACPI_BUS_REMOVAL_EJECT; |
1890a97a | 1164 | device_release_driver(&dev->dev); |
1da177e4 LT |
1165 | |
1166 | if (!rmdevice) | |
d550d98d | 1167 | return 0; |
1da177e4 | 1168 | |
2786f6e3 RZ |
1169 | /* |
1170 | * unbind _ADR-Based Devices when hot removal | |
1171 | */ | |
1da177e4 LT |
1172 | if (dev->flags.bus_address) { |
1173 | if ((dev->parent) && (dev->parent->ops.unbind)) | |
1174 | dev->parent->ops.unbind(dev); | |
1175 | } | |
1da177e4 LT |
1176 | acpi_device_unregister(dev, ACPI_BUS_REMOVAL_EJECT); |
1177 | ||
d550d98d | 1178 | return 0; |
1da177e4 LT |
1179 | } |
1180 | ||
3620f2f2 FS |
1181 | static int |
1182 | acpi_is_child_device(struct acpi_device *device, | |
1183 | int (*matcher)(struct acpi_device *)) | |
1184 | { | |
1185 | int result = -ENODEV; | |
1186 | ||
1187 | do { | |
1188 | if (ACPI_SUCCESS(matcher(device))) | |
1189 | return AE_OK; | |
1190 | } while ((device = device->parent)); | |
1191 | ||
1192 | return result; | |
1193 | } | |
1194 | ||
3fb02738 | 1195 | static int |
4be44fcd | 1196 | acpi_add_single_object(struct acpi_device **child, |
c4168bff LS |
1197 | struct acpi_device *parent, acpi_handle handle, int type, |
1198 | struct acpi_bus_ops *ops) | |
1da177e4 | 1199 | { |
4be44fcd LB |
1200 | int result = 0; |
1201 | struct acpi_device *device = NULL; | |
1da177e4 | 1202 | |
1da177e4 LT |
1203 | |
1204 | if (!child) | |
d550d98d | 1205 | return -EINVAL; |
1da177e4 | 1206 | |
36bcbec7 | 1207 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 1208 | if (!device) { |
6468463a | 1209 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 1210 | return -ENOMEM; |
1da177e4 | 1211 | } |
1da177e4 LT |
1212 | |
1213 | device->handle = handle; | |
1214 | device->parent = parent; | |
c4168bff LS |
1215 | device->bus_ops = *ops; /* workround for not call .start */ |
1216 | ||
1da177e4 | 1217 | |
4be44fcd | 1218 | acpi_device_get_busid(device, handle, type); |
1da177e4 LT |
1219 | |
1220 | /* | |
1221 | * Flags | |
1222 | * ----- | |
1223 | * Get prior to calling acpi_bus_get_status() so we know whether | |
1224 | * or not _STA is present. Note that we only look for object | |
1225 | * handles -- cannot evaluate objects until we know the device is | |
1226 | * present and properly initialized. | |
1227 | */ | |
1228 | result = acpi_bus_get_flags(device); | |
1229 | if (result) | |
1230 | goto end; | |
1231 | ||
1232 | /* | |
1233 | * Status | |
1234 | * ------ | |
6940faba KT |
1235 | * See if the device is present. We always assume that non-Device |
1236 | * and non-Processor objects (e.g. thermal zones, power resources, | |
1237 | * etc.) are present, functioning, etc. (at least when parent object | |
1238 | * is present). Note that _STA has a different meaning for some | |
1239 | * objects (e.g. power resources) so we need to be careful how we use | |
1240 | * it. | |
1da177e4 LT |
1241 | */ |
1242 | switch (type) { | |
6940faba | 1243 | case ACPI_BUS_TYPE_PROCESSOR: |
1da177e4 LT |
1244 | case ACPI_BUS_TYPE_DEVICE: |
1245 | result = acpi_bus_get_status(device); | |
3620f2f2 FS |
1246 | if (ACPI_FAILURE(result)) { |
1247 | result = -ENODEV; | |
1da177e4 LT |
1248 | goto end; |
1249 | } | |
3620f2f2 FS |
1250 | if (!device->status.present) { |
1251 | /* Bay and dock should be handled even if absent */ | |
1252 | if (!ACPI_SUCCESS( | |
1253 | acpi_is_child_device(device, acpi_bay_match)) && | |
1254 | !ACPI_SUCCESS( | |
1255 | acpi_is_child_device(device, acpi_dock_match))) { | |
1256 | result = -ENODEV; | |
1257 | goto end; | |
1258 | } | |
1259 | } | |
1da177e4 LT |
1260 | break; |
1261 | default: | |
0c0e8921 BH |
1262 | STRUCT_TO_INT(device->status) = |
1263 | ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | | |
1264 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; | |
1da177e4 LT |
1265 | break; |
1266 | } | |
1267 | ||
1268 | /* | |
1269 | * Initialize Device | |
1270 | * ----------------- | |
1271 | * TBD: Synch with Core's enumeration/initialization process. | |
1272 | */ | |
1273 | ||
1274 | /* | |
1275 | * Hardware ID, Unique ID, & Bus Address | |
1276 | * ------------------------------------- | |
1277 | */ | |
4be44fcd | 1278 | acpi_device_set_id(device, parent, handle, type); |
1da177e4 LT |
1279 | |
1280 | /* | |
1281 | * Power Management | |
1282 | * ---------------- | |
1283 | */ | |
1284 | if (device->flags.power_manageable) { | |
1285 | result = acpi_bus_get_power_flags(device); | |
1286 | if (result) | |
1287 | goto end; | |
1288 | } | |
1289 | ||
4be44fcd | 1290 | /* |
1da177e4 LT |
1291 | * Wakeup device management |
1292 | *----------------------- | |
1293 | */ | |
1294 | if (device->flags.wake_capable) { | |
1295 | result = acpi_bus_get_wakeup_device_flags(device); | |
1296 | if (result) | |
1297 | goto end; | |
1298 | } | |
1299 | ||
1300 | /* | |
1301 | * Performance Management | |
1302 | * ---------------------- | |
1303 | */ | |
1304 | if (device->flags.performance_manageable) { | |
1305 | result = acpi_bus_get_perf_flags(device); | |
1306 | if (result) | |
1307 | goto end; | |
1308 | } | |
1309 | ||
4be44fcd | 1310 | if ((result = acpi_device_set_context(device, type))) |
1da177e4 LT |
1311 | goto end; |
1312 | ||
e49bd2dd | 1313 | result = acpi_device_register(device, parent); |
1da177e4 LT |
1314 | |
1315 | /* | |
2786f6e3 | 1316 | * Bind _ADR-Based Devices when hot add |
1da177e4 LT |
1317 | */ |
1318 | if (device->flags.bus_address) { | |
1319 | if (device->parent && device->parent->ops.bind) | |
1320 | device->parent->ops.bind(device); | |
1321 | } | |
1322 | ||
4be44fcd | 1323 | end: |
1da177e4 LT |
1324 | if (!result) |
1325 | *child = device; | |
1326 | else { | |
6044ec88 | 1327 | kfree(device->pnp.cid_list); |
1da177e4 LT |
1328 | kfree(device); |
1329 | } | |
1330 | ||
d550d98d | 1331 | return result; |
1da177e4 | 1332 | } |
1da177e4 | 1333 | |
4be44fcd | 1334 | static int acpi_bus_scan(struct acpi_device *start, struct acpi_bus_ops *ops) |
1da177e4 | 1335 | { |
4be44fcd LB |
1336 | acpi_status status = AE_OK; |
1337 | struct acpi_device *parent = NULL; | |
1338 | struct acpi_device *child = NULL; | |
1339 | acpi_handle phandle = NULL; | |
1340 | acpi_handle chandle = NULL; | |
1341 | acpi_object_type type = 0; | |
1342 | u32 level = 1; | |
1da177e4 | 1343 | |
1da177e4 LT |
1344 | |
1345 | if (!start) | |
d550d98d | 1346 | return -EINVAL; |
1da177e4 LT |
1347 | |
1348 | parent = start; | |
1349 | phandle = start->handle; | |
4be44fcd | 1350 | |
1da177e4 LT |
1351 | /* |
1352 | * Parse through the ACPI namespace, identify all 'devices', and | |
1353 | * create a new 'struct acpi_device' for each. | |
1354 | */ | |
1355 | while ((level > 0) && parent) { | |
1356 | ||
1357 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, | |
4be44fcd | 1358 | chandle, &chandle); |
1da177e4 LT |
1359 | |
1360 | /* | |
1361 | * If this scope is exhausted then move our way back up. | |
1362 | */ | |
1363 | if (ACPI_FAILURE(status)) { | |
1364 | level--; | |
1365 | chandle = phandle; | |
1366 | acpi_get_parent(phandle, &phandle); | |
1367 | if (parent->parent) | |
1368 | parent = parent->parent; | |
1369 | continue; | |
1370 | } | |
1371 | ||
1372 | status = acpi_get_type(chandle, &type); | |
1373 | if (ACPI_FAILURE(status)) | |
1374 | continue; | |
1375 | ||
1376 | /* | |
1377 | * If this is a scope object then parse it (depth-first). | |
1378 | */ | |
1379 | if (type == ACPI_TYPE_LOCAL_SCOPE) { | |
1380 | level++; | |
1381 | phandle = chandle; | |
1382 | chandle = NULL; | |
1383 | continue; | |
1384 | } | |
1385 | ||
1386 | /* | |
1387 | * We're only interested in objects that we consider 'devices'. | |
1388 | */ | |
1389 | switch (type) { | |
1390 | case ACPI_TYPE_DEVICE: | |
1391 | type = ACPI_BUS_TYPE_DEVICE; | |
1392 | break; | |
1393 | case ACPI_TYPE_PROCESSOR: | |
1394 | type = ACPI_BUS_TYPE_PROCESSOR; | |
1395 | break; | |
1396 | case ACPI_TYPE_THERMAL: | |
1397 | type = ACPI_BUS_TYPE_THERMAL; | |
1398 | break; | |
1399 | case ACPI_TYPE_POWER: | |
1400 | type = ACPI_BUS_TYPE_POWER; | |
1401 | break; | |
1402 | default: | |
1403 | continue; | |
1404 | } | |
1405 | ||
3fb02738 RS |
1406 | if (ops->acpi_op_add) |
1407 | status = acpi_add_single_object(&child, parent, | |
c4168bff | 1408 | chandle, type, ops); |
4be44fcd | 1409 | else |
3fb02738 RS |
1410 | status = acpi_bus_get_device(chandle, &child); |
1411 | ||
4be44fcd LB |
1412 | if (ACPI_FAILURE(status)) |
1413 | continue; | |
3fb02738 | 1414 | |
c4168bff | 1415 | if (ops->acpi_op_start && !(ops->acpi_op_add)) { |
3fb02738 RS |
1416 | status = acpi_start_single_object(child); |
1417 | if (ACPI_FAILURE(status)) | |
1418 | continue; | |
1419 | } | |
1da177e4 LT |
1420 | |
1421 | /* | |
1422 | * If the device is present, enabled, and functioning then | |
1423 | * parse its scope (depth-first). Note that we need to | |
1424 | * represent absent devices to facilitate PnP notifications | |
1425 | * -- but only the subtree head (not all of its children, | |
1426 | * which will be enumerated when the parent is inserted). | |
1427 | * | |
1428 | * TBD: Need notifications and other detection mechanisms | |
4be44fcd | 1429 | * in place before we can fully implement this. |
1da177e4 LT |
1430 | */ |
1431 | if (child->status.present) { | |
1432 | status = acpi_get_next_object(ACPI_TYPE_ANY, chandle, | |
1433 | NULL, NULL); | |
1434 | if (ACPI_SUCCESS(status)) { | |
1435 | level++; | |
1436 | phandle = chandle; | |
1437 | chandle = NULL; | |
1438 | parent = child; | |
1439 | } | |
1440 | } | |
1441 | } | |
1442 | ||
d550d98d | 1443 | return 0; |
1da177e4 | 1444 | } |
1da177e4 | 1445 | |
3fb02738 | 1446 | int |
4be44fcd LB |
1447 | acpi_bus_add(struct acpi_device **child, |
1448 | struct acpi_device *parent, acpi_handle handle, int type) | |
3fb02738 RS |
1449 | { |
1450 | int result; | |
1451 | struct acpi_bus_ops ops; | |
1452 | ||
c4168bff LS |
1453 | memset(&ops, 0, sizeof(ops)); |
1454 | ops.acpi_op_add = 1; | |
3fb02738 | 1455 | |
c4168bff LS |
1456 | result = acpi_add_single_object(child, parent, handle, type, &ops); |
1457 | if (!result) | |
3fb02738 | 1458 | result = acpi_bus_scan(*child, &ops); |
c4168bff | 1459 | |
d550d98d | 1460 | return result; |
3fb02738 | 1461 | } |
4be44fcd | 1462 | |
3fb02738 RS |
1463 | EXPORT_SYMBOL(acpi_bus_add); |
1464 | ||
4be44fcd | 1465 | int acpi_bus_start(struct acpi_device *device) |
3fb02738 RS |
1466 | { |
1467 | int result; | |
1468 | struct acpi_bus_ops ops; | |
1469 | ||
3fb02738 RS |
1470 | |
1471 | if (!device) | |
d550d98d | 1472 | return -EINVAL; |
3fb02738 RS |
1473 | |
1474 | result = acpi_start_single_object(device); | |
1475 | if (!result) { | |
1476 | memset(&ops, 0, sizeof(ops)); | |
1477 | ops.acpi_op_start = 1; | |
1478 | result = acpi_bus_scan(device, &ops); | |
1479 | } | |
d550d98d | 1480 | return result; |
3fb02738 | 1481 | } |
4be44fcd | 1482 | |
3fb02738 | 1483 | EXPORT_SYMBOL(acpi_bus_start); |
1da177e4 | 1484 | |
ceaba663 | 1485 | int acpi_bus_trim(struct acpi_device *start, int rmdevice) |
1da177e4 | 1486 | { |
4be44fcd LB |
1487 | acpi_status status; |
1488 | struct acpi_device *parent, *child; | |
1489 | acpi_handle phandle, chandle; | |
1490 | acpi_object_type type; | |
1491 | u32 level = 1; | |
1492 | int err = 0; | |
1493 | ||
1494 | parent = start; | |
1da177e4 LT |
1495 | phandle = start->handle; |
1496 | child = chandle = NULL; | |
1497 | ||
1498 | while ((level > 0) && parent && (!err)) { | |
1499 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, | |
4be44fcd | 1500 | chandle, &chandle); |
1da177e4 LT |
1501 | |
1502 | /* | |
1503 | * If this scope is exhausted then move our way back up. | |
1504 | */ | |
1505 | if (ACPI_FAILURE(status)) { | |
1506 | level--; | |
1507 | chandle = phandle; | |
1508 | acpi_get_parent(phandle, &phandle); | |
1509 | child = parent; | |
1510 | parent = parent->parent; | |
1511 | ||
1512 | if (level == 0) | |
1513 | err = acpi_bus_remove(child, rmdevice); | |
1514 | else | |
1515 | err = acpi_bus_remove(child, 1); | |
1516 | ||
1517 | continue; | |
1518 | } | |
1519 | ||
1520 | status = acpi_get_type(chandle, &type); | |
1521 | if (ACPI_FAILURE(status)) { | |
1522 | continue; | |
1523 | } | |
1524 | /* | |
1525 | * If there is a device corresponding to chandle then | |
1526 | * parse it (depth-first). | |
1527 | */ | |
1528 | if (acpi_bus_get_device(chandle, &child) == 0) { | |
1529 | level++; | |
1530 | phandle = chandle; | |
1531 | chandle = NULL; | |
1532 | parent = child; | |
1533 | } | |
1534 | continue; | |
1535 | } | |
1536 | return err; | |
1537 | } | |
ceaba663 KA |
1538 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
1539 | ||
1da177e4 | 1540 | |
4be44fcd | 1541 | static int acpi_bus_scan_fixed(struct acpi_device *root) |
1da177e4 | 1542 | { |
4be44fcd LB |
1543 | int result = 0; |
1544 | struct acpi_device *device = NULL; | |
c4168bff | 1545 | struct acpi_bus_ops ops; |
1da177e4 LT |
1546 | |
1547 | if (!root) | |
d550d98d | 1548 | return -ENODEV; |
1da177e4 | 1549 | |
c4168bff LS |
1550 | memset(&ops, 0, sizeof(ops)); |
1551 | ops.acpi_op_add = 1; | |
1552 | ops.acpi_op_start = 1; | |
1553 | ||
1da177e4 LT |
1554 | /* |
1555 | * Enumerate all fixed-feature devices. | |
1556 | */ | |
cee324b1 | 1557 | if ((acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON) == 0) { |
3fb02738 | 1558 | result = acpi_add_single_object(&device, acpi_root, |
4be44fcd | 1559 | NULL, |
c4168bff LS |
1560 | ACPI_BUS_TYPE_POWER_BUTTON, |
1561 | &ops); | |
3fb02738 | 1562 | } |
1da177e4 | 1563 | |
cee324b1 | 1564 | if ((acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON) == 0) { |
3fb02738 | 1565 | result = acpi_add_single_object(&device, acpi_root, |
4be44fcd | 1566 | NULL, |
c4168bff LS |
1567 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
1568 | &ops); | |
3fb02738 | 1569 | } |
1da177e4 | 1570 | |
d550d98d | 1571 | return result; |
1da177e4 LT |
1572 | } |
1573 | ||
c04209a7 AS |
1574 | int __init acpi_boot_ec_enable(void); |
1575 | ||
1da177e4 LT |
1576 | static int __init acpi_scan_init(void) |
1577 | { | |
1578 | int result; | |
3fb02738 | 1579 | struct acpi_bus_ops ops; |
1da177e4 | 1580 | |
1da177e4 LT |
1581 | |
1582 | if (acpi_disabled) | |
d550d98d | 1583 | return 0; |
1da177e4 | 1584 | |
c4168bff LS |
1585 | memset(&ops, 0, sizeof(ops)); |
1586 | ops.acpi_op_add = 1; | |
1587 | ops.acpi_op_start = 1; | |
1da177e4 | 1588 | |
5b327265 PM |
1589 | result = bus_register(&acpi_bus_type); |
1590 | if (result) { | |
1591 | /* We don't want to quit even if we failed to add suspend/resume */ | |
1592 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
1593 | } | |
1594 | ||
1da177e4 LT |
1595 | /* |
1596 | * Create the root device in the bus's device tree | |
1597 | */ | |
3fb02738 | 1598 | result = acpi_add_single_object(&acpi_root, NULL, ACPI_ROOT_OBJECT, |
c4168bff | 1599 | ACPI_BUS_TYPE_SYSTEM, &ops); |
1da177e4 LT |
1600 | if (result) |
1601 | goto Done; | |
1602 | ||
1603 | /* | |
1604 | * Enumerate devices in the ACPI namespace. | |
1605 | */ | |
1606 | result = acpi_bus_scan_fixed(acpi_root); | |
c04209a7 AS |
1607 | |
1608 | /* EC region might be needed at bus_scan, so enable it now */ | |
1609 | acpi_boot_ec_enable(); | |
1610 | ||
c4168bff | 1611 | if (!result) |
3fb02738 | 1612 | result = acpi_bus_scan(acpi_root, &ops); |
1da177e4 LT |
1613 | |
1614 | if (result) | |
1615 | acpi_device_unregister(acpi_root, ACPI_BUS_REMOVAL_NORMAL); | |
1616 | ||
4be44fcd | 1617 | Done: |
d550d98d | 1618 | return result; |
1da177e4 LT |
1619 | } |
1620 | ||
1621 | subsys_initcall(acpi_scan_init); |