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 LT |
8 | #include <linux/acpi.h> |
9 | ||
10 | #include <acpi/acpi_drivers.h> | |
11 | #include <acpi/acinterp.h> /* for acpi_ex_eisa_id_to_string() */ | |
12 | ||
1da177e4 | 13 | #define _COMPONENT ACPI_BUS_COMPONENT |
4be44fcd | 14 | ACPI_MODULE_NAME("scan") |
1da177e4 | 15 | #define STRUCT_TO_INT(s) (*((int*)&s)) |
4be44fcd | 16 | extern struct acpi_device *acpi_root; |
1da177e4 LT |
17 | |
18 | #define ACPI_BUS_CLASS "system_bus" | |
19 | #define ACPI_BUS_HID "ACPI_BUS" | |
20 | #define ACPI_BUS_DRIVER_NAME "ACPI Bus Driver" | |
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 ZR |
28 | struct acpi_device_bus_id{ |
29 | char bus_id[9]; | |
30 | unsigned int instance_no; | |
31 | struct list_head node; | |
32 | }; | |
4be44fcd | 33 | static int acpi_eject_operation(acpi_handle handle, int lockable) |
1da177e4 LT |
34 | { |
35 | struct acpi_object_list arg_list; | |
36 | union acpi_object arg; | |
37 | acpi_status status = AE_OK; | |
38 | ||
39 | /* | |
40 | * TBD: evaluate _PS3? | |
41 | */ | |
42 | ||
43 | if (lockable) { | |
44 | arg_list.count = 1; | |
45 | arg_list.pointer = &arg; | |
46 | arg.type = ACPI_TYPE_INTEGER; | |
47 | arg.integer.value = 0; | |
48 | acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); | |
49 | } | |
50 | ||
51 | arg_list.count = 1; | |
52 | arg_list.pointer = &arg; | |
53 | arg.type = ACPI_TYPE_INTEGER; | |
54 | arg.integer.value = 1; | |
55 | ||
56 | /* | |
57 | * TBD: _EJD support. | |
58 | */ | |
59 | ||
60 | status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); | |
61 | if (ACPI_FAILURE(status)) { | |
4be44fcd | 62 | return (-ENODEV); |
1da177e4 LT |
63 | } |
64 | ||
4be44fcd | 65 | return (0); |
1da177e4 LT |
66 | } |
67 | ||
1da177e4 | 68 | static ssize_t |
f883d9db PM |
69 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
70 | const char *buf, size_t count) | |
1da177e4 | 71 | { |
4be44fcd LB |
72 | int result; |
73 | int ret = count; | |
74 | int islockable; | |
75 | acpi_status status; | |
76 | acpi_handle handle; | |
77 | acpi_object_type type = 0; | |
f883d9db | 78 | struct acpi_device *acpi_device = to_acpi_device(d); |
1da177e4 LT |
79 | |
80 | if ((!count) || (buf[0] != '1')) { | |
81 | return -EINVAL; | |
82 | } | |
1da177e4 | 83 | #ifndef FORCE_EJECT |
f883d9db | 84 | if (acpi_device->driver == NULL) { |
1da177e4 LT |
85 | ret = -ENODEV; |
86 | goto err; | |
87 | } | |
88 | #endif | |
f883d9db PM |
89 | status = acpi_get_type(acpi_device->handle, &type); |
90 | if (ACPI_FAILURE(status) || (!acpi_device->flags.ejectable)) { | |
1da177e4 LT |
91 | ret = -ENODEV; |
92 | goto err; | |
93 | } | |
94 | ||
f883d9db PM |
95 | islockable = acpi_device->flags.lockable; |
96 | handle = acpi_device->handle; | |
1da177e4 | 97 | |
f883d9db | 98 | result = acpi_bus_trim(acpi_device, 1); |
1da177e4 LT |
99 | |
100 | if (!result) | |
101 | result = acpi_eject_operation(handle, islockable); | |
102 | ||
103 | if (result) { | |
104 | ret = -EBUSY; | |
105 | } | |
4be44fcd | 106 | err: |
1da177e4 LT |
107 | return ret; |
108 | } | |
109 | ||
f883d9db PM |
110 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
111 | ||
e49bd2dd ZR |
112 | static ssize_t |
113 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
114 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
115 | ||
116 | return sprintf(buf, "%s\n", acpi_dev->pnp.hardware_id); | |
117 | } | |
118 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); | |
119 | ||
120 | static ssize_t | |
121 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
122 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
123 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
124 | int result; | |
125 | ||
126 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); | |
127 | if(result) | |
128 | goto end; | |
129 | ||
130 | result = sprintf(buf, "%s\n", (char*)path.pointer); | |
131 | kfree(path.pointer); | |
132 | end: | |
133 | return result; | |
134 | } | |
135 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); | |
136 | ||
137 | static int acpi_device_setup_files(struct acpi_device *dev) | |
f883d9db PM |
138 | { |
139 | acpi_status status; | |
140 | acpi_handle temp; | |
e49bd2dd | 141 | int result = 0; |
f883d9db PM |
142 | |
143 | /* | |
e49bd2dd | 144 | * Devices gotten from FADT don't have a "path" attribute |
f883d9db | 145 | */ |
e49bd2dd ZR |
146 | if(dev->handle) { |
147 | result = device_create_file(&dev->dev, &dev_attr_path); | |
148 | if(result) | |
149 | goto end; | |
150 | } | |
151 | ||
152 | if(dev->flags.hardware_id) { | |
153 | result = device_create_file(&dev->dev, &dev_attr_hid); | |
154 | if(result) | |
155 | goto end; | |
156 | } | |
157 | ||
158 | /* | |
159 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
160 | * hot-removal function from userland. | |
161 | */ | |
f883d9db PM |
162 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); |
163 | if (ACPI_SUCCESS(status)) | |
e49bd2dd ZR |
164 | result = device_create_file(&dev->dev, &dev_attr_eject); |
165 | end: | |
166 | return result; | |
f883d9db PM |
167 | } |
168 | ||
169 | static void acpi_device_remove_files(struct acpi_device *dev) | |
170 | { | |
171 | acpi_status status; | |
172 | acpi_handle temp; | |
173 | ||
174 | /* | |
175 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
176 | * hot-removal function from userland. | |
177 | */ | |
178 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); | |
179 | if (ACPI_SUCCESS(status)) | |
180 | device_remove_file(&dev->dev, &dev_attr_eject); | |
e49bd2dd ZR |
181 | |
182 | if(dev->flags.hardware_id) | |
183 | device_remove_file(&dev->dev, &dev_attr_hid); | |
184 | if(dev->handle) | |
185 | device_remove_file(&dev->dev, &dev_attr_path); | |
f883d9db | 186 | } |
1da177e4 | 187 | /* -------------------------------------------------------------------------- |
9e89dde2 | 188 | ACPI Bus operations |
1da177e4 | 189 | -------------------------------------------------------------------------- */ |
1890a97a PM |
190 | static void acpi_device_release(struct device *dev) |
191 | { | |
192 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
193 | ||
194 | kfree(acpi_dev->pnp.cid_list); | |
195 | kfree(acpi_dev); | |
196 | } | |
197 | ||
5d9464a4 | 198 | static int acpi_device_suspend(struct device *dev, pm_message_t state) |
1da177e4 | 199 | { |
5d9464a4 PM |
200 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
201 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
9e89dde2 | 202 | |
5d9464a4 PM |
203 | if (acpi_drv && acpi_drv->ops.suspend) |
204 | return acpi_drv->ops.suspend(acpi_dev, state); | |
1da177e4 LT |
205 | return 0; |
206 | } | |
207 | ||
5d9464a4 | 208 | static int acpi_device_resume(struct device *dev) |
9e89dde2 | 209 | { |
5d9464a4 PM |
210 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
211 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
1da177e4 | 212 | |
5d9464a4 PM |
213 | if (acpi_drv && acpi_drv->ops.resume) |
214 | return acpi_drv->ops.resume(acpi_dev); | |
9e89dde2 ZR |
215 | return 0; |
216 | } | |
217 | ||
5d9464a4 | 218 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 219 | { |
5d9464a4 PM |
220 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
221 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
9e89dde2 | 222 | |
5d9464a4 PM |
223 | return !acpi_match_ids(acpi_dev, acpi_drv->ids); |
224 | } | |
225 | ||
226 | static int acpi_device_uevent(struct device *dev, char **envp, int num_envp, | |
227 | char *buffer, int buffer_size) | |
228 | { | |
229 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
230 | int i = 0, length = 0, ret = 0; | |
231 | ||
232 | if (acpi_dev->flags.hardware_id) | |
233 | ret = add_uevent_var(envp, num_envp, &i, | |
234 | buffer, buffer_size, &length, | |
235 | "HWID=%s", acpi_dev->pnp.hardware_id); | |
236 | if (ret) | |
237 | return -ENOMEM; | |
238 | if (acpi_dev->flags.compatible_ids) { | |
239 | int j; | |
240 | struct acpi_compatible_id_list *cid_list; | |
241 | ||
242 | cid_list = acpi_dev->pnp.cid_list; | |
243 | ||
244 | for (j = 0; j < cid_list->count; j++) { | |
245 | ret = add_uevent_var(envp, num_envp, &i, buffer, | |
246 | buffer_size, &length, "COMPTID=%s", | |
247 | cid_list->id[j].value); | |
248 | if (ret) | |
249 | return -ENOMEM; | |
9e89dde2 ZR |
250 | } |
251 | } | |
5d9464a4 PM |
252 | |
253 | envp[i] = NULL; | |
9e89dde2 ZR |
254 | return 0; |
255 | } | |
256 | ||
5d9464a4 PM |
257 | static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *); |
258 | static int acpi_start_single_object(struct acpi_device *); | |
259 | static int acpi_device_probe(struct device * dev) | |
9e89dde2 | 260 | { |
5d9464a4 PM |
261 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
262 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
263 | int ret; | |
264 | ||
265 | ret = acpi_bus_driver_init(acpi_dev, acpi_drv); | |
266 | if (!ret) { | |
c4168bff LS |
267 | if (acpi_dev->bus_ops.acpi_op_start) |
268 | acpi_start_single_object(acpi_dev); | |
5d9464a4 PM |
269 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
270 | "Found driver [%s] for device [%s]\n", | |
271 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
272 | get_device(dev); | |
273 | } | |
274 | return ret; | |
275 | } | |
9e89dde2 | 276 | |
5d9464a4 PM |
277 | static int acpi_device_remove(struct device * dev) |
278 | { | |
279 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
280 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
281 | ||
282 | if (acpi_drv) { | |
283 | if (acpi_drv->ops.stop) | |
96333578 | 284 | acpi_drv->ops.stop(acpi_dev, acpi_dev->removal_type); |
5d9464a4 | 285 | if (acpi_drv->ops.remove) |
96333578 | 286 | acpi_drv->ops.remove(acpi_dev, acpi_dev->removal_type); |
5d9464a4 PM |
287 | } |
288 | acpi_dev->driver = NULL; | |
289 | acpi_driver_data(dev) = NULL; | |
290 | ||
291 | put_device(dev); | |
9e89dde2 ZR |
292 | return 0; |
293 | } | |
1da177e4 | 294 | |
5d9464a4 | 295 | static void acpi_device_shutdown(struct device *dev) |
1da177e4 | 296 | { |
5d9464a4 PM |
297 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
298 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
299 | ||
300 | if (acpi_drv && acpi_drv->ops.shutdown) | |
301 | acpi_drv->ops.shutdown(acpi_dev); | |
302 | ||
303 | return ; | |
1da177e4 LT |
304 | } |
305 | ||
9e89dde2 ZR |
306 | static struct bus_type acpi_bus_type = { |
307 | .name = "acpi", | |
308 | .suspend = acpi_device_suspend, | |
309 | .resume = acpi_device_resume, | |
5d9464a4 PM |
310 | .shutdown = acpi_device_shutdown, |
311 | .match = acpi_bus_match, | |
312 | .probe = acpi_device_probe, | |
313 | .remove = acpi_device_remove, | |
314 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
315 | }; |
316 | ||
e49bd2dd | 317 | static int acpi_device_register(struct acpi_device *device, |
9e89dde2 ZR |
318 | struct acpi_device *parent) |
319 | { | |
e49bd2dd ZR |
320 | int result; |
321 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; | |
322 | int found = 0; | |
9e89dde2 ZR |
323 | /* |
324 | * Linkage | |
325 | * ------- | |
326 | * Link this device to its parent and siblings. | |
327 | */ | |
328 | INIT_LIST_HEAD(&device->children); | |
329 | INIT_LIST_HEAD(&device->node); | |
330 | INIT_LIST_HEAD(&device->g_list); | |
331 | INIT_LIST_HEAD(&device->wakeup_list); | |
332 | ||
e49bd2dd ZR |
333 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
334 | if (!new_bus_id) { | |
335 | printk(KERN_ERR PREFIX "Memory allocation error\n"); | |
336 | return -ENOMEM; | |
337 | } | |
338 | ||
9e89dde2 | 339 | spin_lock(&acpi_device_lock); |
e49bd2dd ZR |
340 | /* |
341 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
342 | * If failed, create one and link it into acpi_bus_id_list | |
343 | */ | |
344 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
345 | if(!strcmp(acpi_device_bus_id->bus_id, device->flags.hardware_id? device->pnp.hardware_id : "PNPIDNON")) { | |
346 | acpi_device_bus_id->instance_no ++; | |
347 | found = 1; | |
348 | kfree(new_bus_id); | |
349 | break; | |
350 | } | |
351 | } | |
352 | if(!found) { | |
353 | acpi_device_bus_id = new_bus_id; | |
354 | strcpy(acpi_device_bus_id->bus_id, device->flags.hardware_id ? device->pnp.hardware_id : "PNPIDNON"); | |
355 | acpi_device_bus_id->instance_no = 0; | |
356 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
357 | } | |
358 | sprintf(device->dev.bus_id, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); | |
359 | ||
9e89dde2 ZR |
360 | if (device->parent) { |
361 | list_add_tail(&device->node, &device->parent->children); | |
362 | list_add_tail(&device->g_list, &device->parent->g_list); | |
363 | } else | |
364 | list_add_tail(&device->g_list, &acpi_device_list); | |
365 | if (device->wakeup.flags.valid) | |
366 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
367 | spin_unlock(&acpi_device_lock); | |
368 | ||
1890a97a PM |
369 | if (device->parent) |
370 | device->dev.parent = &parent->dev; | |
371 | device->dev.bus = &acpi_bus_type; | |
372 | device_initialize(&device->dev); | |
1890a97a | 373 | device->dev.release = &acpi_device_release; |
e49bd2dd ZR |
374 | result = device_add(&device->dev); |
375 | if(result) { | |
376 | printk("Error adding device %s", device->dev.bus_id); | |
377 | goto end; | |
378 | } | |
379 | ||
380 | result = acpi_device_setup_files(device); | |
381 | if(result) | |
382 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error creating sysfs interface for device %s\n", device->dev.bus_id)); | |
f883d9db | 383 | |
96333578 | 384 | device->removal_type = ACPI_BUS_REMOVAL_NORMAL; |
e49bd2dd ZR |
385 | return 0; |
386 | end: | |
387 | spin_lock(&acpi_device_lock); | |
388 | if (device->parent) { | |
389 | list_del(&device->node); | |
390 | list_del(&device->g_list); | |
391 | } else | |
392 | list_del(&device->g_list); | |
393 | list_del(&device->wakeup_list); | |
394 | spin_unlock(&acpi_device_lock); | |
395 | return result; | |
9e89dde2 ZR |
396 | } |
397 | ||
398 | static void acpi_device_unregister(struct acpi_device *device, int type) | |
399 | { | |
400 | spin_lock(&acpi_device_lock); | |
401 | if (device->parent) { | |
402 | list_del(&device->node); | |
403 | list_del(&device->g_list); | |
404 | } else | |
405 | list_del(&device->g_list); | |
406 | ||
407 | list_del(&device->wakeup_list); | |
9e89dde2 ZR |
408 | spin_unlock(&acpi_device_lock); |
409 | ||
410 | acpi_detach_data(device->handle, acpi_bus_data_handler); | |
1890a97a | 411 | |
f883d9db | 412 | acpi_device_remove_files(device); |
1890a97a | 413 | device_unregister(&device->dev); |
9e89dde2 ZR |
414 | } |
415 | ||
416 | /* -------------------------------------------------------------------------- | |
417 | Driver Management | |
418 | -------------------------------------------------------------------------- */ | |
1da177e4 | 419 | /** |
d758a8fa RD |
420 | * acpi_bus_driver_init - add a device to a driver |
421 | * @device: the device to add and initialize | |
422 | * @driver: driver for the device | |
423 | * | |
1da177e4 | 424 | * Used to initialize a device via its device driver. Called whenever a |
1890a97a | 425 | * driver is bound to a device. Invokes the driver's add() ops. |
1da177e4 LT |
426 | */ |
427 | static int | |
4be44fcd | 428 | acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) |
1da177e4 | 429 | { |
4be44fcd | 430 | int result = 0; |
1da177e4 | 431 | |
1da177e4 LT |
432 | |
433 | if (!device || !driver) | |
d550d98d | 434 | return -EINVAL; |
1da177e4 LT |
435 | |
436 | if (!driver->ops.add) | |
d550d98d | 437 | return -ENOSYS; |
1da177e4 LT |
438 | |
439 | result = driver->ops.add(device); | |
440 | if (result) { | |
441 | device->driver = NULL; | |
442 | acpi_driver_data(device) = NULL; | |
d550d98d | 443 | return result; |
1da177e4 LT |
444 | } |
445 | ||
446 | device->driver = driver; | |
447 | ||
448 | /* | |
449 | * TBD - Configuration Management: Assign resources to device based | |
450 | * upon possible configuration and currently allocated resources. | |
451 | */ | |
452 | ||
4be44fcd LB |
453 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
454 | "Driver successfully bound to device\n")); | |
d550d98d | 455 | return 0; |
3fb02738 RS |
456 | } |
457 | ||
8713cbef | 458 | static int acpi_start_single_object(struct acpi_device *device) |
3fb02738 RS |
459 | { |
460 | int result = 0; | |
461 | struct acpi_driver *driver; | |
462 | ||
3fb02738 RS |
463 | |
464 | if (!(driver = device->driver)) | |
d550d98d | 465 | return 0; |
3fb02738 | 466 | |
1da177e4 LT |
467 | if (driver->ops.start) { |
468 | result = driver->ops.start(device); | |
469 | if (result && driver->ops.remove) | |
470 | driver->ops.remove(device, ACPI_BUS_REMOVAL_NORMAL); | |
1da177e4 LT |
471 | } |
472 | ||
d550d98d | 473 | return result; |
1da177e4 LT |
474 | } |
475 | ||
9e89dde2 ZR |
476 | /** |
477 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
478 | * @driver: driver being registered | |
479 | * | |
480 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
481 | * devices that match the driver's criteria and binds. Returns zero for | |
482 | * success or a negative error status for failure. | |
483 | */ | |
484 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
485 | { | |
1890a97a | 486 | int ret; |
9e89dde2 ZR |
487 | |
488 | if (acpi_disabled) | |
489 | return -ENODEV; | |
1890a97a PM |
490 | driver->drv.name = driver->name; |
491 | driver->drv.bus = &acpi_bus_type; | |
492 | driver->drv.owner = driver->owner; | |
9e89dde2 | 493 | |
1890a97a PM |
494 | ret = driver_register(&driver->drv); |
495 | return ret; | |
9e89dde2 ZR |
496 | } |
497 | ||
498 | EXPORT_SYMBOL(acpi_bus_register_driver); | |
499 | ||
500 | /** | |
501 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus | |
502 | * @driver: driver to unregister | |
503 | * | |
504 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
505 | * devices that match the driver's criteria and unbinds. | |
506 | */ | |
507 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
508 | { | |
1890a97a | 509 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
510 | } |
511 | ||
512 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
513 | ||
9e89dde2 ZR |
514 | /* -------------------------------------------------------------------------- |
515 | Device Enumeration | |
516 | -------------------------------------------------------------------------- */ | |
517 | acpi_status | |
518 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
519 | { | |
520 | acpi_status status; | |
521 | acpi_handle tmp; | |
522 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
523 | union acpi_object *obj; | |
524 | ||
525 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
526 | if (ACPI_FAILURE(status)) | |
527 | return status; | |
528 | ||
529 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
530 | if (ACPI_SUCCESS(status)) { | |
531 | obj = buffer.pointer; | |
532 | status = acpi_get_handle(NULL, obj->string.pointer, ejd); | |
533 | kfree(buffer.pointer); | |
534 | } | |
535 | return status; | |
536 | } | |
537 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
538 | ||
539 | void acpi_bus_data_handler(acpi_handle handle, u32 function, void *context) | |
540 | { | |
541 | ||
542 | /* TBD */ | |
543 | ||
544 | return; | |
545 | } | |
546 | ||
547 | int acpi_match_ids(struct acpi_device *device, char *ids) | |
548 | { | |
549 | if (device->flags.hardware_id) | |
550 | if (strstr(ids, device->pnp.hardware_id)) | |
551 | return 0; | |
552 | ||
553 | if (device->flags.compatible_ids) { | |
554 | struct acpi_compatible_id_list *cid_list = device->pnp.cid_list; | |
555 | int i; | |
556 | ||
557 | /* compare multiple _CID entries against driver ids */ | |
558 | for (i = 0; i < cid_list->count; i++) { | |
559 | if (strstr(ids, cid_list->id[i].value)) | |
560 | return 0; | |
561 | } | |
562 | } | |
563 | return -ENOENT; | |
564 | } | |
565 | ||
566 | static int acpi_bus_get_perf_flags(struct acpi_device *device) | |
567 | { | |
568 | device->performance.state = ACPI_STATE_UNKNOWN; | |
569 | return 0; | |
570 | } | |
571 | ||
572 | static acpi_status | |
573 | acpi_bus_extract_wakeup_device_power_package(struct acpi_device *device, | |
574 | union acpi_object *package) | |
575 | { | |
576 | int i = 0; | |
577 | union acpi_object *element = NULL; | |
578 | ||
579 | if (!device || !package || (package->package.count < 2)) | |
580 | return AE_BAD_PARAMETER; | |
581 | ||
582 | element = &(package->package.elements[0]); | |
583 | if (!element) | |
584 | return AE_BAD_PARAMETER; | |
585 | if (element->type == ACPI_TYPE_PACKAGE) { | |
586 | if ((element->package.count < 2) || | |
587 | (element->package.elements[0].type != | |
588 | ACPI_TYPE_LOCAL_REFERENCE) | |
589 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) | |
590 | return AE_BAD_DATA; | |
591 | device->wakeup.gpe_device = | |
592 | element->package.elements[0].reference.handle; | |
593 | device->wakeup.gpe_number = | |
594 | (u32) element->package.elements[1].integer.value; | |
595 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
596 | device->wakeup.gpe_number = element->integer.value; | |
597 | } else | |
598 | return AE_BAD_DATA; | |
599 | ||
600 | element = &(package->package.elements[1]); | |
601 | if (element->type != ACPI_TYPE_INTEGER) { | |
602 | return AE_BAD_DATA; | |
603 | } | |
604 | device->wakeup.sleep_state = element->integer.value; | |
605 | ||
606 | if ((package->package.count - 2) > ACPI_MAX_HANDLES) { | |
607 | return AE_NO_MEMORY; | |
608 | } | |
609 | device->wakeup.resources.count = package->package.count - 2; | |
610 | for (i = 0; i < device->wakeup.resources.count; i++) { | |
611 | element = &(package->package.elements[i + 2]); | |
612 | if (element->type != ACPI_TYPE_ANY) { | |
613 | return AE_BAD_DATA; | |
614 | } | |
615 | ||
616 | device->wakeup.resources.handles[i] = element->reference.handle; | |
617 | } | |
618 | ||
619 | return AE_OK; | |
1da177e4 LT |
620 | } |
621 | ||
9e89dde2 | 622 | static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
1da177e4 | 623 | { |
9e89dde2 ZR |
624 | acpi_status status = 0; |
625 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
626 | union acpi_object *package = NULL; | |
1da177e4 | 627 | |
1da177e4 | 628 | |
9e89dde2 ZR |
629 | /* _PRW */ |
630 | status = acpi_evaluate_object(device->handle, "_PRW", NULL, &buffer); | |
631 | if (ACPI_FAILURE(status)) { | |
632 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
633 | goto end; | |
634 | } | |
1da177e4 | 635 | |
9e89dde2 ZR |
636 | package = (union acpi_object *)buffer.pointer; |
637 | status = acpi_bus_extract_wakeup_device_power_package(device, package); | |
638 | if (ACPI_FAILURE(status)) { | |
639 | ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package")); | |
640 | goto end; | |
641 | } | |
1da177e4 | 642 | |
9e89dde2 | 643 | kfree(buffer.pointer); |
1da177e4 | 644 | |
9e89dde2 ZR |
645 | device->wakeup.flags.valid = 1; |
646 | /* Power button, Lid switch always enable wakeup */ | |
647 | if (!acpi_match_ids(device, "PNP0C0D,PNP0C0C,PNP0C0E")) | |
648 | device->wakeup.flags.run_wake = 1; | |
1a365616 | 649 | |
9e89dde2 ZR |
650 | end: |
651 | if (ACPI_FAILURE(status)) | |
652 | device->flags.wake_capable = 0; | |
653 | return 0; | |
1da177e4 | 654 | } |
4be44fcd | 655 | |
9e89dde2 | 656 | static int acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 657 | { |
9e89dde2 ZR |
658 | acpi_status status = 0; |
659 | acpi_handle handle = NULL; | |
660 | u32 i = 0; | |
1da177e4 | 661 | |
1da177e4 | 662 | |
9e89dde2 ZR |
663 | /* |
664 | * Power Management Flags | |
665 | */ | |
666 | status = acpi_get_handle(device->handle, "_PSC", &handle); | |
667 | if (ACPI_SUCCESS(status)) | |
668 | device->power.flags.explicit_get = 1; | |
669 | status = acpi_get_handle(device->handle, "_IRC", &handle); | |
670 | if (ACPI_SUCCESS(status)) | |
671 | device->power.flags.inrush_current = 1; | |
1da177e4 | 672 | |
9e89dde2 ZR |
673 | /* |
674 | * Enumerate supported power management states | |
675 | */ | |
676 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3; i++) { | |
677 | struct acpi_device_power_state *ps = &device->power.states[i]; | |
678 | char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' }; | |
679 | ||
680 | /* Evaluate "_PRx" to se if power resources are referenced */ | |
681 | acpi_evaluate_reference(device->handle, object_name, NULL, | |
682 | &ps->resources); | |
683 | if (ps->resources.count) { | |
684 | device->power.flags.power_resources = 1; | |
685 | ps->flags.valid = 1; | |
1da177e4 | 686 | } |
1da177e4 | 687 | |
9e89dde2 ZR |
688 | /* Evaluate "_PSx" to see if we can do explicit sets */ |
689 | object_name[2] = 'S'; | |
690 | status = acpi_get_handle(device->handle, object_name, &handle); | |
691 | if (ACPI_SUCCESS(status)) { | |
692 | ps->flags.explicit_set = 1; | |
693 | ps->flags.valid = 1; | |
694 | } | |
1da177e4 | 695 | |
9e89dde2 ZR |
696 | /* State is valid if we have some power control */ |
697 | if (ps->resources.count || ps->flags.explicit_set) | |
698 | ps->flags.valid = 1; | |
1da177e4 | 699 | |
9e89dde2 ZR |
700 | ps->power = -1; /* Unknown - driver assigned */ |
701 | ps->latency = -1; /* Unknown - driver assigned */ | |
702 | } | |
c8f7a62c | 703 | |
9e89dde2 ZR |
704 | /* Set defaults for D0 and D3 states (always valid) */ |
705 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
706 | device->power.states[ACPI_STATE_D0].power = 100; | |
707 | device->power.states[ACPI_STATE_D3].flags.valid = 1; | |
708 | device->power.states[ACPI_STATE_D3].power = 0; | |
c8f7a62c | 709 | |
9e89dde2 ZR |
710 | /* TBD: System wake support and resource requirements. */ |
711 | ||
712 | device->power.state = ACPI_STATE_UNKNOWN; | |
c8f7a62c | 713 | |
9e89dde2 ZR |
714 | return 0; |
715 | } | |
c8f7a62c | 716 | |
4be44fcd | 717 | static int acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 718 | { |
4be44fcd LB |
719 | acpi_status status = AE_OK; |
720 | acpi_handle temp = NULL; | |
1da177e4 | 721 | |
1da177e4 LT |
722 | |
723 | /* Presence of _STA indicates 'dynamic_status' */ | |
724 | status = acpi_get_handle(device->handle, "_STA", &temp); | |
725 | if (ACPI_SUCCESS(status)) | |
726 | device->flags.dynamic_status = 1; | |
727 | ||
728 | /* Presence of _CID indicates 'compatible_ids' */ | |
729 | status = acpi_get_handle(device->handle, "_CID", &temp); | |
730 | if (ACPI_SUCCESS(status)) | |
731 | device->flags.compatible_ids = 1; | |
732 | ||
733 | /* Presence of _RMV indicates 'removable' */ | |
734 | status = acpi_get_handle(device->handle, "_RMV", &temp); | |
735 | if (ACPI_SUCCESS(status)) | |
736 | device->flags.removable = 1; | |
737 | ||
738 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
739 | status = acpi_get_handle(device->handle, "_EJD", &temp); | |
740 | if (ACPI_SUCCESS(status)) | |
741 | device->flags.ejectable = 1; | |
742 | else { | |
743 | status = acpi_get_handle(device->handle, "_EJ0", &temp); | |
744 | if (ACPI_SUCCESS(status)) | |
745 | device->flags.ejectable = 1; | |
746 | } | |
747 | ||
748 | /* Presence of _LCK indicates 'lockable' */ | |
749 | status = acpi_get_handle(device->handle, "_LCK", &temp); | |
750 | if (ACPI_SUCCESS(status)) | |
751 | device->flags.lockable = 1; | |
752 | ||
753 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ | |
754 | status = acpi_get_handle(device->handle, "_PS0", &temp); | |
755 | if (ACPI_FAILURE(status)) | |
756 | status = acpi_get_handle(device->handle, "_PR0", &temp); | |
757 | if (ACPI_SUCCESS(status)) | |
758 | device->flags.power_manageable = 1; | |
759 | ||
760 | /* Presence of _PRW indicates wake capable */ | |
761 | status = acpi_get_handle(device->handle, "_PRW", &temp); | |
762 | if (ACPI_SUCCESS(status)) | |
763 | device->flags.wake_capable = 1; | |
764 | ||
765 | /* TBD: Peformance management */ | |
766 | ||
d550d98d | 767 | return 0; |
1da177e4 LT |
768 | } |
769 | ||
4be44fcd LB |
770 | static void acpi_device_get_busid(struct acpi_device *device, |
771 | acpi_handle handle, int type) | |
1da177e4 | 772 | { |
4be44fcd LB |
773 | char bus_id[5] = { '?', 0 }; |
774 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
775 | int i = 0; | |
1da177e4 LT |
776 | |
777 | /* | |
778 | * Bus ID | |
779 | * ------ | |
780 | * The device's Bus ID is simply the object name. | |
781 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
782 | */ | |
783 | switch (type) { | |
784 | case ACPI_BUS_TYPE_SYSTEM: | |
785 | strcpy(device->pnp.bus_id, "ACPI"); | |
786 | break; | |
787 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
788 | strcpy(device->pnp.bus_id, "PWRF"); | |
789 | break; | |
790 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
791 | strcpy(device->pnp.bus_id, "SLPF"); | |
792 | break; | |
793 | default: | |
794 | acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer); | |
795 | /* Clean up trailing underscores (if any) */ | |
796 | for (i = 3; i > 1; i--) { | |
797 | if (bus_id[i] == '_') | |
798 | bus_id[i] = '\0'; | |
799 | else | |
800 | break; | |
801 | } | |
802 | strcpy(device->pnp.bus_id, bus_id); | |
803 | break; | |
804 | } | |
805 | } | |
806 | ||
ae843332 ZR |
807 | static int |
808 | acpi_video_bus_match(struct acpi_device *device) | |
809 | { | |
810 | acpi_handle h_dummy1; | |
811 | acpi_handle h_dummy2; | |
812 | acpi_handle h_dummy3; | |
813 | ||
814 | ||
815 | if (!device) | |
816 | return -EINVAL; | |
817 | ||
818 | /* Since there is no HID, CID for ACPI Video drivers, we have | |
819 | * to check well known required nodes for each feature we support. | |
820 | */ | |
821 | ||
822 | /* Does this device able to support video switching ? */ | |
823 | if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOD", &h_dummy1)) && | |
824 | ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOS", &h_dummy2))) | |
825 | return 0; | |
826 | ||
827 | /* Does this device able to retrieve a video ROM ? */ | |
828 | if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_ROM", &h_dummy1))) | |
829 | return 0; | |
830 | ||
831 | /* Does this device able to configure which video head to be POSTed ? */ | |
832 | if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_VPO", &h_dummy1)) && | |
833 | ACPI_SUCCESS(acpi_get_handle(device->handle, "_GPD", &h_dummy2)) && | |
834 | ACPI_SUCCESS(acpi_get_handle(device->handle, "_SPD", &h_dummy3))) | |
835 | return 0; | |
836 | ||
837 | return -ENODEV; | |
838 | } | |
839 | ||
840 | static int acpi_pci_bridge_match(struct acpi_device *device) | |
841 | { | |
842 | acpi_status status; | |
843 | acpi_handle handle; | |
844 | ||
845 | /* pci bridge has _PRT but isn't PNP0A03 */ | |
846 | status = acpi_get_handle(device->handle, METHOD_NAME__PRT, &handle); | |
847 | if (ACPI_FAILURE(status)) | |
848 | return -ENODEV; | |
849 | if (!acpi_match_ids(device, "PNP0A03")) | |
850 | return -ENODEV; | |
851 | return 0; | |
852 | } | |
853 | ||
4be44fcd LB |
854 | static void acpi_device_set_id(struct acpi_device *device, |
855 | struct acpi_device *parent, acpi_handle handle, | |
856 | int type) | |
1da177e4 | 857 | { |
4be44fcd LB |
858 | struct acpi_device_info *info; |
859 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
860 | char *hid = NULL; | |
861 | char *uid = NULL; | |
1da177e4 | 862 | struct acpi_compatible_id_list *cid_list = NULL; |
4be44fcd | 863 | acpi_status status; |
1da177e4 LT |
864 | |
865 | switch (type) { | |
866 | case ACPI_BUS_TYPE_DEVICE: | |
867 | status = acpi_get_object_info(handle, &buffer); | |
868 | if (ACPI_FAILURE(status)) { | |
4be44fcd | 869 | printk("%s: Error reading device info\n", __FUNCTION__); |
1da177e4 LT |
870 | return; |
871 | } | |
872 | ||
873 | info = buffer.pointer; | |
874 | if (info->valid & ACPI_VALID_HID) | |
875 | hid = info->hardware_id.value; | |
876 | if (info->valid & ACPI_VALID_UID) | |
877 | uid = info->unique_id.value; | |
878 | if (info->valid & ACPI_VALID_CID) | |
879 | cid_list = &info->compatibility_id; | |
880 | if (info->valid & ACPI_VALID_ADR) { | |
881 | device->pnp.bus_address = info->address; | |
882 | device->flags.bus_address = 1; | |
883 | } | |
ae843332 ZR |
884 | |
885 | if(!(info->valid & (ACPI_VALID_HID | ACPI_VALID_CID))){ | |
886 | status = acpi_video_bus_match(device); | |
887 | if(ACPI_SUCCESS(status)) | |
888 | hid = ACPI_VIDEO_HID; | |
889 | ||
890 | status = acpi_pci_bridge_match(device); | |
891 | if(ACPI_SUCCESS(status)) | |
892 | hid = ACPI_PCI_BRIDGE_HID; | |
893 | } | |
1da177e4 LT |
894 | break; |
895 | case ACPI_BUS_TYPE_POWER: | |
896 | hid = ACPI_POWER_HID; | |
897 | break; | |
898 | case ACPI_BUS_TYPE_PROCESSOR: | |
899 | hid = ACPI_PROCESSOR_HID; | |
900 | break; | |
901 | case ACPI_BUS_TYPE_SYSTEM: | |
902 | hid = ACPI_SYSTEM_HID; | |
903 | break; | |
904 | case ACPI_BUS_TYPE_THERMAL: | |
905 | hid = ACPI_THERMAL_HID; | |
906 | break; | |
907 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
908 | hid = ACPI_BUTTON_HID_POWERF; | |
909 | break; | |
910 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
911 | hid = ACPI_BUTTON_HID_SLEEPF; | |
912 | break; | |
913 | } | |
914 | ||
915 | /* | |
916 | * \_SB | |
917 | * ---- | |
918 | * Fix for the system root bus device -- the only root-level device. | |
919 | */ | |
c51a4de8 | 920 | if (((acpi_handle)parent == ACPI_ROOT_OBJECT) && (type == ACPI_BUS_TYPE_DEVICE)) { |
1da177e4 LT |
921 | hid = ACPI_BUS_HID; |
922 | strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME); | |
923 | strcpy(device->pnp.device_class, ACPI_BUS_CLASS); | |
924 | } | |
925 | ||
926 | if (hid) { | |
927 | strcpy(device->pnp.hardware_id, hid); | |
928 | device->flags.hardware_id = 1; | |
929 | } | |
930 | if (uid) { | |
931 | strcpy(device->pnp.unique_id, uid); | |
932 | device->flags.unique_id = 1; | |
933 | } | |
934 | if (cid_list) { | |
935 | device->pnp.cid_list = kmalloc(cid_list->size, GFP_KERNEL); | |
936 | if (device->pnp.cid_list) | |
937 | memcpy(device->pnp.cid_list, cid_list, cid_list->size); | |
938 | else | |
939 | printk(KERN_ERR "Memory allocation error\n"); | |
940 | } | |
941 | ||
02438d87 | 942 | kfree(buffer.pointer); |
1da177e4 LT |
943 | } |
944 | ||
4be44fcd | 945 | static int acpi_device_set_context(struct acpi_device *device, int type) |
1da177e4 LT |
946 | { |
947 | acpi_status status = AE_OK; | |
948 | int result = 0; | |
949 | /* | |
950 | * Context | |
951 | * ------- | |
952 | * Attach this 'struct acpi_device' to the ACPI object. This makes | |
953 | * resolutions from handle->device very efficient. Note that we need | |
954 | * to be careful with fixed-feature devices as they all attach to the | |
955 | * root object. | |
956 | */ | |
4be44fcd | 957 | if (type != ACPI_BUS_TYPE_POWER_BUTTON && |
1da177e4 LT |
958 | type != ACPI_BUS_TYPE_SLEEP_BUTTON) { |
959 | status = acpi_attach_data(device->handle, | |
4be44fcd | 960 | acpi_bus_data_handler, device); |
1da177e4 LT |
961 | |
962 | if (ACPI_FAILURE(status)) { | |
963 | printk("Error attaching device data\n"); | |
964 | result = -ENODEV; | |
965 | } | |
966 | } | |
967 | return result; | |
968 | } | |
969 | ||
4be44fcd LB |
970 | static void acpi_device_get_debug_info(struct acpi_device *device, |
971 | acpi_handle handle, int type) | |
1da177e4 LT |
972 | { |
973 | #ifdef CONFIG_ACPI_DEBUG_OUTPUT | |
4be44fcd LB |
974 | char *type_string = NULL; |
975 | char name[80] = { '?', '\0' }; | |
976 | struct acpi_buffer buffer = { sizeof(name), name }; | |
1da177e4 LT |
977 | |
978 | switch (type) { | |
979 | case ACPI_BUS_TYPE_DEVICE: | |
980 | type_string = "Device"; | |
981 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
982 | break; | |
983 | case ACPI_BUS_TYPE_POWER: | |
984 | type_string = "Power Resource"; | |
985 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
986 | break; | |
987 | case ACPI_BUS_TYPE_PROCESSOR: | |
988 | type_string = "Processor"; | |
989 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
990 | break; | |
991 | case ACPI_BUS_TYPE_SYSTEM: | |
992 | type_string = "System"; | |
993 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
994 | break; | |
995 | case ACPI_BUS_TYPE_THERMAL: | |
996 | type_string = "Thermal Zone"; | |
997 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
998 | break; | |
999 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
1000 | type_string = "Power Button"; | |
1001 | sprintf(name, "PWRB"); | |
1002 | break; | |
1003 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
1004 | type_string = "Sleep Button"; | |
1005 | sprintf(name, "SLPB"); | |
1006 | break; | |
1007 | } | |
1008 | ||
1009 | printk(KERN_DEBUG "Found %s %s [%p]\n", type_string, name, handle); | |
4be44fcd | 1010 | #endif /*CONFIG_ACPI_DEBUG_OUTPUT */ |
1da177e4 LT |
1011 | } |
1012 | ||
4be44fcd | 1013 | static int acpi_bus_remove(struct acpi_device *dev, int rmdevice) |
1da177e4 | 1014 | { |
1da177e4 | 1015 | if (!dev) |
d550d98d | 1016 | return -EINVAL; |
1da177e4 | 1017 | |
96333578 | 1018 | dev->removal_type = ACPI_BUS_REMOVAL_EJECT; |
1890a97a | 1019 | device_release_driver(&dev->dev); |
1da177e4 LT |
1020 | |
1021 | if (!rmdevice) | |
d550d98d | 1022 | return 0; |
1da177e4 | 1023 | |
1da177e4 LT |
1024 | acpi_device_unregister(dev, ACPI_BUS_REMOVAL_EJECT); |
1025 | ||
d550d98d | 1026 | return 0; |
1da177e4 LT |
1027 | } |
1028 | ||
3fb02738 | 1029 | static int |
4be44fcd | 1030 | acpi_add_single_object(struct acpi_device **child, |
c4168bff LS |
1031 | struct acpi_device *parent, acpi_handle handle, int type, |
1032 | struct acpi_bus_ops *ops) | |
1da177e4 | 1033 | { |
4be44fcd LB |
1034 | int result = 0; |
1035 | struct acpi_device *device = NULL; | |
1da177e4 | 1036 | |
1da177e4 LT |
1037 | |
1038 | if (!child) | |
d550d98d | 1039 | return -EINVAL; |
1da177e4 LT |
1040 | |
1041 | device = kmalloc(sizeof(struct acpi_device), GFP_KERNEL); | |
1042 | if (!device) { | |
6468463a | 1043 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 1044 | return -ENOMEM; |
1da177e4 LT |
1045 | } |
1046 | memset(device, 0, sizeof(struct acpi_device)); | |
1047 | ||
1048 | device->handle = handle; | |
1049 | device->parent = parent; | |
c4168bff LS |
1050 | device->bus_ops = *ops; /* workround for not call .start */ |
1051 | ||
1da177e4 | 1052 | |
4be44fcd | 1053 | acpi_device_get_busid(device, handle, type); |
1da177e4 LT |
1054 | |
1055 | /* | |
1056 | * Flags | |
1057 | * ----- | |
1058 | * Get prior to calling acpi_bus_get_status() so we know whether | |
1059 | * or not _STA is present. Note that we only look for object | |
1060 | * handles -- cannot evaluate objects until we know the device is | |
1061 | * present and properly initialized. | |
1062 | */ | |
1063 | result = acpi_bus_get_flags(device); | |
1064 | if (result) | |
1065 | goto end; | |
1066 | ||
1067 | /* | |
1068 | * Status | |
1069 | * ------ | |
6940faba KT |
1070 | * See if the device is present. We always assume that non-Device |
1071 | * and non-Processor objects (e.g. thermal zones, power resources, | |
1072 | * etc.) are present, functioning, etc. (at least when parent object | |
1073 | * is present). Note that _STA has a different meaning for some | |
1074 | * objects (e.g. power resources) so we need to be careful how we use | |
1075 | * it. | |
1da177e4 LT |
1076 | */ |
1077 | switch (type) { | |
6940faba | 1078 | case ACPI_BUS_TYPE_PROCESSOR: |
1da177e4 LT |
1079 | case ACPI_BUS_TYPE_DEVICE: |
1080 | result = acpi_bus_get_status(device); | |
1081 | if (ACPI_FAILURE(result) || !device->status.present) { | |
1082 | result = -ENOENT; | |
1083 | goto end; | |
1084 | } | |
1085 | break; | |
1086 | default: | |
1087 | STRUCT_TO_INT(device->status) = 0x0F; | |
1088 | break; | |
1089 | } | |
1090 | ||
1091 | /* | |
1092 | * Initialize Device | |
1093 | * ----------------- | |
1094 | * TBD: Synch with Core's enumeration/initialization process. | |
1095 | */ | |
1096 | ||
1097 | /* | |
1098 | * Hardware ID, Unique ID, & Bus Address | |
1099 | * ------------------------------------- | |
1100 | */ | |
4be44fcd | 1101 | acpi_device_set_id(device, parent, handle, type); |
1da177e4 LT |
1102 | |
1103 | /* | |
1104 | * Power Management | |
1105 | * ---------------- | |
1106 | */ | |
1107 | if (device->flags.power_manageable) { | |
1108 | result = acpi_bus_get_power_flags(device); | |
1109 | if (result) | |
1110 | goto end; | |
1111 | } | |
1112 | ||
4be44fcd | 1113 | /* |
1da177e4 LT |
1114 | * Wakeup device management |
1115 | *----------------------- | |
1116 | */ | |
1117 | if (device->flags.wake_capable) { | |
1118 | result = acpi_bus_get_wakeup_device_flags(device); | |
1119 | if (result) | |
1120 | goto end; | |
1121 | } | |
1122 | ||
1123 | /* | |
1124 | * Performance Management | |
1125 | * ---------------------- | |
1126 | */ | |
1127 | if (device->flags.performance_manageable) { | |
1128 | result = acpi_bus_get_perf_flags(device); | |
1129 | if (result) | |
1130 | goto end; | |
1131 | } | |
1132 | ||
4be44fcd | 1133 | if ((result = acpi_device_set_context(device, type))) |
1da177e4 LT |
1134 | goto end; |
1135 | ||
4be44fcd | 1136 | acpi_device_get_debug_info(device, handle, type); |
1da177e4 | 1137 | |
e49bd2dd | 1138 | result = acpi_device_register(device, parent); |
1da177e4 | 1139 | |
4be44fcd | 1140 | end: |
1da177e4 LT |
1141 | if (!result) |
1142 | *child = device; | |
1143 | else { | |
6044ec88 | 1144 | kfree(device->pnp.cid_list); |
1da177e4 LT |
1145 | kfree(device); |
1146 | } | |
1147 | ||
d550d98d | 1148 | return result; |
1da177e4 | 1149 | } |
1da177e4 | 1150 | |
4be44fcd | 1151 | static int acpi_bus_scan(struct acpi_device *start, struct acpi_bus_ops *ops) |
1da177e4 | 1152 | { |
4be44fcd LB |
1153 | acpi_status status = AE_OK; |
1154 | struct acpi_device *parent = NULL; | |
1155 | struct acpi_device *child = NULL; | |
1156 | acpi_handle phandle = NULL; | |
1157 | acpi_handle chandle = NULL; | |
1158 | acpi_object_type type = 0; | |
1159 | u32 level = 1; | |
1da177e4 | 1160 | |
1da177e4 LT |
1161 | |
1162 | if (!start) | |
d550d98d | 1163 | return -EINVAL; |
1da177e4 LT |
1164 | |
1165 | parent = start; | |
1166 | phandle = start->handle; | |
4be44fcd | 1167 | |
1da177e4 LT |
1168 | /* |
1169 | * Parse through the ACPI namespace, identify all 'devices', and | |
1170 | * create a new 'struct acpi_device' for each. | |
1171 | */ | |
1172 | while ((level > 0) && parent) { | |
1173 | ||
1174 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, | |
4be44fcd | 1175 | chandle, &chandle); |
1da177e4 LT |
1176 | |
1177 | /* | |
1178 | * If this scope is exhausted then move our way back up. | |
1179 | */ | |
1180 | if (ACPI_FAILURE(status)) { | |
1181 | level--; | |
1182 | chandle = phandle; | |
1183 | acpi_get_parent(phandle, &phandle); | |
1184 | if (parent->parent) | |
1185 | parent = parent->parent; | |
1186 | continue; | |
1187 | } | |
1188 | ||
1189 | status = acpi_get_type(chandle, &type); | |
1190 | if (ACPI_FAILURE(status)) | |
1191 | continue; | |
1192 | ||
1193 | /* | |
1194 | * If this is a scope object then parse it (depth-first). | |
1195 | */ | |
1196 | if (type == ACPI_TYPE_LOCAL_SCOPE) { | |
1197 | level++; | |
1198 | phandle = chandle; | |
1199 | chandle = NULL; | |
1200 | continue; | |
1201 | } | |
1202 | ||
1203 | /* | |
1204 | * We're only interested in objects that we consider 'devices'. | |
1205 | */ | |
1206 | switch (type) { | |
1207 | case ACPI_TYPE_DEVICE: | |
1208 | type = ACPI_BUS_TYPE_DEVICE; | |
1209 | break; | |
1210 | case ACPI_TYPE_PROCESSOR: | |
1211 | type = ACPI_BUS_TYPE_PROCESSOR; | |
1212 | break; | |
1213 | case ACPI_TYPE_THERMAL: | |
1214 | type = ACPI_BUS_TYPE_THERMAL; | |
1215 | break; | |
1216 | case ACPI_TYPE_POWER: | |
1217 | type = ACPI_BUS_TYPE_POWER; | |
1218 | break; | |
1219 | default: | |
1220 | continue; | |
1221 | } | |
1222 | ||
3fb02738 RS |
1223 | if (ops->acpi_op_add) |
1224 | status = acpi_add_single_object(&child, parent, | |
c4168bff | 1225 | chandle, type, ops); |
4be44fcd | 1226 | else |
3fb02738 RS |
1227 | status = acpi_bus_get_device(chandle, &child); |
1228 | ||
4be44fcd LB |
1229 | if (ACPI_FAILURE(status)) |
1230 | continue; | |
3fb02738 | 1231 | |
c4168bff | 1232 | if (ops->acpi_op_start && !(ops->acpi_op_add)) { |
3fb02738 RS |
1233 | status = acpi_start_single_object(child); |
1234 | if (ACPI_FAILURE(status)) | |
1235 | continue; | |
1236 | } | |
1da177e4 LT |
1237 | |
1238 | /* | |
1239 | * If the device is present, enabled, and functioning then | |
1240 | * parse its scope (depth-first). Note that we need to | |
1241 | * represent absent devices to facilitate PnP notifications | |
1242 | * -- but only the subtree head (not all of its children, | |
1243 | * which will be enumerated when the parent is inserted). | |
1244 | * | |
1245 | * TBD: Need notifications and other detection mechanisms | |
4be44fcd | 1246 | * in place before we can fully implement this. |
1da177e4 LT |
1247 | */ |
1248 | if (child->status.present) { | |
1249 | status = acpi_get_next_object(ACPI_TYPE_ANY, chandle, | |
1250 | NULL, NULL); | |
1251 | if (ACPI_SUCCESS(status)) { | |
1252 | level++; | |
1253 | phandle = chandle; | |
1254 | chandle = NULL; | |
1255 | parent = child; | |
1256 | } | |
1257 | } | |
1258 | } | |
1259 | ||
d550d98d | 1260 | return 0; |
1da177e4 | 1261 | } |
1da177e4 | 1262 | |
3fb02738 | 1263 | int |
4be44fcd LB |
1264 | acpi_bus_add(struct acpi_device **child, |
1265 | struct acpi_device *parent, acpi_handle handle, int type) | |
3fb02738 RS |
1266 | { |
1267 | int result; | |
1268 | struct acpi_bus_ops ops; | |
1269 | ||
c4168bff LS |
1270 | memset(&ops, 0, sizeof(ops)); |
1271 | ops.acpi_op_add = 1; | |
3fb02738 | 1272 | |
c4168bff LS |
1273 | result = acpi_add_single_object(child, parent, handle, type, &ops); |
1274 | if (!result) | |
3fb02738 | 1275 | result = acpi_bus_scan(*child, &ops); |
c4168bff | 1276 | |
d550d98d | 1277 | return result; |
3fb02738 | 1278 | } |
4be44fcd | 1279 | |
3fb02738 RS |
1280 | EXPORT_SYMBOL(acpi_bus_add); |
1281 | ||
4be44fcd | 1282 | int acpi_bus_start(struct acpi_device *device) |
3fb02738 RS |
1283 | { |
1284 | int result; | |
1285 | struct acpi_bus_ops ops; | |
1286 | ||
3fb02738 RS |
1287 | |
1288 | if (!device) | |
d550d98d | 1289 | return -EINVAL; |
3fb02738 RS |
1290 | |
1291 | result = acpi_start_single_object(device); | |
1292 | if (!result) { | |
1293 | memset(&ops, 0, sizeof(ops)); | |
1294 | ops.acpi_op_start = 1; | |
1295 | result = acpi_bus_scan(device, &ops); | |
1296 | } | |
d550d98d | 1297 | return result; |
3fb02738 | 1298 | } |
4be44fcd | 1299 | |
3fb02738 | 1300 | EXPORT_SYMBOL(acpi_bus_start); |
1da177e4 | 1301 | |
ceaba663 | 1302 | int acpi_bus_trim(struct acpi_device *start, int rmdevice) |
1da177e4 | 1303 | { |
4be44fcd LB |
1304 | acpi_status status; |
1305 | struct acpi_device *parent, *child; | |
1306 | acpi_handle phandle, chandle; | |
1307 | acpi_object_type type; | |
1308 | u32 level = 1; | |
1309 | int err = 0; | |
1310 | ||
1311 | parent = start; | |
1da177e4 LT |
1312 | phandle = start->handle; |
1313 | child = chandle = NULL; | |
1314 | ||
1315 | while ((level > 0) && parent && (!err)) { | |
1316 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, | |
4be44fcd | 1317 | chandle, &chandle); |
1da177e4 LT |
1318 | |
1319 | /* | |
1320 | * If this scope is exhausted then move our way back up. | |
1321 | */ | |
1322 | if (ACPI_FAILURE(status)) { | |
1323 | level--; | |
1324 | chandle = phandle; | |
1325 | acpi_get_parent(phandle, &phandle); | |
1326 | child = parent; | |
1327 | parent = parent->parent; | |
1328 | ||
1329 | if (level == 0) | |
1330 | err = acpi_bus_remove(child, rmdevice); | |
1331 | else | |
1332 | err = acpi_bus_remove(child, 1); | |
1333 | ||
1334 | continue; | |
1335 | } | |
1336 | ||
1337 | status = acpi_get_type(chandle, &type); | |
1338 | if (ACPI_FAILURE(status)) { | |
1339 | continue; | |
1340 | } | |
1341 | /* | |
1342 | * If there is a device corresponding to chandle then | |
1343 | * parse it (depth-first). | |
1344 | */ | |
1345 | if (acpi_bus_get_device(chandle, &child) == 0) { | |
1346 | level++; | |
1347 | phandle = chandle; | |
1348 | chandle = NULL; | |
1349 | parent = child; | |
1350 | } | |
1351 | continue; | |
1352 | } | |
1353 | return err; | |
1354 | } | |
ceaba663 KA |
1355 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
1356 | ||
1da177e4 | 1357 | |
4be44fcd | 1358 | static int acpi_bus_scan_fixed(struct acpi_device *root) |
1da177e4 | 1359 | { |
4be44fcd LB |
1360 | int result = 0; |
1361 | struct acpi_device *device = NULL; | |
c4168bff | 1362 | struct acpi_bus_ops ops; |
1da177e4 LT |
1363 | |
1364 | if (!root) | |
d550d98d | 1365 | return -ENODEV; |
1da177e4 | 1366 | |
c4168bff LS |
1367 | memset(&ops, 0, sizeof(ops)); |
1368 | ops.acpi_op_add = 1; | |
1369 | ops.acpi_op_start = 1; | |
1370 | ||
1da177e4 LT |
1371 | /* |
1372 | * Enumerate all fixed-feature devices. | |
1373 | */ | |
3fb02738 RS |
1374 | if (acpi_fadt.pwr_button == 0) { |
1375 | result = acpi_add_single_object(&device, acpi_root, | |
4be44fcd | 1376 | NULL, |
c4168bff LS |
1377 | ACPI_BUS_TYPE_POWER_BUTTON, |
1378 | &ops); | |
3fb02738 | 1379 | } |
1da177e4 | 1380 | |
3fb02738 RS |
1381 | if (acpi_fadt.sleep_button == 0) { |
1382 | result = acpi_add_single_object(&device, acpi_root, | |
4be44fcd | 1383 | NULL, |
c4168bff LS |
1384 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
1385 | &ops); | |
3fb02738 | 1386 | } |
1da177e4 | 1387 | |
d550d98d | 1388 | return result; |
1da177e4 LT |
1389 | } |
1390 | ||
1da177e4 LT |
1391 | static int __init acpi_scan_init(void) |
1392 | { | |
1393 | int result; | |
3fb02738 | 1394 | struct acpi_bus_ops ops; |
1da177e4 | 1395 | |
1da177e4 LT |
1396 | |
1397 | if (acpi_disabled) | |
d550d98d | 1398 | return 0; |
1da177e4 | 1399 | |
c4168bff LS |
1400 | memset(&ops, 0, sizeof(ops)); |
1401 | ops.acpi_op_add = 1; | |
1402 | ops.acpi_op_start = 1; | |
1403 | ||
5b327265 PM |
1404 | result = bus_register(&acpi_bus_type); |
1405 | if (result) { | |
1406 | /* We don't want to quit even if we failed to add suspend/resume */ | |
1407 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
1408 | } | |
1409 | ||
1da177e4 LT |
1410 | /* |
1411 | * Create the root device in the bus's device tree | |
1412 | */ | |
3fb02738 | 1413 | result = acpi_add_single_object(&acpi_root, NULL, ACPI_ROOT_OBJECT, |
c4168bff | 1414 | ACPI_BUS_TYPE_SYSTEM, &ops); |
5b327265 PM |
1415 | if (result) |
1416 | goto Done; | |
1417 | ||
1da177e4 LT |
1418 | /* |
1419 | * Enumerate devices in the ACPI namespace. | |
1420 | */ | |
1421 | result = acpi_bus_scan_fixed(acpi_root); | |
c4168bff | 1422 | if (!result) |
3fb02738 | 1423 | result = acpi_bus_scan(acpi_root, &ops); |
1da177e4 LT |
1424 | |
1425 | if (result) | |
1426 | acpi_device_unregister(acpi_root, ACPI_BUS_REMOVAL_NORMAL); | |
1427 | ||
4be44fcd | 1428 | Done: |
d550d98d | 1429 | return result; |
1da177e4 LT |
1430 | } |
1431 | ||
1432 | subsys_initcall(acpi_scan_init); |