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 |
f52fd66d | 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" | |
1da177e4 LT |
20 | #define ACPI_BUS_DEVICE_NAME "System Bus" |
21 | ||
22 | static LIST_HEAD(acpi_device_list); | |
e49bd2dd | 23 | static LIST_HEAD(acpi_bus_id_list); |
1da177e4 LT |
24 | DEFINE_SPINLOCK(acpi_device_lock); |
25 | LIST_HEAD(acpi_wakeup_device_list); | |
26 | ||
e49bd2dd | 27 | struct acpi_device_bus_id{ |
bb095854 | 28 | char bus_id[15]; |
e49bd2dd ZR |
29 | unsigned int instance_no; |
30 | struct list_head node; | |
1da177e4 | 31 | }; |
4be44fcd | 32 | static int acpi_eject_operation(acpi_handle handle, int lockable) |
1da177e4 | 33 | { |
1da177e4 LT |
34 | struct acpi_object_list arg_list; |
35 | union acpi_object arg; | |
36 | acpi_status status = AE_OK; | |
1da177e4 | 37 | |
1da177e4 LT |
38 | /* |
39 | * TBD: evaluate _PS3? | |
40 | */ | |
1da177e4 | 41 | |
1da177e4 LT |
42 | if (lockable) { |
43 | arg_list.count = 1; | |
44 | arg_list.pointer = &arg; | |
45 | arg.type = ACPI_TYPE_INTEGER; | |
46 | arg.integer.value = 0; | |
47 | acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); | |
48 | } | |
1da177e4 | 49 | |
1da177e4 LT |
50 | arg_list.count = 1; |
51 | arg_list.pointer = &arg; | |
52 | arg.type = ACPI_TYPE_INTEGER; | |
53 | arg.integer.value = 1; | |
1da177e4 | 54 | |
1da177e4 LT |
55 | /* |
56 | * TBD: _EJD support. | |
57 | */ | |
1da177e4 | 58 | |
1da177e4 LT |
59 | status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); |
60 | if (ACPI_FAILURE(status)) { | |
4be44fcd | 61 | return (-ENODEV); |
1da177e4 | 62 | } |
1da177e4 | 63 | |
4be44fcd | 64 | return (0); |
1da177e4 LT |
65 | } |
66 | ||
1da177e4 | 67 | static ssize_t |
f883d9db PM |
68 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
69 | const char *buf, size_t count) | |
1da177e4 | 70 | { |
4be44fcd LB |
71 | int result; |
72 | int ret = count; | |
73 | int islockable; | |
74 | acpi_status status; | |
75 | acpi_handle handle; | |
76 | acpi_object_type type = 0; | |
f883d9db | 77 | struct acpi_device *acpi_device = to_acpi_device(d); |
1da177e4 | 78 | |
1da177e4 LT |
79 | if ((!count) || (buf[0] != '1')) { |
80 | return -EINVAL; | |
81 | } | |
1da177e4 | 82 | #ifndef FORCE_EJECT |
f883d9db | 83 | if (acpi_device->driver == NULL) { |
1da177e4 LT |
84 | ret = -ENODEV; |
85 | goto err; | |
86 | } | |
87 | #endif | |
f883d9db PM |
88 | status = acpi_get_type(acpi_device->handle, &type); |
89 | if (ACPI_FAILURE(status) || (!acpi_device->flags.ejectable)) { | |
1da177e4 LT |
90 | ret = -ENODEV; |
91 | goto err; | |
92 | } | |
1da177e4 | 93 | |
f883d9db PM |
94 | islockable = acpi_device->flags.lockable; |
95 | handle = acpi_device->handle; | |
9b6d97b6 | 96 | |
f883d9db | 97 | result = acpi_bus_trim(acpi_device, 1); |
1da177e4 | 98 | |
1da177e4 LT |
99 | if (!result) |
100 | result = acpi_eject_operation(handle, islockable); | |
1da177e4 | 101 | |
1da177e4 LT |
102 | if (result) { |
103 | ret = -EBUSY; | |
104 | } | |
4be44fcd | 105 | err: |
1da177e4 | 106 | return ret; |
1da177e4 LT |
107 | } |
108 | ||
f883d9db | 109 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
1da177e4 | 110 | |
e49bd2dd ZR |
111 | static ssize_t |
112 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
113 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1da177e4 | 114 | |
e49bd2dd | 115 | return sprintf(buf, "%s\n", acpi_dev->pnp.hardware_id); |
1da177e4 | 116 | } |
e49bd2dd | 117 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
1da177e4 | 118 | |
e49bd2dd ZR |
119 | static ssize_t |
120 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
121 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
122 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
123 | int result; | |
1da177e4 | 124 | |
e49bd2dd ZR |
125 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
126 | if(result) | |
127 | goto end; | |
1da177e4 | 128 | |
e49bd2dd ZR |
129 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
130 | kfree(path.pointer); | |
131 | end: | |
132 | return result; | |
1da177e4 | 133 | } |
e49bd2dd | 134 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
1da177e4 | 135 | |
e49bd2dd | 136 | static int acpi_device_setup_files(struct acpi_device *dev) |
1da177e4 | 137 | { |
f883d9db PM |
138 | acpi_status status; |
139 | acpi_handle temp; | |
e49bd2dd | 140 | int result = 0; |
1da177e4 LT |
141 | |
142 | /* | |
e49bd2dd | 143 | * Devices gotten from FADT don't have a "path" attribute |
1da177e4 | 144 | */ |
e49bd2dd ZR |
145 | if(dev->handle) { |
146 | result = device_create_file(&dev->dev, &dev_attr_path); | |
147 | if(result) | |
148 | goto end; | |
1da177e4 LT |
149 | } |
150 | ||
e49bd2dd ZR |
151 | if(dev->flags.hardware_id) { |
152 | result = device_create_file(&dev->dev, &dev_attr_hid); | |
153 | if(result) | |
154 | goto end; | |
155 | } | |
1da177e4 | 156 | |
e49bd2dd ZR |
157 | /* |
158 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
159 | * hot-removal function from userland. | |
160 | */ | |
f883d9db PM |
161 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); |
162 | if (ACPI_SUCCESS(status)) | |
e49bd2dd ZR |
163 | result = device_create_file(&dev->dev, &dev_attr_eject); |
164 | end: | |
165 | return result; | |
1da177e4 LT |
166 | } |
167 | ||
f883d9db | 168 | static void acpi_device_remove_files(struct acpi_device *dev) |
1da177e4 | 169 | { |
f883d9db PM |
170 | acpi_status status; |
171 | acpi_handle temp; | |
1da177e4 | 172 | |
f883d9db PM |
173 | /* |
174 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
175 | * hot-removal function from userland. | |
176 | */ | |
177 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); | |
178 | if (ACPI_SUCCESS(status)) | |
179 | device_remove_file(&dev->dev, &dev_attr_eject); | |
1da177e4 | 180 | |
e49bd2dd ZR |
181 | if(dev->flags.hardware_id) |
182 | device_remove_file(&dev->dev, &dev_attr_hid); | |
183 | if(dev->handle) | |
184 | device_remove_file(&dev->dev, &dev_attr_path); | |
1da177e4 | 185 | } |
1da177e4 | 186 | /* -------------------------------------------------------------------------- |
9e89dde2 | 187 | ACPI Bus operations |
1da177e4 | 188 | -------------------------------------------------------------------------- */ |
1890a97a | 189 | static void acpi_device_release(struct device *dev) |
1da177e4 | 190 | { |
1890a97a | 191 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 192 | |
1890a97a PM |
193 | kfree(acpi_dev->pnp.cid_list); |
194 | kfree(acpi_dev); | |
1da177e4 LT |
195 | } |
196 | ||
5d9464a4 | 197 | static int acpi_device_suspend(struct device *dev, pm_message_t state) |
1da177e4 | 198 | { |
5d9464a4 PM |
199 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
200 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
1da177e4 | 201 | |
5d9464a4 PM |
202 | if (acpi_drv && acpi_drv->ops.suspend) |
203 | return acpi_drv->ops.suspend(acpi_dev, state); | |
1da177e4 LT |
204 | return 0; |
205 | } | |
1da177e4 | 206 | |
5d9464a4 | 207 | static int acpi_device_resume(struct device *dev) |
9e89dde2 | 208 | { |
5d9464a4 PM |
209 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
210 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
1da177e4 | 211 | |
5d9464a4 PM |
212 | if (acpi_drv && acpi_drv->ops.resume) |
213 | return acpi_drv->ops.resume(acpi_dev); | |
d550d98d | 214 | return 0; |
1da177e4 LT |
215 | } |
216 | ||
5d9464a4 | 217 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 218 | { |
5d9464a4 PM |
219 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
220 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
1da177e4 | 221 | |
5d9464a4 PM |
222 | return !acpi_match_ids(acpi_dev, acpi_drv->ids); |
223 | } | |
1da177e4 | 224 | |
5d9464a4 PM |
225 | static int acpi_device_uevent(struct device *dev, char **envp, int num_envp, |
226 | char *buffer, int buffer_size) | |
1da177e4 | 227 | { |
5d9464a4 PM |
228 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
229 | int i = 0, length = 0, ret = 0; | |
230 | ||
231 | if (acpi_dev->flags.hardware_id) | |
232 | ret = add_uevent_var(envp, num_envp, &i, | |
233 | buffer, buffer_size, &length, | |
234 | "HWID=%s", acpi_dev->pnp.hardware_id); | |
235 | if (ret) | |
236 | return -ENOMEM; | |
237 | if (acpi_dev->flags.compatible_ids) { | |
238 | int j; | |
239 | struct acpi_compatible_id_list *cid_list; | |
240 | ||
241 | cid_list = acpi_dev->pnp.cid_list; | |
242 | ||
243 | for (j = 0; j < cid_list->count; j++) { | |
244 | ret = add_uevent_var(envp, num_envp, &i, buffer, | |
245 | buffer_size, &length, "COMPTID=%s", | |
246 | cid_list->id[j].value); | |
247 | if (ret) | |
248 | return -ENOMEM; | |
9e89dde2 ZR |
249 | } |
250 | } | |
5d9464a4 PM |
251 | |
252 | envp[i] = NULL; | |
9e89dde2 | 253 | return 0; |
1da177e4 LT |
254 | } |
255 | ||
5d9464a4 PM |
256 | static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *); |
257 | static int acpi_start_single_object(struct acpi_device *); | |
258 | static int acpi_device_probe(struct device * dev) | |
1da177e4 | 259 | { |
5d9464a4 PM |
260 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
261 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
262 | int ret; | |
263 | ||
264 | ret = acpi_bus_driver_init(acpi_dev, acpi_drv); | |
265 | if (!ret) { | |
c4168bff LS |
266 | if (acpi_dev->bus_ops.acpi_op_start) |
267 | acpi_start_single_object(acpi_dev); | |
5d9464a4 PM |
268 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
269 | "Found driver [%s] for device [%s]\n", | |
270 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
271 | get_device(dev); | |
272 | } | |
273 | return ret; | |
274 | } | |
1da177e4 | 275 | |
5d9464a4 PM |
276 | static int acpi_device_remove(struct device * dev) |
277 | { | |
278 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
279 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
280 | ||
281 | if (acpi_drv) { | |
282 | if (acpi_drv->ops.stop) | |
96333578 | 283 | acpi_drv->ops.stop(acpi_dev, acpi_dev->removal_type); |
5d9464a4 | 284 | if (acpi_drv->ops.remove) |
96333578 | 285 | acpi_drv->ops.remove(acpi_dev, acpi_dev->removal_type); |
1da177e4 | 286 | } |
5d9464a4 PM |
287 | acpi_dev->driver = NULL; |
288 | acpi_driver_data(dev) = NULL; | |
1da177e4 | 289 | |
5d9464a4 | 290 | put_device(dev); |
9e89dde2 ZR |
291 | return 0; |
292 | } | |
1da177e4 | 293 | |
5d9464a4 | 294 | static void acpi_device_shutdown(struct device *dev) |
1da177e4 | 295 | { |
5d9464a4 PM |
296 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
297 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
1da177e4 | 298 | |
5d9464a4 PM |
299 | if (acpi_drv && acpi_drv->ops.shutdown) |
300 | acpi_drv->ops.shutdown(acpi_dev); | |
1da177e4 | 301 | |
5d9464a4 | 302 | return ; |
1da177e4 LT |
303 | } |
304 | ||
55955aad | 305 | struct bus_type acpi_bus_type = { |
9e89dde2 ZR |
306 | .name = "acpi", |
307 | .suspend = acpi_device_suspend, | |
308 | .resume = acpi_device_resume, | |
5d9464a4 PM |
309 | .shutdown = acpi_device_shutdown, |
310 | .match = acpi_bus_match, | |
311 | .probe = acpi_device_probe, | |
312 | .remove = acpi_device_remove, | |
313 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
314 | }; |
315 | ||
e49bd2dd | 316 | static int acpi_device_register(struct acpi_device *device, |
9e89dde2 | 317 | struct acpi_device *parent) |
1da177e4 | 318 | { |
4be44fcd | 319 | int result; |
e49bd2dd ZR |
320 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
321 | int found = 0; | |
9e89dde2 ZR |
322 | /* |
323 | * Linkage | |
324 | * ------- | |
325 | * Link this device to its parent and siblings. | |
326 | */ | |
327 | INIT_LIST_HEAD(&device->children); | |
328 | INIT_LIST_HEAD(&device->node); | |
329 | INIT_LIST_HEAD(&device->g_list); | |
330 | INIT_LIST_HEAD(&device->wakeup_list); | |
1da177e4 | 331 | |
e49bd2dd ZR |
332 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
333 | if (!new_bus_id) { | |
334 | printk(KERN_ERR PREFIX "Memory allocation error\n"); | |
335 | return -ENOMEM; | |
1da177e4 | 336 | } |
e49bd2dd | 337 | |
9e89dde2 | 338 | spin_lock(&acpi_device_lock); |
e49bd2dd ZR |
339 | /* |
340 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
341 | * If failed, create one and link it into acpi_bus_id_list | |
342 | */ | |
343 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
bb095854 | 344 | if(!strcmp(acpi_device_bus_id->bus_id, device->flags.hardware_id? device->pnp.hardware_id : "device")) { |
e49bd2dd ZR |
345 | acpi_device_bus_id->instance_no ++; |
346 | found = 1; | |
347 | kfree(new_bus_id); | |
348 | break; | |
349 | } | |
1da177e4 | 350 | } |
e49bd2dd ZR |
351 | if(!found) { |
352 | acpi_device_bus_id = new_bus_id; | |
bb095854 | 353 | strcpy(acpi_device_bus_id->bus_id, device->flags.hardware_id ? device->pnp.hardware_id : "device"); |
e49bd2dd ZR |
354 | acpi_device_bus_id->instance_no = 0; |
355 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 356 | } |
e49bd2dd | 357 | sprintf(device->dev.bus_id, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 358 | |
9e89dde2 ZR |
359 | if (device->parent) { |
360 | list_add_tail(&device->node, &device->parent->children); | |
361 | list_add_tail(&device->g_list, &device->parent->g_list); | |
362 | } else | |
363 | list_add_tail(&device->g_list, &acpi_device_list); | |
364 | if (device->wakeup.flags.valid) | |
365 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
366 | spin_unlock(&acpi_device_lock); | |
1da177e4 | 367 | |
1890a97a PM |
368 | if (device->parent) |
369 | device->dev.parent = &parent->dev; | |
370 | device->dev.bus = &acpi_bus_type; | |
371 | device_initialize(&device->dev); | |
1890a97a | 372 | device->dev.release = &acpi_device_release; |
e49bd2dd ZR |
373 | result = device_add(&device->dev); |
374 | if(result) { | |
375 | printk("Error adding device %s", device->dev.bus_id); | |
376 | goto end; | |
1da177e4 | 377 | } |
1da177e4 | 378 | |
e49bd2dd ZR |
379 | result = acpi_device_setup_files(device); |
380 | if(result) | |
381 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error creating sysfs interface for device %s\n", device->dev.bus_id)); | |
1da177e4 | 382 | |
96333578 | 383 | device->removal_type = ACPI_BUS_REMOVAL_NORMAL; |
1da177e4 | 384 | return 0; |
e49bd2dd ZR |
385 | end: |
386 | spin_lock(&acpi_device_lock); | |
387 | if (device->parent) { | |
388 | list_del(&device->node); | |
389 | list_del(&device->g_list); | |
390 | } else | |
391 | list_del(&device->g_list); | |
392 | list_del(&device->wakeup_list); | |
393 | spin_unlock(&acpi_device_lock); | |
394 | return result; | |
1da177e4 LT |
395 | } |
396 | ||
9e89dde2 ZR |
397 | static void acpi_device_unregister(struct acpi_device *device, int type) |
398 | { | |
399 | spin_lock(&acpi_device_lock); | |
400 | if (device->parent) { | |
401 | list_del(&device->node); | |
402 | list_del(&device->g_list); | |
403 | } else | |
404 | list_del(&device->g_list); | |
1da177e4 | 405 | |
9e89dde2 | 406 | list_del(&device->wakeup_list); |
9e89dde2 | 407 | spin_unlock(&acpi_device_lock); |
1da177e4 | 408 | |
9e89dde2 | 409 | acpi_detach_data(device->handle, acpi_bus_data_handler); |
1890a97a | 410 | |
f883d9db | 411 | acpi_device_remove_files(device); |
1890a97a | 412 | device_unregister(&device->dev); |
1da177e4 LT |
413 | } |
414 | ||
9e89dde2 ZR |
415 | /* -------------------------------------------------------------------------- |
416 | Driver Management | |
417 | -------------------------------------------------------------------------- */ | |
1da177e4 | 418 | /** |
d758a8fa RD |
419 | * acpi_bus_driver_init - add a device to a driver |
420 | * @device: the device to add and initialize | |
421 | * @driver: driver for the device | |
422 | * | |
1da177e4 | 423 | * Used to initialize a device via its device driver. Called whenever a |
1890a97a | 424 | * driver is bound to a device. Invokes the driver's add() ops. |
1da177e4 LT |
425 | */ |
426 | static int | |
4be44fcd | 427 | acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) |
1da177e4 | 428 | { |
4be44fcd | 429 | int result = 0; |
1da177e4 | 430 | |
1da177e4 LT |
431 | |
432 | if (!device || !driver) | |
d550d98d | 433 | return -EINVAL; |
1da177e4 LT |
434 | |
435 | if (!driver->ops.add) | |
d550d98d | 436 | return -ENOSYS; |
1da177e4 LT |
437 | |
438 | result = driver->ops.add(device); | |
439 | if (result) { | |
440 | device->driver = NULL; | |
441 | acpi_driver_data(device) = NULL; | |
d550d98d | 442 | return result; |
1da177e4 LT |
443 | } |
444 | ||
445 | device->driver = driver; | |
446 | ||
447 | /* | |
448 | * TBD - Configuration Management: Assign resources to device based | |
449 | * upon possible configuration and currently allocated resources. | |
450 | */ | |
451 | ||
4be44fcd LB |
452 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
453 | "Driver successfully bound to device\n")); | |
d550d98d | 454 | return 0; |
3fb02738 RS |
455 | } |
456 | ||
8713cbef | 457 | static int acpi_start_single_object(struct acpi_device *device) |
3fb02738 RS |
458 | { |
459 | int result = 0; | |
460 | struct acpi_driver *driver; | |
461 | ||
3fb02738 RS |
462 | |
463 | if (!(driver = device->driver)) | |
d550d98d | 464 | return 0; |
3fb02738 | 465 | |
1da177e4 LT |
466 | if (driver->ops.start) { |
467 | result = driver->ops.start(device); | |
468 | if (result && driver->ops.remove) | |
469 | driver->ops.remove(device, ACPI_BUS_REMOVAL_NORMAL); | |
1da177e4 LT |
470 | } |
471 | ||
d550d98d | 472 | return result; |
1da177e4 LT |
473 | } |
474 | ||
9e89dde2 ZR |
475 | /** |
476 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
477 | * @driver: driver being registered | |
478 | * | |
479 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
480 | * devices that match the driver's criteria and binds. Returns zero for | |
481 | * success or a negative error status for failure. | |
482 | */ | |
483 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
1da177e4 | 484 | { |
1890a97a | 485 | int ret; |
1da177e4 | 486 | |
9e89dde2 ZR |
487 | if (acpi_disabled) |
488 | return -ENODEV; | |
1890a97a PM |
489 | driver->drv.name = driver->name; |
490 | driver->drv.bus = &acpi_bus_type; | |
491 | driver->drv.owner = driver->owner; | |
1da177e4 | 492 | |
1890a97a PM |
493 | ret = driver_register(&driver->drv); |
494 | return ret; | |
9e89dde2 | 495 | } |
1da177e4 | 496 | |
9e89dde2 ZR |
497 | EXPORT_SYMBOL(acpi_bus_register_driver); |
498 | ||
499 | /** | |
500 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus | |
501 | * @driver: driver to unregister | |
502 | * | |
503 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
504 | * devices that match the driver's criteria and unbinds. | |
505 | */ | |
506 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
507 | { | |
1890a97a | 508 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
509 | } |
510 | ||
511 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
512 | ||
9e89dde2 ZR |
513 | /* -------------------------------------------------------------------------- |
514 | Device Enumeration | |
515 | -------------------------------------------------------------------------- */ | |
516 | acpi_status | |
517 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
518 | { | |
519 | acpi_status status; | |
520 | acpi_handle tmp; | |
521 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
522 | union acpi_object *obj; | |
523 | ||
524 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
525 | if (ACPI_FAILURE(status)) | |
526 | return status; | |
527 | ||
528 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
529 | if (ACPI_SUCCESS(status)) { | |
530 | obj = buffer.pointer; | |
531 | status = acpi_get_handle(NULL, obj->string.pointer, ejd); | |
532 | kfree(buffer.pointer); | |
533 | } | |
534 | return status; | |
535 | } | |
536 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
537 | ||
538 | void acpi_bus_data_handler(acpi_handle handle, u32 function, void *context) | |
539 | { | |
540 | ||
541 | /* TBD */ | |
542 | ||
543 | return; | |
544 | } | |
545 | ||
546 | int acpi_match_ids(struct acpi_device *device, char *ids) | |
547 | { | |
548 | if (device->flags.hardware_id) | |
549 | if (strstr(ids, device->pnp.hardware_id)) | |
550 | return 0; | |
551 | ||
552 | if (device->flags.compatible_ids) { | |
553 | struct acpi_compatible_id_list *cid_list = device->pnp.cid_list; | |
554 | int i; | |
555 | ||
556 | /* compare multiple _CID entries against driver ids */ | |
557 | for (i = 0; i < cid_list->count; i++) { | |
558 | if (strstr(ids, cid_list->id[i].value)) | |
559 | return 0; | |
560 | } | |
561 | } | |
562 | return -ENOENT; | |
563 | } | |
564 | ||
565 | static int acpi_bus_get_perf_flags(struct acpi_device *device) | |
566 | { | |
567 | device->performance.state = ACPI_STATE_UNKNOWN; | |
568 | return 0; | |
569 | } | |
570 | ||
571 | static acpi_status | |
572 | acpi_bus_extract_wakeup_device_power_package(struct acpi_device *device, | |
573 | union acpi_object *package) | |
574 | { | |
575 | int i = 0; | |
576 | union acpi_object *element = NULL; | |
577 | ||
578 | if (!device || !package || (package->package.count < 2)) | |
579 | return AE_BAD_PARAMETER; | |
580 | ||
581 | element = &(package->package.elements[0]); | |
582 | if (!element) | |
583 | return AE_BAD_PARAMETER; | |
584 | if (element->type == ACPI_TYPE_PACKAGE) { | |
585 | if ((element->package.count < 2) || | |
586 | (element->package.elements[0].type != | |
587 | ACPI_TYPE_LOCAL_REFERENCE) | |
588 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) | |
589 | return AE_BAD_DATA; | |
590 | device->wakeup.gpe_device = | |
591 | element->package.elements[0].reference.handle; | |
592 | device->wakeup.gpe_number = | |
593 | (u32) element->package.elements[1].integer.value; | |
594 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
595 | device->wakeup.gpe_number = element->integer.value; | |
596 | } else | |
597 | return AE_BAD_DATA; | |
598 | ||
599 | element = &(package->package.elements[1]); | |
600 | if (element->type != ACPI_TYPE_INTEGER) { | |
601 | return AE_BAD_DATA; | |
602 | } | |
603 | device->wakeup.sleep_state = element->integer.value; | |
604 | ||
605 | if ((package->package.count - 2) > ACPI_MAX_HANDLES) { | |
606 | return AE_NO_MEMORY; | |
607 | } | |
608 | device->wakeup.resources.count = package->package.count - 2; | |
609 | for (i = 0; i < device->wakeup.resources.count; i++) { | |
610 | element = &(package->package.elements[i + 2]); | |
611 | if (element->type != ACPI_TYPE_ANY) { | |
612 | return AE_BAD_DATA; | |
1da177e4 | 613 | } |
9e89dde2 ZR |
614 | |
615 | device->wakeup.resources.handles[i] = element->reference.handle; | |
1da177e4 | 616 | } |
9e89dde2 ZR |
617 | |
618 | return AE_OK; | |
1da177e4 LT |
619 | } |
620 | ||
9e89dde2 | 621 | static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
1da177e4 | 622 | { |
9e89dde2 ZR |
623 | acpi_status status = 0; |
624 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
625 | union acpi_object *package = NULL; | |
1da177e4 | 626 | |
1da177e4 | 627 | |
9e89dde2 ZR |
628 | /* _PRW */ |
629 | status = acpi_evaluate_object(device->handle, "_PRW", NULL, &buffer); | |
630 | if (ACPI_FAILURE(status)) { | |
631 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
632 | goto end; | |
1da177e4 | 633 | } |
1da177e4 | 634 | |
9e89dde2 ZR |
635 | package = (union acpi_object *)buffer.pointer; |
636 | status = acpi_bus_extract_wakeup_device_power_package(device, package); | |
637 | if (ACPI_FAILURE(status)) { | |
638 | ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package")); | |
639 | goto end; | |
640 | } | |
1da177e4 | 641 | |
9e89dde2 | 642 | kfree(buffer.pointer); |
1da177e4 | 643 | |
9e89dde2 ZR |
644 | device->wakeup.flags.valid = 1; |
645 | /* Power button, Lid switch always enable wakeup */ | |
646 | if (!acpi_match_ids(device, "PNP0C0D,PNP0C0C,PNP0C0E")) | |
647 | device->wakeup.flags.run_wake = 1; | |
1da177e4 | 648 | |
9e89dde2 ZR |
649 | end: |
650 | if (ACPI_FAILURE(status)) | |
651 | device->flags.wake_capable = 0; | |
d550d98d | 652 | return 0; |
1da177e4 | 653 | } |
1da177e4 | 654 | |
9e89dde2 | 655 | static int acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 656 | { |
9e89dde2 ZR |
657 | acpi_status status = 0; |
658 | acpi_handle handle = NULL; | |
659 | u32 i = 0; | |
1a365616 | 660 | |
4be44fcd | 661 | |
9e89dde2 ZR |
662 | /* |
663 | * Power Management Flags | |
664 | */ | |
665 | status = acpi_get_handle(device->handle, "_PSC", &handle); | |
666 | if (ACPI_SUCCESS(status)) | |
667 | device->power.flags.explicit_get = 1; | |
668 | status = acpi_get_handle(device->handle, "_IRC", &handle); | |
669 | if (ACPI_SUCCESS(status)) | |
670 | device->power.flags.inrush_current = 1; | |
1da177e4 | 671 | |
9e89dde2 ZR |
672 | /* |
673 | * Enumerate supported power management states | |
674 | */ | |
675 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3; i++) { | |
676 | struct acpi_device_power_state *ps = &device->power.states[i]; | |
677 | char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' }; | |
1da177e4 | 678 | |
9e89dde2 ZR |
679 | /* Evaluate "_PRx" to se if power resources are referenced */ |
680 | acpi_evaluate_reference(device->handle, object_name, NULL, | |
681 | &ps->resources); | |
682 | if (ps->resources.count) { | |
683 | device->power.flags.power_resources = 1; | |
684 | ps->flags.valid = 1; | |
1da177e4 | 685 | } |
1da177e4 | 686 | |
9e89dde2 ZR |
687 | /* Evaluate "_PSx" to see if we can do explicit sets */ |
688 | object_name[2] = 'S'; | |
689 | status = acpi_get_handle(device->handle, object_name, &handle); | |
690 | if (ACPI_SUCCESS(status)) { | |
691 | ps->flags.explicit_set = 1; | |
692 | ps->flags.valid = 1; | |
1da177e4 | 693 | } |
1da177e4 | 694 | |
9e89dde2 ZR |
695 | /* State is valid if we have some power control */ |
696 | if (ps->resources.count || ps->flags.explicit_set) | |
697 | ps->flags.valid = 1; | |
1da177e4 | 698 | |
9e89dde2 ZR |
699 | ps->power = -1; /* Unknown - driver assigned */ |
700 | ps->latency = -1; /* Unknown - driver assigned */ | |
701 | } | |
1da177e4 | 702 | |
9e89dde2 ZR |
703 | /* Set defaults for D0 and D3 states (always valid) */ |
704 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
705 | device->power.states[ACPI_STATE_D0].power = 100; | |
706 | device->power.states[ACPI_STATE_D3].flags.valid = 1; | |
707 | device->power.states[ACPI_STATE_D3].power = 0; | |
c8f7a62c | 708 | |
9e89dde2 | 709 | /* TBD: System wake support and resource requirements. */ |
c8f7a62c | 710 | |
9e89dde2 | 711 | device->power.state = ACPI_STATE_UNKNOWN; |
c8f7a62c | 712 | |
9e89dde2 ZR |
713 | return 0; |
714 | } | |
c8f7a62c | 715 | |
4be44fcd | 716 | static int acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 717 | { |
4be44fcd LB |
718 | acpi_status status = AE_OK; |
719 | acpi_handle temp = NULL; | |
1da177e4 | 720 | |
1da177e4 LT |
721 | |
722 | /* Presence of _STA indicates 'dynamic_status' */ | |
723 | status = acpi_get_handle(device->handle, "_STA", &temp); | |
724 | if (ACPI_SUCCESS(status)) | |
725 | device->flags.dynamic_status = 1; | |
726 | ||
727 | /* Presence of _CID indicates 'compatible_ids' */ | |
728 | status = acpi_get_handle(device->handle, "_CID", &temp); | |
729 | if (ACPI_SUCCESS(status)) | |
730 | device->flags.compatible_ids = 1; | |
731 | ||
732 | /* Presence of _RMV indicates 'removable' */ | |
733 | status = acpi_get_handle(device->handle, "_RMV", &temp); | |
734 | if (ACPI_SUCCESS(status)) | |
735 | device->flags.removable = 1; | |
736 | ||
737 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
738 | status = acpi_get_handle(device->handle, "_EJD", &temp); | |
739 | if (ACPI_SUCCESS(status)) | |
740 | device->flags.ejectable = 1; | |
741 | else { | |
742 | status = acpi_get_handle(device->handle, "_EJ0", &temp); | |
743 | if (ACPI_SUCCESS(status)) | |
744 | device->flags.ejectable = 1; | |
745 | } | |
746 | ||
747 | /* Presence of _LCK indicates 'lockable' */ | |
748 | status = acpi_get_handle(device->handle, "_LCK", &temp); | |
749 | if (ACPI_SUCCESS(status)) | |
750 | device->flags.lockable = 1; | |
751 | ||
752 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ | |
753 | status = acpi_get_handle(device->handle, "_PS0", &temp); | |
754 | if (ACPI_FAILURE(status)) | |
755 | status = acpi_get_handle(device->handle, "_PR0", &temp); | |
756 | if (ACPI_SUCCESS(status)) | |
757 | device->flags.power_manageable = 1; | |
758 | ||
759 | /* Presence of _PRW indicates wake capable */ | |
760 | status = acpi_get_handle(device->handle, "_PRW", &temp); | |
761 | if (ACPI_SUCCESS(status)) | |
762 | device->flags.wake_capable = 1; | |
763 | ||
764 | /* TBD: Peformance management */ | |
765 | ||
d550d98d | 766 | return 0; |
1da177e4 LT |
767 | } |
768 | ||
4be44fcd LB |
769 | static void acpi_device_get_busid(struct acpi_device *device, |
770 | acpi_handle handle, int type) | |
1da177e4 | 771 | { |
4be44fcd LB |
772 | char bus_id[5] = { '?', 0 }; |
773 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
774 | int i = 0; | |
1da177e4 LT |
775 | |
776 | /* | |
777 | * Bus ID | |
778 | * ------ | |
779 | * The device's Bus ID is simply the object name. | |
780 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
781 | */ | |
782 | switch (type) { | |
783 | case ACPI_BUS_TYPE_SYSTEM: | |
784 | strcpy(device->pnp.bus_id, "ACPI"); | |
785 | break; | |
786 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
787 | strcpy(device->pnp.bus_id, "PWRF"); | |
788 | break; | |
789 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
790 | strcpy(device->pnp.bus_id, "SLPF"); | |
791 | break; | |
792 | default: | |
793 | acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer); | |
794 | /* Clean up trailing underscores (if any) */ | |
795 | for (i = 3; i > 1; i--) { | |
796 | if (bus_id[i] == '_') | |
797 | bus_id[i] = '\0'; | |
798 | else | |
799 | break; | |
800 | } | |
801 | strcpy(device->pnp.bus_id, bus_id); | |
802 | break; | |
803 | } | |
804 | } | |
805 | ||
ae843332 ZR |
806 | static int |
807 | acpi_video_bus_match(struct acpi_device *device) | |
808 | { | |
809 | acpi_handle h_dummy1; | |
810 | acpi_handle h_dummy2; | |
811 | acpi_handle h_dummy3; | |
812 | ||
813 | ||
814 | if (!device) | |
815 | return -EINVAL; | |
816 | ||
817 | /* Since there is no HID, CID for ACPI Video drivers, we have | |
818 | * to check well known required nodes for each feature we support. | |
819 | */ | |
820 | ||
821 | /* Does this device able to support video switching ? */ | |
822 | if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOD", &h_dummy1)) && | |
823 | ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOS", &h_dummy2))) | |
824 | return 0; | |
825 | ||
826 | /* Does this device able to retrieve a video ROM ? */ | |
827 | if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_ROM", &h_dummy1))) | |
828 | return 0; | |
829 | ||
830 | /* Does this device able to configure which video head to be POSTed ? */ | |
831 | if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_VPO", &h_dummy1)) && | |
832 | ACPI_SUCCESS(acpi_get_handle(device->handle, "_GPD", &h_dummy2)) && | |
833 | ACPI_SUCCESS(acpi_get_handle(device->handle, "_SPD", &h_dummy3))) | |
834 | return 0; | |
835 | ||
836 | return -ENODEV; | |
837 | } | |
838 | ||
54735266 ZR |
839 | /* |
840 | * acpi_bay_match - see if a device is an ejectable driver bay | |
841 | * | |
842 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
843 | * then we can safely call it an ejectable drive bay | |
844 | */ | |
845 | static int acpi_bay_match(struct acpi_device *device){ | |
846 | acpi_status status; | |
847 | acpi_handle handle; | |
848 | acpi_handle tmp; | |
849 | acpi_handle phandle; | |
850 | ||
851 | handle = device->handle; | |
852 | ||
853 | status = acpi_get_handle(handle, "_EJ0", &tmp); | |
854 | if (ACPI_FAILURE(status)) | |
855 | return -ENODEV; | |
856 | ||
857 | if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || | |
858 | (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || | |
859 | (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || | |
860 | (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) | |
861 | return 0; | |
862 | ||
863 | if (acpi_get_parent(handle, &phandle)) | |
864 | return -ENODEV; | |
865 | ||
866 | if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) || | |
867 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) || | |
868 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) || | |
869 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp)))) | |
870 | return 0; | |
871 | ||
872 | return -ENODEV; | |
873 | } | |
874 | ||
4be44fcd LB |
875 | static void acpi_device_set_id(struct acpi_device *device, |
876 | struct acpi_device *parent, acpi_handle handle, | |
877 | int type) | |
1da177e4 | 878 | { |
4be44fcd LB |
879 | struct acpi_device_info *info; |
880 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
881 | char *hid = NULL; | |
882 | char *uid = NULL; | |
1da177e4 | 883 | struct acpi_compatible_id_list *cid_list = NULL; |
4be44fcd | 884 | acpi_status status; |
1da177e4 LT |
885 | |
886 | switch (type) { | |
887 | case ACPI_BUS_TYPE_DEVICE: | |
888 | status = acpi_get_object_info(handle, &buffer); | |
889 | if (ACPI_FAILURE(status)) { | |
4be44fcd | 890 | printk("%s: Error reading device info\n", __FUNCTION__); |
1da177e4 LT |
891 | return; |
892 | } | |
893 | ||
894 | info = buffer.pointer; | |
895 | if (info->valid & ACPI_VALID_HID) | |
896 | hid = info->hardware_id.value; | |
897 | if (info->valid & ACPI_VALID_UID) | |
898 | uid = info->unique_id.value; | |
899 | if (info->valid & ACPI_VALID_CID) | |
900 | cid_list = &info->compatibility_id; | |
901 | if (info->valid & ACPI_VALID_ADR) { | |
902 | device->pnp.bus_address = info->address; | |
903 | device->flags.bus_address = 1; | |
904 | } | |
ae843332 ZR |
905 | |
906 | if(!(info->valid & (ACPI_VALID_HID | ACPI_VALID_CID))){ | |
907 | status = acpi_video_bus_match(device); | |
908 | if(ACPI_SUCCESS(status)) | |
909 | hid = ACPI_VIDEO_HID; | |
54735266 ZR |
910 | |
911 | status = acpi_bay_match(device); | |
912 | if (ACPI_SUCCESS(status)) | |
913 | hid = ACPI_BAY_HID; | |
ae843332 | 914 | } |
1da177e4 LT |
915 | break; |
916 | case ACPI_BUS_TYPE_POWER: | |
917 | hid = ACPI_POWER_HID; | |
918 | break; | |
919 | case ACPI_BUS_TYPE_PROCESSOR: | |
920 | hid = ACPI_PROCESSOR_HID; | |
921 | break; | |
922 | case ACPI_BUS_TYPE_SYSTEM: | |
923 | hid = ACPI_SYSTEM_HID; | |
924 | break; | |
925 | case ACPI_BUS_TYPE_THERMAL: | |
926 | hid = ACPI_THERMAL_HID; | |
927 | break; | |
928 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
929 | hid = ACPI_BUTTON_HID_POWERF; | |
930 | break; | |
931 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
932 | hid = ACPI_BUTTON_HID_SLEEPF; | |
933 | break; | |
934 | } | |
935 | ||
936 | /* | |
937 | * \_SB | |
938 | * ---- | |
939 | * Fix for the system root bus device -- the only root-level device. | |
940 | */ | |
c51a4de8 | 941 | if (((acpi_handle)parent == ACPI_ROOT_OBJECT) && (type == ACPI_BUS_TYPE_DEVICE)) { |
1da177e4 LT |
942 | hid = ACPI_BUS_HID; |
943 | strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME); | |
944 | strcpy(device->pnp.device_class, ACPI_BUS_CLASS); | |
945 | } | |
946 | ||
947 | if (hid) { | |
948 | strcpy(device->pnp.hardware_id, hid); | |
949 | device->flags.hardware_id = 1; | |
950 | } | |
951 | if (uid) { | |
952 | strcpy(device->pnp.unique_id, uid); | |
953 | device->flags.unique_id = 1; | |
954 | } | |
955 | if (cid_list) { | |
956 | device->pnp.cid_list = kmalloc(cid_list->size, GFP_KERNEL); | |
957 | if (device->pnp.cid_list) | |
958 | memcpy(device->pnp.cid_list, cid_list, cid_list->size); | |
959 | else | |
960 | printk(KERN_ERR "Memory allocation error\n"); | |
961 | } | |
962 | ||
02438d87 | 963 | kfree(buffer.pointer); |
1da177e4 LT |
964 | } |
965 | ||
4be44fcd | 966 | static int acpi_device_set_context(struct acpi_device *device, int type) |
1da177e4 LT |
967 | { |
968 | acpi_status status = AE_OK; | |
969 | int result = 0; | |
970 | /* | |
971 | * Context | |
972 | * ------- | |
973 | * Attach this 'struct acpi_device' to the ACPI object. This makes | |
974 | * resolutions from handle->device very efficient. Note that we need | |
975 | * to be careful with fixed-feature devices as they all attach to the | |
976 | * root object. | |
977 | */ | |
4be44fcd | 978 | if (type != ACPI_BUS_TYPE_POWER_BUTTON && |
1da177e4 LT |
979 | type != ACPI_BUS_TYPE_SLEEP_BUTTON) { |
980 | status = acpi_attach_data(device->handle, | |
4be44fcd | 981 | acpi_bus_data_handler, device); |
1da177e4 LT |
982 | |
983 | if (ACPI_FAILURE(status)) { | |
984 | printk("Error attaching device data\n"); | |
985 | result = -ENODEV; | |
986 | } | |
987 | } | |
988 | return result; | |
989 | } | |
990 | ||
4be44fcd | 991 | static int acpi_bus_remove(struct acpi_device *dev, int rmdevice) |
1da177e4 | 992 | { |
1da177e4 | 993 | if (!dev) |
d550d98d | 994 | return -EINVAL; |
1da177e4 | 995 | |
96333578 | 996 | dev->removal_type = ACPI_BUS_REMOVAL_EJECT; |
1890a97a | 997 | device_release_driver(&dev->dev); |
1da177e4 LT |
998 | |
999 | if (!rmdevice) | |
d550d98d | 1000 | return 0; |
1da177e4 | 1001 | |
2786f6e3 RZ |
1002 | /* |
1003 | * unbind _ADR-Based Devices when hot removal | |
1004 | */ | |
1da177e4 LT |
1005 | if (dev->flags.bus_address) { |
1006 | if ((dev->parent) && (dev->parent->ops.unbind)) | |
1007 | dev->parent->ops.unbind(dev); | |
1008 | } | |
1da177e4 LT |
1009 | acpi_device_unregister(dev, ACPI_BUS_REMOVAL_EJECT); |
1010 | ||
d550d98d | 1011 | return 0; |
1da177e4 LT |
1012 | } |
1013 | ||
3fb02738 | 1014 | static int |
4be44fcd | 1015 | acpi_add_single_object(struct acpi_device **child, |
c4168bff LS |
1016 | struct acpi_device *parent, acpi_handle handle, int type, |
1017 | struct acpi_bus_ops *ops) | |
1da177e4 | 1018 | { |
4be44fcd LB |
1019 | int result = 0; |
1020 | struct acpi_device *device = NULL; | |
1da177e4 | 1021 | |
1da177e4 LT |
1022 | |
1023 | if (!child) | |
d550d98d | 1024 | return -EINVAL; |
1da177e4 | 1025 | |
36bcbec7 | 1026 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 1027 | if (!device) { |
6468463a | 1028 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 1029 | return -ENOMEM; |
1da177e4 | 1030 | } |
1da177e4 LT |
1031 | |
1032 | device->handle = handle; | |
1033 | device->parent = parent; | |
c4168bff LS |
1034 | device->bus_ops = *ops; /* workround for not call .start */ |
1035 | ||
1da177e4 | 1036 | |
4be44fcd | 1037 | acpi_device_get_busid(device, handle, type); |
1da177e4 LT |
1038 | |
1039 | /* | |
1040 | * Flags | |
1041 | * ----- | |
1042 | * Get prior to calling acpi_bus_get_status() so we know whether | |
1043 | * or not _STA is present. Note that we only look for object | |
1044 | * handles -- cannot evaluate objects until we know the device is | |
1045 | * present and properly initialized. | |
1046 | */ | |
1047 | result = acpi_bus_get_flags(device); | |
1048 | if (result) | |
1049 | goto end; | |
1050 | ||
1051 | /* | |
1052 | * Status | |
1053 | * ------ | |
6940faba KT |
1054 | * See if the device is present. We always assume that non-Device |
1055 | * and non-Processor objects (e.g. thermal zones, power resources, | |
1056 | * etc.) are present, functioning, etc. (at least when parent object | |
1057 | * is present). Note that _STA has a different meaning for some | |
1058 | * objects (e.g. power resources) so we need to be careful how we use | |
1059 | * it. | |
1da177e4 LT |
1060 | */ |
1061 | switch (type) { | |
6940faba | 1062 | case ACPI_BUS_TYPE_PROCESSOR: |
1da177e4 LT |
1063 | case ACPI_BUS_TYPE_DEVICE: |
1064 | result = acpi_bus_get_status(device); | |
1065 | if (ACPI_FAILURE(result) || !device->status.present) { | |
1066 | result = -ENOENT; | |
1067 | goto end; | |
1068 | } | |
1069 | break; | |
1070 | default: | |
0c0e8921 BH |
1071 | STRUCT_TO_INT(device->status) = |
1072 | ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | | |
1073 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; | |
1da177e4 LT |
1074 | break; |
1075 | } | |
1076 | ||
1077 | /* | |
1078 | * Initialize Device | |
1079 | * ----------------- | |
1080 | * TBD: Synch with Core's enumeration/initialization process. | |
1081 | */ | |
1082 | ||
1083 | /* | |
1084 | * Hardware ID, Unique ID, & Bus Address | |
1085 | * ------------------------------------- | |
1086 | */ | |
4be44fcd | 1087 | acpi_device_set_id(device, parent, handle, type); |
1da177e4 LT |
1088 | |
1089 | /* | |
1090 | * Power Management | |
1091 | * ---------------- | |
1092 | */ | |
1093 | if (device->flags.power_manageable) { | |
1094 | result = acpi_bus_get_power_flags(device); | |
1095 | if (result) | |
1096 | goto end; | |
1097 | } | |
1098 | ||
4be44fcd | 1099 | /* |
1da177e4 LT |
1100 | * Wakeup device management |
1101 | *----------------------- | |
1102 | */ | |
1103 | if (device->flags.wake_capable) { | |
1104 | result = acpi_bus_get_wakeup_device_flags(device); | |
1105 | if (result) | |
1106 | goto end; | |
1107 | } | |
1108 | ||
1109 | /* | |
1110 | * Performance Management | |
1111 | * ---------------------- | |
1112 | */ | |
1113 | if (device->flags.performance_manageable) { | |
1114 | result = acpi_bus_get_perf_flags(device); | |
1115 | if (result) | |
1116 | goto end; | |
1117 | } | |
1118 | ||
4be44fcd | 1119 | if ((result = acpi_device_set_context(device, type))) |
1da177e4 LT |
1120 | goto end; |
1121 | ||
e49bd2dd | 1122 | result = acpi_device_register(device, parent); |
1da177e4 LT |
1123 | |
1124 | /* | |
2786f6e3 | 1125 | * Bind _ADR-Based Devices when hot add |
1da177e4 LT |
1126 | */ |
1127 | if (device->flags.bus_address) { | |
1128 | if (device->parent && device->parent->ops.bind) | |
1129 | device->parent->ops.bind(device); | |
1130 | } | |
1131 | ||
4be44fcd | 1132 | end: |
1da177e4 LT |
1133 | if (!result) |
1134 | *child = device; | |
1135 | else { | |
6044ec88 | 1136 | kfree(device->pnp.cid_list); |
1da177e4 LT |
1137 | kfree(device); |
1138 | } | |
1139 | ||
d550d98d | 1140 | return result; |
1da177e4 | 1141 | } |
1da177e4 | 1142 | |
4be44fcd | 1143 | static int acpi_bus_scan(struct acpi_device *start, struct acpi_bus_ops *ops) |
1da177e4 | 1144 | { |
4be44fcd LB |
1145 | acpi_status status = AE_OK; |
1146 | struct acpi_device *parent = NULL; | |
1147 | struct acpi_device *child = NULL; | |
1148 | acpi_handle phandle = NULL; | |
1149 | acpi_handle chandle = NULL; | |
1150 | acpi_object_type type = 0; | |
1151 | u32 level = 1; | |
1da177e4 | 1152 | |
1da177e4 LT |
1153 | |
1154 | if (!start) | |
d550d98d | 1155 | return -EINVAL; |
1da177e4 LT |
1156 | |
1157 | parent = start; | |
1158 | phandle = start->handle; | |
4be44fcd | 1159 | |
1da177e4 LT |
1160 | /* |
1161 | * Parse through the ACPI namespace, identify all 'devices', and | |
1162 | * create a new 'struct acpi_device' for each. | |
1163 | */ | |
1164 | while ((level > 0) && parent) { | |
1165 | ||
1166 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, | |
4be44fcd | 1167 | chandle, &chandle); |
1da177e4 LT |
1168 | |
1169 | /* | |
1170 | * If this scope is exhausted then move our way back up. | |
1171 | */ | |
1172 | if (ACPI_FAILURE(status)) { | |
1173 | level--; | |
1174 | chandle = phandle; | |
1175 | acpi_get_parent(phandle, &phandle); | |
1176 | if (parent->parent) | |
1177 | parent = parent->parent; | |
1178 | continue; | |
1179 | } | |
1180 | ||
1181 | status = acpi_get_type(chandle, &type); | |
1182 | if (ACPI_FAILURE(status)) | |
1183 | continue; | |
1184 | ||
1185 | /* | |
1186 | * If this is a scope object then parse it (depth-first). | |
1187 | */ | |
1188 | if (type == ACPI_TYPE_LOCAL_SCOPE) { | |
1189 | level++; | |
1190 | phandle = chandle; | |
1191 | chandle = NULL; | |
1192 | continue; | |
1193 | } | |
1194 | ||
1195 | /* | |
1196 | * We're only interested in objects that we consider 'devices'. | |
1197 | */ | |
1198 | switch (type) { | |
1199 | case ACPI_TYPE_DEVICE: | |
1200 | type = ACPI_BUS_TYPE_DEVICE; | |
1201 | break; | |
1202 | case ACPI_TYPE_PROCESSOR: | |
1203 | type = ACPI_BUS_TYPE_PROCESSOR; | |
1204 | break; | |
1205 | case ACPI_TYPE_THERMAL: | |
1206 | type = ACPI_BUS_TYPE_THERMAL; | |
1207 | break; | |
1208 | case ACPI_TYPE_POWER: | |
1209 | type = ACPI_BUS_TYPE_POWER; | |
1210 | break; | |
1211 | default: | |
1212 | continue; | |
1213 | } | |
1214 | ||
3fb02738 RS |
1215 | if (ops->acpi_op_add) |
1216 | status = acpi_add_single_object(&child, parent, | |
c4168bff | 1217 | chandle, type, ops); |
4be44fcd | 1218 | else |
3fb02738 RS |
1219 | status = acpi_bus_get_device(chandle, &child); |
1220 | ||
4be44fcd LB |
1221 | if (ACPI_FAILURE(status)) |
1222 | continue; | |
3fb02738 | 1223 | |
c4168bff | 1224 | if (ops->acpi_op_start && !(ops->acpi_op_add)) { |
3fb02738 RS |
1225 | status = acpi_start_single_object(child); |
1226 | if (ACPI_FAILURE(status)) | |
1227 | continue; | |
1228 | } | |
1da177e4 LT |
1229 | |
1230 | /* | |
1231 | * If the device is present, enabled, and functioning then | |
1232 | * parse its scope (depth-first). Note that we need to | |
1233 | * represent absent devices to facilitate PnP notifications | |
1234 | * -- but only the subtree head (not all of its children, | |
1235 | * which will be enumerated when the parent is inserted). | |
1236 | * | |
1237 | * TBD: Need notifications and other detection mechanisms | |
4be44fcd | 1238 | * in place before we can fully implement this. |
1da177e4 LT |
1239 | */ |
1240 | if (child->status.present) { | |
1241 | status = acpi_get_next_object(ACPI_TYPE_ANY, chandle, | |
1242 | NULL, NULL); | |
1243 | if (ACPI_SUCCESS(status)) { | |
1244 | level++; | |
1245 | phandle = chandle; | |
1246 | chandle = NULL; | |
1247 | parent = child; | |
1248 | } | |
1249 | } | |
1250 | } | |
1251 | ||
d550d98d | 1252 | return 0; |
1da177e4 | 1253 | } |
1da177e4 | 1254 | |
3fb02738 | 1255 | int |
4be44fcd LB |
1256 | acpi_bus_add(struct acpi_device **child, |
1257 | struct acpi_device *parent, acpi_handle handle, int type) | |
3fb02738 RS |
1258 | { |
1259 | int result; | |
1260 | struct acpi_bus_ops ops; | |
1261 | ||
c4168bff LS |
1262 | memset(&ops, 0, sizeof(ops)); |
1263 | ops.acpi_op_add = 1; | |
3fb02738 | 1264 | |
c4168bff LS |
1265 | result = acpi_add_single_object(child, parent, handle, type, &ops); |
1266 | if (!result) | |
3fb02738 | 1267 | result = acpi_bus_scan(*child, &ops); |
c4168bff | 1268 | |
d550d98d | 1269 | return result; |
3fb02738 | 1270 | } |
4be44fcd | 1271 | |
3fb02738 RS |
1272 | EXPORT_SYMBOL(acpi_bus_add); |
1273 | ||
4be44fcd | 1274 | int acpi_bus_start(struct acpi_device *device) |
3fb02738 RS |
1275 | { |
1276 | int result; | |
1277 | struct acpi_bus_ops ops; | |
1278 | ||
3fb02738 RS |
1279 | |
1280 | if (!device) | |
d550d98d | 1281 | return -EINVAL; |
3fb02738 RS |
1282 | |
1283 | result = acpi_start_single_object(device); | |
1284 | if (!result) { | |
1285 | memset(&ops, 0, sizeof(ops)); | |
1286 | ops.acpi_op_start = 1; | |
1287 | result = acpi_bus_scan(device, &ops); | |
1288 | } | |
d550d98d | 1289 | return result; |
3fb02738 | 1290 | } |
4be44fcd | 1291 | |
3fb02738 | 1292 | EXPORT_SYMBOL(acpi_bus_start); |
1da177e4 | 1293 | |
ceaba663 | 1294 | int acpi_bus_trim(struct acpi_device *start, int rmdevice) |
1da177e4 | 1295 | { |
4be44fcd LB |
1296 | acpi_status status; |
1297 | struct acpi_device *parent, *child; | |
1298 | acpi_handle phandle, chandle; | |
1299 | acpi_object_type type; | |
1300 | u32 level = 1; | |
1301 | int err = 0; | |
1302 | ||
1303 | parent = start; | |
1da177e4 LT |
1304 | phandle = start->handle; |
1305 | child = chandle = NULL; | |
1306 | ||
1307 | while ((level > 0) && parent && (!err)) { | |
1308 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, | |
4be44fcd | 1309 | chandle, &chandle); |
1da177e4 LT |
1310 | |
1311 | /* | |
1312 | * If this scope is exhausted then move our way back up. | |
1313 | */ | |
1314 | if (ACPI_FAILURE(status)) { | |
1315 | level--; | |
1316 | chandle = phandle; | |
1317 | acpi_get_parent(phandle, &phandle); | |
1318 | child = parent; | |
1319 | parent = parent->parent; | |
1320 | ||
1321 | if (level == 0) | |
1322 | err = acpi_bus_remove(child, rmdevice); | |
1323 | else | |
1324 | err = acpi_bus_remove(child, 1); | |
1325 | ||
1326 | continue; | |
1327 | } | |
1328 | ||
1329 | status = acpi_get_type(chandle, &type); | |
1330 | if (ACPI_FAILURE(status)) { | |
1331 | continue; | |
1332 | } | |
1333 | /* | |
1334 | * If there is a device corresponding to chandle then | |
1335 | * parse it (depth-first). | |
1336 | */ | |
1337 | if (acpi_bus_get_device(chandle, &child) == 0) { | |
1338 | level++; | |
1339 | phandle = chandle; | |
1340 | chandle = NULL; | |
1341 | parent = child; | |
1342 | } | |
1343 | continue; | |
1344 | } | |
1345 | return err; | |
1346 | } | |
ceaba663 KA |
1347 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
1348 | ||
1da177e4 | 1349 | |
4be44fcd | 1350 | static int acpi_bus_scan_fixed(struct acpi_device *root) |
1da177e4 | 1351 | { |
4be44fcd LB |
1352 | int result = 0; |
1353 | struct acpi_device *device = NULL; | |
c4168bff | 1354 | struct acpi_bus_ops ops; |
1da177e4 LT |
1355 | |
1356 | if (!root) | |
d550d98d | 1357 | return -ENODEV; |
1da177e4 | 1358 | |
c4168bff LS |
1359 | memset(&ops, 0, sizeof(ops)); |
1360 | ops.acpi_op_add = 1; | |
1361 | ops.acpi_op_start = 1; | |
1362 | ||
1da177e4 LT |
1363 | /* |
1364 | * Enumerate all fixed-feature devices. | |
1365 | */ | |
cee324b1 | 1366 | if ((acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON) == 0) { |
3fb02738 | 1367 | result = acpi_add_single_object(&device, acpi_root, |
4be44fcd | 1368 | NULL, |
c4168bff LS |
1369 | ACPI_BUS_TYPE_POWER_BUTTON, |
1370 | &ops); | |
3fb02738 | 1371 | } |
1da177e4 | 1372 | |
cee324b1 | 1373 | if ((acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON) == 0) { |
3fb02738 | 1374 | result = acpi_add_single_object(&device, acpi_root, |
4be44fcd | 1375 | NULL, |
c4168bff LS |
1376 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
1377 | &ops); | |
3fb02738 | 1378 | } |
1da177e4 | 1379 | |
d550d98d | 1380 | return result; |
1da177e4 LT |
1381 | } |
1382 | ||
1da177e4 LT |
1383 | static int __init acpi_scan_init(void) |
1384 | { | |
1385 | int result; | |
3fb02738 | 1386 | struct acpi_bus_ops ops; |
1da177e4 | 1387 | |
1da177e4 LT |
1388 | |
1389 | if (acpi_disabled) | |
d550d98d | 1390 | return 0; |
1da177e4 | 1391 | |
c4168bff LS |
1392 | memset(&ops, 0, sizeof(ops)); |
1393 | ops.acpi_op_add = 1; | |
1394 | ops.acpi_op_start = 1; | |
1da177e4 | 1395 | |
5b327265 PM |
1396 | result = bus_register(&acpi_bus_type); |
1397 | if (result) { | |
1398 | /* We don't want to quit even if we failed to add suspend/resume */ | |
1399 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
1400 | } | |
1401 | ||
1da177e4 LT |
1402 | /* |
1403 | * Create the root device in the bus's device tree | |
1404 | */ | |
3fb02738 | 1405 | result = acpi_add_single_object(&acpi_root, NULL, ACPI_ROOT_OBJECT, |
c4168bff | 1406 | ACPI_BUS_TYPE_SYSTEM, &ops); |
1da177e4 LT |
1407 | if (result) |
1408 | goto Done; | |
1409 | ||
1410 | /* | |
1411 | * Enumerate devices in the ACPI namespace. | |
1412 | */ | |
1413 | result = acpi_bus_scan_fixed(acpi_root); | |
c4168bff | 1414 | if (!result) |
3fb02738 | 1415 | result = acpi_bus_scan(acpi_root, &ops); |
1da177e4 LT |
1416 | |
1417 | if (result) | |
1418 | acpi_device_unregister(acpi_root, ACPI_BUS_REMOVAL_NORMAL); | |
1419 | ||
4be44fcd | 1420 | Done: |
d550d98d | 1421 | return result; |
1da177e4 LT |
1422 | } |
1423 | ||
1424 | subsys_initcall(acpi_scan_init); |