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" | |
29b71a1c | 19 | #define ACPI_BUS_HID "LNXSYBUS" |
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 | }; |
29b71a1c TR |
32 | |
33 | /* | |
34 | * Creates hid/cid(s) string needed for modalias and uevent | |
35 | * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: | |
36 | * char *modalias: "acpi:IBM0001:ACPI0001" | |
37 | */ | |
b3e572d2 AB |
38 | static int create_modalias(struct acpi_device *acpi_dev, char *modalias, |
39 | int size) | |
40 | { | |
29b71a1c TR |
41 | int len; |
42 | ||
43 | if (!acpi_dev->flags.hardware_id) | |
44 | return -ENODEV; | |
45 | ||
46 | len = snprintf(modalias, size, "acpi:%s:", | |
47 | acpi_dev->pnp.hardware_id); | |
48 | if (len < 0 || len >= size) | |
49 | return -EINVAL; | |
50 | size -= len; | |
51 | ||
52 | if (acpi_dev->flags.compatible_ids) { | |
53 | struct acpi_compatible_id_list *cid_list; | |
54 | int i; | |
55 | int count; | |
56 | ||
57 | cid_list = acpi_dev->pnp.cid_list; | |
58 | for (i = 0; i < cid_list->count; i++) { | |
59 | count = snprintf(&modalias[len], size, "%s:", | |
60 | cid_list->id[i].value); | |
61 | if (count < 0 || count >= size) { | |
62 | printk(KERN_ERR "acpi: %s cid[%i] exceeds event buffer size", | |
63 | acpi_dev->pnp.device_name, i); | |
64 | break; | |
65 | } | |
66 | len += count; | |
67 | size -= count; | |
68 | } | |
69 | } | |
70 | ||
71 | modalias[len] = '\0'; | |
72 | return len; | |
73 | } | |
74 | ||
75 | static ssize_t | |
76 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
77 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
78 | int len; | |
79 | ||
80 | /* Device has no HID and no CID or string is >1024 */ | |
81 | len = create_modalias(acpi_dev, buf, 1024); | |
82 | if (len <= 0) | |
83 | return 0; | |
84 | buf[len++] = '\n'; | |
85 | return len; | |
86 | } | |
87 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); | |
88 | ||
4be44fcd | 89 | static int acpi_eject_operation(acpi_handle handle, int lockable) |
1da177e4 | 90 | { |
1da177e4 LT |
91 | struct acpi_object_list arg_list; |
92 | union acpi_object arg; | |
93 | acpi_status status = AE_OK; | |
1da177e4 | 94 | |
1da177e4 LT |
95 | /* |
96 | * TBD: evaluate _PS3? | |
97 | */ | |
1da177e4 | 98 | |
1da177e4 LT |
99 | if (lockable) { |
100 | arg_list.count = 1; | |
101 | arg_list.pointer = &arg; | |
102 | arg.type = ACPI_TYPE_INTEGER; | |
103 | arg.integer.value = 0; | |
104 | acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); | |
105 | } | |
1da177e4 | 106 | |
1da177e4 LT |
107 | arg_list.count = 1; |
108 | arg_list.pointer = &arg; | |
109 | arg.type = ACPI_TYPE_INTEGER; | |
110 | arg.integer.value = 1; | |
1da177e4 | 111 | |
1da177e4 LT |
112 | /* |
113 | * TBD: _EJD support. | |
114 | */ | |
1da177e4 | 115 | |
1da177e4 LT |
116 | status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); |
117 | if (ACPI_FAILURE(status)) { | |
4be44fcd | 118 | return (-ENODEV); |
1da177e4 | 119 | } |
1da177e4 | 120 | |
4be44fcd | 121 | return (0); |
1da177e4 LT |
122 | } |
123 | ||
1da177e4 | 124 | static ssize_t |
f883d9db PM |
125 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
126 | const char *buf, size_t count) | |
1da177e4 | 127 | { |
4be44fcd LB |
128 | int result; |
129 | int ret = count; | |
130 | int islockable; | |
131 | acpi_status status; | |
132 | acpi_handle handle; | |
133 | acpi_object_type type = 0; | |
f883d9db | 134 | struct acpi_device *acpi_device = to_acpi_device(d); |
1da177e4 | 135 | |
1da177e4 LT |
136 | if ((!count) || (buf[0] != '1')) { |
137 | return -EINVAL; | |
138 | } | |
1da177e4 | 139 | #ifndef FORCE_EJECT |
f883d9db | 140 | if (acpi_device->driver == NULL) { |
1da177e4 LT |
141 | ret = -ENODEV; |
142 | goto err; | |
143 | } | |
144 | #endif | |
f883d9db PM |
145 | status = acpi_get_type(acpi_device->handle, &type); |
146 | if (ACPI_FAILURE(status) || (!acpi_device->flags.ejectable)) { | |
1da177e4 LT |
147 | ret = -ENODEV; |
148 | goto err; | |
149 | } | |
1da177e4 | 150 | |
f883d9db PM |
151 | islockable = acpi_device->flags.lockable; |
152 | handle = acpi_device->handle; | |
9b6d97b6 | 153 | |
f883d9db | 154 | result = acpi_bus_trim(acpi_device, 1); |
1da177e4 | 155 | |
1da177e4 LT |
156 | if (!result) |
157 | result = acpi_eject_operation(handle, islockable); | |
1da177e4 | 158 | |
1da177e4 LT |
159 | if (result) { |
160 | ret = -EBUSY; | |
161 | } | |
4be44fcd | 162 | err: |
1da177e4 | 163 | return ret; |
1da177e4 LT |
164 | } |
165 | ||
f883d9db | 166 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
1da177e4 | 167 | |
e49bd2dd ZR |
168 | static ssize_t |
169 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
170 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1da177e4 | 171 | |
e49bd2dd | 172 | return sprintf(buf, "%s\n", acpi_dev->pnp.hardware_id); |
1da177e4 | 173 | } |
e49bd2dd | 174 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
1da177e4 | 175 | |
e49bd2dd ZR |
176 | static ssize_t |
177 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
178 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
179 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
180 | int result; | |
1da177e4 | 181 | |
e49bd2dd ZR |
182 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
183 | if(result) | |
184 | goto end; | |
1da177e4 | 185 | |
e49bd2dd ZR |
186 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
187 | kfree(path.pointer); | |
188 | end: | |
189 | return result; | |
1da177e4 | 190 | } |
e49bd2dd | 191 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
1da177e4 | 192 | |
e49bd2dd | 193 | static int acpi_device_setup_files(struct acpi_device *dev) |
1da177e4 | 194 | { |
f883d9db PM |
195 | acpi_status status; |
196 | acpi_handle temp; | |
e49bd2dd | 197 | int result = 0; |
1da177e4 LT |
198 | |
199 | /* | |
e49bd2dd | 200 | * Devices gotten from FADT don't have a "path" attribute |
1da177e4 | 201 | */ |
e49bd2dd ZR |
202 | if(dev->handle) { |
203 | result = device_create_file(&dev->dev, &dev_attr_path); | |
204 | if(result) | |
205 | goto end; | |
1da177e4 LT |
206 | } |
207 | ||
e49bd2dd ZR |
208 | if(dev->flags.hardware_id) { |
209 | result = device_create_file(&dev->dev, &dev_attr_hid); | |
210 | if(result) | |
211 | goto end; | |
212 | } | |
1da177e4 | 213 | |
29b71a1c TR |
214 | if (dev->flags.hardware_id || dev->flags.compatible_ids){ |
215 | result = device_create_file(&dev->dev, &dev_attr_modalias); | |
216 | if(result) | |
217 | goto end; | |
218 | } | |
219 | ||
e49bd2dd ZR |
220 | /* |
221 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
222 | * hot-removal function from userland. | |
223 | */ | |
f883d9db PM |
224 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); |
225 | if (ACPI_SUCCESS(status)) | |
e49bd2dd ZR |
226 | result = device_create_file(&dev->dev, &dev_attr_eject); |
227 | end: | |
228 | return result; | |
1da177e4 LT |
229 | } |
230 | ||
f883d9db | 231 | static void acpi_device_remove_files(struct acpi_device *dev) |
1da177e4 | 232 | { |
f883d9db PM |
233 | acpi_status status; |
234 | acpi_handle temp; | |
1da177e4 | 235 | |
f883d9db PM |
236 | /* |
237 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
238 | * hot-removal function from userland. | |
239 | */ | |
240 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); | |
241 | if (ACPI_SUCCESS(status)) | |
242 | device_remove_file(&dev->dev, &dev_attr_eject); | |
1da177e4 | 243 | |
29b71a1c TR |
244 | if (dev->flags.hardware_id || dev->flags.compatible_ids) |
245 | device_remove_file(&dev->dev, &dev_attr_modalias); | |
246 | ||
e49bd2dd ZR |
247 | if(dev->flags.hardware_id) |
248 | device_remove_file(&dev->dev, &dev_attr_hid); | |
249 | if(dev->handle) | |
250 | device_remove_file(&dev->dev, &dev_attr_path); | |
1da177e4 | 251 | } |
1da177e4 | 252 | /* -------------------------------------------------------------------------- |
9e89dde2 | 253 | ACPI Bus operations |
1da177e4 | 254 | -------------------------------------------------------------------------- */ |
29b71a1c TR |
255 | |
256 | int acpi_match_device_ids(struct acpi_device *device, | |
257 | const struct acpi_device_id *ids) | |
258 | { | |
259 | const struct acpi_device_id *id; | |
260 | ||
261 | if (device->flags.hardware_id) { | |
262 | for (id = ids; id->id[0]; id++) { | |
263 | if (!strcmp((char*)id->id, device->pnp.hardware_id)) | |
264 | return 0; | |
265 | } | |
266 | } | |
267 | ||
268 | if (device->flags.compatible_ids) { | |
269 | struct acpi_compatible_id_list *cid_list = device->pnp.cid_list; | |
270 | int i; | |
271 | ||
272 | for (id = ids; id->id[0]; id++) { | |
273 | /* compare multiple _CID entries against driver ids */ | |
274 | for (i = 0; i < cid_list->count; i++) { | |
275 | if (!strcmp((char*)id->id, | |
276 | cid_list->id[i].value)) | |
277 | return 0; | |
278 | } | |
279 | } | |
280 | } | |
281 | ||
282 | return -ENOENT; | |
283 | } | |
284 | EXPORT_SYMBOL(acpi_match_device_ids); | |
285 | ||
1890a97a | 286 | static void acpi_device_release(struct device *dev) |
1da177e4 | 287 | { |
1890a97a | 288 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 289 | |
1890a97a PM |
290 | kfree(acpi_dev->pnp.cid_list); |
291 | kfree(acpi_dev); | |
1da177e4 LT |
292 | } |
293 | ||
5d9464a4 | 294 | static int acpi_device_suspend(struct device *dev, pm_message_t state) |
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.suspend) |
300 | return acpi_drv->ops.suspend(acpi_dev, state); | |
1da177e4 LT |
301 | return 0; |
302 | } | |
1da177e4 | 303 | |
5d9464a4 | 304 | static int acpi_device_resume(struct device *dev) |
9e89dde2 | 305 | { |
5d9464a4 PM |
306 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
307 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
1da177e4 | 308 | |
5d9464a4 PM |
309 | if (acpi_drv && acpi_drv->ops.resume) |
310 | return acpi_drv->ops.resume(acpi_dev); | |
d550d98d | 311 | return 0; |
1da177e4 LT |
312 | } |
313 | ||
5d9464a4 | 314 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 315 | { |
5d9464a4 PM |
316 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
317 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
1da177e4 | 318 | |
29b71a1c | 319 | return !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
5d9464a4 | 320 | } |
1da177e4 | 321 | |
5d9464a4 | 322 | static int acpi_device_uevent(struct device *dev, char **envp, int num_envp, |
29b71a1c | 323 | char *buffer, int buffer_size) |
1da177e4 | 324 | { |
5d9464a4 | 325 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
5d9464a4 | 326 | |
29b71a1c TR |
327 | strcpy(buffer, "MODALIAS="); |
328 | if (create_modalias(acpi_dev, buffer + 9, buffer_size - 9) > 0) { | |
329 | envp[0] = buffer; | |
330 | envp[1] = NULL; | |
9e89dde2 | 331 | } |
9e89dde2 | 332 | return 0; |
1da177e4 LT |
333 | } |
334 | ||
5d9464a4 PM |
335 | static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *); |
336 | static int acpi_start_single_object(struct acpi_device *); | |
337 | static int acpi_device_probe(struct device * dev) | |
1da177e4 | 338 | { |
5d9464a4 PM |
339 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
340 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
341 | int ret; | |
342 | ||
343 | ret = acpi_bus_driver_init(acpi_dev, acpi_drv); | |
344 | if (!ret) { | |
c4168bff LS |
345 | if (acpi_dev->bus_ops.acpi_op_start) |
346 | acpi_start_single_object(acpi_dev); | |
5d9464a4 PM |
347 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
348 | "Found driver [%s] for device [%s]\n", | |
349 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
350 | get_device(dev); | |
351 | } | |
352 | return ret; | |
353 | } | |
1da177e4 | 354 | |
5d9464a4 PM |
355 | static int acpi_device_remove(struct device * dev) |
356 | { | |
357 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
358 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
359 | ||
360 | if (acpi_drv) { | |
361 | if (acpi_drv->ops.stop) | |
96333578 | 362 | acpi_drv->ops.stop(acpi_dev, acpi_dev->removal_type); |
5d9464a4 | 363 | if (acpi_drv->ops.remove) |
96333578 | 364 | acpi_drv->ops.remove(acpi_dev, acpi_dev->removal_type); |
1da177e4 | 365 | } |
5d9464a4 PM |
366 | acpi_dev->driver = NULL; |
367 | acpi_driver_data(dev) = NULL; | |
1da177e4 | 368 | |
5d9464a4 | 369 | put_device(dev); |
9e89dde2 ZR |
370 | return 0; |
371 | } | |
1da177e4 | 372 | |
5d9464a4 | 373 | static void acpi_device_shutdown(struct device *dev) |
1da177e4 | 374 | { |
5d9464a4 PM |
375 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
376 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
1da177e4 | 377 | |
5d9464a4 PM |
378 | if (acpi_drv && acpi_drv->ops.shutdown) |
379 | acpi_drv->ops.shutdown(acpi_dev); | |
1da177e4 | 380 | |
5d9464a4 | 381 | return ; |
1da177e4 LT |
382 | } |
383 | ||
55955aad | 384 | struct bus_type acpi_bus_type = { |
9e89dde2 ZR |
385 | .name = "acpi", |
386 | .suspend = acpi_device_suspend, | |
387 | .resume = acpi_device_resume, | |
5d9464a4 PM |
388 | .shutdown = acpi_device_shutdown, |
389 | .match = acpi_bus_match, | |
390 | .probe = acpi_device_probe, | |
391 | .remove = acpi_device_remove, | |
392 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
393 | }; |
394 | ||
e49bd2dd | 395 | static int acpi_device_register(struct acpi_device *device, |
9e89dde2 | 396 | struct acpi_device *parent) |
1da177e4 | 397 | { |
4be44fcd | 398 | int result; |
e49bd2dd ZR |
399 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
400 | int found = 0; | |
9e89dde2 ZR |
401 | /* |
402 | * Linkage | |
403 | * ------- | |
404 | * Link this device to its parent and siblings. | |
405 | */ | |
406 | INIT_LIST_HEAD(&device->children); | |
407 | INIT_LIST_HEAD(&device->node); | |
408 | INIT_LIST_HEAD(&device->g_list); | |
409 | INIT_LIST_HEAD(&device->wakeup_list); | |
1da177e4 | 410 | |
e49bd2dd ZR |
411 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
412 | if (!new_bus_id) { | |
413 | printk(KERN_ERR PREFIX "Memory allocation error\n"); | |
414 | return -ENOMEM; | |
1da177e4 | 415 | } |
e49bd2dd | 416 | |
9e89dde2 | 417 | spin_lock(&acpi_device_lock); |
e49bd2dd ZR |
418 | /* |
419 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
420 | * If failed, create one and link it into acpi_bus_id_list | |
421 | */ | |
422 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
bb095854 | 423 | if(!strcmp(acpi_device_bus_id->bus_id, device->flags.hardware_id? device->pnp.hardware_id : "device")) { |
e49bd2dd ZR |
424 | acpi_device_bus_id->instance_no ++; |
425 | found = 1; | |
426 | kfree(new_bus_id); | |
427 | break; | |
428 | } | |
1da177e4 | 429 | } |
e49bd2dd ZR |
430 | if(!found) { |
431 | acpi_device_bus_id = new_bus_id; | |
bb095854 | 432 | strcpy(acpi_device_bus_id->bus_id, device->flags.hardware_id ? device->pnp.hardware_id : "device"); |
e49bd2dd ZR |
433 | acpi_device_bus_id->instance_no = 0; |
434 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 435 | } |
e49bd2dd | 436 | sprintf(device->dev.bus_id, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 437 | |
9e89dde2 ZR |
438 | if (device->parent) { |
439 | list_add_tail(&device->node, &device->parent->children); | |
440 | list_add_tail(&device->g_list, &device->parent->g_list); | |
441 | } else | |
442 | list_add_tail(&device->g_list, &acpi_device_list); | |
443 | if (device->wakeup.flags.valid) | |
444 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
445 | spin_unlock(&acpi_device_lock); | |
1da177e4 | 446 | |
1890a97a PM |
447 | if (device->parent) |
448 | device->dev.parent = &parent->dev; | |
449 | device->dev.bus = &acpi_bus_type; | |
450 | device_initialize(&device->dev); | |
1890a97a | 451 | device->dev.release = &acpi_device_release; |
e49bd2dd ZR |
452 | result = device_add(&device->dev); |
453 | if(result) { | |
454 | printk("Error adding device %s", device->dev.bus_id); | |
455 | goto end; | |
1da177e4 | 456 | } |
1da177e4 | 457 | |
e49bd2dd ZR |
458 | result = acpi_device_setup_files(device); |
459 | if(result) | |
460 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error creating sysfs interface for device %s\n", device->dev.bus_id)); | |
1da177e4 | 461 | |
96333578 | 462 | device->removal_type = ACPI_BUS_REMOVAL_NORMAL; |
1da177e4 | 463 | return 0; |
e49bd2dd ZR |
464 | end: |
465 | spin_lock(&acpi_device_lock); | |
466 | if (device->parent) { | |
467 | list_del(&device->node); | |
468 | list_del(&device->g_list); | |
469 | } else | |
470 | list_del(&device->g_list); | |
471 | list_del(&device->wakeup_list); | |
472 | spin_unlock(&acpi_device_lock); | |
473 | return result; | |
1da177e4 LT |
474 | } |
475 | ||
9e89dde2 ZR |
476 | static void acpi_device_unregister(struct acpi_device *device, int type) |
477 | { | |
478 | spin_lock(&acpi_device_lock); | |
479 | if (device->parent) { | |
480 | list_del(&device->node); | |
481 | list_del(&device->g_list); | |
482 | } else | |
483 | list_del(&device->g_list); | |
1da177e4 | 484 | |
9e89dde2 | 485 | list_del(&device->wakeup_list); |
9e89dde2 | 486 | spin_unlock(&acpi_device_lock); |
1da177e4 | 487 | |
9e89dde2 | 488 | acpi_detach_data(device->handle, acpi_bus_data_handler); |
1890a97a | 489 | |
f883d9db | 490 | acpi_device_remove_files(device); |
1890a97a | 491 | device_unregister(&device->dev); |
1da177e4 LT |
492 | } |
493 | ||
9e89dde2 ZR |
494 | /* -------------------------------------------------------------------------- |
495 | Driver Management | |
496 | -------------------------------------------------------------------------- */ | |
1da177e4 | 497 | /** |
d758a8fa RD |
498 | * acpi_bus_driver_init - add a device to a driver |
499 | * @device: the device to add and initialize | |
500 | * @driver: driver for the device | |
501 | * | |
1da177e4 | 502 | * Used to initialize a device via its device driver. Called whenever a |
1890a97a | 503 | * driver is bound to a device. Invokes the driver's add() ops. |
1da177e4 LT |
504 | */ |
505 | static int | |
4be44fcd | 506 | acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) |
1da177e4 | 507 | { |
4be44fcd | 508 | int result = 0; |
1da177e4 | 509 | |
1da177e4 LT |
510 | |
511 | if (!device || !driver) | |
d550d98d | 512 | return -EINVAL; |
1da177e4 LT |
513 | |
514 | if (!driver->ops.add) | |
d550d98d | 515 | return -ENOSYS; |
1da177e4 LT |
516 | |
517 | result = driver->ops.add(device); | |
518 | if (result) { | |
519 | device->driver = NULL; | |
520 | acpi_driver_data(device) = NULL; | |
d550d98d | 521 | return result; |
1da177e4 LT |
522 | } |
523 | ||
524 | device->driver = driver; | |
525 | ||
526 | /* | |
527 | * TBD - Configuration Management: Assign resources to device based | |
528 | * upon possible configuration and currently allocated resources. | |
529 | */ | |
530 | ||
4be44fcd LB |
531 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
532 | "Driver successfully bound to device\n")); | |
d550d98d | 533 | return 0; |
3fb02738 RS |
534 | } |
535 | ||
8713cbef | 536 | static int acpi_start_single_object(struct acpi_device *device) |
3fb02738 RS |
537 | { |
538 | int result = 0; | |
539 | struct acpi_driver *driver; | |
540 | ||
3fb02738 RS |
541 | |
542 | if (!(driver = device->driver)) | |
d550d98d | 543 | return 0; |
3fb02738 | 544 | |
1da177e4 LT |
545 | if (driver->ops.start) { |
546 | result = driver->ops.start(device); | |
547 | if (result && driver->ops.remove) | |
548 | driver->ops.remove(device, ACPI_BUS_REMOVAL_NORMAL); | |
1da177e4 LT |
549 | } |
550 | ||
d550d98d | 551 | return result; |
1da177e4 LT |
552 | } |
553 | ||
9e89dde2 ZR |
554 | /** |
555 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
556 | * @driver: driver being registered | |
557 | * | |
558 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
559 | * devices that match the driver's criteria and binds. Returns zero for | |
560 | * success or a negative error status for failure. | |
561 | */ | |
562 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
1da177e4 | 563 | { |
1890a97a | 564 | int ret; |
1da177e4 | 565 | |
9e89dde2 ZR |
566 | if (acpi_disabled) |
567 | return -ENODEV; | |
1890a97a PM |
568 | driver->drv.name = driver->name; |
569 | driver->drv.bus = &acpi_bus_type; | |
570 | driver->drv.owner = driver->owner; | |
1da177e4 | 571 | |
1890a97a PM |
572 | ret = driver_register(&driver->drv); |
573 | return ret; | |
9e89dde2 | 574 | } |
1da177e4 | 575 | |
9e89dde2 ZR |
576 | EXPORT_SYMBOL(acpi_bus_register_driver); |
577 | ||
578 | /** | |
579 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus | |
580 | * @driver: driver to unregister | |
581 | * | |
582 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
583 | * devices that match the driver's criteria and unbinds. | |
584 | */ | |
585 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
586 | { | |
1890a97a | 587 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
588 | } |
589 | ||
590 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
591 | ||
9e89dde2 ZR |
592 | /* -------------------------------------------------------------------------- |
593 | Device Enumeration | |
594 | -------------------------------------------------------------------------- */ | |
595 | acpi_status | |
596 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
597 | { | |
598 | acpi_status status; | |
599 | acpi_handle tmp; | |
600 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
601 | union acpi_object *obj; | |
602 | ||
603 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
604 | if (ACPI_FAILURE(status)) | |
605 | return status; | |
606 | ||
607 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
608 | if (ACPI_SUCCESS(status)) { | |
609 | obj = buffer.pointer; | |
610 | status = acpi_get_handle(NULL, obj->string.pointer, ejd); | |
611 | kfree(buffer.pointer); | |
612 | } | |
613 | return status; | |
614 | } | |
615 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
616 | ||
617 | void acpi_bus_data_handler(acpi_handle handle, u32 function, void *context) | |
618 | { | |
619 | ||
620 | /* TBD */ | |
621 | ||
622 | return; | |
623 | } | |
624 | ||
9e89dde2 ZR |
625 | static int acpi_bus_get_perf_flags(struct acpi_device *device) |
626 | { | |
627 | device->performance.state = ACPI_STATE_UNKNOWN; | |
628 | return 0; | |
629 | } | |
630 | ||
631 | static acpi_status | |
632 | acpi_bus_extract_wakeup_device_power_package(struct acpi_device *device, | |
633 | union acpi_object *package) | |
634 | { | |
635 | int i = 0; | |
636 | union acpi_object *element = NULL; | |
637 | ||
638 | if (!device || !package || (package->package.count < 2)) | |
639 | return AE_BAD_PARAMETER; | |
640 | ||
641 | element = &(package->package.elements[0]); | |
642 | if (!element) | |
643 | return AE_BAD_PARAMETER; | |
644 | if (element->type == ACPI_TYPE_PACKAGE) { | |
645 | if ((element->package.count < 2) || | |
646 | (element->package.elements[0].type != | |
647 | ACPI_TYPE_LOCAL_REFERENCE) | |
648 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) | |
649 | return AE_BAD_DATA; | |
650 | device->wakeup.gpe_device = | |
651 | element->package.elements[0].reference.handle; | |
652 | device->wakeup.gpe_number = | |
653 | (u32) element->package.elements[1].integer.value; | |
654 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
655 | device->wakeup.gpe_number = element->integer.value; | |
656 | } else | |
657 | return AE_BAD_DATA; | |
658 | ||
659 | element = &(package->package.elements[1]); | |
660 | if (element->type != ACPI_TYPE_INTEGER) { | |
661 | return AE_BAD_DATA; | |
662 | } | |
663 | device->wakeup.sleep_state = element->integer.value; | |
664 | ||
665 | if ((package->package.count - 2) > ACPI_MAX_HANDLES) { | |
666 | return AE_NO_MEMORY; | |
667 | } | |
668 | device->wakeup.resources.count = package->package.count - 2; | |
669 | for (i = 0; i < device->wakeup.resources.count; i++) { | |
670 | element = &(package->package.elements[i + 2]); | |
671 | if (element->type != ACPI_TYPE_ANY) { | |
672 | return AE_BAD_DATA; | |
1da177e4 | 673 | } |
9e89dde2 ZR |
674 | |
675 | device->wakeup.resources.handles[i] = element->reference.handle; | |
1da177e4 | 676 | } |
9e89dde2 ZR |
677 | |
678 | return AE_OK; | |
1da177e4 LT |
679 | } |
680 | ||
9e89dde2 | 681 | static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
1da177e4 | 682 | { |
9e89dde2 ZR |
683 | acpi_status status = 0; |
684 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
685 | union acpi_object *package = NULL; | |
1da177e4 | 686 | |
29b71a1c TR |
687 | struct acpi_device_id button_device_ids[] = { |
688 | {"PNP0C0D", 0}, | |
689 | {"PNP0C0C", 0}, | |
690 | {"PNP0C0E", 0}, | |
691 | {"", 0}, | |
692 | }; | |
693 | ||
1da177e4 | 694 | |
9e89dde2 ZR |
695 | /* _PRW */ |
696 | status = acpi_evaluate_object(device->handle, "_PRW", NULL, &buffer); | |
697 | if (ACPI_FAILURE(status)) { | |
698 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
699 | goto end; | |
1da177e4 | 700 | } |
1da177e4 | 701 | |
9e89dde2 ZR |
702 | package = (union acpi_object *)buffer.pointer; |
703 | status = acpi_bus_extract_wakeup_device_power_package(device, package); | |
704 | if (ACPI_FAILURE(status)) { | |
705 | ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package")); | |
706 | goto end; | |
707 | } | |
1da177e4 | 708 | |
9e89dde2 | 709 | kfree(buffer.pointer); |
1da177e4 | 710 | |
9e89dde2 ZR |
711 | device->wakeup.flags.valid = 1; |
712 | /* Power button, Lid switch always enable wakeup */ | |
29b71a1c | 713 | if (!acpi_match_device_ids(device, button_device_ids)) |
9e89dde2 | 714 | device->wakeup.flags.run_wake = 1; |
1da177e4 | 715 | |
9e89dde2 ZR |
716 | end: |
717 | if (ACPI_FAILURE(status)) | |
718 | device->flags.wake_capable = 0; | |
d550d98d | 719 | return 0; |
1da177e4 | 720 | } |
1da177e4 | 721 | |
9e89dde2 | 722 | static int acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 723 | { |
9e89dde2 ZR |
724 | acpi_status status = 0; |
725 | acpi_handle handle = NULL; | |
726 | u32 i = 0; | |
1a365616 | 727 | |
4be44fcd | 728 | |
9e89dde2 ZR |
729 | /* |
730 | * Power Management Flags | |
731 | */ | |
732 | status = acpi_get_handle(device->handle, "_PSC", &handle); | |
733 | if (ACPI_SUCCESS(status)) | |
734 | device->power.flags.explicit_get = 1; | |
735 | status = acpi_get_handle(device->handle, "_IRC", &handle); | |
736 | if (ACPI_SUCCESS(status)) | |
737 | device->power.flags.inrush_current = 1; | |
1da177e4 | 738 | |
9e89dde2 ZR |
739 | /* |
740 | * Enumerate supported power management states | |
741 | */ | |
742 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3; i++) { | |
743 | struct acpi_device_power_state *ps = &device->power.states[i]; | |
744 | char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' }; | |
1da177e4 | 745 | |
9e89dde2 ZR |
746 | /* Evaluate "_PRx" to se if power resources are referenced */ |
747 | acpi_evaluate_reference(device->handle, object_name, NULL, | |
748 | &ps->resources); | |
749 | if (ps->resources.count) { | |
750 | device->power.flags.power_resources = 1; | |
751 | ps->flags.valid = 1; | |
1da177e4 | 752 | } |
1da177e4 | 753 | |
9e89dde2 ZR |
754 | /* Evaluate "_PSx" to see if we can do explicit sets */ |
755 | object_name[2] = 'S'; | |
756 | status = acpi_get_handle(device->handle, object_name, &handle); | |
757 | if (ACPI_SUCCESS(status)) { | |
758 | ps->flags.explicit_set = 1; | |
759 | ps->flags.valid = 1; | |
1da177e4 | 760 | } |
1da177e4 | 761 | |
9e89dde2 ZR |
762 | /* State is valid if we have some power control */ |
763 | if (ps->resources.count || ps->flags.explicit_set) | |
764 | ps->flags.valid = 1; | |
1da177e4 | 765 | |
9e89dde2 ZR |
766 | ps->power = -1; /* Unknown - driver assigned */ |
767 | ps->latency = -1; /* Unknown - driver assigned */ | |
768 | } | |
1da177e4 | 769 | |
9e89dde2 ZR |
770 | /* Set defaults for D0 and D3 states (always valid) */ |
771 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
772 | device->power.states[ACPI_STATE_D0].power = 100; | |
773 | device->power.states[ACPI_STATE_D3].flags.valid = 1; | |
774 | device->power.states[ACPI_STATE_D3].power = 0; | |
c8f7a62c | 775 | |
9e89dde2 | 776 | /* TBD: System wake support and resource requirements. */ |
c8f7a62c | 777 | |
9e89dde2 | 778 | device->power.state = ACPI_STATE_UNKNOWN; |
c8f7a62c | 779 | |
9e89dde2 ZR |
780 | return 0; |
781 | } | |
c8f7a62c | 782 | |
4be44fcd | 783 | static int acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 784 | { |
4be44fcd LB |
785 | acpi_status status = AE_OK; |
786 | acpi_handle temp = NULL; | |
1da177e4 | 787 | |
1da177e4 LT |
788 | |
789 | /* Presence of _STA indicates 'dynamic_status' */ | |
790 | status = acpi_get_handle(device->handle, "_STA", &temp); | |
791 | if (ACPI_SUCCESS(status)) | |
792 | device->flags.dynamic_status = 1; | |
793 | ||
794 | /* Presence of _CID indicates 'compatible_ids' */ | |
795 | status = acpi_get_handle(device->handle, "_CID", &temp); | |
796 | if (ACPI_SUCCESS(status)) | |
797 | device->flags.compatible_ids = 1; | |
798 | ||
799 | /* Presence of _RMV indicates 'removable' */ | |
800 | status = acpi_get_handle(device->handle, "_RMV", &temp); | |
801 | if (ACPI_SUCCESS(status)) | |
802 | device->flags.removable = 1; | |
803 | ||
804 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
805 | status = acpi_get_handle(device->handle, "_EJD", &temp); | |
806 | if (ACPI_SUCCESS(status)) | |
807 | device->flags.ejectable = 1; | |
808 | else { | |
809 | status = acpi_get_handle(device->handle, "_EJ0", &temp); | |
810 | if (ACPI_SUCCESS(status)) | |
811 | device->flags.ejectable = 1; | |
812 | } | |
813 | ||
814 | /* Presence of _LCK indicates 'lockable' */ | |
815 | status = acpi_get_handle(device->handle, "_LCK", &temp); | |
816 | if (ACPI_SUCCESS(status)) | |
817 | device->flags.lockable = 1; | |
818 | ||
819 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ | |
820 | status = acpi_get_handle(device->handle, "_PS0", &temp); | |
821 | if (ACPI_FAILURE(status)) | |
822 | status = acpi_get_handle(device->handle, "_PR0", &temp); | |
823 | if (ACPI_SUCCESS(status)) | |
824 | device->flags.power_manageable = 1; | |
825 | ||
826 | /* Presence of _PRW indicates wake capable */ | |
827 | status = acpi_get_handle(device->handle, "_PRW", &temp); | |
828 | if (ACPI_SUCCESS(status)) | |
829 | device->flags.wake_capable = 1; | |
830 | ||
831 | /* TBD: Peformance management */ | |
832 | ||
d550d98d | 833 | return 0; |
1da177e4 LT |
834 | } |
835 | ||
4be44fcd LB |
836 | static void acpi_device_get_busid(struct acpi_device *device, |
837 | acpi_handle handle, int type) | |
1da177e4 | 838 | { |
4be44fcd LB |
839 | char bus_id[5] = { '?', 0 }; |
840 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
841 | int i = 0; | |
1da177e4 LT |
842 | |
843 | /* | |
844 | * Bus ID | |
845 | * ------ | |
846 | * The device's Bus ID is simply the object name. | |
847 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
848 | */ | |
849 | switch (type) { | |
850 | case ACPI_BUS_TYPE_SYSTEM: | |
851 | strcpy(device->pnp.bus_id, "ACPI"); | |
852 | break; | |
853 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
854 | strcpy(device->pnp.bus_id, "PWRF"); | |
855 | break; | |
856 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
857 | strcpy(device->pnp.bus_id, "SLPF"); | |
858 | break; | |
859 | default: | |
860 | acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer); | |
861 | /* Clean up trailing underscores (if any) */ | |
862 | for (i = 3; i > 1; i--) { | |
863 | if (bus_id[i] == '_') | |
864 | bus_id[i] = '\0'; | |
865 | else | |
866 | break; | |
867 | } | |
868 | strcpy(device->pnp.bus_id, bus_id); | |
869 | break; | |
870 | } | |
871 | } | |
872 | ||
ae843332 ZR |
873 | static int |
874 | acpi_video_bus_match(struct acpi_device *device) | |
875 | { | |
876 | acpi_handle h_dummy1; | |
877 | acpi_handle h_dummy2; | |
878 | acpi_handle h_dummy3; | |
879 | ||
880 | ||
881 | if (!device) | |
882 | return -EINVAL; | |
883 | ||
884 | /* Since there is no HID, CID for ACPI Video drivers, we have | |
885 | * to check well known required nodes for each feature we support. | |
886 | */ | |
887 | ||
888 | /* Does this device able to support video switching ? */ | |
889 | if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOD", &h_dummy1)) && | |
890 | ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOS", &h_dummy2))) | |
891 | return 0; | |
892 | ||
893 | /* Does this device able to retrieve a video ROM ? */ | |
894 | if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_ROM", &h_dummy1))) | |
895 | return 0; | |
896 | ||
897 | /* Does this device able to configure which video head to be POSTed ? */ | |
898 | if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_VPO", &h_dummy1)) && | |
899 | ACPI_SUCCESS(acpi_get_handle(device->handle, "_GPD", &h_dummy2)) && | |
900 | ACPI_SUCCESS(acpi_get_handle(device->handle, "_SPD", &h_dummy3))) | |
901 | return 0; | |
902 | ||
903 | return -ENODEV; | |
904 | } | |
905 | ||
54735266 ZR |
906 | /* |
907 | * acpi_bay_match - see if a device is an ejectable driver bay | |
908 | * | |
909 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
910 | * then we can safely call it an ejectable drive bay | |
911 | */ | |
912 | static int acpi_bay_match(struct acpi_device *device){ | |
913 | acpi_status status; | |
914 | acpi_handle handle; | |
915 | acpi_handle tmp; | |
916 | acpi_handle phandle; | |
917 | ||
918 | handle = device->handle; | |
919 | ||
920 | status = acpi_get_handle(handle, "_EJ0", &tmp); | |
921 | if (ACPI_FAILURE(status)) | |
922 | return -ENODEV; | |
923 | ||
924 | if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || | |
925 | (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || | |
926 | (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || | |
927 | (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) | |
928 | return 0; | |
929 | ||
930 | if (acpi_get_parent(handle, &phandle)) | |
931 | return -ENODEV; | |
932 | ||
933 | if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) || | |
934 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) || | |
935 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) || | |
936 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp)))) | |
937 | return 0; | |
938 | ||
939 | return -ENODEV; | |
940 | } | |
941 | ||
4be44fcd LB |
942 | static void acpi_device_set_id(struct acpi_device *device, |
943 | struct acpi_device *parent, acpi_handle handle, | |
944 | int type) | |
1da177e4 | 945 | { |
4be44fcd LB |
946 | struct acpi_device_info *info; |
947 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
948 | char *hid = NULL; | |
949 | char *uid = NULL; | |
1da177e4 | 950 | struct acpi_compatible_id_list *cid_list = NULL; |
4be44fcd | 951 | acpi_status status; |
1da177e4 LT |
952 | |
953 | switch (type) { | |
954 | case ACPI_BUS_TYPE_DEVICE: | |
955 | status = acpi_get_object_info(handle, &buffer); | |
956 | if (ACPI_FAILURE(status)) { | |
4be44fcd | 957 | printk("%s: Error reading device info\n", __FUNCTION__); |
1da177e4 LT |
958 | return; |
959 | } | |
960 | ||
961 | info = buffer.pointer; | |
962 | if (info->valid & ACPI_VALID_HID) | |
963 | hid = info->hardware_id.value; | |
964 | if (info->valid & ACPI_VALID_UID) | |
965 | uid = info->unique_id.value; | |
966 | if (info->valid & ACPI_VALID_CID) | |
967 | cid_list = &info->compatibility_id; | |
968 | if (info->valid & ACPI_VALID_ADR) { | |
969 | device->pnp.bus_address = info->address; | |
970 | device->flags.bus_address = 1; | |
971 | } | |
ae843332 ZR |
972 | |
973 | if(!(info->valid & (ACPI_VALID_HID | ACPI_VALID_CID))){ | |
974 | status = acpi_video_bus_match(device); | |
975 | if(ACPI_SUCCESS(status)) | |
976 | hid = ACPI_VIDEO_HID; | |
54735266 ZR |
977 | |
978 | status = acpi_bay_match(device); | |
979 | if (ACPI_SUCCESS(status)) | |
980 | hid = ACPI_BAY_HID; | |
ae843332 | 981 | } |
1da177e4 LT |
982 | break; |
983 | case ACPI_BUS_TYPE_POWER: | |
984 | hid = ACPI_POWER_HID; | |
985 | break; | |
986 | case ACPI_BUS_TYPE_PROCESSOR: | |
987 | hid = ACPI_PROCESSOR_HID; | |
988 | break; | |
989 | case ACPI_BUS_TYPE_SYSTEM: | |
990 | hid = ACPI_SYSTEM_HID; | |
991 | break; | |
992 | case ACPI_BUS_TYPE_THERMAL: | |
993 | hid = ACPI_THERMAL_HID; | |
994 | break; | |
995 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
996 | hid = ACPI_BUTTON_HID_POWERF; | |
997 | break; | |
998 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
999 | hid = ACPI_BUTTON_HID_SLEEPF; | |
1000 | break; | |
1001 | } | |
1002 | ||
1003 | /* | |
1004 | * \_SB | |
1005 | * ---- | |
1006 | * Fix for the system root bus device -- the only root-level device. | |
1007 | */ | |
c51a4de8 | 1008 | if (((acpi_handle)parent == ACPI_ROOT_OBJECT) && (type == ACPI_BUS_TYPE_DEVICE)) { |
1da177e4 LT |
1009 | hid = ACPI_BUS_HID; |
1010 | strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME); | |
1011 | strcpy(device->pnp.device_class, ACPI_BUS_CLASS); | |
1012 | } | |
1013 | ||
1014 | if (hid) { | |
1015 | strcpy(device->pnp.hardware_id, hid); | |
1016 | device->flags.hardware_id = 1; | |
1017 | } | |
1018 | if (uid) { | |
1019 | strcpy(device->pnp.unique_id, uid); | |
1020 | device->flags.unique_id = 1; | |
1021 | } | |
1022 | if (cid_list) { | |
1023 | device->pnp.cid_list = kmalloc(cid_list->size, GFP_KERNEL); | |
1024 | if (device->pnp.cid_list) | |
1025 | memcpy(device->pnp.cid_list, cid_list, cid_list->size); | |
1026 | else | |
1027 | printk(KERN_ERR "Memory allocation error\n"); | |
1028 | } | |
1029 | ||
02438d87 | 1030 | kfree(buffer.pointer); |
1da177e4 LT |
1031 | } |
1032 | ||
4be44fcd | 1033 | static int acpi_device_set_context(struct acpi_device *device, int type) |
1da177e4 LT |
1034 | { |
1035 | acpi_status status = AE_OK; | |
1036 | int result = 0; | |
1037 | /* | |
1038 | * Context | |
1039 | * ------- | |
1040 | * Attach this 'struct acpi_device' to the ACPI object. This makes | |
1041 | * resolutions from handle->device very efficient. Note that we need | |
1042 | * to be careful with fixed-feature devices as they all attach to the | |
1043 | * root object. | |
1044 | */ | |
4be44fcd | 1045 | if (type != ACPI_BUS_TYPE_POWER_BUTTON && |
1da177e4 LT |
1046 | type != ACPI_BUS_TYPE_SLEEP_BUTTON) { |
1047 | status = acpi_attach_data(device->handle, | |
4be44fcd | 1048 | acpi_bus_data_handler, device); |
1da177e4 LT |
1049 | |
1050 | if (ACPI_FAILURE(status)) { | |
1051 | printk("Error attaching device data\n"); | |
1052 | result = -ENODEV; | |
1053 | } | |
1054 | } | |
1055 | return result; | |
1056 | } | |
1057 | ||
4be44fcd | 1058 | static int acpi_bus_remove(struct acpi_device *dev, int rmdevice) |
1da177e4 | 1059 | { |
1da177e4 | 1060 | if (!dev) |
d550d98d | 1061 | return -EINVAL; |
1da177e4 | 1062 | |
96333578 | 1063 | dev->removal_type = ACPI_BUS_REMOVAL_EJECT; |
1890a97a | 1064 | device_release_driver(&dev->dev); |
1da177e4 LT |
1065 | |
1066 | if (!rmdevice) | |
d550d98d | 1067 | return 0; |
1da177e4 | 1068 | |
2786f6e3 RZ |
1069 | /* |
1070 | * unbind _ADR-Based Devices when hot removal | |
1071 | */ | |
1da177e4 LT |
1072 | if (dev->flags.bus_address) { |
1073 | if ((dev->parent) && (dev->parent->ops.unbind)) | |
1074 | dev->parent->ops.unbind(dev); | |
1075 | } | |
1da177e4 LT |
1076 | acpi_device_unregister(dev, ACPI_BUS_REMOVAL_EJECT); |
1077 | ||
d550d98d | 1078 | return 0; |
1da177e4 LT |
1079 | } |
1080 | ||
3fb02738 | 1081 | static int |
4be44fcd | 1082 | acpi_add_single_object(struct acpi_device **child, |
c4168bff LS |
1083 | struct acpi_device *parent, acpi_handle handle, int type, |
1084 | struct acpi_bus_ops *ops) | |
1da177e4 | 1085 | { |
4be44fcd LB |
1086 | int result = 0; |
1087 | struct acpi_device *device = NULL; | |
1da177e4 | 1088 | |
1da177e4 LT |
1089 | |
1090 | if (!child) | |
d550d98d | 1091 | return -EINVAL; |
1da177e4 | 1092 | |
36bcbec7 | 1093 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 1094 | if (!device) { |
6468463a | 1095 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 1096 | return -ENOMEM; |
1da177e4 | 1097 | } |
1da177e4 LT |
1098 | |
1099 | device->handle = handle; | |
1100 | device->parent = parent; | |
c4168bff LS |
1101 | device->bus_ops = *ops; /* workround for not call .start */ |
1102 | ||
1da177e4 | 1103 | |
4be44fcd | 1104 | acpi_device_get_busid(device, handle, type); |
1da177e4 LT |
1105 | |
1106 | /* | |
1107 | * Flags | |
1108 | * ----- | |
1109 | * Get prior to calling acpi_bus_get_status() so we know whether | |
1110 | * or not _STA is present. Note that we only look for object | |
1111 | * handles -- cannot evaluate objects until we know the device is | |
1112 | * present and properly initialized. | |
1113 | */ | |
1114 | result = acpi_bus_get_flags(device); | |
1115 | if (result) | |
1116 | goto end; | |
1117 | ||
1118 | /* | |
1119 | * Status | |
1120 | * ------ | |
6940faba KT |
1121 | * See if the device is present. We always assume that non-Device |
1122 | * and non-Processor objects (e.g. thermal zones, power resources, | |
1123 | * etc.) are present, functioning, etc. (at least when parent object | |
1124 | * is present). Note that _STA has a different meaning for some | |
1125 | * objects (e.g. power resources) so we need to be careful how we use | |
1126 | * it. | |
1da177e4 LT |
1127 | */ |
1128 | switch (type) { | |
6940faba | 1129 | case ACPI_BUS_TYPE_PROCESSOR: |
1da177e4 LT |
1130 | case ACPI_BUS_TYPE_DEVICE: |
1131 | result = acpi_bus_get_status(device); | |
1132 | if (ACPI_FAILURE(result) || !device->status.present) { | |
1133 | result = -ENOENT; | |
1134 | goto end; | |
1135 | } | |
1136 | break; | |
1137 | default: | |
0c0e8921 BH |
1138 | STRUCT_TO_INT(device->status) = |
1139 | ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | | |
1140 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; | |
1da177e4 LT |
1141 | break; |
1142 | } | |
1143 | ||
1144 | /* | |
1145 | * Initialize Device | |
1146 | * ----------------- | |
1147 | * TBD: Synch with Core's enumeration/initialization process. | |
1148 | */ | |
1149 | ||
1150 | /* | |
1151 | * Hardware ID, Unique ID, & Bus Address | |
1152 | * ------------------------------------- | |
1153 | */ | |
4be44fcd | 1154 | acpi_device_set_id(device, parent, handle, type); |
1da177e4 LT |
1155 | |
1156 | /* | |
1157 | * Power Management | |
1158 | * ---------------- | |
1159 | */ | |
1160 | if (device->flags.power_manageable) { | |
1161 | result = acpi_bus_get_power_flags(device); | |
1162 | if (result) | |
1163 | goto end; | |
1164 | } | |
1165 | ||
4be44fcd | 1166 | /* |
1da177e4 LT |
1167 | * Wakeup device management |
1168 | *----------------------- | |
1169 | */ | |
1170 | if (device->flags.wake_capable) { | |
1171 | result = acpi_bus_get_wakeup_device_flags(device); | |
1172 | if (result) | |
1173 | goto end; | |
1174 | } | |
1175 | ||
1176 | /* | |
1177 | * Performance Management | |
1178 | * ---------------------- | |
1179 | */ | |
1180 | if (device->flags.performance_manageable) { | |
1181 | result = acpi_bus_get_perf_flags(device); | |
1182 | if (result) | |
1183 | goto end; | |
1184 | } | |
1185 | ||
4be44fcd | 1186 | if ((result = acpi_device_set_context(device, type))) |
1da177e4 LT |
1187 | goto end; |
1188 | ||
e49bd2dd | 1189 | result = acpi_device_register(device, parent); |
1da177e4 LT |
1190 | |
1191 | /* | |
2786f6e3 | 1192 | * Bind _ADR-Based Devices when hot add |
1da177e4 LT |
1193 | */ |
1194 | if (device->flags.bus_address) { | |
1195 | if (device->parent && device->parent->ops.bind) | |
1196 | device->parent->ops.bind(device); | |
1197 | } | |
1198 | ||
4be44fcd | 1199 | end: |
1da177e4 LT |
1200 | if (!result) |
1201 | *child = device; | |
1202 | else { | |
6044ec88 | 1203 | kfree(device->pnp.cid_list); |
1da177e4 LT |
1204 | kfree(device); |
1205 | } | |
1206 | ||
d550d98d | 1207 | return result; |
1da177e4 | 1208 | } |
1da177e4 | 1209 | |
4be44fcd | 1210 | static int acpi_bus_scan(struct acpi_device *start, struct acpi_bus_ops *ops) |
1da177e4 | 1211 | { |
4be44fcd LB |
1212 | acpi_status status = AE_OK; |
1213 | struct acpi_device *parent = NULL; | |
1214 | struct acpi_device *child = NULL; | |
1215 | acpi_handle phandle = NULL; | |
1216 | acpi_handle chandle = NULL; | |
1217 | acpi_object_type type = 0; | |
1218 | u32 level = 1; | |
1da177e4 | 1219 | |
1da177e4 LT |
1220 | |
1221 | if (!start) | |
d550d98d | 1222 | return -EINVAL; |
1da177e4 LT |
1223 | |
1224 | parent = start; | |
1225 | phandle = start->handle; | |
4be44fcd | 1226 | |
1da177e4 LT |
1227 | /* |
1228 | * Parse through the ACPI namespace, identify all 'devices', and | |
1229 | * create a new 'struct acpi_device' for each. | |
1230 | */ | |
1231 | while ((level > 0) && parent) { | |
1232 | ||
1233 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, | |
4be44fcd | 1234 | chandle, &chandle); |
1da177e4 LT |
1235 | |
1236 | /* | |
1237 | * If this scope is exhausted then move our way back up. | |
1238 | */ | |
1239 | if (ACPI_FAILURE(status)) { | |
1240 | level--; | |
1241 | chandle = phandle; | |
1242 | acpi_get_parent(phandle, &phandle); | |
1243 | if (parent->parent) | |
1244 | parent = parent->parent; | |
1245 | continue; | |
1246 | } | |
1247 | ||
1248 | status = acpi_get_type(chandle, &type); | |
1249 | if (ACPI_FAILURE(status)) | |
1250 | continue; | |
1251 | ||
1252 | /* | |
1253 | * If this is a scope object then parse it (depth-first). | |
1254 | */ | |
1255 | if (type == ACPI_TYPE_LOCAL_SCOPE) { | |
1256 | level++; | |
1257 | phandle = chandle; | |
1258 | chandle = NULL; | |
1259 | continue; | |
1260 | } | |
1261 | ||
1262 | /* | |
1263 | * We're only interested in objects that we consider 'devices'. | |
1264 | */ | |
1265 | switch (type) { | |
1266 | case ACPI_TYPE_DEVICE: | |
1267 | type = ACPI_BUS_TYPE_DEVICE; | |
1268 | break; | |
1269 | case ACPI_TYPE_PROCESSOR: | |
1270 | type = ACPI_BUS_TYPE_PROCESSOR; | |
1271 | break; | |
1272 | case ACPI_TYPE_THERMAL: | |
1273 | type = ACPI_BUS_TYPE_THERMAL; | |
1274 | break; | |
1275 | case ACPI_TYPE_POWER: | |
1276 | type = ACPI_BUS_TYPE_POWER; | |
1277 | break; | |
1278 | default: | |
1279 | continue; | |
1280 | } | |
1281 | ||
3fb02738 RS |
1282 | if (ops->acpi_op_add) |
1283 | status = acpi_add_single_object(&child, parent, | |
c4168bff | 1284 | chandle, type, ops); |
4be44fcd | 1285 | else |
3fb02738 RS |
1286 | status = acpi_bus_get_device(chandle, &child); |
1287 | ||
4be44fcd LB |
1288 | if (ACPI_FAILURE(status)) |
1289 | continue; | |
3fb02738 | 1290 | |
c4168bff | 1291 | if (ops->acpi_op_start && !(ops->acpi_op_add)) { |
3fb02738 RS |
1292 | status = acpi_start_single_object(child); |
1293 | if (ACPI_FAILURE(status)) | |
1294 | continue; | |
1295 | } | |
1da177e4 LT |
1296 | |
1297 | /* | |
1298 | * If the device is present, enabled, and functioning then | |
1299 | * parse its scope (depth-first). Note that we need to | |
1300 | * represent absent devices to facilitate PnP notifications | |
1301 | * -- but only the subtree head (not all of its children, | |
1302 | * which will be enumerated when the parent is inserted). | |
1303 | * | |
1304 | * TBD: Need notifications and other detection mechanisms | |
4be44fcd | 1305 | * in place before we can fully implement this. |
1da177e4 LT |
1306 | */ |
1307 | if (child->status.present) { | |
1308 | status = acpi_get_next_object(ACPI_TYPE_ANY, chandle, | |
1309 | NULL, NULL); | |
1310 | if (ACPI_SUCCESS(status)) { | |
1311 | level++; | |
1312 | phandle = chandle; | |
1313 | chandle = NULL; | |
1314 | parent = child; | |
1315 | } | |
1316 | } | |
1317 | } | |
1318 | ||
d550d98d | 1319 | return 0; |
1da177e4 | 1320 | } |
1da177e4 | 1321 | |
3fb02738 | 1322 | int |
4be44fcd LB |
1323 | acpi_bus_add(struct acpi_device **child, |
1324 | struct acpi_device *parent, acpi_handle handle, int type) | |
3fb02738 RS |
1325 | { |
1326 | int result; | |
1327 | struct acpi_bus_ops ops; | |
1328 | ||
c4168bff LS |
1329 | memset(&ops, 0, sizeof(ops)); |
1330 | ops.acpi_op_add = 1; | |
3fb02738 | 1331 | |
c4168bff LS |
1332 | result = acpi_add_single_object(child, parent, handle, type, &ops); |
1333 | if (!result) | |
3fb02738 | 1334 | result = acpi_bus_scan(*child, &ops); |
c4168bff | 1335 | |
d550d98d | 1336 | return result; |
3fb02738 | 1337 | } |
4be44fcd | 1338 | |
3fb02738 RS |
1339 | EXPORT_SYMBOL(acpi_bus_add); |
1340 | ||
4be44fcd | 1341 | int acpi_bus_start(struct acpi_device *device) |
3fb02738 RS |
1342 | { |
1343 | int result; | |
1344 | struct acpi_bus_ops ops; | |
1345 | ||
3fb02738 RS |
1346 | |
1347 | if (!device) | |
d550d98d | 1348 | return -EINVAL; |
3fb02738 RS |
1349 | |
1350 | result = acpi_start_single_object(device); | |
1351 | if (!result) { | |
1352 | memset(&ops, 0, sizeof(ops)); | |
1353 | ops.acpi_op_start = 1; | |
1354 | result = acpi_bus_scan(device, &ops); | |
1355 | } | |
d550d98d | 1356 | return result; |
3fb02738 | 1357 | } |
4be44fcd | 1358 | |
3fb02738 | 1359 | EXPORT_SYMBOL(acpi_bus_start); |
1da177e4 | 1360 | |
ceaba663 | 1361 | int acpi_bus_trim(struct acpi_device *start, int rmdevice) |
1da177e4 | 1362 | { |
4be44fcd LB |
1363 | acpi_status status; |
1364 | struct acpi_device *parent, *child; | |
1365 | acpi_handle phandle, chandle; | |
1366 | acpi_object_type type; | |
1367 | u32 level = 1; | |
1368 | int err = 0; | |
1369 | ||
1370 | parent = start; | |
1da177e4 LT |
1371 | phandle = start->handle; |
1372 | child = chandle = NULL; | |
1373 | ||
1374 | while ((level > 0) && parent && (!err)) { | |
1375 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, | |
4be44fcd | 1376 | chandle, &chandle); |
1da177e4 LT |
1377 | |
1378 | /* | |
1379 | * If this scope is exhausted then move our way back up. | |
1380 | */ | |
1381 | if (ACPI_FAILURE(status)) { | |
1382 | level--; | |
1383 | chandle = phandle; | |
1384 | acpi_get_parent(phandle, &phandle); | |
1385 | child = parent; | |
1386 | parent = parent->parent; | |
1387 | ||
1388 | if (level == 0) | |
1389 | err = acpi_bus_remove(child, rmdevice); | |
1390 | else | |
1391 | err = acpi_bus_remove(child, 1); | |
1392 | ||
1393 | continue; | |
1394 | } | |
1395 | ||
1396 | status = acpi_get_type(chandle, &type); | |
1397 | if (ACPI_FAILURE(status)) { | |
1398 | continue; | |
1399 | } | |
1400 | /* | |
1401 | * If there is a device corresponding to chandle then | |
1402 | * parse it (depth-first). | |
1403 | */ | |
1404 | if (acpi_bus_get_device(chandle, &child) == 0) { | |
1405 | level++; | |
1406 | phandle = chandle; | |
1407 | chandle = NULL; | |
1408 | parent = child; | |
1409 | } | |
1410 | continue; | |
1411 | } | |
1412 | return err; | |
1413 | } | |
ceaba663 KA |
1414 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
1415 | ||
1da177e4 | 1416 | |
4be44fcd | 1417 | static int acpi_bus_scan_fixed(struct acpi_device *root) |
1da177e4 | 1418 | { |
4be44fcd LB |
1419 | int result = 0; |
1420 | struct acpi_device *device = NULL; | |
c4168bff | 1421 | struct acpi_bus_ops ops; |
1da177e4 LT |
1422 | |
1423 | if (!root) | |
d550d98d | 1424 | return -ENODEV; |
1da177e4 | 1425 | |
c4168bff LS |
1426 | memset(&ops, 0, sizeof(ops)); |
1427 | ops.acpi_op_add = 1; | |
1428 | ops.acpi_op_start = 1; | |
1429 | ||
1da177e4 LT |
1430 | /* |
1431 | * Enumerate all fixed-feature devices. | |
1432 | */ | |
cee324b1 | 1433 | if ((acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON) == 0) { |
3fb02738 | 1434 | result = acpi_add_single_object(&device, acpi_root, |
4be44fcd | 1435 | NULL, |
c4168bff LS |
1436 | ACPI_BUS_TYPE_POWER_BUTTON, |
1437 | &ops); | |
3fb02738 | 1438 | } |
1da177e4 | 1439 | |
cee324b1 | 1440 | if ((acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON) == 0) { |
3fb02738 | 1441 | result = acpi_add_single_object(&device, acpi_root, |
4be44fcd | 1442 | NULL, |
c4168bff LS |
1443 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
1444 | &ops); | |
3fb02738 | 1445 | } |
1da177e4 | 1446 | |
d550d98d | 1447 | return result; |
1da177e4 LT |
1448 | } |
1449 | ||
1da177e4 LT |
1450 | static int __init acpi_scan_init(void) |
1451 | { | |
1452 | int result; | |
3fb02738 | 1453 | struct acpi_bus_ops ops; |
1da177e4 | 1454 | |
1da177e4 LT |
1455 | |
1456 | if (acpi_disabled) | |
d550d98d | 1457 | return 0; |
1da177e4 | 1458 | |
c4168bff LS |
1459 | memset(&ops, 0, sizeof(ops)); |
1460 | ops.acpi_op_add = 1; | |
1461 | ops.acpi_op_start = 1; | |
1da177e4 | 1462 | |
5b327265 PM |
1463 | result = bus_register(&acpi_bus_type); |
1464 | if (result) { | |
1465 | /* We don't want to quit even if we failed to add suspend/resume */ | |
1466 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
1467 | } | |
1468 | ||
1da177e4 LT |
1469 | /* |
1470 | * Create the root device in the bus's device tree | |
1471 | */ | |
3fb02738 | 1472 | result = acpi_add_single_object(&acpi_root, NULL, ACPI_ROOT_OBJECT, |
c4168bff | 1473 | ACPI_BUS_TYPE_SYSTEM, &ops); |
1da177e4 LT |
1474 | if (result) |
1475 | goto Done; | |
1476 | ||
1477 | /* | |
1478 | * Enumerate devices in the ACPI namespace. | |
1479 | */ | |
1480 | result = acpi_bus_scan_fixed(acpi_root); | |
c4168bff | 1481 | if (!result) |
3fb02738 | 1482 | result = acpi_bus_scan(acpi_root, &ops); |
1da177e4 LT |
1483 | |
1484 | if (result) | |
1485 | acpi_device_unregister(acpi_root, ACPI_BUS_REMOVAL_NORMAL); | |
1486 | ||
4be44fcd | 1487 | Done: |
d550d98d | 1488 | return result; |
1da177e4 LT |
1489 | } |
1490 | ||
1491 | subsys_initcall(acpi_scan_init); |