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1da177e4 LT |
1 | /* |
2 | * acpi_bus.c - ACPI Bus Driver ($Revision: 80 $) | |
3 | * | |
4 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
5 | * | |
6 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or (at | |
11 | * your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License along | |
19 | * with this program; if not, write to the Free Software Foundation, Inc., | |
20 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
21 | * | |
22 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
23 | */ | |
24 | ||
25 | #include <linux/module.h> | |
26 | #include <linux/init.h> | |
27 | #include <linux/ioport.h> | |
d568df84 | 28 | #include <linux/kernel.h> |
1da177e4 LT |
29 | #include <linux/list.h> |
30 | #include <linux/sched.h> | |
31 | #include <linux/pm.h> | |
32 | #include <linux/device.h> | |
33 | #include <linux/proc_fs.h> | |
6697c052 | 34 | #include <linux/acpi.h> |
1da177e4 LT |
35 | #ifdef CONFIG_X86 |
36 | #include <asm/mpspec.h> | |
37 | #endif | |
7752d5cf | 38 | #include <linux/pci.h> |
1da177e4 LT |
39 | #include <acpi/acpi_bus.h> |
40 | #include <acpi/acpi_drivers.h> | |
41 | ||
1da177e4 | 42 | #define _COMPONENT ACPI_BUS_COMPONENT |
f52fd66d | 43 | ACPI_MODULE_NAME("bus"); |
1da177e4 | 44 | |
4be44fcd LB |
45 | struct acpi_device *acpi_root; |
46 | struct proc_dir_entry *acpi_root_dir; | |
1da177e4 LT |
47 | EXPORT_SYMBOL(acpi_root_dir); |
48 | ||
49 | #define STRUCT_TO_INT(s) (*((int*)&s)) | |
50 | ||
51 | /* -------------------------------------------------------------------------- | |
52 | Device Management | |
53 | -------------------------------------------------------------------------- */ | |
54 | ||
4be44fcd | 55 | int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device) |
1da177e4 | 56 | { |
4be44fcd | 57 | acpi_status status = AE_OK; |
1da177e4 | 58 | |
1da177e4 LT |
59 | |
60 | if (!device) | |
d550d98d | 61 | return -EINVAL; |
1da177e4 LT |
62 | |
63 | /* TBD: Support fixed-feature devices */ | |
64 | ||
4be44fcd | 65 | status = acpi_get_data(handle, acpi_bus_data_handler, (void **)device); |
1da177e4 | 66 | if (ACPI_FAILURE(status) || !*device) { |
9805cb76 LB |
67 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", |
68 | handle)); | |
d550d98d | 69 | return -ENODEV; |
1da177e4 LT |
70 | } |
71 | ||
d550d98d | 72 | return 0; |
1da177e4 | 73 | } |
4be44fcd | 74 | |
1da177e4 LT |
75 | EXPORT_SYMBOL(acpi_bus_get_device); |
76 | ||
4be44fcd | 77 | int acpi_bus_get_status(struct acpi_device *device) |
1da177e4 | 78 | { |
4be44fcd LB |
79 | acpi_status status = AE_OK; |
80 | unsigned long sta = 0; | |
81 | ||
1da177e4 LT |
82 | |
83 | if (!device) | |
d550d98d | 84 | return -EINVAL; |
1da177e4 LT |
85 | |
86 | /* | |
87 | * Evaluate _STA if present. | |
88 | */ | |
89 | if (device->flags.dynamic_status) { | |
4be44fcd LB |
90 | status = |
91 | acpi_evaluate_integer(device->handle, "_STA", NULL, &sta); | |
1da177e4 | 92 | if (ACPI_FAILURE(status)) |
d550d98d | 93 | return -ENODEV; |
4be44fcd | 94 | STRUCT_TO_INT(device->status) = (int)sta; |
1da177e4 LT |
95 | } |
96 | ||
97 | /* | |
98 | * Otherwise we assume the status of our parent (unless we don't | |
99 | * have one, in which case status is implied). | |
100 | */ | |
101 | else if (device->parent) | |
102 | device->status = device->parent->status; | |
103 | else | |
0c0e8921 BH |
104 | STRUCT_TO_INT(device->status) = |
105 | ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | | |
106 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; | |
1da177e4 LT |
107 | |
108 | if (device->status.functional && !device->status.present) { | |
109 | printk(KERN_WARNING PREFIX "Device [%s] status [%08x]: " | |
4be44fcd LB |
110 | "functional but not present; setting present\n", |
111 | device->pnp.bus_id, (u32) STRUCT_TO_INT(device->status)); | |
1da177e4 LT |
112 | device->status.present = 1; |
113 | } | |
114 | ||
4be44fcd LB |
115 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n", |
116 | device->pnp.bus_id, | |
117 | (u32) STRUCT_TO_INT(device->status))); | |
1da177e4 | 118 | |
d550d98d | 119 | return 0; |
1da177e4 | 120 | } |
1da177e4 | 121 | |
4be44fcd | 122 | EXPORT_SYMBOL(acpi_bus_get_status); |
1da177e4 | 123 | |
20733939 ZR |
124 | void acpi_bus_private_data_handler(acpi_handle handle, |
125 | u32 function, void *context) | |
126 | { | |
127 | return; | |
128 | } | |
129 | EXPORT_SYMBOL(acpi_bus_private_data_handler); | |
130 | ||
131 | int acpi_bus_get_private_data(acpi_handle handle, void **data) | |
132 | { | |
133 | acpi_status status = AE_OK; | |
134 | ||
135 | if (!*data) | |
136 | return -EINVAL; | |
137 | ||
138 | status = acpi_get_data(handle, acpi_bus_private_data_handler, data); | |
139 | if (ACPI_FAILURE(status) || !*data) { | |
140 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", | |
141 | handle)); | |
142 | return -ENODEV; | |
143 | } | |
144 | ||
145 | return 0; | |
146 | } | |
147 | EXPORT_SYMBOL(acpi_bus_get_private_data); | |
148 | ||
1da177e4 LT |
149 | /* -------------------------------------------------------------------------- |
150 | Power Management | |
151 | -------------------------------------------------------------------------- */ | |
152 | ||
4be44fcd | 153 | int acpi_bus_get_power(acpi_handle handle, int *state) |
1da177e4 | 154 | { |
4be44fcd LB |
155 | int result = 0; |
156 | acpi_status status = 0; | |
157 | struct acpi_device *device = NULL; | |
158 | unsigned long psc = 0; | |
1da177e4 | 159 | |
1da177e4 LT |
160 | |
161 | result = acpi_bus_get_device(handle, &device); | |
162 | if (result) | |
d550d98d | 163 | return result; |
1da177e4 LT |
164 | |
165 | *state = ACPI_STATE_UNKNOWN; | |
166 | ||
167 | if (!device->flags.power_manageable) { | |
168 | /* TBD: Non-recursive algorithm for walking up hierarchy */ | |
169 | if (device->parent) | |
170 | *state = device->parent->power.state; | |
171 | else | |
172 | *state = ACPI_STATE_D0; | |
4be44fcd | 173 | } else { |
1da177e4 | 174 | /* |
aafbcd16 | 175 | * Get the device's power state either directly (via _PSC) or |
1da177e4 LT |
176 | * indirectly (via power resources). |
177 | */ | |
178 | if (device->power.flags.explicit_get) { | |
4be44fcd LB |
179 | status = acpi_evaluate_integer(device->handle, "_PSC", |
180 | NULL, &psc); | |
1da177e4 | 181 | if (ACPI_FAILURE(status)) |
d550d98d | 182 | return -ENODEV; |
4be44fcd LB |
183 | device->power.state = (int)psc; |
184 | } else if (device->power.flags.power_resources) { | |
1da177e4 LT |
185 | result = acpi_power_get_inferred_state(device); |
186 | if (result) | |
d550d98d | 187 | return result; |
1da177e4 LT |
188 | } |
189 | ||
190 | *state = device->power.state; | |
191 | } | |
192 | ||
193 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] power state is D%d\n", | |
4be44fcd | 194 | device->pnp.bus_id, device->power.state)); |
1da177e4 | 195 | |
d550d98d | 196 | return 0; |
1da177e4 | 197 | } |
1da177e4 | 198 | |
4be44fcd | 199 | EXPORT_SYMBOL(acpi_bus_get_power); |
1da177e4 | 200 | |
4be44fcd | 201 | int acpi_bus_set_power(acpi_handle handle, int state) |
1da177e4 | 202 | { |
4be44fcd LB |
203 | int result = 0; |
204 | acpi_status status = AE_OK; | |
205 | struct acpi_device *device = NULL; | |
206 | char object_name[5] = { '_', 'P', 'S', '0' + state, '\0' }; | |
1da177e4 | 207 | |
1da177e4 LT |
208 | |
209 | result = acpi_bus_get_device(handle, &device); | |
210 | if (result) | |
d550d98d | 211 | return result; |
1da177e4 LT |
212 | |
213 | if ((state < ACPI_STATE_D0) || (state > ACPI_STATE_D3)) | |
d550d98d | 214 | return -EINVAL; |
1da177e4 LT |
215 | |
216 | /* Make sure this is a valid target state */ | |
217 | ||
218 | if (!device->flags.power_manageable) { | |
9805cb76 | 219 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device `[%s]' is not power manageable\n", |
19c38de8 | 220 | kobject_name(&device->dev.kobj))); |
d550d98d | 221 | return -ENODEV; |
1da177e4 | 222 | } |
b913100d | 223 | /* |
c35923bc | 224 | * Get device's current power state |
b913100d | 225 | */ |
c35923bc | 226 | acpi_bus_get_power(device->handle, &device->power.state); |
ec68373c | 227 | if ((state == device->power.state) && !device->flags.force_power_state) { |
b1028c54 KK |
228 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n", |
229 | state)); | |
230 | return 0; | |
1da177e4 | 231 | } |
b1028c54 | 232 | |
1da177e4 | 233 | if (!device->power.states[state].flags.valid) { |
cece9296 | 234 | printk(KERN_WARNING PREFIX "Device does not support D%d\n", state); |
d550d98d | 235 | return -ENODEV; |
1da177e4 LT |
236 | } |
237 | if (device->parent && (state < device->parent->power.state)) { | |
cece9296 | 238 | printk(KERN_WARNING PREFIX |
a6fc6720 | 239 | "Cannot set device to a higher-powered" |
cece9296 | 240 | " state than parent\n"); |
d550d98d | 241 | return -ENODEV; |
1da177e4 LT |
242 | } |
243 | ||
244 | /* | |
245 | * Transition Power | |
246 | * ---------------- | |
247 | * On transitions to a high-powered state we first apply power (via | |
248 | * power resources) then evalute _PSx. Conversly for transitions to | |
249 | * a lower-powered state. | |
b913100d | 250 | */ |
1da177e4 LT |
251 | if (state < device->power.state) { |
252 | if (device->power.flags.power_resources) { | |
253 | result = acpi_power_transition(device, state); | |
254 | if (result) | |
255 | goto end; | |
256 | } | |
257 | if (device->power.states[state].flags.explicit_set) { | |
4be44fcd LB |
258 | status = acpi_evaluate_object(device->handle, |
259 | object_name, NULL, NULL); | |
1da177e4 LT |
260 | if (ACPI_FAILURE(status)) { |
261 | result = -ENODEV; | |
262 | goto end; | |
263 | } | |
264 | } | |
4be44fcd | 265 | } else { |
1da177e4 | 266 | if (device->power.states[state].flags.explicit_set) { |
4be44fcd LB |
267 | status = acpi_evaluate_object(device->handle, |
268 | object_name, NULL, NULL); | |
1da177e4 LT |
269 | if (ACPI_FAILURE(status)) { |
270 | result = -ENODEV; | |
271 | goto end; | |
272 | } | |
273 | } | |
274 | if (device->power.flags.power_resources) { | |
275 | result = acpi_power_transition(device, state); | |
276 | if (result) | |
277 | goto end; | |
278 | } | |
279 | } | |
280 | ||
4be44fcd | 281 | end: |
1da177e4 | 282 | if (result) |
cece9296 LB |
283 | printk(KERN_WARNING PREFIX |
284 | "Transitioning device [%s] to D%d\n", | |
285 | device->pnp.bus_id, state); | |
5e32132b SL |
286 | else { |
287 | device->power.state = state; | |
4be44fcd LB |
288 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
289 | "Device [%s] transitioned to D%d\n", | |
290 | device->pnp.bus_id, state)); | |
5e32132b | 291 | } |
1da177e4 | 292 | |
d550d98d | 293 | return result; |
1da177e4 | 294 | } |
1da177e4 | 295 | |
4be44fcd | 296 | EXPORT_SYMBOL(acpi_bus_set_power); |
1da177e4 | 297 | |
3737b2b1 RW |
298 | bool acpi_bus_power_manageable(acpi_handle handle) |
299 | { | |
300 | struct acpi_device *device; | |
301 | int result; | |
302 | ||
303 | result = acpi_bus_get_device(handle, &device); | |
304 | return result ? false : device->flags.power_manageable; | |
305 | } | |
306 | ||
307 | EXPORT_SYMBOL(acpi_bus_power_manageable); | |
308 | ||
eb9d0fe4 RW |
309 | bool acpi_bus_can_wakeup(acpi_handle handle) |
310 | { | |
311 | struct acpi_device *device; | |
312 | int result; | |
313 | ||
314 | result = acpi_bus_get_device(handle, &device); | |
315 | return result ? false : device->wakeup.flags.valid; | |
316 | } | |
317 | ||
318 | EXPORT_SYMBOL(acpi_bus_can_wakeup); | |
319 | ||
1da177e4 LT |
320 | /* -------------------------------------------------------------------------- |
321 | Event Management | |
322 | -------------------------------------------------------------------------- */ | |
323 | ||
14e04fb3 | 324 | #ifdef CONFIG_ACPI_PROC_EVENT |
1da177e4 LT |
325 | static DEFINE_SPINLOCK(acpi_bus_event_lock); |
326 | ||
327 | LIST_HEAD(acpi_bus_event_list); | |
328 | DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue); | |
329 | ||
4be44fcd | 330 | extern int event_is_open; |
1da177e4 | 331 | |
8db85d4c | 332 | int acpi_bus_generate_proc_event4(const char *device_class, const char *bus_id, u8 type, int data) |
1da177e4 | 333 | { |
8db85d4c | 334 | struct acpi_bus_event *event; |
4be44fcd | 335 | unsigned long flags = 0; |
1da177e4 | 336 | |
1da177e4 LT |
337 | /* drop event on the floor if no one's listening */ |
338 | if (!event_is_open) | |
d550d98d | 339 | return 0; |
1da177e4 LT |
340 | |
341 | event = kmalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC); | |
342 | if (!event) | |
d550d98d | 343 | return -ENOMEM; |
1da177e4 | 344 | |
8db85d4c AS |
345 | strcpy(event->device_class, device_class); |
346 | strcpy(event->bus_id, bus_id); | |
1da177e4 LT |
347 | event->type = type; |
348 | event->data = data; | |
349 | ||
350 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
351 | list_add_tail(&event->node, &acpi_bus_event_list); | |
352 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); | |
353 | ||
354 | wake_up_interruptible(&acpi_bus_event_queue); | |
355 | ||
d550d98d | 356 | return 0; |
8db85d4c AS |
357 | |
358 | } | |
359 | ||
360 | EXPORT_SYMBOL_GPL(acpi_bus_generate_proc_event4); | |
361 | ||
362 | int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data) | |
363 | { | |
364 | if (!device) | |
365 | return -EINVAL; | |
366 | return acpi_bus_generate_proc_event4(device->pnp.device_class, | |
367 | device->pnp.bus_id, type, data); | |
1da177e4 | 368 | } |
4be44fcd | 369 | |
14e04fb3 | 370 | EXPORT_SYMBOL(acpi_bus_generate_proc_event); |
1da177e4 | 371 | |
4be44fcd | 372 | int acpi_bus_receive_event(struct acpi_bus_event *event) |
1da177e4 | 373 | { |
4be44fcd LB |
374 | unsigned long flags = 0; |
375 | struct acpi_bus_event *entry = NULL; | |
1da177e4 LT |
376 | |
377 | DECLARE_WAITQUEUE(wait, current); | |
378 | ||
1da177e4 LT |
379 | |
380 | if (!event) | |
d550d98d | 381 | return -EINVAL; |
1da177e4 LT |
382 | |
383 | if (list_empty(&acpi_bus_event_list)) { | |
384 | ||
385 | set_current_state(TASK_INTERRUPTIBLE); | |
386 | add_wait_queue(&acpi_bus_event_queue, &wait); | |
387 | ||
388 | if (list_empty(&acpi_bus_event_list)) | |
389 | schedule(); | |
390 | ||
391 | remove_wait_queue(&acpi_bus_event_queue, &wait); | |
392 | set_current_state(TASK_RUNNING); | |
393 | ||
394 | if (signal_pending(current)) | |
d550d98d | 395 | return -ERESTARTSYS; |
1da177e4 LT |
396 | } |
397 | ||
398 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
f0a37e00 CE |
399 | if (!list_empty(&acpi_bus_event_list)) { |
400 | entry = list_entry(acpi_bus_event_list.next, | |
401 | struct acpi_bus_event, node); | |
1da177e4 | 402 | list_del(&entry->node); |
f0a37e00 | 403 | } |
1da177e4 LT |
404 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); |
405 | ||
406 | if (!entry) | |
d550d98d | 407 | return -ENODEV; |
1da177e4 LT |
408 | |
409 | memcpy(event, entry, sizeof(struct acpi_bus_event)); | |
410 | ||
411 | kfree(entry); | |
412 | ||
d550d98d | 413 | return 0; |
1da177e4 | 414 | } |
1da177e4 | 415 | |
14e04fb3 | 416 | #endif /* CONFIG_ACPI_PROC_EVENT */ |
1da177e4 LT |
417 | |
418 | /* -------------------------------------------------------------------------- | |
419 | Notification Handling | |
420 | -------------------------------------------------------------------------- */ | |
421 | ||
422 | static int | |
4be44fcd | 423 | acpi_bus_check_device(struct acpi_device *device, int *status_changed) |
1da177e4 | 424 | { |
4be44fcd | 425 | acpi_status status = 0; |
1da177e4 LT |
426 | struct acpi_device_status old_status; |
427 | ||
1da177e4 LT |
428 | |
429 | if (!device) | |
d550d98d | 430 | return -EINVAL; |
1da177e4 LT |
431 | |
432 | if (status_changed) | |
433 | *status_changed = 0; | |
434 | ||
435 | old_status = device->status; | |
436 | ||
437 | /* | |
438 | * Make sure this device's parent is present before we go about | |
439 | * messing with the device. | |
440 | */ | |
441 | if (device->parent && !device->parent->status.present) { | |
442 | device->status = device->parent->status; | |
443 | if (STRUCT_TO_INT(old_status) != STRUCT_TO_INT(device->status)) { | |
444 | if (status_changed) | |
445 | *status_changed = 1; | |
446 | } | |
d550d98d | 447 | return 0; |
1da177e4 LT |
448 | } |
449 | ||
450 | status = acpi_bus_get_status(device); | |
451 | if (ACPI_FAILURE(status)) | |
d550d98d | 452 | return -ENODEV; |
1da177e4 LT |
453 | |
454 | if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status)) | |
d550d98d | 455 | return 0; |
1da177e4 LT |
456 | |
457 | if (status_changed) | |
458 | *status_changed = 1; | |
4be44fcd | 459 | |
1da177e4 LT |
460 | /* |
461 | * Device Insertion/Removal | |
462 | */ | |
463 | if ((device->status.present) && !(old_status.present)) { | |
464 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n")); | |
465 | /* TBD: Handle device insertion */ | |
4be44fcd | 466 | } else if (!(device->status.present) && (old_status.present)) { |
1da177e4 LT |
467 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n")); |
468 | /* TBD: Handle device removal */ | |
469 | } | |
470 | ||
d550d98d | 471 | return 0; |
1da177e4 LT |
472 | } |
473 | ||
4be44fcd | 474 | static int acpi_bus_check_scope(struct acpi_device *device) |
1da177e4 | 475 | { |
4be44fcd LB |
476 | int result = 0; |
477 | int status_changed = 0; | |
1da177e4 | 478 | |
1da177e4 LT |
479 | |
480 | if (!device) | |
d550d98d | 481 | return -EINVAL; |
1da177e4 LT |
482 | |
483 | /* Status Change? */ | |
484 | result = acpi_bus_check_device(device, &status_changed); | |
485 | if (result) | |
d550d98d | 486 | return result; |
1da177e4 LT |
487 | |
488 | if (!status_changed) | |
d550d98d | 489 | return 0; |
1da177e4 LT |
490 | |
491 | /* | |
492 | * TBD: Enumerate child devices within this device's scope and | |
493 | * run acpi_bus_check_device()'s on them. | |
494 | */ | |
495 | ||
d550d98d | 496 | return 0; |
1da177e4 LT |
497 | } |
498 | ||
1da177e4 LT |
499 | /** |
500 | * acpi_bus_notify | |
501 | * --------------- | |
502 | * Callback for all 'system-level' device notifications (values 0x00-0x7F). | |
503 | */ | |
4be44fcd | 504 | static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) |
1da177e4 | 505 | { |
4be44fcd LB |
506 | int result = 0; |
507 | struct acpi_device *device = NULL; | |
1da177e4 | 508 | |
1da177e4 LT |
509 | |
510 | if (acpi_bus_get_device(handle, &device)) | |
d550d98d | 511 | return; |
1da177e4 LT |
512 | |
513 | switch (type) { | |
514 | ||
515 | case ACPI_NOTIFY_BUS_CHECK: | |
4be44fcd LB |
516 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
517 | "Received BUS CHECK notification for device [%s]\n", | |
518 | device->pnp.bus_id)); | |
1da177e4 | 519 | result = acpi_bus_check_scope(device); |
aafbcd16 | 520 | /* |
1da177e4 | 521 | * TBD: We'll need to outsource certain events to non-ACPI |
4be44fcd | 522 | * drivers via the device manager (device.c). |
1da177e4 LT |
523 | */ |
524 | break; | |
525 | ||
526 | case ACPI_NOTIFY_DEVICE_CHECK: | |
4be44fcd LB |
527 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
528 | "Received DEVICE CHECK notification for device [%s]\n", | |
529 | device->pnp.bus_id)); | |
1da177e4 | 530 | result = acpi_bus_check_device(device, NULL); |
aafbcd16 | 531 | /* |
1da177e4 | 532 | * TBD: We'll need to outsource certain events to non-ACPI |
4be44fcd | 533 | * drivers via the device manager (device.c). |
1da177e4 LT |
534 | */ |
535 | break; | |
536 | ||
537 | case ACPI_NOTIFY_DEVICE_WAKE: | |
4be44fcd LB |
538 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
539 | "Received DEVICE WAKE notification for device [%s]\n", | |
540 | device->pnp.bus_id)); | |
1da177e4 LT |
541 | /* TBD */ |
542 | break; | |
543 | ||
544 | case ACPI_NOTIFY_EJECT_REQUEST: | |
4be44fcd LB |
545 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
546 | "Received EJECT REQUEST notification for device [%s]\n", | |
547 | device->pnp.bus_id)); | |
1da177e4 LT |
548 | /* TBD */ |
549 | break; | |
550 | ||
551 | case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: | |
4be44fcd LB |
552 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
553 | "Received DEVICE CHECK LIGHT notification for device [%s]\n", | |
554 | device->pnp.bus_id)); | |
1da177e4 LT |
555 | /* TBD: Exactly what does 'light' mean? */ |
556 | break; | |
557 | ||
558 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
4be44fcd LB |
559 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
560 | "Received FREQUENCY MISMATCH notification for device [%s]\n", | |
561 | device->pnp.bus_id)); | |
1da177e4 LT |
562 | /* TBD */ |
563 | break; | |
564 | ||
565 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
4be44fcd LB |
566 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
567 | "Received BUS MODE MISMATCH notification for device [%s]\n", | |
568 | device->pnp.bus_id)); | |
1da177e4 LT |
569 | /* TBD */ |
570 | break; | |
571 | ||
572 | case ACPI_NOTIFY_POWER_FAULT: | |
4be44fcd LB |
573 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
574 | "Received POWER FAULT notification for device [%s]\n", | |
575 | device->pnp.bus_id)); | |
1da177e4 LT |
576 | /* TBD */ |
577 | break; | |
578 | ||
579 | default: | |
4be44fcd LB |
580 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
581 | "Received unknown/unsupported notification [%08x]\n", | |
582 | type)); | |
1da177e4 LT |
583 | break; |
584 | } | |
585 | ||
d550d98d | 586 | return; |
1da177e4 LT |
587 | } |
588 | ||
589 | /* -------------------------------------------------------------------------- | |
590 | Initialization/Cleanup | |
591 | -------------------------------------------------------------------------- */ | |
592 | ||
4be44fcd | 593 | static int __init acpi_bus_init_irq(void) |
1da177e4 | 594 | { |
4be44fcd LB |
595 | acpi_status status = AE_OK; |
596 | union acpi_object arg = { ACPI_TYPE_INTEGER }; | |
597 | struct acpi_object_list arg_list = { 1, &arg }; | |
598 | char *message = NULL; | |
1da177e4 | 599 | |
1da177e4 | 600 | |
aafbcd16 | 601 | /* |
1da177e4 LT |
602 | * Let the system know what interrupt model we are using by |
603 | * evaluating the \_PIC object, if exists. | |
604 | */ | |
605 | ||
606 | switch (acpi_irq_model) { | |
607 | case ACPI_IRQ_MODEL_PIC: | |
608 | message = "PIC"; | |
609 | break; | |
610 | case ACPI_IRQ_MODEL_IOAPIC: | |
611 | message = "IOAPIC"; | |
612 | break; | |
613 | case ACPI_IRQ_MODEL_IOSAPIC: | |
614 | message = "IOSAPIC"; | |
615 | break; | |
3948ec94 JK |
616 | case ACPI_IRQ_MODEL_PLATFORM: |
617 | message = "platform specific model"; | |
618 | break; | |
1da177e4 LT |
619 | default: |
620 | printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n"); | |
d550d98d | 621 | return -ENODEV; |
1da177e4 LT |
622 | } |
623 | ||
624 | printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message); | |
625 | ||
626 | arg.integer.value = acpi_irq_model; | |
627 | ||
628 | status = acpi_evaluate_object(NULL, "\\_PIC", &arg_list, NULL); | |
629 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { | |
a6fc6720 | 630 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC")); |
d550d98d | 631 | return -ENODEV; |
1da177e4 LT |
632 | } |
633 | ||
d550d98d | 634 | return 0; |
1da177e4 LT |
635 | } |
636 | ||
67a119f9 | 637 | u8 acpi_gbl_permanent_mmap; |
ad71860a AS |
638 | |
639 | ||
4be44fcd | 640 | void __init acpi_early_init(void) |
1da177e4 | 641 | { |
4be44fcd | 642 | acpi_status status = AE_OK; |
1da177e4 LT |
643 | |
644 | if (acpi_disabled) | |
d550d98d | 645 | return; |
1da177e4 | 646 | |
61686124 BM |
647 | printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION); |
648 | ||
1da177e4 LT |
649 | /* enable workarounds, unless strict ACPI spec. compliance */ |
650 | if (!acpi_strict) | |
651 | acpi_gbl_enable_interpreter_slack = TRUE; | |
652 | ||
ad71860a AS |
653 | acpi_gbl_permanent_mmap = 1; |
654 | ||
655 | status = acpi_reallocate_root_table(); | |
656 | if (ACPI_FAILURE(status)) { | |
657 | printk(KERN_ERR PREFIX | |
658 | "Unable to reallocate ACPI tables\n"); | |
659 | goto error0; | |
660 | } | |
661 | ||
1da177e4 LT |
662 | status = acpi_initialize_subsystem(); |
663 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
664 | printk(KERN_ERR PREFIX |
665 | "Unable to initialize the ACPI Interpreter\n"); | |
1da177e4 LT |
666 | goto error0; |
667 | } | |
668 | ||
669 | status = acpi_load_tables(); | |
670 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
671 | printk(KERN_ERR PREFIX |
672 | "Unable to load the System Description Tables\n"); | |
1da177e4 LT |
673 | goto error0; |
674 | } | |
675 | ||
1da177e4 LT |
676 | #ifdef CONFIG_X86 |
677 | if (!acpi_ioapic) { | |
1da177e4 | 678 | /* compatible (0) means level (3) */ |
5f3b1a8b AS |
679 | if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) { |
680 | acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK; | |
681 | acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL; | |
682 | } | |
1da177e4 | 683 | /* Set PIC-mode SCI trigger type */ |
cee324b1 | 684 | acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt, |
5f3b1a8b | 685 | (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2); |
1da177e4 | 686 | } else { |
1da177e4 | 687 | /* |
cee324b1 | 688 | * now that acpi_gbl_FADT is initialized, |
1da177e4 LT |
689 | * update it with result from INT_SRC_OVR parsing |
690 | */ | |
cee324b1 | 691 | acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi; |
1da177e4 LT |
692 | } |
693 | #endif | |
694 | ||
4be44fcd LB |
695 | status = |
696 | acpi_enable_subsystem(~ | |
697 | (ACPI_NO_HARDWARE_INIT | | |
698 | ACPI_NO_ACPI_ENABLE)); | |
1da177e4 LT |
699 | if (ACPI_FAILURE(status)) { |
700 | printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); | |
701 | goto error0; | |
702 | } | |
703 | ||
d550d98d | 704 | return; |
1da177e4 | 705 | |
4be44fcd | 706 | error0: |
1da177e4 | 707 | disable_acpi(); |
d550d98d | 708 | return; |
1da177e4 LT |
709 | } |
710 | ||
4be44fcd | 711 | static int __init acpi_bus_init(void) |
1da177e4 | 712 | { |
4be44fcd LB |
713 | int result = 0; |
714 | acpi_status status = AE_OK; | |
715 | extern acpi_status acpi_os_initialize1(void); | |
1da177e4 | 716 | |
1da177e4 LT |
717 | |
718 | status = acpi_os_initialize1(); | |
719 | ||
4be44fcd LB |
720 | status = |
721 | acpi_enable_subsystem(ACPI_NO_HARDWARE_INIT | ACPI_NO_ACPI_ENABLE); | |
1da177e4 | 722 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
723 | printk(KERN_ERR PREFIX |
724 | "Unable to start the ACPI Interpreter\n"); | |
1da177e4 LT |
725 | goto error1; |
726 | } | |
727 | ||
728 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
729 | printk(KERN_ERR PREFIX |
730 | "Unable to initialize ACPI OS objects\n"); | |
1da177e4 LT |
731 | goto error1; |
732 | } | |
733 | #ifdef CONFIG_ACPI_EC | |
734 | /* | |
735 | * ACPI 2.0 requires the EC driver to be loaded and work before | |
736 | * the EC device is found in the namespace (i.e. before acpi_initialize_objects() | |
737 | * is called). | |
738 | * | |
aafbcd16 | 739 | * This is accomplished by looking for the ECDT table, and getting |
1da177e4 LT |
740 | * the EC parameters out of that. |
741 | */ | |
742 | status = acpi_ec_ecdt_probe(); | |
743 | /* Ignore result. Not having an ECDT is not fatal. */ | |
744 | #endif | |
745 | ||
746 | status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); | |
747 | if (ACPI_FAILURE(status)) { | |
748 | printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); | |
749 | goto error1; | |
750 | } | |
751 | ||
752 | printk(KERN_INFO PREFIX "Interpreter enabled\n"); | |
753 | ||
aafbcd16 AS |
754 | /* Initialize sleep structures */ |
755 | acpi_sleep_init(); | |
756 | ||
1da177e4 LT |
757 | /* |
758 | * Get the system interrupt model and evaluate \_PIC. | |
759 | */ | |
760 | result = acpi_bus_init_irq(); | |
761 | if (result) | |
762 | goto error1; | |
763 | ||
764 | /* | |
765 | * Register the for all standard device notifications. | |
766 | */ | |
4be44fcd LB |
767 | status = |
768 | acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, | |
769 | &acpi_bus_notify, NULL); | |
1da177e4 | 770 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
771 | printk(KERN_ERR PREFIX |
772 | "Unable to register for device notifications\n"); | |
1da177e4 LT |
773 | goto error1; |
774 | } | |
775 | ||
776 | /* | |
777 | * Create the top ACPI proc directory | |
778 | */ | |
779 | acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); | |
780 | ||
d550d98d | 781 | return 0; |
1da177e4 LT |
782 | |
783 | /* Mimic structured exception handling */ | |
4be44fcd | 784 | error1: |
1da177e4 | 785 | acpi_terminate(); |
d550d98d | 786 | return -ENODEV; |
1da177e4 LT |
787 | } |
788 | ||
99e0d2fc | 789 | struct kobject *acpi_kobj; |
1da177e4 | 790 | |
4be44fcd | 791 | static int __init acpi_init(void) |
1da177e4 | 792 | { |
4be44fcd | 793 | int result = 0; |
1da177e4 | 794 | |
1da177e4 | 795 | |
1da177e4 LT |
796 | if (acpi_disabled) { |
797 | printk(KERN_INFO PREFIX "Interpreter disabled.\n"); | |
d550d98d | 798 | return -ENODEV; |
1da177e4 LT |
799 | } |
800 | ||
f62ed9e3 | 801 | acpi_kobj = kobject_create_and_add("acpi", firmware_kobj); |
99e0d2fc | 802 | if (!acpi_kobj) { |
96b2dd1f | 803 | printk(KERN_WARNING "%s: kset create error\n", __func__); |
99e0d2fc GKH |
804 | acpi_kobj = NULL; |
805 | } | |
1da177e4 LT |
806 | |
807 | result = acpi_bus_init(); | |
808 | ||
809 | if (!result) { | |
7752d5cf | 810 | pci_mmcfg_late_init(); |
9f9adecd LB |
811 | if (!(pm_flags & PM_APM)) |
812 | pm_flags |= PM_ACPI; | |
1da177e4 | 813 | else { |
4be44fcd LB |
814 | printk(KERN_INFO PREFIX |
815 | "APM is already active, exiting\n"); | |
1da177e4 LT |
816 | disable_acpi(); |
817 | result = -ENODEV; | |
818 | } | |
1da177e4 LT |
819 | } else |
820 | disable_acpi(); | |
821 | ||
d550d98d | 822 | return result; |
1da177e4 LT |
823 | } |
824 | ||
825 | subsys_initcall(acpi_init); |