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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> | |
34 | #ifdef CONFIG_X86 | |
35 | #include <asm/mpspec.h> | |
36 | #endif | |
37 | #include <acpi/acpi_bus.h> | |
38 | #include <acpi/acpi_drivers.h> | |
39 | ||
1da177e4 | 40 | #define _COMPONENT ACPI_BUS_COMPONENT |
f52fd66d | 41 | ACPI_MODULE_NAME("bus"); |
1da177e4 LT |
42 | #ifdef CONFIG_X86 |
43 | extern void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger); | |
44 | #endif | |
45 | ||
4be44fcd LB |
46 | struct acpi_device *acpi_root; |
47 | struct proc_dir_entry *acpi_root_dir; | |
1da177e4 LT |
48 | EXPORT_SYMBOL(acpi_root_dir); |
49 | ||
50 | #define STRUCT_TO_INT(s) (*((int*)&s)) | |
51 | ||
52 | /* -------------------------------------------------------------------------- | |
53 | Device Management | |
54 | -------------------------------------------------------------------------- */ | |
55 | ||
4be44fcd | 56 | int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device) |
1da177e4 | 57 | { |
4be44fcd | 58 | acpi_status status = AE_OK; |
1da177e4 | 59 | |
1da177e4 LT |
60 | |
61 | if (!device) | |
d550d98d | 62 | return -EINVAL; |
1da177e4 LT |
63 | |
64 | /* TBD: Support fixed-feature devices */ | |
65 | ||
4be44fcd | 66 | status = acpi_get_data(handle, acpi_bus_data_handler, (void **)device); |
1da177e4 | 67 | if (ACPI_FAILURE(status) || !*device) { |
9805cb76 LB |
68 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", |
69 | handle)); | |
d550d98d | 70 | return -ENODEV; |
1da177e4 LT |
71 | } |
72 | ||
d550d98d | 73 | return 0; |
1da177e4 | 74 | } |
4be44fcd | 75 | |
1da177e4 LT |
76 | EXPORT_SYMBOL(acpi_bus_get_device); |
77 | ||
4be44fcd | 78 | int acpi_bus_get_status(struct acpi_device *device) |
1da177e4 | 79 | { |
4be44fcd LB |
80 | acpi_status status = AE_OK; |
81 | unsigned long sta = 0; | |
82 | ||
1da177e4 LT |
83 | |
84 | if (!device) | |
d550d98d | 85 | return -EINVAL; |
1da177e4 LT |
86 | |
87 | /* | |
88 | * Evaluate _STA if present. | |
89 | */ | |
90 | if (device->flags.dynamic_status) { | |
4be44fcd LB |
91 | status = |
92 | acpi_evaluate_integer(device->handle, "_STA", NULL, &sta); | |
1da177e4 | 93 | if (ACPI_FAILURE(status)) |
d550d98d | 94 | return -ENODEV; |
4be44fcd | 95 | STRUCT_TO_INT(device->status) = (int)sta; |
1da177e4 LT |
96 | } |
97 | ||
98 | /* | |
99 | * Otherwise we assume the status of our parent (unless we don't | |
100 | * have one, in which case status is implied). | |
101 | */ | |
102 | else if (device->parent) | |
103 | device->status = device->parent->status; | |
104 | else | |
0c0e8921 BH |
105 | STRUCT_TO_INT(device->status) = |
106 | ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | | |
107 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; | |
1da177e4 LT |
108 | |
109 | if (device->status.functional && !device->status.present) { | |
110 | printk(KERN_WARNING PREFIX "Device [%s] status [%08x]: " | |
4be44fcd LB |
111 | "functional but not present; setting present\n", |
112 | device->pnp.bus_id, (u32) STRUCT_TO_INT(device->status)); | |
1da177e4 LT |
113 | device->status.present = 1; |
114 | } | |
115 | ||
4be44fcd LB |
116 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n", |
117 | device->pnp.bus_id, | |
118 | (u32) STRUCT_TO_INT(device->status))); | |
1da177e4 | 119 | |
d550d98d | 120 | return 0; |
1da177e4 | 121 | } |
1da177e4 | 122 | |
4be44fcd | 123 | EXPORT_SYMBOL(acpi_bus_get_status); |
1da177e4 | 124 | |
20733939 ZR |
125 | void acpi_bus_private_data_handler(acpi_handle handle, |
126 | u32 function, void *context) | |
127 | { | |
128 | return; | |
129 | } | |
130 | EXPORT_SYMBOL(acpi_bus_private_data_handler); | |
131 | ||
132 | int acpi_bus_get_private_data(acpi_handle handle, void **data) | |
133 | { | |
134 | acpi_status status = AE_OK; | |
135 | ||
136 | if (!*data) | |
137 | return -EINVAL; | |
138 | ||
139 | status = acpi_get_data(handle, acpi_bus_private_data_handler, data); | |
140 | if (ACPI_FAILURE(status) || !*data) { | |
141 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", | |
142 | handle)); | |
143 | return -ENODEV; | |
144 | } | |
145 | ||
146 | return 0; | |
147 | } | |
148 | EXPORT_SYMBOL(acpi_bus_get_private_data); | |
149 | ||
1da177e4 LT |
150 | /* -------------------------------------------------------------------------- |
151 | Power Management | |
152 | -------------------------------------------------------------------------- */ | |
153 | ||
4be44fcd | 154 | int acpi_bus_get_power(acpi_handle handle, int *state) |
1da177e4 | 155 | { |
4be44fcd LB |
156 | int result = 0; |
157 | acpi_status status = 0; | |
158 | struct acpi_device *device = NULL; | |
159 | unsigned long psc = 0; | |
1da177e4 | 160 | |
1da177e4 LT |
161 | |
162 | result = acpi_bus_get_device(handle, &device); | |
163 | if (result) | |
d550d98d | 164 | return result; |
1da177e4 LT |
165 | |
166 | *state = ACPI_STATE_UNKNOWN; | |
167 | ||
168 | if (!device->flags.power_manageable) { | |
169 | /* TBD: Non-recursive algorithm for walking up hierarchy */ | |
170 | if (device->parent) | |
171 | *state = device->parent->power.state; | |
172 | else | |
173 | *state = ACPI_STATE_D0; | |
4be44fcd | 174 | } else { |
1da177e4 | 175 | /* |
aafbcd16 | 176 | * Get the device's power state either directly (via _PSC) or |
1da177e4 LT |
177 | * indirectly (via power resources). |
178 | */ | |
179 | if (device->power.flags.explicit_get) { | |
4be44fcd LB |
180 | status = acpi_evaluate_integer(device->handle, "_PSC", |
181 | NULL, &psc); | |
1da177e4 | 182 | if (ACPI_FAILURE(status)) |
d550d98d | 183 | return -ENODEV; |
4be44fcd LB |
184 | device->power.state = (int)psc; |
185 | } else if (device->power.flags.power_resources) { | |
1da177e4 LT |
186 | result = acpi_power_get_inferred_state(device); |
187 | if (result) | |
d550d98d | 188 | return result; |
1da177e4 LT |
189 | } |
190 | ||
191 | *state = device->power.state; | |
192 | } | |
193 | ||
194 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] power state is D%d\n", | |
4be44fcd | 195 | device->pnp.bus_id, device->power.state)); |
1da177e4 | 196 | |
d550d98d | 197 | return 0; |
1da177e4 | 198 | } |
1da177e4 | 199 | |
4be44fcd | 200 | EXPORT_SYMBOL(acpi_bus_get_power); |
1da177e4 | 201 | |
4be44fcd | 202 | int acpi_bus_set_power(acpi_handle handle, int state) |
1da177e4 | 203 | { |
4be44fcd LB |
204 | int result = 0; |
205 | acpi_status status = AE_OK; | |
206 | struct acpi_device *device = NULL; | |
207 | char object_name[5] = { '_', 'P', 'S', '0' + state, '\0' }; | |
1da177e4 | 208 | |
1da177e4 LT |
209 | |
210 | result = acpi_bus_get_device(handle, &device); | |
211 | if (result) | |
d550d98d | 212 | return result; |
1da177e4 LT |
213 | |
214 | if ((state < ACPI_STATE_D0) || (state > ACPI_STATE_D3)) | |
d550d98d | 215 | return -EINVAL; |
1da177e4 LT |
216 | |
217 | /* Make sure this is a valid target state */ | |
218 | ||
219 | if (!device->flags.power_manageable) { | |
9805cb76 | 220 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device `[%s]' is not power manageable\n", |
19c38de8 | 221 | kobject_name(&device->dev.kobj))); |
d550d98d | 222 | return -ENODEV; |
1da177e4 | 223 | } |
b913100d | 224 | /* |
c35923bc | 225 | * Get device's current power state |
b913100d | 226 | */ |
c35923bc | 227 | acpi_bus_get_power(device->handle, &device->power.state); |
ec68373c | 228 | if ((state == device->power.state) && !device->flags.force_power_state) { |
b1028c54 KK |
229 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n", |
230 | state)); | |
231 | return 0; | |
1da177e4 | 232 | } |
b1028c54 | 233 | |
1da177e4 | 234 | if (!device->power.states[state].flags.valid) { |
cece9296 | 235 | printk(KERN_WARNING PREFIX "Device does not support D%d\n", state); |
d550d98d | 236 | return -ENODEV; |
1da177e4 LT |
237 | } |
238 | if (device->parent && (state < device->parent->power.state)) { | |
cece9296 | 239 | printk(KERN_WARNING PREFIX |
a6fc6720 | 240 | "Cannot set device to a higher-powered" |
cece9296 | 241 | " state than parent\n"); |
d550d98d | 242 | return -ENODEV; |
1da177e4 LT |
243 | } |
244 | ||
245 | /* | |
246 | * Transition Power | |
247 | * ---------------- | |
248 | * On transitions to a high-powered state we first apply power (via | |
249 | * power resources) then evalute _PSx. Conversly for transitions to | |
250 | * a lower-powered state. | |
b913100d | 251 | */ |
1da177e4 LT |
252 | if (state < device->power.state) { |
253 | if (device->power.flags.power_resources) { | |
254 | result = acpi_power_transition(device, state); | |
255 | if (result) | |
256 | goto end; | |
257 | } | |
258 | if (device->power.states[state].flags.explicit_set) { | |
4be44fcd LB |
259 | status = acpi_evaluate_object(device->handle, |
260 | object_name, NULL, NULL); | |
1da177e4 LT |
261 | if (ACPI_FAILURE(status)) { |
262 | result = -ENODEV; | |
263 | goto end; | |
264 | } | |
265 | } | |
4be44fcd | 266 | } else { |
1da177e4 | 267 | if (device->power.states[state].flags.explicit_set) { |
4be44fcd LB |
268 | status = acpi_evaluate_object(device->handle, |
269 | object_name, NULL, NULL); | |
1da177e4 LT |
270 | if (ACPI_FAILURE(status)) { |
271 | result = -ENODEV; | |
272 | goto end; | |
273 | } | |
274 | } | |
275 | if (device->power.flags.power_resources) { | |
276 | result = acpi_power_transition(device, state); | |
277 | if (result) | |
278 | goto end; | |
279 | } | |
280 | } | |
281 | ||
4be44fcd | 282 | end: |
1da177e4 | 283 | if (result) |
cece9296 LB |
284 | printk(KERN_WARNING PREFIX |
285 | "Transitioning device [%s] to D%d\n", | |
286 | device->pnp.bus_id, state); | |
5e32132b SL |
287 | else { |
288 | device->power.state = state; | |
4be44fcd LB |
289 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
290 | "Device [%s] transitioned to D%d\n", | |
291 | device->pnp.bus_id, state)); | |
5e32132b | 292 | } |
1da177e4 | 293 | |
d550d98d | 294 | return result; |
1da177e4 | 295 | } |
1da177e4 | 296 | |
4be44fcd | 297 | EXPORT_SYMBOL(acpi_bus_set_power); |
1da177e4 LT |
298 | |
299 | /* -------------------------------------------------------------------------- | |
300 | Event Management | |
301 | -------------------------------------------------------------------------- */ | |
302 | ||
14e04fb3 | 303 | #ifdef CONFIG_ACPI_PROC_EVENT |
1da177e4 LT |
304 | static DEFINE_SPINLOCK(acpi_bus_event_lock); |
305 | ||
306 | LIST_HEAD(acpi_bus_event_list); | |
307 | DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue); | |
308 | ||
4be44fcd | 309 | extern int event_is_open; |
1da177e4 | 310 | |
8db85d4c | 311 | int acpi_bus_generate_proc_event4(const char *device_class, const char *bus_id, u8 type, int data) |
1da177e4 | 312 | { |
8db85d4c | 313 | struct acpi_bus_event *event; |
4be44fcd | 314 | unsigned long flags = 0; |
1da177e4 | 315 | |
1da177e4 LT |
316 | /* drop event on the floor if no one's listening */ |
317 | if (!event_is_open) | |
d550d98d | 318 | return 0; |
1da177e4 LT |
319 | |
320 | event = kmalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC); | |
321 | if (!event) | |
d550d98d | 322 | return -ENOMEM; |
1da177e4 | 323 | |
8db85d4c AS |
324 | strcpy(event->device_class, device_class); |
325 | strcpy(event->bus_id, bus_id); | |
1da177e4 LT |
326 | event->type = type; |
327 | event->data = data; | |
328 | ||
329 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
330 | list_add_tail(&event->node, &acpi_bus_event_list); | |
331 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); | |
332 | ||
333 | wake_up_interruptible(&acpi_bus_event_queue); | |
334 | ||
d550d98d | 335 | return 0; |
8db85d4c AS |
336 | |
337 | } | |
338 | ||
339 | EXPORT_SYMBOL_GPL(acpi_bus_generate_proc_event4); | |
340 | ||
341 | int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data) | |
342 | { | |
343 | if (!device) | |
344 | return -EINVAL; | |
345 | return acpi_bus_generate_proc_event4(device->pnp.device_class, | |
346 | device->pnp.bus_id, type, data); | |
1da177e4 | 347 | } |
4be44fcd | 348 | |
14e04fb3 | 349 | EXPORT_SYMBOL(acpi_bus_generate_proc_event); |
1da177e4 | 350 | |
4be44fcd | 351 | int acpi_bus_receive_event(struct acpi_bus_event *event) |
1da177e4 | 352 | { |
4be44fcd LB |
353 | unsigned long flags = 0; |
354 | struct acpi_bus_event *entry = NULL; | |
1da177e4 LT |
355 | |
356 | DECLARE_WAITQUEUE(wait, current); | |
357 | ||
1da177e4 LT |
358 | |
359 | if (!event) | |
d550d98d | 360 | return -EINVAL; |
1da177e4 LT |
361 | |
362 | if (list_empty(&acpi_bus_event_list)) { | |
363 | ||
364 | set_current_state(TASK_INTERRUPTIBLE); | |
365 | add_wait_queue(&acpi_bus_event_queue, &wait); | |
366 | ||
367 | if (list_empty(&acpi_bus_event_list)) | |
368 | schedule(); | |
369 | ||
370 | remove_wait_queue(&acpi_bus_event_queue, &wait); | |
371 | set_current_state(TASK_RUNNING); | |
372 | ||
373 | if (signal_pending(current)) | |
d550d98d | 374 | return -ERESTARTSYS; |
1da177e4 LT |
375 | } |
376 | ||
377 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
4be44fcd LB |
378 | entry = |
379 | list_entry(acpi_bus_event_list.next, struct acpi_bus_event, node); | |
1da177e4 LT |
380 | if (entry) |
381 | list_del(&entry->node); | |
382 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); | |
383 | ||
384 | if (!entry) | |
d550d98d | 385 | return -ENODEV; |
1da177e4 LT |
386 | |
387 | memcpy(event, entry, sizeof(struct acpi_bus_event)); | |
388 | ||
389 | kfree(entry); | |
390 | ||
d550d98d | 391 | return 0; |
1da177e4 | 392 | } |
1da177e4 | 393 | |
14e04fb3 | 394 | #endif /* CONFIG_ACPI_PROC_EVENT */ |
1da177e4 LT |
395 | |
396 | /* -------------------------------------------------------------------------- | |
397 | Notification Handling | |
398 | -------------------------------------------------------------------------- */ | |
399 | ||
400 | static int | |
4be44fcd | 401 | acpi_bus_check_device(struct acpi_device *device, int *status_changed) |
1da177e4 | 402 | { |
4be44fcd | 403 | acpi_status status = 0; |
1da177e4 LT |
404 | struct acpi_device_status old_status; |
405 | ||
1da177e4 LT |
406 | |
407 | if (!device) | |
d550d98d | 408 | return -EINVAL; |
1da177e4 LT |
409 | |
410 | if (status_changed) | |
411 | *status_changed = 0; | |
412 | ||
413 | old_status = device->status; | |
414 | ||
415 | /* | |
416 | * Make sure this device's parent is present before we go about | |
417 | * messing with the device. | |
418 | */ | |
419 | if (device->parent && !device->parent->status.present) { | |
420 | device->status = device->parent->status; | |
421 | if (STRUCT_TO_INT(old_status) != STRUCT_TO_INT(device->status)) { | |
422 | if (status_changed) | |
423 | *status_changed = 1; | |
424 | } | |
d550d98d | 425 | return 0; |
1da177e4 LT |
426 | } |
427 | ||
428 | status = acpi_bus_get_status(device); | |
429 | if (ACPI_FAILURE(status)) | |
d550d98d | 430 | return -ENODEV; |
1da177e4 LT |
431 | |
432 | if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status)) | |
d550d98d | 433 | return 0; |
1da177e4 LT |
434 | |
435 | if (status_changed) | |
436 | *status_changed = 1; | |
4be44fcd | 437 | |
1da177e4 LT |
438 | /* |
439 | * Device Insertion/Removal | |
440 | */ | |
441 | if ((device->status.present) && !(old_status.present)) { | |
442 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n")); | |
443 | /* TBD: Handle device insertion */ | |
4be44fcd | 444 | } else if (!(device->status.present) && (old_status.present)) { |
1da177e4 LT |
445 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n")); |
446 | /* TBD: Handle device removal */ | |
447 | } | |
448 | ||
d550d98d | 449 | return 0; |
1da177e4 LT |
450 | } |
451 | ||
4be44fcd | 452 | static int acpi_bus_check_scope(struct acpi_device *device) |
1da177e4 | 453 | { |
4be44fcd LB |
454 | int result = 0; |
455 | int status_changed = 0; | |
1da177e4 | 456 | |
1da177e4 LT |
457 | |
458 | if (!device) | |
d550d98d | 459 | return -EINVAL; |
1da177e4 LT |
460 | |
461 | /* Status Change? */ | |
462 | result = acpi_bus_check_device(device, &status_changed); | |
463 | if (result) | |
d550d98d | 464 | return result; |
1da177e4 LT |
465 | |
466 | if (!status_changed) | |
d550d98d | 467 | return 0; |
1da177e4 LT |
468 | |
469 | /* | |
470 | * TBD: Enumerate child devices within this device's scope and | |
471 | * run acpi_bus_check_device()'s on them. | |
472 | */ | |
473 | ||
d550d98d | 474 | return 0; |
1da177e4 LT |
475 | } |
476 | ||
1da177e4 LT |
477 | /** |
478 | * acpi_bus_notify | |
479 | * --------------- | |
480 | * Callback for all 'system-level' device notifications (values 0x00-0x7F). | |
481 | */ | |
4be44fcd | 482 | static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) |
1da177e4 | 483 | { |
4be44fcd LB |
484 | int result = 0; |
485 | struct acpi_device *device = NULL; | |
1da177e4 | 486 | |
1da177e4 LT |
487 | |
488 | if (acpi_bus_get_device(handle, &device)) | |
d550d98d | 489 | return; |
1da177e4 LT |
490 | |
491 | switch (type) { | |
492 | ||
493 | case ACPI_NOTIFY_BUS_CHECK: | |
4be44fcd LB |
494 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
495 | "Received BUS CHECK notification for device [%s]\n", | |
496 | device->pnp.bus_id)); | |
1da177e4 | 497 | result = acpi_bus_check_scope(device); |
aafbcd16 | 498 | /* |
1da177e4 | 499 | * TBD: We'll need to outsource certain events to non-ACPI |
4be44fcd | 500 | * drivers via the device manager (device.c). |
1da177e4 LT |
501 | */ |
502 | break; | |
503 | ||
504 | case ACPI_NOTIFY_DEVICE_CHECK: | |
4be44fcd LB |
505 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
506 | "Received DEVICE CHECK notification for device [%s]\n", | |
507 | device->pnp.bus_id)); | |
1da177e4 | 508 | result = acpi_bus_check_device(device, NULL); |
aafbcd16 | 509 | /* |
1da177e4 | 510 | * TBD: We'll need to outsource certain events to non-ACPI |
4be44fcd | 511 | * drivers via the device manager (device.c). |
1da177e4 LT |
512 | */ |
513 | break; | |
514 | ||
515 | case ACPI_NOTIFY_DEVICE_WAKE: | |
4be44fcd LB |
516 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
517 | "Received DEVICE WAKE notification for device [%s]\n", | |
518 | device->pnp.bus_id)); | |
1da177e4 LT |
519 | /* TBD */ |
520 | break; | |
521 | ||
522 | case ACPI_NOTIFY_EJECT_REQUEST: | |
4be44fcd LB |
523 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
524 | "Received EJECT REQUEST notification for device [%s]\n", | |
525 | device->pnp.bus_id)); | |
1da177e4 LT |
526 | /* TBD */ |
527 | break; | |
528 | ||
529 | case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: | |
4be44fcd LB |
530 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
531 | "Received DEVICE CHECK LIGHT notification for device [%s]\n", | |
532 | device->pnp.bus_id)); | |
1da177e4 LT |
533 | /* TBD: Exactly what does 'light' mean? */ |
534 | break; | |
535 | ||
536 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
4be44fcd LB |
537 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
538 | "Received FREQUENCY MISMATCH notification for device [%s]\n", | |
539 | device->pnp.bus_id)); | |
1da177e4 LT |
540 | /* TBD */ |
541 | break; | |
542 | ||
543 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
4be44fcd LB |
544 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
545 | "Received BUS MODE MISMATCH notification for device [%s]\n", | |
546 | device->pnp.bus_id)); | |
1da177e4 LT |
547 | /* TBD */ |
548 | break; | |
549 | ||
550 | case ACPI_NOTIFY_POWER_FAULT: | |
4be44fcd LB |
551 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
552 | "Received POWER FAULT notification for device [%s]\n", | |
553 | device->pnp.bus_id)); | |
1da177e4 LT |
554 | /* TBD */ |
555 | break; | |
556 | ||
557 | default: | |
4be44fcd LB |
558 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
559 | "Received unknown/unsupported notification [%08x]\n", | |
560 | type)); | |
1da177e4 LT |
561 | break; |
562 | } | |
563 | ||
d550d98d | 564 | return; |
1da177e4 LT |
565 | } |
566 | ||
567 | /* -------------------------------------------------------------------------- | |
568 | Initialization/Cleanup | |
569 | -------------------------------------------------------------------------- */ | |
570 | ||
4be44fcd | 571 | static int __init acpi_bus_init_irq(void) |
1da177e4 | 572 | { |
4be44fcd LB |
573 | acpi_status status = AE_OK; |
574 | union acpi_object arg = { ACPI_TYPE_INTEGER }; | |
575 | struct acpi_object_list arg_list = { 1, &arg }; | |
576 | char *message = NULL; | |
1da177e4 | 577 | |
1da177e4 | 578 | |
aafbcd16 | 579 | /* |
1da177e4 LT |
580 | * Let the system know what interrupt model we are using by |
581 | * evaluating the \_PIC object, if exists. | |
582 | */ | |
583 | ||
584 | switch (acpi_irq_model) { | |
585 | case ACPI_IRQ_MODEL_PIC: | |
586 | message = "PIC"; | |
587 | break; | |
588 | case ACPI_IRQ_MODEL_IOAPIC: | |
589 | message = "IOAPIC"; | |
590 | break; | |
591 | case ACPI_IRQ_MODEL_IOSAPIC: | |
592 | message = "IOSAPIC"; | |
593 | break; | |
3948ec94 JK |
594 | case ACPI_IRQ_MODEL_PLATFORM: |
595 | message = "platform specific model"; | |
596 | break; | |
1da177e4 LT |
597 | default: |
598 | printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n"); | |
d550d98d | 599 | return -ENODEV; |
1da177e4 LT |
600 | } |
601 | ||
602 | printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message); | |
603 | ||
604 | arg.integer.value = acpi_irq_model; | |
605 | ||
606 | status = acpi_evaluate_object(NULL, "\\_PIC", &arg_list, NULL); | |
607 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { | |
a6fc6720 | 608 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC")); |
d550d98d | 609 | return -ENODEV; |
1da177e4 LT |
610 | } |
611 | ||
d550d98d | 612 | return 0; |
1da177e4 LT |
613 | } |
614 | ||
ad71860a AS |
615 | acpi_native_uint acpi_gbl_permanent_mmap; |
616 | ||
617 | ||
4be44fcd | 618 | void __init acpi_early_init(void) |
1da177e4 | 619 | { |
4be44fcd | 620 | acpi_status status = AE_OK; |
1da177e4 LT |
621 | |
622 | if (acpi_disabled) | |
d550d98d | 623 | return; |
1da177e4 | 624 | |
61686124 BM |
625 | printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION); |
626 | ||
1da177e4 LT |
627 | /* enable workarounds, unless strict ACPI spec. compliance */ |
628 | if (!acpi_strict) | |
629 | acpi_gbl_enable_interpreter_slack = TRUE; | |
630 | ||
ad71860a AS |
631 | acpi_gbl_permanent_mmap = 1; |
632 | ||
633 | status = acpi_reallocate_root_table(); | |
634 | if (ACPI_FAILURE(status)) { | |
635 | printk(KERN_ERR PREFIX | |
636 | "Unable to reallocate ACPI tables\n"); | |
637 | goto error0; | |
638 | } | |
639 | ||
1da177e4 LT |
640 | status = acpi_initialize_subsystem(); |
641 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
642 | printk(KERN_ERR PREFIX |
643 | "Unable to initialize the ACPI Interpreter\n"); | |
1da177e4 LT |
644 | goto error0; |
645 | } | |
646 | ||
647 | status = acpi_load_tables(); | |
648 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
649 | printk(KERN_ERR PREFIX |
650 | "Unable to load the System Description Tables\n"); | |
1da177e4 LT |
651 | goto error0; |
652 | } | |
653 | ||
1da177e4 LT |
654 | #ifdef CONFIG_X86 |
655 | if (!acpi_ioapic) { | |
5f3b1a8b | 656 | extern u8 acpi_sci_flags; |
1da177e4 LT |
657 | |
658 | /* compatible (0) means level (3) */ | |
5f3b1a8b AS |
659 | if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) { |
660 | acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK; | |
661 | acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL; | |
662 | } | |
1da177e4 | 663 | /* Set PIC-mode SCI trigger type */ |
cee324b1 | 664 | acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt, |
5f3b1a8b | 665 | (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2); |
1da177e4 LT |
666 | } else { |
667 | extern int acpi_sci_override_gsi; | |
668 | /* | |
cee324b1 | 669 | * now that acpi_gbl_FADT is initialized, |
1da177e4 LT |
670 | * update it with result from INT_SRC_OVR parsing |
671 | */ | |
cee324b1 | 672 | acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi; |
1da177e4 LT |
673 | } |
674 | #endif | |
675 | ||
4be44fcd LB |
676 | status = |
677 | acpi_enable_subsystem(~ | |
678 | (ACPI_NO_HARDWARE_INIT | | |
679 | ACPI_NO_ACPI_ENABLE)); | |
1da177e4 LT |
680 | if (ACPI_FAILURE(status)) { |
681 | printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); | |
682 | goto error0; | |
683 | } | |
684 | ||
d550d98d | 685 | return; |
1da177e4 | 686 | |
4be44fcd | 687 | error0: |
1da177e4 | 688 | disable_acpi(); |
d550d98d | 689 | return; |
1da177e4 LT |
690 | } |
691 | ||
4be44fcd | 692 | static int __init acpi_bus_init(void) |
1da177e4 | 693 | { |
4be44fcd LB |
694 | int result = 0; |
695 | acpi_status status = AE_OK; | |
696 | extern acpi_status acpi_os_initialize1(void); | |
1da177e4 | 697 | |
1da177e4 LT |
698 | |
699 | status = acpi_os_initialize1(); | |
700 | ||
4be44fcd LB |
701 | status = |
702 | acpi_enable_subsystem(ACPI_NO_HARDWARE_INIT | ACPI_NO_ACPI_ENABLE); | |
1da177e4 | 703 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
704 | printk(KERN_ERR PREFIX |
705 | "Unable to start the ACPI Interpreter\n"); | |
1da177e4 LT |
706 | goto error1; |
707 | } | |
708 | ||
709 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
710 | printk(KERN_ERR PREFIX |
711 | "Unable to initialize ACPI OS objects\n"); | |
1da177e4 LT |
712 | goto error1; |
713 | } | |
714 | #ifdef CONFIG_ACPI_EC | |
715 | /* | |
716 | * ACPI 2.0 requires the EC driver to be loaded and work before | |
717 | * the EC device is found in the namespace (i.e. before acpi_initialize_objects() | |
718 | * is called). | |
719 | * | |
aafbcd16 | 720 | * This is accomplished by looking for the ECDT table, and getting |
1da177e4 LT |
721 | * the EC parameters out of that. |
722 | */ | |
723 | status = acpi_ec_ecdt_probe(); | |
724 | /* Ignore result. Not having an ECDT is not fatal. */ | |
725 | #endif | |
726 | ||
727 | status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); | |
728 | if (ACPI_FAILURE(status)) { | |
729 | printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); | |
730 | goto error1; | |
731 | } | |
732 | ||
733 | printk(KERN_INFO PREFIX "Interpreter enabled\n"); | |
734 | ||
aafbcd16 AS |
735 | /* Initialize sleep structures */ |
736 | acpi_sleep_init(); | |
737 | ||
1da177e4 LT |
738 | /* |
739 | * Get the system interrupt model and evaluate \_PIC. | |
740 | */ | |
741 | result = acpi_bus_init_irq(); | |
742 | if (result) | |
743 | goto error1; | |
744 | ||
745 | /* | |
746 | * Register the for all standard device notifications. | |
747 | */ | |
4be44fcd LB |
748 | status = |
749 | acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, | |
750 | &acpi_bus_notify, NULL); | |
1da177e4 | 751 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
752 | printk(KERN_ERR PREFIX |
753 | "Unable to register for device notifications\n"); | |
1da177e4 LT |
754 | goto error1; |
755 | } | |
756 | ||
757 | /* | |
758 | * Create the top ACPI proc directory | |
759 | */ | |
760 | acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); | |
761 | ||
d550d98d | 762 | return 0; |
1da177e4 LT |
763 | |
764 | /* Mimic structured exception handling */ | |
4be44fcd | 765 | error1: |
1da177e4 | 766 | acpi_terminate(); |
d550d98d | 767 | return -ENODEV; |
1da177e4 LT |
768 | } |
769 | ||
99e0d2fc | 770 | struct kobject *acpi_kobj; |
1da177e4 | 771 | |
4be44fcd | 772 | static int __init acpi_init(void) |
1da177e4 | 773 | { |
4be44fcd | 774 | int result = 0; |
1da177e4 | 775 | |
1da177e4 | 776 | |
1da177e4 LT |
777 | if (acpi_disabled) { |
778 | printk(KERN_INFO PREFIX "Interpreter disabled.\n"); | |
d550d98d | 779 | return -ENODEV; |
1da177e4 LT |
780 | } |
781 | ||
f62ed9e3 | 782 | acpi_kobj = kobject_create_and_add("acpi", firmware_kobj); |
99e0d2fc GKH |
783 | if (!acpi_kobj) { |
784 | printk(KERN_WARNING "%s: kset create error\n", __FUNCTION__); | |
785 | acpi_kobj = NULL; | |
786 | } | |
1da177e4 LT |
787 | |
788 | result = acpi_bus_init(); | |
789 | ||
790 | if (!result) { | |
9f9adecd LB |
791 | if (!(pm_flags & PM_APM)) |
792 | pm_flags |= PM_ACPI; | |
1da177e4 | 793 | else { |
4be44fcd LB |
794 | printk(KERN_INFO PREFIX |
795 | "APM is already active, exiting\n"); | |
1da177e4 LT |
796 | disable_acpi(); |
797 | result = -ENODEV; | |
798 | } | |
1da177e4 LT |
799 | } else |
800 | disable_acpi(); | |
801 | ||
d550d98d | 802 | return result; |
1da177e4 LT |
803 | } |
804 | ||
805 | subsys_initcall(acpi_init); |