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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 LT |
297 | |
298 | /* -------------------------------------------------------------------------- | |
299 | Event Management | |
300 | -------------------------------------------------------------------------- */ | |
301 | ||
14e04fb3 | 302 | #ifdef CONFIG_ACPI_PROC_EVENT |
1da177e4 LT |
303 | static DEFINE_SPINLOCK(acpi_bus_event_lock); |
304 | ||
305 | LIST_HEAD(acpi_bus_event_list); | |
306 | DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue); | |
307 | ||
4be44fcd | 308 | extern int event_is_open; |
1da177e4 | 309 | |
8db85d4c | 310 | int acpi_bus_generate_proc_event4(const char *device_class, const char *bus_id, u8 type, int data) |
1da177e4 | 311 | { |
8db85d4c | 312 | struct acpi_bus_event *event; |
4be44fcd | 313 | unsigned long flags = 0; |
1da177e4 | 314 | |
1da177e4 LT |
315 | /* drop event on the floor if no one's listening */ |
316 | if (!event_is_open) | |
d550d98d | 317 | return 0; |
1da177e4 LT |
318 | |
319 | event = kmalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC); | |
320 | if (!event) | |
d550d98d | 321 | return -ENOMEM; |
1da177e4 | 322 | |
8db85d4c AS |
323 | strcpy(event->device_class, device_class); |
324 | strcpy(event->bus_id, bus_id); | |
1da177e4 LT |
325 | event->type = type; |
326 | event->data = data; | |
327 | ||
328 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
329 | list_add_tail(&event->node, &acpi_bus_event_list); | |
330 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); | |
331 | ||
332 | wake_up_interruptible(&acpi_bus_event_queue); | |
333 | ||
d550d98d | 334 | return 0; |
8db85d4c AS |
335 | |
336 | } | |
337 | ||
338 | EXPORT_SYMBOL_GPL(acpi_bus_generate_proc_event4); | |
339 | ||
340 | int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data) | |
341 | { | |
342 | if (!device) | |
343 | return -EINVAL; | |
344 | return acpi_bus_generate_proc_event4(device->pnp.device_class, | |
345 | device->pnp.bus_id, type, data); | |
1da177e4 | 346 | } |
4be44fcd | 347 | |
14e04fb3 | 348 | EXPORT_SYMBOL(acpi_bus_generate_proc_event); |
1da177e4 | 349 | |
4be44fcd | 350 | int acpi_bus_receive_event(struct acpi_bus_event *event) |
1da177e4 | 351 | { |
4be44fcd LB |
352 | unsigned long flags = 0; |
353 | struct acpi_bus_event *entry = NULL; | |
1da177e4 LT |
354 | |
355 | DECLARE_WAITQUEUE(wait, current); | |
356 | ||
1da177e4 LT |
357 | |
358 | if (!event) | |
d550d98d | 359 | return -EINVAL; |
1da177e4 LT |
360 | |
361 | if (list_empty(&acpi_bus_event_list)) { | |
362 | ||
363 | set_current_state(TASK_INTERRUPTIBLE); | |
364 | add_wait_queue(&acpi_bus_event_queue, &wait); | |
365 | ||
366 | if (list_empty(&acpi_bus_event_list)) | |
367 | schedule(); | |
368 | ||
369 | remove_wait_queue(&acpi_bus_event_queue, &wait); | |
370 | set_current_state(TASK_RUNNING); | |
371 | ||
372 | if (signal_pending(current)) | |
d550d98d | 373 | return -ERESTARTSYS; |
1da177e4 LT |
374 | } |
375 | ||
376 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
f0a37e00 CE |
377 | if (!list_empty(&acpi_bus_event_list)) { |
378 | entry = list_entry(acpi_bus_event_list.next, | |
379 | struct acpi_bus_event, node); | |
1da177e4 | 380 | list_del(&entry->node); |
f0a37e00 | 381 | } |
1da177e4 LT |
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 | ||
67a119f9 | 615 | u8 acpi_gbl_permanent_mmap; |
ad71860a AS |
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) { | |
1da177e4 | 656 | /* compatible (0) means level (3) */ |
5f3b1a8b AS |
657 | if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) { |
658 | acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK; | |
659 | acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL; | |
660 | } | |
1da177e4 | 661 | /* Set PIC-mode SCI trigger type */ |
cee324b1 | 662 | acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt, |
5f3b1a8b | 663 | (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2); |
1da177e4 | 664 | } else { |
1da177e4 | 665 | /* |
cee324b1 | 666 | * now that acpi_gbl_FADT is initialized, |
1da177e4 LT |
667 | * update it with result from INT_SRC_OVR parsing |
668 | */ | |
cee324b1 | 669 | acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi; |
1da177e4 LT |
670 | } |
671 | #endif | |
672 | ||
4be44fcd LB |
673 | status = |
674 | acpi_enable_subsystem(~ | |
675 | (ACPI_NO_HARDWARE_INIT | | |
676 | ACPI_NO_ACPI_ENABLE)); | |
1da177e4 LT |
677 | if (ACPI_FAILURE(status)) { |
678 | printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); | |
679 | goto error0; | |
680 | } | |
681 | ||
d550d98d | 682 | return; |
1da177e4 | 683 | |
4be44fcd | 684 | error0: |
1da177e4 | 685 | disable_acpi(); |
d550d98d | 686 | return; |
1da177e4 LT |
687 | } |
688 | ||
4be44fcd | 689 | static int __init acpi_bus_init(void) |
1da177e4 | 690 | { |
4be44fcd LB |
691 | int result = 0; |
692 | acpi_status status = AE_OK; | |
693 | extern acpi_status acpi_os_initialize1(void); | |
1da177e4 | 694 | |
1da177e4 LT |
695 | |
696 | status = acpi_os_initialize1(); | |
697 | ||
4be44fcd LB |
698 | status = |
699 | acpi_enable_subsystem(ACPI_NO_HARDWARE_INIT | ACPI_NO_ACPI_ENABLE); | |
1da177e4 | 700 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
701 | printk(KERN_ERR PREFIX |
702 | "Unable to start the ACPI Interpreter\n"); | |
1da177e4 LT |
703 | goto error1; |
704 | } | |
705 | ||
706 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
707 | printk(KERN_ERR PREFIX |
708 | "Unable to initialize ACPI OS objects\n"); | |
1da177e4 LT |
709 | goto error1; |
710 | } | |
711 | #ifdef CONFIG_ACPI_EC | |
712 | /* | |
713 | * ACPI 2.0 requires the EC driver to be loaded and work before | |
714 | * the EC device is found in the namespace (i.e. before acpi_initialize_objects() | |
715 | * is called). | |
716 | * | |
aafbcd16 | 717 | * This is accomplished by looking for the ECDT table, and getting |
1da177e4 LT |
718 | * the EC parameters out of that. |
719 | */ | |
720 | status = acpi_ec_ecdt_probe(); | |
721 | /* Ignore result. Not having an ECDT is not fatal. */ | |
722 | #endif | |
723 | ||
724 | status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); | |
725 | if (ACPI_FAILURE(status)) { | |
726 | printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); | |
727 | goto error1; | |
728 | } | |
729 | ||
730 | printk(KERN_INFO PREFIX "Interpreter enabled\n"); | |
731 | ||
aafbcd16 AS |
732 | /* Initialize sleep structures */ |
733 | acpi_sleep_init(); | |
734 | ||
1da177e4 LT |
735 | /* |
736 | * Get the system interrupt model and evaluate \_PIC. | |
737 | */ | |
738 | result = acpi_bus_init_irq(); | |
739 | if (result) | |
740 | goto error1; | |
741 | ||
742 | /* | |
743 | * Register the for all standard device notifications. | |
744 | */ | |
4be44fcd LB |
745 | status = |
746 | acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, | |
747 | &acpi_bus_notify, NULL); | |
1da177e4 | 748 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
749 | printk(KERN_ERR PREFIX |
750 | "Unable to register for device notifications\n"); | |
1da177e4 LT |
751 | goto error1; |
752 | } | |
753 | ||
754 | /* | |
755 | * Create the top ACPI proc directory | |
756 | */ | |
757 | acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); | |
758 | ||
d550d98d | 759 | return 0; |
1da177e4 LT |
760 | |
761 | /* Mimic structured exception handling */ | |
4be44fcd | 762 | error1: |
1da177e4 | 763 | acpi_terminate(); |
d550d98d | 764 | return -ENODEV; |
1da177e4 LT |
765 | } |
766 | ||
99e0d2fc | 767 | struct kobject *acpi_kobj; |
1da177e4 | 768 | |
4be44fcd | 769 | static int __init acpi_init(void) |
1da177e4 | 770 | { |
4be44fcd | 771 | int result = 0; |
1da177e4 | 772 | |
1da177e4 | 773 | |
1da177e4 LT |
774 | if (acpi_disabled) { |
775 | printk(KERN_INFO PREFIX "Interpreter disabled.\n"); | |
d550d98d | 776 | return -ENODEV; |
1da177e4 LT |
777 | } |
778 | ||
f62ed9e3 | 779 | acpi_kobj = kobject_create_and_add("acpi", firmware_kobj); |
99e0d2fc | 780 | if (!acpi_kobj) { |
96b2dd1f | 781 | printk(KERN_WARNING "%s: kset create error\n", __func__); |
99e0d2fc GKH |
782 | acpi_kobj = NULL; |
783 | } | |
1da177e4 LT |
784 | |
785 | result = acpi_bus_init(); | |
786 | ||
787 | if (!result) { | |
7752d5cf | 788 | pci_mmcfg_late_init(); |
9f9adecd LB |
789 | if (!(pm_flags & PM_APM)) |
790 | pm_flags |= PM_ACPI; | |
1da177e4 | 791 | else { |
4be44fcd LB |
792 | printk(KERN_INFO PREFIX |
793 | "APM is already active, exiting\n"); | |
1da177e4 LT |
794 | disable_acpi(); |
795 | result = -ENODEV; | |
796 | } | |
1da177e4 LT |
797 | } else |
798 | disable_acpi(); | |
799 | ||
d550d98d | 800 | return result; |
1da177e4 LT |
801 | } |
802 | ||
803 | subsys_initcall(acpi_init); |