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