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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> | |
28 | #include <linux/list.h> | |
29 | #include <linux/sched.h> | |
30 | #include <linux/pm.h> | |
bca73e4b | 31 | #include <linux/pm_legacy.h> |
1da177e4 LT |
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 |
4be44fcd | 41 | ACPI_MODULE_NAME("acpi_bus") |
1da177e4 LT |
42 | #ifdef CONFIG_X86 |
43 | extern void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger); | |
44 | #endif | |
45 | ||
793c2388 | 46 | struct fadt_descriptor acpi_fadt; |
1da177e4 LT |
47 | EXPORT_SYMBOL(acpi_fadt); |
48 | ||
4be44fcd LB |
49 | struct acpi_device *acpi_root; |
50 | struct proc_dir_entry *acpi_root_dir; | |
1da177e4 LT |
51 | EXPORT_SYMBOL(acpi_root_dir); |
52 | ||
53 | #define STRUCT_TO_INT(s) (*((int*)&s)) | |
54 | ||
55 | /* -------------------------------------------------------------------------- | |
56 | Device Management | |
57 | -------------------------------------------------------------------------- */ | |
58 | ||
4be44fcd | 59 | int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device) |
1da177e4 | 60 | { |
4be44fcd | 61 | acpi_status status = AE_OK; |
1da177e4 LT |
62 | |
63 | ACPI_FUNCTION_TRACE("acpi_bus_get_device"); | |
64 | ||
65 | if (!device) | |
66 | return_VALUE(-EINVAL); | |
67 | ||
68 | /* TBD: Support fixed-feature devices */ | |
69 | ||
4be44fcd | 70 | status = acpi_get_data(handle, acpi_bus_data_handler, (void **)device); |
1da177e4 | 71 | if (ACPI_FAILURE(status) || !*device) { |
a6fc6720 | 72 | ACPI_EXCEPTION((AE_INFO, status, "No context for object [%p]", handle)); |
1da177e4 LT |
73 | return_VALUE(-ENODEV); |
74 | } | |
75 | ||
76 | return_VALUE(0); | |
77 | } | |
4be44fcd | 78 | |
1da177e4 LT |
79 | EXPORT_SYMBOL(acpi_bus_get_device); |
80 | ||
4be44fcd | 81 | int acpi_bus_get_status(struct acpi_device *device) |
1da177e4 | 82 | { |
4be44fcd LB |
83 | acpi_status status = AE_OK; |
84 | unsigned long sta = 0; | |
85 | ||
1da177e4 LT |
86 | ACPI_FUNCTION_TRACE("acpi_bus_get_status"); |
87 | ||
88 | if (!device) | |
89 | return_VALUE(-EINVAL); | |
90 | ||
91 | /* | |
92 | * Evaluate _STA if present. | |
93 | */ | |
94 | if (device->flags.dynamic_status) { | |
4be44fcd LB |
95 | status = |
96 | acpi_evaluate_integer(device->handle, "_STA", NULL, &sta); | |
1da177e4 LT |
97 | if (ACPI_FAILURE(status)) |
98 | return_VALUE(-ENODEV); | |
4be44fcd | 99 | STRUCT_TO_INT(device->status) = (int)sta; |
1da177e4 LT |
100 | } |
101 | ||
102 | /* | |
103 | * Otherwise we assume the status of our parent (unless we don't | |
104 | * have one, in which case status is implied). | |
105 | */ | |
106 | else if (device->parent) | |
107 | device->status = device->parent->status; | |
108 | else | |
109 | STRUCT_TO_INT(device->status) = 0x0F; | |
110 | ||
111 | if (device->status.functional && !device->status.present) { | |
112 | printk(KERN_WARNING PREFIX "Device [%s] status [%08x]: " | |
4be44fcd LB |
113 | "functional but not present; setting present\n", |
114 | device->pnp.bus_id, (u32) STRUCT_TO_INT(device->status)); | |
1da177e4 LT |
115 | device->status.present = 1; |
116 | } | |
117 | ||
4be44fcd LB |
118 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n", |
119 | device->pnp.bus_id, | |
120 | (u32) STRUCT_TO_INT(device->status))); | |
1da177e4 LT |
121 | |
122 | return_VALUE(0); | |
123 | } | |
1da177e4 | 124 | |
4be44fcd | 125 | EXPORT_SYMBOL(acpi_bus_get_status); |
1da177e4 LT |
126 | |
127 | /* -------------------------------------------------------------------------- | |
128 | Power Management | |
129 | -------------------------------------------------------------------------- */ | |
130 | ||
4be44fcd | 131 | int acpi_bus_get_power(acpi_handle handle, int *state) |
1da177e4 | 132 | { |
4be44fcd LB |
133 | int result = 0; |
134 | acpi_status status = 0; | |
135 | struct acpi_device *device = NULL; | |
136 | unsigned long psc = 0; | |
1da177e4 LT |
137 | |
138 | ACPI_FUNCTION_TRACE("acpi_bus_get_power"); | |
139 | ||
140 | result = acpi_bus_get_device(handle, &device); | |
141 | if (result) | |
142 | return_VALUE(result); | |
143 | ||
144 | *state = ACPI_STATE_UNKNOWN; | |
145 | ||
146 | if (!device->flags.power_manageable) { | |
147 | /* TBD: Non-recursive algorithm for walking up hierarchy */ | |
148 | if (device->parent) | |
149 | *state = device->parent->power.state; | |
150 | else | |
151 | *state = ACPI_STATE_D0; | |
4be44fcd | 152 | } else { |
1da177e4 LT |
153 | /* |
154 | * Get the device's power state either directly (via _PSC) or | |
155 | * indirectly (via power resources). | |
156 | */ | |
157 | if (device->power.flags.explicit_get) { | |
4be44fcd LB |
158 | status = acpi_evaluate_integer(device->handle, "_PSC", |
159 | NULL, &psc); | |
1da177e4 LT |
160 | if (ACPI_FAILURE(status)) |
161 | return_VALUE(-ENODEV); | |
4be44fcd LB |
162 | device->power.state = (int)psc; |
163 | } else if (device->power.flags.power_resources) { | |
1da177e4 LT |
164 | result = acpi_power_get_inferred_state(device); |
165 | if (result) | |
166 | return_VALUE(result); | |
167 | } | |
168 | ||
169 | *state = device->power.state; | |
170 | } | |
171 | ||
172 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] power state is D%d\n", | |
4be44fcd | 173 | device->pnp.bus_id, device->power.state)); |
1da177e4 LT |
174 | |
175 | return_VALUE(0); | |
176 | } | |
1da177e4 | 177 | |
4be44fcd | 178 | EXPORT_SYMBOL(acpi_bus_get_power); |
1da177e4 | 179 | |
4be44fcd | 180 | int acpi_bus_set_power(acpi_handle handle, int state) |
1da177e4 | 181 | { |
4be44fcd LB |
182 | int result = 0; |
183 | acpi_status status = AE_OK; | |
184 | struct acpi_device *device = NULL; | |
185 | char object_name[5] = { '_', 'P', 'S', '0' + state, '\0' }; | |
1da177e4 LT |
186 | |
187 | ACPI_FUNCTION_TRACE("acpi_bus_set_power"); | |
188 | ||
189 | result = acpi_bus_get_device(handle, &device); | |
190 | if (result) | |
191 | return_VALUE(result); | |
192 | ||
193 | if ((state < ACPI_STATE_D0) || (state > ACPI_STATE_D3)) | |
194 | return_VALUE(-EINVAL); | |
195 | ||
196 | /* Make sure this is a valid target state */ | |
197 | ||
198 | if (!device->flags.power_manageable) { | |
64dedfb8 JP |
199 | printk(KERN_DEBUG "Device `[%s]is not power manageable", |
200 | device->kobj.name); | |
1da177e4 LT |
201 | return_VALUE(-ENODEV); |
202 | } | |
b913100d DSL |
203 | /* |
204 | * Get device's current power state if it's unknown | |
205 | * This means device power state isn't initialized or previous setting failed | |
206 | */ | |
0feabb01 KK |
207 | if (!device->flags.force_power_state) { |
208 | if (device->power.state == ACPI_STATE_UNKNOWN) | |
209 | acpi_bus_get_power(device->handle, &device->power.state); | |
210 | if (state == device->power.state) { | |
211 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n", | |
212 | state)); | |
213 | return_VALUE(0); | |
214 | } | |
1da177e4 LT |
215 | } |
216 | if (!device->power.states[state].flags.valid) { | |
cece9296 | 217 | printk(KERN_WARNING PREFIX "Device does not support D%d\n", state); |
1da177e4 LT |
218 | return_VALUE(-ENODEV); |
219 | } | |
220 | if (device->parent && (state < device->parent->power.state)) { | |
cece9296 | 221 | printk(KERN_WARNING PREFIX |
a6fc6720 | 222 | "Cannot set device to a higher-powered" |
cece9296 | 223 | " state than parent\n"); |
1da177e4 LT |
224 | return_VALUE(-ENODEV); |
225 | } | |
226 | ||
227 | /* | |
228 | * Transition Power | |
229 | * ---------------- | |
230 | * On transitions to a high-powered state we first apply power (via | |
231 | * power resources) then evalute _PSx. Conversly for transitions to | |
232 | * a lower-powered state. | |
b913100d | 233 | */ |
1da177e4 LT |
234 | if (state < device->power.state) { |
235 | if (device->power.flags.power_resources) { | |
236 | result = acpi_power_transition(device, state); | |
237 | if (result) | |
238 | goto end; | |
239 | } | |
240 | if (device->power.states[state].flags.explicit_set) { | |
4be44fcd LB |
241 | status = acpi_evaluate_object(device->handle, |
242 | object_name, NULL, NULL); | |
1da177e4 LT |
243 | if (ACPI_FAILURE(status)) { |
244 | result = -ENODEV; | |
245 | goto end; | |
246 | } | |
247 | } | |
4be44fcd | 248 | } else { |
1da177e4 | 249 | if (device->power.states[state].flags.explicit_set) { |
4be44fcd LB |
250 | status = acpi_evaluate_object(device->handle, |
251 | object_name, NULL, NULL); | |
1da177e4 LT |
252 | if (ACPI_FAILURE(status)) { |
253 | result = -ENODEV; | |
254 | goto end; | |
255 | } | |
256 | } | |
257 | if (device->power.flags.power_resources) { | |
258 | result = acpi_power_transition(device, state); | |
259 | if (result) | |
260 | goto end; | |
261 | } | |
262 | } | |
263 | ||
4be44fcd | 264 | end: |
1da177e4 | 265 | if (result) |
cece9296 LB |
266 | printk(KERN_WARNING PREFIX |
267 | "Transitioning device [%s] to D%d\n", | |
268 | device->pnp.bus_id, state); | |
1da177e4 | 269 | else |
4be44fcd LB |
270 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
271 | "Device [%s] transitioned to D%d\n", | |
272 | device->pnp.bus_id, state)); | |
1da177e4 LT |
273 | |
274 | return_VALUE(result); | |
275 | } | |
1da177e4 | 276 | |
4be44fcd | 277 | EXPORT_SYMBOL(acpi_bus_set_power); |
1da177e4 LT |
278 | |
279 | /* -------------------------------------------------------------------------- | |
280 | Event Management | |
281 | -------------------------------------------------------------------------- */ | |
282 | ||
283 | static DEFINE_SPINLOCK(acpi_bus_event_lock); | |
284 | ||
285 | LIST_HEAD(acpi_bus_event_list); | |
286 | DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue); | |
287 | ||
4be44fcd | 288 | extern int event_is_open; |
1da177e4 | 289 | |
4be44fcd | 290 | int acpi_bus_generate_event(struct acpi_device *device, u8 type, int data) |
1da177e4 | 291 | { |
4be44fcd LB |
292 | struct acpi_bus_event *event = NULL; |
293 | unsigned long flags = 0; | |
1da177e4 LT |
294 | |
295 | ACPI_FUNCTION_TRACE("acpi_bus_generate_event"); | |
296 | ||
297 | if (!device) | |
298 | return_VALUE(-EINVAL); | |
299 | ||
300 | /* drop event on the floor if no one's listening */ | |
301 | if (!event_is_open) | |
302 | return_VALUE(0); | |
303 | ||
304 | event = kmalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC); | |
305 | if (!event) | |
306 | return_VALUE(-ENOMEM); | |
307 | ||
308 | strcpy(event->device_class, device->pnp.device_class); | |
309 | strcpy(event->bus_id, device->pnp.bus_id); | |
310 | event->type = type; | |
311 | event->data = data; | |
312 | ||
313 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
314 | list_add_tail(&event->node, &acpi_bus_event_list); | |
315 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); | |
316 | ||
317 | wake_up_interruptible(&acpi_bus_event_queue); | |
318 | ||
319 | return_VALUE(0); | |
320 | } | |
4be44fcd | 321 | |
1da177e4 LT |
322 | EXPORT_SYMBOL(acpi_bus_generate_event); |
323 | ||
4be44fcd | 324 | int acpi_bus_receive_event(struct acpi_bus_event *event) |
1da177e4 | 325 | { |
4be44fcd LB |
326 | unsigned long flags = 0; |
327 | struct acpi_bus_event *entry = NULL; | |
1da177e4 LT |
328 | |
329 | DECLARE_WAITQUEUE(wait, current); | |
330 | ||
331 | ACPI_FUNCTION_TRACE("acpi_bus_receive_event"); | |
332 | ||
333 | if (!event) | |
334 | return_VALUE(-EINVAL); | |
335 | ||
336 | if (list_empty(&acpi_bus_event_list)) { | |
337 | ||
338 | set_current_state(TASK_INTERRUPTIBLE); | |
339 | add_wait_queue(&acpi_bus_event_queue, &wait); | |
340 | ||
341 | if (list_empty(&acpi_bus_event_list)) | |
342 | schedule(); | |
343 | ||
344 | remove_wait_queue(&acpi_bus_event_queue, &wait); | |
345 | set_current_state(TASK_RUNNING); | |
346 | ||
347 | if (signal_pending(current)) | |
348 | return_VALUE(-ERESTARTSYS); | |
349 | } | |
350 | ||
351 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
4be44fcd LB |
352 | entry = |
353 | list_entry(acpi_bus_event_list.next, struct acpi_bus_event, node); | |
1da177e4 LT |
354 | if (entry) |
355 | list_del(&entry->node); | |
356 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); | |
357 | ||
358 | if (!entry) | |
359 | return_VALUE(-ENODEV); | |
360 | ||
361 | memcpy(event, entry, sizeof(struct acpi_bus_event)); | |
362 | ||
363 | kfree(entry); | |
364 | ||
365 | return_VALUE(0); | |
366 | } | |
1da177e4 | 367 | |
4be44fcd | 368 | EXPORT_SYMBOL(acpi_bus_receive_event); |
1da177e4 LT |
369 | |
370 | /* -------------------------------------------------------------------------- | |
371 | Notification Handling | |
372 | -------------------------------------------------------------------------- */ | |
373 | ||
374 | static int | |
4be44fcd | 375 | acpi_bus_check_device(struct acpi_device *device, int *status_changed) |
1da177e4 | 376 | { |
4be44fcd | 377 | acpi_status status = 0; |
1da177e4 LT |
378 | struct acpi_device_status old_status; |
379 | ||
380 | ACPI_FUNCTION_TRACE("acpi_bus_check_device"); | |
381 | ||
382 | if (!device) | |
383 | return_VALUE(-EINVAL); | |
384 | ||
385 | if (status_changed) | |
386 | *status_changed = 0; | |
387 | ||
388 | old_status = device->status; | |
389 | ||
390 | /* | |
391 | * Make sure this device's parent is present before we go about | |
392 | * messing with the device. | |
393 | */ | |
394 | if (device->parent && !device->parent->status.present) { | |
395 | device->status = device->parent->status; | |
396 | if (STRUCT_TO_INT(old_status) != STRUCT_TO_INT(device->status)) { | |
397 | if (status_changed) | |
398 | *status_changed = 1; | |
399 | } | |
400 | return_VALUE(0); | |
401 | } | |
402 | ||
403 | status = acpi_bus_get_status(device); | |
404 | if (ACPI_FAILURE(status)) | |
405 | return_VALUE(-ENODEV); | |
406 | ||
407 | if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status)) | |
408 | return_VALUE(0); | |
409 | ||
410 | if (status_changed) | |
411 | *status_changed = 1; | |
4be44fcd | 412 | |
1da177e4 LT |
413 | /* |
414 | * Device Insertion/Removal | |
415 | */ | |
416 | if ((device->status.present) && !(old_status.present)) { | |
417 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n")); | |
418 | /* TBD: Handle device insertion */ | |
4be44fcd | 419 | } else if (!(device->status.present) && (old_status.present)) { |
1da177e4 LT |
420 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n")); |
421 | /* TBD: Handle device removal */ | |
422 | } | |
423 | ||
424 | return_VALUE(0); | |
425 | } | |
426 | ||
4be44fcd | 427 | static int acpi_bus_check_scope(struct acpi_device *device) |
1da177e4 | 428 | { |
4be44fcd LB |
429 | int result = 0; |
430 | int status_changed = 0; | |
1da177e4 LT |
431 | |
432 | ACPI_FUNCTION_TRACE("acpi_bus_check_scope"); | |
433 | ||
434 | if (!device) | |
435 | return_VALUE(-EINVAL); | |
436 | ||
437 | /* Status Change? */ | |
438 | result = acpi_bus_check_device(device, &status_changed); | |
439 | if (result) | |
440 | return_VALUE(result); | |
441 | ||
442 | if (!status_changed) | |
443 | return_VALUE(0); | |
444 | ||
445 | /* | |
446 | * TBD: Enumerate child devices within this device's scope and | |
447 | * run acpi_bus_check_device()'s on them. | |
448 | */ | |
449 | ||
450 | return_VALUE(0); | |
451 | } | |
452 | ||
1da177e4 LT |
453 | /** |
454 | * acpi_bus_notify | |
455 | * --------------- | |
456 | * Callback for all 'system-level' device notifications (values 0x00-0x7F). | |
457 | */ | |
4be44fcd | 458 | static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) |
1da177e4 | 459 | { |
4be44fcd LB |
460 | int result = 0; |
461 | struct acpi_device *device = NULL; | |
1da177e4 LT |
462 | |
463 | ACPI_FUNCTION_TRACE("acpi_bus_notify"); | |
464 | ||
465 | if (acpi_bus_get_device(handle, &device)) | |
466 | return_VOID; | |
467 | ||
468 | switch (type) { | |
469 | ||
470 | case ACPI_NOTIFY_BUS_CHECK: | |
4be44fcd LB |
471 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
472 | "Received BUS CHECK notification for device [%s]\n", | |
473 | device->pnp.bus_id)); | |
1da177e4 LT |
474 | result = acpi_bus_check_scope(device); |
475 | /* | |
476 | * TBD: We'll need to outsource certain events to non-ACPI | |
4be44fcd | 477 | * drivers via the device manager (device.c). |
1da177e4 LT |
478 | */ |
479 | break; | |
480 | ||
481 | case ACPI_NOTIFY_DEVICE_CHECK: | |
4be44fcd LB |
482 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
483 | "Received DEVICE CHECK notification for device [%s]\n", | |
484 | device->pnp.bus_id)); | |
1da177e4 LT |
485 | result = acpi_bus_check_device(device, NULL); |
486 | /* | |
487 | * TBD: We'll need to outsource certain events to non-ACPI | |
4be44fcd | 488 | * drivers via the device manager (device.c). |
1da177e4 LT |
489 | */ |
490 | break; | |
491 | ||
492 | case ACPI_NOTIFY_DEVICE_WAKE: | |
4be44fcd LB |
493 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
494 | "Received DEVICE WAKE notification for device [%s]\n", | |
495 | device->pnp.bus_id)); | |
1da177e4 LT |
496 | /* TBD */ |
497 | break; | |
498 | ||
499 | case ACPI_NOTIFY_EJECT_REQUEST: | |
4be44fcd LB |
500 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
501 | "Received EJECT REQUEST notification for device [%s]\n", | |
502 | device->pnp.bus_id)); | |
1da177e4 LT |
503 | /* TBD */ |
504 | break; | |
505 | ||
506 | case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: | |
4be44fcd LB |
507 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
508 | "Received DEVICE CHECK LIGHT notification for device [%s]\n", | |
509 | device->pnp.bus_id)); | |
1da177e4 LT |
510 | /* TBD: Exactly what does 'light' mean? */ |
511 | break; | |
512 | ||
513 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
4be44fcd LB |
514 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
515 | "Received FREQUENCY MISMATCH notification for device [%s]\n", | |
516 | device->pnp.bus_id)); | |
1da177e4 LT |
517 | /* TBD */ |
518 | break; | |
519 | ||
520 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
4be44fcd LB |
521 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
522 | "Received BUS MODE MISMATCH notification for device [%s]\n", | |
523 | device->pnp.bus_id)); | |
1da177e4 LT |
524 | /* TBD */ |
525 | break; | |
526 | ||
527 | case ACPI_NOTIFY_POWER_FAULT: | |
4be44fcd LB |
528 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
529 | "Received POWER FAULT notification for device [%s]\n", | |
530 | device->pnp.bus_id)); | |
1da177e4 LT |
531 | /* TBD */ |
532 | break; | |
533 | ||
534 | default: | |
4be44fcd LB |
535 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
536 | "Received unknown/unsupported notification [%08x]\n", | |
537 | type)); | |
1da177e4 LT |
538 | break; |
539 | } | |
540 | ||
541 | return_VOID; | |
542 | } | |
543 | ||
544 | /* -------------------------------------------------------------------------- | |
545 | Initialization/Cleanup | |
546 | -------------------------------------------------------------------------- */ | |
547 | ||
4be44fcd | 548 | static int __init acpi_bus_init_irq(void) |
1da177e4 | 549 | { |
4be44fcd LB |
550 | acpi_status status = AE_OK; |
551 | union acpi_object arg = { ACPI_TYPE_INTEGER }; | |
552 | struct acpi_object_list arg_list = { 1, &arg }; | |
553 | char *message = NULL; | |
1da177e4 LT |
554 | |
555 | ACPI_FUNCTION_TRACE("acpi_bus_init_irq"); | |
556 | ||
557 | /* | |
558 | * Let the system know what interrupt model we are using by | |
559 | * evaluating the \_PIC object, if exists. | |
560 | */ | |
561 | ||
562 | switch (acpi_irq_model) { | |
563 | case ACPI_IRQ_MODEL_PIC: | |
564 | message = "PIC"; | |
565 | break; | |
566 | case ACPI_IRQ_MODEL_IOAPIC: | |
567 | message = "IOAPIC"; | |
568 | break; | |
569 | case ACPI_IRQ_MODEL_IOSAPIC: | |
570 | message = "IOSAPIC"; | |
571 | break; | |
572 | default: | |
573 | printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n"); | |
574 | return_VALUE(-ENODEV); | |
575 | } | |
576 | ||
577 | printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message); | |
578 | ||
579 | arg.integer.value = acpi_irq_model; | |
580 | ||
581 | status = acpi_evaluate_object(NULL, "\\_PIC", &arg_list, NULL); | |
582 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { | |
a6fc6720 | 583 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC")); |
1da177e4 LT |
584 | return_VALUE(-ENODEV); |
585 | } | |
586 | ||
587 | return_VALUE(0); | |
588 | } | |
589 | ||
4be44fcd | 590 | void __init acpi_early_init(void) |
1da177e4 | 591 | { |
4be44fcd LB |
592 | acpi_status status = AE_OK; |
593 | struct acpi_buffer buffer = { sizeof(acpi_fadt), &acpi_fadt }; | |
1da177e4 LT |
594 | |
595 | ACPI_FUNCTION_TRACE("acpi_early_init"); | |
596 | ||
597 | if (acpi_disabled) | |
598 | return_VOID; | |
599 | ||
61686124 BM |
600 | printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION); |
601 | ||
1da177e4 LT |
602 | /* enable workarounds, unless strict ACPI spec. compliance */ |
603 | if (!acpi_strict) | |
604 | acpi_gbl_enable_interpreter_slack = TRUE; | |
605 | ||
606 | status = acpi_initialize_subsystem(); | |
607 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
608 | printk(KERN_ERR PREFIX |
609 | "Unable to initialize the ACPI Interpreter\n"); | |
1da177e4 LT |
610 | goto error0; |
611 | } | |
612 | ||
613 | status = acpi_load_tables(); | |
614 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
615 | printk(KERN_ERR PREFIX |
616 | "Unable to load the System Description Tables\n"); | |
1da177e4 LT |
617 | goto error0; |
618 | } | |
619 | ||
620 | /* | |
621 | * Get a separate copy of the FADT for use by other drivers. | |
622 | */ | |
b229cf92 | 623 | status = acpi_get_table(ACPI_TABLE_ID_FADT, 1, &buffer); |
1da177e4 LT |
624 | if (ACPI_FAILURE(status)) { |
625 | printk(KERN_ERR PREFIX "Unable to get the FADT\n"); | |
626 | goto error0; | |
627 | } | |
1da177e4 LT |
628 | #ifdef CONFIG_X86 |
629 | if (!acpi_ioapic) { | |
630 | extern acpi_interrupt_flags acpi_sci_flags; | |
631 | ||
632 | /* compatible (0) means level (3) */ | |
633 | if (acpi_sci_flags.trigger == 0) | |
634 | acpi_sci_flags.trigger = 3; | |
635 | ||
636 | /* Set PIC-mode SCI trigger type */ | |
4be44fcd LB |
637 | acpi_pic_sci_set_trigger(acpi_fadt.sci_int, |
638 | acpi_sci_flags.trigger); | |
1da177e4 LT |
639 | } else { |
640 | extern int acpi_sci_override_gsi; | |
641 | /* | |
642 | * now that acpi_fadt is initialized, | |
643 | * update it with result from INT_SRC_OVR parsing | |
644 | */ | |
645 | acpi_fadt.sci_int = acpi_sci_override_gsi; | |
646 | } | |
647 | #endif | |
648 | ||
4be44fcd LB |
649 | status = |
650 | acpi_enable_subsystem(~ | |
651 | (ACPI_NO_HARDWARE_INIT | | |
652 | ACPI_NO_ACPI_ENABLE)); | |
1da177e4 LT |
653 | if (ACPI_FAILURE(status)) { |
654 | printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); | |
655 | goto error0; | |
656 | } | |
657 | ||
658 | return_VOID; | |
659 | ||
4be44fcd | 660 | error0: |
1da177e4 LT |
661 | disable_acpi(); |
662 | return_VOID; | |
663 | } | |
664 | ||
4be44fcd | 665 | static int __init acpi_bus_init(void) |
1da177e4 | 666 | { |
4be44fcd LB |
667 | int result = 0; |
668 | acpi_status status = AE_OK; | |
669 | extern acpi_status acpi_os_initialize1(void); | |
1da177e4 LT |
670 | |
671 | ACPI_FUNCTION_TRACE("acpi_bus_init"); | |
672 | ||
673 | status = acpi_os_initialize1(); | |
674 | ||
4be44fcd LB |
675 | status = |
676 | acpi_enable_subsystem(ACPI_NO_HARDWARE_INIT | ACPI_NO_ACPI_ENABLE); | |
1da177e4 | 677 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
678 | printk(KERN_ERR PREFIX |
679 | "Unable to start the ACPI Interpreter\n"); | |
1da177e4 LT |
680 | goto error1; |
681 | } | |
682 | ||
683 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
684 | printk(KERN_ERR PREFIX |
685 | "Unable to initialize ACPI OS objects\n"); | |
1da177e4 LT |
686 | goto error1; |
687 | } | |
688 | #ifdef CONFIG_ACPI_EC | |
689 | /* | |
690 | * ACPI 2.0 requires the EC driver to be loaded and work before | |
691 | * the EC device is found in the namespace (i.e. before acpi_initialize_objects() | |
692 | * is called). | |
693 | * | |
694 | * This is accomplished by looking for the ECDT table, and getting | |
695 | * the EC parameters out of that. | |
696 | */ | |
697 | status = acpi_ec_ecdt_probe(); | |
698 | /* Ignore result. Not having an ECDT is not fatal. */ | |
699 | #endif | |
700 | ||
701 | status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); | |
702 | if (ACPI_FAILURE(status)) { | |
703 | printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); | |
704 | goto error1; | |
705 | } | |
706 | ||
707 | printk(KERN_INFO PREFIX "Interpreter enabled\n"); | |
708 | ||
709 | /* | |
710 | * Get the system interrupt model and evaluate \_PIC. | |
711 | */ | |
712 | result = acpi_bus_init_irq(); | |
713 | if (result) | |
714 | goto error1; | |
715 | ||
716 | /* | |
717 | * Register the for all standard device notifications. | |
718 | */ | |
4be44fcd LB |
719 | status = |
720 | acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, | |
721 | &acpi_bus_notify, NULL); | |
1da177e4 | 722 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
723 | printk(KERN_ERR PREFIX |
724 | "Unable to register for device notifications\n"); | |
1da177e4 LT |
725 | goto error1; |
726 | } | |
727 | ||
728 | /* | |
729 | * Create the top ACPI proc directory | |
730 | */ | |
731 | acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); | |
732 | ||
733 | return_VALUE(0); | |
734 | ||
735 | /* Mimic structured exception handling */ | |
4be44fcd | 736 | error1: |
1da177e4 LT |
737 | acpi_terminate(); |
738 | return_VALUE(-ENODEV); | |
739 | } | |
740 | ||
4be44fcd | 741 | decl_subsys(acpi, NULL, NULL); |
1da177e4 | 742 | |
4be44fcd | 743 | static int __init acpi_init(void) |
1da177e4 | 744 | { |
4be44fcd | 745 | int result = 0; |
1da177e4 LT |
746 | |
747 | ACPI_FUNCTION_TRACE("acpi_init"); | |
748 | ||
1da177e4 LT |
749 | if (acpi_disabled) { |
750 | printk(KERN_INFO PREFIX "Interpreter disabled.\n"); | |
751 | return_VALUE(-ENODEV); | |
752 | } | |
753 | ||
754 | firmware_register(&acpi_subsys); | |
755 | ||
756 | result = acpi_bus_init(); | |
757 | ||
758 | if (!result) { | |
bca73e4b | 759 | #ifdef CONFIG_PM_LEGACY |
1da177e4 LT |
760 | if (!PM_IS_ACTIVE()) |
761 | pm_active = 1; | |
762 | else { | |
4be44fcd LB |
763 | printk(KERN_INFO PREFIX |
764 | "APM is already active, exiting\n"); | |
1da177e4 LT |
765 | disable_acpi(); |
766 | result = -ENODEV; | |
767 | } | |
768 | #endif | |
769 | } else | |
770 | disable_acpi(); | |
771 | ||
772 | return_VALUE(result); | |
773 | } | |
774 | ||
775 | subsys_initcall(acpi_init); |