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