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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> | |
bca73e4b | 32 | #include <linux/pm_legacy.h> |
1da177e4 LT |
33 | #include <linux/device.h> |
34 | #include <linux/proc_fs.h> | |
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 |
4be44fcd | 42 | ACPI_MODULE_NAME("acpi_bus") |
1da177e4 LT |
43 | #ifdef CONFIG_X86 |
44 | extern void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger); | |
45 | #endif | |
46 | ||
4be44fcd LB |
47 | struct acpi_device *acpi_root; |
48 | struct proc_dir_entry *acpi_root_dir; | |
1da177e4 LT |
49 | EXPORT_SYMBOL(acpi_root_dir); |
50 | ||
51 | #define STRUCT_TO_INT(s) (*((int*)&s)) | |
52 | ||
53 | /* -------------------------------------------------------------------------- | |
54 | Device Management | |
55 | -------------------------------------------------------------------------- */ | |
56 | ||
4be44fcd | 57 | int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device) |
1da177e4 | 58 | { |
4be44fcd | 59 | acpi_status status = AE_OK; |
1da177e4 | 60 | |
1da177e4 LT |
61 | |
62 | if (!device) | |
d550d98d | 63 | return -EINVAL; |
1da177e4 LT |
64 | |
65 | /* TBD: Support fixed-feature devices */ | |
66 | ||
4be44fcd | 67 | status = acpi_get_data(handle, acpi_bus_data_handler, (void **)device); |
1da177e4 | 68 | if (ACPI_FAILURE(status) || !*device) { |
9805cb76 LB |
69 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", |
70 | handle)); | |
d550d98d | 71 | return -ENODEV; |
1da177e4 LT |
72 | } |
73 | ||
d550d98d | 74 | return 0; |
1da177e4 | 75 | } |
4be44fcd | 76 | |
1da177e4 LT |
77 | EXPORT_SYMBOL(acpi_bus_get_device); |
78 | ||
4be44fcd | 79 | int acpi_bus_get_status(struct acpi_device *device) |
1da177e4 | 80 | { |
4be44fcd LB |
81 | acpi_status status = AE_OK; |
82 | unsigned long sta = 0; | |
83 | ||
1da177e4 LT |
84 | |
85 | if (!device) | |
d550d98d | 86 | return -EINVAL; |
1da177e4 LT |
87 | |
88 | /* | |
89 | * Evaluate _STA if present. | |
90 | */ | |
91 | if (device->flags.dynamic_status) { | |
4be44fcd LB |
92 | status = |
93 | acpi_evaluate_integer(device->handle, "_STA", NULL, &sta); | |
1da177e4 | 94 | if (ACPI_FAILURE(status)) |
d550d98d | 95 | return -ENODEV; |
4be44fcd | 96 | STRUCT_TO_INT(device->status) = (int)sta; |
1da177e4 LT |
97 | } |
98 | ||
99 | /* | |
100 | * Otherwise we assume the status of our parent (unless we don't | |
101 | * have one, in which case status is implied). | |
102 | */ | |
103 | else if (device->parent) | |
104 | device->status = device->parent->status; | |
105 | else | |
106 | STRUCT_TO_INT(device->status) = 0x0F; | |
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 LT |
123 | |
124 | /* -------------------------------------------------------------------------- | |
125 | Power Management | |
126 | -------------------------------------------------------------------------- */ | |
127 | ||
4be44fcd | 128 | int acpi_bus_get_power(acpi_handle handle, int *state) |
1da177e4 | 129 | { |
4be44fcd LB |
130 | int result = 0; |
131 | acpi_status status = 0; | |
132 | struct acpi_device *device = NULL; | |
133 | unsigned long psc = 0; | |
1da177e4 | 134 | |
1da177e4 LT |
135 | |
136 | result = acpi_bus_get_device(handle, &device); | |
137 | if (result) | |
d550d98d | 138 | return result; |
1da177e4 LT |
139 | |
140 | *state = ACPI_STATE_UNKNOWN; | |
141 | ||
142 | if (!device->flags.power_manageable) { | |
143 | /* TBD: Non-recursive algorithm for walking up hierarchy */ | |
144 | if (device->parent) | |
145 | *state = device->parent->power.state; | |
146 | else | |
147 | *state = ACPI_STATE_D0; | |
4be44fcd | 148 | } else { |
1da177e4 LT |
149 | /* |
150 | * Get the device's power state either directly (via _PSC) or | |
151 | * indirectly (via power resources). | |
152 | */ | |
153 | if (device->power.flags.explicit_get) { | |
4be44fcd LB |
154 | status = acpi_evaluate_integer(device->handle, "_PSC", |
155 | NULL, &psc); | |
1da177e4 | 156 | if (ACPI_FAILURE(status)) |
d550d98d | 157 | return -ENODEV; |
4be44fcd LB |
158 | device->power.state = (int)psc; |
159 | } else if (device->power.flags.power_resources) { | |
1da177e4 LT |
160 | result = acpi_power_get_inferred_state(device); |
161 | if (result) | |
d550d98d | 162 | return result; |
1da177e4 LT |
163 | } |
164 | ||
165 | *state = device->power.state; | |
166 | } | |
167 | ||
168 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] power state is D%d\n", | |
4be44fcd | 169 | device->pnp.bus_id, device->power.state)); |
1da177e4 | 170 | |
d550d98d | 171 | return 0; |
1da177e4 | 172 | } |
1da177e4 | 173 | |
4be44fcd | 174 | EXPORT_SYMBOL(acpi_bus_get_power); |
1da177e4 | 175 | |
4be44fcd | 176 | int acpi_bus_set_power(acpi_handle handle, int state) |
1da177e4 | 177 | { |
4be44fcd LB |
178 | int result = 0; |
179 | acpi_status status = AE_OK; | |
180 | struct acpi_device *device = NULL; | |
181 | char object_name[5] = { '_', 'P', 'S', '0' + state, '\0' }; | |
1da177e4 | 182 | |
1da177e4 LT |
183 | |
184 | result = acpi_bus_get_device(handle, &device); | |
185 | if (result) | |
d550d98d | 186 | return result; |
1da177e4 LT |
187 | |
188 | if ((state < ACPI_STATE_D0) || (state > ACPI_STATE_D3)) | |
d550d98d | 189 | return -EINVAL; |
1da177e4 LT |
190 | |
191 | /* Make sure this is a valid target state */ | |
192 | ||
193 | if (!device->flags.power_manageable) { | |
9805cb76 | 194 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device `[%s]' is not power manageable\n", |
f883d9db | 195 | device->dev.kobj.name)); |
d550d98d | 196 | return -ENODEV; |
1da177e4 | 197 | } |
b913100d DSL |
198 | /* |
199 | * Get device's current power state if it's unknown | |
200 | * This means device power state isn't initialized or previous setting failed | |
201 | */ | |
0feabb01 KK |
202 | if (!device->flags.force_power_state) { |
203 | if (device->power.state == ACPI_STATE_UNKNOWN) | |
204 | acpi_bus_get_power(device->handle, &device->power.state); | |
205 | if (state == device->power.state) { | |
206 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n", | |
207 | state)); | |
d550d98d | 208 | return 0; |
0feabb01 | 209 | } |
1da177e4 LT |
210 | } |
211 | if (!device->power.states[state].flags.valid) { | |
cece9296 | 212 | printk(KERN_WARNING PREFIX "Device does not support D%d\n", state); |
d550d98d | 213 | return -ENODEV; |
1da177e4 LT |
214 | } |
215 | if (device->parent && (state < device->parent->power.state)) { | |
cece9296 | 216 | printk(KERN_WARNING PREFIX |
a6fc6720 | 217 | "Cannot set device to a higher-powered" |
cece9296 | 218 | " state than parent\n"); |
d550d98d | 219 | return -ENODEV; |
1da177e4 LT |
220 | } |
221 | ||
222 | /* | |
223 | * Transition Power | |
224 | * ---------------- | |
225 | * On transitions to a high-powered state we first apply power (via | |
226 | * power resources) then evalute _PSx. Conversly for transitions to | |
227 | * a lower-powered state. | |
b913100d | 228 | */ |
1da177e4 LT |
229 | if (state < device->power.state) { |
230 | if (device->power.flags.power_resources) { | |
231 | result = acpi_power_transition(device, state); | |
232 | if (result) | |
233 | goto end; | |
234 | } | |
235 | if (device->power.states[state].flags.explicit_set) { | |
4be44fcd LB |
236 | status = acpi_evaluate_object(device->handle, |
237 | object_name, NULL, NULL); | |
1da177e4 LT |
238 | if (ACPI_FAILURE(status)) { |
239 | result = -ENODEV; | |
240 | goto end; | |
241 | } | |
242 | } | |
4be44fcd | 243 | } else { |
1da177e4 | 244 | if (device->power.states[state].flags.explicit_set) { |
4be44fcd LB |
245 | status = acpi_evaluate_object(device->handle, |
246 | object_name, NULL, NULL); | |
1da177e4 LT |
247 | if (ACPI_FAILURE(status)) { |
248 | result = -ENODEV; | |
249 | goto end; | |
250 | } | |
251 | } | |
252 | if (device->power.flags.power_resources) { | |
253 | result = acpi_power_transition(device, state); | |
254 | if (result) | |
255 | goto end; | |
256 | } | |
257 | } | |
258 | ||
4be44fcd | 259 | end: |
1da177e4 | 260 | if (result) |
cece9296 LB |
261 | printk(KERN_WARNING PREFIX |
262 | "Transitioning device [%s] to D%d\n", | |
263 | device->pnp.bus_id, state); | |
1da177e4 | 264 | else |
4be44fcd LB |
265 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
266 | "Device [%s] transitioned to D%d\n", | |
267 | device->pnp.bus_id, state)); | |
1da177e4 | 268 | |
d550d98d | 269 | return result; |
1da177e4 | 270 | } |
1da177e4 | 271 | |
4be44fcd | 272 | EXPORT_SYMBOL(acpi_bus_set_power); |
1da177e4 LT |
273 | |
274 | /* -------------------------------------------------------------------------- | |
275 | Event Management | |
276 | -------------------------------------------------------------------------- */ | |
277 | ||
278 | static DEFINE_SPINLOCK(acpi_bus_event_lock); | |
279 | ||
280 | LIST_HEAD(acpi_bus_event_list); | |
281 | DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue); | |
282 | ||
4be44fcd | 283 | extern int event_is_open; |
1da177e4 | 284 | |
4be44fcd | 285 | int acpi_bus_generate_event(struct acpi_device *device, u8 type, int data) |
1da177e4 | 286 | { |
4be44fcd LB |
287 | struct acpi_bus_event *event = NULL; |
288 | unsigned long flags = 0; | |
1da177e4 | 289 | |
1da177e4 LT |
290 | |
291 | if (!device) | |
d550d98d | 292 | return -EINVAL; |
1da177e4 LT |
293 | |
294 | /* drop event on the floor if no one's listening */ | |
295 | if (!event_is_open) | |
d550d98d | 296 | return 0; |
1da177e4 LT |
297 | |
298 | event = kmalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC); | |
299 | if (!event) | |
d550d98d | 300 | return -ENOMEM; |
1da177e4 LT |
301 | |
302 | strcpy(event->device_class, device->pnp.device_class); | |
303 | strcpy(event->bus_id, device->pnp.bus_id); | |
304 | event->type = type; | |
305 | event->data = data; | |
306 | ||
307 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
308 | list_add_tail(&event->node, &acpi_bus_event_list); | |
309 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); | |
310 | ||
311 | wake_up_interruptible(&acpi_bus_event_queue); | |
312 | ||
d550d98d | 313 | return 0; |
1da177e4 | 314 | } |
4be44fcd | 315 | |
1da177e4 LT |
316 | EXPORT_SYMBOL(acpi_bus_generate_event); |
317 | ||
4be44fcd | 318 | int acpi_bus_receive_event(struct acpi_bus_event *event) |
1da177e4 | 319 | { |
4be44fcd LB |
320 | unsigned long flags = 0; |
321 | struct acpi_bus_event *entry = NULL; | |
1da177e4 LT |
322 | |
323 | DECLARE_WAITQUEUE(wait, current); | |
324 | ||
1da177e4 LT |
325 | |
326 | if (!event) | |
d550d98d | 327 | return -EINVAL; |
1da177e4 LT |
328 | |
329 | if (list_empty(&acpi_bus_event_list)) { | |
330 | ||
331 | set_current_state(TASK_INTERRUPTIBLE); | |
332 | add_wait_queue(&acpi_bus_event_queue, &wait); | |
333 | ||
334 | if (list_empty(&acpi_bus_event_list)) | |
335 | schedule(); | |
336 | ||
337 | remove_wait_queue(&acpi_bus_event_queue, &wait); | |
338 | set_current_state(TASK_RUNNING); | |
339 | ||
340 | if (signal_pending(current)) | |
d550d98d | 341 | return -ERESTARTSYS; |
1da177e4 LT |
342 | } |
343 | ||
344 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
4be44fcd LB |
345 | entry = |
346 | list_entry(acpi_bus_event_list.next, struct acpi_bus_event, node); | |
1da177e4 LT |
347 | if (entry) |
348 | list_del(&entry->node); | |
349 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); | |
350 | ||
351 | if (!entry) | |
d550d98d | 352 | return -ENODEV; |
1da177e4 LT |
353 | |
354 | memcpy(event, entry, sizeof(struct acpi_bus_event)); | |
355 | ||
356 | kfree(entry); | |
357 | ||
d550d98d | 358 | return 0; |
1da177e4 | 359 | } |
1da177e4 | 360 | |
4be44fcd | 361 | EXPORT_SYMBOL(acpi_bus_receive_event); |
1da177e4 LT |
362 | |
363 | /* -------------------------------------------------------------------------- | |
364 | Notification Handling | |
365 | -------------------------------------------------------------------------- */ | |
366 | ||
367 | static int | |
4be44fcd | 368 | acpi_bus_check_device(struct acpi_device *device, int *status_changed) |
1da177e4 | 369 | { |
4be44fcd | 370 | acpi_status status = 0; |
1da177e4 LT |
371 | struct acpi_device_status old_status; |
372 | ||
1da177e4 LT |
373 | |
374 | if (!device) | |
d550d98d | 375 | return -EINVAL; |
1da177e4 LT |
376 | |
377 | if (status_changed) | |
378 | *status_changed = 0; | |
379 | ||
380 | old_status = device->status; | |
381 | ||
382 | /* | |
383 | * Make sure this device's parent is present before we go about | |
384 | * messing with the device. | |
385 | */ | |
386 | if (device->parent && !device->parent->status.present) { | |
387 | device->status = device->parent->status; | |
388 | if (STRUCT_TO_INT(old_status) != STRUCT_TO_INT(device->status)) { | |
389 | if (status_changed) | |
390 | *status_changed = 1; | |
391 | } | |
d550d98d | 392 | return 0; |
1da177e4 LT |
393 | } |
394 | ||
395 | status = acpi_bus_get_status(device); | |
396 | if (ACPI_FAILURE(status)) | |
d550d98d | 397 | return -ENODEV; |
1da177e4 LT |
398 | |
399 | if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status)) | |
d550d98d | 400 | return 0; |
1da177e4 LT |
401 | |
402 | if (status_changed) | |
403 | *status_changed = 1; | |
4be44fcd | 404 | |
1da177e4 LT |
405 | /* |
406 | * Device Insertion/Removal | |
407 | */ | |
408 | if ((device->status.present) && !(old_status.present)) { | |
409 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n")); | |
410 | /* TBD: Handle device insertion */ | |
4be44fcd | 411 | } else if (!(device->status.present) && (old_status.present)) { |
1da177e4 LT |
412 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n")); |
413 | /* TBD: Handle device removal */ | |
414 | } | |
415 | ||
d550d98d | 416 | return 0; |
1da177e4 LT |
417 | } |
418 | ||
4be44fcd | 419 | static int acpi_bus_check_scope(struct acpi_device *device) |
1da177e4 | 420 | { |
4be44fcd LB |
421 | int result = 0; |
422 | int status_changed = 0; | |
1da177e4 | 423 | |
1da177e4 LT |
424 | |
425 | if (!device) | |
d550d98d | 426 | return -EINVAL; |
1da177e4 LT |
427 | |
428 | /* Status Change? */ | |
429 | result = acpi_bus_check_device(device, &status_changed); | |
430 | if (result) | |
d550d98d | 431 | return result; |
1da177e4 LT |
432 | |
433 | if (!status_changed) | |
d550d98d | 434 | return 0; |
1da177e4 LT |
435 | |
436 | /* | |
437 | * TBD: Enumerate child devices within this device's scope and | |
438 | * run acpi_bus_check_device()'s on them. | |
439 | */ | |
440 | ||
d550d98d | 441 | return 0; |
1da177e4 LT |
442 | } |
443 | ||
1da177e4 LT |
444 | /** |
445 | * acpi_bus_notify | |
446 | * --------------- | |
447 | * Callback for all 'system-level' device notifications (values 0x00-0x7F). | |
448 | */ | |
4be44fcd | 449 | static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) |
1da177e4 | 450 | { |
4be44fcd LB |
451 | int result = 0; |
452 | struct acpi_device *device = NULL; | |
1da177e4 | 453 | |
1da177e4 LT |
454 | |
455 | if (acpi_bus_get_device(handle, &device)) | |
d550d98d | 456 | return; |
1da177e4 LT |
457 | |
458 | switch (type) { | |
459 | ||
460 | case ACPI_NOTIFY_BUS_CHECK: | |
4be44fcd LB |
461 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
462 | "Received BUS CHECK notification for device [%s]\n", | |
463 | device->pnp.bus_id)); | |
1da177e4 LT |
464 | result = acpi_bus_check_scope(device); |
465 | /* | |
466 | * TBD: We'll need to outsource certain events to non-ACPI | |
4be44fcd | 467 | * drivers via the device manager (device.c). |
1da177e4 LT |
468 | */ |
469 | break; | |
470 | ||
471 | case ACPI_NOTIFY_DEVICE_CHECK: | |
4be44fcd LB |
472 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
473 | "Received DEVICE CHECK notification for device [%s]\n", | |
474 | device->pnp.bus_id)); | |
1da177e4 LT |
475 | result = acpi_bus_check_device(device, NULL); |
476 | /* | |
477 | * TBD: We'll need to outsource certain events to non-ACPI | |
4be44fcd | 478 | * drivers via the device manager (device.c). |
1da177e4 LT |
479 | */ |
480 | break; | |
481 | ||
482 | case ACPI_NOTIFY_DEVICE_WAKE: | |
4be44fcd LB |
483 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
484 | "Received DEVICE WAKE notification for device [%s]\n", | |
485 | device->pnp.bus_id)); | |
1da177e4 LT |
486 | /* TBD */ |
487 | break; | |
488 | ||
489 | case ACPI_NOTIFY_EJECT_REQUEST: | |
4be44fcd LB |
490 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
491 | "Received EJECT REQUEST notification for device [%s]\n", | |
492 | device->pnp.bus_id)); | |
1da177e4 LT |
493 | /* TBD */ |
494 | break; | |
495 | ||
496 | case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: | |
4be44fcd LB |
497 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
498 | "Received DEVICE CHECK LIGHT notification for device [%s]\n", | |
499 | device->pnp.bus_id)); | |
1da177e4 LT |
500 | /* TBD: Exactly what does 'light' mean? */ |
501 | break; | |
502 | ||
503 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
4be44fcd LB |
504 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
505 | "Received FREQUENCY MISMATCH notification for device [%s]\n", | |
506 | device->pnp.bus_id)); | |
1da177e4 LT |
507 | /* TBD */ |
508 | break; | |
509 | ||
510 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
4be44fcd LB |
511 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
512 | "Received BUS MODE MISMATCH notification for device [%s]\n", | |
513 | device->pnp.bus_id)); | |
1da177e4 LT |
514 | /* TBD */ |
515 | break; | |
516 | ||
517 | case ACPI_NOTIFY_POWER_FAULT: | |
4be44fcd LB |
518 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
519 | "Received POWER FAULT notification for device [%s]\n", | |
520 | device->pnp.bus_id)); | |
1da177e4 LT |
521 | /* TBD */ |
522 | break; | |
523 | ||
524 | default: | |
4be44fcd LB |
525 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
526 | "Received unknown/unsupported notification [%08x]\n", | |
527 | type)); | |
1da177e4 LT |
528 | break; |
529 | } | |
530 | ||
d550d98d | 531 | return; |
1da177e4 LT |
532 | } |
533 | ||
534 | /* -------------------------------------------------------------------------- | |
535 | Initialization/Cleanup | |
536 | -------------------------------------------------------------------------- */ | |
537 | ||
4be44fcd | 538 | static int __init acpi_bus_init_irq(void) |
1da177e4 | 539 | { |
4be44fcd LB |
540 | acpi_status status = AE_OK; |
541 | union acpi_object arg = { ACPI_TYPE_INTEGER }; | |
542 | struct acpi_object_list arg_list = { 1, &arg }; | |
543 | char *message = NULL; | |
1da177e4 | 544 | |
1da177e4 LT |
545 | |
546 | /* | |
547 | * Let the system know what interrupt model we are using by | |
548 | * evaluating the \_PIC object, if exists. | |
549 | */ | |
550 | ||
551 | switch (acpi_irq_model) { | |
552 | case ACPI_IRQ_MODEL_PIC: | |
553 | message = "PIC"; | |
554 | break; | |
555 | case ACPI_IRQ_MODEL_IOAPIC: | |
556 | message = "IOAPIC"; | |
557 | break; | |
558 | case ACPI_IRQ_MODEL_IOSAPIC: | |
559 | message = "IOSAPIC"; | |
560 | break; | |
3948ec94 JK |
561 | case ACPI_IRQ_MODEL_PLATFORM: |
562 | message = "platform specific model"; | |
563 | break; | |
1da177e4 LT |
564 | default: |
565 | printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n"); | |
d550d98d | 566 | return -ENODEV; |
1da177e4 LT |
567 | } |
568 | ||
569 | printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message); | |
570 | ||
571 | arg.integer.value = acpi_irq_model; | |
572 | ||
573 | status = acpi_evaluate_object(NULL, "\\_PIC", &arg_list, NULL); | |
574 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { | |
a6fc6720 | 575 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC")); |
d550d98d | 576 | return -ENODEV; |
1da177e4 LT |
577 | } |
578 | ||
d550d98d | 579 | return 0; |
1da177e4 LT |
580 | } |
581 | ||
ad71860a AS |
582 | acpi_native_uint acpi_gbl_permanent_mmap; |
583 | ||
584 | ||
4be44fcd | 585 | void __init acpi_early_init(void) |
1da177e4 | 586 | { |
4be44fcd | 587 | acpi_status status = AE_OK; |
1da177e4 LT |
588 | |
589 | if (acpi_disabled) | |
d550d98d | 590 | return; |
1da177e4 | 591 | |
61686124 BM |
592 | printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION); |
593 | ||
1da177e4 LT |
594 | /* enable workarounds, unless strict ACPI spec. compliance */ |
595 | if (!acpi_strict) | |
596 | acpi_gbl_enable_interpreter_slack = TRUE; | |
597 | ||
ad71860a AS |
598 | acpi_gbl_permanent_mmap = 1; |
599 | ||
600 | status = acpi_reallocate_root_table(); | |
601 | if (ACPI_FAILURE(status)) { | |
602 | printk(KERN_ERR PREFIX | |
603 | "Unable to reallocate ACPI tables\n"); | |
604 | goto error0; | |
605 | } | |
606 | ||
1da177e4 LT |
607 | status = acpi_initialize_subsystem(); |
608 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
609 | printk(KERN_ERR PREFIX |
610 | "Unable to initialize the ACPI Interpreter\n"); | |
1da177e4 LT |
611 | goto error0; |
612 | } | |
613 | ||
614 | status = acpi_load_tables(); | |
615 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
616 | printk(KERN_ERR PREFIX |
617 | "Unable to load the System Description Tables\n"); | |
1da177e4 LT |
618 | goto error0; |
619 | } | |
620 | ||
1da177e4 LT |
621 | #ifdef CONFIG_X86 |
622 | if (!acpi_ioapic) { | |
5f3b1a8b | 623 | extern u8 acpi_sci_flags; |
1da177e4 LT |
624 | |
625 | /* compatible (0) means level (3) */ | |
5f3b1a8b AS |
626 | if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) { |
627 | acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK; | |
628 | acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL; | |
629 | } | |
1da177e4 | 630 | /* Set PIC-mode SCI trigger type */ |
cee324b1 | 631 | acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt, |
5f3b1a8b | 632 | (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2); |
1da177e4 LT |
633 | } else { |
634 | extern int acpi_sci_override_gsi; | |
635 | /* | |
cee324b1 | 636 | * now that acpi_gbl_FADT is initialized, |
1da177e4 LT |
637 | * update it with result from INT_SRC_OVR parsing |
638 | */ | |
cee324b1 | 639 | acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi; |
1da177e4 LT |
640 | } |
641 | #endif | |
642 | ||
4be44fcd LB |
643 | status = |
644 | acpi_enable_subsystem(~ | |
645 | (ACPI_NO_HARDWARE_INIT | | |
646 | ACPI_NO_ACPI_ENABLE)); | |
1da177e4 LT |
647 | if (ACPI_FAILURE(status)) { |
648 | printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); | |
649 | goto error0; | |
650 | } | |
651 | ||
d550d98d | 652 | return; |
1da177e4 | 653 | |
4be44fcd | 654 | error0: |
1da177e4 | 655 | disable_acpi(); |
d550d98d | 656 | return; |
1da177e4 LT |
657 | } |
658 | ||
4be44fcd | 659 | static int __init acpi_bus_init(void) |
1da177e4 | 660 | { |
4be44fcd LB |
661 | int result = 0; |
662 | acpi_status status = AE_OK; | |
663 | extern acpi_status acpi_os_initialize1(void); | |
1da177e4 | 664 | |
1da177e4 LT |
665 | |
666 | status = acpi_os_initialize1(); | |
667 | ||
4be44fcd LB |
668 | status = |
669 | acpi_enable_subsystem(ACPI_NO_HARDWARE_INIT | ACPI_NO_ACPI_ENABLE); | |
1da177e4 | 670 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
671 | printk(KERN_ERR PREFIX |
672 | "Unable to start the ACPI Interpreter\n"); | |
1da177e4 LT |
673 | goto error1; |
674 | } | |
675 | ||
676 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
677 | printk(KERN_ERR PREFIX |
678 | "Unable to initialize ACPI OS objects\n"); | |
1da177e4 LT |
679 | goto error1; |
680 | } | |
681 | #ifdef CONFIG_ACPI_EC | |
682 | /* | |
683 | * ACPI 2.0 requires the EC driver to be loaded and work before | |
684 | * the EC device is found in the namespace (i.e. before acpi_initialize_objects() | |
685 | * is called). | |
686 | * | |
687 | * This is accomplished by looking for the ECDT table, and getting | |
688 | * the EC parameters out of that. | |
689 | */ | |
690 | status = acpi_ec_ecdt_probe(); | |
691 | /* Ignore result. Not having an ECDT is not fatal. */ | |
692 | #endif | |
693 | ||
694 | status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); | |
695 | if (ACPI_FAILURE(status)) { | |
696 | printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); | |
697 | goto error1; | |
698 | } | |
699 | ||
700 | printk(KERN_INFO PREFIX "Interpreter enabled\n"); | |
701 | ||
702 | /* | |
703 | * Get the system interrupt model and evaluate \_PIC. | |
704 | */ | |
705 | result = acpi_bus_init_irq(); | |
706 | if (result) | |
707 | goto error1; | |
708 | ||
709 | /* | |
710 | * Register the for all standard device notifications. | |
711 | */ | |
4be44fcd LB |
712 | status = |
713 | acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, | |
714 | &acpi_bus_notify, NULL); | |
1da177e4 | 715 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
716 | printk(KERN_ERR PREFIX |
717 | "Unable to register for device notifications\n"); | |
1da177e4 LT |
718 | goto error1; |
719 | } | |
720 | ||
721 | /* | |
722 | * Create the top ACPI proc directory | |
723 | */ | |
724 | acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); | |
725 | ||
d550d98d | 726 | return 0; |
1da177e4 LT |
727 | |
728 | /* Mimic structured exception handling */ | |
4be44fcd | 729 | error1: |
1da177e4 | 730 | acpi_terminate(); |
d550d98d | 731 | return -ENODEV; |
1da177e4 LT |
732 | } |
733 | ||
4be44fcd | 734 | decl_subsys(acpi, NULL, NULL); |
1da177e4 | 735 | |
4be44fcd | 736 | static int __init acpi_init(void) |
1da177e4 | 737 | { |
4be44fcd | 738 | int result = 0; |
1da177e4 | 739 | |
1da177e4 | 740 | |
1da177e4 LT |
741 | if (acpi_disabled) { |
742 | printk(KERN_INFO PREFIX "Interpreter disabled.\n"); | |
d550d98d | 743 | return -ENODEV; |
1da177e4 LT |
744 | } |
745 | ||
d568df84 RD |
746 | result = firmware_register(&acpi_subsys); |
747 | if (result < 0) | |
748 | printk(KERN_WARNING "%s: firmware_register error: %d\n", | |
749 | __FUNCTION__, result); | |
1da177e4 LT |
750 | |
751 | result = acpi_bus_init(); | |
752 | ||
753 | if (!result) { | |
bca73e4b | 754 | #ifdef CONFIG_PM_LEGACY |
1da177e4 LT |
755 | if (!PM_IS_ACTIVE()) |
756 | pm_active = 1; | |
757 | else { | |
4be44fcd LB |
758 | printk(KERN_INFO PREFIX |
759 | "APM is already active, exiting\n"); | |
1da177e4 LT |
760 | disable_acpi(); |
761 | result = -ENODEV; | |
762 | } | |
763 | #endif | |
764 | } else | |
765 | disable_acpi(); | |
766 | ||
d550d98d | 767 | return result; |
1da177e4 LT |
768 | } |
769 | ||
770 | subsys_initcall(acpi_init); |