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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 | ||
793c2388 | 47 | struct fadt_descriptor acpi_fadt; |
1da177e4 LT |
48 | EXPORT_SYMBOL(acpi_fadt); |
49 | ||
4be44fcd LB |
50 | struct acpi_device *acpi_root; |
51 | struct proc_dir_entry *acpi_root_dir; | |
1da177e4 LT |
52 | EXPORT_SYMBOL(acpi_root_dir); |
53 | ||
54 | #define STRUCT_TO_INT(s) (*((int*)&s)) | |
55 | ||
56 | /* -------------------------------------------------------------------------- | |
57 | Device Management | |
58 | -------------------------------------------------------------------------- */ | |
59 | ||
4be44fcd | 60 | int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device) |
1da177e4 | 61 | { |
4be44fcd | 62 | acpi_status status = AE_OK; |
1da177e4 | 63 | |
1da177e4 LT |
64 | |
65 | if (!device) | |
d550d98d | 66 | return -EINVAL; |
1da177e4 LT |
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)); |
d550d98d | 73 | return -ENODEV; |
1da177e4 LT |
74 | } |
75 | ||
d550d98d | 76 | return 0; |
1da177e4 | 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 | |
87 | if (!device) | |
d550d98d | 88 | return -EINVAL; |
1da177e4 LT |
89 | |
90 | /* | |
91 | * Evaluate _STA if present. | |
92 | */ | |
93 | if (device->flags.dynamic_status) { | |
4be44fcd LB |
94 | status = |
95 | acpi_evaluate_integer(device->handle, "_STA", NULL, &sta); | |
1da177e4 | 96 | if (ACPI_FAILURE(status)) |
d550d98d | 97 | return -ENODEV; |
4be44fcd | 98 | STRUCT_TO_INT(device->status) = (int)sta; |
1da177e4 LT |
99 | } |
100 | ||
101 | /* | |
102 | * Otherwise we assume the status of our parent (unless we don't | |
103 | * have one, in which case status is implied). | |
104 | */ | |
105 | else if (device->parent) | |
106 | device->status = device->parent->status; | |
107 | else | |
108 | STRUCT_TO_INT(device->status) = 0x0F; | |
109 | ||
110 | if (device->status.functional && !device->status.present) { | |
111 | printk(KERN_WARNING PREFIX "Device [%s] status [%08x]: " | |
4be44fcd LB |
112 | "functional but not present; setting present\n", |
113 | device->pnp.bus_id, (u32) STRUCT_TO_INT(device->status)); | |
1da177e4 LT |
114 | device->status.present = 1; |
115 | } | |
116 | ||
4be44fcd LB |
117 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n", |
118 | device->pnp.bus_id, | |
119 | (u32) STRUCT_TO_INT(device->status))); | |
1da177e4 | 120 | |
d550d98d | 121 | return 0; |
1da177e4 | 122 | } |
1da177e4 | 123 | |
4be44fcd | 124 | EXPORT_SYMBOL(acpi_bus_get_status); |
1da177e4 LT |
125 | |
126 | /* -------------------------------------------------------------------------- | |
127 | Power Management | |
128 | -------------------------------------------------------------------------- */ | |
129 | ||
4be44fcd | 130 | int acpi_bus_get_power(acpi_handle handle, int *state) |
1da177e4 | 131 | { |
4be44fcd LB |
132 | int result = 0; |
133 | acpi_status status = 0; | |
134 | struct acpi_device *device = NULL; | |
135 | unsigned long psc = 0; | |
1da177e4 | 136 | |
1da177e4 LT |
137 | |
138 | result = acpi_bus_get_device(handle, &device); | |
139 | if (result) | |
d550d98d | 140 | return result; |
1da177e4 LT |
141 | |
142 | *state = ACPI_STATE_UNKNOWN; | |
143 | ||
144 | if (!device->flags.power_manageable) { | |
145 | /* TBD: Non-recursive algorithm for walking up hierarchy */ | |
146 | if (device->parent) | |
147 | *state = device->parent->power.state; | |
148 | else | |
149 | *state = ACPI_STATE_D0; | |
4be44fcd | 150 | } else { |
1da177e4 LT |
151 | /* |
152 | * Get the device's power state either directly (via _PSC) or | |
153 | * indirectly (via power resources). | |
154 | */ | |
155 | if (device->power.flags.explicit_get) { | |
4be44fcd LB |
156 | status = acpi_evaluate_integer(device->handle, "_PSC", |
157 | NULL, &psc); | |
1da177e4 | 158 | if (ACPI_FAILURE(status)) |
d550d98d | 159 | return -ENODEV; |
4be44fcd LB |
160 | device->power.state = (int)psc; |
161 | } else if (device->power.flags.power_resources) { | |
1da177e4 LT |
162 | result = acpi_power_get_inferred_state(device); |
163 | if (result) | |
d550d98d | 164 | return result; |
1da177e4 LT |
165 | } |
166 | ||
167 | *state = device->power.state; | |
168 | } | |
169 | ||
170 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] power state is D%d\n", | |
4be44fcd | 171 | device->pnp.bus_id, device->power.state)); |
1da177e4 | 172 | |
d550d98d | 173 | return 0; |
1da177e4 | 174 | } |
1da177e4 | 175 | |
4be44fcd | 176 | EXPORT_SYMBOL(acpi_bus_get_power); |
1da177e4 | 177 | |
4be44fcd | 178 | int acpi_bus_set_power(acpi_handle handle, int state) |
1da177e4 | 179 | { |
4be44fcd LB |
180 | int result = 0; |
181 | acpi_status status = AE_OK; | |
182 | struct acpi_device *device = NULL; | |
183 | char object_name[5] = { '_', 'P', 'S', '0' + state, '\0' }; | |
1da177e4 | 184 | |
1da177e4 LT |
185 | |
186 | result = acpi_bus_get_device(handle, &device); | |
187 | if (result) | |
d550d98d | 188 | return result; |
1da177e4 LT |
189 | |
190 | if ((state < ACPI_STATE_D0) || (state > ACPI_STATE_D3)) | |
d550d98d | 191 | return -EINVAL; |
1da177e4 LT |
192 | |
193 | /* Make sure this is a valid target state */ | |
194 | ||
195 | if (!device->flags.power_manageable) { | |
af4f949c LB |
196 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device `[%s]' is not power manageable", |
197 | device->kobj.name)); | |
d550d98d | 198 | return -ENODEV; |
1da177e4 | 199 | } |
b913100d DSL |
200 | /* |
201 | * Get device's current power state if it's unknown | |
202 | * This means device power state isn't initialized or previous setting failed | |
203 | */ | |
0feabb01 KK |
204 | if (!device->flags.force_power_state) { |
205 | if (device->power.state == ACPI_STATE_UNKNOWN) | |
206 | acpi_bus_get_power(device->handle, &device->power.state); | |
207 | if (state == device->power.state) { | |
208 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n", | |
209 | state)); | |
d550d98d | 210 | return 0; |
0feabb01 | 211 | } |
1da177e4 LT |
212 | } |
213 | if (!device->power.states[state].flags.valid) { | |
cece9296 | 214 | printk(KERN_WARNING PREFIX "Device does not support D%d\n", state); |
d550d98d | 215 | return -ENODEV; |
1da177e4 LT |
216 | } |
217 | if (device->parent && (state < device->parent->power.state)) { | |
cece9296 | 218 | printk(KERN_WARNING PREFIX |
a6fc6720 | 219 | "Cannot set device to a higher-powered" |
cece9296 | 220 | " state than parent\n"); |
d550d98d | 221 | return -ENODEV; |
1da177e4 LT |
222 | } |
223 | ||
224 | /* | |
225 | * Transition Power | |
226 | * ---------------- | |
227 | * On transitions to a high-powered state we first apply power (via | |
228 | * power resources) then evalute _PSx. Conversly for transitions to | |
229 | * a lower-powered state. | |
b913100d | 230 | */ |
1da177e4 LT |
231 | if (state < device->power.state) { |
232 | if (device->power.flags.power_resources) { | |
233 | result = acpi_power_transition(device, state); | |
234 | if (result) | |
235 | goto end; | |
236 | } | |
237 | if (device->power.states[state].flags.explicit_set) { | |
4be44fcd LB |
238 | status = acpi_evaluate_object(device->handle, |
239 | object_name, NULL, NULL); | |
1da177e4 LT |
240 | if (ACPI_FAILURE(status)) { |
241 | result = -ENODEV; | |
242 | goto end; | |
243 | } | |
244 | } | |
4be44fcd | 245 | } else { |
1da177e4 | 246 | if (device->power.states[state].flags.explicit_set) { |
4be44fcd LB |
247 | status = acpi_evaluate_object(device->handle, |
248 | object_name, NULL, NULL); | |
1da177e4 LT |
249 | if (ACPI_FAILURE(status)) { |
250 | result = -ENODEV; | |
251 | goto end; | |
252 | } | |
253 | } | |
254 | if (device->power.flags.power_resources) { | |
255 | result = acpi_power_transition(device, state); | |
256 | if (result) | |
257 | goto end; | |
258 | } | |
259 | } | |
260 | ||
4be44fcd | 261 | end: |
1da177e4 | 262 | if (result) |
cece9296 LB |
263 | printk(KERN_WARNING PREFIX |
264 | "Transitioning device [%s] to D%d\n", | |
265 | device->pnp.bus_id, state); | |
1da177e4 | 266 | else |
4be44fcd LB |
267 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
268 | "Device [%s] transitioned to D%d\n", | |
269 | device->pnp.bus_id, state)); | |
1da177e4 | 270 | |
d550d98d | 271 | return result; |
1da177e4 | 272 | } |
1da177e4 | 273 | |
4be44fcd | 274 | EXPORT_SYMBOL(acpi_bus_set_power); |
1da177e4 LT |
275 | |
276 | /* -------------------------------------------------------------------------- | |
277 | Event Management | |
278 | -------------------------------------------------------------------------- */ | |
279 | ||
280 | static DEFINE_SPINLOCK(acpi_bus_event_lock); | |
281 | ||
282 | LIST_HEAD(acpi_bus_event_list); | |
283 | DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue); | |
284 | ||
4be44fcd | 285 | extern int event_is_open; |
1da177e4 | 286 | |
4be44fcd | 287 | int acpi_bus_generate_event(struct acpi_device *device, u8 type, int data) |
1da177e4 | 288 | { |
4be44fcd LB |
289 | struct acpi_bus_event *event = NULL; |
290 | unsigned long flags = 0; | |
1da177e4 | 291 | |
1da177e4 LT |
292 | |
293 | if (!device) | |
d550d98d | 294 | return -EINVAL; |
1da177e4 LT |
295 | |
296 | /* drop event on the floor if no one's listening */ | |
297 | if (!event_is_open) | |
d550d98d | 298 | return 0; |
1da177e4 LT |
299 | |
300 | event = kmalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC); | |
301 | if (!event) | |
d550d98d | 302 | return -ENOMEM; |
1da177e4 LT |
303 | |
304 | strcpy(event->device_class, device->pnp.device_class); | |
305 | strcpy(event->bus_id, device->pnp.bus_id); | |
306 | event->type = type; | |
307 | event->data = data; | |
308 | ||
309 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
310 | list_add_tail(&event->node, &acpi_bus_event_list); | |
311 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); | |
312 | ||
313 | wake_up_interruptible(&acpi_bus_event_queue); | |
314 | ||
d550d98d | 315 | return 0; |
1da177e4 | 316 | } |
4be44fcd | 317 | |
1da177e4 LT |
318 | EXPORT_SYMBOL(acpi_bus_generate_event); |
319 | ||
4be44fcd | 320 | int acpi_bus_receive_event(struct acpi_bus_event *event) |
1da177e4 | 321 | { |
4be44fcd LB |
322 | unsigned long flags = 0; |
323 | struct acpi_bus_event *entry = NULL; | |
1da177e4 LT |
324 | |
325 | DECLARE_WAITQUEUE(wait, current); | |
326 | ||
1da177e4 LT |
327 | |
328 | if (!event) | |
d550d98d | 329 | return -EINVAL; |
1da177e4 LT |
330 | |
331 | if (list_empty(&acpi_bus_event_list)) { | |
332 | ||
333 | set_current_state(TASK_INTERRUPTIBLE); | |
334 | add_wait_queue(&acpi_bus_event_queue, &wait); | |
335 | ||
336 | if (list_empty(&acpi_bus_event_list)) | |
337 | schedule(); | |
338 | ||
339 | remove_wait_queue(&acpi_bus_event_queue, &wait); | |
340 | set_current_state(TASK_RUNNING); | |
341 | ||
342 | if (signal_pending(current)) | |
d550d98d | 343 | return -ERESTARTSYS; |
1da177e4 LT |
344 | } |
345 | ||
346 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
4be44fcd LB |
347 | entry = |
348 | list_entry(acpi_bus_event_list.next, struct acpi_bus_event, node); | |
1da177e4 LT |
349 | if (entry) |
350 | list_del(&entry->node); | |
351 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); | |
352 | ||
353 | if (!entry) | |
d550d98d | 354 | return -ENODEV; |
1da177e4 LT |
355 | |
356 | memcpy(event, entry, sizeof(struct acpi_bus_event)); | |
357 | ||
358 | kfree(entry); | |
359 | ||
d550d98d | 360 | return 0; |
1da177e4 | 361 | } |
1da177e4 | 362 | |
4be44fcd | 363 | EXPORT_SYMBOL(acpi_bus_receive_event); |
1da177e4 LT |
364 | |
365 | /* -------------------------------------------------------------------------- | |
366 | Notification Handling | |
367 | -------------------------------------------------------------------------- */ | |
368 | ||
369 | static int | |
4be44fcd | 370 | acpi_bus_check_device(struct acpi_device *device, int *status_changed) |
1da177e4 | 371 | { |
4be44fcd | 372 | acpi_status status = 0; |
1da177e4 LT |
373 | struct acpi_device_status old_status; |
374 | ||
1da177e4 LT |
375 | |
376 | if (!device) | |
d550d98d | 377 | return -EINVAL; |
1da177e4 LT |
378 | |
379 | if (status_changed) | |
380 | *status_changed = 0; | |
381 | ||
382 | old_status = device->status; | |
383 | ||
384 | /* | |
385 | * Make sure this device's parent is present before we go about | |
386 | * messing with the device. | |
387 | */ | |
388 | if (device->parent && !device->parent->status.present) { | |
389 | device->status = device->parent->status; | |
390 | if (STRUCT_TO_INT(old_status) != STRUCT_TO_INT(device->status)) { | |
391 | if (status_changed) | |
392 | *status_changed = 1; | |
393 | } | |
d550d98d | 394 | return 0; |
1da177e4 LT |
395 | } |
396 | ||
397 | status = acpi_bus_get_status(device); | |
398 | if (ACPI_FAILURE(status)) | |
d550d98d | 399 | return -ENODEV; |
1da177e4 LT |
400 | |
401 | if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status)) | |
d550d98d | 402 | return 0; |
1da177e4 LT |
403 | |
404 | if (status_changed) | |
405 | *status_changed = 1; | |
4be44fcd | 406 | |
1da177e4 LT |
407 | /* |
408 | * Device Insertion/Removal | |
409 | */ | |
410 | if ((device->status.present) && !(old_status.present)) { | |
411 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n")); | |
412 | /* TBD: Handle device insertion */ | |
4be44fcd | 413 | } else if (!(device->status.present) && (old_status.present)) { |
1da177e4 LT |
414 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n")); |
415 | /* TBD: Handle device removal */ | |
416 | } | |
417 | ||
d550d98d | 418 | return 0; |
1da177e4 LT |
419 | } |
420 | ||
4be44fcd | 421 | static int acpi_bus_check_scope(struct acpi_device *device) |
1da177e4 | 422 | { |
4be44fcd LB |
423 | int result = 0; |
424 | int status_changed = 0; | |
1da177e4 | 425 | |
1da177e4 LT |
426 | |
427 | if (!device) | |
d550d98d | 428 | return -EINVAL; |
1da177e4 LT |
429 | |
430 | /* Status Change? */ | |
431 | result = acpi_bus_check_device(device, &status_changed); | |
432 | if (result) | |
d550d98d | 433 | return result; |
1da177e4 LT |
434 | |
435 | if (!status_changed) | |
d550d98d | 436 | return 0; |
1da177e4 LT |
437 | |
438 | /* | |
439 | * TBD: Enumerate child devices within this device's scope and | |
440 | * run acpi_bus_check_device()'s on them. | |
441 | */ | |
442 | ||
d550d98d | 443 | return 0; |
1da177e4 LT |
444 | } |
445 | ||
1da177e4 LT |
446 | /** |
447 | * acpi_bus_notify | |
448 | * --------------- | |
449 | * Callback for all 'system-level' device notifications (values 0x00-0x7F). | |
450 | */ | |
4be44fcd | 451 | static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) |
1da177e4 | 452 | { |
4be44fcd LB |
453 | int result = 0; |
454 | struct acpi_device *device = NULL; | |
1da177e4 | 455 | |
1da177e4 LT |
456 | |
457 | if (acpi_bus_get_device(handle, &device)) | |
d550d98d | 458 | return; |
1da177e4 LT |
459 | |
460 | switch (type) { | |
461 | ||
462 | case ACPI_NOTIFY_BUS_CHECK: | |
4be44fcd LB |
463 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
464 | "Received BUS CHECK notification for device [%s]\n", | |
465 | device->pnp.bus_id)); | |
1da177e4 LT |
466 | result = acpi_bus_check_scope(device); |
467 | /* | |
468 | * TBD: We'll need to outsource certain events to non-ACPI | |
4be44fcd | 469 | * drivers via the device manager (device.c). |
1da177e4 LT |
470 | */ |
471 | break; | |
472 | ||
473 | case ACPI_NOTIFY_DEVICE_CHECK: | |
4be44fcd LB |
474 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
475 | "Received DEVICE CHECK notification for device [%s]\n", | |
476 | device->pnp.bus_id)); | |
1da177e4 LT |
477 | result = acpi_bus_check_device(device, NULL); |
478 | /* | |
479 | * TBD: We'll need to outsource certain events to non-ACPI | |
4be44fcd | 480 | * drivers via the device manager (device.c). |
1da177e4 LT |
481 | */ |
482 | break; | |
483 | ||
484 | case ACPI_NOTIFY_DEVICE_WAKE: | |
4be44fcd LB |
485 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
486 | "Received DEVICE WAKE notification for device [%s]\n", | |
487 | device->pnp.bus_id)); | |
1da177e4 LT |
488 | /* TBD */ |
489 | break; | |
490 | ||
491 | case ACPI_NOTIFY_EJECT_REQUEST: | |
4be44fcd LB |
492 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
493 | "Received EJECT REQUEST notification for device [%s]\n", | |
494 | device->pnp.bus_id)); | |
1da177e4 LT |
495 | /* TBD */ |
496 | break; | |
497 | ||
498 | case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: | |
4be44fcd LB |
499 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
500 | "Received DEVICE CHECK LIGHT notification for device [%s]\n", | |
501 | device->pnp.bus_id)); | |
1da177e4 LT |
502 | /* TBD: Exactly what does 'light' mean? */ |
503 | break; | |
504 | ||
505 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
4be44fcd LB |
506 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
507 | "Received FREQUENCY MISMATCH notification for device [%s]\n", | |
508 | device->pnp.bus_id)); | |
1da177e4 LT |
509 | /* TBD */ |
510 | break; | |
511 | ||
512 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
4be44fcd LB |
513 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
514 | "Received BUS MODE MISMATCH notification for device [%s]\n", | |
515 | device->pnp.bus_id)); | |
1da177e4 LT |
516 | /* TBD */ |
517 | break; | |
518 | ||
519 | case ACPI_NOTIFY_POWER_FAULT: | |
4be44fcd LB |
520 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
521 | "Received POWER FAULT notification for device [%s]\n", | |
522 | device->pnp.bus_id)); | |
1da177e4 LT |
523 | /* TBD */ |
524 | break; | |
525 | ||
526 | default: | |
4be44fcd LB |
527 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
528 | "Received unknown/unsupported notification [%08x]\n", | |
529 | type)); | |
1da177e4 LT |
530 | break; |
531 | } | |
532 | ||
d550d98d | 533 | return; |
1da177e4 LT |
534 | } |
535 | ||
536 | /* -------------------------------------------------------------------------- | |
537 | Initialization/Cleanup | |
538 | -------------------------------------------------------------------------- */ | |
539 | ||
4be44fcd | 540 | static int __init acpi_bus_init_irq(void) |
1da177e4 | 541 | { |
4be44fcd LB |
542 | acpi_status status = AE_OK; |
543 | union acpi_object arg = { ACPI_TYPE_INTEGER }; | |
544 | struct acpi_object_list arg_list = { 1, &arg }; | |
545 | char *message = NULL; | |
1da177e4 | 546 | |
1da177e4 LT |
547 | |
548 | /* | |
549 | * Let the system know what interrupt model we are using by | |
550 | * evaluating the \_PIC object, if exists. | |
551 | */ | |
552 | ||
553 | switch (acpi_irq_model) { | |
554 | case ACPI_IRQ_MODEL_PIC: | |
555 | message = "PIC"; | |
556 | break; | |
557 | case ACPI_IRQ_MODEL_IOAPIC: | |
558 | message = "IOAPIC"; | |
559 | break; | |
560 | case ACPI_IRQ_MODEL_IOSAPIC: | |
561 | message = "IOSAPIC"; | |
562 | break; | |
563 | default: | |
564 | printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n"); | |
d550d98d | 565 | return -ENODEV; |
1da177e4 LT |
566 | } |
567 | ||
568 | printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message); | |
569 | ||
570 | arg.integer.value = acpi_irq_model; | |
571 | ||
572 | status = acpi_evaluate_object(NULL, "\\_PIC", &arg_list, NULL); | |
573 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { | |
a6fc6720 | 574 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC")); |
d550d98d | 575 | return -ENODEV; |
1da177e4 LT |
576 | } |
577 | ||
d550d98d | 578 | return 0; |
1da177e4 LT |
579 | } |
580 | ||
4be44fcd | 581 | void __init acpi_early_init(void) |
1da177e4 | 582 | { |
4be44fcd LB |
583 | acpi_status status = AE_OK; |
584 | struct acpi_buffer buffer = { sizeof(acpi_fadt), &acpi_fadt }; | |
1da177e4 | 585 | |
1da177e4 LT |
586 | |
587 | if (acpi_disabled) | |
d550d98d | 588 | return; |
1da177e4 | 589 | |
61686124 BM |
590 | printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION); |
591 | ||
1da177e4 LT |
592 | /* enable workarounds, unless strict ACPI spec. compliance */ |
593 | if (!acpi_strict) | |
594 | acpi_gbl_enable_interpreter_slack = TRUE; | |
595 | ||
596 | status = acpi_initialize_subsystem(); | |
597 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
598 | printk(KERN_ERR PREFIX |
599 | "Unable to initialize the ACPI Interpreter\n"); | |
1da177e4 LT |
600 | goto error0; |
601 | } | |
602 | ||
603 | status = acpi_load_tables(); | |
604 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
605 | printk(KERN_ERR PREFIX |
606 | "Unable to load the System Description Tables\n"); | |
1da177e4 LT |
607 | goto error0; |
608 | } | |
609 | ||
610 | /* | |
611 | * Get a separate copy of the FADT for use by other drivers. | |
612 | */ | |
b229cf92 | 613 | status = acpi_get_table(ACPI_TABLE_ID_FADT, 1, &buffer); |
1da177e4 LT |
614 | if (ACPI_FAILURE(status)) { |
615 | printk(KERN_ERR PREFIX "Unable to get the FADT\n"); | |
616 | goto error0; | |
617 | } | |
1da177e4 LT |
618 | #ifdef CONFIG_X86 |
619 | if (!acpi_ioapic) { | |
620 | extern acpi_interrupt_flags acpi_sci_flags; | |
621 | ||
622 | /* compatible (0) means level (3) */ | |
623 | if (acpi_sci_flags.trigger == 0) | |
624 | acpi_sci_flags.trigger = 3; | |
625 | ||
626 | /* Set PIC-mode SCI trigger type */ | |
4be44fcd LB |
627 | acpi_pic_sci_set_trigger(acpi_fadt.sci_int, |
628 | acpi_sci_flags.trigger); | |
1da177e4 LT |
629 | } else { |
630 | extern int acpi_sci_override_gsi; | |
631 | /* | |
632 | * now that acpi_fadt is initialized, | |
633 | * update it with result from INT_SRC_OVR parsing | |
634 | */ | |
635 | acpi_fadt.sci_int = acpi_sci_override_gsi; | |
636 | } | |
637 | #endif | |
638 | ||
4be44fcd LB |
639 | status = |
640 | acpi_enable_subsystem(~ | |
641 | (ACPI_NO_HARDWARE_INIT | | |
642 | ACPI_NO_ACPI_ENABLE)); | |
1da177e4 LT |
643 | if (ACPI_FAILURE(status)) { |
644 | printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); | |
645 | goto error0; | |
646 | } | |
647 | ||
d550d98d | 648 | return; |
1da177e4 | 649 | |
4be44fcd | 650 | error0: |
1da177e4 | 651 | disable_acpi(); |
d550d98d | 652 | return; |
1da177e4 LT |
653 | } |
654 | ||
4be44fcd | 655 | static int __init acpi_bus_init(void) |
1da177e4 | 656 | { |
4be44fcd LB |
657 | int result = 0; |
658 | acpi_status status = AE_OK; | |
659 | extern acpi_status acpi_os_initialize1(void); | |
1da177e4 | 660 | |
1da177e4 LT |
661 | |
662 | status = acpi_os_initialize1(); | |
663 | ||
4be44fcd LB |
664 | status = |
665 | acpi_enable_subsystem(ACPI_NO_HARDWARE_INIT | ACPI_NO_ACPI_ENABLE); | |
1da177e4 | 666 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
667 | printk(KERN_ERR PREFIX |
668 | "Unable to start the ACPI Interpreter\n"); | |
1da177e4 LT |
669 | goto error1; |
670 | } | |
671 | ||
672 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
673 | printk(KERN_ERR PREFIX |
674 | "Unable to initialize ACPI OS objects\n"); | |
1da177e4 LT |
675 | goto error1; |
676 | } | |
677 | #ifdef CONFIG_ACPI_EC | |
678 | /* | |
679 | * ACPI 2.0 requires the EC driver to be loaded and work before | |
680 | * the EC device is found in the namespace (i.e. before acpi_initialize_objects() | |
681 | * is called). | |
682 | * | |
683 | * This is accomplished by looking for the ECDT table, and getting | |
684 | * the EC parameters out of that. | |
685 | */ | |
686 | status = acpi_ec_ecdt_probe(); | |
687 | /* Ignore result. Not having an ECDT is not fatal. */ | |
688 | #endif | |
689 | ||
690 | status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); | |
691 | if (ACPI_FAILURE(status)) { | |
692 | printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); | |
693 | goto error1; | |
694 | } | |
695 | ||
696 | printk(KERN_INFO PREFIX "Interpreter enabled\n"); | |
697 | ||
698 | /* | |
699 | * Get the system interrupt model and evaluate \_PIC. | |
700 | */ | |
701 | result = acpi_bus_init_irq(); | |
702 | if (result) | |
703 | goto error1; | |
704 | ||
705 | /* | |
706 | * Register the for all standard device notifications. | |
707 | */ | |
4be44fcd LB |
708 | status = |
709 | acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, | |
710 | &acpi_bus_notify, NULL); | |
1da177e4 | 711 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
712 | printk(KERN_ERR PREFIX |
713 | "Unable to register for device notifications\n"); | |
1da177e4 LT |
714 | goto error1; |
715 | } | |
716 | ||
717 | /* | |
718 | * Create the top ACPI proc directory | |
719 | */ | |
720 | acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); | |
721 | ||
d550d98d | 722 | return 0; |
1da177e4 LT |
723 | |
724 | /* Mimic structured exception handling */ | |
4be44fcd | 725 | error1: |
1da177e4 | 726 | acpi_terminate(); |
d550d98d | 727 | return -ENODEV; |
1da177e4 LT |
728 | } |
729 | ||
4be44fcd | 730 | decl_subsys(acpi, NULL, NULL); |
1da177e4 | 731 | |
4be44fcd | 732 | static int __init acpi_init(void) |
1da177e4 | 733 | { |
4be44fcd | 734 | int result = 0; |
1da177e4 | 735 | |
1da177e4 | 736 | |
1da177e4 LT |
737 | if (acpi_disabled) { |
738 | printk(KERN_INFO PREFIX "Interpreter disabled.\n"); | |
d550d98d | 739 | return -ENODEV; |
1da177e4 LT |
740 | } |
741 | ||
d568df84 RD |
742 | result = firmware_register(&acpi_subsys); |
743 | if (result < 0) | |
744 | printk(KERN_WARNING "%s: firmware_register error: %d\n", | |
745 | __FUNCTION__, result); | |
1da177e4 LT |
746 | |
747 | result = acpi_bus_init(); | |
748 | ||
749 | if (!result) { | |
bca73e4b | 750 | #ifdef CONFIG_PM_LEGACY |
1da177e4 LT |
751 | if (!PM_IS_ACTIVE()) |
752 | pm_active = 1; | |
753 | else { | |
4be44fcd LB |
754 | printk(KERN_INFO PREFIX |
755 | "APM is already active, exiting\n"); | |
1da177e4 LT |
756 | disable_acpi(); |
757 | result = -ENODEV; | |
758 | } | |
759 | #endif | |
760 | } else | |
761 | disable_acpi(); | |
762 | ||
d550d98d | 763 | return result; |
1da177e4 LT |
764 | } |
765 | ||
766 | subsys_initcall(acpi_init); |