Commit | Line | Data |
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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 |
f52fd66d | 42 | ACPI_MODULE_NAME("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 | |
0c0e8921 BH |
106 | STRUCT_TO_INT(device->status) = |
107 | ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | | |
108 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; | |
1da177e4 LT |
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 | 151 | /* |
aafbcd16 | 152 | * Get the device's power state either directly (via _PSC) or |
1da177e4 LT |
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) { | |
9805cb76 | 196 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device `[%s]' is not power manageable\n", |
f883d9db | 197 | device->dev.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 | */ | |
b1028c54 KK |
204 | if ((device->power.state == ACPI_STATE_UNKNOWN) || device->flags.force_power_state) |
205 | acpi_bus_get_power(device->handle, &device->power.state); | |
206 | if ((state == device->power.state) && !device->flags.force_power_state) { | |
207 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n", | |
208 | state)); | |
209 | return 0; | |
1da177e4 | 210 | } |
b1028c54 | 211 | |
1da177e4 | 212 | if (!device->power.states[state].flags.valid) { |
cece9296 | 213 | printk(KERN_WARNING PREFIX "Device does not support D%d\n", state); |
d550d98d | 214 | return -ENODEV; |
1da177e4 LT |
215 | } |
216 | if (device->parent && (state < device->parent->power.state)) { | |
cece9296 | 217 | printk(KERN_WARNING PREFIX |
a6fc6720 | 218 | "Cannot set device to a higher-powered" |
cece9296 | 219 | " state than parent\n"); |
d550d98d | 220 | return -ENODEV; |
1da177e4 LT |
221 | } |
222 | ||
223 | /* | |
224 | * Transition Power | |
225 | * ---------------- | |
226 | * On transitions to a high-powered state we first apply power (via | |
227 | * power resources) then evalute _PSx. Conversly for transitions to | |
228 | * a lower-powered state. | |
b913100d | 229 | */ |
1da177e4 LT |
230 | if (state < device->power.state) { |
231 | if (device->power.flags.power_resources) { | |
232 | result = acpi_power_transition(device, state); | |
233 | if (result) | |
234 | goto end; | |
235 | } | |
236 | if (device->power.states[state].flags.explicit_set) { | |
4be44fcd LB |
237 | status = acpi_evaluate_object(device->handle, |
238 | object_name, NULL, NULL); | |
1da177e4 LT |
239 | if (ACPI_FAILURE(status)) { |
240 | result = -ENODEV; | |
241 | goto end; | |
242 | } | |
243 | } | |
4be44fcd | 244 | } else { |
1da177e4 | 245 | if (device->power.states[state].flags.explicit_set) { |
4be44fcd LB |
246 | status = acpi_evaluate_object(device->handle, |
247 | object_name, NULL, NULL); | |
1da177e4 LT |
248 | if (ACPI_FAILURE(status)) { |
249 | result = -ENODEV; | |
250 | goto end; | |
251 | } | |
252 | } | |
253 | if (device->power.flags.power_resources) { | |
254 | result = acpi_power_transition(device, state); | |
255 | if (result) | |
256 | goto end; | |
257 | } | |
258 | } | |
259 | ||
4be44fcd | 260 | end: |
1da177e4 | 261 | if (result) |
cece9296 LB |
262 | printk(KERN_WARNING PREFIX |
263 | "Transitioning device [%s] to D%d\n", | |
264 | device->pnp.bus_id, state); | |
1da177e4 | 265 | else |
4be44fcd LB |
266 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
267 | "Device [%s] transitioned to D%d\n", | |
268 | device->pnp.bus_id, state)); | |
1da177e4 | 269 | |
d550d98d | 270 | return result; |
1da177e4 | 271 | } |
1da177e4 | 272 | |
4be44fcd | 273 | EXPORT_SYMBOL(acpi_bus_set_power); |
1da177e4 LT |
274 | |
275 | /* -------------------------------------------------------------------------- | |
276 | Event Management | |
277 | -------------------------------------------------------------------------- */ | |
278 | ||
279 | static DEFINE_SPINLOCK(acpi_bus_event_lock); | |
280 | ||
281 | LIST_HEAD(acpi_bus_event_list); | |
282 | DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue); | |
283 | ||
4be44fcd | 284 | extern int event_is_open; |
1da177e4 | 285 | |
4be44fcd | 286 | int acpi_bus_generate_event(struct acpi_device *device, u8 type, int data) |
1da177e4 | 287 | { |
4be44fcd LB |
288 | struct acpi_bus_event *event = NULL; |
289 | unsigned long flags = 0; | |
1da177e4 | 290 | |
1da177e4 LT |
291 | |
292 | if (!device) | |
d550d98d | 293 | return -EINVAL; |
1da177e4 LT |
294 | |
295 | /* drop event on the floor if no one's listening */ | |
296 | if (!event_is_open) | |
d550d98d | 297 | return 0; |
1da177e4 LT |
298 | |
299 | event = kmalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC); | |
300 | if (!event) | |
d550d98d | 301 | return -ENOMEM; |
1da177e4 LT |
302 | |
303 | strcpy(event->device_class, device->pnp.device_class); | |
304 | strcpy(event->bus_id, device->pnp.bus_id); | |
305 | event->type = type; | |
306 | event->data = data; | |
307 | ||
308 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
309 | list_add_tail(&event->node, &acpi_bus_event_list); | |
310 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); | |
311 | ||
312 | wake_up_interruptible(&acpi_bus_event_queue); | |
313 | ||
d550d98d | 314 | return 0; |
1da177e4 | 315 | } |
4be44fcd | 316 | |
1da177e4 LT |
317 | EXPORT_SYMBOL(acpi_bus_generate_event); |
318 | ||
4be44fcd | 319 | int acpi_bus_receive_event(struct acpi_bus_event *event) |
1da177e4 | 320 | { |
4be44fcd LB |
321 | unsigned long flags = 0; |
322 | struct acpi_bus_event *entry = NULL; | |
1da177e4 LT |
323 | |
324 | DECLARE_WAITQUEUE(wait, current); | |
325 | ||
1da177e4 LT |
326 | |
327 | if (!event) | |
d550d98d | 328 | return -EINVAL; |
1da177e4 LT |
329 | |
330 | if (list_empty(&acpi_bus_event_list)) { | |
331 | ||
332 | set_current_state(TASK_INTERRUPTIBLE); | |
333 | add_wait_queue(&acpi_bus_event_queue, &wait); | |
334 | ||
335 | if (list_empty(&acpi_bus_event_list)) | |
336 | schedule(); | |
337 | ||
338 | remove_wait_queue(&acpi_bus_event_queue, &wait); | |
339 | set_current_state(TASK_RUNNING); | |
340 | ||
341 | if (signal_pending(current)) | |
d550d98d | 342 | return -ERESTARTSYS; |
1da177e4 LT |
343 | } |
344 | ||
345 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
4be44fcd LB |
346 | entry = |
347 | list_entry(acpi_bus_event_list.next, struct acpi_bus_event, node); | |
1da177e4 LT |
348 | if (entry) |
349 | list_del(&entry->node); | |
350 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); | |
351 | ||
352 | if (!entry) | |
d550d98d | 353 | return -ENODEV; |
1da177e4 LT |
354 | |
355 | memcpy(event, entry, sizeof(struct acpi_bus_event)); | |
356 | ||
357 | kfree(entry); | |
358 | ||
d550d98d | 359 | return 0; |
1da177e4 | 360 | } |
1da177e4 | 361 | |
4be44fcd | 362 | EXPORT_SYMBOL(acpi_bus_receive_event); |
1da177e4 LT |
363 | |
364 | /* -------------------------------------------------------------------------- | |
365 | Notification Handling | |
366 | -------------------------------------------------------------------------- */ | |
367 | ||
368 | static int | |
4be44fcd | 369 | acpi_bus_check_device(struct acpi_device *device, int *status_changed) |
1da177e4 | 370 | { |
4be44fcd | 371 | acpi_status status = 0; |
1da177e4 LT |
372 | struct acpi_device_status old_status; |
373 | ||
1da177e4 LT |
374 | |
375 | if (!device) | |
d550d98d | 376 | return -EINVAL; |
1da177e4 LT |
377 | |
378 | if (status_changed) | |
379 | *status_changed = 0; | |
380 | ||
381 | old_status = device->status; | |
382 | ||
383 | /* | |
384 | * Make sure this device's parent is present before we go about | |
385 | * messing with the device. | |
386 | */ | |
387 | if (device->parent && !device->parent->status.present) { | |
388 | device->status = device->parent->status; | |
389 | if (STRUCT_TO_INT(old_status) != STRUCT_TO_INT(device->status)) { | |
390 | if (status_changed) | |
391 | *status_changed = 1; | |
392 | } | |
d550d98d | 393 | return 0; |
1da177e4 LT |
394 | } |
395 | ||
396 | status = acpi_bus_get_status(device); | |
397 | if (ACPI_FAILURE(status)) | |
d550d98d | 398 | return -ENODEV; |
1da177e4 LT |
399 | |
400 | if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status)) | |
d550d98d | 401 | return 0; |
1da177e4 LT |
402 | |
403 | if (status_changed) | |
404 | *status_changed = 1; | |
4be44fcd | 405 | |
1da177e4 LT |
406 | /* |
407 | * Device Insertion/Removal | |
408 | */ | |
409 | if ((device->status.present) && !(old_status.present)) { | |
410 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n")); | |
411 | /* TBD: Handle device insertion */ | |
4be44fcd | 412 | } else if (!(device->status.present) && (old_status.present)) { |
1da177e4 LT |
413 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n")); |
414 | /* TBD: Handle device removal */ | |
415 | } | |
416 | ||
d550d98d | 417 | return 0; |
1da177e4 LT |
418 | } |
419 | ||
4be44fcd | 420 | static int acpi_bus_check_scope(struct acpi_device *device) |
1da177e4 | 421 | { |
4be44fcd LB |
422 | int result = 0; |
423 | int status_changed = 0; | |
1da177e4 | 424 | |
1da177e4 LT |
425 | |
426 | if (!device) | |
d550d98d | 427 | return -EINVAL; |
1da177e4 LT |
428 | |
429 | /* Status Change? */ | |
430 | result = acpi_bus_check_device(device, &status_changed); | |
431 | if (result) | |
d550d98d | 432 | return result; |
1da177e4 LT |
433 | |
434 | if (!status_changed) | |
d550d98d | 435 | return 0; |
1da177e4 LT |
436 | |
437 | /* | |
438 | * TBD: Enumerate child devices within this device's scope and | |
439 | * run acpi_bus_check_device()'s on them. | |
440 | */ | |
441 | ||
d550d98d | 442 | return 0; |
1da177e4 LT |
443 | } |
444 | ||
1da177e4 LT |
445 | /** |
446 | * acpi_bus_notify | |
447 | * --------------- | |
448 | * Callback for all 'system-level' device notifications (values 0x00-0x7F). | |
449 | */ | |
4be44fcd | 450 | static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) |
1da177e4 | 451 | { |
4be44fcd LB |
452 | int result = 0; |
453 | struct acpi_device *device = NULL; | |
1da177e4 | 454 | |
1da177e4 LT |
455 | |
456 | if (acpi_bus_get_device(handle, &device)) | |
d550d98d | 457 | return; |
1da177e4 LT |
458 | |
459 | switch (type) { | |
460 | ||
461 | case ACPI_NOTIFY_BUS_CHECK: | |
4be44fcd LB |
462 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
463 | "Received BUS CHECK notification for device [%s]\n", | |
464 | device->pnp.bus_id)); | |
1da177e4 | 465 | result = acpi_bus_check_scope(device); |
aafbcd16 | 466 | /* |
1da177e4 | 467 | * TBD: We'll need to outsource certain events to non-ACPI |
4be44fcd | 468 | * drivers via the device manager (device.c). |
1da177e4 LT |
469 | */ |
470 | break; | |
471 | ||
472 | case ACPI_NOTIFY_DEVICE_CHECK: | |
4be44fcd LB |
473 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
474 | "Received DEVICE CHECK notification for device [%s]\n", | |
475 | device->pnp.bus_id)); | |
1da177e4 | 476 | result = acpi_bus_check_device(device, NULL); |
aafbcd16 | 477 | /* |
1da177e4 | 478 | * TBD: We'll need to outsource certain events to non-ACPI |
4be44fcd | 479 | * drivers via the device manager (device.c). |
1da177e4 LT |
480 | */ |
481 | break; | |
482 | ||
483 | case ACPI_NOTIFY_DEVICE_WAKE: | |
4be44fcd LB |
484 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
485 | "Received DEVICE WAKE notification for device [%s]\n", | |
486 | device->pnp.bus_id)); | |
1da177e4 LT |
487 | /* TBD */ |
488 | break; | |
489 | ||
490 | case ACPI_NOTIFY_EJECT_REQUEST: | |
4be44fcd LB |
491 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
492 | "Received EJECT REQUEST notification for device [%s]\n", | |
493 | device->pnp.bus_id)); | |
1da177e4 LT |
494 | /* TBD */ |
495 | break; | |
496 | ||
497 | case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: | |
4be44fcd LB |
498 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
499 | "Received DEVICE CHECK LIGHT notification for device [%s]\n", | |
500 | device->pnp.bus_id)); | |
1da177e4 LT |
501 | /* TBD: Exactly what does 'light' mean? */ |
502 | break; | |
503 | ||
504 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
4be44fcd LB |
505 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
506 | "Received FREQUENCY MISMATCH notification for device [%s]\n", | |
507 | device->pnp.bus_id)); | |
1da177e4 LT |
508 | /* TBD */ |
509 | break; | |
510 | ||
511 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
4be44fcd LB |
512 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
513 | "Received BUS MODE MISMATCH notification for device [%s]\n", | |
514 | device->pnp.bus_id)); | |
1da177e4 LT |
515 | /* TBD */ |
516 | break; | |
517 | ||
518 | case ACPI_NOTIFY_POWER_FAULT: | |
4be44fcd LB |
519 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
520 | "Received POWER FAULT notification for device [%s]\n", | |
521 | device->pnp.bus_id)); | |
1da177e4 LT |
522 | /* TBD */ |
523 | break; | |
524 | ||
525 | default: | |
4be44fcd LB |
526 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
527 | "Received unknown/unsupported notification [%08x]\n", | |
528 | type)); | |
1da177e4 LT |
529 | break; |
530 | } | |
531 | ||
d550d98d | 532 | return; |
1da177e4 LT |
533 | } |
534 | ||
535 | /* -------------------------------------------------------------------------- | |
536 | Initialization/Cleanup | |
537 | -------------------------------------------------------------------------- */ | |
538 | ||
4be44fcd | 539 | static int __init acpi_bus_init_irq(void) |
1da177e4 | 540 | { |
4be44fcd LB |
541 | acpi_status status = AE_OK; |
542 | union acpi_object arg = { ACPI_TYPE_INTEGER }; | |
543 | struct acpi_object_list arg_list = { 1, &arg }; | |
544 | char *message = NULL; | |
1da177e4 | 545 | |
1da177e4 | 546 | |
aafbcd16 | 547 | /* |
1da177e4 LT |
548 | * Let the system know what interrupt model we are using by |
549 | * evaluating the \_PIC object, if exists. | |
550 | */ | |
551 | ||
552 | switch (acpi_irq_model) { | |
553 | case ACPI_IRQ_MODEL_PIC: | |
554 | message = "PIC"; | |
555 | break; | |
556 | case ACPI_IRQ_MODEL_IOAPIC: | |
557 | message = "IOAPIC"; | |
558 | break; | |
559 | case ACPI_IRQ_MODEL_IOSAPIC: | |
560 | message = "IOSAPIC"; | |
561 | break; | |
3948ec94 JK |
562 | case ACPI_IRQ_MODEL_PLATFORM: |
563 | message = "platform specific model"; | |
564 | break; | |
1da177e4 LT |
565 | default: |
566 | printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n"); | |
d550d98d | 567 | return -ENODEV; |
1da177e4 LT |
568 | } |
569 | ||
570 | printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message); | |
571 | ||
572 | arg.integer.value = acpi_irq_model; | |
573 | ||
574 | status = acpi_evaluate_object(NULL, "\\_PIC", &arg_list, NULL); | |
575 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { | |
a6fc6720 | 576 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC")); |
d550d98d | 577 | return -ENODEV; |
1da177e4 LT |
578 | } |
579 | ||
d550d98d | 580 | return 0; |
1da177e4 LT |
581 | } |
582 | ||
ad71860a AS |
583 | acpi_native_uint acpi_gbl_permanent_mmap; |
584 | ||
585 | ||
4be44fcd | 586 | void __init acpi_early_init(void) |
1da177e4 | 587 | { |
4be44fcd | 588 | acpi_status status = AE_OK; |
1da177e4 LT |
589 | |
590 | if (acpi_disabled) | |
d550d98d | 591 | return; |
1da177e4 | 592 | |
61686124 BM |
593 | printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION); |
594 | ||
1da177e4 LT |
595 | /* enable workarounds, unless strict ACPI spec. compliance */ |
596 | if (!acpi_strict) | |
597 | acpi_gbl_enable_interpreter_slack = TRUE; | |
598 | ||
ad71860a AS |
599 | acpi_gbl_permanent_mmap = 1; |
600 | ||
601 | status = acpi_reallocate_root_table(); | |
602 | if (ACPI_FAILURE(status)) { | |
603 | printk(KERN_ERR PREFIX | |
604 | "Unable to reallocate ACPI tables\n"); | |
605 | goto error0; | |
606 | } | |
607 | ||
1da177e4 LT |
608 | status = acpi_initialize_subsystem(); |
609 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
610 | printk(KERN_ERR PREFIX |
611 | "Unable to initialize the ACPI Interpreter\n"); | |
1da177e4 LT |
612 | goto error0; |
613 | } | |
614 | ||
615 | status = acpi_load_tables(); | |
616 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
617 | printk(KERN_ERR PREFIX |
618 | "Unable to load the System Description Tables\n"); | |
1da177e4 LT |
619 | goto error0; |
620 | } | |
621 | ||
1da177e4 LT |
622 | #ifdef CONFIG_X86 |
623 | if (!acpi_ioapic) { | |
5f3b1a8b | 624 | extern u8 acpi_sci_flags; |
1da177e4 LT |
625 | |
626 | /* compatible (0) means level (3) */ | |
5f3b1a8b AS |
627 | if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) { |
628 | acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK; | |
629 | acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL; | |
630 | } | |
1da177e4 | 631 | /* Set PIC-mode SCI trigger type */ |
cee324b1 | 632 | acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt, |
5f3b1a8b | 633 | (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2); |
1da177e4 LT |
634 | } else { |
635 | extern int acpi_sci_override_gsi; | |
636 | /* | |
cee324b1 | 637 | * now that acpi_gbl_FADT is initialized, |
1da177e4 LT |
638 | * update it with result from INT_SRC_OVR parsing |
639 | */ | |
cee324b1 | 640 | acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi; |
1da177e4 LT |
641 | } |
642 | #endif | |
643 | ||
4be44fcd LB |
644 | status = |
645 | acpi_enable_subsystem(~ | |
646 | (ACPI_NO_HARDWARE_INIT | | |
647 | ACPI_NO_ACPI_ENABLE)); | |
1da177e4 LT |
648 | if (ACPI_FAILURE(status)) { |
649 | printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); | |
650 | goto error0; | |
651 | } | |
652 | ||
d550d98d | 653 | return; |
1da177e4 | 654 | |
4be44fcd | 655 | error0: |
1da177e4 | 656 | disable_acpi(); |
d550d98d | 657 | return; |
1da177e4 LT |
658 | } |
659 | ||
4be44fcd | 660 | static int __init acpi_bus_init(void) |
1da177e4 | 661 | { |
4be44fcd LB |
662 | int result = 0; |
663 | acpi_status status = AE_OK; | |
664 | extern acpi_status acpi_os_initialize1(void); | |
1da177e4 | 665 | |
1da177e4 LT |
666 | |
667 | status = acpi_os_initialize1(); | |
668 | ||
4be44fcd LB |
669 | status = |
670 | acpi_enable_subsystem(ACPI_NO_HARDWARE_INIT | ACPI_NO_ACPI_ENABLE); | |
1da177e4 | 671 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
672 | printk(KERN_ERR PREFIX |
673 | "Unable to start the ACPI Interpreter\n"); | |
1da177e4 LT |
674 | goto error1; |
675 | } | |
676 | ||
677 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
678 | printk(KERN_ERR PREFIX |
679 | "Unable to initialize ACPI OS objects\n"); | |
1da177e4 LT |
680 | goto error1; |
681 | } | |
682 | #ifdef CONFIG_ACPI_EC | |
683 | /* | |
684 | * ACPI 2.0 requires the EC driver to be loaded and work before | |
685 | * the EC device is found in the namespace (i.e. before acpi_initialize_objects() | |
686 | * is called). | |
687 | * | |
aafbcd16 | 688 | * This is accomplished by looking for the ECDT table, and getting |
1da177e4 LT |
689 | * the EC parameters out of that. |
690 | */ | |
691 | status = acpi_ec_ecdt_probe(); | |
692 | /* Ignore result. Not having an ECDT is not fatal. */ | |
693 | #endif | |
694 | ||
695 | status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); | |
696 | if (ACPI_FAILURE(status)) { | |
697 | printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); | |
698 | goto error1; | |
699 | } | |
700 | ||
701 | printk(KERN_INFO PREFIX "Interpreter enabled\n"); | |
702 | ||
aafbcd16 AS |
703 | /* Initialize sleep structures */ |
704 | acpi_sleep_init(); | |
705 | ||
1da177e4 LT |
706 | /* |
707 | * Get the system interrupt model and evaluate \_PIC. | |
708 | */ | |
709 | result = acpi_bus_init_irq(); | |
710 | if (result) | |
711 | goto error1; | |
712 | ||
713 | /* | |
714 | * Register the for all standard device notifications. | |
715 | */ | |
4be44fcd LB |
716 | status = |
717 | acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, | |
718 | &acpi_bus_notify, NULL); | |
1da177e4 | 719 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
720 | printk(KERN_ERR PREFIX |
721 | "Unable to register for device notifications\n"); | |
1da177e4 LT |
722 | goto error1; |
723 | } | |
724 | ||
725 | /* | |
726 | * Create the top ACPI proc directory | |
727 | */ | |
728 | acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); | |
729 | ||
d550d98d | 730 | return 0; |
1da177e4 LT |
731 | |
732 | /* Mimic structured exception handling */ | |
4be44fcd | 733 | error1: |
1da177e4 | 734 | acpi_terminate(); |
d550d98d | 735 | return -ENODEV; |
1da177e4 LT |
736 | } |
737 | ||
4be44fcd | 738 | decl_subsys(acpi, NULL, NULL); |
1da177e4 | 739 | |
4be44fcd | 740 | static int __init acpi_init(void) |
1da177e4 | 741 | { |
4be44fcd | 742 | int result = 0; |
1da177e4 | 743 | |
1da177e4 | 744 | |
1da177e4 LT |
745 | if (acpi_disabled) { |
746 | printk(KERN_INFO PREFIX "Interpreter disabled.\n"); | |
d550d98d | 747 | return -ENODEV; |
1da177e4 LT |
748 | } |
749 | ||
d568df84 RD |
750 | result = firmware_register(&acpi_subsys); |
751 | if (result < 0) | |
752 | printk(KERN_WARNING "%s: firmware_register error: %d\n", | |
753 | __FUNCTION__, result); | |
1da177e4 LT |
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 | ||
d550d98d | 771 | return result; |
1da177e4 LT |
772 | } |
773 | ||
774 | subsys_initcall(acpi_init); |