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 |
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) { |
9805cb76 LB |
72 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", |
73 | handle)); | |
d550d98d | 74 | return -ENODEV; |
1da177e4 LT |
75 | } |
76 | ||
d550d98d | 77 | return 0; |
1da177e4 | 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 | |
88 | if (!device) | |
d550d98d | 89 | return -EINVAL; |
1da177e4 LT |
90 | |
91 | /* | |
92 | * Evaluate _STA if present. | |
93 | */ | |
94 | if (device->flags.dynamic_status) { | |
4be44fcd LB |
95 | status = |
96 | acpi_evaluate_integer(device->handle, "_STA", NULL, &sta); | |
1da177e4 | 97 | if (ACPI_FAILURE(status)) |
d550d98d | 98 | return -ENODEV; |
4be44fcd | 99 | STRUCT_TO_INT(device->status) = (int)sta; |
1da177e4 LT |
100 | } |
101 | ||
102 | /* | |
103 | * Otherwise we assume the status of our parent (unless we don't | |
104 | * have one, in which case status is implied). | |
105 | */ | |
106 | else if (device->parent) | |
107 | device->status = device->parent->status; | |
108 | else | |
109 | STRUCT_TO_INT(device->status) = 0x0F; | |
110 | ||
111 | if (device->status.functional && !device->status.present) { | |
112 | printk(KERN_WARNING PREFIX "Device [%s] status [%08x]: " | |
4be44fcd LB |
113 | "functional but not present; setting present\n", |
114 | device->pnp.bus_id, (u32) STRUCT_TO_INT(device->status)); | |
1da177e4 LT |
115 | device->status.present = 1; |
116 | } | |
117 | ||
4be44fcd LB |
118 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n", |
119 | device->pnp.bus_id, | |
120 | (u32) STRUCT_TO_INT(device->status))); | |
1da177e4 | 121 | |
d550d98d | 122 | return 0; |
1da177e4 | 123 | } |
1da177e4 | 124 | |
4be44fcd | 125 | EXPORT_SYMBOL(acpi_bus_get_status); |
1da177e4 LT |
126 | |
127 | /* -------------------------------------------------------------------------- | |
128 | Power Management | |
129 | -------------------------------------------------------------------------- */ | |
130 | ||
4be44fcd | 131 | int acpi_bus_get_power(acpi_handle handle, int *state) |
1da177e4 | 132 | { |
4be44fcd LB |
133 | int result = 0; |
134 | acpi_status status = 0; | |
135 | struct acpi_device *device = NULL; | |
136 | unsigned long psc = 0; | |
1da177e4 | 137 | |
1da177e4 LT |
138 | |
139 | result = acpi_bus_get_device(handle, &device); | |
140 | if (result) | |
d550d98d | 141 | return result; |
1da177e4 LT |
142 | |
143 | *state = ACPI_STATE_UNKNOWN; | |
144 | ||
145 | if (!device->flags.power_manageable) { | |
146 | /* TBD: Non-recursive algorithm for walking up hierarchy */ | |
147 | if (device->parent) | |
148 | *state = device->parent->power.state; | |
149 | else | |
150 | *state = ACPI_STATE_D0; | |
4be44fcd | 151 | } else { |
1da177e4 LT |
152 | /* |
153 | * Get the device's power state either directly (via _PSC) or | |
154 | * indirectly (via power resources). | |
155 | */ | |
156 | if (device->power.flags.explicit_get) { | |
4be44fcd LB |
157 | status = acpi_evaluate_integer(device->handle, "_PSC", |
158 | NULL, &psc); | |
1da177e4 | 159 | if (ACPI_FAILURE(status)) |
d550d98d | 160 | return -ENODEV; |
4be44fcd LB |
161 | device->power.state = (int)psc; |
162 | } else if (device->power.flags.power_resources) { | |
1da177e4 LT |
163 | result = acpi_power_get_inferred_state(device); |
164 | if (result) | |
d550d98d | 165 | return result; |
1da177e4 LT |
166 | } |
167 | ||
168 | *state = device->power.state; | |
169 | } | |
170 | ||
171 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] power state is D%d\n", | |
4be44fcd | 172 | device->pnp.bus_id, device->power.state)); |
1da177e4 | 173 | |
d550d98d | 174 | return 0; |
1da177e4 | 175 | } |
1da177e4 | 176 | |
4be44fcd | 177 | EXPORT_SYMBOL(acpi_bus_get_power); |
1da177e4 | 178 | |
4be44fcd | 179 | int acpi_bus_set_power(acpi_handle handle, int state) |
1da177e4 | 180 | { |
4be44fcd LB |
181 | int result = 0; |
182 | acpi_status status = AE_OK; | |
183 | struct acpi_device *device = NULL; | |
184 | char object_name[5] = { '_', 'P', 'S', '0' + state, '\0' }; | |
1da177e4 | 185 | |
1da177e4 LT |
186 | |
187 | result = acpi_bus_get_device(handle, &device); | |
188 | if (result) | |
d550d98d | 189 | return result; |
1da177e4 LT |
190 | |
191 | if ((state < ACPI_STATE_D0) || (state > ACPI_STATE_D3)) | |
d550d98d | 192 | return -EINVAL; |
1da177e4 LT |
193 | |
194 | /* Make sure this is a valid target state */ | |
195 | ||
196 | if (!device->flags.power_manageable) { | |
9805cb76 | 197 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device `[%s]' is not power manageable\n", |
af4f949c | 198 | device->kobj.name)); |
d550d98d | 199 | return -ENODEV; |
1da177e4 | 200 | } |
b913100d DSL |
201 | /* |
202 | * Get device's current power state if it's unknown | |
203 | * This means device power state isn't initialized or previous setting failed | |
204 | */ | |
0feabb01 KK |
205 | if (!device->flags.force_power_state) { |
206 | if (device->power.state == ACPI_STATE_UNKNOWN) | |
207 | acpi_bus_get_power(device->handle, &device->power.state); | |
208 | if (state == device->power.state) { | |
209 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n", | |
210 | state)); | |
d550d98d | 211 | return 0; |
0feabb01 | 212 | } |
1da177e4 LT |
213 | } |
214 | if (!device->power.states[state].flags.valid) { | |
cece9296 | 215 | printk(KERN_WARNING PREFIX "Device does not support D%d\n", state); |
d550d98d | 216 | return -ENODEV; |
1da177e4 LT |
217 | } |
218 | if (device->parent && (state < device->parent->power.state)) { | |
cece9296 | 219 | printk(KERN_WARNING PREFIX |
a6fc6720 | 220 | "Cannot set device to a higher-powered" |
cece9296 | 221 | " state than parent\n"); |
d550d98d | 222 | return -ENODEV; |
1da177e4 LT |
223 | } |
224 | ||
225 | /* | |
226 | * Transition Power | |
227 | * ---------------- | |
228 | * On transitions to a high-powered state we first apply power (via | |
229 | * power resources) then evalute _PSx. Conversly for transitions to | |
230 | * a lower-powered state. | |
b913100d | 231 | */ |
1da177e4 LT |
232 | if (state < device->power.state) { |
233 | if (device->power.flags.power_resources) { | |
234 | result = acpi_power_transition(device, state); | |
235 | if (result) | |
236 | goto end; | |
237 | } | |
238 | if (device->power.states[state].flags.explicit_set) { | |
4be44fcd LB |
239 | status = acpi_evaluate_object(device->handle, |
240 | object_name, NULL, NULL); | |
1da177e4 LT |
241 | if (ACPI_FAILURE(status)) { |
242 | result = -ENODEV; | |
243 | goto end; | |
244 | } | |
245 | } | |
4be44fcd | 246 | } else { |
1da177e4 | 247 | if (device->power.states[state].flags.explicit_set) { |
4be44fcd LB |
248 | status = acpi_evaluate_object(device->handle, |
249 | object_name, NULL, NULL); | |
1da177e4 LT |
250 | if (ACPI_FAILURE(status)) { |
251 | result = -ENODEV; | |
252 | goto end; | |
253 | } | |
254 | } | |
255 | if (device->power.flags.power_resources) { | |
256 | result = acpi_power_transition(device, state); | |
257 | if (result) | |
258 | goto end; | |
259 | } | |
260 | } | |
261 | ||
4be44fcd | 262 | end: |
1da177e4 | 263 | if (result) |
cece9296 LB |
264 | printk(KERN_WARNING PREFIX |
265 | "Transitioning device [%s] to D%d\n", | |
266 | device->pnp.bus_id, state); | |
1da177e4 | 267 | else |
4be44fcd LB |
268 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
269 | "Device [%s] transitioned to D%d\n", | |
270 | device->pnp.bus_id, state)); | |
1da177e4 | 271 | |
d550d98d | 272 | return result; |
1da177e4 | 273 | } |
1da177e4 | 274 | |
4be44fcd | 275 | EXPORT_SYMBOL(acpi_bus_set_power); |
1da177e4 LT |
276 | |
277 | /* -------------------------------------------------------------------------- | |
278 | Event Management | |
279 | -------------------------------------------------------------------------- */ | |
280 | ||
281 | static DEFINE_SPINLOCK(acpi_bus_event_lock); | |
282 | ||
283 | LIST_HEAD(acpi_bus_event_list); | |
284 | DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue); | |
285 | ||
4be44fcd | 286 | extern int event_is_open; |
1da177e4 | 287 | |
4be44fcd | 288 | int acpi_bus_generate_event(struct acpi_device *device, u8 type, int data) |
1da177e4 | 289 | { |
4be44fcd LB |
290 | struct acpi_bus_event *event = NULL; |
291 | unsigned long flags = 0; | |
1da177e4 | 292 | |
1da177e4 LT |
293 | |
294 | if (!device) | |
d550d98d | 295 | return -EINVAL; |
1da177e4 LT |
296 | |
297 | /* drop event on the floor if no one's listening */ | |
298 | if (!event_is_open) | |
d550d98d | 299 | return 0; |
1da177e4 LT |
300 | |
301 | event = kmalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC); | |
302 | if (!event) | |
d550d98d | 303 | return -ENOMEM; |
1da177e4 LT |
304 | |
305 | strcpy(event->device_class, device->pnp.device_class); | |
306 | strcpy(event->bus_id, device->pnp.bus_id); | |
307 | event->type = type; | |
308 | event->data = data; | |
309 | ||
310 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
311 | list_add_tail(&event->node, &acpi_bus_event_list); | |
312 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); | |
313 | ||
314 | wake_up_interruptible(&acpi_bus_event_queue); | |
315 | ||
d550d98d | 316 | return 0; |
1da177e4 | 317 | } |
4be44fcd | 318 | |
1da177e4 LT |
319 | EXPORT_SYMBOL(acpi_bus_generate_event); |
320 | ||
4be44fcd | 321 | int acpi_bus_receive_event(struct acpi_bus_event *event) |
1da177e4 | 322 | { |
4be44fcd LB |
323 | unsigned long flags = 0; |
324 | struct acpi_bus_event *entry = NULL; | |
1da177e4 LT |
325 | |
326 | DECLARE_WAITQUEUE(wait, current); | |
327 | ||
1da177e4 LT |
328 | |
329 | if (!event) | |
d550d98d | 330 | return -EINVAL; |
1da177e4 LT |
331 | |
332 | if (list_empty(&acpi_bus_event_list)) { | |
333 | ||
334 | set_current_state(TASK_INTERRUPTIBLE); | |
335 | add_wait_queue(&acpi_bus_event_queue, &wait); | |
336 | ||
337 | if (list_empty(&acpi_bus_event_list)) | |
338 | schedule(); | |
339 | ||
340 | remove_wait_queue(&acpi_bus_event_queue, &wait); | |
341 | set_current_state(TASK_RUNNING); | |
342 | ||
343 | if (signal_pending(current)) | |
d550d98d | 344 | return -ERESTARTSYS; |
1da177e4 LT |
345 | } |
346 | ||
347 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
4be44fcd LB |
348 | entry = |
349 | list_entry(acpi_bus_event_list.next, struct acpi_bus_event, node); | |
1da177e4 LT |
350 | if (entry) |
351 | list_del(&entry->node); | |
352 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); | |
353 | ||
354 | if (!entry) | |
d550d98d | 355 | return -ENODEV; |
1da177e4 LT |
356 | |
357 | memcpy(event, entry, sizeof(struct acpi_bus_event)); | |
358 | ||
359 | kfree(entry); | |
360 | ||
d550d98d | 361 | return 0; |
1da177e4 | 362 | } |
1da177e4 | 363 | |
4be44fcd | 364 | EXPORT_SYMBOL(acpi_bus_receive_event); |
1da177e4 LT |
365 | |
366 | /* -------------------------------------------------------------------------- | |
367 | Notification Handling | |
368 | -------------------------------------------------------------------------- */ | |
369 | ||
370 | static int | |
4be44fcd | 371 | acpi_bus_check_device(struct acpi_device *device, int *status_changed) |
1da177e4 | 372 | { |
4be44fcd | 373 | acpi_status status = 0; |
1da177e4 LT |
374 | struct acpi_device_status old_status; |
375 | ||
1da177e4 LT |
376 | |
377 | if (!device) | |
d550d98d | 378 | return -EINVAL; |
1da177e4 LT |
379 | |
380 | if (status_changed) | |
381 | *status_changed = 0; | |
382 | ||
383 | old_status = device->status; | |
384 | ||
385 | /* | |
386 | * Make sure this device's parent is present before we go about | |
387 | * messing with the device. | |
388 | */ | |
389 | if (device->parent && !device->parent->status.present) { | |
390 | device->status = device->parent->status; | |
391 | if (STRUCT_TO_INT(old_status) != STRUCT_TO_INT(device->status)) { | |
392 | if (status_changed) | |
393 | *status_changed = 1; | |
394 | } | |
d550d98d | 395 | return 0; |
1da177e4 LT |
396 | } |
397 | ||
398 | status = acpi_bus_get_status(device); | |
399 | if (ACPI_FAILURE(status)) | |
d550d98d | 400 | return -ENODEV; |
1da177e4 LT |
401 | |
402 | if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status)) | |
d550d98d | 403 | return 0; |
1da177e4 LT |
404 | |
405 | if (status_changed) | |
406 | *status_changed = 1; | |
4be44fcd | 407 | |
1da177e4 LT |
408 | /* |
409 | * Device Insertion/Removal | |
410 | */ | |
411 | if ((device->status.present) && !(old_status.present)) { | |
412 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n")); | |
413 | /* TBD: Handle device insertion */ | |
4be44fcd | 414 | } else if (!(device->status.present) && (old_status.present)) { |
1da177e4 LT |
415 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n")); |
416 | /* TBD: Handle device removal */ | |
417 | } | |
418 | ||
d550d98d | 419 | return 0; |
1da177e4 LT |
420 | } |
421 | ||
4be44fcd | 422 | static int acpi_bus_check_scope(struct acpi_device *device) |
1da177e4 | 423 | { |
4be44fcd LB |
424 | int result = 0; |
425 | int status_changed = 0; | |
1da177e4 | 426 | |
1da177e4 LT |
427 | |
428 | if (!device) | |
d550d98d | 429 | return -EINVAL; |
1da177e4 LT |
430 | |
431 | /* Status Change? */ | |
432 | result = acpi_bus_check_device(device, &status_changed); | |
433 | if (result) | |
d550d98d | 434 | return result; |
1da177e4 LT |
435 | |
436 | if (!status_changed) | |
d550d98d | 437 | return 0; |
1da177e4 LT |
438 | |
439 | /* | |
440 | * TBD: Enumerate child devices within this device's scope and | |
441 | * run acpi_bus_check_device()'s on them. | |
442 | */ | |
443 | ||
d550d98d | 444 | return 0; |
1da177e4 LT |
445 | } |
446 | ||
1da177e4 LT |
447 | /** |
448 | * acpi_bus_notify | |
449 | * --------------- | |
450 | * Callback for all 'system-level' device notifications (values 0x00-0x7F). | |
451 | */ | |
4be44fcd | 452 | static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) |
1da177e4 | 453 | { |
4be44fcd LB |
454 | int result = 0; |
455 | struct acpi_device *device = NULL; | |
1da177e4 | 456 | |
1da177e4 LT |
457 | |
458 | if (acpi_bus_get_device(handle, &device)) | |
d550d98d | 459 | return; |
1da177e4 LT |
460 | |
461 | switch (type) { | |
462 | ||
463 | case ACPI_NOTIFY_BUS_CHECK: | |
4be44fcd LB |
464 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
465 | "Received BUS CHECK notification for device [%s]\n", | |
466 | device->pnp.bus_id)); | |
1da177e4 LT |
467 | result = acpi_bus_check_scope(device); |
468 | /* | |
469 | * TBD: We'll need to outsource certain events to non-ACPI | |
4be44fcd | 470 | * drivers via the device manager (device.c). |
1da177e4 LT |
471 | */ |
472 | break; | |
473 | ||
474 | case ACPI_NOTIFY_DEVICE_CHECK: | |
4be44fcd LB |
475 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
476 | "Received DEVICE CHECK notification for device [%s]\n", | |
477 | device->pnp.bus_id)); | |
1da177e4 LT |
478 | result = acpi_bus_check_device(device, NULL); |
479 | /* | |
480 | * TBD: We'll need to outsource certain events to non-ACPI | |
4be44fcd | 481 | * drivers via the device manager (device.c). |
1da177e4 LT |
482 | */ |
483 | break; | |
484 | ||
485 | case ACPI_NOTIFY_DEVICE_WAKE: | |
4be44fcd LB |
486 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
487 | "Received DEVICE WAKE notification for device [%s]\n", | |
488 | device->pnp.bus_id)); | |
1da177e4 LT |
489 | /* TBD */ |
490 | break; | |
491 | ||
492 | case ACPI_NOTIFY_EJECT_REQUEST: | |
4be44fcd LB |
493 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
494 | "Received EJECT REQUEST notification for device [%s]\n", | |
495 | device->pnp.bus_id)); | |
1da177e4 LT |
496 | /* TBD */ |
497 | break; | |
498 | ||
499 | case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: | |
4be44fcd LB |
500 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
501 | "Received DEVICE CHECK LIGHT notification for device [%s]\n", | |
502 | device->pnp.bus_id)); | |
1da177e4 LT |
503 | /* TBD: Exactly what does 'light' mean? */ |
504 | break; | |
505 | ||
506 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
4be44fcd LB |
507 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
508 | "Received FREQUENCY MISMATCH notification for device [%s]\n", | |
509 | device->pnp.bus_id)); | |
1da177e4 LT |
510 | /* TBD */ |
511 | break; | |
512 | ||
513 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
4be44fcd LB |
514 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
515 | "Received BUS MODE MISMATCH notification for device [%s]\n", | |
516 | device->pnp.bus_id)); | |
1da177e4 LT |
517 | /* TBD */ |
518 | break; | |
519 | ||
520 | case ACPI_NOTIFY_POWER_FAULT: | |
4be44fcd LB |
521 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
522 | "Received POWER FAULT notification for device [%s]\n", | |
523 | device->pnp.bus_id)); | |
1da177e4 LT |
524 | /* TBD */ |
525 | break; | |
526 | ||
527 | default: | |
4be44fcd LB |
528 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
529 | "Received unknown/unsupported notification [%08x]\n", | |
530 | type)); | |
1da177e4 LT |
531 | break; |
532 | } | |
533 | ||
d550d98d | 534 | return; |
1da177e4 LT |
535 | } |
536 | ||
537 | /* -------------------------------------------------------------------------- | |
538 | Initialization/Cleanup | |
539 | -------------------------------------------------------------------------- */ | |
540 | ||
4be44fcd | 541 | static int __init acpi_bus_init_irq(void) |
1da177e4 | 542 | { |
4be44fcd LB |
543 | acpi_status status = AE_OK; |
544 | union acpi_object arg = { ACPI_TYPE_INTEGER }; | |
545 | struct acpi_object_list arg_list = { 1, &arg }; | |
546 | char *message = NULL; | |
1da177e4 | 547 | |
1da177e4 LT |
548 | |
549 | /* | |
550 | * Let the system know what interrupt model we are using by | |
551 | * evaluating the \_PIC object, if exists. | |
552 | */ | |
553 | ||
554 | switch (acpi_irq_model) { | |
555 | case ACPI_IRQ_MODEL_PIC: | |
556 | message = "PIC"; | |
557 | break; | |
558 | case ACPI_IRQ_MODEL_IOAPIC: | |
559 | message = "IOAPIC"; | |
560 | break; | |
561 | case ACPI_IRQ_MODEL_IOSAPIC: | |
562 | message = "IOSAPIC"; | |
563 | break; | |
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 | ||
4be44fcd | 582 | void __init acpi_early_init(void) |
1da177e4 | 583 | { |
4be44fcd LB |
584 | acpi_status status = AE_OK; |
585 | struct acpi_buffer buffer = { sizeof(acpi_fadt), &acpi_fadt }; | |
1da177e4 | 586 | |
1da177e4 LT |
587 | |
588 | if (acpi_disabled) | |
d550d98d | 589 | return; |
1da177e4 | 590 | |
61686124 BM |
591 | printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION); |
592 | ||
1da177e4 LT |
593 | /* enable workarounds, unless strict ACPI spec. compliance */ |
594 | if (!acpi_strict) | |
595 | acpi_gbl_enable_interpreter_slack = TRUE; | |
596 | ||
597 | status = acpi_initialize_subsystem(); | |
598 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
599 | printk(KERN_ERR PREFIX |
600 | "Unable to initialize the ACPI Interpreter\n"); | |
1da177e4 LT |
601 | goto error0; |
602 | } | |
603 | ||
604 | status = acpi_load_tables(); | |
605 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
606 | printk(KERN_ERR PREFIX |
607 | "Unable to load the System Description Tables\n"); | |
1da177e4 LT |
608 | goto error0; |
609 | } | |
610 | ||
611 | /* | |
612 | * Get a separate copy of the FADT for use by other drivers. | |
613 | */ | |
b229cf92 | 614 | status = acpi_get_table(ACPI_TABLE_ID_FADT, 1, &buffer); |
1da177e4 LT |
615 | if (ACPI_FAILURE(status)) { |
616 | printk(KERN_ERR PREFIX "Unable to get the FADT\n"); | |
617 | goto error0; | |
618 | } | |
1da177e4 LT |
619 | #ifdef CONFIG_X86 |
620 | if (!acpi_ioapic) { | |
621 | extern acpi_interrupt_flags acpi_sci_flags; | |
622 | ||
623 | /* compatible (0) means level (3) */ | |
624 | if (acpi_sci_flags.trigger == 0) | |
625 | acpi_sci_flags.trigger = 3; | |
626 | ||
627 | /* Set PIC-mode SCI trigger type */ | |
4be44fcd LB |
628 | acpi_pic_sci_set_trigger(acpi_fadt.sci_int, |
629 | acpi_sci_flags.trigger); | |
1da177e4 LT |
630 | } else { |
631 | extern int acpi_sci_override_gsi; | |
632 | /* | |
633 | * now that acpi_fadt is initialized, | |
634 | * update it with result from INT_SRC_OVR parsing | |
635 | */ | |
636 | acpi_fadt.sci_int = acpi_sci_override_gsi; | |
637 | } | |
638 | #endif | |
639 | ||
4be44fcd LB |
640 | status = |
641 | acpi_enable_subsystem(~ | |
642 | (ACPI_NO_HARDWARE_INIT | | |
643 | ACPI_NO_ACPI_ENABLE)); | |
1da177e4 LT |
644 | if (ACPI_FAILURE(status)) { |
645 | printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); | |
646 | goto error0; | |
647 | } | |
648 | ||
d550d98d | 649 | return; |
1da177e4 | 650 | |
4be44fcd | 651 | error0: |
1da177e4 | 652 | disable_acpi(); |
d550d98d | 653 | return; |
1da177e4 LT |
654 | } |
655 | ||
4be44fcd | 656 | static int __init acpi_bus_init(void) |
1da177e4 | 657 | { |
4be44fcd LB |
658 | int result = 0; |
659 | acpi_status status = AE_OK; | |
660 | extern acpi_status acpi_os_initialize1(void); | |
1da177e4 | 661 | |
1da177e4 LT |
662 | |
663 | status = acpi_os_initialize1(); | |
664 | ||
4be44fcd LB |
665 | status = |
666 | acpi_enable_subsystem(ACPI_NO_HARDWARE_INIT | ACPI_NO_ACPI_ENABLE); | |
1da177e4 | 667 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
668 | printk(KERN_ERR PREFIX |
669 | "Unable to start the ACPI Interpreter\n"); | |
1da177e4 LT |
670 | goto error1; |
671 | } | |
672 | ||
673 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
674 | printk(KERN_ERR PREFIX |
675 | "Unable to initialize ACPI OS objects\n"); | |
1da177e4 LT |
676 | goto error1; |
677 | } | |
678 | #ifdef CONFIG_ACPI_EC | |
679 | /* | |
680 | * ACPI 2.0 requires the EC driver to be loaded and work before | |
681 | * the EC device is found in the namespace (i.e. before acpi_initialize_objects() | |
682 | * is called). | |
683 | * | |
684 | * This is accomplished by looking for the ECDT table, and getting | |
685 | * the EC parameters out of that. | |
686 | */ | |
687 | status = acpi_ec_ecdt_probe(); | |
688 | /* Ignore result. Not having an ECDT is not fatal. */ | |
689 | #endif | |
690 | ||
691 | status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); | |
692 | if (ACPI_FAILURE(status)) { | |
693 | printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); | |
694 | goto error1; | |
695 | } | |
696 | ||
697 | printk(KERN_INFO PREFIX "Interpreter enabled\n"); | |
698 | ||
699 | /* | |
700 | * Get the system interrupt model and evaluate \_PIC. | |
701 | */ | |
702 | result = acpi_bus_init_irq(); | |
703 | if (result) | |
704 | goto error1; | |
705 | ||
706 | /* | |
707 | * Register the for all standard device notifications. | |
708 | */ | |
4be44fcd LB |
709 | status = |
710 | acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, | |
711 | &acpi_bus_notify, NULL); | |
1da177e4 | 712 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
713 | printk(KERN_ERR PREFIX |
714 | "Unable to register for device notifications\n"); | |
1da177e4 LT |
715 | goto error1; |
716 | } | |
717 | ||
718 | /* | |
719 | * Create the top ACPI proc directory | |
720 | */ | |
721 | acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); | |
722 | ||
d550d98d | 723 | return 0; |
1da177e4 LT |
724 | |
725 | /* Mimic structured exception handling */ | |
4be44fcd | 726 | error1: |
1da177e4 | 727 | acpi_terminate(); |
d550d98d | 728 | return -ENODEV; |
1da177e4 LT |
729 | } |
730 | ||
4be44fcd | 731 | decl_subsys(acpi, NULL, NULL); |
1da177e4 | 732 | |
4be44fcd | 733 | static int __init acpi_init(void) |
1da177e4 | 734 | { |
4be44fcd | 735 | int result = 0; |
1da177e4 | 736 | |
1da177e4 | 737 | |
1da177e4 LT |
738 | if (acpi_disabled) { |
739 | printk(KERN_INFO PREFIX "Interpreter disabled.\n"); | |
d550d98d | 740 | return -ENODEV; |
1da177e4 LT |
741 | } |
742 | ||
d568df84 RD |
743 | result = firmware_register(&acpi_subsys); |
744 | if (result < 0) | |
745 | printk(KERN_WARNING "%s: firmware_register error: %d\n", | |
746 | __FUNCTION__, result); | |
1da177e4 LT |
747 | |
748 | result = acpi_bus_init(); | |
749 | ||
750 | if (!result) { | |
bca73e4b | 751 | #ifdef CONFIG_PM_LEGACY |
1da177e4 LT |
752 | if (!PM_IS_ACTIVE()) |
753 | pm_active = 1; | |
754 | else { | |
4be44fcd LB |
755 | printk(KERN_INFO PREFIX |
756 | "APM is already active, exiting\n"); | |
1da177e4 LT |
757 | disable_acpi(); |
758 | result = -ENODEV; | |
759 | } | |
760 | #endif | |
761 | } else | |
762 | disable_acpi(); | |
763 | ||
d550d98d | 764 | return result; |
1da177e4 LT |
765 | } |
766 | ||
767 | subsys_initcall(acpi_init); |