Commit | Line | Data |
---|---|---|
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 | */ | |
b1028c54 KK |
202 | if ((device->power.state == ACPI_STATE_UNKNOWN) || device->flags.force_power_state) |
203 | acpi_bus_get_power(device->handle, &device->power.state); | |
204 | if ((state == device->power.state) && !device->flags.force_power_state) { | |
205 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n", | |
206 | state)); | |
207 | return 0; | |
1da177e4 | 208 | } |
b1028c54 | 209 | |
1da177e4 | 210 | if (!device->power.states[state].flags.valid) { |
cece9296 | 211 | printk(KERN_WARNING PREFIX "Device does not support D%d\n", state); |
d550d98d | 212 | return -ENODEV; |
1da177e4 LT |
213 | } |
214 | if (device->parent && (state < device->parent->power.state)) { | |
cece9296 | 215 | printk(KERN_WARNING PREFIX |
a6fc6720 | 216 | "Cannot set device to a higher-powered" |
cece9296 | 217 | " state than parent\n"); |
d550d98d | 218 | return -ENODEV; |
1da177e4 LT |
219 | } |
220 | ||
221 | /* | |
222 | * Transition Power | |
223 | * ---------------- | |
224 | * On transitions to a high-powered state we first apply power (via | |
225 | * power resources) then evalute _PSx. Conversly for transitions to | |
226 | * a lower-powered state. | |
b913100d | 227 | */ |
1da177e4 LT |
228 | if (state < device->power.state) { |
229 | if (device->power.flags.power_resources) { | |
230 | result = acpi_power_transition(device, state); | |
231 | if (result) | |
232 | goto end; | |
233 | } | |
234 | if (device->power.states[state].flags.explicit_set) { | |
4be44fcd LB |
235 | status = acpi_evaluate_object(device->handle, |
236 | object_name, NULL, NULL); | |
1da177e4 LT |
237 | if (ACPI_FAILURE(status)) { |
238 | result = -ENODEV; | |
239 | goto end; | |
240 | } | |
241 | } | |
4be44fcd | 242 | } else { |
1da177e4 | 243 | if (device->power.states[state].flags.explicit_set) { |
4be44fcd LB |
244 | status = acpi_evaluate_object(device->handle, |
245 | object_name, NULL, NULL); | |
1da177e4 LT |
246 | if (ACPI_FAILURE(status)) { |
247 | result = -ENODEV; | |
248 | goto end; | |
249 | } | |
250 | } | |
251 | if (device->power.flags.power_resources) { | |
252 | result = acpi_power_transition(device, state); | |
253 | if (result) | |
254 | goto end; | |
255 | } | |
256 | } | |
257 | ||
4be44fcd | 258 | end: |
1da177e4 | 259 | if (result) |
cece9296 LB |
260 | printk(KERN_WARNING PREFIX |
261 | "Transitioning device [%s] to D%d\n", | |
262 | device->pnp.bus_id, state); | |
1da177e4 | 263 | else |
4be44fcd LB |
264 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
265 | "Device [%s] transitioned to D%d\n", | |
266 | device->pnp.bus_id, state)); | |
1da177e4 | 267 | |
d550d98d | 268 | return result; |
1da177e4 | 269 | } |
1da177e4 | 270 | |
4be44fcd | 271 | EXPORT_SYMBOL(acpi_bus_set_power); |
1da177e4 LT |
272 | |
273 | /* -------------------------------------------------------------------------- | |
274 | Event Management | |
275 | -------------------------------------------------------------------------- */ | |
276 | ||
277 | static DEFINE_SPINLOCK(acpi_bus_event_lock); | |
278 | ||
279 | LIST_HEAD(acpi_bus_event_list); | |
280 | DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue); | |
281 | ||
4be44fcd | 282 | extern int event_is_open; |
1da177e4 | 283 | |
4be44fcd | 284 | int acpi_bus_generate_event(struct acpi_device *device, u8 type, int data) |
1da177e4 | 285 | { |
4be44fcd LB |
286 | struct acpi_bus_event *event = NULL; |
287 | unsigned long flags = 0; | |
1da177e4 | 288 | |
1da177e4 LT |
289 | |
290 | if (!device) | |
d550d98d | 291 | return -EINVAL; |
1da177e4 LT |
292 | |
293 | /* drop event on the floor if no one's listening */ | |
294 | if (!event_is_open) | |
d550d98d | 295 | return 0; |
1da177e4 LT |
296 | |
297 | event = kmalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC); | |
298 | if (!event) | |
d550d98d | 299 | return -ENOMEM; |
1da177e4 LT |
300 | |
301 | strcpy(event->device_class, device->pnp.device_class); | |
302 | strcpy(event->bus_id, device->pnp.bus_id); | |
303 | event->type = type; | |
304 | event->data = data; | |
305 | ||
306 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
307 | list_add_tail(&event->node, &acpi_bus_event_list); | |
308 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); | |
309 | ||
310 | wake_up_interruptible(&acpi_bus_event_queue); | |
311 | ||
d550d98d | 312 | return 0; |
1da177e4 | 313 | } |
4be44fcd | 314 | |
1da177e4 LT |
315 | EXPORT_SYMBOL(acpi_bus_generate_event); |
316 | ||
4be44fcd | 317 | int acpi_bus_receive_event(struct acpi_bus_event *event) |
1da177e4 | 318 | { |
4be44fcd LB |
319 | unsigned long flags = 0; |
320 | struct acpi_bus_event *entry = NULL; | |
1da177e4 LT |
321 | |
322 | DECLARE_WAITQUEUE(wait, current); | |
323 | ||
1da177e4 LT |
324 | |
325 | if (!event) | |
d550d98d | 326 | return -EINVAL; |
1da177e4 LT |
327 | |
328 | if (list_empty(&acpi_bus_event_list)) { | |
329 | ||
330 | set_current_state(TASK_INTERRUPTIBLE); | |
331 | add_wait_queue(&acpi_bus_event_queue, &wait); | |
332 | ||
333 | if (list_empty(&acpi_bus_event_list)) | |
334 | schedule(); | |
335 | ||
336 | remove_wait_queue(&acpi_bus_event_queue, &wait); | |
337 | set_current_state(TASK_RUNNING); | |
338 | ||
339 | if (signal_pending(current)) | |
d550d98d | 340 | return -ERESTARTSYS; |
1da177e4 LT |
341 | } |
342 | ||
343 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
4be44fcd LB |
344 | entry = |
345 | list_entry(acpi_bus_event_list.next, struct acpi_bus_event, node); | |
1da177e4 LT |
346 | if (entry) |
347 | list_del(&entry->node); | |
348 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); | |
349 | ||
350 | if (!entry) | |
d550d98d | 351 | return -ENODEV; |
1da177e4 LT |
352 | |
353 | memcpy(event, entry, sizeof(struct acpi_bus_event)); | |
354 | ||
355 | kfree(entry); | |
356 | ||
d550d98d | 357 | return 0; |
1da177e4 | 358 | } |
1da177e4 | 359 | |
4be44fcd | 360 | EXPORT_SYMBOL(acpi_bus_receive_event); |
1da177e4 LT |
361 | |
362 | /* -------------------------------------------------------------------------- | |
363 | Notification Handling | |
364 | -------------------------------------------------------------------------- */ | |
365 | ||
366 | static int | |
4be44fcd | 367 | acpi_bus_check_device(struct acpi_device *device, int *status_changed) |
1da177e4 | 368 | { |
4be44fcd | 369 | acpi_status status = 0; |
1da177e4 LT |
370 | struct acpi_device_status old_status; |
371 | ||
1da177e4 LT |
372 | |
373 | if (!device) | |
d550d98d | 374 | return -EINVAL; |
1da177e4 LT |
375 | |
376 | if (status_changed) | |
377 | *status_changed = 0; | |
378 | ||
379 | old_status = device->status; | |
380 | ||
381 | /* | |
382 | * Make sure this device's parent is present before we go about | |
383 | * messing with the device. | |
384 | */ | |
385 | if (device->parent && !device->parent->status.present) { | |
386 | device->status = device->parent->status; | |
387 | if (STRUCT_TO_INT(old_status) != STRUCT_TO_INT(device->status)) { | |
388 | if (status_changed) | |
389 | *status_changed = 1; | |
390 | } | |
d550d98d | 391 | return 0; |
1da177e4 LT |
392 | } |
393 | ||
394 | status = acpi_bus_get_status(device); | |
395 | if (ACPI_FAILURE(status)) | |
d550d98d | 396 | return -ENODEV; |
1da177e4 LT |
397 | |
398 | if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status)) | |
d550d98d | 399 | return 0; |
1da177e4 LT |
400 | |
401 | if (status_changed) | |
402 | *status_changed = 1; | |
4be44fcd | 403 | |
1da177e4 LT |
404 | /* |
405 | * Device Insertion/Removal | |
406 | */ | |
407 | if ((device->status.present) && !(old_status.present)) { | |
408 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n")); | |
409 | /* TBD: Handle device insertion */ | |
4be44fcd | 410 | } else if (!(device->status.present) && (old_status.present)) { |
1da177e4 LT |
411 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n")); |
412 | /* TBD: Handle device removal */ | |
413 | } | |
414 | ||
d550d98d | 415 | return 0; |
1da177e4 LT |
416 | } |
417 | ||
4be44fcd | 418 | static int acpi_bus_check_scope(struct acpi_device *device) |
1da177e4 | 419 | { |
4be44fcd LB |
420 | int result = 0; |
421 | int status_changed = 0; | |
1da177e4 | 422 | |
1da177e4 LT |
423 | |
424 | if (!device) | |
d550d98d | 425 | return -EINVAL; |
1da177e4 LT |
426 | |
427 | /* Status Change? */ | |
428 | result = acpi_bus_check_device(device, &status_changed); | |
429 | if (result) | |
d550d98d | 430 | return result; |
1da177e4 LT |
431 | |
432 | if (!status_changed) | |
d550d98d | 433 | return 0; |
1da177e4 LT |
434 | |
435 | /* | |
436 | * TBD: Enumerate child devices within this device's scope and | |
437 | * run acpi_bus_check_device()'s on them. | |
438 | */ | |
439 | ||
d550d98d | 440 | return 0; |
1da177e4 LT |
441 | } |
442 | ||
1da177e4 LT |
443 | /** |
444 | * acpi_bus_notify | |
445 | * --------------- | |
446 | * Callback for all 'system-level' device notifications (values 0x00-0x7F). | |
447 | */ | |
4be44fcd | 448 | static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) |
1da177e4 | 449 | { |
4be44fcd LB |
450 | int result = 0; |
451 | struct acpi_device *device = NULL; | |
1da177e4 | 452 | |
1da177e4 LT |
453 | |
454 | if (acpi_bus_get_device(handle, &device)) | |
d550d98d | 455 | return; |
1da177e4 LT |
456 | |
457 | switch (type) { | |
458 | ||
459 | case ACPI_NOTIFY_BUS_CHECK: | |
4be44fcd LB |
460 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
461 | "Received BUS CHECK notification for device [%s]\n", | |
462 | device->pnp.bus_id)); | |
1da177e4 LT |
463 | result = acpi_bus_check_scope(device); |
464 | /* | |
465 | * TBD: We'll need to outsource certain events to non-ACPI | |
4be44fcd | 466 | * drivers via the device manager (device.c). |
1da177e4 LT |
467 | */ |
468 | break; | |
469 | ||
470 | case ACPI_NOTIFY_DEVICE_CHECK: | |
4be44fcd LB |
471 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
472 | "Received DEVICE CHECK notification for device [%s]\n", | |
473 | device->pnp.bus_id)); | |
1da177e4 LT |
474 | result = acpi_bus_check_device(device, NULL); |
475 | /* | |
476 | * TBD: We'll need to outsource certain events to non-ACPI | |
4be44fcd | 477 | * drivers via the device manager (device.c). |
1da177e4 LT |
478 | */ |
479 | break; | |
480 | ||
481 | case ACPI_NOTIFY_DEVICE_WAKE: | |
4be44fcd LB |
482 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
483 | "Received DEVICE WAKE notification for device [%s]\n", | |
484 | device->pnp.bus_id)); | |
1da177e4 LT |
485 | /* TBD */ |
486 | break; | |
487 | ||
488 | case ACPI_NOTIFY_EJECT_REQUEST: | |
4be44fcd LB |
489 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
490 | "Received EJECT REQUEST notification for device [%s]\n", | |
491 | device->pnp.bus_id)); | |
1da177e4 LT |
492 | /* TBD */ |
493 | break; | |
494 | ||
495 | case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: | |
4be44fcd LB |
496 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
497 | "Received DEVICE CHECK LIGHT notification for device [%s]\n", | |
498 | device->pnp.bus_id)); | |
1da177e4 LT |
499 | /* TBD: Exactly what does 'light' mean? */ |
500 | break; | |
501 | ||
502 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
4be44fcd LB |
503 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
504 | "Received FREQUENCY MISMATCH notification for device [%s]\n", | |
505 | device->pnp.bus_id)); | |
1da177e4 LT |
506 | /* TBD */ |
507 | break; | |
508 | ||
509 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
4be44fcd LB |
510 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
511 | "Received BUS MODE MISMATCH notification for device [%s]\n", | |
512 | device->pnp.bus_id)); | |
1da177e4 LT |
513 | /* TBD */ |
514 | break; | |
515 | ||
516 | case ACPI_NOTIFY_POWER_FAULT: | |
4be44fcd LB |
517 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
518 | "Received POWER FAULT notification for device [%s]\n", | |
519 | device->pnp.bus_id)); | |
1da177e4 LT |
520 | /* TBD */ |
521 | break; | |
522 | ||
523 | default: | |
4be44fcd LB |
524 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
525 | "Received unknown/unsupported notification [%08x]\n", | |
526 | type)); | |
1da177e4 LT |
527 | break; |
528 | } | |
529 | ||
d550d98d | 530 | return; |
1da177e4 LT |
531 | } |
532 | ||
533 | /* -------------------------------------------------------------------------- | |
534 | Initialization/Cleanup | |
535 | -------------------------------------------------------------------------- */ | |
536 | ||
4be44fcd | 537 | static int __init acpi_bus_init_irq(void) |
1da177e4 | 538 | { |
4be44fcd LB |
539 | acpi_status status = AE_OK; |
540 | union acpi_object arg = { ACPI_TYPE_INTEGER }; | |
541 | struct acpi_object_list arg_list = { 1, &arg }; | |
542 | char *message = NULL; | |
1da177e4 | 543 | |
1da177e4 LT |
544 | |
545 | /* | |
546 | * Let the system know what interrupt model we are using by | |
547 | * evaluating the \_PIC object, if exists. | |
548 | */ | |
549 | ||
550 | switch (acpi_irq_model) { | |
551 | case ACPI_IRQ_MODEL_PIC: | |
552 | message = "PIC"; | |
553 | break; | |
554 | case ACPI_IRQ_MODEL_IOAPIC: | |
555 | message = "IOAPIC"; | |
556 | break; | |
557 | case ACPI_IRQ_MODEL_IOSAPIC: | |
558 | message = "IOSAPIC"; | |
559 | break; | |
3948ec94 JK |
560 | case ACPI_IRQ_MODEL_PLATFORM: |
561 | message = "platform specific model"; | |
562 | break; | |
1da177e4 LT |
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 | ||
ad71860a AS |
581 | acpi_native_uint acpi_gbl_permanent_mmap; |
582 | ||
583 | ||
4be44fcd | 584 | void __init acpi_early_init(void) |
1da177e4 | 585 | { |
4be44fcd | 586 | acpi_status status = AE_OK; |
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 | ||
ad71860a AS |
597 | acpi_gbl_permanent_mmap = 1; |
598 | ||
599 | status = acpi_reallocate_root_table(); | |
600 | if (ACPI_FAILURE(status)) { | |
601 | printk(KERN_ERR PREFIX | |
602 | "Unable to reallocate ACPI tables\n"); | |
603 | goto error0; | |
604 | } | |
605 | ||
1da177e4 LT |
606 | status = acpi_initialize_subsystem(); |
607 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
608 | printk(KERN_ERR PREFIX |
609 | "Unable to initialize the ACPI Interpreter\n"); | |
1da177e4 LT |
610 | goto error0; |
611 | } | |
612 | ||
613 | status = acpi_load_tables(); | |
614 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
615 | printk(KERN_ERR PREFIX |
616 | "Unable to load the System Description Tables\n"); | |
1da177e4 LT |
617 | goto error0; |
618 | } | |
619 | ||
1da177e4 LT |
620 | #ifdef CONFIG_X86 |
621 | if (!acpi_ioapic) { | |
5f3b1a8b | 622 | extern u8 acpi_sci_flags; |
1da177e4 LT |
623 | |
624 | /* compatible (0) means level (3) */ | |
5f3b1a8b AS |
625 | if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) { |
626 | acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK; | |
627 | acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL; | |
628 | } | |
1da177e4 | 629 | /* Set PIC-mode SCI trigger type */ |
cee324b1 | 630 | acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt, |
5f3b1a8b | 631 | (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2); |
1da177e4 LT |
632 | } else { |
633 | extern int acpi_sci_override_gsi; | |
634 | /* | |
cee324b1 | 635 | * now that acpi_gbl_FADT is initialized, |
1da177e4 LT |
636 | * update it with result from INT_SRC_OVR parsing |
637 | */ | |
cee324b1 | 638 | acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi; |
1da177e4 LT |
639 | } |
640 | #endif | |
641 | ||
4be44fcd LB |
642 | status = |
643 | acpi_enable_subsystem(~ | |
644 | (ACPI_NO_HARDWARE_INIT | | |
645 | ACPI_NO_ACPI_ENABLE)); | |
1da177e4 LT |
646 | if (ACPI_FAILURE(status)) { |
647 | printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); | |
648 | goto error0; | |
649 | } | |
650 | ||
d550d98d | 651 | return; |
1da177e4 | 652 | |
4be44fcd | 653 | error0: |
1da177e4 | 654 | disable_acpi(); |
d550d98d | 655 | return; |
1da177e4 LT |
656 | } |
657 | ||
4be44fcd | 658 | static int __init acpi_bus_init(void) |
1da177e4 | 659 | { |
4be44fcd LB |
660 | int result = 0; |
661 | acpi_status status = AE_OK; | |
662 | extern acpi_status acpi_os_initialize1(void); | |
1da177e4 | 663 | |
1da177e4 LT |
664 | |
665 | status = acpi_os_initialize1(); | |
666 | ||
4be44fcd LB |
667 | status = |
668 | acpi_enable_subsystem(ACPI_NO_HARDWARE_INIT | ACPI_NO_ACPI_ENABLE); | |
1da177e4 | 669 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
670 | printk(KERN_ERR PREFIX |
671 | "Unable to start the ACPI Interpreter\n"); | |
1da177e4 LT |
672 | goto error1; |
673 | } | |
674 | ||
675 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
676 | printk(KERN_ERR PREFIX |
677 | "Unable to initialize ACPI OS objects\n"); | |
1da177e4 LT |
678 | goto error1; |
679 | } | |
680 | #ifdef CONFIG_ACPI_EC | |
681 | /* | |
682 | * ACPI 2.0 requires the EC driver to be loaded and work before | |
683 | * the EC device is found in the namespace (i.e. before acpi_initialize_objects() | |
684 | * is called). | |
685 | * | |
686 | * This is accomplished by looking for the ECDT table, and getting | |
687 | * the EC parameters out of that. | |
688 | */ | |
689 | status = acpi_ec_ecdt_probe(); | |
690 | /* Ignore result. Not having an ECDT is not fatal. */ | |
691 | #endif | |
692 | ||
693 | status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); | |
694 | if (ACPI_FAILURE(status)) { | |
695 | printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); | |
696 | goto error1; | |
697 | } | |
698 | ||
699 | printk(KERN_INFO PREFIX "Interpreter enabled\n"); | |
700 | ||
701 | /* | |
702 | * Get the system interrupt model and evaluate \_PIC. | |
703 | */ | |
704 | result = acpi_bus_init_irq(); | |
705 | if (result) | |
706 | goto error1; | |
707 | ||
708 | /* | |
709 | * Register the for all standard device notifications. | |
710 | */ | |
4be44fcd LB |
711 | status = |
712 | acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, | |
713 | &acpi_bus_notify, NULL); | |
1da177e4 | 714 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
715 | printk(KERN_ERR PREFIX |
716 | "Unable to register for device notifications\n"); | |
1da177e4 LT |
717 | goto error1; |
718 | } | |
719 | ||
720 | /* | |
721 | * Create the top ACPI proc directory | |
722 | */ | |
723 | acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); | |
724 | ||
d550d98d | 725 | return 0; |
1da177e4 LT |
726 | |
727 | /* Mimic structured exception handling */ | |
4be44fcd | 728 | error1: |
1da177e4 | 729 | acpi_terminate(); |
d550d98d | 730 | return -ENODEV; |
1da177e4 LT |
731 | } |
732 | ||
4be44fcd | 733 | decl_subsys(acpi, NULL, NULL); |
1da177e4 | 734 | |
4be44fcd | 735 | static int __init acpi_init(void) |
1da177e4 | 736 | { |
4be44fcd | 737 | int result = 0; |
1da177e4 | 738 | |
1da177e4 | 739 | |
1da177e4 LT |
740 | if (acpi_disabled) { |
741 | printk(KERN_INFO PREFIX "Interpreter disabled.\n"); | |
d550d98d | 742 | return -ENODEV; |
1da177e4 LT |
743 | } |
744 | ||
d568df84 RD |
745 | result = firmware_register(&acpi_subsys); |
746 | if (result < 0) | |
747 | printk(KERN_WARNING "%s: firmware_register error: %d\n", | |
748 | __FUNCTION__, result); | |
1da177e4 LT |
749 | |
750 | result = acpi_bus_init(); | |
751 | ||
752 | if (!result) { | |
bca73e4b | 753 | #ifdef CONFIG_PM_LEGACY |
1da177e4 LT |
754 | if (!PM_IS_ACTIVE()) |
755 | pm_active = 1; | |
756 | else { | |
4be44fcd LB |
757 | printk(KERN_INFO PREFIX |
758 | "APM is already active, exiting\n"); | |
1da177e4 LT |
759 | disable_acpi(); |
760 | result = -ENODEV; | |
761 | } | |
762 | #endif | |
763 | } else | |
764 | disable_acpi(); | |
765 | ||
d550d98d | 766 | return result; |
1da177e4 LT |
767 | } |
768 | ||
769 | subsys_initcall(acpi_init); |