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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", |
19c38de8 | 197 | kobject_name(&device->dev.kobj))); |
d550d98d | 198 | return -ENODEV; |
1da177e4 | 199 | } |
b913100d | 200 | /* |
c35923bc | 201 | * Get device's current power state |
b913100d | 202 | */ |
c35923bc | 203 | acpi_bus_get_power(device->handle, &device->power.state); |
93ad7c07 | 204 | if (state == device->power.state) { |
b1028c54 KK |
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); | |
5e32132b SL |
263 | else { |
264 | device->power.state = state; | |
4be44fcd LB |
265 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
266 | "Device [%s] transitioned to D%d\n", | |
267 | device->pnp.bus_id, state)); | |
5e32132b | 268 | } |
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 | ||
14e04fb3 | 279 | #ifdef CONFIG_ACPI_PROC_EVENT |
1da177e4 LT |
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 | |
8db85d4c | 287 | int acpi_bus_generate_proc_event4(const char *device_class, const char *bus_id, u8 type, int data) |
1da177e4 | 288 | { |
8db85d4c | 289 | struct acpi_bus_event *event; |
4be44fcd | 290 | unsigned long flags = 0; |
1da177e4 | 291 | |
1da177e4 LT |
292 | /* drop event on the floor if no one's listening */ |
293 | if (!event_is_open) | |
d550d98d | 294 | return 0; |
1da177e4 LT |
295 | |
296 | event = kmalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC); | |
297 | if (!event) | |
d550d98d | 298 | return -ENOMEM; |
1da177e4 | 299 | |
8db85d4c AS |
300 | strcpy(event->device_class, device_class); |
301 | strcpy(event->bus_id, bus_id); | |
1da177e4 LT |
302 | event->type = type; |
303 | event->data = data; | |
304 | ||
305 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
306 | list_add_tail(&event->node, &acpi_bus_event_list); | |
307 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); | |
308 | ||
309 | wake_up_interruptible(&acpi_bus_event_queue); | |
310 | ||
d550d98d | 311 | return 0; |
8db85d4c AS |
312 | |
313 | } | |
314 | ||
315 | EXPORT_SYMBOL_GPL(acpi_bus_generate_proc_event4); | |
316 | ||
317 | int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data) | |
318 | { | |
319 | if (!device) | |
320 | return -EINVAL; | |
321 | return acpi_bus_generate_proc_event4(device->pnp.device_class, | |
322 | device->pnp.bus_id, type, data); | |
1da177e4 | 323 | } |
4be44fcd | 324 | |
14e04fb3 | 325 | EXPORT_SYMBOL(acpi_bus_generate_proc_event); |
1da177e4 | 326 | |
4be44fcd | 327 | int acpi_bus_receive_event(struct acpi_bus_event *event) |
1da177e4 | 328 | { |
4be44fcd LB |
329 | unsigned long flags = 0; |
330 | struct acpi_bus_event *entry = NULL; | |
1da177e4 LT |
331 | |
332 | DECLARE_WAITQUEUE(wait, current); | |
333 | ||
1da177e4 LT |
334 | |
335 | if (!event) | |
d550d98d | 336 | return -EINVAL; |
1da177e4 LT |
337 | |
338 | if (list_empty(&acpi_bus_event_list)) { | |
339 | ||
340 | set_current_state(TASK_INTERRUPTIBLE); | |
341 | add_wait_queue(&acpi_bus_event_queue, &wait); | |
342 | ||
343 | if (list_empty(&acpi_bus_event_list)) | |
344 | schedule(); | |
345 | ||
346 | remove_wait_queue(&acpi_bus_event_queue, &wait); | |
347 | set_current_state(TASK_RUNNING); | |
348 | ||
349 | if (signal_pending(current)) | |
d550d98d | 350 | return -ERESTARTSYS; |
1da177e4 LT |
351 | } |
352 | ||
353 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
4be44fcd LB |
354 | entry = |
355 | list_entry(acpi_bus_event_list.next, struct acpi_bus_event, node); | |
1da177e4 LT |
356 | if (entry) |
357 | list_del(&entry->node); | |
358 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); | |
359 | ||
360 | if (!entry) | |
d550d98d | 361 | return -ENODEV; |
1da177e4 LT |
362 | |
363 | memcpy(event, entry, sizeof(struct acpi_bus_event)); | |
364 | ||
365 | kfree(entry); | |
366 | ||
d550d98d | 367 | return 0; |
1da177e4 | 368 | } |
1da177e4 | 369 | |
4be44fcd | 370 | EXPORT_SYMBOL(acpi_bus_receive_event); |
14e04fb3 | 371 | #endif /* CONFIG_ACPI_PROC_EVENT */ |
1da177e4 LT |
372 | |
373 | /* -------------------------------------------------------------------------- | |
374 | Notification Handling | |
375 | -------------------------------------------------------------------------- */ | |
376 | ||
377 | static int | |
4be44fcd | 378 | acpi_bus_check_device(struct acpi_device *device, int *status_changed) |
1da177e4 | 379 | { |
4be44fcd | 380 | acpi_status status = 0; |
1da177e4 LT |
381 | struct acpi_device_status old_status; |
382 | ||
1da177e4 LT |
383 | |
384 | if (!device) | |
d550d98d | 385 | return -EINVAL; |
1da177e4 LT |
386 | |
387 | if (status_changed) | |
388 | *status_changed = 0; | |
389 | ||
390 | old_status = device->status; | |
391 | ||
392 | /* | |
393 | * Make sure this device's parent is present before we go about | |
394 | * messing with the device. | |
395 | */ | |
396 | if (device->parent && !device->parent->status.present) { | |
397 | device->status = device->parent->status; | |
398 | if (STRUCT_TO_INT(old_status) != STRUCT_TO_INT(device->status)) { | |
399 | if (status_changed) | |
400 | *status_changed = 1; | |
401 | } | |
d550d98d | 402 | return 0; |
1da177e4 LT |
403 | } |
404 | ||
405 | status = acpi_bus_get_status(device); | |
406 | if (ACPI_FAILURE(status)) | |
d550d98d | 407 | return -ENODEV; |
1da177e4 LT |
408 | |
409 | if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status)) | |
d550d98d | 410 | return 0; |
1da177e4 LT |
411 | |
412 | if (status_changed) | |
413 | *status_changed = 1; | |
4be44fcd | 414 | |
1da177e4 LT |
415 | /* |
416 | * Device Insertion/Removal | |
417 | */ | |
418 | if ((device->status.present) && !(old_status.present)) { | |
419 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n")); | |
420 | /* TBD: Handle device insertion */ | |
4be44fcd | 421 | } else if (!(device->status.present) && (old_status.present)) { |
1da177e4 LT |
422 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n")); |
423 | /* TBD: Handle device removal */ | |
424 | } | |
425 | ||
d550d98d | 426 | return 0; |
1da177e4 LT |
427 | } |
428 | ||
4be44fcd | 429 | static int acpi_bus_check_scope(struct acpi_device *device) |
1da177e4 | 430 | { |
4be44fcd LB |
431 | int result = 0; |
432 | int status_changed = 0; | |
1da177e4 | 433 | |
1da177e4 LT |
434 | |
435 | if (!device) | |
d550d98d | 436 | return -EINVAL; |
1da177e4 LT |
437 | |
438 | /* Status Change? */ | |
439 | result = acpi_bus_check_device(device, &status_changed); | |
440 | if (result) | |
d550d98d | 441 | return result; |
1da177e4 LT |
442 | |
443 | if (!status_changed) | |
d550d98d | 444 | return 0; |
1da177e4 LT |
445 | |
446 | /* | |
447 | * TBD: Enumerate child devices within this device's scope and | |
448 | * run acpi_bus_check_device()'s on them. | |
449 | */ | |
450 | ||
d550d98d | 451 | return 0; |
1da177e4 LT |
452 | } |
453 | ||
1da177e4 LT |
454 | /** |
455 | * acpi_bus_notify | |
456 | * --------------- | |
457 | * Callback for all 'system-level' device notifications (values 0x00-0x7F). | |
458 | */ | |
4be44fcd | 459 | static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) |
1da177e4 | 460 | { |
4be44fcd LB |
461 | int result = 0; |
462 | struct acpi_device *device = NULL; | |
1da177e4 | 463 | |
1da177e4 LT |
464 | |
465 | if (acpi_bus_get_device(handle, &device)) | |
d550d98d | 466 | return; |
1da177e4 LT |
467 | |
468 | switch (type) { | |
469 | ||
470 | case ACPI_NOTIFY_BUS_CHECK: | |
4be44fcd LB |
471 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
472 | "Received BUS CHECK notification for device [%s]\n", | |
473 | device->pnp.bus_id)); | |
1da177e4 | 474 | result = acpi_bus_check_scope(device); |
aafbcd16 | 475 | /* |
1da177e4 | 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_CHECK: | |
4be44fcd LB |
482 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
483 | "Received DEVICE CHECK notification for device [%s]\n", | |
484 | device->pnp.bus_id)); | |
1da177e4 | 485 | result = acpi_bus_check_device(device, NULL); |
aafbcd16 | 486 | /* |
1da177e4 | 487 | * TBD: We'll need to outsource certain events to non-ACPI |
4be44fcd | 488 | * drivers via the device manager (device.c). |
1da177e4 LT |
489 | */ |
490 | break; | |
491 | ||
492 | case ACPI_NOTIFY_DEVICE_WAKE: | |
4be44fcd LB |
493 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
494 | "Received DEVICE WAKE notification for device [%s]\n", | |
495 | device->pnp.bus_id)); | |
1da177e4 LT |
496 | /* TBD */ |
497 | break; | |
498 | ||
499 | case ACPI_NOTIFY_EJECT_REQUEST: | |
4be44fcd LB |
500 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
501 | "Received EJECT REQUEST notification for device [%s]\n", | |
502 | device->pnp.bus_id)); | |
1da177e4 LT |
503 | /* TBD */ |
504 | break; | |
505 | ||
506 | case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: | |
4be44fcd LB |
507 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
508 | "Received DEVICE CHECK LIGHT notification for device [%s]\n", | |
509 | device->pnp.bus_id)); | |
1da177e4 LT |
510 | /* TBD: Exactly what does 'light' mean? */ |
511 | break; | |
512 | ||
513 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
4be44fcd LB |
514 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
515 | "Received FREQUENCY MISMATCH notification for device [%s]\n", | |
516 | device->pnp.bus_id)); | |
1da177e4 LT |
517 | /* TBD */ |
518 | break; | |
519 | ||
520 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
4be44fcd LB |
521 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
522 | "Received BUS MODE MISMATCH notification for device [%s]\n", | |
523 | device->pnp.bus_id)); | |
1da177e4 LT |
524 | /* TBD */ |
525 | break; | |
526 | ||
527 | case ACPI_NOTIFY_POWER_FAULT: | |
4be44fcd LB |
528 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
529 | "Received POWER FAULT notification for device [%s]\n", | |
530 | device->pnp.bus_id)); | |
1da177e4 LT |
531 | /* TBD */ |
532 | break; | |
533 | ||
534 | default: | |
4be44fcd LB |
535 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
536 | "Received unknown/unsupported notification [%08x]\n", | |
537 | type)); | |
1da177e4 LT |
538 | break; |
539 | } | |
540 | ||
d550d98d | 541 | return; |
1da177e4 LT |
542 | } |
543 | ||
544 | /* -------------------------------------------------------------------------- | |
545 | Initialization/Cleanup | |
546 | -------------------------------------------------------------------------- */ | |
547 | ||
4be44fcd | 548 | static int __init acpi_bus_init_irq(void) |
1da177e4 | 549 | { |
4be44fcd LB |
550 | acpi_status status = AE_OK; |
551 | union acpi_object arg = { ACPI_TYPE_INTEGER }; | |
552 | struct acpi_object_list arg_list = { 1, &arg }; | |
553 | char *message = NULL; | |
1da177e4 | 554 | |
1da177e4 | 555 | |
aafbcd16 | 556 | /* |
1da177e4 LT |
557 | * Let the system know what interrupt model we are using by |
558 | * evaluating the \_PIC object, if exists. | |
559 | */ | |
560 | ||
561 | switch (acpi_irq_model) { | |
562 | case ACPI_IRQ_MODEL_PIC: | |
563 | message = "PIC"; | |
564 | break; | |
565 | case ACPI_IRQ_MODEL_IOAPIC: | |
566 | message = "IOAPIC"; | |
567 | break; | |
568 | case ACPI_IRQ_MODEL_IOSAPIC: | |
569 | message = "IOSAPIC"; | |
570 | break; | |
3948ec94 JK |
571 | case ACPI_IRQ_MODEL_PLATFORM: |
572 | message = "platform specific model"; | |
573 | break; | |
1da177e4 LT |
574 | default: |
575 | printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n"); | |
d550d98d | 576 | return -ENODEV; |
1da177e4 LT |
577 | } |
578 | ||
579 | printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message); | |
580 | ||
581 | arg.integer.value = acpi_irq_model; | |
582 | ||
583 | status = acpi_evaluate_object(NULL, "\\_PIC", &arg_list, NULL); | |
584 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { | |
a6fc6720 | 585 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC")); |
d550d98d | 586 | return -ENODEV; |
1da177e4 LT |
587 | } |
588 | ||
d550d98d | 589 | return 0; |
1da177e4 LT |
590 | } |
591 | ||
ad71860a AS |
592 | acpi_native_uint acpi_gbl_permanent_mmap; |
593 | ||
594 | ||
4be44fcd | 595 | void __init acpi_early_init(void) |
1da177e4 | 596 | { |
4be44fcd | 597 | acpi_status status = AE_OK; |
1da177e4 LT |
598 | |
599 | if (acpi_disabled) | |
d550d98d | 600 | return; |
1da177e4 | 601 | |
61686124 BM |
602 | printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION); |
603 | ||
1da177e4 LT |
604 | /* enable workarounds, unless strict ACPI spec. compliance */ |
605 | if (!acpi_strict) | |
606 | acpi_gbl_enable_interpreter_slack = TRUE; | |
607 | ||
ad71860a AS |
608 | acpi_gbl_permanent_mmap = 1; |
609 | ||
610 | status = acpi_reallocate_root_table(); | |
611 | if (ACPI_FAILURE(status)) { | |
612 | printk(KERN_ERR PREFIX | |
613 | "Unable to reallocate ACPI tables\n"); | |
614 | goto error0; | |
615 | } | |
616 | ||
1da177e4 LT |
617 | status = acpi_initialize_subsystem(); |
618 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
619 | printk(KERN_ERR PREFIX |
620 | "Unable to initialize the ACPI Interpreter\n"); | |
1da177e4 LT |
621 | goto error0; |
622 | } | |
623 | ||
624 | status = acpi_load_tables(); | |
625 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
626 | printk(KERN_ERR PREFIX |
627 | "Unable to load the System Description Tables\n"); | |
1da177e4 LT |
628 | goto error0; |
629 | } | |
630 | ||
1da177e4 LT |
631 | #ifdef CONFIG_X86 |
632 | if (!acpi_ioapic) { | |
5f3b1a8b | 633 | extern u8 acpi_sci_flags; |
1da177e4 LT |
634 | |
635 | /* compatible (0) means level (3) */ | |
5f3b1a8b AS |
636 | if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) { |
637 | acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK; | |
638 | acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL; | |
639 | } | |
1da177e4 | 640 | /* Set PIC-mode SCI trigger type */ |
cee324b1 | 641 | acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt, |
5f3b1a8b | 642 | (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2); |
1da177e4 LT |
643 | } else { |
644 | extern int acpi_sci_override_gsi; | |
645 | /* | |
cee324b1 | 646 | * now that acpi_gbl_FADT is initialized, |
1da177e4 LT |
647 | * update it with result from INT_SRC_OVR parsing |
648 | */ | |
cee324b1 | 649 | acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi; |
1da177e4 LT |
650 | } |
651 | #endif | |
652 | ||
4be44fcd LB |
653 | status = |
654 | acpi_enable_subsystem(~ | |
655 | (ACPI_NO_HARDWARE_INIT | | |
656 | ACPI_NO_ACPI_ENABLE)); | |
1da177e4 LT |
657 | if (ACPI_FAILURE(status)) { |
658 | printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); | |
659 | goto error0; | |
660 | } | |
661 | ||
d550d98d | 662 | return; |
1da177e4 | 663 | |
4be44fcd | 664 | error0: |
1da177e4 | 665 | disable_acpi(); |
d550d98d | 666 | return; |
1da177e4 LT |
667 | } |
668 | ||
4be44fcd | 669 | static int __init acpi_bus_init(void) |
1da177e4 | 670 | { |
4be44fcd LB |
671 | int result = 0; |
672 | acpi_status status = AE_OK; | |
673 | extern acpi_status acpi_os_initialize1(void); | |
1da177e4 | 674 | |
1da177e4 LT |
675 | |
676 | status = acpi_os_initialize1(); | |
677 | ||
4be44fcd LB |
678 | status = |
679 | acpi_enable_subsystem(ACPI_NO_HARDWARE_INIT | ACPI_NO_ACPI_ENABLE); | |
1da177e4 | 680 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
681 | printk(KERN_ERR PREFIX |
682 | "Unable to start the ACPI Interpreter\n"); | |
1da177e4 LT |
683 | goto error1; |
684 | } | |
685 | ||
686 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
687 | printk(KERN_ERR PREFIX |
688 | "Unable to initialize ACPI OS objects\n"); | |
1da177e4 LT |
689 | goto error1; |
690 | } | |
691 | #ifdef CONFIG_ACPI_EC | |
692 | /* | |
693 | * ACPI 2.0 requires the EC driver to be loaded and work before | |
694 | * the EC device is found in the namespace (i.e. before acpi_initialize_objects() | |
695 | * is called). | |
696 | * | |
aafbcd16 | 697 | * This is accomplished by looking for the ECDT table, and getting |
1da177e4 LT |
698 | * the EC parameters out of that. |
699 | */ | |
700 | status = acpi_ec_ecdt_probe(); | |
701 | /* Ignore result. Not having an ECDT is not fatal. */ | |
702 | #endif | |
703 | ||
704 | status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); | |
705 | if (ACPI_FAILURE(status)) { | |
706 | printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); | |
707 | goto error1; | |
708 | } | |
709 | ||
710 | printk(KERN_INFO PREFIX "Interpreter enabled\n"); | |
711 | ||
aafbcd16 AS |
712 | /* Initialize sleep structures */ |
713 | acpi_sleep_init(); | |
714 | ||
1da177e4 LT |
715 | /* |
716 | * Get the system interrupt model and evaluate \_PIC. | |
717 | */ | |
718 | result = acpi_bus_init_irq(); | |
719 | if (result) | |
720 | goto error1; | |
721 | ||
722 | /* | |
723 | * Register the for all standard device notifications. | |
724 | */ | |
4be44fcd LB |
725 | status = |
726 | acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, | |
727 | &acpi_bus_notify, NULL); | |
1da177e4 | 728 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
729 | printk(KERN_ERR PREFIX |
730 | "Unable to register for device notifications\n"); | |
1da177e4 LT |
731 | goto error1; |
732 | } | |
733 | ||
734 | /* | |
735 | * Create the top ACPI proc directory | |
736 | */ | |
737 | acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); | |
738 | ||
d550d98d | 739 | return 0; |
1da177e4 LT |
740 | |
741 | /* Mimic structured exception handling */ | |
4be44fcd | 742 | error1: |
1da177e4 | 743 | acpi_terminate(); |
d550d98d | 744 | return -ENODEV; |
1da177e4 LT |
745 | } |
746 | ||
4be44fcd | 747 | decl_subsys(acpi, NULL, NULL); |
1da177e4 | 748 | |
4be44fcd | 749 | static int __init acpi_init(void) |
1da177e4 | 750 | { |
4be44fcd | 751 | int result = 0; |
1da177e4 | 752 | |
1da177e4 | 753 | |
1da177e4 LT |
754 | if (acpi_disabled) { |
755 | printk(KERN_INFO PREFIX "Interpreter disabled.\n"); | |
d550d98d | 756 | return -ENODEV; |
1da177e4 LT |
757 | } |
758 | ||
d568df84 RD |
759 | result = firmware_register(&acpi_subsys); |
760 | if (result < 0) | |
761 | printk(KERN_WARNING "%s: firmware_register error: %d\n", | |
762 | __FUNCTION__, result); | |
1da177e4 LT |
763 | |
764 | result = acpi_bus_init(); | |
765 | ||
766 | if (!result) { | |
bca73e4b | 767 | #ifdef CONFIG_PM_LEGACY |
1da177e4 LT |
768 | if (!PM_IS_ACTIVE()) |
769 | pm_active = 1; | |
770 | else { | |
4be44fcd LB |
771 | printk(KERN_INFO PREFIX |
772 | "APM is already active, exiting\n"); | |
1da177e4 LT |
773 | disable_acpi(); |
774 | result = -ENODEV; | |
775 | } | |
776 | #endif | |
777 | } else | |
778 | disable_acpi(); | |
779 | ||
d550d98d | 780 | return result; |
1da177e4 LT |
781 | } |
782 | ||
783 | subsys_initcall(acpi_init); |