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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> | |
32 | #include <linux/device.h> | |
33 | #include <linux/proc_fs.h> | |
34 | #ifdef CONFIG_X86 | |
35 | #include <asm/mpspec.h> | |
36 | #endif | |
37 | #include <acpi/acpi_bus.h> | |
38 | #include <acpi/acpi_drivers.h> | |
39 | ||
1da177e4 | 40 | #define _COMPONENT ACPI_BUS_COMPONENT |
f52fd66d | 41 | ACPI_MODULE_NAME("bus"); |
1da177e4 LT |
42 | #ifdef CONFIG_X86 |
43 | extern void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger); | |
44 | #endif | |
45 | ||
4be44fcd LB |
46 | struct acpi_device *acpi_root; |
47 | struct proc_dir_entry *acpi_root_dir; | |
1da177e4 LT |
48 | EXPORT_SYMBOL(acpi_root_dir); |
49 | ||
50 | #define STRUCT_TO_INT(s) (*((int*)&s)) | |
51 | ||
52 | /* -------------------------------------------------------------------------- | |
53 | Device Management | |
54 | -------------------------------------------------------------------------- */ | |
55 | ||
4be44fcd | 56 | int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device) |
1da177e4 | 57 | { |
4be44fcd | 58 | acpi_status status = AE_OK; |
1da177e4 | 59 | |
1da177e4 LT |
60 | |
61 | if (!device) | |
d550d98d | 62 | return -EINVAL; |
1da177e4 LT |
63 | |
64 | /* TBD: Support fixed-feature devices */ | |
65 | ||
4be44fcd | 66 | status = acpi_get_data(handle, acpi_bus_data_handler, (void **)device); |
1da177e4 | 67 | if (ACPI_FAILURE(status) || !*device) { |
9805cb76 LB |
68 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", |
69 | handle)); | |
d550d98d | 70 | return -ENODEV; |
1da177e4 LT |
71 | } |
72 | ||
d550d98d | 73 | return 0; |
1da177e4 | 74 | } |
4be44fcd | 75 | |
1da177e4 LT |
76 | EXPORT_SYMBOL(acpi_bus_get_device); |
77 | ||
4be44fcd | 78 | int acpi_bus_get_status(struct acpi_device *device) |
1da177e4 | 79 | { |
4be44fcd LB |
80 | acpi_status status = AE_OK; |
81 | unsigned long sta = 0; | |
82 | ||
1da177e4 LT |
83 | |
84 | if (!device) | |
d550d98d | 85 | return -EINVAL; |
1da177e4 LT |
86 | |
87 | /* | |
88 | * Evaluate _STA if present. | |
89 | */ | |
90 | if (device->flags.dynamic_status) { | |
4be44fcd LB |
91 | status = |
92 | acpi_evaluate_integer(device->handle, "_STA", NULL, &sta); | |
1da177e4 | 93 | if (ACPI_FAILURE(status)) |
d550d98d | 94 | return -ENODEV; |
4be44fcd | 95 | STRUCT_TO_INT(device->status) = (int)sta; |
1da177e4 LT |
96 | } |
97 | ||
98 | /* | |
99 | * Otherwise we assume the status of our parent (unless we don't | |
100 | * have one, in which case status is implied). | |
101 | */ | |
102 | else if (device->parent) | |
103 | device->status = device->parent->status; | |
104 | else | |
0c0e8921 BH |
105 | STRUCT_TO_INT(device->status) = |
106 | ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | | |
107 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; | |
1da177e4 LT |
108 | |
109 | if (device->status.functional && !device->status.present) { | |
110 | printk(KERN_WARNING PREFIX "Device [%s] status [%08x]: " | |
4be44fcd LB |
111 | "functional but not present; setting present\n", |
112 | device->pnp.bus_id, (u32) STRUCT_TO_INT(device->status)); | |
1da177e4 LT |
113 | device->status.present = 1; |
114 | } | |
115 | ||
4be44fcd LB |
116 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n", |
117 | device->pnp.bus_id, | |
118 | (u32) STRUCT_TO_INT(device->status))); | |
1da177e4 | 119 | |
d550d98d | 120 | return 0; |
1da177e4 | 121 | } |
1da177e4 | 122 | |
4be44fcd | 123 | EXPORT_SYMBOL(acpi_bus_get_status); |
1da177e4 LT |
124 | |
125 | /* -------------------------------------------------------------------------- | |
126 | Power Management | |
127 | -------------------------------------------------------------------------- */ | |
128 | ||
4be44fcd | 129 | int acpi_bus_get_power(acpi_handle handle, int *state) |
1da177e4 | 130 | { |
4be44fcd LB |
131 | int result = 0; |
132 | acpi_status status = 0; | |
133 | struct acpi_device *device = NULL; | |
134 | unsigned long psc = 0; | |
1da177e4 | 135 | |
1da177e4 LT |
136 | |
137 | result = acpi_bus_get_device(handle, &device); | |
138 | if (result) | |
d550d98d | 139 | return result; |
1da177e4 LT |
140 | |
141 | *state = ACPI_STATE_UNKNOWN; | |
142 | ||
143 | if (!device->flags.power_manageable) { | |
144 | /* TBD: Non-recursive algorithm for walking up hierarchy */ | |
145 | if (device->parent) | |
146 | *state = device->parent->power.state; | |
147 | else | |
148 | *state = ACPI_STATE_D0; | |
4be44fcd | 149 | } else { |
1da177e4 | 150 | /* |
aafbcd16 | 151 | * Get the device's power state either directly (via _PSC) or |
1da177e4 LT |
152 | * indirectly (via power resources). |
153 | */ | |
154 | if (device->power.flags.explicit_get) { | |
4be44fcd LB |
155 | status = acpi_evaluate_integer(device->handle, "_PSC", |
156 | NULL, &psc); | |
1da177e4 | 157 | if (ACPI_FAILURE(status)) |
d550d98d | 158 | return -ENODEV; |
4be44fcd LB |
159 | device->power.state = (int)psc; |
160 | } else if (device->power.flags.power_resources) { | |
1da177e4 LT |
161 | result = acpi_power_get_inferred_state(device); |
162 | if (result) | |
d550d98d | 163 | return result; |
1da177e4 LT |
164 | } |
165 | ||
166 | *state = device->power.state; | |
167 | } | |
168 | ||
169 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] power state is D%d\n", | |
4be44fcd | 170 | device->pnp.bus_id, device->power.state)); |
1da177e4 | 171 | |
d550d98d | 172 | return 0; |
1da177e4 | 173 | } |
1da177e4 | 174 | |
4be44fcd | 175 | EXPORT_SYMBOL(acpi_bus_get_power); |
1da177e4 | 176 | |
4be44fcd | 177 | int acpi_bus_set_power(acpi_handle handle, int state) |
1da177e4 | 178 | { |
4be44fcd LB |
179 | int result = 0; |
180 | acpi_status status = AE_OK; | |
181 | struct acpi_device *device = NULL; | |
182 | char object_name[5] = { '_', 'P', 'S', '0' + state, '\0' }; | |
1da177e4 | 183 | |
1da177e4 LT |
184 | |
185 | result = acpi_bus_get_device(handle, &device); | |
186 | if (result) | |
d550d98d | 187 | return result; |
1da177e4 LT |
188 | |
189 | if ((state < ACPI_STATE_D0) || (state > ACPI_STATE_D3)) | |
d550d98d | 190 | return -EINVAL; |
1da177e4 LT |
191 | |
192 | /* Make sure this is a valid target state */ | |
193 | ||
194 | if (!device->flags.power_manageable) { | |
9805cb76 | 195 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device `[%s]' is not power manageable\n", |
19c38de8 | 196 | kobject_name(&device->dev.kobj))); |
d550d98d | 197 | return -ENODEV; |
1da177e4 | 198 | } |
b913100d | 199 | /* |
c35923bc | 200 | * Get device's current power state |
b913100d | 201 | */ |
c35923bc | 202 | acpi_bus_get_power(device->handle, &device->power.state); |
ec68373c | 203 | if ((state == device->power.state) && !device->flags.force_power_state) { |
b1028c54 KK |
204 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n", |
205 | state)); | |
206 | return 0; | |
1da177e4 | 207 | } |
b1028c54 | 208 | |
1da177e4 | 209 | if (!device->power.states[state].flags.valid) { |
cece9296 | 210 | printk(KERN_WARNING PREFIX "Device does not support D%d\n", state); |
d550d98d | 211 | return -ENODEV; |
1da177e4 LT |
212 | } |
213 | if (device->parent && (state < device->parent->power.state)) { | |
cece9296 | 214 | printk(KERN_WARNING PREFIX |
a6fc6720 | 215 | "Cannot set device to a higher-powered" |
cece9296 | 216 | " state than parent\n"); |
d550d98d | 217 | return -ENODEV; |
1da177e4 LT |
218 | } |
219 | ||
220 | /* | |
221 | * Transition Power | |
222 | * ---------------- | |
223 | * On transitions to a high-powered state we first apply power (via | |
224 | * power resources) then evalute _PSx. Conversly for transitions to | |
225 | * a lower-powered state. | |
b913100d | 226 | */ |
1da177e4 LT |
227 | if (state < device->power.state) { |
228 | if (device->power.flags.power_resources) { | |
229 | result = acpi_power_transition(device, state); | |
230 | if (result) | |
231 | goto end; | |
232 | } | |
233 | if (device->power.states[state].flags.explicit_set) { | |
4be44fcd LB |
234 | status = acpi_evaluate_object(device->handle, |
235 | object_name, NULL, NULL); | |
1da177e4 LT |
236 | if (ACPI_FAILURE(status)) { |
237 | result = -ENODEV; | |
238 | goto end; | |
239 | } | |
240 | } | |
4be44fcd | 241 | } else { |
1da177e4 | 242 | if (device->power.states[state].flags.explicit_set) { |
4be44fcd LB |
243 | status = acpi_evaluate_object(device->handle, |
244 | object_name, NULL, NULL); | |
1da177e4 LT |
245 | if (ACPI_FAILURE(status)) { |
246 | result = -ENODEV; | |
247 | goto end; | |
248 | } | |
249 | } | |
250 | if (device->power.flags.power_resources) { | |
251 | result = acpi_power_transition(device, state); | |
252 | if (result) | |
253 | goto end; | |
254 | } | |
255 | } | |
256 | ||
4be44fcd | 257 | end: |
1da177e4 | 258 | if (result) |
cece9296 LB |
259 | printk(KERN_WARNING PREFIX |
260 | "Transitioning device [%s] to D%d\n", | |
261 | device->pnp.bus_id, state); | |
5e32132b SL |
262 | else { |
263 | device->power.state = state; | |
4be44fcd LB |
264 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
265 | "Device [%s] transitioned to D%d\n", | |
266 | device->pnp.bus_id, state)); | |
5e32132b | 267 | } |
1da177e4 | 268 | |
d550d98d | 269 | return result; |
1da177e4 | 270 | } |
1da177e4 | 271 | |
4be44fcd | 272 | EXPORT_SYMBOL(acpi_bus_set_power); |
1da177e4 LT |
273 | |
274 | /* -------------------------------------------------------------------------- | |
275 | Event Management | |
276 | -------------------------------------------------------------------------- */ | |
277 | ||
14e04fb3 | 278 | #ifdef CONFIG_ACPI_PROC_EVENT |
1da177e4 LT |
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 | |
8db85d4c | 286 | int acpi_bus_generate_proc_event4(const char *device_class, const char *bus_id, u8 type, int data) |
1da177e4 | 287 | { |
8db85d4c | 288 | struct acpi_bus_event *event; |
4be44fcd | 289 | unsigned long flags = 0; |
1da177e4 | 290 | |
1da177e4 LT |
291 | /* drop event on the floor if no one's listening */ |
292 | if (!event_is_open) | |
d550d98d | 293 | return 0; |
1da177e4 LT |
294 | |
295 | event = kmalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC); | |
296 | if (!event) | |
d550d98d | 297 | return -ENOMEM; |
1da177e4 | 298 | |
8db85d4c AS |
299 | strcpy(event->device_class, device_class); |
300 | strcpy(event->bus_id, bus_id); | |
1da177e4 LT |
301 | event->type = type; |
302 | event->data = data; | |
303 | ||
304 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
305 | list_add_tail(&event->node, &acpi_bus_event_list); | |
306 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); | |
307 | ||
308 | wake_up_interruptible(&acpi_bus_event_queue); | |
309 | ||
d550d98d | 310 | return 0; |
8db85d4c AS |
311 | |
312 | } | |
313 | ||
314 | EXPORT_SYMBOL_GPL(acpi_bus_generate_proc_event4); | |
315 | ||
316 | int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data) | |
317 | { | |
318 | if (!device) | |
319 | return -EINVAL; | |
320 | return acpi_bus_generate_proc_event4(device->pnp.device_class, | |
321 | device->pnp.bus_id, type, data); | |
1da177e4 | 322 | } |
4be44fcd | 323 | |
14e04fb3 | 324 | EXPORT_SYMBOL(acpi_bus_generate_proc_event); |
1da177e4 | 325 | |
4be44fcd | 326 | int acpi_bus_receive_event(struct acpi_bus_event *event) |
1da177e4 | 327 | { |
4be44fcd LB |
328 | unsigned long flags = 0; |
329 | struct acpi_bus_event *entry = NULL; | |
1da177e4 LT |
330 | |
331 | DECLARE_WAITQUEUE(wait, current); | |
332 | ||
1da177e4 LT |
333 | |
334 | if (!event) | |
d550d98d | 335 | return -EINVAL; |
1da177e4 LT |
336 | |
337 | if (list_empty(&acpi_bus_event_list)) { | |
338 | ||
339 | set_current_state(TASK_INTERRUPTIBLE); | |
340 | add_wait_queue(&acpi_bus_event_queue, &wait); | |
341 | ||
342 | if (list_empty(&acpi_bus_event_list)) | |
343 | schedule(); | |
344 | ||
345 | remove_wait_queue(&acpi_bus_event_queue, &wait); | |
346 | set_current_state(TASK_RUNNING); | |
347 | ||
348 | if (signal_pending(current)) | |
d550d98d | 349 | return -ERESTARTSYS; |
1da177e4 LT |
350 | } |
351 | ||
352 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
4be44fcd LB |
353 | entry = |
354 | list_entry(acpi_bus_event_list.next, struct acpi_bus_event, node); | |
1da177e4 LT |
355 | if (entry) |
356 | list_del(&entry->node); | |
357 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); | |
358 | ||
359 | if (!entry) | |
d550d98d | 360 | return -ENODEV; |
1da177e4 LT |
361 | |
362 | memcpy(event, entry, sizeof(struct acpi_bus_event)); | |
363 | ||
364 | kfree(entry); | |
365 | ||
d550d98d | 366 | return 0; |
1da177e4 | 367 | } |
1da177e4 | 368 | |
4be44fcd | 369 | EXPORT_SYMBOL(acpi_bus_receive_event); |
14e04fb3 | 370 | #endif /* CONFIG_ACPI_PROC_EVENT */ |
1da177e4 LT |
371 | |
372 | /* -------------------------------------------------------------------------- | |
373 | Notification Handling | |
374 | -------------------------------------------------------------------------- */ | |
375 | ||
376 | static int | |
4be44fcd | 377 | acpi_bus_check_device(struct acpi_device *device, int *status_changed) |
1da177e4 | 378 | { |
4be44fcd | 379 | acpi_status status = 0; |
1da177e4 LT |
380 | struct acpi_device_status old_status; |
381 | ||
1da177e4 LT |
382 | |
383 | if (!device) | |
d550d98d | 384 | return -EINVAL; |
1da177e4 LT |
385 | |
386 | if (status_changed) | |
387 | *status_changed = 0; | |
388 | ||
389 | old_status = device->status; | |
390 | ||
391 | /* | |
392 | * Make sure this device's parent is present before we go about | |
393 | * messing with the device. | |
394 | */ | |
395 | if (device->parent && !device->parent->status.present) { | |
396 | device->status = device->parent->status; | |
397 | if (STRUCT_TO_INT(old_status) != STRUCT_TO_INT(device->status)) { | |
398 | if (status_changed) | |
399 | *status_changed = 1; | |
400 | } | |
d550d98d | 401 | return 0; |
1da177e4 LT |
402 | } |
403 | ||
404 | status = acpi_bus_get_status(device); | |
405 | if (ACPI_FAILURE(status)) | |
d550d98d | 406 | return -ENODEV; |
1da177e4 LT |
407 | |
408 | if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status)) | |
d550d98d | 409 | return 0; |
1da177e4 LT |
410 | |
411 | if (status_changed) | |
412 | *status_changed = 1; | |
4be44fcd | 413 | |
1da177e4 LT |
414 | /* |
415 | * Device Insertion/Removal | |
416 | */ | |
417 | if ((device->status.present) && !(old_status.present)) { | |
418 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n")); | |
419 | /* TBD: Handle device insertion */ | |
4be44fcd | 420 | } else if (!(device->status.present) && (old_status.present)) { |
1da177e4 LT |
421 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n")); |
422 | /* TBD: Handle device removal */ | |
423 | } | |
424 | ||
d550d98d | 425 | return 0; |
1da177e4 LT |
426 | } |
427 | ||
4be44fcd | 428 | static int acpi_bus_check_scope(struct acpi_device *device) |
1da177e4 | 429 | { |
4be44fcd LB |
430 | int result = 0; |
431 | int status_changed = 0; | |
1da177e4 | 432 | |
1da177e4 LT |
433 | |
434 | if (!device) | |
d550d98d | 435 | return -EINVAL; |
1da177e4 LT |
436 | |
437 | /* Status Change? */ | |
438 | result = acpi_bus_check_device(device, &status_changed); | |
439 | if (result) | |
d550d98d | 440 | return result; |
1da177e4 LT |
441 | |
442 | if (!status_changed) | |
d550d98d | 443 | return 0; |
1da177e4 LT |
444 | |
445 | /* | |
446 | * TBD: Enumerate child devices within this device's scope and | |
447 | * run acpi_bus_check_device()'s on them. | |
448 | */ | |
449 | ||
d550d98d | 450 | return 0; |
1da177e4 LT |
451 | } |
452 | ||
1da177e4 LT |
453 | /** |
454 | * acpi_bus_notify | |
455 | * --------------- | |
456 | * Callback for all 'system-level' device notifications (values 0x00-0x7F). | |
457 | */ | |
4be44fcd | 458 | static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) |
1da177e4 | 459 | { |
4be44fcd LB |
460 | int result = 0; |
461 | struct acpi_device *device = NULL; | |
1da177e4 | 462 | |
1da177e4 LT |
463 | |
464 | if (acpi_bus_get_device(handle, &device)) | |
d550d98d | 465 | return; |
1da177e4 LT |
466 | |
467 | switch (type) { | |
468 | ||
469 | case ACPI_NOTIFY_BUS_CHECK: | |
4be44fcd LB |
470 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
471 | "Received BUS CHECK notification for device [%s]\n", | |
472 | device->pnp.bus_id)); | |
1da177e4 | 473 | result = acpi_bus_check_scope(device); |
aafbcd16 | 474 | /* |
1da177e4 | 475 | * TBD: We'll need to outsource certain events to non-ACPI |
4be44fcd | 476 | * drivers via the device manager (device.c). |
1da177e4 LT |
477 | */ |
478 | break; | |
479 | ||
480 | case ACPI_NOTIFY_DEVICE_CHECK: | |
4be44fcd LB |
481 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
482 | "Received DEVICE CHECK notification for device [%s]\n", | |
483 | device->pnp.bus_id)); | |
1da177e4 | 484 | result = acpi_bus_check_device(device, NULL); |
aafbcd16 | 485 | /* |
1da177e4 | 486 | * TBD: We'll need to outsource certain events to non-ACPI |
4be44fcd | 487 | * drivers via the device manager (device.c). |
1da177e4 LT |
488 | */ |
489 | break; | |
490 | ||
491 | case ACPI_NOTIFY_DEVICE_WAKE: | |
4be44fcd LB |
492 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
493 | "Received DEVICE WAKE notification for device [%s]\n", | |
494 | device->pnp.bus_id)); | |
1da177e4 LT |
495 | /* TBD */ |
496 | break; | |
497 | ||
498 | case ACPI_NOTIFY_EJECT_REQUEST: | |
4be44fcd LB |
499 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
500 | "Received EJECT REQUEST notification for device [%s]\n", | |
501 | device->pnp.bus_id)); | |
1da177e4 LT |
502 | /* TBD */ |
503 | break; | |
504 | ||
505 | case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: | |
4be44fcd LB |
506 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
507 | "Received DEVICE CHECK LIGHT notification for device [%s]\n", | |
508 | device->pnp.bus_id)); | |
1da177e4 LT |
509 | /* TBD: Exactly what does 'light' mean? */ |
510 | break; | |
511 | ||
512 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
4be44fcd LB |
513 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
514 | "Received FREQUENCY MISMATCH notification for device [%s]\n", | |
515 | device->pnp.bus_id)); | |
1da177e4 LT |
516 | /* TBD */ |
517 | break; | |
518 | ||
519 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
4be44fcd LB |
520 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
521 | "Received BUS MODE MISMATCH notification for device [%s]\n", | |
522 | device->pnp.bus_id)); | |
1da177e4 LT |
523 | /* TBD */ |
524 | break; | |
525 | ||
526 | case ACPI_NOTIFY_POWER_FAULT: | |
4be44fcd LB |
527 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
528 | "Received POWER FAULT notification for device [%s]\n", | |
529 | device->pnp.bus_id)); | |
1da177e4 LT |
530 | /* TBD */ |
531 | break; | |
532 | ||
533 | default: | |
4be44fcd LB |
534 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
535 | "Received unknown/unsupported notification [%08x]\n", | |
536 | type)); | |
1da177e4 LT |
537 | break; |
538 | } | |
539 | ||
d550d98d | 540 | return; |
1da177e4 LT |
541 | } |
542 | ||
543 | /* -------------------------------------------------------------------------- | |
544 | Initialization/Cleanup | |
545 | -------------------------------------------------------------------------- */ | |
546 | ||
4be44fcd | 547 | static int __init acpi_bus_init_irq(void) |
1da177e4 | 548 | { |
4be44fcd LB |
549 | acpi_status status = AE_OK; |
550 | union acpi_object arg = { ACPI_TYPE_INTEGER }; | |
551 | struct acpi_object_list arg_list = { 1, &arg }; | |
552 | char *message = NULL; | |
1da177e4 | 553 | |
1da177e4 | 554 | |
aafbcd16 | 555 | /* |
1da177e4 LT |
556 | * Let the system know what interrupt model we are using by |
557 | * evaluating the \_PIC object, if exists. | |
558 | */ | |
559 | ||
560 | switch (acpi_irq_model) { | |
561 | case ACPI_IRQ_MODEL_PIC: | |
562 | message = "PIC"; | |
563 | break; | |
564 | case ACPI_IRQ_MODEL_IOAPIC: | |
565 | message = "IOAPIC"; | |
566 | break; | |
567 | case ACPI_IRQ_MODEL_IOSAPIC: | |
568 | message = "IOSAPIC"; | |
569 | break; | |
3948ec94 JK |
570 | case ACPI_IRQ_MODEL_PLATFORM: |
571 | message = "platform specific model"; | |
572 | break; | |
1da177e4 LT |
573 | default: |
574 | printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n"); | |
d550d98d | 575 | return -ENODEV; |
1da177e4 LT |
576 | } |
577 | ||
578 | printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message); | |
579 | ||
580 | arg.integer.value = acpi_irq_model; | |
581 | ||
582 | status = acpi_evaluate_object(NULL, "\\_PIC", &arg_list, NULL); | |
583 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { | |
a6fc6720 | 584 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC")); |
d550d98d | 585 | return -ENODEV; |
1da177e4 LT |
586 | } |
587 | ||
d550d98d | 588 | return 0; |
1da177e4 LT |
589 | } |
590 | ||
ad71860a AS |
591 | acpi_native_uint acpi_gbl_permanent_mmap; |
592 | ||
593 | ||
4be44fcd | 594 | void __init acpi_early_init(void) |
1da177e4 | 595 | { |
4be44fcd | 596 | acpi_status status = AE_OK; |
1da177e4 LT |
597 | |
598 | if (acpi_disabled) | |
d550d98d | 599 | return; |
1da177e4 | 600 | |
61686124 BM |
601 | printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION); |
602 | ||
1da177e4 LT |
603 | /* enable workarounds, unless strict ACPI spec. compliance */ |
604 | if (!acpi_strict) | |
605 | acpi_gbl_enable_interpreter_slack = TRUE; | |
606 | ||
ad71860a AS |
607 | acpi_gbl_permanent_mmap = 1; |
608 | ||
609 | status = acpi_reallocate_root_table(); | |
610 | if (ACPI_FAILURE(status)) { | |
611 | printk(KERN_ERR PREFIX | |
612 | "Unable to reallocate ACPI tables\n"); | |
613 | goto error0; | |
614 | } | |
615 | ||
1da177e4 LT |
616 | status = acpi_initialize_subsystem(); |
617 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
618 | printk(KERN_ERR PREFIX |
619 | "Unable to initialize the ACPI Interpreter\n"); | |
1da177e4 LT |
620 | goto error0; |
621 | } | |
622 | ||
623 | status = acpi_load_tables(); | |
624 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
625 | printk(KERN_ERR PREFIX |
626 | "Unable to load the System Description Tables\n"); | |
1da177e4 LT |
627 | goto error0; |
628 | } | |
629 | ||
1da177e4 LT |
630 | #ifdef CONFIG_X86 |
631 | if (!acpi_ioapic) { | |
5f3b1a8b | 632 | extern u8 acpi_sci_flags; |
1da177e4 LT |
633 | |
634 | /* compatible (0) means level (3) */ | |
5f3b1a8b AS |
635 | if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) { |
636 | acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK; | |
637 | acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL; | |
638 | } | |
1da177e4 | 639 | /* Set PIC-mode SCI trigger type */ |
cee324b1 | 640 | acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt, |
5f3b1a8b | 641 | (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2); |
1da177e4 LT |
642 | } else { |
643 | extern int acpi_sci_override_gsi; | |
644 | /* | |
cee324b1 | 645 | * now that acpi_gbl_FADT is initialized, |
1da177e4 LT |
646 | * update it with result from INT_SRC_OVR parsing |
647 | */ | |
cee324b1 | 648 | acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi; |
1da177e4 LT |
649 | } |
650 | #endif | |
651 | ||
4be44fcd LB |
652 | status = |
653 | acpi_enable_subsystem(~ | |
654 | (ACPI_NO_HARDWARE_INIT | | |
655 | ACPI_NO_ACPI_ENABLE)); | |
1da177e4 LT |
656 | if (ACPI_FAILURE(status)) { |
657 | printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); | |
658 | goto error0; | |
659 | } | |
660 | ||
d550d98d | 661 | return; |
1da177e4 | 662 | |
4be44fcd | 663 | error0: |
1da177e4 | 664 | disable_acpi(); |
d550d98d | 665 | return; |
1da177e4 LT |
666 | } |
667 | ||
4be44fcd | 668 | static int __init acpi_bus_init(void) |
1da177e4 | 669 | { |
4be44fcd LB |
670 | int result = 0; |
671 | acpi_status status = AE_OK; | |
672 | extern acpi_status acpi_os_initialize1(void); | |
1da177e4 | 673 | |
1da177e4 LT |
674 | |
675 | status = acpi_os_initialize1(); | |
676 | ||
4be44fcd LB |
677 | status = |
678 | acpi_enable_subsystem(ACPI_NO_HARDWARE_INIT | ACPI_NO_ACPI_ENABLE); | |
1da177e4 | 679 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
680 | printk(KERN_ERR PREFIX |
681 | "Unable to start the ACPI Interpreter\n"); | |
1da177e4 LT |
682 | goto error1; |
683 | } | |
684 | ||
685 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
686 | printk(KERN_ERR PREFIX |
687 | "Unable to initialize ACPI OS objects\n"); | |
1da177e4 LT |
688 | goto error1; |
689 | } | |
690 | #ifdef CONFIG_ACPI_EC | |
691 | /* | |
692 | * ACPI 2.0 requires the EC driver to be loaded and work before | |
693 | * the EC device is found in the namespace (i.e. before acpi_initialize_objects() | |
694 | * is called). | |
695 | * | |
aafbcd16 | 696 | * This is accomplished by looking for the ECDT table, and getting |
1da177e4 LT |
697 | * the EC parameters out of that. |
698 | */ | |
699 | status = acpi_ec_ecdt_probe(); | |
700 | /* Ignore result. Not having an ECDT is not fatal. */ | |
701 | #endif | |
702 | ||
703 | status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); | |
704 | if (ACPI_FAILURE(status)) { | |
705 | printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); | |
706 | goto error1; | |
707 | } | |
708 | ||
709 | printk(KERN_INFO PREFIX "Interpreter enabled\n"); | |
710 | ||
aafbcd16 AS |
711 | /* Initialize sleep structures */ |
712 | acpi_sleep_init(); | |
713 | ||
1da177e4 LT |
714 | /* |
715 | * Get the system interrupt model and evaluate \_PIC. | |
716 | */ | |
717 | result = acpi_bus_init_irq(); | |
718 | if (result) | |
719 | goto error1; | |
720 | ||
721 | /* | |
722 | * Register the for all standard device notifications. | |
723 | */ | |
4be44fcd LB |
724 | status = |
725 | acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, | |
726 | &acpi_bus_notify, NULL); | |
1da177e4 | 727 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
728 | printk(KERN_ERR PREFIX |
729 | "Unable to register for device notifications\n"); | |
1da177e4 LT |
730 | goto error1; |
731 | } | |
732 | ||
733 | /* | |
734 | * Create the top ACPI proc directory | |
735 | */ | |
736 | acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); | |
737 | ||
d550d98d | 738 | return 0; |
1da177e4 LT |
739 | |
740 | /* Mimic structured exception handling */ | |
4be44fcd | 741 | error1: |
1da177e4 | 742 | acpi_terminate(); |
d550d98d | 743 | return -ENODEV; |
1da177e4 LT |
744 | } |
745 | ||
3514faca | 746 | decl_subsys(acpi, NULL); |
1da177e4 | 747 | |
4be44fcd | 748 | static int __init acpi_init(void) |
1da177e4 | 749 | { |
4be44fcd | 750 | int result = 0; |
1da177e4 | 751 | |
1da177e4 | 752 | |
1da177e4 LT |
753 | if (acpi_disabled) { |
754 | printk(KERN_INFO PREFIX "Interpreter disabled.\n"); | |
d550d98d | 755 | return -ENODEV; |
1da177e4 LT |
756 | } |
757 | ||
d568df84 RD |
758 | result = firmware_register(&acpi_subsys); |
759 | if (result < 0) | |
760 | printk(KERN_WARNING "%s: firmware_register error: %d\n", | |
761 | __FUNCTION__, result); | |
1da177e4 LT |
762 | |
763 | result = acpi_bus_init(); | |
764 | ||
765 | if (!result) { | |
9f9adecd LB |
766 | if (!(pm_flags & PM_APM)) |
767 | pm_flags |= PM_ACPI; | |
1da177e4 | 768 | else { |
4be44fcd LB |
769 | printk(KERN_INFO PREFIX |
770 | "APM is already active, exiting\n"); | |
1da177e4 LT |
771 | disable_acpi(); |
772 | result = -ENODEV; | |
773 | } | |
1da177e4 LT |
774 | } else |
775 | disable_acpi(); | |
776 | ||
d550d98d | 777 | return result; |
1da177e4 LT |
778 | } |
779 | ||
780 | subsys_initcall(acpi_init); |