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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> | |
6697c052 | 34 | #include <linux/acpi.h> |
1da177e4 LT |
35 | #ifdef CONFIG_X86 |
36 | #include <asm/mpspec.h> | |
37 | #endif | |
7752d5cf | 38 | #include <linux/pci.h> |
1da177e4 LT |
39 | #include <acpi/acpi_bus.h> |
40 | #include <acpi/acpi_drivers.h> | |
eb27cae8 | 41 | #include <linux/dmi.h> |
1da177e4 | 42 | |
e60cc7a6 BH |
43 | #include "internal.h" |
44 | ||
1da177e4 | 45 | #define _COMPONENT ACPI_BUS_COMPONENT |
f52fd66d | 46 | ACPI_MODULE_NAME("bus"); |
1da177e4 | 47 | |
4be44fcd LB |
48 | struct acpi_device *acpi_root; |
49 | struct proc_dir_entry *acpi_root_dir; | |
1da177e4 LT |
50 | EXPORT_SYMBOL(acpi_root_dir); |
51 | ||
52 | #define STRUCT_TO_INT(s) (*((int*)&s)) | |
53 | ||
6415e12b ZY |
54 | static int set_power_nocheck(const struct dmi_system_id *id) |
55 | { | |
56 | printk(KERN_NOTICE PREFIX "%s detected - " | |
57 | "disable power check in power transistion\n", id->ident); | |
58 | acpi_power_nocheck = 1; | |
59 | return 0; | |
60 | } | |
61 | static struct dmi_system_id __cpuinitdata power_nocheck_dmi_table[] = { | |
62 | { | |
63 | set_power_nocheck, "HP Pavilion 05", { | |
64 | DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"), | |
65 | DMI_MATCH(DMI_SYS_VENDOR, "HP Pavilion 05"), | |
66 | DMI_MATCH(DMI_PRODUCT_VERSION, "2001211RE101GLEND") }, NULL}, | |
67 | {}, | |
68 | }; | |
69 | ||
70 | ||
1da177e4 LT |
71 | /* -------------------------------------------------------------------------- |
72 | Device Management | |
73 | -------------------------------------------------------------------------- */ | |
74 | ||
4be44fcd | 75 | int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device) |
1da177e4 | 76 | { |
4be44fcd | 77 | acpi_status status = AE_OK; |
1da177e4 | 78 | |
1da177e4 LT |
79 | |
80 | if (!device) | |
d550d98d | 81 | return -EINVAL; |
1da177e4 LT |
82 | |
83 | /* TBD: Support fixed-feature devices */ | |
84 | ||
4be44fcd | 85 | status = acpi_get_data(handle, acpi_bus_data_handler, (void **)device); |
1da177e4 | 86 | if (ACPI_FAILURE(status) || !*device) { |
9805cb76 LB |
87 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", |
88 | handle)); | |
d550d98d | 89 | return -ENODEV; |
1da177e4 LT |
90 | } |
91 | ||
d550d98d | 92 | return 0; |
1da177e4 | 93 | } |
4be44fcd | 94 | |
1da177e4 LT |
95 | EXPORT_SYMBOL(acpi_bus_get_device); |
96 | ||
402ac536 BH |
97 | acpi_status acpi_bus_get_status_handle(acpi_handle handle, |
98 | unsigned long long *sta) | |
1da177e4 | 99 | { |
402ac536 | 100 | acpi_status status; |
4be44fcd | 101 | |
402ac536 BH |
102 | status = acpi_evaluate_integer(handle, "_STA", NULL, sta); |
103 | if (ACPI_SUCCESS(status)) | |
104 | return AE_OK; | |
1da177e4 | 105 | |
402ac536 BH |
106 | if (status == AE_NOT_FOUND) { |
107 | *sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | | |
108 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; | |
109 | return AE_OK; | |
1da177e4 | 110 | } |
402ac536 BH |
111 | return status; |
112 | } | |
1da177e4 | 113 | |
402ac536 BH |
114 | int acpi_bus_get_status(struct acpi_device *device) |
115 | { | |
116 | acpi_status status; | |
117 | unsigned long long sta; | |
118 | ||
119 | status = acpi_bus_get_status_handle(device->handle, &sta); | |
120 | if (ACPI_FAILURE(status)) | |
121 | return -ENODEV; | |
122 | ||
123 | STRUCT_TO_INT(device->status) = (int) sta; | |
1da177e4 LT |
124 | |
125 | if (device->status.functional && !device->status.present) { | |
39a0ad87 ZY |
126 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: " |
127 | "functional but not present;\n", | |
128 | device->pnp.bus_id, | |
129 | (u32) STRUCT_TO_INT(device->status))); | |
1da177e4 LT |
130 | } |
131 | ||
4be44fcd LB |
132 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n", |
133 | device->pnp.bus_id, | |
134 | (u32) STRUCT_TO_INT(device->status))); | |
d550d98d | 135 | return 0; |
1da177e4 | 136 | } |
4be44fcd | 137 | EXPORT_SYMBOL(acpi_bus_get_status); |
1da177e4 | 138 | |
20733939 | 139 | void acpi_bus_private_data_handler(acpi_handle handle, |
8e4319c4 | 140 | void *context) |
20733939 ZR |
141 | { |
142 | return; | |
143 | } | |
144 | EXPORT_SYMBOL(acpi_bus_private_data_handler); | |
145 | ||
146 | int acpi_bus_get_private_data(acpi_handle handle, void **data) | |
147 | { | |
148 | acpi_status status = AE_OK; | |
149 | ||
150 | if (!*data) | |
151 | return -EINVAL; | |
152 | ||
153 | status = acpi_get_data(handle, acpi_bus_private_data_handler, data); | |
154 | if (ACPI_FAILURE(status) || !*data) { | |
155 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", | |
156 | handle)); | |
157 | return -ENODEV; | |
158 | } | |
159 | ||
160 | return 0; | |
161 | } | |
162 | EXPORT_SYMBOL(acpi_bus_get_private_data); | |
163 | ||
1da177e4 LT |
164 | /* -------------------------------------------------------------------------- |
165 | Power Management | |
166 | -------------------------------------------------------------------------- */ | |
167 | ||
4be44fcd | 168 | int acpi_bus_get_power(acpi_handle handle, int *state) |
1da177e4 | 169 | { |
4be44fcd LB |
170 | int result = 0; |
171 | acpi_status status = 0; | |
172 | struct acpi_device *device = NULL; | |
27663c58 | 173 | unsigned long long psc = 0; |
1da177e4 | 174 | |
1da177e4 LT |
175 | |
176 | result = acpi_bus_get_device(handle, &device); | |
177 | if (result) | |
d550d98d | 178 | return result; |
1da177e4 LT |
179 | |
180 | *state = ACPI_STATE_UNKNOWN; | |
181 | ||
182 | if (!device->flags.power_manageable) { | |
183 | /* TBD: Non-recursive algorithm for walking up hierarchy */ | |
184 | if (device->parent) | |
185 | *state = device->parent->power.state; | |
186 | else | |
187 | *state = ACPI_STATE_D0; | |
4be44fcd | 188 | } else { |
1da177e4 | 189 | /* |
aafbcd16 | 190 | * Get the device's power state either directly (via _PSC) or |
1da177e4 LT |
191 | * indirectly (via power resources). |
192 | */ | |
193 | if (device->power.flags.explicit_get) { | |
4be44fcd LB |
194 | status = acpi_evaluate_integer(device->handle, "_PSC", |
195 | NULL, &psc); | |
1da177e4 | 196 | if (ACPI_FAILURE(status)) |
d550d98d | 197 | return -ENODEV; |
4be44fcd LB |
198 | device->power.state = (int)psc; |
199 | } else if (device->power.flags.power_resources) { | |
1da177e4 LT |
200 | result = acpi_power_get_inferred_state(device); |
201 | if (result) | |
d550d98d | 202 | return result; |
1da177e4 LT |
203 | } |
204 | ||
205 | *state = device->power.state; | |
206 | } | |
207 | ||
208 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] power state is D%d\n", | |
4be44fcd | 209 | device->pnp.bus_id, device->power.state)); |
1da177e4 | 210 | |
d550d98d | 211 | return 0; |
1da177e4 | 212 | } |
1da177e4 | 213 | |
4be44fcd | 214 | EXPORT_SYMBOL(acpi_bus_get_power); |
1da177e4 | 215 | |
4be44fcd | 216 | int acpi_bus_set_power(acpi_handle handle, int state) |
1da177e4 | 217 | { |
4be44fcd LB |
218 | int result = 0; |
219 | acpi_status status = AE_OK; | |
220 | struct acpi_device *device = NULL; | |
221 | char object_name[5] = { '_', 'P', 'S', '0' + state, '\0' }; | |
1da177e4 | 222 | |
1da177e4 LT |
223 | |
224 | result = acpi_bus_get_device(handle, &device); | |
225 | if (result) | |
d550d98d | 226 | return result; |
1da177e4 LT |
227 | |
228 | if ((state < ACPI_STATE_D0) || (state > ACPI_STATE_D3)) | |
d550d98d | 229 | return -EINVAL; |
1da177e4 LT |
230 | |
231 | /* Make sure this is a valid target state */ | |
232 | ||
233 | if (!device->flags.power_manageable) { | |
9805cb76 | 234 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device `[%s]' is not power manageable\n", |
19c38de8 | 235 | kobject_name(&device->dev.kobj))); |
d550d98d | 236 | return -ENODEV; |
1da177e4 | 237 | } |
b913100d | 238 | /* |
c35923bc | 239 | * Get device's current power state |
b913100d | 240 | */ |
f5adfaa3 ZY |
241 | if (!acpi_power_nocheck) { |
242 | /* | |
243 | * Maybe the incorrect power state is returned on the bogus | |
244 | * bios, which is different with the real power state. | |
245 | * For example: the bios returns D0 state and the real power | |
246 | * state is D3. OS expects to set the device to D0 state. In | |
247 | * such case if OS uses the power state returned by the BIOS, | |
248 | * the device can't be transisted to the correct power state. | |
249 | * So if the acpi_power_nocheck is set, it is unnecessary to | |
250 | * get the power state by calling acpi_bus_get_power. | |
251 | */ | |
252 | acpi_bus_get_power(device->handle, &device->power.state); | |
253 | } | |
ec68373c | 254 | if ((state == device->power.state) && !device->flags.force_power_state) { |
b1028c54 KK |
255 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n", |
256 | state)); | |
257 | return 0; | |
1da177e4 | 258 | } |
b1028c54 | 259 | |
1da177e4 | 260 | if (!device->power.states[state].flags.valid) { |
cece9296 | 261 | printk(KERN_WARNING PREFIX "Device does not support D%d\n", state); |
d550d98d | 262 | return -ENODEV; |
1da177e4 LT |
263 | } |
264 | if (device->parent && (state < device->parent->power.state)) { | |
cece9296 | 265 | printk(KERN_WARNING PREFIX |
a6fc6720 | 266 | "Cannot set device to a higher-powered" |
cece9296 | 267 | " state than parent\n"); |
d550d98d | 268 | return -ENODEV; |
1da177e4 LT |
269 | } |
270 | ||
271 | /* | |
272 | * Transition Power | |
273 | * ---------------- | |
274 | * On transitions to a high-powered state we first apply power (via | |
275 | * power resources) then evalute _PSx. Conversly for transitions to | |
276 | * a lower-powered state. | |
b913100d | 277 | */ |
1da177e4 LT |
278 | if (state < device->power.state) { |
279 | if (device->power.flags.power_resources) { | |
280 | result = acpi_power_transition(device, state); | |
281 | if (result) | |
282 | goto end; | |
283 | } | |
284 | if (device->power.states[state].flags.explicit_set) { | |
4be44fcd LB |
285 | status = acpi_evaluate_object(device->handle, |
286 | object_name, NULL, NULL); | |
1da177e4 LT |
287 | if (ACPI_FAILURE(status)) { |
288 | result = -ENODEV; | |
289 | goto end; | |
290 | } | |
291 | } | |
4be44fcd | 292 | } else { |
1da177e4 | 293 | if (device->power.states[state].flags.explicit_set) { |
4be44fcd LB |
294 | status = acpi_evaluate_object(device->handle, |
295 | object_name, NULL, NULL); | |
1da177e4 LT |
296 | if (ACPI_FAILURE(status)) { |
297 | result = -ENODEV; | |
298 | goto end; | |
299 | } | |
300 | } | |
301 | if (device->power.flags.power_resources) { | |
302 | result = acpi_power_transition(device, state); | |
303 | if (result) | |
304 | goto end; | |
305 | } | |
306 | } | |
307 | ||
4be44fcd | 308 | end: |
1da177e4 | 309 | if (result) |
cece9296 | 310 | printk(KERN_WARNING PREFIX |
ddc50b6a | 311 | "Device [%s] failed to transition to D%d\n", |
cece9296 | 312 | device->pnp.bus_id, state); |
5e32132b SL |
313 | else { |
314 | device->power.state = state; | |
4be44fcd LB |
315 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
316 | "Device [%s] transitioned to D%d\n", | |
317 | device->pnp.bus_id, state)); | |
5e32132b | 318 | } |
1da177e4 | 319 | |
d550d98d | 320 | return result; |
1da177e4 | 321 | } |
1da177e4 | 322 | |
4be44fcd | 323 | EXPORT_SYMBOL(acpi_bus_set_power); |
1da177e4 | 324 | |
3737b2b1 RW |
325 | bool acpi_bus_power_manageable(acpi_handle handle) |
326 | { | |
327 | struct acpi_device *device; | |
328 | int result; | |
329 | ||
330 | result = acpi_bus_get_device(handle, &device); | |
331 | return result ? false : device->flags.power_manageable; | |
332 | } | |
333 | ||
334 | EXPORT_SYMBOL(acpi_bus_power_manageable); | |
335 | ||
eb9d0fe4 RW |
336 | bool acpi_bus_can_wakeup(acpi_handle handle) |
337 | { | |
338 | struct acpi_device *device; | |
339 | int result; | |
340 | ||
341 | result = acpi_bus_get_device(handle, &device); | |
342 | return result ? false : device->wakeup.flags.valid; | |
343 | } | |
344 | ||
345 | EXPORT_SYMBOL(acpi_bus_can_wakeup); | |
346 | ||
1da177e4 LT |
347 | /* -------------------------------------------------------------------------- |
348 | Event Management | |
349 | -------------------------------------------------------------------------- */ | |
350 | ||
14e04fb3 | 351 | #ifdef CONFIG_ACPI_PROC_EVENT |
1da177e4 LT |
352 | static DEFINE_SPINLOCK(acpi_bus_event_lock); |
353 | ||
354 | LIST_HEAD(acpi_bus_event_list); | |
355 | DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue); | |
356 | ||
4be44fcd | 357 | extern int event_is_open; |
1da177e4 | 358 | |
8db85d4c | 359 | int acpi_bus_generate_proc_event4(const char *device_class, const char *bus_id, u8 type, int data) |
1da177e4 | 360 | { |
8db85d4c | 361 | struct acpi_bus_event *event; |
4be44fcd | 362 | unsigned long flags = 0; |
1da177e4 | 363 | |
1da177e4 LT |
364 | /* drop event on the floor if no one's listening */ |
365 | if (!event_is_open) | |
d550d98d | 366 | return 0; |
1da177e4 LT |
367 | |
368 | event = kmalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC); | |
369 | if (!event) | |
d550d98d | 370 | return -ENOMEM; |
1da177e4 | 371 | |
8db85d4c AS |
372 | strcpy(event->device_class, device_class); |
373 | strcpy(event->bus_id, bus_id); | |
1da177e4 LT |
374 | event->type = type; |
375 | event->data = data; | |
376 | ||
377 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
378 | list_add_tail(&event->node, &acpi_bus_event_list); | |
379 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); | |
380 | ||
381 | wake_up_interruptible(&acpi_bus_event_queue); | |
382 | ||
d550d98d | 383 | return 0; |
8db85d4c AS |
384 | |
385 | } | |
386 | ||
387 | EXPORT_SYMBOL_GPL(acpi_bus_generate_proc_event4); | |
388 | ||
389 | int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data) | |
390 | { | |
391 | if (!device) | |
392 | return -EINVAL; | |
393 | return acpi_bus_generate_proc_event4(device->pnp.device_class, | |
394 | device->pnp.bus_id, type, data); | |
1da177e4 | 395 | } |
4be44fcd | 396 | |
14e04fb3 | 397 | EXPORT_SYMBOL(acpi_bus_generate_proc_event); |
1da177e4 | 398 | |
4be44fcd | 399 | int acpi_bus_receive_event(struct acpi_bus_event *event) |
1da177e4 | 400 | { |
4be44fcd LB |
401 | unsigned long flags = 0; |
402 | struct acpi_bus_event *entry = NULL; | |
1da177e4 LT |
403 | |
404 | DECLARE_WAITQUEUE(wait, current); | |
405 | ||
1da177e4 LT |
406 | |
407 | if (!event) | |
d550d98d | 408 | return -EINVAL; |
1da177e4 LT |
409 | |
410 | if (list_empty(&acpi_bus_event_list)) { | |
411 | ||
412 | set_current_state(TASK_INTERRUPTIBLE); | |
413 | add_wait_queue(&acpi_bus_event_queue, &wait); | |
414 | ||
415 | if (list_empty(&acpi_bus_event_list)) | |
416 | schedule(); | |
417 | ||
418 | remove_wait_queue(&acpi_bus_event_queue, &wait); | |
419 | set_current_state(TASK_RUNNING); | |
420 | ||
421 | if (signal_pending(current)) | |
d550d98d | 422 | return -ERESTARTSYS; |
1da177e4 LT |
423 | } |
424 | ||
425 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
f0a37e00 CE |
426 | if (!list_empty(&acpi_bus_event_list)) { |
427 | entry = list_entry(acpi_bus_event_list.next, | |
428 | struct acpi_bus_event, node); | |
1da177e4 | 429 | list_del(&entry->node); |
f0a37e00 | 430 | } |
1da177e4 LT |
431 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); |
432 | ||
433 | if (!entry) | |
d550d98d | 434 | return -ENODEV; |
1da177e4 LT |
435 | |
436 | memcpy(event, entry, sizeof(struct acpi_bus_event)); | |
437 | ||
438 | kfree(entry); | |
439 | ||
d550d98d | 440 | return 0; |
1da177e4 | 441 | } |
1da177e4 | 442 | |
14e04fb3 | 443 | #endif /* CONFIG_ACPI_PROC_EVENT */ |
1da177e4 LT |
444 | |
445 | /* -------------------------------------------------------------------------- | |
446 | Notification Handling | |
447 | -------------------------------------------------------------------------- */ | |
448 | ||
ff754e2e | 449 | static void acpi_bus_check_device(acpi_handle handle) |
1da177e4 | 450 | { |
ff754e2e | 451 | struct acpi_device *device; |
cdd5b8ca | 452 | acpi_status status; |
1da177e4 LT |
453 | struct acpi_device_status old_status; |
454 | ||
ff754e2e BH |
455 | if (acpi_bus_get_device(handle, &device)) |
456 | return; | |
1da177e4 | 457 | if (!device) |
cdd5b8ca | 458 | return; |
1da177e4 | 459 | |
1da177e4 LT |
460 | old_status = device->status; |
461 | ||
462 | /* | |
463 | * Make sure this device's parent is present before we go about | |
464 | * messing with the device. | |
465 | */ | |
466 | if (device->parent && !device->parent->status.present) { | |
467 | device->status = device->parent->status; | |
cdd5b8ca | 468 | return; |
1da177e4 LT |
469 | } |
470 | ||
471 | status = acpi_bus_get_status(device); | |
472 | if (ACPI_FAILURE(status)) | |
cdd5b8ca | 473 | return; |
1da177e4 LT |
474 | |
475 | if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status)) | |
cdd5b8ca | 476 | return; |
1da177e4 | 477 | |
1da177e4 LT |
478 | /* |
479 | * Device Insertion/Removal | |
480 | */ | |
481 | if ((device->status.present) && !(old_status.present)) { | |
482 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n")); | |
483 | /* TBD: Handle device insertion */ | |
4be44fcd | 484 | } else if (!(device->status.present) && (old_status.present)) { |
1da177e4 LT |
485 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n")); |
486 | /* TBD: Handle device removal */ | |
487 | } | |
1da177e4 LT |
488 | } |
489 | ||
ff754e2e | 490 | static void acpi_bus_check_scope(acpi_handle handle) |
1da177e4 | 491 | { |
1da177e4 | 492 | /* Status Change? */ |
ff754e2e | 493 | acpi_bus_check_device(handle); |
1da177e4 | 494 | |
1da177e4 LT |
495 | /* |
496 | * TBD: Enumerate child devices within this device's scope and | |
497 | * run acpi_bus_check_device()'s on them. | |
498 | */ | |
1da177e4 LT |
499 | } |
500 | ||
6bd00a61 SL |
501 | static BLOCKING_NOTIFIER_HEAD(acpi_bus_notify_list); |
502 | int register_acpi_bus_notifier(struct notifier_block *nb) | |
503 | { | |
504 | return blocking_notifier_chain_register(&acpi_bus_notify_list, nb); | |
505 | } | |
506 | EXPORT_SYMBOL_GPL(register_acpi_bus_notifier); | |
507 | ||
508 | void unregister_acpi_bus_notifier(struct notifier_block *nb) | |
509 | { | |
510 | blocking_notifier_chain_unregister(&acpi_bus_notify_list, nb); | |
511 | } | |
512 | EXPORT_SYMBOL_GPL(unregister_acpi_bus_notifier); | |
513 | ||
1da177e4 LT |
514 | /** |
515 | * acpi_bus_notify | |
516 | * --------------- | |
517 | * Callback for all 'system-level' device notifications (values 0x00-0x7F). | |
518 | */ | |
4be44fcd | 519 | static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) |
1da177e4 | 520 | { |
4be44fcd | 521 | struct acpi_device *device = NULL; |
6d278131 | 522 | struct acpi_driver *driver; |
1da177e4 | 523 | |
02c37bd8 BH |
524 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Notification %#02x to handle %p\n", |
525 | type, handle)); | |
526 | ||
6bd00a61 SL |
527 | blocking_notifier_call_chain(&acpi_bus_notify_list, |
528 | type, (void *)handle); | |
1da177e4 | 529 | |
1da177e4 LT |
530 | switch (type) { |
531 | ||
532 | case ACPI_NOTIFY_BUS_CHECK: | |
ff754e2e | 533 | acpi_bus_check_scope(handle); |
aafbcd16 | 534 | /* |
1da177e4 | 535 | * TBD: We'll need to outsource certain events to non-ACPI |
4be44fcd | 536 | * drivers via the device manager (device.c). |
1da177e4 LT |
537 | */ |
538 | break; | |
539 | ||
540 | case ACPI_NOTIFY_DEVICE_CHECK: | |
ff754e2e | 541 | acpi_bus_check_device(handle); |
aafbcd16 | 542 | /* |
1da177e4 | 543 | * TBD: We'll need to outsource certain events to non-ACPI |
4be44fcd | 544 | * drivers via the device manager (device.c). |
1da177e4 LT |
545 | */ |
546 | break; | |
547 | ||
548 | case ACPI_NOTIFY_DEVICE_WAKE: | |
1da177e4 LT |
549 | /* TBD */ |
550 | break; | |
551 | ||
552 | case ACPI_NOTIFY_EJECT_REQUEST: | |
1da177e4 LT |
553 | /* TBD */ |
554 | break; | |
555 | ||
556 | case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: | |
1da177e4 LT |
557 | /* TBD: Exactly what does 'light' mean? */ |
558 | break; | |
559 | ||
560 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
1da177e4 LT |
561 | /* TBD */ |
562 | break; | |
563 | ||
564 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
1da177e4 LT |
565 | /* TBD */ |
566 | break; | |
567 | ||
568 | case ACPI_NOTIFY_POWER_FAULT: | |
1da177e4 LT |
569 | /* TBD */ |
570 | break; | |
571 | ||
572 | default: | |
4be44fcd LB |
573 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
574 | "Received unknown/unsupported notification [%08x]\n", | |
575 | type)); | |
1da177e4 LT |
576 | break; |
577 | } | |
578 | ||
ff754e2e BH |
579 | acpi_bus_get_device(handle, &device); |
580 | if (device) { | |
581 | driver = device->driver; | |
582 | if (driver && driver->ops.notify && | |
583 | (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS)) | |
584 | driver->ops.notify(device, type); | |
585 | } | |
1da177e4 LT |
586 | } |
587 | ||
588 | /* -------------------------------------------------------------------------- | |
589 | Initialization/Cleanup | |
590 | -------------------------------------------------------------------------- */ | |
591 | ||
4be44fcd | 592 | static int __init acpi_bus_init_irq(void) |
1da177e4 | 593 | { |
4be44fcd LB |
594 | acpi_status status = AE_OK; |
595 | union acpi_object arg = { ACPI_TYPE_INTEGER }; | |
596 | struct acpi_object_list arg_list = { 1, &arg }; | |
597 | char *message = NULL; | |
1da177e4 | 598 | |
1da177e4 | 599 | |
aafbcd16 | 600 | /* |
1da177e4 LT |
601 | * Let the system know what interrupt model we are using by |
602 | * evaluating the \_PIC object, if exists. | |
603 | */ | |
604 | ||
605 | switch (acpi_irq_model) { | |
606 | case ACPI_IRQ_MODEL_PIC: | |
607 | message = "PIC"; | |
608 | break; | |
609 | case ACPI_IRQ_MODEL_IOAPIC: | |
610 | message = "IOAPIC"; | |
611 | break; | |
612 | case ACPI_IRQ_MODEL_IOSAPIC: | |
613 | message = "IOSAPIC"; | |
614 | break; | |
3948ec94 JK |
615 | case ACPI_IRQ_MODEL_PLATFORM: |
616 | message = "platform specific model"; | |
617 | break; | |
1da177e4 LT |
618 | default: |
619 | printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n"); | |
d550d98d | 620 | return -ENODEV; |
1da177e4 LT |
621 | } |
622 | ||
623 | printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message); | |
624 | ||
625 | arg.integer.value = acpi_irq_model; | |
626 | ||
627 | status = acpi_evaluate_object(NULL, "\\_PIC", &arg_list, NULL); | |
628 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { | |
a6fc6720 | 629 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC")); |
d550d98d | 630 | return -ENODEV; |
1da177e4 LT |
631 | } |
632 | ||
d550d98d | 633 | return 0; |
1da177e4 LT |
634 | } |
635 | ||
67a119f9 | 636 | u8 acpi_gbl_permanent_mmap; |
ad71860a AS |
637 | |
638 | ||
4be44fcd | 639 | void __init acpi_early_init(void) |
1da177e4 | 640 | { |
4be44fcd | 641 | acpi_status status = AE_OK; |
1da177e4 LT |
642 | |
643 | if (acpi_disabled) | |
d550d98d | 644 | return; |
1da177e4 | 645 | |
61686124 BM |
646 | printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION); |
647 | ||
1da177e4 LT |
648 | /* enable workarounds, unless strict ACPI spec. compliance */ |
649 | if (!acpi_strict) | |
650 | acpi_gbl_enable_interpreter_slack = TRUE; | |
651 | ||
ad71860a AS |
652 | acpi_gbl_permanent_mmap = 1; |
653 | ||
654 | status = acpi_reallocate_root_table(); | |
655 | if (ACPI_FAILURE(status)) { | |
656 | printk(KERN_ERR PREFIX | |
657 | "Unable to reallocate ACPI tables\n"); | |
658 | goto error0; | |
659 | } | |
660 | ||
1da177e4 LT |
661 | status = acpi_initialize_subsystem(); |
662 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
663 | printk(KERN_ERR PREFIX |
664 | "Unable to initialize the ACPI Interpreter\n"); | |
1da177e4 LT |
665 | goto error0; |
666 | } | |
667 | ||
668 | status = acpi_load_tables(); | |
669 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
670 | printk(KERN_ERR PREFIX |
671 | "Unable to load the System Description Tables\n"); | |
1da177e4 LT |
672 | goto error0; |
673 | } | |
674 | ||
1da177e4 LT |
675 | #ifdef CONFIG_X86 |
676 | if (!acpi_ioapic) { | |
1da177e4 | 677 | /* compatible (0) means level (3) */ |
5f3b1a8b AS |
678 | if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) { |
679 | acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK; | |
680 | acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL; | |
681 | } | |
1da177e4 | 682 | /* Set PIC-mode SCI trigger type */ |
cee324b1 | 683 | acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt, |
5f3b1a8b | 684 | (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2); |
1da177e4 | 685 | } else { |
1da177e4 | 686 | /* |
cee324b1 | 687 | * now that acpi_gbl_FADT is initialized, |
1da177e4 LT |
688 | * update it with result from INT_SRC_OVR parsing |
689 | */ | |
cee324b1 | 690 | acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi; |
1da177e4 LT |
691 | } |
692 | #endif | |
693 | ||
4be44fcd LB |
694 | status = |
695 | acpi_enable_subsystem(~ | |
696 | (ACPI_NO_HARDWARE_INIT | | |
697 | ACPI_NO_ACPI_ENABLE)); | |
1da177e4 LT |
698 | if (ACPI_FAILURE(status)) { |
699 | printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); | |
700 | goto error0; | |
701 | } | |
702 | ||
d550d98d | 703 | return; |
1da177e4 | 704 | |
4be44fcd | 705 | error0: |
1da177e4 | 706 | disable_acpi(); |
d550d98d | 707 | return; |
1da177e4 LT |
708 | } |
709 | ||
4be44fcd | 710 | static int __init acpi_bus_init(void) |
1da177e4 | 711 | { |
4be44fcd LB |
712 | int result = 0; |
713 | acpi_status status = AE_OK; | |
714 | extern acpi_status acpi_os_initialize1(void); | |
1da177e4 | 715 | |
176f9c18 | 716 | acpi_os_initialize1(); |
1da177e4 | 717 | |
4be44fcd LB |
718 | status = |
719 | acpi_enable_subsystem(ACPI_NO_HARDWARE_INIT | ACPI_NO_ACPI_ENABLE); | |
1da177e4 | 720 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
721 | printk(KERN_ERR PREFIX |
722 | "Unable to start the ACPI Interpreter\n"); | |
1da177e4 LT |
723 | goto error1; |
724 | } | |
725 | ||
1da177e4 LT |
726 | /* |
727 | * ACPI 2.0 requires the EC driver to be loaded and work before | |
728 | * the EC device is found in the namespace (i.e. before acpi_initialize_objects() | |
729 | * is called). | |
730 | * | |
aafbcd16 | 731 | * This is accomplished by looking for the ECDT table, and getting |
1da177e4 LT |
732 | * the EC parameters out of that. |
733 | */ | |
734 | status = acpi_ec_ecdt_probe(); | |
735 | /* Ignore result. Not having an ECDT is not fatal. */ | |
1da177e4 LT |
736 | |
737 | status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); | |
738 | if (ACPI_FAILURE(status)) { | |
739 | printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); | |
740 | goto error1; | |
741 | } | |
742 | ||
455c8793 ZY |
743 | /* |
744 | * Maybe EC region is required at bus_scan/acpi_get_devices. So it | |
745 | * is necessary to enable it as early as possible. | |
746 | */ | |
747 | acpi_boot_ec_enable(); | |
748 | ||
1da177e4 LT |
749 | printk(KERN_INFO PREFIX "Interpreter enabled\n"); |
750 | ||
aafbcd16 AS |
751 | /* Initialize sleep structures */ |
752 | acpi_sleep_init(); | |
753 | ||
1da177e4 LT |
754 | /* |
755 | * Get the system interrupt model and evaluate \_PIC. | |
756 | */ | |
757 | result = acpi_bus_init_irq(); | |
758 | if (result) | |
759 | goto error1; | |
760 | ||
761 | /* | |
762 | * Register the for all standard device notifications. | |
763 | */ | |
4be44fcd LB |
764 | status = |
765 | acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, | |
766 | &acpi_bus_notify, NULL); | |
1da177e4 | 767 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
768 | printk(KERN_ERR PREFIX |
769 | "Unable to register for device notifications\n"); | |
1da177e4 LT |
770 | goto error1; |
771 | } | |
772 | ||
773 | /* | |
774 | * Create the top ACPI proc directory | |
775 | */ | |
776 | acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); | |
777 | ||
d550d98d | 778 | return 0; |
1da177e4 LT |
779 | |
780 | /* Mimic structured exception handling */ | |
4be44fcd | 781 | error1: |
1da177e4 | 782 | acpi_terminate(); |
d550d98d | 783 | return -ENODEV; |
1da177e4 LT |
784 | } |
785 | ||
99e0d2fc | 786 | struct kobject *acpi_kobj; |
1da177e4 | 787 | |
4be44fcd | 788 | static int __init acpi_init(void) |
1da177e4 | 789 | { |
4be44fcd | 790 | int result = 0; |
1da177e4 | 791 | |
1da177e4 | 792 | |
1da177e4 LT |
793 | if (acpi_disabled) { |
794 | printk(KERN_INFO PREFIX "Interpreter disabled.\n"); | |
d550d98d | 795 | return -ENODEV; |
1da177e4 LT |
796 | } |
797 | ||
f62ed9e3 | 798 | acpi_kobj = kobject_create_and_add("acpi", firmware_kobj); |
99e0d2fc | 799 | if (!acpi_kobj) { |
96b2dd1f | 800 | printk(KERN_WARNING "%s: kset create error\n", __func__); |
99e0d2fc GKH |
801 | acpi_kobj = NULL; |
802 | } | |
1da177e4 | 803 | |
0e46517d | 804 | init_acpi_device_notify(); |
1da177e4 LT |
805 | result = acpi_bus_init(); |
806 | ||
807 | if (!result) { | |
7752d5cf | 808 | pci_mmcfg_late_init(); |
9f9adecd LB |
809 | if (!(pm_flags & PM_APM)) |
810 | pm_flags |= PM_ACPI; | |
1da177e4 | 811 | else { |
4be44fcd LB |
812 | printk(KERN_INFO PREFIX |
813 | "APM is already active, exiting\n"); | |
1da177e4 LT |
814 | disable_acpi(); |
815 | result = -ENODEV; | |
816 | } | |
1da177e4 LT |
817 | } else |
818 | disable_acpi(); | |
81d0273d BH |
819 | |
820 | if (acpi_disabled) | |
821 | return result; | |
822 | ||
6415e12b ZY |
823 | /* |
824 | * If the laptop falls into the DMI check table, the power state check | |
825 | * will be disabled in the course of device power transistion. | |
826 | */ | |
827 | dmi_check_system(power_nocheck_dmi_table); | |
e747f274 BH |
828 | |
829 | acpi_scan_init(); | |
a5f820fe | 830 | acpi_ec_init(); |
44515374 | 831 | acpi_power_init(); |
141a0af3 | 832 | acpi_system_init(); |
84f810c3 | 833 | acpi_debug_init(); |
9cee43e0 | 834 | acpi_sleep_proc_init(); |
201b8c65 | 835 | acpi_wakeup_device_init(); |
d550d98d | 836 | return result; |
1da177e4 LT |
837 | } |
838 | ||
839 | subsys_initcall(acpi_init); |