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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> | |
41 | ||
1da177e4 | 42 | #define _COMPONENT ACPI_BUS_COMPONENT |
f52fd66d | 43 | ACPI_MODULE_NAME("bus"); |
1da177e4 | 44 | |
4be44fcd LB |
45 | struct acpi_device *acpi_root; |
46 | struct proc_dir_entry *acpi_root_dir; | |
1da177e4 LT |
47 | EXPORT_SYMBOL(acpi_root_dir); |
48 | ||
49 | #define STRUCT_TO_INT(s) (*((int*)&s)) | |
50 | ||
6415e12b ZY |
51 | static int set_power_nocheck(const struct dmi_system_id *id) |
52 | { | |
53 | printk(KERN_NOTICE PREFIX "%s detected - " | |
54 | "disable power check in power transistion\n", id->ident); | |
55 | acpi_power_nocheck = 1; | |
56 | return 0; | |
57 | } | |
58 | static struct dmi_system_id __cpuinitdata power_nocheck_dmi_table[] = { | |
59 | { | |
60 | set_power_nocheck, "HP Pavilion 05", { | |
61 | DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"), | |
62 | DMI_MATCH(DMI_SYS_VENDOR, "HP Pavilion 05"), | |
63 | DMI_MATCH(DMI_PRODUCT_VERSION, "2001211RE101GLEND") }, NULL}, | |
64 | {}, | |
65 | }; | |
66 | ||
67 | ||
1da177e4 LT |
68 | /* -------------------------------------------------------------------------- |
69 | Device Management | |
70 | -------------------------------------------------------------------------- */ | |
71 | ||
4be44fcd | 72 | int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device) |
1da177e4 | 73 | { |
4be44fcd | 74 | acpi_status status = AE_OK; |
1da177e4 | 75 | |
1da177e4 LT |
76 | |
77 | if (!device) | |
d550d98d | 78 | return -EINVAL; |
1da177e4 LT |
79 | |
80 | /* TBD: Support fixed-feature devices */ | |
81 | ||
4be44fcd | 82 | status = acpi_get_data(handle, acpi_bus_data_handler, (void **)device); |
1da177e4 | 83 | if (ACPI_FAILURE(status) || !*device) { |
9805cb76 LB |
84 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", |
85 | handle)); | |
d550d98d | 86 | return -ENODEV; |
1da177e4 LT |
87 | } |
88 | ||
d550d98d | 89 | return 0; |
1da177e4 | 90 | } |
4be44fcd | 91 | |
1da177e4 LT |
92 | EXPORT_SYMBOL(acpi_bus_get_device); |
93 | ||
4be44fcd | 94 | int acpi_bus_get_status(struct acpi_device *device) |
1da177e4 | 95 | { |
4be44fcd | 96 | acpi_status status = AE_OK; |
27663c58 | 97 | unsigned long long sta = 0; |
4be44fcd | 98 | |
1da177e4 LT |
99 | |
100 | if (!device) | |
d550d98d | 101 | return -EINVAL; |
1da177e4 LT |
102 | |
103 | /* | |
104 | * Evaluate _STA if present. | |
105 | */ | |
106 | if (device->flags.dynamic_status) { | |
4be44fcd LB |
107 | status = |
108 | acpi_evaluate_integer(device->handle, "_STA", NULL, &sta); | |
1da177e4 | 109 | if (ACPI_FAILURE(status)) |
d550d98d | 110 | return -ENODEV; |
4be44fcd | 111 | STRUCT_TO_INT(device->status) = (int)sta; |
1da177e4 LT |
112 | } |
113 | ||
114 | /* | |
39a0ad87 ZY |
115 | * According to ACPI spec some device can be present and functional |
116 | * even if the parent is not present but functional. | |
117 | * In such conditions the child device should not inherit the status | |
118 | * from the parent. | |
1da177e4 | 119 | */ |
1da177e4 | 120 | else |
0c0e8921 BH |
121 | STRUCT_TO_INT(device->status) = |
122 | ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | | |
123 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; | |
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))); | |
1da177e4 | 135 | |
d550d98d | 136 | return 0; |
1da177e4 | 137 | } |
1da177e4 | 138 | |
4be44fcd | 139 | EXPORT_SYMBOL(acpi_bus_get_status); |
1da177e4 | 140 | |
20733939 ZR |
141 | void acpi_bus_private_data_handler(acpi_handle handle, |
142 | u32 function, void *context) | |
143 | { | |
144 | return; | |
145 | } | |
146 | EXPORT_SYMBOL(acpi_bus_private_data_handler); | |
147 | ||
148 | int acpi_bus_get_private_data(acpi_handle handle, void **data) | |
149 | { | |
150 | acpi_status status = AE_OK; | |
151 | ||
152 | if (!*data) | |
153 | return -EINVAL; | |
154 | ||
155 | status = acpi_get_data(handle, acpi_bus_private_data_handler, data); | |
156 | if (ACPI_FAILURE(status) || !*data) { | |
157 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", | |
158 | handle)); | |
159 | return -ENODEV; | |
160 | } | |
161 | ||
162 | return 0; | |
163 | } | |
164 | EXPORT_SYMBOL(acpi_bus_get_private_data); | |
165 | ||
1da177e4 LT |
166 | /* -------------------------------------------------------------------------- |
167 | Power Management | |
168 | -------------------------------------------------------------------------- */ | |
169 | ||
4be44fcd | 170 | int acpi_bus_get_power(acpi_handle handle, int *state) |
1da177e4 | 171 | { |
4be44fcd LB |
172 | int result = 0; |
173 | acpi_status status = 0; | |
174 | struct acpi_device *device = NULL; | |
27663c58 | 175 | unsigned long long psc = 0; |
1da177e4 | 176 | |
1da177e4 LT |
177 | |
178 | result = acpi_bus_get_device(handle, &device); | |
179 | if (result) | |
d550d98d | 180 | return result; |
1da177e4 LT |
181 | |
182 | *state = ACPI_STATE_UNKNOWN; | |
183 | ||
184 | if (!device->flags.power_manageable) { | |
185 | /* TBD: Non-recursive algorithm for walking up hierarchy */ | |
186 | if (device->parent) | |
187 | *state = device->parent->power.state; | |
188 | else | |
189 | *state = ACPI_STATE_D0; | |
4be44fcd | 190 | } else { |
1da177e4 | 191 | /* |
aafbcd16 | 192 | * Get the device's power state either directly (via _PSC) or |
1da177e4 LT |
193 | * indirectly (via power resources). |
194 | */ | |
195 | if (device->power.flags.explicit_get) { | |
4be44fcd LB |
196 | status = acpi_evaluate_integer(device->handle, "_PSC", |
197 | NULL, &psc); | |
1da177e4 | 198 | if (ACPI_FAILURE(status)) |
d550d98d | 199 | return -ENODEV; |
4be44fcd LB |
200 | device->power.state = (int)psc; |
201 | } else if (device->power.flags.power_resources) { | |
1da177e4 LT |
202 | result = acpi_power_get_inferred_state(device); |
203 | if (result) | |
d550d98d | 204 | return result; |
1da177e4 LT |
205 | } |
206 | ||
207 | *state = device->power.state; | |
208 | } | |
209 | ||
210 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] power state is D%d\n", | |
4be44fcd | 211 | device->pnp.bus_id, device->power.state)); |
1da177e4 | 212 | |
d550d98d | 213 | return 0; |
1da177e4 | 214 | } |
1da177e4 | 215 | |
4be44fcd | 216 | EXPORT_SYMBOL(acpi_bus_get_power); |
1da177e4 | 217 | |
4be44fcd | 218 | int acpi_bus_set_power(acpi_handle handle, int state) |
1da177e4 | 219 | { |
4be44fcd LB |
220 | int result = 0; |
221 | acpi_status status = AE_OK; | |
222 | struct acpi_device *device = NULL; | |
223 | char object_name[5] = { '_', 'P', 'S', '0' + state, '\0' }; | |
1da177e4 | 224 | |
1da177e4 LT |
225 | |
226 | result = acpi_bus_get_device(handle, &device); | |
227 | if (result) | |
d550d98d | 228 | return result; |
1da177e4 LT |
229 | |
230 | if ((state < ACPI_STATE_D0) || (state > ACPI_STATE_D3)) | |
d550d98d | 231 | return -EINVAL; |
1da177e4 LT |
232 | |
233 | /* Make sure this is a valid target state */ | |
234 | ||
235 | if (!device->flags.power_manageable) { | |
9805cb76 | 236 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device `[%s]' is not power manageable\n", |
19c38de8 | 237 | kobject_name(&device->dev.kobj))); |
d550d98d | 238 | return -ENODEV; |
1da177e4 | 239 | } |
b913100d | 240 | /* |
c35923bc | 241 | * Get device's current power state |
b913100d | 242 | */ |
f5adfaa3 ZY |
243 | if (!acpi_power_nocheck) { |
244 | /* | |
245 | * Maybe the incorrect power state is returned on the bogus | |
246 | * bios, which is different with the real power state. | |
247 | * For example: the bios returns D0 state and the real power | |
248 | * state is D3. OS expects to set the device to D0 state. In | |
249 | * such case if OS uses the power state returned by the BIOS, | |
250 | * the device can't be transisted to the correct power state. | |
251 | * So if the acpi_power_nocheck is set, it is unnecessary to | |
252 | * get the power state by calling acpi_bus_get_power. | |
253 | */ | |
254 | acpi_bus_get_power(device->handle, &device->power.state); | |
255 | } | |
ec68373c | 256 | if ((state == device->power.state) && !device->flags.force_power_state) { |
b1028c54 KK |
257 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n", |
258 | state)); | |
259 | return 0; | |
1da177e4 | 260 | } |
b1028c54 | 261 | |
1da177e4 | 262 | if (!device->power.states[state].flags.valid) { |
cece9296 | 263 | printk(KERN_WARNING PREFIX "Device does not support D%d\n", state); |
d550d98d | 264 | return -ENODEV; |
1da177e4 LT |
265 | } |
266 | if (device->parent && (state < device->parent->power.state)) { | |
cece9296 | 267 | printk(KERN_WARNING PREFIX |
a6fc6720 | 268 | "Cannot set device to a higher-powered" |
cece9296 | 269 | " state than parent\n"); |
d550d98d | 270 | return -ENODEV; |
1da177e4 LT |
271 | } |
272 | ||
273 | /* | |
274 | * Transition Power | |
275 | * ---------------- | |
276 | * On transitions to a high-powered state we first apply power (via | |
277 | * power resources) then evalute _PSx. Conversly for transitions to | |
278 | * a lower-powered state. | |
b913100d | 279 | */ |
1da177e4 LT |
280 | if (state < device->power.state) { |
281 | if (device->power.flags.power_resources) { | |
282 | result = acpi_power_transition(device, state); | |
283 | if (result) | |
284 | goto end; | |
285 | } | |
286 | if (device->power.states[state].flags.explicit_set) { | |
4be44fcd LB |
287 | status = acpi_evaluate_object(device->handle, |
288 | object_name, NULL, NULL); | |
1da177e4 LT |
289 | if (ACPI_FAILURE(status)) { |
290 | result = -ENODEV; | |
291 | goto end; | |
292 | } | |
293 | } | |
4be44fcd | 294 | } else { |
1da177e4 | 295 | if (device->power.states[state].flags.explicit_set) { |
4be44fcd LB |
296 | status = acpi_evaluate_object(device->handle, |
297 | object_name, NULL, NULL); | |
1da177e4 LT |
298 | if (ACPI_FAILURE(status)) { |
299 | result = -ENODEV; | |
300 | goto end; | |
301 | } | |
302 | } | |
303 | if (device->power.flags.power_resources) { | |
304 | result = acpi_power_transition(device, state); | |
305 | if (result) | |
306 | goto end; | |
307 | } | |
308 | } | |
309 | ||
4be44fcd | 310 | end: |
1da177e4 | 311 | if (result) |
cece9296 LB |
312 | printk(KERN_WARNING PREFIX |
313 | "Transitioning device [%s] to D%d\n", | |
314 | device->pnp.bus_id, state); | |
5e32132b SL |
315 | else { |
316 | device->power.state = state; | |
4be44fcd LB |
317 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
318 | "Device [%s] transitioned to D%d\n", | |
319 | device->pnp.bus_id, state)); | |
5e32132b | 320 | } |
1da177e4 | 321 | |
d550d98d | 322 | return result; |
1da177e4 | 323 | } |
1da177e4 | 324 | |
4be44fcd | 325 | EXPORT_SYMBOL(acpi_bus_set_power); |
1da177e4 | 326 | |
3737b2b1 RW |
327 | bool acpi_bus_power_manageable(acpi_handle handle) |
328 | { | |
329 | struct acpi_device *device; | |
330 | int result; | |
331 | ||
332 | result = acpi_bus_get_device(handle, &device); | |
333 | return result ? false : device->flags.power_manageable; | |
334 | } | |
335 | ||
336 | EXPORT_SYMBOL(acpi_bus_power_manageable); | |
337 | ||
eb9d0fe4 RW |
338 | bool acpi_bus_can_wakeup(acpi_handle handle) |
339 | { | |
340 | struct acpi_device *device; | |
341 | int result; | |
342 | ||
343 | result = acpi_bus_get_device(handle, &device); | |
344 | return result ? false : device->wakeup.flags.valid; | |
345 | } | |
346 | ||
347 | EXPORT_SYMBOL(acpi_bus_can_wakeup); | |
348 | ||
1da177e4 LT |
349 | /* -------------------------------------------------------------------------- |
350 | Event Management | |
351 | -------------------------------------------------------------------------- */ | |
352 | ||
14e04fb3 | 353 | #ifdef CONFIG_ACPI_PROC_EVENT |
1da177e4 LT |
354 | static DEFINE_SPINLOCK(acpi_bus_event_lock); |
355 | ||
356 | LIST_HEAD(acpi_bus_event_list); | |
357 | DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue); | |
358 | ||
4be44fcd | 359 | extern int event_is_open; |
1da177e4 | 360 | |
8db85d4c | 361 | int acpi_bus_generate_proc_event4(const char *device_class, const char *bus_id, u8 type, int data) |
1da177e4 | 362 | { |
8db85d4c | 363 | struct acpi_bus_event *event; |
4be44fcd | 364 | unsigned long flags = 0; |
1da177e4 | 365 | |
1da177e4 LT |
366 | /* drop event on the floor if no one's listening */ |
367 | if (!event_is_open) | |
d550d98d | 368 | return 0; |
1da177e4 LT |
369 | |
370 | event = kmalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC); | |
371 | if (!event) | |
d550d98d | 372 | return -ENOMEM; |
1da177e4 | 373 | |
8db85d4c AS |
374 | strcpy(event->device_class, device_class); |
375 | strcpy(event->bus_id, bus_id); | |
1da177e4 LT |
376 | event->type = type; |
377 | event->data = data; | |
378 | ||
379 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
380 | list_add_tail(&event->node, &acpi_bus_event_list); | |
381 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); | |
382 | ||
383 | wake_up_interruptible(&acpi_bus_event_queue); | |
384 | ||
d550d98d | 385 | return 0; |
8db85d4c AS |
386 | |
387 | } | |
388 | ||
389 | EXPORT_SYMBOL_GPL(acpi_bus_generate_proc_event4); | |
390 | ||
391 | int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data) | |
392 | { | |
393 | if (!device) | |
394 | return -EINVAL; | |
395 | return acpi_bus_generate_proc_event4(device->pnp.device_class, | |
396 | device->pnp.bus_id, type, data); | |
1da177e4 | 397 | } |
4be44fcd | 398 | |
14e04fb3 | 399 | EXPORT_SYMBOL(acpi_bus_generate_proc_event); |
1da177e4 | 400 | |
4be44fcd | 401 | int acpi_bus_receive_event(struct acpi_bus_event *event) |
1da177e4 | 402 | { |
4be44fcd LB |
403 | unsigned long flags = 0; |
404 | struct acpi_bus_event *entry = NULL; | |
1da177e4 LT |
405 | |
406 | DECLARE_WAITQUEUE(wait, current); | |
407 | ||
1da177e4 LT |
408 | |
409 | if (!event) | |
d550d98d | 410 | return -EINVAL; |
1da177e4 LT |
411 | |
412 | if (list_empty(&acpi_bus_event_list)) { | |
413 | ||
414 | set_current_state(TASK_INTERRUPTIBLE); | |
415 | add_wait_queue(&acpi_bus_event_queue, &wait); | |
416 | ||
417 | if (list_empty(&acpi_bus_event_list)) | |
418 | schedule(); | |
419 | ||
420 | remove_wait_queue(&acpi_bus_event_queue, &wait); | |
421 | set_current_state(TASK_RUNNING); | |
422 | ||
423 | if (signal_pending(current)) | |
d550d98d | 424 | return -ERESTARTSYS; |
1da177e4 LT |
425 | } |
426 | ||
427 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
f0a37e00 CE |
428 | if (!list_empty(&acpi_bus_event_list)) { |
429 | entry = list_entry(acpi_bus_event_list.next, | |
430 | struct acpi_bus_event, node); | |
1da177e4 | 431 | list_del(&entry->node); |
f0a37e00 | 432 | } |
1da177e4 LT |
433 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); |
434 | ||
435 | if (!entry) | |
d550d98d | 436 | return -ENODEV; |
1da177e4 LT |
437 | |
438 | memcpy(event, entry, sizeof(struct acpi_bus_event)); | |
439 | ||
440 | kfree(entry); | |
441 | ||
d550d98d | 442 | return 0; |
1da177e4 | 443 | } |
1da177e4 | 444 | |
14e04fb3 | 445 | #endif /* CONFIG_ACPI_PROC_EVENT */ |
1da177e4 LT |
446 | |
447 | /* -------------------------------------------------------------------------- | |
448 | Notification Handling | |
449 | -------------------------------------------------------------------------- */ | |
450 | ||
451 | static int | |
4be44fcd | 452 | acpi_bus_check_device(struct acpi_device *device, int *status_changed) |
1da177e4 | 453 | { |
4be44fcd | 454 | acpi_status status = 0; |
1da177e4 LT |
455 | struct acpi_device_status old_status; |
456 | ||
1da177e4 LT |
457 | |
458 | if (!device) | |
d550d98d | 459 | return -EINVAL; |
1da177e4 LT |
460 | |
461 | if (status_changed) | |
462 | *status_changed = 0; | |
463 | ||
464 | old_status = device->status; | |
465 | ||
466 | /* | |
467 | * Make sure this device's parent is present before we go about | |
468 | * messing with the device. | |
469 | */ | |
470 | if (device->parent && !device->parent->status.present) { | |
471 | device->status = device->parent->status; | |
472 | if (STRUCT_TO_INT(old_status) != STRUCT_TO_INT(device->status)) { | |
473 | if (status_changed) | |
474 | *status_changed = 1; | |
475 | } | |
d550d98d | 476 | return 0; |
1da177e4 LT |
477 | } |
478 | ||
479 | status = acpi_bus_get_status(device); | |
480 | if (ACPI_FAILURE(status)) | |
d550d98d | 481 | return -ENODEV; |
1da177e4 LT |
482 | |
483 | if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status)) | |
d550d98d | 484 | return 0; |
1da177e4 LT |
485 | |
486 | if (status_changed) | |
487 | *status_changed = 1; | |
4be44fcd | 488 | |
1da177e4 LT |
489 | /* |
490 | * Device Insertion/Removal | |
491 | */ | |
492 | if ((device->status.present) && !(old_status.present)) { | |
493 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n")); | |
494 | /* TBD: Handle device insertion */ | |
4be44fcd | 495 | } else if (!(device->status.present) && (old_status.present)) { |
1da177e4 LT |
496 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n")); |
497 | /* TBD: Handle device removal */ | |
498 | } | |
499 | ||
d550d98d | 500 | return 0; |
1da177e4 LT |
501 | } |
502 | ||
4be44fcd | 503 | static int acpi_bus_check_scope(struct acpi_device *device) |
1da177e4 | 504 | { |
4be44fcd LB |
505 | int result = 0; |
506 | int status_changed = 0; | |
1da177e4 | 507 | |
1da177e4 LT |
508 | |
509 | if (!device) | |
d550d98d | 510 | return -EINVAL; |
1da177e4 LT |
511 | |
512 | /* Status Change? */ | |
513 | result = acpi_bus_check_device(device, &status_changed); | |
514 | if (result) | |
d550d98d | 515 | return result; |
1da177e4 LT |
516 | |
517 | if (!status_changed) | |
d550d98d | 518 | return 0; |
1da177e4 LT |
519 | |
520 | /* | |
521 | * TBD: Enumerate child devices within this device's scope and | |
522 | * run acpi_bus_check_device()'s on them. | |
523 | */ | |
524 | ||
d550d98d | 525 | return 0; |
1da177e4 LT |
526 | } |
527 | ||
6bd00a61 SL |
528 | static BLOCKING_NOTIFIER_HEAD(acpi_bus_notify_list); |
529 | int register_acpi_bus_notifier(struct notifier_block *nb) | |
530 | { | |
531 | return blocking_notifier_chain_register(&acpi_bus_notify_list, nb); | |
532 | } | |
533 | EXPORT_SYMBOL_GPL(register_acpi_bus_notifier); | |
534 | ||
535 | void unregister_acpi_bus_notifier(struct notifier_block *nb) | |
536 | { | |
537 | blocking_notifier_chain_unregister(&acpi_bus_notify_list, nb); | |
538 | } | |
539 | EXPORT_SYMBOL_GPL(unregister_acpi_bus_notifier); | |
540 | ||
1da177e4 LT |
541 | /** |
542 | * acpi_bus_notify | |
543 | * --------------- | |
544 | * Callback for all 'system-level' device notifications (values 0x00-0x7F). | |
545 | */ | |
4be44fcd | 546 | static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) |
1da177e4 | 547 | { |
4be44fcd LB |
548 | int result = 0; |
549 | struct acpi_device *device = NULL; | |
1da177e4 | 550 | |
6bd00a61 SL |
551 | blocking_notifier_call_chain(&acpi_bus_notify_list, |
552 | type, (void *)handle); | |
1da177e4 LT |
553 | |
554 | if (acpi_bus_get_device(handle, &device)) | |
d550d98d | 555 | return; |
1da177e4 LT |
556 | |
557 | switch (type) { | |
558 | ||
559 | case ACPI_NOTIFY_BUS_CHECK: | |
4be44fcd LB |
560 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
561 | "Received BUS CHECK notification for device [%s]\n", | |
562 | device->pnp.bus_id)); | |
1da177e4 | 563 | result = acpi_bus_check_scope(device); |
aafbcd16 | 564 | /* |
1da177e4 | 565 | * TBD: We'll need to outsource certain events to non-ACPI |
4be44fcd | 566 | * drivers via the device manager (device.c). |
1da177e4 LT |
567 | */ |
568 | break; | |
569 | ||
570 | case ACPI_NOTIFY_DEVICE_CHECK: | |
4be44fcd LB |
571 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
572 | "Received DEVICE CHECK notification for device [%s]\n", | |
573 | device->pnp.bus_id)); | |
1da177e4 | 574 | result = acpi_bus_check_device(device, NULL); |
aafbcd16 | 575 | /* |
1da177e4 | 576 | * TBD: We'll need to outsource certain events to non-ACPI |
4be44fcd | 577 | * drivers via the device manager (device.c). |
1da177e4 LT |
578 | */ |
579 | break; | |
580 | ||
581 | case ACPI_NOTIFY_DEVICE_WAKE: | |
4be44fcd LB |
582 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
583 | "Received DEVICE WAKE notification for device [%s]\n", | |
584 | device->pnp.bus_id)); | |
1da177e4 LT |
585 | /* TBD */ |
586 | break; | |
587 | ||
588 | case ACPI_NOTIFY_EJECT_REQUEST: | |
4be44fcd LB |
589 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
590 | "Received EJECT REQUEST notification for device [%s]\n", | |
591 | device->pnp.bus_id)); | |
1da177e4 LT |
592 | /* TBD */ |
593 | break; | |
594 | ||
595 | case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: | |
4be44fcd LB |
596 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
597 | "Received DEVICE CHECK LIGHT notification for device [%s]\n", | |
598 | device->pnp.bus_id)); | |
1da177e4 LT |
599 | /* TBD: Exactly what does 'light' mean? */ |
600 | break; | |
601 | ||
602 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
4be44fcd LB |
603 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
604 | "Received FREQUENCY MISMATCH notification for device [%s]\n", | |
605 | device->pnp.bus_id)); | |
1da177e4 LT |
606 | /* TBD */ |
607 | break; | |
608 | ||
609 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
4be44fcd LB |
610 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
611 | "Received BUS MODE MISMATCH notification for device [%s]\n", | |
612 | device->pnp.bus_id)); | |
1da177e4 LT |
613 | /* TBD */ |
614 | break; | |
615 | ||
616 | case ACPI_NOTIFY_POWER_FAULT: | |
4be44fcd LB |
617 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
618 | "Received POWER FAULT notification for device [%s]\n", | |
619 | device->pnp.bus_id)); | |
1da177e4 LT |
620 | /* TBD */ |
621 | break; | |
622 | ||
623 | default: | |
4be44fcd LB |
624 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
625 | "Received unknown/unsupported notification [%08x]\n", | |
626 | type)); | |
1da177e4 LT |
627 | break; |
628 | } | |
629 | ||
d550d98d | 630 | return; |
1da177e4 LT |
631 | } |
632 | ||
633 | /* -------------------------------------------------------------------------- | |
634 | Initialization/Cleanup | |
635 | -------------------------------------------------------------------------- */ | |
636 | ||
4be44fcd | 637 | static int __init acpi_bus_init_irq(void) |
1da177e4 | 638 | { |
4be44fcd LB |
639 | acpi_status status = AE_OK; |
640 | union acpi_object arg = { ACPI_TYPE_INTEGER }; | |
641 | struct acpi_object_list arg_list = { 1, &arg }; | |
642 | char *message = NULL; | |
1da177e4 | 643 | |
1da177e4 | 644 | |
aafbcd16 | 645 | /* |
1da177e4 LT |
646 | * Let the system know what interrupt model we are using by |
647 | * evaluating the \_PIC object, if exists. | |
648 | */ | |
649 | ||
650 | switch (acpi_irq_model) { | |
651 | case ACPI_IRQ_MODEL_PIC: | |
652 | message = "PIC"; | |
653 | break; | |
654 | case ACPI_IRQ_MODEL_IOAPIC: | |
655 | message = "IOAPIC"; | |
656 | break; | |
657 | case ACPI_IRQ_MODEL_IOSAPIC: | |
658 | message = "IOSAPIC"; | |
659 | break; | |
3948ec94 JK |
660 | case ACPI_IRQ_MODEL_PLATFORM: |
661 | message = "platform specific model"; | |
662 | break; | |
1da177e4 LT |
663 | default: |
664 | printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n"); | |
d550d98d | 665 | return -ENODEV; |
1da177e4 LT |
666 | } |
667 | ||
668 | printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message); | |
669 | ||
670 | arg.integer.value = acpi_irq_model; | |
671 | ||
672 | status = acpi_evaluate_object(NULL, "\\_PIC", &arg_list, NULL); | |
673 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { | |
a6fc6720 | 674 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC")); |
d550d98d | 675 | return -ENODEV; |
1da177e4 LT |
676 | } |
677 | ||
d550d98d | 678 | return 0; |
1da177e4 LT |
679 | } |
680 | ||
67a119f9 | 681 | u8 acpi_gbl_permanent_mmap; |
ad71860a AS |
682 | |
683 | ||
4be44fcd | 684 | void __init acpi_early_init(void) |
1da177e4 | 685 | { |
4be44fcd | 686 | acpi_status status = AE_OK; |
1da177e4 LT |
687 | |
688 | if (acpi_disabled) | |
d550d98d | 689 | return; |
1da177e4 | 690 | |
61686124 BM |
691 | printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION); |
692 | ||
1da177e4 LT |
693 | /* enable workarounds, unless strict ACPI spec. compliance */ |
694 | if (!acpi_strict) | |
695 | acpi_gbl_enable_interpreter_slack = TRUE; | |
696 | ||
ad71860a AS |
697 | acpi_gbl_permanent_mmap = 1; |
698 | ||
699 | status = acpi_reallocate_root_table(); | |
700 | if (ACPI_FAILURE(status)) { | |
701 | printk(KERN_ERR PREFIX | |
702 | "Unable to reallocate ACPI tables\n"); | |
703 | goto error0; | |
704 | } | |
705 | ||
1da177e4 LT |
706 | status = acpi_initialize_subsystem(); |
707 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
708 | printk(KERN_ERR PREFIX |
709 | "Unable to initialize the ACPI Interpreter\n"); | |
1da177e4 LT |
710 | goto error0; |
711 | } | |
712 | ||
713 | status = acpi_load_tables(); | |
714 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
715 | printk(KERN_ERR PREFIX |
716 | "Unable to load the System Description Tables\n"); | |
1da177e4 LT |
717 | goto error0; |
718 | } | |
719 | ||
1da177e4 LT |
720 | #ifdef CONFIG_X86 |
721 | if (!acpi_ioapic) { | |
1da177e4 | 722 | /* compatible (0) means level (3) */ |
5f3b1a8b AS |
723 | if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) { |
724 | acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK; | |
725 | acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL; | |
726 | } | |
1da177e4 | 727 | /* Set PIC-mode SCI trigger type */ |
cee324b1 | 728 | acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt, |
5f3b1a8b | 729 | (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2); |
1da177e4 | 730 | } else { |
1da177e4 | 731 | /* |
cee324b1 | 732 | * now that acpi_gbl_FADT is initialized, |
1da177e4 LT |
733 | * update it with result from INT_SRC_OVR parsing |
734 | */ | |
cee324b1 | 735 | acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi; |
1da177e4 LT |
736 | } |
737 | #endif | |
738 | ||
4be44fcd LB |
739 | status = |
740 | acpi_enable_subsystem(~ | |
741 | (ACPI_NO_HARDWARE_INIT | | |
742 | ACPI_NO_ACPI_ENABLE)); | |
1da177e4 LT |
743 | if (ACPI_FAILURE(status)) { |
744 | printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); | |
745 | goto error0; | |
746 | } | |
747 | ||
d550d98d | 748 | return; |
1da177e4 | 749 | |
4be44fcd | 750 | error0: |
1da177e4 | 751 | disable_acpi(); |
d550d98d | 752 | return; |
1da177e4 LT |
753 | } |
754 | ||
4be44fcd | 755 | static int __init acpi_bus_init(void) |
1da177e4 | 756 | { |
4be44fcd LB |
757 | int result = 0; |
758 | acpi_status status = AE_OK; | |
759 | extern acpi_status acpi_os_initialize1(void); | |
1da177e4 | 760 | |
1da177e4 LT |
761 | |
762 | status = acpi_os_initialize1(); | |
763 | ||
4be44fcd LB |
764 | status = |
765 | acpi_enable_subsystem(ACPI_NO_HARDWARE_INIT | ACPI_NO_ACPI_ENABLE); | |
1da177e4 | 766 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
767 | printk(KERN_ERR PREFIX |
768 | "Unable to start the ACPI Interpreter\n"); | |
1da177e4 LT |
769 | goto error1; |
770 | } | |
771 | ||
772 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
773 | printk(KERN_ERR PREFIX |
774 | "Unable to initialize ACPI OS objects\n"); | |
1da177e4 LT |
775 | goto error1; |
776 | } | |
8950d89a | 777 | |
1da177e4 LT |
778 | /* |
779 | * ACPI 2.0 requires the EC driver to be loaded and work before | |
780 | * the EC device is found in the namespace (i.e. before acpi_initialize_objects() | |
781 | * is called). | |
782 | * | |
aafbcd16 | 783 | * This is accomplished by looking for the ECDT table, and getting |
1da177e4 LT |
784 | * the EC parameters out of that. |
785 | */ | |
786 | status = acpi_ec_ecdt_probe(); | |
787 | /* Ignore result. Not having an ECDT is not fatal. */ | |
1da177e4 LT |
788 | |
789 | status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); | |
790 | if (ACPI_FAILURE(status)) { | |
791 | printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); | |
792 | goto error1; | |
793 | } | |
794 | ||
455c8793 ZY |
795 | /* |
796 | * Maybe EC region is required at bus_scan/acpi_get_devices. So it | |
797 | * is necessary to enable it as early as possible. | |
798 | */ | |
799 | acpi_boot_ec_enable(); | |
800 | ||
1da177e4 LT |
801 | printk(KERN_INFO PREFIX "Interpreter enabled\n"); |
802 | ||
aafbcd16 AS |
803 | /* Initialize sleep structures */ |
804 | acpi_sleep_init(); | |
805 | ||
1da177e4 LT |
806 | /* |
807 | * Get the system interrupt model and evaluate \_PIC. | |
808 | */ | |
809 | result = acpi_bus_init_irq(); | |
810 | if (result) | |
811 | goto error1; | |
812 | ||
813 | /* | |
814 | * Register the for all standard device notifications. | |
815 | */ | |
4be44fcd LB |
816 | status = |
817 | acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, | |
818 | &acpi_bus_notify, NULL); | |
1da177e4 | 819 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
820 | printk(KERN_ERR PREFIX |
821 | "Unable to register for device notifications\n"); | |
1da177e4 LT |
822 | goto error1; |
823 | } | |
824 | ||
825 | /* | |
826 | * Create the top ACPI proc directory | |
827 | */ | |
828 | acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); | |
829 | ||
d550d98d | 830 | return 0; |
1da177e4 LT |
831 | |
832 | /* Mimic structured exception handling */ | |
4be44fcd | 833 | error1: |
1da177e4 | 834 | acpi_terminate(); |
d550d98d | 835 | return -ENODEV; |
1da177e4 LT |
836 | } |
837 | ||
99e0d2fc | 838 | struct kobject *acpi_kobj; |
1da177e4 | 839 | |
4be44fcd | 840 | static int __init acpi_init(void) |
1da177e4 | 841 | { |
4be44fcd | 842 | int result = 0; |
1da177e4 | 843 | |
1da177e4 | 844 | |
1da177e4 LT |
845 | if (acpi_disabled) { |
846 | printk(KERN_INFO PREFIX "Interpreter disabled.\n"); | |
d550d98d | 847 | return -ENODEV; |
1da177e4 LT |
848 | } |
849 | ||
f62ed9e3 | 850 | acpi_kobj = kobject_create_and_add("acpi", firmware_kobj); |
99e0d2fc | 851 | if (!acpi_kobj) { |
96b2dd1f | 852 | printk(KERN_WARNING "%s: kset create error\n", __func__); |
99e0d2fc GKH |
853 | acpi_kobj = NULL; |
854 | } | |
1da177e4 LT |
855 | |
856 | result = acpi_bus_init(); | |
857 | ||
858 | if (!result) { | |
7752d5cf | 859 | pci_mmcfg_late_init(); |
9f9adecd LB |
860 | if (!(pm_flags & PM_APM)) |
861 | pm_flags |= PM_ACPI; | |
1da177e4 | 862 | else { |
4be44fcd LB |
863 | printk(KERN_INFO PREFIX |
864 | "APM is already active, exiting\n"); | |
1da177e4 LT |
865 | disable_acpi(); |
866 | result = -ENODEV; | |
867 | } | |
1da177e4 LT |
868 | } else |
869 | disable_acpi(); | |
6415e12b ZY |
870 | /* |
871 | * If the laptop falls into the DMI check table, the power state check | |
872 | * will be disabled in the course of device power transistion. | |
873 | */ | |
874 | dmi_check_system(power_nocheck_dmi_table); | |
d550d98d | 875 | return result; |
1da177e4 LT |
876 | } |
877 | ||
878 | subsys_initcall(acpi_init); |