Commit | Line | Data |
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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> |
5a0e3ad6 | 35 | #include <linux/slab.h> |
1da177e4 LT |
36 | #ifdef CONFIG_X86 |
37 | #include <asm/mpspec.h> | |
38 | #endif | |
7752d5cf | 39 | #include <linux/pci.h> |
1da177e4 LT |
40 | #include <acpi/acpi_bus.h> |
41 | #include <acpi/acpi_drivers.h> | |
eb27cae8 | 42 | #include <linux/dmi.h> |
1da177e4 | 43 | |
e60cc7a6 BH |
44 | #include "internal.h" |
45 | ||
1da177e4 | 46 | #define _COMPONENT ACPI_BUS_COMPONENT |
f52fd66d | 47 | ACPI_MODULE_NAME("bus"); |
1da177e4 | 48 | |
4be44fcd LB |
49 | struct acpi_device *acpi_root; |
50 | struct proc_dir_entry *acpi_root_dir; | |
1da177e4 LT |
51 | EXPORT_SYMBOL(acpi_root_dir); |
52 | ||
53 | #define STRUCT_TO_INT(s) (*((int*)&s)) | |
54 | ||
6415e12b | 55 | |
cce4f632 | 56 | #ifdef CONFIG_X86 |
aa2110cb LM |
57 | static int set_copy_dsdt(const struct dmi_system_id *id) |
58 | { | |
59 | printk(KERN_NOTICE "%s detected - " | |
60 | "force copy of DSDT to local memory\n", id->ident); | |
61 | acpi_gbl_copy_dsdt_locally = 1; | |
62 | return 0; | |
63 | } | |
64 | ||
65 | static struct dmi_system_id dsdt_dmi_table[] __initdata = { | |
66 | /* | |
100cf877 | 67 | * Invoke DSDT corruption work-around on all Toshiba Satellite. |
aa2110cb LM |
68 | * https://bugzilla.kernel.org/show_bug.cgi?id=14679 |
69 | */ | |
70 | { | |
71 | .callback = set_copy_dsdt, | |
100cf877 | 72 | .ident = "TOSHIBA Satellite", |
aa2110cb LM |
73 | .matches = { |
74 | DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), | |
100cf877 | 75 | DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"), |
aa2110cb | 76 | }, |
cce4f632 LM |
77 | }, |
78 | {} | |
aa2110cb | 79 | }; |
cce4f632 LM |
80 | #else |
81 | static struct dmi_system_id dsdt_dmi_table[] __initdata = { | |
82 | {} | |
83 | }; | |
84 | #endif | |
aa2110cb | 85 | |
1da177e4 LT |
86 | /* -------------------------------------------------------------------------- |
87 | Device Management | |
88 | -------------------------------------------------------------------------- */ | |
89 | ||
4be44fcd | 90 | int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device) |
1da177e4 | 91 | { |
4be44fcd | 92 | acpi_status status = AE_OK; |
1da177e4 | 93 | |
1da177e4 LT |
94 | |
95 | if (!device) | |
d550d98d | 96 | return -EINVAL; |
1da177e4 LT |
97 | |
98 | /* TBD: Support fixed-feature devices */ | |
99 | ||
4be44fcd | 100 | status = acpi_get_data(handle, acpi_bus_data_handler, (void **)device); |
1da177e4 | 101 | if (ACPI_FAILURE(status) || !*device) { |
9805cb76 LB |
102 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", |
103 | handle)); | |
d550d98d | 104 | return -ENODEV; |
1da177e4 LT |
105 | } |
106 | ||
d550d98d | 107 | return 0; |
1da177e4 | 108 | } |
4be44fcd | 109 | |
1da177e4 LT |
110 | EXPORT_SYMBOL(acpi_bus_get_device); |
111 | ||
402ac536 BH |
112 | acpi_status acpi_bus_get_status_handle(acpi_handle handle, |
113 | unsigned long long *sta) | |
1da177e4 | 114 | { |
402ac536 | 115 | acpi_status status; |
4be44fcd | 116 | |
402ac536 BH |
117 | status = acpi_evaluate_integer(handle, "_STA", NULL, sta); |
118 | if (ACPI_SUCCESS(status)) | |
119 | return AE_OK; | |
1da177e4 | 120 | |
402ac536 BH |
121 | if (status == AE_NOT_FOUND) { |
122 | *sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | | |
123 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; | |
124 | return AE_OK; | |
1da177e4 | 125 | } |
402ac536 BH |
126 | return status; |
127 | } | |
1da177e4 | 128 | |
402ac536 BH |
129 | int acpi_bus_get_status(struct acpi_device *device) |
130 | { | |
131 | acpi_status status; | |
132 | unsigned long long sta; | |
133 | ||
134 | status = acpi_bus_get_status_handle(device->handle, &sta); | |
135 | if (ACPI_FAILURE(status)) | |
136 | return -ENODEV; | |
137 | ||
138 | STRUCT_TO_INT(device->status) = (int) sta; | |
1da177e4 LT |
139 | |
140 | if (device->status.functional && !device->status.present) { | |
39a0ad87 ZY |
141 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: " |
142 | "functional but not present;\n", | |
143 | device->pnp.bus_id, | |
144 | (u32) STRUCT_TO_INT(device->status))); | |
1da177e4 LT |
145 | } |
146 | ||
4be44fcd LB |
147 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n", |
148 | device->pnp.bus_id, | |
149 | (u32) STRUCT_TO_INT(device->status))); | |
d550d98d | 150 | return 0; |
1da177e4 | 151 | } |
4be44fcd | 152 | EXPORT_SYMBOL(acpi_bus_get_status); |
1da177e4 | 153 | |
20733939 | 154 | void acpi_bus_private_data_handler(acpi_handle handle, |
8e4319c4 | 155 | void *context) |
20733939 ZR |
156 | { |
157 | return; | |
158 | } | |
159 | EXPORT_SYMBOL(acpi_bus_private_data_handler); | |
160 | ||
161 | int acpi_bus_get_private_data(acpi_handle handle, void **data) | |
162 | { | |
163 | acpi_status status = AE_OK; | |
164 | ||
165 | if (!*data) | |
166 | return -EINVAL; | |
167 | ||
168 | status = acpi_get_data(handle, acpi_bus_private_data_handler, data); | |
169 | if (ACPI_FAILURE(status) || !*data) { | |
170 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", | |
171 | handle)); | |
172 | return -ENODEV; | |
173 | } | |
174 | ||
175 | return 0; | |
176 | } | |
177 | EXPORT_SYMBOL(acpi_bus_get_private_data); | |
178 | ||
1da177e4 LT |
179 | /* -------------------------------------------------------------------------- |
180 | Power Management | |
181 | -------------------------------------------------------------------------- */ | |
182 | ||
5e6d4fe4 | 183 | static int __acpi_bus_get_power(struct acpi_device *device, int *state) |
1da177e4 | 184 | { |
4be44fcd LB |
185 | int result = 0; |
186 | acpi_status status = 0; | |
27663c58 | 187 | unsigned long long psc = 0; |
1da177e4 | 188 | |
5e6d4fe4 RW |
189 | if (!device || !state) |
190 | return -EINVAL; | |
1da177e4 LT |
191 | |
192 | *state = ACPI_STATE_UNKNOWN; | |
193 | ||
5e6d4fe4 | 194 | if (device->flags.power_manageable) { |
1da177e4 | 195 | /* |
aafbcd16 | 196 | * Get the device's power state either directly (via _PSC) or |
1da177e4 LT |
197 | * indirectly (via power resources). |
198 | */ | |
0c99c528 | 199 | if (device->power.flags.power_resources) { |
5e6d4fe4 | 200 | result = acpi_power_get_inferred_state(device, state); |
0c99c528 ZR |
201 | if (result) |
202 | return result; | |
203 | } else if (device->power.flags.explicit_get) { | |
4be44fcd LB |
204 | status = acpi_evaluate_integer(device->handle, "_PSC", |
205 | NULL, &psc); | |
1da177e4 | 206 | if (ACPI_FAILURE(status)) |
d550d98d | 207 | return -ENODEV; |
5e6d4fe4 | 208 | *state = (int)psc; |
1da177e4 | 209 | } |
5e6d4fe4 RW |
210 | } else { |
211 | /* TBD: Non-recursive algorithm for walking up hierarchy. */ | |
212 | *state = device->parent ? | |
213 | device->parent->power.state : ACPI_STATE_D0; | |
1da177e4 LT |
214 | } |
215 | ||
216 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] power state is D%d\n", | |
5e6d4fe4 | 217 | device->pnp.bus_id, *state)); |
1da177e4 | 218 | |
d550d98d | 219 | return 0; |
1da177e4 | 220 | } |
1da177e4 | 221 | |
5e6d4fe4 | 222 | |
25eed407 | 223 | static int __acpi_bus_set_power(struct acpi_device *device, int state) |
1da177e4 | 224 | { |
4be44fcd LB |
225 | int result = 0; |
226 | acpi_status status = AE_OK; | |
4be44fcd | 227 | char object_name[5] = { '_', 'P', 'S', '0' + state, '\0' }; |
1da177e4 | 228 | |
25eed407 | 229 | if (!device || (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3)) |
d550d98d | 230 | return -EINVAL; |
1da177e4 LT |
231 | |
232 | /* Make sure this is a valid target state */ | |
233 | ||
488a76c5 | 234 | if (state == device->power.state) { |
b1028c54 KK |
235 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n", |
236 | state)); | |
237 | return 0; | |
1da177e4 | 238 | } |
b1028c54 | 239 | |
1da177e4 | 240 | if (!device->power.states[state].flags.valid) { |
cece9296 | 241 | printk(KERN_WARNING PREFIX "Device does not support D%d\n", state); |
d550d98d | 242 | return -ENODEV; |
1da177e4 LT |
243 | } |
244 | if (device->parent && (state < device->parent->power.state)) { | |
cece9296 | 245 | printk(KERN_WARNING PREFIX |
a6fc6720 | 246 | "Cannot set device to a higher-powered" |
cece9296 | 247 | " state than parent\n"); |
d550d98d | 248 | return -ENODEV; |
1da177e4 LT |
249 | } |
250 | ||
251 | /* | |
252 | * Transition Power | |
253 | * ---------------- | |
254 | * On transitions to a high-powered state we first apply power (via | |
255 | * power resources) then evalute _PSx. Conversly for transitions to | |
256 | * a lower-powered state. | |
b913100d | 257 | */ |
1da177e4 LT |
258 | if (state < device->power.state) { |
259 | if (device->power.flags.power_resources) { | |
260 | result = acpi_power_transition(device, state); | |
261 | if (result) | |
262 | goto end; | |
263 | } | |
264 | if (device->power.states[state].flags.explicit_set) { | |
4be44fcd LB |
265 | status = acpi_evaluate_object(device->handle, |
266 | object_name, NULL, NULL); | |
1da177e4 LT |
267 | if (ACPI_FAILURE(status)) { |
268 | result = -ENODEV; | |
269 | goto end; | |
270 | } | |
271 | } | |
4be44fcd | 272 | } else { |
1da177e4 | 273 | if (device->power.states[state].flags.explicit_set) { |
4be44fcd LB |
274 | status = acpi_evaluate_object(device->handle, |
275 | object_name, NULL, NULL); | |
1da177e4 LT |
276 | if (ACPI_FAILURE(status)) { |
277 | result = -ENODEV; | |
278 | goto end; | |
279 | } | |
280 | } | |
281 | if (device->power.flags.power_resources) { | |
282 | result = acpi_power_transition(device, state); | |
283 | if (result) | |
284 | goto end; | |
285 | } | |
286 | } | |
287 | ||
4be44fcd | 288 | end: |
1da177e4 | 289 | if (result) |
cece9296 | 290 | printk(KERN_WARNING PREFIX |
ddc50b6a | 291 | "Device [%s] failed to transition to D%d\n", |
cece9296 | 292 | device->pnp.bus_id, state); |
5e32132b SL |
293 | else { |
294 | device->power.state = state; | |
4be44fcd LB |
295 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
296 | "Device [%s] transitioned to D%d\n", | |
297 | device->pnp.bus_id, state)); | |
5e32132b | 298 | } |
1da177e4 | 299 | |
d550d98d | 300 | return result; |
1da177e4 | 301 | } |
1da177e4 | 302 | |
25eed407 RW |
303 | |
304 | int acpi_bus_set_power(acpi_handle handle, int state) | |
305 | { | |
306 | struct acpi_device *device; | |
307 | int result; | |
308 | ||
309 | result = acpi_bus_get_device(handle, &device); | |
310 | if (result) | |
311 | return result; | |
312 | ||
313 | if (!device->flags.power_manageable) { | |
314 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
315 | "Device [%s] is not power manageable\n", | |
316 | dev_name(&device->dev))); | |
317 | return -ENODEV; | |
318 | } | |
319 | ||
25eed407 RW |
320 | return __acpi_bus_set_power(device, state); |
321 | } | |
4be44fcd | 322 | EXPORT_SYMBOL(acpi_bus_set_power); |
1da177e4 | 323 | |
ade3e7fe RW |
324 | |
325 | int acpi_bus_init_power(struct acpi_device *device) | |
326 | { | |
327 | int state; | |
328 | int result; | |
329 | ||
330 | if (!device) | |
331 | return -EINVAL; | |
332 | ||
333 | device->power.state = ACPI_STATE_UNKNOWN; | |
334 | ||
335 | result = __acpi_bus_get_power(device, &state); | |
336 | if (result) | |
337 | return result; | |
338 | ||
339 | if (device->power.flags.power_resources) | |
340 | result = acpi_power_on_resources(device, state); | |
341 | ||
342 | if (!result) | |
343 | device->power.state = state; | |
344 | ||
345 | return result; | |
346 | } | |
347 | ||
348 | ||
25eed407 RW |
349 | int acpi_bus_update_power(acpi_handle handle, int *state_p) |
350 | { | |
351 | struct acpi_device *device; | |
352 | int state; | |
353 | int result; | |
354 | ||
355 | result = acpi_bus_get_device(handle, &device); | |
356 | if (result) | |
357 | return result; | |
358 | ||
359 | result = __acpi_bus_get_power(device, &state); | |
360 | if (result) | |
361 | return result; | |
362 | ||
363 | result = __acpi_bus_set_power(device, state); | |
364 | if (!result && state_p) | |
365 | *state_p = state; | |
366 | ||
367 | return result; | |
368 | } | |
369 | EXPORT_SYMBOL_GPL(acpi_bus_update_power); | |
370 | ||
371 | ||
3737b2b1 RW |
372 | bool acpi_bus_power_manageable(acpi_handle handle) |
373 | { | |
374 | struct acpi_device *device; | |
375 | int result; | |
376 | ||
377 | result = acpi_bus_get_device(handle, &device); | |
378 | return result ? false : device->flags.power_manageable; | |
379 | } | |
380 | ||
381 | EXPORT_SYMBOL(acpi_bus_power_manageable); | |
382 | ||
eb9d0fe4 RW |
383 | bool acpi_bus_can_wakeup(acpi_handle handle) |
384 | { | |
385 | struct acpi_device *device; | |
386 | int result; | |
387 | ||
388 | result = acpi_bus_get_device(handle, &device); | |
389 | return result ? false : device->wakeup.flags.valid; | |
390 | } | |
391 | ||
392 | EXPORT_SYMBOL(acpi_bus_can_wakeup); | |
393 | ||
70023de8 SL |
394 | static void acpi_print_osc_error(acpi_handle handle, |
395 | struct acpi_osc_context *context, char *error) | |
396 | { | |
397 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER}; | |
398 | int i; | |
399 | ||
400 | if (ACPI_FAILURE(acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer))) | |
401 | printk(KERN_DEBUG "%s\n", error); | |
402 | else { | |
403 | printk(KERN_DEBUG "%s:%s\n", (char *)buffer.pointer, error); | |
404 | kfree(buffer.pointer); | |
405 | } | |
406 | printk(KERN_DEBUG"_OSC request data:"); | |
407 | for (i = 0; i < context->cap.length; i += sizeof(u32)) | |
408 | printk("%x ", *((u32 *)(context->cap.pointer + i))); | |
409 | printk("\n"); | |
410 | } | |
411 | ||
70023de8 SL |
412 | static acpi_status acpi_str_to_uuid(char *str, u8 *uuid) |
413 | { | |
414 | int i; | |
415 | static int opc_map_to_uuid[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21, | |
416 | 24, 26, 28, 30, 32, 34}; | |
417 | ||
418 | if (strlen(str) != 36) | |
419 | return AE_BAD_PARAMETER; | |
420 | for (i = 0; i < 36; i++) { | |
421 | if (i == 8 || i == 13 || i == 18 || i == 23) { | |
422 | if (str[i] != '-') | |
423 | return AE_BAD_PARAMETER; | |
424 | } else if (!isxdigit(str[i])) | |
425 | return AE_BAD_PARAMETER; | |
426 | } | |
427 | for (i = 0; i < 16; i++) { | |
965fd9e9 AS |
428 | uuid[i] = hex_to_bin(str[opc_map_to_uuid[i]]) << 4; |
429 | uuid[i] |= hex_to_bin(str[opc_map_to_uuid[i] + 1]); | |
70023de8 SL |
430 | } |
431 | return AE_OK; | |
432 | } | |
433 | ||
434 | acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context) | |
435 | { | |
436 | acpi_status status; | |
437 | struct acpi_object_list input; | |
438 | union acpi_object in_params[4]; | |
439 | union acpi_object *out_obj; | |
440 | u8 uuid[16]; | |
441 | u32 errors; | |
9dc130fc | 442 | struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL}; |
70023de8 SL |
443 | |
444 | if (!context) | |
445 | return AE_ERROR; | |
446 | if (ACPI_FAILURE(acpi_str_to_uuid(context->uuid_str, uuid))) | |
447 | return AE_ERROR; | |
448 | context->ret.length = ACPI_ALLOCATE_BUFFER; | |
449 | context->ret.pointer = NULL; | |
450 | ||
451 | /* Setting up input parameters */ | |
452 | input.count = 4; | |
453 | input.pointer = in_params; | |
454 | in_params[0].type = ACPI_TYPE_BUFFER; | |
455 | in_params[0].buffer.length = 16; | |
456 | in_params[0].buffer.pointer = uuid; | |
457 | in_params[1].type = ACPI_TYPE_INTEGER; | |
458 | in_params[1].integer.value = context->rev; | |
459 | in_params[2].type = ACPI_TYPE_INTEGER; | |
460 | in_params[2].integer.value = context->cap.length/sizeof(u32); | |
461 | in_params[3].type = ACPI_TYPE_BUFFER; | |
462 | in_params[3].buffer.length = context->cap.length; | |
463 | in_params[3].buffer.pointer = context->cap.pointer; | |
464 | ||
9dc130fc | 465 | status = acpi_evaluate_object(handle, "_OSC", &input, &output); |
70023de8 SL |
466 | if (ACPI_FAILURE(status)) |
467 | return status; | |
468 | ||
9dc130fc | 469 | if (!output.length) |
70023de8 SL |
470 | return AE_NULL_OBJECT; |
471 | ||
9dc130fc SL |
472 | out_obj = output.pointer; |
473 | if (out_obj->type != ACPI_TYPE_BUFFER | |
474 | || out_obj->buffer.length != context->cap.length) { | |
70023de8 SL |
475 | acpi_print_osc_error(handle, context, |
476 | "_OSC evaluation returned wrong type"); | |
477 | status = AE_TYPE; | |
478 | goto out_kfree; | |
479 | } | |
480 | /* Need to ignore the bit0 in result code */ | |
481 | errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0); | |
482 | if (errors) { | |
483 | if (errors & OSC_REQUEST_ERROR) | |
484 | acpi_print_osc_error(handle, context, | |
485 | "_OSC request failed"); | |
486 | if (errors & OSC_INVALID_UUID_ERROR) | |
487 | acpi_print_osc_error(handle, context, | |
488 | "_OSC invalid UUID"); | |
489 | if (errors & OSC_INVALID_REVISION_ERROR) | |
490 | acpi_print_osc_error(handle, context, | |
491 | "_OSC invalid revision"); | |
492 | if (errors & OSC_CAPABILITIES_MASK_ERROR) { | |
493 | if (((u32 *)context->cap.pointer)[OSC_QUERY_TYPE] | |
494 | & OSC_QUERY_ENABLE) | |
495 | goto out_success; | |
496 | status = AE_SUPPORT; | |
497 | goto out_kfree; | |
498 | } | |
499 | status = AE_ERROR; | |
500 | goto out_kfree; | |
501 | } | |
502 | out_success: | |
9dc130fc SL |
503 | context->ret.length = out_obj->buffer.length; |
504 | context->ret.pointer = kmalloc(context->ret.length, GFP_KERNEL); | |
505 | if (!context->ret.pointer) { | |
506 | status = AE_NO_MEMORY; | |
507 | goto out_kfree; | |
508 | } | |
509 | memcpy(context->ret.pointer, out_obj->buffer.pointer, | |
510 | context->ret.length); | |
511 | status = AE_OK; | |
70023de8 SL |
512 | |
513 | out_kfree: | |
9dc130fc SL |
514 | kfree(output.pointer); |
515 | if (status != AE_OK) | |
516 | context->ret.pointer = NULL; | |
70023de8 SL |
517 | return status; |
518 | } | |
519 | EXPORT_SYMBOL(acpi_run_osc); | |
520 | ||
3563ff96 SL |
521 | static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48"; |
522 | static void acpi_bus_osc_support(void) | |
523 | { | |
524 | u32 capbuf[2]; | |
525 | struct acpi_osc_context context = { | |
526 | .uuid_str = sb_uuid_str, | |
527 | .rev = 1, | |
528 | .cap.length = 8, | |
529 | .cap.pointer = capbuf, | |
530 | }; | |
531 | acpi_handle handle; | |
532 | ||
533 | capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE; | |
534 | capbuf[OSC_SUPPORT_TYPE] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */ | |
6a4e2b75 ZY |
535 | #if defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) ||\ |
536 | defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE) | |
3563ff96 SL |
537 | capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PAD_SUPPORT; |
538 | #endif | |
6a4e2b75 ZY |
539 | |
540 | #if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE) | |
541 | capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PPC_OST_SUPPORT; | |
542 | #endif | |
3563ff96 SL |
543 | if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle))) |
544 | return; | |
545 | if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) | |
546 | kfree(context.ret.pointer); | |
547 | /* do we need to check the returned cap? Sounds no */ | |
548 | } | |
549 | ||
1da177e4 LT |
550 | /* -------------------------------------------------------------------------- |
551 | Event Management | |
552 | -------------------------------------------------------------------------- */ | |
553 | ||
14e04fb3 | 554 | #ifdef CONFIG_ACPI_PROC_EVENT |
1da177e4 LT |
555 | static DEFINE_SPINLOCK(acpi_bus_event_lock); |
556 | ||
557 | LIST_HEAD(acpi_bus_event_list); | |
558 | DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue); | |
559 | ||
4be44fcd | 560 | extern int event_is_open; |
1da177e4 | 561 | |
8db85d4c | 562 | int acpi_bus_generate_proc_event4(const char *device_class, const char *bus_id, u8 type, int data) |
1da177e4 | 563 | { |
8db85d4c | 564 | struct acpi_bus_event *event; |
4be44fcd | 565 | unsigned long flags = 0; |
1da177e4 | 566 | |
1da177e4 LT |
567 | /* drop event on the floor if no one's listening */ |
568 | if (!event_is_open) | |
d550d98d | 569 | return 0; |
1da177e4 | 570 | |
5cc4a0f6 | 571 | event = kzalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC); |
1da177e4 | 572 | if (!event) |
d550d98d | 573 | return -ENOMEM; |
1da177e4 | 574 | |
8db85d4c AS |
575 | strcpy(event->device_class, device_class); |
576 | strcpy(event->bus_id, bus_id); | |
1da177e4 LT |
577 | event->type = type; |
578 | event->data = data; | |
579 | ||
580 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
581 | list_add_tail(&event->node, &acpi_bus_event_list); | |
582 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); | |
583 | ||
584 | wake_up_interruptible(&acpi_bus_event_queue); | |
585 | ||
d550d98d | 586 | return 0; |
8db85d4c AS |
587 | |
588 | } | |
589 | ||
590 | EXPORT_SYMBOL_GPL(acpi_bus_generate_proc_event4); | |
591 | ||
592 | int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data) | |
593 | { | |
594 | if (!device) | |
595 | return -EINVAL; | |
596 | return acpi_bus_generate_proc_event4(device->pnp.device_class, | |
597 | device->pnp.bus_id, type, data); | |
1da177e4 | 598 | } |
4be44fcd | 599 | |
14e04fb3 | 600 | EXPORT_SYMBOL(acpi_bus_generate_proc_event); |
1da177e4 | 601 | |
4be44fcd | 602 | int acpi_bus_receive_event(struct acpi_bus_event *event) |
1da177e4 | 603 | { |
4be44fcd LB |
604 | unsigned long flags = 0; |
605 | struct acpi_bus_event *entry = NULL; | |
1da177e4 LT |
606 | |
607 | DECLARE_WAITQUEUE(wait, current); | |
608 | ||
1da177e4 LT |
609 | |
610 | if (!event) | |
d550d98d | 611 | return -EINVAL; |
1da177e4 LT |
612 | |
613 | if (list_empty(&acpi_bus_event_list)) { | |
614 | ||
615 | set_current_state(TASK_INTERRUPTIBLE); | |
616 | add_wait_queue(&acpi_bus_event_queue, &wait); | |
617 | ||
618 | if (list_empty(&acpi_bus_event_list)) | |
619 | schedule(); | |
620 | ||
621 | remove_wait_queue(&acpi_bus_event_queue, &wait); | |
622 | set_current_state(TASK_RUNNING); | |
623 | ||
624 | if (signal_pending(current)) | |
d550d98d | 625 | return -ERESTARTSYS; |
1da177e4 LT |
626 | } |
627 | ||
628 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
f0a37e00 CE |
629 | if (!list_empty(&acpi_bus_event_list)) { |
630 | entry = list_entry(acpi_bus_event_list.next, | |
631 | struct acpi_bus_event, node); | |
1da177e4 | 632 | list_del(&entry->node); |
f0a37e00 | 633 | } |
1da177e4 LT |
634 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); |
635 | ||
636 | if (!entry) | |
d550d98d | 637 | return -ENODEV; |
1da177e4 LT |
638 | |
639 | memcpy(event, entry, sizeof(struct acpi_bus_event)); | |
640 | ||
641 | kfree(entry); | |
642 | ||
d550d98d | 643 | return 0; |
1da177e4 | 644 | } |
1da177e4 | 645 | |
14e04fb3 | 646 | #endif /* CONFIG_ACPI_PROC_EVENT */ |
1da177e4 LT |
647 | |
648 | /* -------------------------------------------------------------------------- | |
649 | Notification Handling | |
650 | -------------------------------------------------------------------------- */ | |
651 | ||
ff754e2e | 652 | static void acpi_bus_check_device(acpi_handle handle) |
1da177e4 | 653 | { |
ff754e2e | 654 | struct acpi_device *device; |
cdd5b8ca | 655 | acpi_status status; |
1da177e4 LT |
656 | struct acpi_device_status old_status; |
657 | ||
ff754e2e BH |
658 | if (acpi_bus_get_device(handle, &device)) |
659 | return; | |
1da177e4 | 660 | if (!device) |
cdd5b8ca | 661 | return; |
1da177e4 | 662 | |
1da177e4 LT |
663 | old_status = device->status; |
664 | ||
665 | /* | |
666 | * Make sure this device's parent is present before we go about | |
667 | * messing with the device. | |
668 | */ | |
669 | if (device->parent && !device->parent->status.present) { | |
670 | device->status = device->parent->status; | |
cdd5b8ca | 671 | return; |
1da177e4 LT |
672 | } |
673 | ||
674 | status = acpi_bus_get_status(device); | |
675 | if (ACPI_FAILURE(status)) | |
cdd5b8ca | 676 | return; |
1da177e4 LT |
677 | |
678 | if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status)) | |
cdd5b8ca | 679 | return; |
1da177e4 | 680 | |
1da177e4 LT |
681 | /* |
682 | * Device Insertion/Removal | |
683 | */ | |
684 | if ((device->status.present) && !(old_status.present)) { | |
685 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n")); | |
686 | /* TBD: Handle device insertion */ | |
4be44fcd | 687 | } else if (!(device->status.present) && (old_status.present)) { |
1da177e4 LT |
688 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n")); |
689 | /* TBD: Handle device removal */ | |
690 | } | |
1da177e4 LT |
691 | } |
692 | ||
ff754e2e | 693 | static void acpi_bus_check_scope(acpi_handle handle) |
1da177e4 | 694 | { |
1da177e4 | 695 | /* Status Change? */ |
ff754e2e | 696 | acpi_bus_check_device(handle); |
1da177e4 | 697 | |
1da177e4 LT |
698 | /* |
699 | * TBD: Enumerate child devices within this device's scope and | |
700 | * run acpi_bus_check_device()'s on them. | |
701 | */ | |
1da177e4 LT |
702 | } |
703 | ||
6bd00a61 SL |
704 | static BLOCKING_NOTIFIER_HEAD(acpi_bus_notify_list); |
705 | int register_acpi_bus_notifier(struct notifier_block *nb) | |
706 | { | |
707 | return blocking_notifier_chain_register(&acpi_bus_notify_list, nb); | |
708 | } | |
709 | EXPORT_SYMBOL_GPL(register_acpi_bus_notifier); | |
710 | ||
711 | void unregister_acpi_bus_notifier(struct notifier_block *nb) | |
712 | { | |
713 | blocking_notifier_chain_unregister(&acpi_bus_notify_list, nb); | |
714 | } | |
715 | EXPORT_SYMBOL_GPL(unregister_acpi_bus_notifier); | |
716 | ||
1da177e4 LT |
717 | /** |
718 | * acpi_bus_notify | |
719 | * --------------- | |
720 | * Callback for all 'system-level' device notifications (values 0x00-0x7F). | |
721 | */ | |
4be44fcd | 722 | static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) |
1da177e4 | 723 | { |
4be44fcd | 724 | struct acpi_device *device = NULL; |
6d278131 | 725 | struct acpi_driver *driver; |
1da177e4 | 726 | |
02c37bd8 BH |
727 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Notification %#02x to handle %p\n", |
728 | type, handle)); | |
729 | ||
6bd00a61 SL |
730 | blocking_notifier_call_chain(&acpi_bus_notify_list, |
731 | type, (void *)handle); | |
1da177e4 | 732 | |
1da177e4 LT |
733 | switch (type) { |
734 | ||
735 | case ACPI_NOTIFY_BUS_CHECK: | |
ff754e2e | 736 | acpi_bus_check_scope(handle); |
aafbcd16 | 737 | /* |
1da177e4 | 738 | * TBD: We'll need to outsource certain events to non-ACPI |
4be44fcd | 739 | * drivers via the device manager (device.c). |
1da177e4 LT |
740 | */ |
741 | break; | |
742 | ||
743 | case ACPI_NOTIFY_DEVICE_CHECK: | |
ff754e2e | 744 | acpi_bus_check_device(handle); |
aafbcd16 | 745 | /* |
1da177e4 | 746 | * TBD: We'll need to outsource certain events to non-ACPI |
4be44fcd | 747 | * drivers via the device manager (device.c). |
1da177e4 LT |
748 | */ |
749 | break; | |
750 | ||
751 | case ACPI_NOTIFY_DEVICE_WAKE: | |
1da177e4 LT |
752 | /* TBD */ |
753 | break; | |
754 | ||
755 | case ACPI_NOTIFY_EJECT_REQUEST: | |
1da177e4 LT |
756 | /* TBD */ |
757 | break; | |
758 | ||
759 | case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: | |
1da177e4 LT |
760 | /* TBD: Exactly what does 'light' mean? */ |
761 | break; | |
762 | ||
763 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
1da177e4 LT |
764 | /* TBD */ |
765 | break; | |
766 | ||
767 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
1da177e4 LT |
768 | /* TBD */ |
769 | break; | |
770 | ||
771 | case ACPI_NOTIFY_POWER_FAULT: | |
1da177e4 LT |
772 | /* TBD */ |
773 | break; | |
774 | ||
775 | default: | |
4be44fcd LB |
776 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
777 | "Received unknown/unsupported notification [%08x]\n", | |
778 | type)); | |
1da177e4 LT |
779 | break; |
780 | } | |
781 | ||
ff754e2e BH |
782 | acpi_bus_get_device(handle, &device); |
783 | if (device) { | |
784 | driver = device->driver; | |
785 | if (driver && driver->ops.notify && | |
786 | (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS)) | |
787 | driver->ops.notify(device, type); | |
788 | } | |
1da177e4 LT |
789 | } |
790 | ||
791 | /* -------------------------------------------------------------------------- | |
792 | Initialization/Cleanup | |
793 | -------------------------------------------------------------------------- */ | |
794 | ||
4be44fcd | 795 | static int __init acpi_bus_init_irq(void) |
1da177e4 | 796 | { |
4be44fcd LB |
797 | acpi_status status = AE_OK; |
798 | union acpi_object arg = { ACPI_TYPE_INTEGER }; | |
799 | struct acpi_object_list arg_list = { 1, &arg }; | |
800 | char *message = NULL; | |
1da177e4 | 801 | |
1da177e4 | 802 | |
aafbcd16 | 803 | /* |
1da177e4 LT |
804 | * Let the system know what interrupt model we are using by |
805 | * evaluating the \_PIC object, if exists. | |
806 | */ | |
807 | ||
808 | switch (acpi_irq_model) { | |
809 | case ACPI_IRQ_MODEL_PIC: | |
810 | message = "PIC"; | |
811 | break; | |
812 | case ACPI_IRQ_MODEL_IOAPIC: | |
813 | message = "IOAPIC"; | |
814 | break; | |
815 | case ACPI_IRQ_MODEL_IOSAPIC: | |
816 | message = "IOSAPIC"; | |
817 | break; | |
3948ec94 JK |
818 | case ACPI_IRQ_MODEL_PLATFORM: |
819 | message = "platform specific model"; | |
820 | break; | |
1da177e4 LT |
821 | default: |
822 | printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n"); | |
d550d98d | 823 | return -ENODEV; |
1da177e4 LT |
824 | } |
825 | ||
826 | printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message); | |
827 | ||
828 | arg.integer.value = acpi_irq_model; | |
829 | ||
830 | status = acpi_evaluate_object(NULL, "\\_PIC", &arg_list, NULL); | |
831 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { | |
a6fc6720 | 832 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC")); |
d550d98d | 833 | return -ENODEV; |
1da177e4 LT |
834 | } |
835 | ||
d550d98d | 836 | return 0; |
1da177e4 LT |
837 | } |
838 | ||
67a119f9 | 839 | u8 acpi_gbl_permanent_mmap; |
ad71860a AS |
840 | |
841 | ||
4be44fcd | 842 | void __init acpi_early_init(void) |
1da177e4 | 843 | { |
4be44fcd | 844 | acpi_status status = AE_OK; |
1da177e4 LT |
845 | |
846 | if (acpi_disabled) | |
d550d98d | 847 | return; |
1da177e4 | 848 | |
61686124 BM |
849 | printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION); |
850 | ||
1da177e4 LT |
851 | /* enable workarounds, unless strict ACPI spec. compliance */ |
852 | if (!acpi_strict) | |
853 | acpi_gbl_enable_interpreter_slack = TRUE; | |
854 | ||
ad71860a AS |
855 | acpi_gbl_permanent_mmap = 1; |
856 | ||
aa2110cb LM |
857 | /* |
858 | * If the machine falls into the DMI check table, | |
859 | * DSDT will be copied to memory | |
860 | */ | |
861 | dmi_check_system(dsdt_dmi_table); | |
862 | ||
ad71860a AS |
863 | status = acpi_reallocate_root_table(); |
864 | if (ACPI_FAILURE(status)) { | |
865 | printk(KERN_ERR PREFIX | |
866 | "Unable to reallocate ACPI tables\n"); | |
867 | goto error0; | |
868 | } | |
869 | ||
1da177e4 LT |
870 | status = acpi_initialize_subsystem(); |
871 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
872 | printk(KERN_ERR PREFIX |
873 | "Unable to initialize the ACPI Interpreter\n"); | |
1da177e4 LT |
874 | goto error0; |
875 | } | |
876 | ||
877 | status = acpi_load_tables(); | |
878 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
879 | printk(KERN_ERR PREFIX |
880 | "Unable to load the System Description Tables\n"); | |
1da177e4 LT |
881 | goto error0; |
882 | } | |
883 | ||
1da177e4 LT |
884 | #ifdef CONFIG_X86 |
885 | if (!acpi_ioapic) { | |
1da177e4 | 886 | /* compatible (0) means level (3) */ |
5f3b1a8b AS |
887 | if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) { |
888 | acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK; | |
889 | acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL; | |
890 | } | |
1da177e4 | 891 | /* Set PIC-mode SCI trigger type */ |
cee324b1 | 892 | acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt, |
5f3b1a8b | 893 | (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2); |
1da177e4 | 894 | } else { |
1da177e4 | 895 | /* |
cee324b1 | 896 | * now that acpi_gbl_FADT is initialized, |
1da177e4 LT |
897 | * update it with result from INT_SRC_OVR parsing |
898 | */ | |
cee324b1 | 899 | acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi; |
1da177e4 LT |
900 | } |
901 | #endif | |
902 | ||
4be44fcd LB |
903 | status = |
904 | acpi_enable_subsystem(~ | |
905 | (ACPI_NO_HARDWARE_INIT | | |
906 | ACPI_NO_ACPI_ENABLE)); | |
1da177e4 LT |
907 | if (ACPI_FAILURE(status)) { |
908 | printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); | |
909 | goto error0; | |
910 | } | |
911 | ||
d550d98d | 912 | return; |
1da177e4 | 913 | |
4be44fcd | 914 | error0: |
1da177e4 | 915 | disable_acpi(); |
d550d98d | 916 | return; |
1da177e4 LT |
917 | } |
918 | ||
4be44fcd | 919 | static int __init acpi_bus_init(void) |
1da177e4 | 920 | { |
4be44fcd LB |
921 | int result = 0; |
922 | acpi_status status = AE_OK; | |
923 | extern acpi_status acpi_os_initialize1(void); | |
1da177e4 | 924 | |
176f9c18 | 925 | acpi_os_initialize1(); |
1da177e4 | 926 | |
4be44fcd LB |
927 | status = |
928 | acpi_enable_subsystem(ACPI_NO_HARDWARE_INIT | ACPI_NO_ACPI_ENABLE); | |
1da177e4 | 929 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
930 | printk(KERN_ERR PREFIX |
931 | "Unable to start the ACPI Interpreter\n"); | |
1da177e4 LT |
932 | goto error1; |
933 | } | |
934 | ||
1da177e4 LT |
935 | /* |
936 | * ACPI 2.0 requires the EC driver to be loaded and work before | |
937 | * the EC device is found in the namespace (i.e. before acpi_initialize_objects() | |
938 | * is called). | |
939 | * | |
aafbcd16 | 940 | * This is accomplished by looking for the ECDT table, and getting |
1da177e4 LT |
941 | * the EC parameters out of that. |
942 | */ | |
943 | status = acpi_ec_ecdt_probe(); | |
944 | /* Ignore result. Not having an ECDT is not fatal. */ | |
1da177e4 | 945 | |
3563ff96 SL |
946 | acpi_bus_osc_support(); |
947 | ||
1da177e4 LT |
948 | status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); |
949 | if (ACPI_FAILURE(status)) { | |
950 | printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); | |
951 | goto error1; | |
952 | } | |
953 | ||
b1d248d9 ZR |
954 | /* |
955 | * _PDC control method may load dynamic SSDT tables, | |
956 | * and we need to install the table handler before that. | |
957 | */ | |
958 | acpi_sysfs_init(); | |
959 | ||
78f16996 AC |
960 | acpi_early_processor_set_pdc(); |
961 | ||
455c8793 ZY |
962 | /* |
963 | * Maybe EC region is required at bus_scan/acpi_get_devices. So it | |
964 | * is necessary to enable it as early as possible. | |
965 | */ | |
966 | acpi_boot_ec_enable(); | |
967 | ||
1da177e4 LT |
968 | printk(KERN_INFO PREFIX "Interpreter enabled\n"); |
969 | ||
aafbcd16 AS |
970 | /* Initialize sleep structures */ |
971 | acpi_sleep_init(); | |
972 | ||
1da177e4 LT |
973 | /* |
974 | * Get the system interrupt model and evaluate \_PIC. | |
975 | */ | |
976 | result = acpi_bus_init_irq(); | |
977 | if (result) | |
978 | goto error1; | |
979 | ||
980 | /* | |
981 | * Register the for all standard device notifications. | |
982 | */ | |
4be44fcd LB |
983 | status = |
984 | acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, | |
985 | &acpi_bus_notify, NULL); | |
1da177e4 | 986 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
987 | printk(KERN_ERR PREFIX |
988 | "Unable to register for device notifications\n"); | |
1da177e4 LT |
989 | goto error1; |
990 | } | |
991 | ||
992 | /* | |
993 | * Create the top ACPI proc directory | |
994 | */ | |
995 | acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); | |
996 | ||
d550d98d | 997 | return 0; |
1da177e4 LT |
998 | |
999 | /* Mimic structured exception handling */ | |
4be44fcd | 1000 | error1: |
1da177e4 | 1001 | acpi_terminate(); |
d550d98d | 1002 | return -ENODEV; |
1da177e4 LT |
1003 | } |
1004 | ||
99e0d2fc | 1005 | struct kobject *acpi_kobj; |
1da177e4 | 1006 | |
4be44fcd | 1007 | static int __init acpi_init(void) |
1da177e4 | 1008 | { |
4be44fcd | 1009 | int result = 0; |
1da177e4 | 1010 | |
1da177e4 | 1011 | |
1da177e4 LT |
1012 | if (acpi_disabled) { |
1013 | printk(KERN_INFO PREFIX "Interpreter disabled.\n"); | |
d550d98d | 1014 | return -ENODEV; |
1da177e4 LT |
1015 | } |
1016 | ||
f62ed9e3 | 1017 | acpi_kobj = kobject_create_and_add("acpi", firmware_kobj); |
99e0d2fc | 1018 | if (!acpi_kobj) { |
96b2dd1f | 1019 | printk(KERN_WARNING "%s: kset create error\n", __func__); |
99e0d2fc GKH |
1020 | acpi_kobj = NULL; |
1021 | } | |
1da177e4 | 1022 | |
0e46517d | 1023 | init_acpi_device_notify(); |
1da177e4 LT |
1024 | result = acpi_bus_init(); |
1025 | ||
1026 | if (!result) { | |
7752d5cf | 1027 | pci_mmcfg_late_init(); |
9f9adecd LB |
1028 | if (!(pm_flags & PM_APM)) |
1029 | pm_flags |= PM_ACPI; | |
1da177e4 | 1030 | else { |
4be44fcd LB |
1031 | printk(KERN_INFO PREFIX |
1032 | "APM is already active, exiting\n"); | |
1da177e4 LT |
1033 | disable_acpi(); |
1034 | result = -ENODEV; | |
1035 | } | |
1da177e4 LT |
1036 | } else |
1037 | disable_acpi(); | |
81d0273d BH |
1038 | |
1039 | if (acpi_disabled) | |
1040 | return result; | |
1041 | ||
e747f274 | 1042 | acpi_scan_init(); |
a5f820fe | 1043 | acpi_ec_init(); |
a25ee920 | 1044 | acpi_debugfs_init(); |
9cee43e0 | 1045 | acpi_sleep_proc_init(); |
201b8c65 | 1046 | acpi_wakeup_device_init(); |
d550d98d | 1047 | return result; |
1da177e4 LT |
1048 | } |
1049 | ||
1050 | subsys_initcall(acpi_init); |