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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> | |
eccddd32 | 42 | #include <acpi/apei.h> |
eb27cae8 | 43 | #include <linux/dmi.h> |
cd51e61c | 44 | #include <linux/suspend.h> |
1da177e4 | 45 | |
e60cc7a6 BH |
46 | #include "internal.h" |
47 | ||
1da177e4 | 48 | #define _COMPONENT ACPI_BUS_COMPONENT |
f52fd66d | 49 | ACPI_MODULE_NAME("bus"); |
1da177e4 | 50 | |
4be44fcd LB |
51 | struct acpi_device *acpi_root; |
52 | struct proc_dir_entry *acpi_root_dir; | |
1da177e4 LT |
53 | EXPORT_SYMBOL(acpi_root_dir); |
54 | ||
55 | #define STRUCT_TO_INT(s) (*((int*)&s)) | |
56 | ||
6415e12b | 57 | |
cce4f632 | 58 | #ifdef CONFIG_X86 |
aa2110cb LM |
59 | static int set_copy_dsdt(const struct dmi_system_id *id) |
60 | { | |
61 | printk(KERN_NOTICE "%s detected - " | |
62 | "force copy of DSDT to local memory\n", id->ident); | |
63 | acpi_gbl_copy_dsdt_locally = 1; | |
64 | return 0; | |
65 | } | |
66 | ||
67 | static struct dmi_system_id dsdt_dmi_table[] __initdata = { | |
68 | /* | |
100cf877 | 69 | * Invoke DSDT corruption work-around on all Toshiba Satellite. |
aa2110cb LM |
70 | * https://bugzilla.kernel.org/show_bug.cgi?id=14679 |
71 | */ | |
72 | { | |
73 | .callback = set_copy_dsdt, | |
100cf877 | 74 | .ident = "TOSHIBA Satellite", |
aa2110cb LM |
75 | .matches = { |
76 | DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), | |
100cf877 | 77 | DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"), |
aa2110cb | 78 | }, |
cce4f632 LM |
79 | }, |
80 | {} | |
aa2110cb | 81 | }; |
cce4f632 LM |
82 | #else |
83 | static struct dmi_system_id dsdt_dmi_table[] __initdata = { | |
84 | {} | |
85 | }; | |
86 | #endif | |
aa2110cb | 87 | |
1da177e4 LT |
88 | /* -------------------------------------------------------------------------- |
89 | Device Management | |
90 | -------------------------------------------------------------------------- */ | |
91 | ||
4be44fcd | 92 | int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device) |
1da177e4 | 93 | { |
4be44fcd | 94 | acpi_status status = AE_OK; |
1da177e4 | 95 | |
1da177e4 LT |
96 | |
97 | if (!device) | |
d550d98d | 98 | return -EINVAL; |
1da177e4 LT |
99 | |
100 | /* TBD: Support fixed-feature devices */ | |
101 | ||
4be44fcd | 102 | status = acpi_get_data(handle, acpi_bus_data_handler, (void **)device); |
1da177e4 | 103 | if (ACPI_FAILURE(status) || !*device) { |
9805cb76 LB |
104 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", |
105 | handle)); | |
d550d98d | 106 | return -ENODEV; |
1da177e4 LT |
107 | } |
108 | ||
d550d98d | 109 | return 0; |
1da177e4 | 110 | } |
4be44fcd | 111 | |
1da177e4 LT |
112 | EXPORT_SYMBOL(acpi_bus_get_device); |
113 | ||
402ac536 BH |
114 | acpi_status acpi_bus_get_status_handle(acpi_handle handle, |
115 | unsigned long long *sta) | |
1da177e4 | 116 | { |
402ac536 | 117 | acpi_status status; |
4be44fcd | 118 | |
402ac536 BH |
119 | status = acpi_evaluate_integer(handle, "_STA", NULL, sta); |
120 | if (ACPI_SUCCESS(status)) | |
121 | return AE_OK; | |
1da177e4 | 122 | |
402ac536 BH |
123 | if (status == AE_NOT_FOUND) { |
124 | *sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | | |
125 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; | |
126 | return AE_OK; | |
1da177e4 | 127 | } |
402ac536 BH |
128 | return status; |
129 | } | |
1da177e4 | 130 | |
402ac536 BH |
131 | int acpi_bus_get_status(struct acpi_device *device) |
132 | { | |
133 | acpi_status status; | |
134 | unsigned long long sta; | |
135 | ||
136 | status = acpi_bus_get_status_handle(device->handle, &sta); | |
137 | if (ACPI_FAILURE(status)) | |
138 | return -ENODEV; | |
139 | ||
140 | STRUCT_TO_INT(device->status) = (int) sta; | |
1da177e4 LT |
141 | |
142 | if (device->status.functional && !device->status.present) { | |
39a0ad87 ZY |
143 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: " |
144 | "functional but not present;\n", | |
145 | device->pnp.bus_id, | |
146 | (u32) STRUCT_TO_INT(device->status))); | |
1da177e4 LT |
147 | } |
148 | ||
4be44fcd LB |
149 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n", |
150 | device->pnp.bus_id, | |
151 | (u32) STRUCT_TO_INT(device->status))); | |
d550d98d | 152 | return 0; |
1da177e4 | 153 | } |
4be44fcd | 154 | EXPORT_SYMBOL(acpi_bus_get_status); |
1da177e4 | 155 | |
20733939 | 156 | void acpi_bus_private_data_handler(acpi_handle handle, |
8e4319c4 | 157 | void *context) |
20733939 ZR |
158 | { |
159 | return; | |
160 | } | |
161 | EXPORT_SYMBOL(acpi_bus_private_data_handler); | |
162 | ||
163 | int acpi_bus_get_private_data(acpi_handle handle, void **data) | |
164 | { | |
165 | acpi_status status = AE_OK; | |
166 | ||
167 | if (!*data) | |
168 | return -EINVAL; | |
169 | ||
170 | status = acpi_get_data(handle, acpi_bus_private_data_handler, data); | |
171 | if (ACPI_FAILURE(status) || !*data) { | |
172 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", | |
173 | handle)); | |
174 | return -ENODEV; | |
175 | } | |
176 | ||
177 | return 0; | |
178 | } | |
179 | EXPORT_SYMBOL(acpi_bus_get_private_data); | |
180 | ||
1da177e4 LT |
181 | /* -------------------------------------------------------------------------- |
182 | Power Management | |
183 | -------------------------------------------------------------------------- */ | |
184 | ||
63a1a765 RW |
185 | static const char *state_string(int state) |
186 | { | |
187 | switch (state) { | |
188 | case ACPI_STATE_D0: | |
189 | return "D0"; | |
190 | case ACPI_STATE_D1: | |
191 | return "D1"; | |
192 | case ACPI_STATE_D2: | |
193 | return "D2"; | |
194 | case ACPI_STATE_D3_HOT: | |
195 | return "D3hot"; | |
196 | case ACPI_STATE_D3_COLD: | |
197 | return "D3"; | |
198 | default: | |
199 | return "(unknown)"; | |
200 | } | |
201 | } | |
202 | ||
5e6d4fe4 | 203 | static int __acpi_bus_get_power(struct acpi_device *device, int *state) |
1da177e4 | 204 | { |
38c92fff | 205 | int result = ACPI_STATE_UNKNOWN; |
1da177e4 | 206 | |
5e6d4fe4 RW |
207 | if (!device || !state) |
208 | return -EINVAL; | |
1da177e4 | 209 | |
38c92fff | 210 | if (!device->flags.power_manageable) { |
5e6d4fe4 RW |
211 | /* TBD: Non-recursive algorithm for walking up hierarchy. */ |
212 | *state = device->parent ? | |
213 | device->parent->power.state : ACPI_STATE_D0; | |
38c92fff RW |
214 | goto out; |
215 | } | |
216 | ||
217 | /* | |
218 | * Get the device's power state either directly (via _PSC) or | |
219 | * indirectly (via power resources). | |
220 | */ | |
221 | if (device->power.flags.explicit_get) { | |
222 | unsigned long long psc; | |
223 | acpi_status status = acpi_evaluate_integer(device->handle, | |
224 | "_PSC", NULL, &psc); | |
225 | if (ACPI_FAILURE(status)) | |
226 | return -ENODEV; | |
227 | ||
228 | result = psc; | |
229 | } | |
230 | /* The test below covers ACPI_STATE_UNKNOWN too. */ | |
231 | if (result <= ACPI_STATE_D2) { | |
232 | ; /* Do nothing. */ | |
233 | } else if (device->power.flags.power_resources) { | |
234 | int error = acpi_power_get_inferred_state(device, &result); | |
235 | if (error) | |
236 | return error; | |
237 | } else if (result == ACPI_STATE_D3_HOT) { | |
238 | result = ACPI_STATE_D3; | |
1da177e4 | 239 | } |
38c92fff | 240 | *state = result; |
1da177e4 | 241 | |
38c92fff | 242 | out: |
63a1a765 RW |
243 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] power state is %s\n", |
244 | device->pnp.bus_id, state_string(*state))); | |
1da177e4 | 245 | |
d550d98d | 246 | return 0; |
1da177e4 | 247 | } |
1da177e4 | 248 | |
5e6d4fe4 | 249 | |
25eed407 | 250 | static int __acpi_bus_set_power(struct acpi_device *device, int state) |
1da177e4 | 251 | { |
4be44fcd LB |
252 | int result = 0; |
253 | acpi_status status = AE_OK; | |
4be44fcd | 254 | char object_name[5] = { '_', 'P', 'S', '0' + state, '\0' }; |
1da177e4 | 255 | |
28c2103d | 256 | if (!device || (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3_COLD)) |
d550d98d | 257 | return -EINVAL; |
1da177e4 LT |
258 | |
259 | /* Make sure this is a valid target state */ | |
260 | ||
488a76c5 | 261 | if (state == device->power.state) { |
63a1a765 RW |
262 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at %s\n", |
263 | state_string(state))); | |
b1028c54 | 264 | return 0; |
1da177e4 | 265 | } |
b1028c54 | 266 | |
1da177e4 | 267 | if (!device->power.states[state].flags.valid) { |
63a1a765 RW |
268 | printk(KERN_WARNING PREFIX "Device does not support %s\n", |
269 | state_string(state)); | |
d550d98d | 270 | return -ENODEV; |
1da177e4 LT |
271 | } |
272 | if (device->parent && (state < device->parent->power.state)) { | |
cece9296 | 273 | printk(KERN_WARNING PREFIX |
a6fc6720 | 274 | "Cannot set device to a higher-powered" |
cece9296 | 275 | " state than parent\n"); |
d550d98d | 276 | return -ENODEV; |
1da177e4 LT |
277 | } |
278 | ||
5c7dd710 RW |
279 | /* For D3cold we should execute _PS3, not _PS4. */ |
280 | if (state == ACPI_STATE_D3_COLD) | |
281 | object_name[3] = '3'; | |
282 | ||
1da177e4 LT |
283 | /* |
284 | * Transition Power | |
285 | * ---------------- | |
286 | * On transitions to a high-powered state we first apply power (via | |
287 | * power resources) then evalute _PSx. Conversly for transitions to | |
288 | * a lower-powered state. | |
b913100d | 289 | */ |
1da177e4 LT |
290 | if (state < device->power.state) { |
291 | if (device->power.flags.power_resources) { | |
292 | result = acpi_power_transition(device, state); | |
293 | if (result) | |
294 | goto end; | |
295 | } | |
296 | if (device->power.states[state].flags.explicit_set) { | |
4be44fcd LB |
297 | status = acpi_evaluate_object(device->handle, |
298 | object_name, NULL, NULL); | |
1da177e4 LT |
299 | if (ACPI_FAILURE(status)) { |
300 | result = -ENODEV; | |
301 | goto end; | |
302 | } | |
303 | } | |
4be44fcd | 304 | } else { |
1da177e4 | 305 | if (device->power.states[state].flags.explicit_set) { |
4be44fcd LB |
306 | status = acpi_evaluate_object(device->handle, |
307 | object_name, NULL, NULL); | |
1da177e4 LT |
308 | if (ACPI_FAILURE(status)) { |
309 | result = -ENODEV; | |
310 | goto end; | |
311 | } | |
312 | } | |
313 | if (device->power.flags.power_resources) { | |
314 | result = acpi_power_transition(device, state); | |
315 | if (result) | |
316 | goto end; | |
317 | } | |
318 | } | |
319 | ||
4be44fcd | 320 | end: |
1da177e4 | 321 | if (result) |
cece9296 | 322 | printk(KERN_WARNING PREFIX |
63a1a765 RW |
323 | "Device [%s] failed to transition to %s\n", |
324 | device->pnp.bus_id, state_string(state)); | |
5e32132b SL |
325 | else { |
326 | device->power.state = state; | |
4be44fcd | 327 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
63a1a765 RW |
328 | "Device [%s] transitioned to %s\n", |
329 | device->pnp.bus_id, state_string(state))); | |
5e32132b | 330 | } |
1da177e4 | 331 | |
d550d98d | 332 | return result; |
1da177e4 | 333 | } |
1da177e4 | 334 | |
25eed407 RW |
335 | |
336 | int acpi_bus_set_power(acpi_handle handle, int state) | |
337 | { | |
338 | struct acpi_device *device; | |
339 | int result; | |
340 | ||
341 | result = acpi_bus_get_device(handle, &device); | |
342 | if (result) | |
343 | return result; | |
344 | ||
345 | if (!device->flags.power_manageable) { | |
346 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
347 | "Device [%s] is not power manageable\n", | |
348 | dev_name(&device->dev))); | |
349 | return -ENODEV; | |
350 | } | |
351 | ||
25eed407 RW |
352 | return __acpi_bus_set_power(device, state); |
353 | } | |
4be44fcd | 354 | EXPORT_SYMBOL(acpi_bus_set_power); |
1da177e4 | 355 | |
ade3e7fe RW |
356 | |
357 | int acpi_bus_init_power(struct acpi_device *device) | |
358 | { | |
359 | int state; | |
360 | int result; | |
361 | ||
362 | if (!device) | |
363 | return -EINVAL; | |
364 | ||
365 | device->power.state = ACPI_STATE_UNKNOWN; | |
366 | ||
367 | result = __acpi_bus_get_power(device, &state); | |
368 | if (result) | |
369 | return result; | |
370 | ||
371 | if (device->power.flags.power_resources) | |
372 | result = acpi_power_on_resources(device, state); | |
373 | ||
374 | if (!result) | |
375 | device->power.state = state; | |
376 | ||
377 | return result; | |
378 | } | |
379 | ||
380 | ||
25eed407 RW |
381 | int acpi_bus_update_power(acpi_handle handle, int *state_p) |
382 | { | |
383 | struct acpi_device *device; | |
384 | int state; | |
385 | int result; | |
386 | ||
387 | result = acpi_bus_get_device(handle, &device); | |
388 | if (result) | |
389 | return result; | |
390 | ||
391 | result = __acpi_bus_get_power(device, &state); | |
392 | if (result) | |
393 | return result; | |
394 | ||
395 | result = __acpi_bus_set_power(device, state); | |
396 | if (!result && state_p) | |
397 | *state_p = state; | |
398 | ||
399 | return result; | |
400 | } | |
401 | EXPORT_SYMBOL_GPL(acpi_bus_update_power); | |
402 | ||
403 | ||
3737b2b1 RW |
404 | bool acpi_bus_power_manageable(acpi_handle handle) |
405 | { | |
406 | struct acpi_device *device; | |
407 | int result; | |
408 | ||
409 | result = acpi_bus_get_device(handle, &device); | |
410 | return result ? false : device->flags.power_manageable; | |
411 | } | |
412 | ||
413 | EXPORT_SYMBOL(acpi_bus_power_manageable); | |
414 | ||
eb9d0fe4 RW |
415 | bool acpi_bus_can_wakeup(acpi_handle handle) |
416 | { | |
417 | struct acpi_device *device; | |
418 | int result; | |
419 | ||
420 | result = acpi_bus_get_device(handle, &device); | |
421 | return result ? false : device->wakeup.flags.valid; | |
422 | } | |
423 | ||
424 | EXPORT_SYMBOL(acpi_bus_can_wakeup); | |
425 | ||
70023de8 SL |
426 | static void acpi_print_osc_error(acpi_handle handle, |
427 | struct acpi_osc_context *context, char *error) | |
428 | { | |
429 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER}; | |
430 | int i; | |
431 | ||
432 | if (ACPI_FAILURE(acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer))) | |
433 | printk(KERN_DEBUG "%s\n", error); | |
434 | else { | |
435 | printk(KERN_DEBUG "%s:%s\n", (char *)buffer.pointer, error); | |
436 | kfree(buffer.pointer); | |
437 | } | |
438 | printk(KERN_DEBUG"_OSC request data:"); | |
439 | for (i = 0; i < context->cap.length; i += sizeof(u32)) | |
440 | printk("%x ", *((u32 *)(context->cap.pointer + i))); | |
441 | printk("\n"); | |
442 | } | |
443 | ||
70023de8 SL |
444 | static acpi_status acpi_str_to_uuid(char *str, u8 *uuid) |
445 | { | |
446 | int i; | |
447 | static int opc_map_to_uuid[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21, | |
448 | 24, 26, 28, 30, 32, 34}; | |
449 | ||
450 | if (strlen(str) != 36) | |
451 | return AE_BAD_PARAMETER; | |
452 | for (i = 0; i < 36; i++) { | |
453 | if (i == 8 || i == 13 || i == 18 || i == 23) { | |
454 | if (str[i] != '-') | |
455 | return AE_BAD_PARAMETER; | |
456 | } else if (!isxdigit(str[i])) | |
457 | return AE_BAD_PARAMETER; | |
458 | } | |
459 | for (i = 0; i < 16; i++) { | |
965fd9e9 AS |
460 | uuid[i] = hex_to_bin(str[opc_map_to_uuid[i]]) << 4; |
461 | uuid[i] |= hex_to_bin(str[opc_map_to_uuid[i] + 1]); | |
70023de8 SL |
462 | } |
463 | return AE_OK; | |
464 | } | |
465 | ||
466 | acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context) | |
467 | { | |
468 | acpi_status status; | |
469 | struct acpi_object_list input; | |
470 | union acpi_object in_params[4]; | |
471 | union acpi_object *out_obj; | |
472 | u8 uuid[16]; | |
473 | u32 errors; | |
9dc130fc | 474 | struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL}; |
70023de8 SL |
475 | |
476 | if (!context) | |
477 | return AE_ERROR; | |
478 | if (ACPI_FAILURE(acpi_str_to_uuid(context->uuid_str, uuid))) | |
479 | return AE_ERROR; | |
480 | context->ret.length = ACPI_ALLOCATE_BUFFER; | |
481 | context->ret.pointer = NULL; | |
482 | ||
483 | /* Setting up input parameters */ | |
484 | input.count = 4; | |
485 | input.pointer = in_params; | |
486 | in_params[0].type = ACPI_TYPE_BUFFER; | |
487 | in_params[0].buffer.length = 16; | |
488 | in_params[0].buffer.pointer = uuid; | |
489 | in_params[1].type = ACPI_TYPE_INTEGER; | |
490 | in_params[1].integer.value = context->rev; | |
491 | in_params[2].type = ACPI_TYPE_INTEGER; | |
492 | in_params[2].integer.value = context->cap.length/sizeof(u32); | |
493 | in_params[3].type = ACPI_TYPE_BUFFER; | |
494 | in_params[3].buffer.length = context->cap.length; | |
495 | in_params[3].buffer.pointer = context->cap.pointer; | |
496 | ||
9dc130fc | 497 | status = acpi_evaluate_object(handle, "_OSC", &input, &output); |
70023de8 SL |
498 | if (ACPI_FAILURE(status)) |
499 | return status; | |
500 | ||
9dc130fc | 501 | if (!output.length) |
70023de8 SL |
502 | return AE_NULL_OBJECT; |
503 | ||
9dc130fc SL |
504 | out_obj = output.pointer; |
505 | if (out_obj->type != ACPI_TYPE_BUFFER | |
506 | || out_obj->buffer.length != context->cap.length) { | |
70023de8 SL |
507 | acpi_print_osc_error(handle, context, |
508 | "_OSC evaluation returned wrong type"); | |
509 | status = AE_TYPE; | |
510 | goto out_kfree; | |
511 | } | |
512 | /* Need to ignore the bit0 in result code */ | |
513 | errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0); | |
514 | if (errors) { | |
515 | if (errors & OSC_REQUEST_ERROR) | |
516 | acpi_print_osc_error(handle, context, | |
517 | "_OSC request failed"); | |
518 | if (errors & OSC_INVALID_UUID_ERROR) | |
519 | acpi_print_osc_error(handle, context, | |
520 | "_OSC invalid UUID"); | |
521 | if (errors & OSC_INVALID_REVISION_ERROR) | |
522 | acpi_print_osc_error(handle, context, | |
523 | "_OSC invalid revision"); | |
524 | if (errors & OSC_CAPABILITIES_MASK_ERROR) { | |
525 | if (((u32 *)context->cap.pointer)[OSC_QUERY_TYPE] | |
526 | & OSC_QUERY_ENABLE) | |
527 | goto out_success; | |
528 | status = AE_SUPPORT; | |
529 | goto out_kfree; | |
530 | } | |
531 | status = AE_ERROR; | |
532 | goto out_kfree; | |
533 | } | |
534 | out_success: | |
9dc130fc SL |
535 | context->ret.length = out_obj->buffer.length; |
536 | context->ret.pointer = kmalloc(context->ret.length, GFP_KERNEL); | |
537 | if (!context->ret.pointer) { | |
538 | status = AE_NO_MEMORY; | |
539 | goto out_kfree; | |
540 | } | |
541 | memcpy(context->ret.pointer, out_obj->buffer.pointer, | |
542 | context->ret.length); | |
543 | status = AE_OK; | |
70023de8 SL |
544 | |
545 | out_kfree: | |
9dc130fc SL |
546 | kfree(output.pointer); |
547 | if (status != AE_OK) | |
548 | context->ret.pointer = NULL; | |
70023de8 SL |
549 | return status; |
550 | } | |
551 | EXPORT_SYMBOL(acpi_run_osc); | |
552 | ||
eccddd32 | 553 | bool osc_sb_apei_support_acked; |
3563ff96 SL |
554 | static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48"; |
555 | static void acpi_bus_osc_support(void) | |
556 | { | |
557 | u32 capbuf[2]; | |
558 | struct acpi_osc_context context = { | |
559 | .uuid_str = sb_uuid_str, | |
560 | .rev = 1, | |
561 | .cap.length = 8, | |
562 | .cap.pointer = capbuf, | |
563 | }; | |
564 | acpi_handle handle; | |
565 | ||
566 | capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE; | |
567 | capbuf[OSC_SUPPORT_TYPE] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */ | |
6a4e2b75 ZY |
568 | #if defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) ||\ |
569 | defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE) | |
3563ff96 SL |
570 | capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PAD_SUPPORT; |
571 | #endif | |
6a4e2b75 ZY |
572 | |
573 | #if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE) | |
574 | capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PPC_OST_SUPPORT; | |
575 | #endif | |
eccddd32 | 576 | |
c2f4191a TK |
577 | #ifdef ACPI_HOTPLUG_OST |
578 | capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_HOTPLUG_OST_SUPPORT; | |
579 | #endif | |
580 | ||
eccddd32 HY |
581 | if (!ghes_disable) |
582 | capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_APEI_SUPPORT; | |
3563ff96 SL |
583 | if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle))) |
584 | return; | |
eccddd32 HY |
585 | if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) { |
586 | u32 *capbuf_ret = context.ret.pointer; | |
587 | if (context.ret.length > OSC_SUPPORT_TYPE) | |
588 | osc_sb_apei_support_acked = | |
589 | capbuf_ret[OSC_SUPPORT_TYPE] & OSC_SB_APEI_SUPPORT; | |
3563ff96 | 590 | kfree(context.ret.pointer); |
eccddd32 HY |
591 | } |
592 | /* do we need to check other returned cap? Sounds no */ | |
3563ff96 SL |
593 | } |
594 | ||
1da177e4 LT |
595 | /* -------------------------------------------------------------------------- |
596 | Event Management | |
597 | -------------------------------------------------------------------------- */ | |
598 | ||
14e04fb3 | 599 | #ifdef CONFIG_ACPI_PROC_EVENT |
1da177e4 LT |
600 | static DEFINE_SPINLOCK(acpi_bus_event_lock); |
601 | ||
602 | LIST_HEAD(acpi_bus_event_list); | |
603 | DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue); | |
604 | ||
4be44fcd | 605 | extern int event_is_open; |
1da177e4 | 606 | |
8db85d4c | 607 | int acpi_bus_generate_proc_event4(const char *device_class, const char *bus_id, u8 type, int data) |
1da177e4 | 608 | { |
8db85d4c | 609 | struct acpi_bus_event *event; |
4be44fcd | 610 | unsigned long flags = 0; |
1da177e4 | 611 | |
1da177e4 LT |
612 | /* drop event on the floor if no one's listening */ |
613 | if (!event_is_open) | |
d550d98d | 614 | return 0; |
1da177e4 | 615 | |
5cc4a0f6 | 616 | event = kzalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC); |
1da177e4 | 617 | if (!event) |
d550d98d | 618 | return -ENOMEM; |
1da177e4 | 619 | |
8db85d4c AS |
620 | strcpy(event->device_class, device_class); |
621 | strcpy(event->bus_id, bus_id); | |
1da177e4 LT |
622 | event->type = type; |
623 | event->data = data; | |
624 | ||
625 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
626 | list_add_tail(&event->node, &acpi_bus_event_list); | |
627 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); | |
628 | ||
629 | wake_up_interruptible(&acpi_bus_event_queue); | |
630 | ||
d550d98d | 631 | return 0; |
8db85d4c AS |
632 | |
633 | } | |
634 | ||
635 | EXPORT_SYMBOL_GPL(acpi_bus_generate_proc_event4); | |
636 | ||
637 | int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data) | |
638 | { | |
639 | if (!device) | |
640 | return -EINVAL; | |
641 | return acpi_bus_generate_proc_event4(device->pnp.device_class, | |
642 | device->pnp.bus_id, type, data); | |
1da177e4 | 643 | } |
4be44fcd | 644 | |
14e04fb3 | 645 | EXPORT_SYMBOL(acpi_bus_generate_proc_event); |
1da177e4 | 646 | |
4be44fcd | 647 | int acpi_bus_receive_event(struct acpi_bus_event *event) |
1da177e4 | 648 | { |
4be44fcd LB |
649 | unsigned long flags = 0; |
650 | struct acpi_bus_event *entry = NULL; | |
1da177e4 LT |
651 | |
652 | DECLARE_WAITQUEUE(wait, current); | |
653 | ||
1da177e4 LT |
654 | |
655 | if (!event) | |
d550d98d | 656 | return -EINVAL; |
1da177e4 LT |
657 | |
658 | if (list_empty(&acpi_bus_event_list)) { | |
659 | ||
660 | set_current_state(TASK_INTERRUPTIBLE); | |
661 | add_wait_queue(&acpi_bus_event_queue, &wait); | |
662 | ||
663 | if (list_empty(&acpi_bus_event_list)) | |
664 | schedule(); | |
665 | ||
666 | remove_wait_queue(&acpi_bus_event_queue, &wait); | |
667 | set_current_state(TASK_RUNNING); | |
668 | ||
669 | if (signal_pending(current)) | |
d550d98d | 670 | return -ERESTARTSYS; |
1da177e4 LT |
671 | } |
672 | ||
673 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
f0a37e00 CE |
674 | if (!list_empty(&acpi_bus_event_list)) { |
675 | entry = list_entry(acpi_bus_event_list.next, | |
676 | struct acpi_bus_event, node); | |
1da177e4 | 677 | list_del(&entry->node); |
f0a37e00 | 678 | } |
1da177e4 LT |
679 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); |
680 | ||
681 | if (!entry) | |
d550d98d | 682 | return -ENODEV; |
1da177e4 LT |
683 | |
684 | memcpy(event, entry, sizeof(struct acpi_bus_event)); | |
685 | ||
686 | kfree(entry); | |
687 | ||
d550d98d | 688 | return 0; |
1da177e4 | 689 | } |
1da177e4 | 690 | |
14e04fb3 | 691 | #endif /* CONFIG_ACPI_PROC_EVENT */ |
1da177e4 LT |
692 | |
693 | /* -------------------------------------------------------------------------- | |
694 | Notification Handling | |
695 | -------------------------------------------------------------------------- */ | |
696 | ||
ff754e2e | 697 | static void acpi_bus_check_device(acpi_handle handle) |
1da177e4 | 698 | { |
ff754e2e | 699 | struct acpi_device *device; |
cdd5b8ca | 700 | acpi_status status; |
1da177e4 LT |
701 | struct acpi_device_status old_status; |
702 | ||
ff754e2e BH |
703 | if (acpi_bus_get_device(handle, &device)) |
704 | return; | |
1da177e4 | 705 | if (!device) |
cdd5b8ca | 706 | return; |
1da177e4 | 707 | |
1da177e4 LT |
708 | old_status = device->status; |
709 | ||
710 | /* | |
711 | * Make sure this device's parent is present before we go about | |
712 | * messing with the device. | |
713 | */ | |
714 | if (device->parent && !device->parent->status.present) { | |
715 | device->status = device->parent->status; | |
cdd5b8ca | 716 | return; |
1da177e4 LT |
717 | } |
718 | ||
719 | status = acpi_bus_get_status(device); | |
720 | if (ACPI_FAILURE(status)) | |
cdd5b8ca | 721 | return; |
1da177e4 LT |
722 | |
723 | if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status)) | |
cdd5b8ca | 724 | return; |
1da177e4 | 725 | |
1da177e4 LT |
726 | /* |
727 | * Device Insertion/Removal | |
728 | */ | |
729 | if ((device->status.present) && !(old_status.present)) { | |
730 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n")); | |
731 | /* TBD: Handle device insertion */ | |
4be44fcd | 732 | } else if (!(device->status.present) && (old_status.present)) { |
1da177e4 LT |
733 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n")); |
734 | /* TBD: Handle device removal */ | |
735 | } | |
1da177e4 LT |
736 | } |
737 | ||
ff754e2e | 738 | static void acpi_bus_check_scope(acpi_handle handle) |
1da177e4 | 739 | { |
1da177e4 | 740 | /* Status Change? */ |
ff754e2e | 741 | acpi_bus_check_device(handle); |
1da177e4 | 742 | |
1da177e4 LT |
743 | /* |
744 | * TBD: Enumerate child devices within this device's scope and | |
745 | * run acpi_bus_check_device()'s on them. | |
746 | */ | |
1da177e4 LT |
747 | } |
748 | ||
6bd00a61 SL |
749 | static BLOCKING_NOTIFIER_HEAD(acpi_bus_notify_list); |
750 | int register_acpi_bus_notifier(struct notifier_block *nb) | |
751 | { | |
752 | return blocking_notifier_chain_register(&acpi_bus_notify_list, nb); | |
753 | } | |
754 | EXPORT_SYMBOL_GPL(register_acpi_bus_notifier); | |
755 | ||
756 | void unregister_acpi_bus_notifier(struct notifier_block *nb) | |
757 | { | |
758 | blocking_notifier_chain_unregister(&acpi_bus_notify_list, nb); | |
759 | } | |
760 | EXPORT_SYMBOL_GPL(unregister_acpi_bus_notifier); | |
761 | ||
1da177e4 LT |
762 | /** |
763 | * acpi_bus_notify | |
764 | * --------------- | |
765 | * Callback for all 'system-level' device notifications (values 0x00-0x7F). | |
766 | */ | |
4be44fcd | 767 | static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) |
1da177e4 | 768 | { |
4be44fcd | 769 | struct acpi_device *device = NULL; |
6d278131 | 770 | struct acpi_driver *driver; |
1da177e4 | 771 | |
02c37bd8 BH |
772 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Notification %#02x to handle %p\n", |
773 | type, handle)); | |
774 | ||
6bd00a61 SL |
775 | blocking_notifier_call_chain(&acpi_bus_notify_list, |
776 | type, (void *)handle); | |
1da177e4 | 777 | |
1da177e4 LT |
778 | switch (type) { |
779 | ||
780 | case ACPI_NOTIFY_BUS_CHECK: | |
ff754e2e | 781 | acpi_bus_check_scope(handle); |
aafbcd16 | 782 | /* |
1da177e4 | 783 | * TBD: We'll need to outsource certain events to non-ACPI |
4be44fcd | 784 | * drivers via the device manager (device.c). |
1da177e4 LT |
785 | */ |
786 | break; | |
787 | ||
788 | case ACPI_NOTIFY_DEVICE_CHECK: | |
ff754e2e | 789 | acpi_bus_check_device(handle); |
aafbcd16 | 790 | /* |
1da177e4 | 791 | * TBD: We'll need to outsource certain events to non-ACPI |
4be44fcd | 792 | * drivers via the device manager (device.c). |
1da177e4 LT |
793 | */ |
794 | break; | |
795 | ||
796 | case ACPI_NOTIFY_DEVICE_WAKE: | |
1da177e4 LT |
797 | /* TBD */ |
798 | break; | |
799 | ||
800 | case ACPI_NOTIFY_EJECT_REQUEST: | |
1da177e4 LT |
801 | /* TBD */ |
802 | break; | |
803 | ||
804 | case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: | |
1da177e4 LT |
805 | /* TBD: Exactly what does 'light' mean? */ |
806 | break; | |
807 | ||
808 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
1da177e4 LT |
809 | /* TBD */ |
810 | break; | |
811 | ||
812 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
1da177e4 LT |
813 | /* TBD */ |
814 | break; | |
815 | ||
816 | case ACPI_NOTIFY_POWER_FAULT: | |
1da177e4 LT |
817 | /* TBD */ |
818 | break; | |
819 | ||
820 | default: | |
4be44fcd LB |
821 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
822 | "Received unknown/unsupported notification [%08x]\n", | |
823 | type)); | |
1da177e4 LT |
824 | break; |
825 | } | |
826 | ||
ff754e2e BH |
827 | acpi_bus_get_device(handle, &device); |
828 | if (device) { | |
829 | driver = device->driver; | |
830 | if (driver && driver->ops.notify && | |
831 | (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS)) | |
832 | driver->ops.notify(device, type); | |
833 | } | |
1da177e4 LT |
834 | } |
835 | ||
836 | /* -------------------------------------------------------------------------- | |
837 | Initialization/Cleanup | |
838 | -------------------------------------------------------------------------- */ | |
839 | ||
4be44fcd | 840 | static int __init acpi_bus_init_irq(void) |
1da177e4 | 841 | { |
4be44fcd LB |
842 | acpi_status status = AE_OK; |
843 | union acpi_object arg = { ACPI_TYPE_INTEGER }; | |
844 | struct acpi_object_list arg_list = { 1, &arg }; | |
845 | char *message = NULL; | |
1da177e4 | 846 | |
1da177e4 | 847 | |
aafbcd16 | 848 | /* |
1da177e4 LT |
849 | * Let the system know what interrupt model we are using by |
850 | * evaluating the \_PIC object, if exists. | |
851 | */ | |
852 | ||
853 | switch (acpi_irq_model) { | |
854 | case ACPI_IRQ_MODEL_PIC: | |
855 | message = "PIC"; | |
856 | break; | |
857 | case ACPI_IRQ_MODEL_IOAPIC: | |
858 | message = "IOAPIC"; | |
859 | break; | |
860 | case ACPI_IRQ_MODEL_IOSAPIC: | |
861 | message = "IOSAPIC"; | |
862 | break; | |
3948ec94 JK |
863 | case ACPI_IRQ_MODEL_PLATFORM: |
864 | message = "platform specific model"; | |
865 | break; | |
1da177e4 LT |
866 | default: |
867 | printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n"); | |
d550d98d | 868 | return -ENODEV; |
1da177e4 LT |
869 | } |
870 | ||
871 | printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message); | |
872 | ||
873 | arg.integer.value = acpi_irq_model; | |
874 | ||
875 | status = acpi_evaluate_object(NULL, "\\_PIC", &arg_list, NULL); | |
876 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { | |
a6fc6720 | 877 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC")); |
d550d98d | 878 | return -ENODEV; |
1da177e4 LT |
879 | } |
880 | ||
d550d98d | 881 | return 0; |
1da177e4 LT |
882 | } |
883 | ||
67a119f9 | 884 | u8 acpi_gbl_permanent_mmap; |
ad71860a AS |
885 | |
886 | ||
4be44fcd | 887 | void __init acpi_early_init(void) |
1da177e4 | 888 | { |
4be44fcd | 889 | acpi_status status = AE_OK; |
1da177e4 LT |
890 | |
891 | if (acpi_disabled) | |
d550d98d | 892 | return; |
1da177e4 | 893 | |
61686124 BM |
894 | printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION); |
895 | ||
1da177e4 LT |
896 | /* enable workarounds, unless strict ACPI spec. compliance */ |
897 | if (!acpi_strict) | |
898 | acpi_gbl_enable_interpreter_slack = TRUE; | |
899 | ||
ad71860a AS |
900 | acpi_gbl_permanent_mmap = 1; |
901 | ||
aa2110cb LM |
902 | /* |
903 | * If the machine falls into the DMI check table, | |
904 | * DSDT will be copied to memory | |
905 | */ | |
906 | dmi_check_system(dsdt_dmi_table); | |
907 | ||
ad71860a AS |
908 | status = acpi_reallocate_root_table(); |
909 | if (ACPI_FAILURE(status)) { | |
910 | printk(KERN_ERR PREFIX | |
911 | "Unable to reallocate ACPI tables\n"); | |
912 | goto error0; | |
913 | } | |
914 | ||
1da177e4 LT |
915 | status = acpi_initialize_subsystem(); |
916 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
917 | printk(KERN_ERR PREFIX |
918 | "Unable to initialize the ACPI Interpreter\n"); | |
1da177e4 LT |
919 | goto error0; |
920 | } | |
921 | ||
922 | status = acpi_load_tables(); | |
923 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
924 | printk(KERN_ERR PREFIX |
925 | "Unable to load the System Description Tables\n"); | |
1da177e4 LT |
926 | goto error0; |
927 | } | |
928 | ||
1da177e4 LT |
929 | #ifdef CONFIG_X86 |
930 | if (!acpi_ioapic) { | |
1da177e4 | 931 | /* compatible (0) means level (3) */ |
5f3b1a8b AS |
932 | if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) { |
933 | acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK; | |
934 | acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL; | |
935 | } | |
1da177e4 | 936 | /* Set PIC-mode SCI trigger type */ |
cee324b1 | 937 | acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt, |
5f3b1a8b | 938 | (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2); |
1da177e4 | 939 | } else { |
1da177e4 | 940 | /* |
cee324b1 | 941 | * now that acpi_gbl_FADT is initialized, |
1da177e4 LT |
942 | * update it with result from INT_SRC_OVR parsing |
943 | */ | |
cee324b1 | 944 | acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi; |
1da177e4 LT |
945 | } |
946 | #endif | |
947 | ||
4505a201 | 948 | status = acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE); |
1da177e4 LT |
949 | if (ACPI_FAILURE(status)) { |
950 | printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); | |
951 | goto error0; | |
952 | } | |
953 | ||
d550d98d | 954 | return; |
1da177e4 | 955 | |
4be44fcd | 956 | error0: |
1da177e4 | 957 | disable_acpi(); |
d550d98d | 958 | return; |
1da177e4 LT |
959 | } |
960 | ||
4be44fcd | 961 | static int __init acpi_bus_init(void) |
1da177e4 | 962 | { |
4be44fcd LB |
963 | int result = 0; |
964 | acpi_status status = AE_OK; | |
965 | extern acpi_status acpi_os_initialize1(void); | |
1da177e4 | 966 | |
176f9c18 | 967 | acpi_os_initialize1(); |
1da177e4 | 968 | |
4505a201 | 969 | status = acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE); |
1da177e4 | 970 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
971 | printk(KERN_ERR PREFIX |
972 | "Unable to start the ACPI Interpreter\n"); | |
1da177e4 LT |
973 | goto error1; |
974 | } | |
975 | ||
1da177e4 LT |
976 | /* |
977 | * ACPI 2.0 requires the EC driver to be loaded and work before | |
978 | * the EC device is found in the namespace (i.e. before acpi_initialize_objects() | |
979 | * is called). | |
980 | * | |
aafbcd16 | 981 | * This is accomplished by looking for the ECDT table, and getting |
1da177e4 LT |
982 | * the EC parameters out of that. |
983 | */ | |
984 | status = acpi_ec_ecdt_probe(); | |
985 | /* Ignore result. Not having an ECDT is not fatal. */ | |
1da177e4 | 986 | |
3563ff96 SL |
987 | acpi_bus_osc_support(); |
988 | ||
1da177e4 LT |
989 | status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); |
990 | if (ACPI_FAILURE(status)) { | |
991 | printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); | |
992 | goto error1; | |
993 | } | |
994 | ||
b1d248d9 ZR |
995 | /* |
996 | * _PDC control method may load dynamic SSDT tables, | |
997 | * and we need to install the table handler before that. | |
998 | */ | |
999 | acpi_sysfs_init(); | |
1000 | ||
78f16996 AC |
1001 | acpi_early_processor_set_pdc(); |
1002 | ||
455c8793 ZY |
1003 | /* |
1004 | * Maybe EC region is required at bus_scan/acpi_get_devices. So it | |
1005 | * is necessary to enable it as early as possible. | |
1006 | */ | |
1007 | acpi_boot_ec_enable(); | |
1008 | ||
1da177e4 LT |
1009 | printk(KERN_INFO PREFIX "Interpreter enabled\n"); |
1010 | ||
aafbcd16 AS |
1011 | /* Initialize sleep structures */ |
1012 | acpi_sleep_init(); | |
1013 | ||
1da177e4 LT |
1014 | /* |
1015 | * Get the system interrupt model and evaluate \_PIC. | |
1016 | */ | |
1017 | result = acpi_bus_init_irq(); | |
1018 | if (result) | |
1019 | goto error1; | |
1020 | ||
1021 | /* | |
1022 | * Register the for all standard device notifications. | |
1023 | */ | |
4be44fcd LB |
1024 | status = |
1025 | acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, | |
1026 | &acpi_bus_notify, NULL); | |
1da177e4 | 1027 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
1028 | printk(KERN_ERR PREFIX |
1029 | "Unable to register for device notifications\n"); | |
1da177e4 LT |
1030 | goto error1; |
1031 | } | |
1032 | ||
1033 | /* | |
1034 | * Create the top ACPI proc directory | |
1035 | */ | |
1036 | acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); | |
1037 | ||
d550d98d | 1038 | return 0; |
1da177e4 LT |
1039 | |
1040 | /* Mimic structured exception handling */ | |
4be44fcd | 1041 | error1: |
1da177e4 | 1042 | acpi_terminate(); |
d550d98d | 1043 | return -ENODEV; |
1da177e4 LT |
1044 | } |
1045 | ||
99e0d2fc | 1046 | struct kobject *acpi_kobj; |
f2d4753f | 1047 | EXPORT_SYMBOL_GPL(acpi_kobj); |
1da177e4 | 1048 | |
4be44fcd | 1049 | static int __init acpi_init(void) |
1da177e4 | 1050 | { |
6831c6ed | 1051 | int result; |
1da177e4 | 1052 | |
1da177e4 LT |
1053 | if (acpi_disabled) { |
1054 | printk(KERN_INFO PREFIX "Interpreter disabled.\n"); | |
d550d98d | 1055 | return -ENODEV; |
1da177e4 LT |
1056 | } |
1057 | ||
f62ed9e3 | 1058 | acpi_kobj = kobject_create_and_add("acpi", firmware_kobj); |
99e0d2fc | 1059 | if (!acpi_kobj) { |
96b2dd1f | 1060 | printk(KERN_WARNING "%s: kset create error\n", __func__); |
99e0d2fc GKH |
1061 | acpi_kobj = NULL; |
1062 | } | |
1da177e4 | 1063 | |
0e46517d | 1064 | init_acpi_device_notify(); |
1da177e4 | 1065 | result = acpi_bus_init(); |
6831c6ed | 1066 | if (result) { |
1da177e4 | 1067 | disable_acpi(); |
81d0273d | 1068 | return result; |
6831c6ed | 1069 | } |
81d0273d | 1070 | |
6831c6ed | 1071 | pci_mmcfg_late_init(); |
e747f274 | 1072 | acpi_scan_init(); |
a5f820fe | 1073 | acpi_ec_init(); |
a25ee920 | 1074 | acpi_debugfs_init(); |
9cee43e0 | 1075 | acpi_sleep_proc_init(); |
201b8c65 | 1076 | acpi_wakeup_device_init(); |
6831c6ed | 1077 | return 0; |
1da177e4 LT |
1078 | } |
1079 | ||
1080 | subsys_initcall(acpi_init); |