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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> | |
28 | #include <linux/kernel.h> | |
29 | #include <linux/list.h> | |
30 | #include <linux/sched.h> | |
31 | #include <linux/pm.h> | |
32 | #include <linux/device.h> | |
33 | #include <linux/proc_fs.h> | |
34 | #include <linux/acpi.h> | |
35 | #include <linux/slab.h> | |
36 | #ifdef CONFIG_X86 | |
37 | #include <asm/mpspec.h> | |
38 | #endif | |
39 | #include <linux/pci.h> | |
40 | #include <acpi/apei.h> | |
41 | #include <linux/dmi.h> | |
42 | #include <linux/suspend.h> | |
43 | ||
44 | #include "internal.h" | |
45 | ||
46 | #define _COMPONENT ACPI_BUS_COMPONENT | |
47 | ACPI_MODULE_NAME("bus"); | |
48 | ||
49 | struct acpi_device *acpi_root; | |
50 | struct proc_dir_entry *acpi_root_dir; | |
51 | EXPORT_SYMBOL(acpi_root_dir); | |
52 | ||
53 | #define STRUCT_TO_INT(s) (*((int*)&s)) | |
54 | ||
55 | ||
56 | #ifdef CONFIG_X86 | |
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 | /* | |
67 | * Invoke DSDT corruption work-around on all Toshiba Satellite. | |
68 | * https://bugzilla.kernel.org/show_bug.cgi?id=14679 | |
69 | */ | |
70 | { | |
71 | .callback = set_copy_dsdt, | |
72 | .ident = "TOSHIBA Satellite", | |
73 | .matches = { | |
74 | DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), | |
75 | DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"), | |
76 | }, | |
77 | }, | |
78 | {} | |
79 | }; | |
80 | #else | |
81 | static struct dmi_system_id dsdt_dmi_table[] __initdata = { | |
82 | {} | |
83 | }; | |
84 | #endif | |
85 | ||
86 | /* -------------------------------------------------------------------------- | |
87 | Device Management | |
88 | -------------------------------------------------------------------------- */ | |
89 | ||
90 | acpi_status acpi_bus_get_status_handle(acpi_handle handle, | |
91 | unsigned long long *sta) | |
92 | { | |
93 | acpi_status status; | |
94 | ||
95 | status = acpi_evaluate_integer(handle, "_STA", NULL, sta); | |
96 | if (ACPI_SUCCESS(status)) | |
97 | return AE_OK; | |
98 | ||
99 | if (status == AE_NOT_FOUND) { | |
100 | *sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | | |
101 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; | |
102 | return AE_OK; | |
103 | } | |
104 | return status; | |
105 | } | |
106 | ||
107 | int acpi_bus_get_status(struct acpi_device *device) | |
108 | { | |
109 | acpi_status status; | |
110 | unsigned long long sta; | |
111 | ||
112 | status = acpi_bus_get_status_handle(device->handle, &sta); | |
113 | if (ACPI_FAILURE(status)) | |
114 | return -ENODEV; | |
115 | ||
116 | STRUCT_TO_INT(device->status) = (int) sta; | |
117 | ||
118 | if (device->status.functional && !device->status.present) { | |
119 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: " | |
120 | "functional but not present;\n", | |
121 | device->pnp.bus_id, | |
122 | (u32) STRUCT_TO_INT(device->status))); | |
123 | } | |
124 | ||
125 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n", | |
126 | device->pnp.bus_id, | |
127 | (u32) STRUCT_TO_INT(device->status))); | |
128 | return 0; | |
129 | } | |
130 | EXPORT_SYMBOL(acpi_bus_get_status); | |
131 | ||
132 | void acpi_bus_private_data_handler(acpi_handle handle, | |
133 | void *context) | |
134 | { | |
135 | return; | |
136 | } | |
137 | EXPORT_SYMBOL(acpi_bus_private_data_handler); | |
138 | ||
139 | int acpi_bus_get_private_data(acpi_handle handle, void **data) | |
140 | { | |
141 | acpi_status status; | |
142 | ||
143 | if (!*data) | |
144 | return -EINVAL; | |
145 | ||
146 | status = acpi_get_data(handle, acpi_bus_private_data_handler, data); | |
147 | if (ACPI_FAILURE(status) || !*data) { | |
148 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", | |
149 | handle)); | |
150 | return -ENODEV; | |
151 | } | |
152 | ||
153 | return 0; | |
154 | } | |
155 | EXPORT_SYMBOL(acpi_bus_get_private_data); | |
156 | ||
157 | static void acpi_print_osc_error(acpi_handle handle, | |
158 | struct acpi_osc_context *context, char *error) | |
159 | { | |
160 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER}; | |
161 | int i; | |
162 | ||
163 | if (ACPI_FAILURE(acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer))) | |
164 | printk(KERN_DEBUG "%s\n", error); | |
165 | else { | |
166 | printk(KERN_DEBUG "%s:%s\n", (char *)buffer.pointer, error); | |
167 | kfree(buffer.pointer); | |
168 | } | |
169 | printk(KERN_DEBUG"_OSC request data:"); | |
170 | for (i = 0; i < context->cap.length; i += sizeof(u32)) | |
171 | printk("%x ", *((u32 *)(context->cap.pointer + i))); | |
172 | printk("\n"); | |
173 | } | |
174 | ||
175 | acpi_status acpi_str_to_uuid(char *str, u8 *uuid) | |
176 | { | |
177 | int i; | |
178 | static int opc_map_to_uuid[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21, | |
179 | 24, 26, 28, 30, 32, 34}; | |
180 | ||
181 | if (strlen(str) != 36) | |
182 | return AE_BAD_PARAMETER; | |
183 | for (i = 0; i < 36; i++) { | |
184 | if (i == 8 || i == 13 || i == 18 || i == 23) { | |
185 | if (str[i] != '-') | |
186 | return AE_BAD_PARAMETER; | |
187 | } else if (!isxdigit(str[i])) | |
188 | return AE_BAD_PARAMETER; | |
189 | } | |
190 | for (i = 0; i < 16; i++) { | |
191 | uuid[i] = hex_to_bin(str[opc_map_to_uuid[i]]) << 4; | |
192 | uuid[i] |= hex_to_bin(str[opc_map_to_uuid[i] + 1]); | |
193 | } | |
194 | return AE_OK; | |
195 | } | |
196 | EXPORT_SYMBOL_GPL(acpi_str_to_uuid); | |
197 | ||
198 | acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context) | |
199 | { | |
200 | acpi_status status; | |
201 | struct acpi_object_list input; | |
202 | union acpi_object in_params[4]; | |
203 | union acpi_object *out_obj; | |
204 | u8 uuid[16]; | |
205 | u32 errors; | |
206 | struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL}; | |
207 | ||
208 | if (!context) | |
209 | return AE_ERROR; | |
210 | if (ACPI_FAILURE(acpi_str_to_uuid(context->uuid_str, uuid))) | |
211 | return AE_ERROR; | |
212 | context->ret.length = ACPI_ALLOCATE_BUFFER; | |
213 | context->ret.pointer = NULL; | |
214 | ||
215 | /* Setting up input parameters */ | |
216 | input.count = 4; | |
217 | input.pointer = in_params; | |
218 | in_params[0].type = ACPI_TYPE_BUFFER; | |
219 | in_params[0].buffer.length = 16; | |
220 | in_params[0].buffer.pointer = uuid; | |
221 | in_params[1].type = ACPI_TYPE_INTEGER; | |
222 | in_params[1].integer.value = context->rev; | |
223 | in_params[2].type = ACPI_TYPE_INTEGER; | |
224 | in_params[2].integer.value = context->cap.length/sizeof(u32); | |
225 | in_params[3].type = ACPI_TYPE_BUFFER; | |
226 | in_params[3].buffer.length = context->cap.length; | |
227 | in_params[3].buffer.pointer = context->cap.pointer; | |
228 | ||
229 | status = acpi_evaluate_object(handle, "_OSC", &input, &output); | |
230 | if (ACPI_FAILURE(status)) | |
231 | return status; | |
232 | ||
233 | if (!output.length) | |
234 | return AE_NULL_OBJECT; | |
235 | ||
236 | out_obj = output.pointer; | |
237 | if (out_obj->type != ACPI_TYPE_BUFFER | |
238 | || out_obj->buffer.length != context->cap.length) { | |
239 | acpi_print_osc_error(handle, context, | |
240 | "_OSC evaluation returned wrong type"); | |
241 | status = AE_TYPE; | |
242 | goto out_kfree; | |
243 | } | |
244 | /* Need to ignore the bit0 in result code */ | |
245 | errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0); | |
246 | if (errors) { | |
247 | if (errors & OSC_REQUEST_ERROR) | |
248 | acpi_print_osc_error(handle, context, | |
249 | "_OSC request failed"); | |
250 | if (errors & OSC_INVALID_UUID_ERROR) | |
251 | acpi_print_osc_error(handle, context, | |
252 | "_OSC invalid UUID"); | |
253 | if (errors & OSC_INVALID_REVISION_ERROR) | |
254 | acpi_print_osc_error(handle, context, | |
255 | "_OSC invalid revision"); | |
256 | if (errors & OSC_CAPABILITIES_MASK_ERROR) { | |
257 | if (((u32 *)context->cap.pointer)[OSC_QUERY_DWORD] | |
258 | & OSC_QUERY_ENABLE) | |
259 | goto out_success; | |
260 | status = AE_SUPPORT; | |
261 | goto out_kfree; | |
262 | } | |
263 | status = AE_ERROR; | |
264 | goto out_kfree; | |
265 | } | |
266 | out_success: | |
267 | context->ret.length = out_obj->buffer.length; | |
268 | context->ret.pointer = kmemdup(out_obj->buffer.pointer, | |
269 | context->ret.length, GFP_KERNEL); | |
270 | if (!context->ret.pointer) { | |
271 | status = AE_NO_MEMORY; | |
272 | goto out_kfree; | |
273 | } | |
274 | status = AE_OK; | |
275 | ||
276 | out_kfree: | |
277 | kfree(output.pointer); | |
278 | if (status != AE_OK) | |
279 | context->ret.pointer = NULL; | |
280 | return status; | |
281 | } | |
282 | EXPORT_SYMBOL(acpi_run_osc); | |
283 | ||
284 | bool osc_sb_apei_support_acked; | |
285 | static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48"; | |
286 | static void acpi_bus_osc_support(void) | |
287 | { | |
288 | u32 capbuf[2]; | |
289 | struct acpi_osc_context context = { | |
290 | .uuid_str = sb_uuid_str, | |
291 | .rev = 1, | |
292 | .cap.length = 8, | |
293 | .cap.pointer = capbuf, | |
294 | }; | |
295 | acpi_handle handle; | |
296 | ||
297 | capbuf[OSC_QUERY_DWORD] = OSC_QUERY_ENABLE; | |
298 | capbuf[OSC_SUPPORT_DWORD] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */ | |
299 | #if defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) ||\ | |
300 | defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE) | |
301 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PAD_SUPPORT; | |
302 | #endif | |
303 | ||
304 | #if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE) | |
305 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PPC_OST_SUPPORT; | |
306 | #endif | |
307 | ||
308 | #ifdef ACPI_HOTPLUG_OST | |
309 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT; | |
310 | #endif | |
311 | ||
312 | if (!ghes_disable) | |
313 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_APEI_SUPPORT; | |
314 | if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle))) | |
315 | return; | |
316 | if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) { | |
317 | u32 *capbuf_ret = context.ret.pointer; | |
318 | if (context.ret.length > OSC_SUPPORT_DWORD) | |
319 | osc_sb_apei_support_acked = | |
320 | capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_APEI_SUPPORT; | |
321 | kfree(context.ret.pointer); | |
322 | } | |
323 | /* do we need to check other returned cap? Sounds no */ | |
324 | } | |
325 | ||
326 | /* -------------------------------------------------------------------------- | |
327 | Notification Handling | |
328 | -------------------------------------------------------------------------- */ | |
329 | ||
330 | static void acpi_bus_check_device(acpi_handle handle) | |
331 | { | |
332 | struct acpi_device *device; | |
333 | acpi_status status; | |
334 | struct acpi_device_status old_status; | |
335 | ||
336 | if (acpi_bus_get_device(handle, &device)) | |
337 | return; | |
338 | if (!device) | |
339 | return; | |
340 | ||
341 | old_status = device->status; | |
342 | ||
343 | /* | |
344 | * Make sure this device's parent is present before we go about | |
345 | * messing with the device. | |
346 | */ | |
347 | if (device->parent && !device->parent->status.present) { | |
348 | device->status = device->parent->status; | |
349 | return; | |
350 | } | |
351 | ||
352 | status = acpi_bus_get_status(device); | |
353 | if (ACPI_FAILURE(status)) | |
354 | return; | |
355 | ||
356 | if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status)) | |
357 | return; | |
358 | ||
359 | /* | |
360 | * Device Insertion/Removal | |
361 | */ | |
362 | if ((device->status.present) && !(old_status.present)) { | |
363 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n")); | |
364 | /* TBD: Handle device insertion */ | |
365 | } else if (!(device->status.present) && (old_status.present)) { | |
366 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n")); | |
367 | /* TBD: Handle device removal */ | |
368 | } | |
369 | } | |
370 | ||
371 | static void acpi_bus_check_scope(acpi_handle handle) | |
372 | { | |
373 | /* Status Change? */ | |
374 | acpi_bus_check_device(handle); | |
375 | ||
376 | /* | |
377 | * TBD: Enumerate child devices within this device's scope and | |
378 | * run acpi_bus_check_device()'s on them. | |
379 | */ | |
380 | } | |
381 | ||
382 | /** | |
383 | * acpi_bus_notify | |
384 | * --------------- | |
385 | * Callback for all 'system-level' device notifications (values 0x00-0x7F). | |
386 | */ | |
387 | static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) | |
388 | { | |
389 | struct acpi_device *device = NULL; | |
390 | struct acpi_driver *driver; | |
391 | ||
392 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Notification %#02x to handle %p\n", | |
393 | type, handle)); | |
394 | ||
395 | switch (type) { | |
396 | ||
397 | case ACPI_NOTIFY_BUS_CHECK: | |
398 | acpi_bus_check_scope(handle); | |
399 | /* | |
400 | * TBD: We'll need to outsource certain events to non-ACPI | |
401 | * drivers via the device manager (device.c). | |
402 | */ | |
403 | break; | |
404 | ||
405 | case ACPI_NOTIFY_DEVICE_CHECK: | |
406 | acpi_bus_check_device(handle); | |
407 | /* | |
408 | * TBD: We'll need to outsource certain events to non-ACPI | |
409 | * drivers via the device manager (device.c). | |
410 | */ | |
411 | break; | |
412 | ||
413 | case ACPI_NOTIFY_DEVICE_WAKE: | |
414 | /* TBD */ | |
415 | break; | |
416 | ||
417 | case ACPI_NOTIFY_EJECT_REQUEST: | |
418 | /* TBD */ | |
419 | break; | |
420 | ||
421 | case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: | |
422 | /* TBD: Exactly what does 'light' mean? */ | |
423 | break; | |
424 | ||
425 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
426 | /* TBD */ | |
427 | break; | |
428 | ||
429 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
430 | /* TBD */ | |
431 | break; | |
432 | ||
433 | case ACPI_NOTIFY_POWER_FAULT: | |
434 | /* TBD */ | |
435 | break; | |
436 | ||
437 | default: | |
438 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
439 | "Received unknown/unsupported notification [%08x]\n", | |
440 | type)); | |
441 | break; | |
442 | } | |
443 | ||
444 | acpi_bus_get_device(handle, &device); | |
445 | if (device) { | |
446 | driver = device->driver; | |
447 | if (driver && driver->ops.notify && | |
448 | (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS)) | |
449 | driver->ops.notify(device, type); | |
450 | } | |
451 | } | |
452 | ||
453 | /* -------------------------------------------------------------------------- | |
454 | Initialization/Cleanup | |
455 | -------------------------------------------------------------------------- */ | |
456 | ||
457 | static int __init acpi_bus_init_irq(void) | |
458 | { | |
459 | acpi_status status; | |
460 | char *message = NULL; | |
461 | ||
462 | ||
463 | /* | |
464 | * Let the system know what interrupt model we are using by | |
465 | * evaluating the \_PIC object, if exists. | |
466 | */ | |
467 | ||
468 | switch (acpi_irq_model) { | |
469 | case ACPI_IRQ_MODEL_PIC: | |
470 | message = "PIC"; | |
471 | break; | |
472 | case ACPI_IRQ_MODEL_IOAPIC: | |
473 | message = "IOAPIC"; | |
474 | break; | |
475 | case ACPI_IRQ_MODEL_IOSAPIC: | |
476 | message = "IOSAPIC"; | |
477 | break; | |
478 | case ACPI_IRQ_MODEL_PLATFORM: | |
479 | message = "platform specific model"; | |
480 | break; | |
481 | default: | |
482 | printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n"); | |
483 | return -ENODEV; | |
484 | } | |
485 | ||
486 | printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message); | |
487 | ||
488 | status = acpi_execute_simple_method(NULL, "\\_PIC", acpi_irq_model); | |
489 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { | |
490 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC")); | |
491 | return -ENODEV; | |
492 | } | |
493 | ||
494 | return 0; | |
495 | } | |
496 | ||
497 | u8 acpi_gbl_permanent_mmap; | |
498 | ||
499 | ||
500 | void __init acpi_early_init(void) | |
501 | { | |
502 | acpi_status status; | |
503 | ||
504 | if (acpi_disabled) | |
505 | return; | |
506 | ||
507 | printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION); | |
508 | ||
509 | /* enable workarounds, unless strict ACPI spec. compliance */ | |
510 | if (!acpi_strict) | |
511 | acpi_gbl_enable_interpreter_slack = TRUE; | |
512 | ||
513 | acpi_gbl_permanent_mmap = 1; | |
514 | ||
515 | /* | |
516 | * If the machine falls into the DMI check table, | |
517 | * DSDT will be copied to memory | |
518 | */ | |
519 | dmi_check_system(dsdt_dmi_table); | |
520 | ||
521 | status = acpi_reallocate_root_table(); | |
522 | if (ACPI_FAILURE(status)) { | |
523 | printk(KERN_ERR PREFIX | |
524 | "Unable to reallocate ACPI tables\n"); | |
525 | goto error0; | |
526 | } | |
527 | ||
528 | status = acpi_initialize_subsystem(); | |
529 | if (ACPI_FAILURE(status)) { | |
530 | printk(KERN_ERR PREFIX | |
531 | "Unable to initialize the ACPI Interpreter\n"); | |
532 | goto error0; | |
533 | } | |
534 | ||
535 | status = acpi_load_tables(); | |
536 | if (ACPI_FAILURE(status)) { | |
537 | printk(KERN_ERR PREFIX | |
538 | "Unable to load the System Description Tables\n"); | |
539 | goto error0; | |
540 | } | |
541 | ||
542 | #ifdef CONFIG_X86 | |
543 | if (!acpi_ioapic) { | |
544 | /* compatible (0) means level (3) */ | |
545 | if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) { | |
546 | acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK; | |
547 | acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL; | |
548 | } | |
549 | /* Set PIC-mode SCI trigger type */ | |
550 | acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt, | |
551 | (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2); | |
552 | } else { | |
553 | /* | |
554 | * now that acpi_gbl_FADT is initialized, | |
555 | * update it with result from INT_SRC_OVR parsing | |
556 | */ | |
557 | acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi; | |
558 | } | |
559 | #endif | |
560 | ||
561 | status = acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE); | |
562 | if (ACPI_FAILURE(status)) { | |
563 | printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); | |
564 | goto error0; | |
565 | } | |
566 | ||
567 | return; | |
568 | ||
569 | error0: | |
570 | disable_acpi(); | |
571 | return; | |
572 | } | |
573 | ||
574 | static int __init acpi_bus_init(void) | |
575 | { | |
576 | int result; | |
577 | acpi_status status; | |
578 | ||
579 | acpi_os_initialize1(); | |
580 | ||
581 | status = acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE); | |
582 | if (ACPI_FAILURE(status)) { | |
583 | printk(KERN_ERR PREFIX | |
584 | "Unable to start the ACPI Interpreter\n"); | |
585 | goto error1; | |
586 | } | |
587 | ||
588 | /* | |
589 | * ACPI 2.0 requires the EC driver to be loaded and work before | |
590 | * the EC device is found in the namespace (i.e. before acpi_initialize_objects() | |
591 | * is called). | |
592 | * | |
593 | * This is accomplished by looking for the ECDT table, and getting | |
594 | * the EC parameters out of that. | |
595 | */ | |
596 | status = acpi_ec_ecdt_probe(); | |
597 | /* Ignore result. Not having an ECDT is not fatal. */ | |
598 | ||
599 | status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); | |
600 | if (ACPI_FAILURE(status)) { | |
601 | printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); | |
602 | goto error1; | |
603 | } | |
604 | ||
605 | /* | |
606 | * _OSC method may exist in module level code, | |
607 | * so it must be run after ACPI_FULL_INITIALIZATION | |
608 | */ | |
609 | acpi_bus_osc_support(); | |
610 | ||
611 | /* | |
612 | * _PDC control method may load dynamic SSDT tables, | |
613 | * and we need to install the table handler before that. | |
614 | */ | |
615 | acpi_sysfs_init(); | |
616 | ||
617 | acpi_early_processor_set_pdc(); | |
618 | ||
619 | /* | |
620 | * Maybe EC region is required at bus_scan/acpi_get_devices. So it | |
621 | * is necessary to enable it as early as possible. | |
622 | */ | |
623 | acpi_boot_ec_enable(); | |
624 | ||
625 | printk(KERN_INFO PREFIX "Interpreter enabled\n"); | |
626 | ||
627 | /* Initialize sleep structures */ | |
628 | acpi_sleep_init(); | |
629 | ||
630 | /* | |
631 | * Get the system interrupt model and evaluate \_PIC. | |
632 | */ | |
633 | result = acpi_bus_init_irq(); | |
634 | if (result) | |
635 | goto error1; | |
636 | ||
637 | /* | |
638 | * Register the for all standard device notifications. | |
639 | */ | |
640 | status = | |
641 | acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, | |
642 | &acpi_bus_notify, NULL); | |
643 | if (ACPI_FAILURE(status)) { | |
644 | printk(KERN_ERR PREFIX | |
645 | "Unable to register for device notifications\n"); | |
646 | goto error1; | |
647 | } | |
648 | ||
649 | /* | |
650 | * Create the top ACPI proc directory | |
651 | */ | |
652 | acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); | |
653 | ||
654 | return 0; | |
655 | ||
656 | /* Mimic structured exception handling */ | |
657 | error1: | |
658 | acpi_terminate(); | |
659 | return -ENODEV; | |
660 | } | |
661 | ||
662 | struct kobject *acpi_kobj; | |
663 | EXPORT_SYMBOL_GPL(acpi_kobj); | |
664 | ||
665 | static int __init acpi_init(void) | |
666 | { | |
667 | int result; | |
668 | ||
669 | if (acpi_disabled) { | |
670 | printk(KERN_INFO PREFIX "Interpreter disabled.\n"); | |
671 | return -ENODEV; | |
672 | } | |
673 | ||
674 | acpi_kobj = kobject_create_and_add("acpi", firmware_kobj); | |
675 | if (!acpi_kobj) { | |
676 | printk(KERN_WARNING "%s: kset create error\n", __func__); | |
677 | acpi_kobj = NULL; | |
678 | } | |
679 | ||
680 | init_acpi_device_notify(); | |
681 | result = acpi_bus_init(); | |
682 | if (result) { | |
683 | disable_acpi(); | |
684 | return result; | |
685 | } | |
686 | ||
687 | pci_mmcfg_late_init(); | |
688 | acpi_scan_init(); | |
689 | acpi_ec_init(); | |
690 | acpi_debugfs_init(); | |
691 | acpi_sleep_proc_init(); | |
692 | acpi_wakeup_device_init(); | |
693 | return 0; | |
694 | } | |
695 | ||
696 | subsys_initcall(acpi_init); |