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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#include <linux/regulator/machine.h>
37#ifdef CONFIG_X86
38#include <asm/mpspec.h>
39#endif
40#include <linux/pci.h>
41#include <acpi/apei.h>
42#include <linux/dmi.h>
43#include <linux/suspend.h>
44
45#include "internal.h"
46
47#define _COMPONENT ACPI_BUS_COMPONENT
48ACPI_MODULE_NAME("bus");
49
50struct acpi_device *acpi_root;
51struct proc_dir_entry *acpi_root_dir;
52EXPORT_SYMBOL(acpi_root_dir);
53
54#ifdef CONFIG_X86
55#ifdef CONFIG_ACPI_CUSTOM_DSDT
56static inline int set_copy_dsdt(const struct dmi_system_id *id)
57{
58 return 0;
59}
60#else
61static int set_copy_dsdt(const struct dmi_system_id *id)
62{
63 printk(KERN_NOTICE "%s detected - "
64 "force copy of DSDT to local memory\n", id->ident);
65 acpi_gbl_copy_dsdt_locally = 1;
66 return 0;
67}
68#endif
69
70static struct dmi_system_id dsdt_dmi_table[] __initdata = {
71
72
73
74
75 {
76 .callback = set_copy_dsdt,
77 .ident = "TOSHIBA Satellite",
78 .matches = {
79 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
80 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
81 },
82 },
83 {}
84};
85#else
86static struct dmi_system_id dsdt_dmi_table[] __initdata = {
87 {}
88};
89#endif
90
91
92
93
94
95acpi_status acpi_bus_get_status_handle(acpi_handle handle,
96 unsigned long long *sta)
97{
98 acpi_status status;
99
100 status = acpi_evaluate_integer(handle, "_STA", NULL, sta);
101 if (ACPI_SUCCESS(status))
102 return AE_OK;
103
104 if (status == AE_NOT_FOUND) {
105 *sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED |
106 ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING;
107 return AE_OK;
108 }
109 return status;
110}
111
112int acpi_bus_get_status(struct acpi_device *device)
113{
114 acpi_status status;
115 unsigned long long sta;
116
117 status = acpi_bus_get_status_handle(device->handle, &sta);
118 if (ACPI_FAILURE(status))
119 return -ENODEV;
120
121 acpi_set_device_status(device, sta);
122
123 if (device->status.functional && !device->status.present) {
124 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: "
125 "functional but not present;\n",
126 device->pnp.bus_id, (u32)sta));
127 }
128
129 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n",
130 device->pnp.bus_id, (u32)sta));
131 return 0;
132}
133EXPORT_SYMBOL(acpi_bus_get_status);
134
135void acpi_bus_private_data_handler(acpi_handle handle,
136 void *context)
137{
138 return;
139}
140EXPORT_SYMBOL(acpi_bus_private_data_handler);
141
142int acpi_bus_attach_private_data(acpi_handle handle, void *data)
143{
144 acpi_status status;
145
146 status = acpi_attach_data(handle,
147 acpi_bus_private_data_handler, data);
148 if (ACPI_FAILURE(status)) {
149 acpi_handle_debug(handle, "Error attaching device data\n");
150 return -ENODEV;
151 }
152
153 return 0;
154}
155EXPORT_SYMBOL_GPL(acpi_bus_attach_private_data);
156
157int acpi_bus_get_private_data(acpi_handle handle, void **data)
158{
159 acpi_status status;
160
161 if (!*data)
162 return -EINVAL;
163
164 status = acpi_get_data(handle, acpi_bus_private_data_handler, data);
165 if (ACPI_FAILURE(status)) {
166 acpi_handle_debug(handle, "No context for object\n");
167 return -ENODEV;
168 }
169
170 return 0;
171}
172EXPORT_SYMBOL_GPL(acpi_bus_get_private_data);
173
174void acpi_bus_detach_private_data(acpi_handle handle)
175{
176 acpi_detach_data(handle, acpi_bus_private_data_handler);
177}
178EXPORT_SYMBOL_GPL(acpi_bus_detach_private_data);
179
180static void acpi_print_osc_error(acpi_handle handle,
181 struct acpi_osc_context *context, char *error)
182{
183 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER};
184 int i;
185
186 if (ACPI_FAILURE(acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer)))
187 printk(KERN_DEBUG "%s\n", error);
188 else {
189 printk(KERN_DEBUG "%s:%s\n", (char *)buffer.pointer, error);
190 kfree(buffer.pointer);
191 }
192 printk(KERN_DEBUG"_OSC request data:");
193 for (i = 0; i < context->cap.length; i += sizeof(u32))
194 printk("%x ", *((u32 *)(context->cap.pointer + i)));
195 printk("\n");
196}
197
198acpi_status acpi_str_to_uuid(char *str, u8 *uuid)
199{
200 int i;
201 static int opc_map_to_uuid[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21,
202 24, 26, 28, 30, 32, 34};
203
204 if (strlen(str) != 36)
205 return AE_BAD_PARAMETER;
206 for (i = 0; i < 36; i++) {
207 if (i == 8 || i == 13 || i == 18 || i == 23) {
208 if (str[i] != '-')
209 return AE_BAD_PARAMETER;
210 } else if (!isxdigit(str[i]))
211 return AE_BAD_PARAMETER;
212 }
213 for (i = 0; i < 16; i++) {
214 uuid[i] = hex_to_bin(str[opc_map_to_uuid[i]]) << 4;
215 uuid[i] |= hex_to_bin(str[opc_map_to_uuid[i] + 1]);
216 }
217 return AE_OK;
218}
219EXPORT_SYMBOL_GPL(acpi_str_to_uuid);
220
221acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context)
222{
223 acpi_status status;
224 struct acpi_object_list input;
225 union acpi_object in_params[4];
226 union acpi_object *out_obj;
227 u8 uuid[16];
228 u32 errors;
229 struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL};
230
231 if (!context)
232 return AE_ERROR;
233 if (ACPI_FAILURE(acpi_str_to_uuid(context->uuid_str, uuid)))
234 return AE_ERROR;
235 context->ret.length = ACPI_ALLOCATE_BUFFER;
236 context->ret.pointer = NULL;
237
238
239 input.count = 4;
240 input.pointer = in_params;
241 in_params[0].type = ACPI_TYPE_BUFFER;
242 in_params[0].buffer.length = 16;
243 in_params[0].buffer.pointer = uuid;
244 in_params[1].type = ACPI_TYPE_INTEGER;
245 in_params[1].integer.value = context->rev;
246 in_params[2].type = ACPI_TYPE_INTEGER;
247 in_params[2].integer.value = context->cap.length/sizeof(u32);
248 in_params[3].type = ACPI_TYPE_BUFFER;
249 in_params[3].buffer.length = context->cap.length;
250 in_params[3].buffer.pointer = context->cap.pointer;
251
252 status = acpi_evaluate_object(handle, "_OSC", &input, &output);
253 if (ACPI_FAILURE(status))
254 return status;
255
256 if (!output.length)
257 return AE_NULL_OBJECT;
258
259 out_obj = output.pointer;
260 if (out_obj->type != ACPI_TYPE_BUFFER
261 || out_obj->buffer.length != context->cap.length) {
262 acpi_print_osc_error(handle, context,
263 "_OSC evaluation returned wrong type");
264 status = AE_TYPE;
265 goto out_kfree;
266 }
267
268 errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0);
269 if (errors) {
270 if (errors & OSC_REQUEST_ERROR)
271 acpi_print_osc_error(handle, context,
272 "_OSC request failed");
273 if (errors & OSC_INVALID_UUID_ERROR)
274 acpi_print_osc_error(handle, context,
275 "_OSC invalid UUID");
276 if (errors & OSC_INVALID_REVISION_ERROR)
277 acpi_print_osc_error(handle, context,
278 "_OSC invalid revision");
279 if (errors & OSC_CAPABILITIES_MASK_ERROR) {
280 if (((u32 *)context->cap.pointer)[OSC_QUERY_DWORD]
281 & OSC_QUERY_ENABLE)
282 goto out_success;
283 status = AE_SUPPORT;
284 goto out_kfree;
285 }
286 status = AE_ERROR;
287 goto out_kfree;
288 }
289out_success:
290 context->ret.length = out_obj->buffer.length;
291 context->ret.pointer = kmemdup(out_obj->buffer.pointer,
292 context->ret.length, GFP_KERNEL);
293 if (!context->ret.pointer) {
294 status = AE_NO_MEMORY;
295 goto out_kfree;
296 }
297 status = AE_OK;
298
299out_kfree:
300 kfree(output.pointer);
301 if (status != AE_OK)
302 context->ret.pointer = NULL;
303 return status;
304}
305EXPORT_SYMBOL(acpi_run_osc);
306
307bool osc_sb_apei_support_acked;
308static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48";
309static void acpi_bus_osc_support(void)
310{
311 u32 capbuf[2];
312 struct acpi_osc_context context = {
313 .uuid_str = sb_uuid_str,
314 .rev = 1,
315 .cap.length = 8,
316 .cap.pointer = capbuf,
317 };
318 acpi_handle handle;
319
320 capbuf[OSC_QUERY_DWORD] = OSC_QUERY_ENABLE;
321 capbuf[OSC_SUPPORT_DWORD] = OSC_SB_PR3_SUPPORT;
322#if defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) ||\
323 defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE)
324 capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PAD_SUPPORT;
325#endif
326
327#if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE)
328 capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PPC_OST_SUPPORT;
329#endif
330
331 capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT;
332
333 if (!ghes_disable)
334 capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_APEI_SUPPORT;
335 if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle)))
336 return;
337 if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) {
338 u32 *capbuf_ret = context.ret.pointer;
339 if (context.ret.length > OSC_SUPPORT_DWORD)
340 osc_sb_apei_support_acked =
341 capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_APEI_SUPPORT;
342 kfree(context.ret.pointer);
343 }
344
345}
346
347
348
349
350
351
352
353
354
355
356static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
357{
358 struct acpi_device *adev;
359 struct acpi_driver *driver;
360 u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE;
361 bool hotplug_event = false;
362
363 switch (type) {
364 case ACPI_NOTIFY_BUS_CHECK:
365 acpi_handle_debug(handle, "ACPI_NOTIFY_BUS_CHECK event\n");
366 hotplug_event = true;
367 break;
368
369 case ACPI_NOTIFY_DEVICE_CHECK:
370 acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK event\n");
371 hotplug_event = true;
372 break;
373
374 case ACPI_NOTIFY_DEVICE_WAKE:
375 acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_WAKE event\n");
376 break;
377
378 case ACPI_NOTIFY_EJECT_REQUEST:
379 acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event\n");
380 hotplug_event = true;
381 break;
382
383 case ACPI_NOTIFY_DEVICE_CHECK_LIGHT:
384 acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK_LIGHT event\n");
385
386 break;
387
388 case ACPI_NOTIFY_FREQUENCY_MISMATCH:
389 acpi_handle_err(handle, "Device cannot be configured due "
390 "to a frequency mismatch\n");
391 break;
392
393 case ACPI_NOTIFY_BUS_MODE_MISMATCH:
394 acpi_handle_err(handle, "Device cannot be configured due "
395 "to a bus mode mismatch\n");
396 break;
397
398 case ACPI_NOTIFY_POWER_FAULT:
399 acpi_handle_err(handle, "Device has suffered a power fault\n");
400 break;
401
402 default:
403 acpi_handle_debug(handle, "Unknown event type 0x%x\n", type);
404 break;
405 }
406
407 adev = acpi_bus_get_acpi_device(handle);
408 if (!adev)
409 goto err;
410
411 driver = adev->driver;
412 if (driver && driver->ops.notify &&
413 (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS))
414 driver->ops.notify(adev, type);
415
416 if (hotplug_event && ACPI_SUCCESS(acpi_hotplug_schedule(adev, type)))
417 return;
418
419 acpi_bus_put_acpi_device(adev);
420 return;
421
422 err:
423 acpi_evaluate_ost(handle, type, ost_code, NULL);
424}
425
426
427
428
429
430static int __init acpi_bus_init_irq(void)
431{
432 acpi_status status;
433 char *message = NULL;
434
435
436
437
438
439
440
441 switch (acpi_irq_model) {
442 case ACPI_IRQ_MODEL_PIC:
443 message = "PIC";
444 break;
445 case ACPI_IRQ_MODEL_IOAPIC:
446 message = "IOAPIC";
447 break;
448 case ACPI_IRQ_MODEL_IOSAPIC:
449 message = "IOSAPIC";
450 break;
451 case ACPI_IRQ_MODEL_PLATFORM:
452 message = "platform specific model";
453 break;
454 default:
455 printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n");
456 return -ENODEV;
457 }
458
459 printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message);
460
461 status = acpi_execute_simple_method(NULL, "\\_PIC", acpi_irq_model);
462 if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
463 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC"));
464 return -ENODEV;
465 }
466
467 return 0;
468}
469
470void __init acpi_early_init(void)
471{
472 acpi_status status;
473
474 if (acpi_disabled)
475 return;
476
477 printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION);
478
479
480 acpi_gbl_verify_table_checksum = TRUE;
481
482
483 if (!acpi_strict)
484 acpi_gbl_enable_interpreter_slack = TRUE;
485
486 acpi_gbl_permanent_mmap = 1;
487
488
489
490
491
492 dmi_check_system(dsdt_dmi_table);
493
494 status = acpi_reallocate_root_table();
495 if (ACPI_FAILURE(status)) {
496 printk(KERN_ERR PREFIX
497 "Unable to reallocate ACPI tables\n");
498 goto error0;
499 }
500
501 status = acpi_initialize_subsystem();
502 if (ACPI_FAILURE(status)) {
503 printk(KERN_ERR PREFIX
504 "Unable to initialize the ACPI Interpreter\n");
505 goto error0;
506 }
507
508 status = acpi_load_tables();
509 if (ACPI_FAILURE(status)) {
510 printk(KERN_ERR PREFIX
511 "Unable to load the System Description Tables\n");
512 goto error0;
513 }
514
515#ifdef CONFIG_X86
516 if (!acpi_ioapic) {
517
518 if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) {
519 acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK;
520 acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL;
521 }
522
523 acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt,
524 (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
525 } else {
526
527
528
529
530 acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi;
531 }
532#endif
533
534 status = acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE);
535 if (ACPI_FAILURE(status)) {
536 printk(KERN_ERR PREFIX "Unable to enable ACPI\n");
537 goto error0;
538 }
539
540
541
542
543
544
545
546 regulator_has_full_constraints();
547
548 return;
549
550 error0:
551 disable_acpi();
552 return;
553}
554
555static int __init acpi_bus_init(void)
556{
557 int result;
558 acpi_status status;
559
560 acpi_os_initialize1();
561
562 status = acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE);
563 if (ACPI_FAILURE(status)) {
564 printk(KERN_ERR PREFIX
565 "Unable to start the ACPI Interpreter\n");
566 goto error1;
567 }
568
569
570
571
572
573
574
575
576
577 status = acpi_ec_ecdt_probe();
578
579
580 status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION);
581 if (ACPI_FAILURE(status)) {
582 printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n");
583 goto error1;
584 }
585
586
587
588
589
590 acpi_bus_osc_support();
591
592
593
594
595
596 acpi_sysfs_init();
597
598 acpi_early_processor_set_pdc();
599
600
601
602
603
604 acpi_boot_ec_enable();
605
606 printk(KERN_INFO PREFIX "Interpreter enabled\n");
607
608
609 acpi_sleep_init();
610
611
612
613
614 result = acpi_bus_init_irq();
615 if (result)
616 goto error1;
617
618
619
620
621 status =
622 acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY,
623 &acpi_bus_notify, NULL);
624 if (ACPI_FAILURE(status)) {
625 printk(KERN_ERR PREFIX
626 "Unable to register for device notifications\n");
627 goto error1;
628 }
629
630
631
632
633 acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL);
634
635 return 0;
636
637
638 error1:
639 acpi_terminate();
640 return -ENODEV;
641}
642
643struct kobject *acpi_kobj;
644EXPORT_SYMBOL_GPL(acpi_kobj);
645
646static int __init acpi_init(void)
647{
648 int result;
649
650 if (acpi_disabled) {
651 printk(KERN_INFO PREFIX "Interpreter disabled.\n");
652 return -ENODEV;
653 }
654
655 acpi_kobj = kobject_create_and_add("acpi", firmware_kobj);
656 if (!acpi_kobj) {
657 printk(KERN_WARNING "%s: kset create error\n", __func__);
658 acpi_kobj = NULL;
659 }
660
661 init_acpi_device_notify();
662 result = acpi_bus_init();
663 if (result) {
664 disable_acpi();
665 return result;
666 }
667
668 pci_mmcfg_late_init();
669 acpi_scan_init();
670 acpi_ec_init();
671 acpi_debugfs_init();
672 acpi_sleep_proc_init();
673 acpi_wakeup_device_init();
674 return 0;
675}
676
677subsys_initcall(acpi_init);
678
