2 * acpi_bus.c - ACPI Bus Driver ($Revision: 80 $)
4 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
6 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.
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.
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.
22 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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>
32 #include <linux/device.h>
33 #include <linux/proc_fs.h>
34 #include <linux/acpi.h>
35 #include <linux/slab.h>
37 #include <asm/mpspec.h>
39 #include <linux/pci.h>
40 #include <acpi/acpi_bus.h>
41 #include <acpi/acpi_drivers.h>
42 #include <acpi/apei.h>
43 #include <linux/dmi.h>
44 #include <linux/suspend.h>
48 #define _COMPONENT ACPI_BUS_COMPONENT
49 ACPI_MODULE_NAME("bus");
51 struct acpi_device
*acpi_root
;
52 struct proc_dir_entry
*acpi_root_dir
;
53 EXPORT_SYMBOL(acpi_root_dir
);
55 #define STRUCT_TO_INT(s) (*((int*)&s))
59 static int set_copy_dsdt(const struct dmi_system_id
*id
)
61 printk(KERN_NOTICE
"%s detected - "
62 "force copy of DSDT to local memory\n", id
->ident
);
63 acpi_gbl_copy_dsdt_locally
= 1;
67 static struct dmi_system_id dsdt_dmi_table
[] __initdata
= {
69 * Invoke DSDT corruption work-around on all Toshiba Satellite.
70 * https://bugzilla.kernel.org/show_bug.cgi?id=14679
73 .callback
= set_copy_dsdt
,
74 .ident
= "TOSHIBA Satellite",
76 DMI_MATCH(DMI_SYS_VENDOR
, "TOSHIBA"),
77 DMI_MATCH(DMI_PRODUCT_NAME
, "Satellite"),
83 static struct dmi_system_id dsdt_dmi_table
[] __initdata
= {
88 /* --------------------------------------------------------------------------
90 -------------------------------------------------------------------------- */
92 acpi_status
acpi_bus_get_status_handle(acpi_handle handle
,
93 unsigned long long *sta
)
97 status
= acpi_evaluate_integer(handle
, "_STA", NULL
, sta
);
98 if (ACPI_SUCCESS(status
))
101 if (status
== AE_NOT_FOUND
) {
102 *sta
= ACPI_STA_DEVICE_PRESENT
| ACPI_STA_DEVICE_ENABLED
|
103 ACPI_STA_DEVICE_UI
| ACPI_STA_DEVICE_FUNCTIONING
;
109 int acpi_bus_get_status(struct acpi_device
*device
)
112 unsigned long long sta
;
114 status
= acpi_bus_get_status_handle(device
->handle
, &sta
);
115 if (ACPI_FAILURE(status
))
118 STRUCT_TO_INT(device
->status
) = (int) sta
;
120 if (device
->status
.functional
&& !device
->status
.present
) {
121 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Device [%s] status [%08x]: "
122 "functional but not present;\n",
124 (u32
) STRUCT_TO_INT(device
->status
)));
127 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Device [%s] status [%08x]\n",
129 (u32
) STRUCT_TO_INT(device
->status
)));
132 EXPORT_SYMBOL(acpi_bus_get_status
);
134 void acpi_bus_private_data_handler(acpi_handle handle
,
139 EXPORT_SYMBOL(acpi_bus_private_data_handler
);
141 int acpi_bus_get_private_data(acpi_handle handle
, void **data
)
148 status
= acpi_get_data(handle
, acpi_bus_private_data_handler
, data
);
149 if (ACPI_FAILURE(status
) || !*data
) {
150 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "No context for object [%p]\n",
157 EXPORT_SYMBOL(acpi_bus_get_private_data
);
159 static void acpi_print_osc_error(acpi_handle handle
,
160 struct acpi_osc_context
*context
, char *error
)
162 struct acpi_buffer buffer
= {ACPI_ALLOCATE_BUFFER
};
165 if (ACPI_FAILURE(acpi_get_name(handle
, ACPI_FULL_PATHNAME
, &buffer
)))
166 printk(KERN_DEBUG
"%s\n", error
);
168 printk(KERN_DEBUG
"%s:%s\n", (char *)buffer
.pointer
, error
);
169 kfree(buffer
.pointer
);
171 printk(KERN_DEBUG
"_OSC request data:");
172 for (i
= 0; i
< context
->cap
.length
; i
+= sizeof(u32
))
173 printk("%x ", *((u32
*)(context
->cap
.pointer
+ i
)));
177 acpi_status
acpi_str_to_uuid(char *str
, u8
*uuid
)
180 static int opc_map_to_uuid
[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21,
181 24, 26, 28, 30, 32, 34};
183 if (strlen(str
) != 36)
184 return AE_BAD_PARAMETER
;
185 for (i
= 0; i
< 36; i
++) {
186 if (i
== 8 || i
== 13 || i
== 18 || i
== 23) {
188 return AE_BAD_PARAMETER
;
189 } else if (!isxdigit(str
[i
]))
190 return AE_BAD_PARAMETER
;
192 for (i
= 0; i
< 16; i
++) {
193 uuid
[i
] = hex_to_bin(str
[opc_map_to_uuid
[i
]]) << 4;
194 uuid
[i
] |= hex_to_bin(str
[opc_map_to_uuid
[i
] + 1]);
198 EXPORT_SYMBOL_GPL(acpi_str_to_uuid
);
200 acpi_status
acpi_run_osc(acpi_handle handle
, struct acpi_osc_context
*context
)
203 struct acpi_object_list input
;
204 union acpi_object in_params
[4];
205 union acpi_object
*out_obj
;
208 struct acpi_buffer output
= {ACPI_ALLOCATE_BUFFER
, NULL
};
212 if (ACPI_FAILURE(acpi_str_to_uuid(context
->uuid_str
, uuid
)))
214 context
->ret
.length
= ACPI_ALLOCATE_BUFFER
;
215 context
->ret
.pointer
= NULL
;
217 /* Setting up input parameters */
219 input
.pointer
= in_params
;
220 in_params
[0].type
= ACPI_TYPE_BUFFER
;
221 in_params
[0].buffer
.length
= 16;
222 in_params
[0].buffer
.pointer
= uuid
;
223 in_params
[1].type
= ACPI_TYPE_INTEGER
;
224 in_params
[1].integer
.value
= context
->rev
;
225 in_params
[2].type
= ACPI_TYPE_INTEGER
;
226 in_params
[2].integer
.value
= context
->cap
.length
/sizeof(u32
);
227 in_params
[3].type
= ACPI_TYPE_BUFFER
;
228 in_params
[3].buffer
.length
= context
->cap
.length
;
229 in_params
[3].buffer
.pointer
= context
->cap
.pointer
;
231 status
= acpi_evaluate_object(handle
, "_OSC", &input
, &output
);
232 if (ACPI_FAILURE(status
))
236 return AE_NULL_OBJECT
;
238 out_obj
= output
.pointer
;
239 if (out_obj
->type
!= ACPI_TYPE_BUFFER
240 || out_obj
->buffer
.length
!= context
->cap
.length
) {
241 acpi_print_osc_error(handle
, context
,
242 "_OSC evaluation returned wrong type");
246 /* Need to ignore the bit0 in result code */
247 errors
= *((u32
*)out_obj
->buffer
.pointer
) & ~(1 << 0);
249 if (errors
& OSC_REQUEST_ERROR
)
250 acpi_print_osc_error(handle
, context
,
251 "_OSC request failed");
252 if (errors
& OSC_INVALID_UUID_ERROR
)
253 acpi_print_osc_error(handle
, context
,
254 "_OSC invalid UUID");
255 if (errors
& OSC_INVALID_REVISION_ERROR
)
256 acpi_print_osc_error(handle
, context
,
257 "_OSC invalid revision");
258 if (errors
& OSC_CAPABILITIES_MASK_ERROR
) {
259 if (((u32
*)context
->cap
.pointer
)[OSC_QUERY_DWORD
]
269 context
->ret
.length
= out_obj
->buffer
.length
;
270 context
->ret
.pointer
= kmemdup(out_obj
->buffer
.pointer
,
271 context
->ret
.length
, GFP_KERNEL
);
272 if (!context
->ret
.pointer
) {
273 status
= AE_NO_MEMORY
;
279 kfree(output
.pointer
);
281 context
->ret
.pointer
= NULL
;
284 EXPORT_SYMBOL(acpi_run_osc
);
286 bool osc_sb_apei_support_acked
;
287 static u8 sb_uuid_str
[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48";
288 static void acpi_bus_osc_support(void)
291 struct acpi_osc_context context
= {
292 .uuid_str
= sb_uuid_str
,
295 .cap
.pointer
= capbuf
,
299 capbuf
[OSC_QUERY_DWORD
] = OSC_QUERY_ENABLE
;
300 capbuf
[OSC_SUPPORT_DWORD
] = OSC_SB_PR3_SUPPORT
; /* _PR3 is in use */
301 #if defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) ||\
302 defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE)
303 capbuf
[OSC_SUPPORT_DWORD
] |= OSC_SB_PAD_SUPPORT
;
306 #if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE)
307 capbuf
[OSC_SUPPORT_DWORD
] |= OSC_SB_PPC_OST_SUPPORT
;
310 #ifdef ACPI_HOTPLUG_OST
311 capbuf
[OSC_SUPPORT_DWORD
] |= OSC_SB_HOTPLUG_OST_SUPPORT
;
315 capbuf
[OSC_SUPPORT_DWORD
] |= OSC_SB_APEI_SUPPORT
;
316 if (ACPI_FAILURE(acpi_get_handle(NULL
, "\\_SB", &handle
)))
318 if (ACPI_SUCCESS(acpi_run_osc(handle
, &context
))) {
319 u32
*capbuf_ret
= context
.ret
.pointer
;
320 if (context
.ret
.length
> OSC_SUPPORT_DWORD
)
321 osc_sb_apei_support_acked
=
322 capbuf_ret
[OSC_SUPPORT_DWORD
] & OSC_SB_APEI_SUPPORT
;
323 kfree(context
.ret
.pointer
);
325 /* do we need to check other returned cap? Sounds no */
328 /* --------------------------------------------------------------------------
329 Notification Handling
330 -------------------------------------------------------------------------- */
332 static void acpi_bus_check_device(acpi_handle handle
)
334 struct acpi_device
*device
;
336 struct acpi_device_status old_status
;
338 if (acpi_bus_get_device(handle
, &device
))
343 old_status
= device
->status
;
346 * Make sure this device's parent is present before we go about
347 * messing with the device.
349 if (device
->parent
&& !device
->parent
->status
.present
) {
350 device
->status
= device
->parent
->status
;
354 status
= acpi_bus_get_status(device
);
355 if (ACPI_FAILURE(status
))
358 if (STRUCT_TO_INT(old_status
) == STRUCT_TO_INT(device
->status
))
362 * Device Insertion/Removal
364 if ((device
->status
.present
) && !(old_status
.present
)) {
365 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Device insertion detected\n"));
366 /* TBD: Handle device insertion */
367 } else if (!(device
->status
.present
) && (old_status
.present
)) {
368 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Device removal detected\n"));
369 /* TBD: Handle device removal */
373 static void acpi_bus_check_scope(acpi_handle handle
)
376 acpi_bus_check_device(handle
);
379 * TBD: Enumerate child devices within this device's scope and
380 * run acpi_bus_check_device()'s on them.
387 * Callback for all 'system-level' device notifications (values 0x00-0x7F).
389 static void acpi_bus_notify(acpi_handle handle
, u32 type
, void *data
)
391 struct acpi_device
*device
= NULL
;
392 struct acpi_driver
*driver
;
394 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Notification %#02x to handle %p\n",
399 case ACPI_NOTIFY_BUS_CHECK
:
400 acpi_bus_check_scope(handle
);
402 * TBD: We'll need to outsource certain events to non-ACPI
403 * drivers via the device manager (device.c).
407 case ACPI_NOTIFY_DEVICE_CHECK
:
408 acpi_bus_check_device(handle
);
410 * TBD: We'll need to outsource certain events to non-ACPI
411 * drivers via the device manager (device.c).
415 case ACPI_NOTIFY_DEVICE_WAKE
:
419 case ACPI_NOTIFY_EJECT_REQUEST
:
423 case ACPI_NOTIFY_DEVICE_CHECK_LIGHT
:
424 /* TBD: Exactly what does 'light' mean? */
427 case ACPI_NOTIFY_FREQUENCY_MISMATCH
:
431 case ACPI_NOTIFY_BUS_MODE_MISMATCH
:
435 case ACPI_NOTIFY_POWER_FAULT
:
440 ACPI_DEBUG_PRINT((ACPI_DB_INFO
,
441 "Received unknown/unsupported notification [%08x]\n",
446 acpi_bus_get_device(handle
, &device
);
448 driver
= device
->driver
;
449 if (driver
&& driver
->ops
.notify
&&
450 (driver
->flags
& ACPI_DRIVER_ALL_NOTIFY_EVENTS
))
451 driver
->ops
.notify(device
, type
);
455 /* --------------------------------------------------------------------------
456 Initialization/Cleanup
457 -------------------------------------------------------------------------- */
459 static int __init
acpi_bus_init_irq(void)
462 char *message
= NULL
;
466 * Let the system know what interrupt model we are using by
467 * evaluating the \_PIC object, if exists.
470 switch (acpi_irq_model
) {
471 case ACPI_IRQ_MODEL_PIC
:
474 case ACPI_IRQ_MODEL_IOAPIC
:
477 case ACPI_IRQ_MODEL_IOSAPIC
:
480 case ACPI_IRQ_MODEL_PLATFORM
:
481 message
= "platform specific model";
484 printk(KERN_WARNING PREFIX
"Unknown interrupt routing model\n");
488 printk(KERN_INFO PREFIX
"Using %s for interrupt routing\n", message
);
490 status
= acpi_execute_simple_method(NULL
, "\\_PIC", acpi_irq_model
);
491 if (ACPI_FAILURE(status
) && (status
!= AE_NOT_FOUND
)) {
492 ACPI_EXCEPTION((AE_INFO
, status
, "Evaluating _PIC"));
499 u8 acpi_gbl_permanent_mmap
;
502 void __init
acpi_early_init(void)
509 printk(KERN_INFO PREFIX
"Core revision %08x\n", ACPI_CA_VERSION
);
511 /* enable workarounds, unless strict ACPI spec. compliance */
513 acpi_gbl_enable_interpreter_slack
= TRUE
;
515 acpi_gbl_permanent_mmap
= 1;
518 * If the machine falls into the DMI check table,
519 * DSDT will be copied to memory
521 dmi_check_system(dsdt_dmi_table
);
523 status
= acpi_reallocate_root_table();
524 if (ACPI_FAILURE(status
)) {
525 printk(KERN_ERR PREFIX
526 "Unable to reallocate ACPI tables\n");
530 status
= acpi_initialize_subsystem();
531 if (ACPI_FAILURE(status
)) {
532 printk(KERN_ERR PREFIX
533 "Unable to initialize the ACPI Interpreter\n");
537 status
= acpi_load_tables();
538 if (ACPI_FAILURE(status
)) {
539 printk(KERN_ERR PREFIX
540 "Unable to load the System Description Tables\n");
546 /* compatible (0) means level (3) */
547 if (!(acpi_sci_flags
& ACPI_MADT_TRIGGER_MASK
)) {
548 acpi_sci_flags
&= ~ACPI_MADT_TRIGGER_MASK
;
549 acpi_sci_flags
|= ACPI_MADT_TRIGGER_LEVEL
;
551 /* Set PIC-mode SCI trigger type */
552 acpi_pic_sci_set_trigger(acpi_gbl_FADT
.sci_interrupt
,
553 (acpi_sci_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2);
556 * now that acpi_gbl_FADT is initialized,
557 * update it with result from INT_SRC_OVR parsing
559 acpi_gbl_FADT
.sci_interrupt
= acpi_sci_override_gsi
;
563 status
= acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE
);
564 if (ACPI_FAILURE(status
)) {
565 printk(KERN_ERR PREFIX
"Unable to enable ACPI\n");
576 static int __init
acpi_bus_init(void)
581 acpi_os_initialize1();
583 status
= acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE
);
584 if (ACPI_FAILURE(status
)) {
585 printk(KERN_ERR PREFIX
586 "Unable to start the ACPI Interpreter\n");
591 * ACPI 2.0 requires the EC driver to be loaded and work before
592 * the EC device is found in the namespace (i.e. before acpi_initialize_objects()
595 * This is accomplished by looking for the ECDT table, and getting
596 * the EC parameters out of that.
598 status
= acpi_ec_ecdt_probe();
599 /* Ignore result. Not having an ECDT is not fatal. */
601 status
= acpi_initialize_objects(ACPI_FULL_INITIALIZATION
);
602 if (ACPI_FAILURE(status
)) {
603 printk(KERN_ERR PREFIX
"Unable to initialize ACPI objects\n");
608 * _OSC method may exist in module level code,
609 * so it must be run after ACPI_FULL_INITIALIZATION
611 acpi_bus_osc_support();
614 * _PDC control method may load dynamic SSDT tables,
615 * and we need to install the table handler before that.
619 acpi_early_processor_set_pdc();
622 * Maybe EC region is required at bus_scan/acpi_get_devices. So it
623 * is necessary to enable it as early as possible.
625 acpi_boot_ec_enable();
627 printk(KERN_INFO PREFIX
"Interpreter enabled\n");
629 /* Initialize sleep structures */
633 * Get the system interrupt model and evaluate \_PIC.
635 result
= acpi_bus_init_irq();
640 * Register the for all standard device notifications.
643 acpi_install_notify_handler(ACPI_ROOT_OBJECT
, ACPI_SYSTEM_NOTIFY
,
644 &acpi_bus_notify
, NULL
);
645 if (ACPI_FAILURE(status
)) {
646 printk(KERN_ERR PREFIX
647 "Unable to register for device notifications\n");
652 * Create the top ACPI proc directory
654 acpi_root_dir
= proc_mkdir(ACPI_BUS_FILE_ROOT
, NULL
);
658 /* Mimic structured exception handling */
664 struct kobject
*acpi_kobj
;
665 EXPORT_SYMBOL_GPL(acpi_kobj
);
667 static int __init
acpi_init(void)
672 printk(KERN_INFO PREFIX
"Interpreter disabled.\n");
676 acpi_kobj
= kobject_create_and_add("acpi", firmware_kobj
);
678 printk(KERN_WARNING
"%s: kset create error\n", __func__
);
682 init_acpi_device_notify();
683 result
= acpi_bus_init();
689 pci_mmcfg_late_init();
693 acpi_sleep_proc_init();
694 acpi_wakeup_device_init();
698 subsys_initcall(acpi_init
);