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>
36 #include <linux/regulator/machine.h>
38 #include <asm/mpspec.h>
40 #include <linux/pci.h>
41 #include <acpi/apei.h>
42 #include <linux/dmi.h>
43 #include <linux/suspend.h>
47 #define _COMPONENT ACPI_BUS_COMPONENT
48 ACPI_MODULE_NAME("bus");
50 struct acpi_device
*acpi_root
;
51 struct proc_dir_entry
*acpi_root_dir
;
52 EXPORT_SYMBOL(acpi_root_dir
);
55 #ifdef CONFIG_ACPI_CUSTOM_DSDT
56 static inline int set_copy_dsdt(const struct dmi_system_id
*id
)
61 static int set_copy_dsdt(const struct dmi_system_id
*id
)
63 printk(KERN_NOTICE
"%s detected - "
64 "force copy of DSDT to local memory\n", id
->ident
);
65 acpi_gbl_copy_dsdt_locally
= 1;
70 static struct dmi_system_id dsdt_dmi_table
[] __initdata
= {
72 * Invoke DSDT corruption work-around on all Toshiba Satellite.
73 * https://bugzilla.kernel.org/show_bug.cgi?id=14679
76 .callback
= set_copy_dsdt
,
77 .ident
= "TOSHIBA Satellite",
79 DMI_MATCH(DMI_SYS_VENDOR
, "TOSHIBA"),
80 DMI_MATCH(DMI_PRODUCT_NAME
, "Satellite"),
86 static struct dmi_system_id dsdt_dmi_table
[] __initdata
= {
91 /* --------------------------------------------------------------------------
93 -------------------------------------------------------------------------- */
95 acpi_status
acpi_bus_get_status_handle(acpi_handle handle
,
96 unsigned long long *sta
)
100 status
= acpi_evaluate_integer(handle
, "_STA", NULL
, sta
);
101 if (ACPI_SUCCESS(status
))
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
;
112 int acpi_bus_get_status(struct acpi_device
*device
)
115 unsigned long long sta
;
117 status
= acpi_bus_get_status_handle(device
->handle
, &sta
);
118 if (ACPI_FAILURE(status
))
121 acpi_set_device_status(device
, sta
);
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
));
129 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Device [%s] status [%08x]\n",
130 device
->pnp
.bus_id
, (u32
)sta
));
133 EXPORT_SYMBOL(acpi_bus_get_status
);
135 void acpi_bus_private_data_handler(acpi_handle handle
,
140 EXPORT_SYMBOL(acpi_bus_private_data_handler
);
142 int acpi_bus_attach_private_data(acpi_handle handle
, void *data
)
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");
155 EXPORT_SYMBOL_GPL(acpi_bus_attach_private_data
);
157 int acpi_bus_get_private_data(acpi_handle handle
, void **data
)
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");
172 EXPORT_SYMBOL_GPL(acpi_bus_get_private_data
);
174 void acpi_bus_detach_private_data(acpi_handle handle
)
176 acpi_detach_data(handle
, acpi_bus_private_data_handler
);
178 EXPORT_SYMBOL_GPL(acpi_bus_detach_private_data
);
180 void acpi_bus_no_hotplug(acpi_handle handle
)
182 struct acpi_device
*adev
= NULL
;
184 acpi_bus_get_device(handle
, &adev
);
186 adev
->flags
.no_hotplug
= true;
188 EXPORT_SYMBOL_GPL(acpi_bus_no_hotplug
);
190 static void acpi_print_osc_error(acpi_handle handle
,
191 struct acpi_osc_context
*context
, char *error
)
193 struct acpi_buffer buffer
= {ACPI_ALLOCATE_BUFFER
};
196 if (ACPI_FAILURE(acpi_get_name(handle
, ACPI_FULL_PATHNAME
, &buffer
)))
197 printk(KERN_DEBUG
"%s\n", error
);
199 printk(KERN_DEBUG
"%s:%s\n", (char *)buffer
.pointer
, error
);
200 kfree(buffer
.pointer
);
202 printk(KERN_DEBUG
"_OSC request data:");
203 for (i
= 0; i
< context
->cap
.length
; i
+= sizeof(u32
))
204 printk("%x ", *((u32
*)(context
->cap
.pointer
+ i
)));
208 acpi_status
acpi_str_to_uuid(char *str
, u8
*uuid
)
211 static int opc_map_to_uuid
[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21,
212 24, 26, 28, 30, 32, 34};
214 if (strlen(str
) != 36)
215 return AE_BAD_PARAMETER
;
216 for (i
= 0; i
< 36; i
++) {
217 if (i
== 8 || i
== 13 || i
== 18 || i
== 23) {
219 return AE_BAD_PARAMETER
;
220 } else if (!isxdigit(str
[i
]))
221 return AE_BAD_PARAMETER
;
223 for (i
= 0; i
< 16; i
++) {
224 uuid
[i
] = hex_to_bin(str
[opc_map_to_uuid
[i
]]) << 4;
225 uuid
[i
] |= hex_to_bin(str
[opc_map_to_uuid
[i
] + 1]);
229 EXPORT_SYMBOL_GPL(acpi_str_to_uuid
);
231 acpi_status
acpi_run_osc(acpi_handle handle
, struct acpi_osc_context
*context
)
234 struct acpi_object_list input
;
235 union acpi_object in_params
[4];
236 union acpi_object
*out_obj
;
239 struct acpi_buffer output
= {ACPI_ALLOCATE_BUFFER
, NULL
};
243 if (ACPI_FAILURE(acpi_str_to_uuid(context
->uuid_str
, uuid
)))
245 context
->ret
.length
= ACPI_ALLOCATE_BUFFER
;
246 context
->ret
.pointer
= NULL
;
248 /* Setting up input parameters */
250 input
.pointer
= in_params
;
251 in_params
[0].type
= ACPI_TYPE_BUFFER
;
252 in_params
[0].buffer
.length
= 16;
253 in_params
[0].buffer
.pointer
= uuid
;
254 in_params
[1].type
= ACPI_TYPE_INTEGER
;
255 in_params
[1].integer
.value
= context
->rev
;
256 in_params
[2].type
= ACPI_TYPE_INTEGER
;
257 in_params
[2].integer
.value
= context
->cap
.length
/sizeof(u32
);
258 in_params
[3].type
= ACPI_TYPE_BUFFER
;
259 in_params
[3].buffer
.length
= context
->cap
.length
;
260 in_params
[3].buffer
.pointer
= context
->cap
.pointer
;
262 status
= acpi_evaluate_object(handle
, "_OSC", &input
, &output
);
263 if (ACPI_FAILURE(status
))
267 return AE_NULL_OBJECT
;
269 out_obj
= output
.pointer
;
270 if (out_obj
->type
!= ACPI_TYPE_BUFFER
271 || out_obj
->buffer
.length
!= context
->cap
.length
) {
272 acpi_print_osc_error(handle
, context
,
273 "_OSC evaluation returned wrong type");
277 /* Need to ignore the bit0 in result code */
278 errors
= *((u32
*)out_obj
->buffer
.pointer
) & ~(1 << 0);
280 if (errors
& OSC_REQUEST_ERROR
)
281 acpi_print_osc_error(handle
, context
,
282 "_OSC request failed");
283 if (errors
& OSC_INVALID_UUID_ERROR
)
284 acpi_print_osc_error(handle
, context
,
285 "_OSC invalid UUID");
286 if (errors
& OSC_INVALID_REVISION_ERROR
)
287 acpi_print_osc_error(handle
, context
,
288 "_OSC invalid revision");
289 if (errors
& OSC_CAPABILITIES_MASK_ERROR
) {
290 if (((u32
*)context
->cap
.pointer
)[OSC_QUERY_DWORD
]
300 context
->ret
.length
= out_obj
->buffer
.length
;
301 context
->ret
.pointer
= kmemdup(out_obj
->buffer
.pointer
,
302 context
->ret
.length
, GFP_KERNEL
);
303 if (!context
->ret
.pointer
) {
304 status
= AE_NO_MEMORY
;
310 kfree(output
.pointer
);
312 context
->ret
.pointer
= NULL
;
315 EXPORT_SYMBOL(acpi_run_osc
);
317 bool osc_sb_apei_support_acked
;
318 static u8 sb_uuid_str
[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48";
319 static void acpi_bus_osc_support(void)
322 struct acpi_osc_context context
= {
323 .uuid_str
= sb_uuid_str
,
326 .cap
.pointer
= capbuf
,
330 capbuf
[OSC_QUERY_DWORD
] = OSC_QUERY_ENABLE
;
331 capbuf
[OSC_SUPPORT_DWORD
] = OSC_SB_PR3_SUPPORT
; /* _PR3 is in use */
332 #if defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) ||\
333 defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE)
334 capbuf
[OSC_SUPPORT_DWORD
] |= OSC_SB_PAD_SUPPORT
;
337 #if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE)
338 capbuf
[OSC_SUPPORT_DWORD
] |= OSC_SB_PPC_OST_SUPPORT
;
341 capbuf
[OSC_SUPPORT_DWORD
] |= OSC_SB_HOTPLUG_OST_SUPPORT
;
344 capbuf
[OSC_SUPPORT_DWORD
] |= OSC_SB_APEI_SUPPORT
;
345 if (ACPI_FAILURE(acpi_get_handle(NULL
, "\\_SB", &handle
)))
347 if (ACPI_SUCCESS(acpi_run_osc(handle
, &context
))) {
348 u32
*capbuf_ret
= context
.ret
.pointer
;
349 if (context
.ret
.length
> OSC_SUPPORT_DWORD
)
350 osc_sb_apei_support_acked
=
351 capbuf_ret
[OSC_SUPPORT_DWORD
] & OSC_SB_APEI_SUPPORT
;
352 kfree(context
.ret
.pointer
);
354 /* do we need to check other returned cap? Sounds no */
357 /* --------------------------------------------------------------------------
358 Notification Handling
359 -------------------------------------------------------------------------- */
364 * Callback for all 'system-level' device notifications (values 0x00-0x7F).
366 static void acpi_bus_notify(acpi_handle handle
, u32 type
, void *data
)
368 struct acpi_device
*adev
;
369 struct acpi_driver
*driver
;
370 u32 ost_code
= ACPI_OST_SC_NON_SPECIFIC_FAILURE
;
371 bool hotplug_event
= false;
374 case ACPI_NOTIFY_BUS_CHECK
:
375 acpi_handle_debug(handle
, "ACPI_NOTIFY_BUS_CHECK event\n");
376 hotplug_event
= true;
379 case ACPI_NOTIFY_DEVICE_CHECK
:
380 acpi_handle_debug(handle
, "ACPI_NOTIFY_DEVICE_CHECK event\n");
381 hotplug_event
= true;
384 case ACPI_NOTIFY_DEVICE_WAKE
:
385 acpi_handle_debug(handle
, "ACPI_NOTIFY_DEVICE_WAKE event\n");
388 case ACPI_NOTIFY_EJECT_REQUEST
:
389 acpi_handle_debug(handle
, "ACPI_NOTIFY_EJECT_REQUEST event\n");
390 hotplug_event
= true;
393 case ACPI_NOTIFY_DEVICE_CHECK_LIGHT
:
394 acpi_handle_debug(handle
, "ACPI_NOTIFY_DEVICE_CHECK_LIGHT event\n");
395 /* TBD: Exactly what does 'light' mean? */
398 case ACPI_NOTIFY_FREQUENCY_MISMATCH
:
399 acpi_handle_err(handle
, "Device cannot be configured due "
400 "to a frequency mismatch\n");
403 case ACPI_NOTIFY_BUS_MODE_MISMATCH
:
404 acpi_handle_err(handle
, "Device cannot be configured due "
405 "to a bus mode mismatch\n");
408 case ACPI_NOTIFY_POWER_FAULT
:
409 acpi_handle_err(handle
, "Device has suffered a power fault\n");
413 acpi_handle_debug(handle
, "Unknown event type 0x%x\n", type
);
417 adev
= acpi_bus_get_acpi_device(handle
);
421 driver
= adev
->driver
;
422 if (driver
&& driver
->ops
.notify
&&
423 (driver
->flags
& ACPI_DRIVER_ALL_NOTIFY_EVENTS
))
424 driver
->ops
.notify(adev
, type
);
426 if (hotplug_event
&& ACPI_SUCCESS(acpi_hotplug_schedule(adev
, type
)))
429 acpi_bus_put_acpi_device(adev
);
433 acpi_evaluate_ost(handle
, type
, ost_code
, NULL
);
436 /* --------------------------------------------------------------------------
437 Initialization/Cleanup
438 -------------------------------------------------------------------------- */
440 static int __init
acpi_bus_init_irq(void)
443 char *message
= NULL
;
447 * Let the system know what interrupt model we are using by
448 * evaluating the \_PIC object, if exists.
451 switch (acpi_irq_model
) {
452 case ACPI_IRQ_MODEL_PIC
:
455 case ACPI_IRQ_MODEL_IOAPIC
:
458 case ACPI_IRQ_MODEL_IOSAPIC
:
461 case ACPI_IRQ_MODEL_PLATFORM
:
462 message
= "platform specific model";
465 printk(KERN_WARNING PREFIX
"Unknown interrupt routing model\n");
469 printk(KERN_INFO PREFIX
"Using %s for interrupt routing\n", message
);
471 status
= acpi_execute_simple_method(NULL
, "\\_PIC", acpi_irq_model
);
472 if (ACPI_FAILURE(status
) && (status
!= AE_NOT_FOUND
)) {
473 ACPI_EXCEPTION((AE_INFO
, status
, "Evaluating _PIC"));
480 void __init
acpi_early_init(void)
487 printk(KERN_INFO PREFIX
"Core revision %08x\n", ACPI_CA_VERSION
);
489 /* It's safe to verify table checksums during late stage */
490 acpi_gbl_verify_table_checksum
= TRUE
;
492 /* enable workarounds, unless strict ACPI spec. compliance */
494 acpi_gbl_enable_interpreter_slack
= TRUE
;
496 acpi_gbl_permanent_mmap
= 1;
499 * If the machine falls into the DMI check table,
500 * DSDT will be copied to memory
502 dmi_check_system(dsdt_dmi_table
);
504 status
= acpi_reallocate_root_table();
505 if (ACPI_FAILURE(status
)) {
506 printk(KERN_ERR PREFIX
507 "Unable to reallocate ACPI tables\n");
511 status
= acpi_initialize_subsystem();
512 if (ACPI_FAILURE(status
)) {
513 printk(KERN_ERR PREFIX
514 "Unable to initialize the ACPI Interpreter\n");
518 status
= acpi_load_tables();
519 if (ACPI_FAILURE(status
)) {
520 printk(KERN_ERR PREFIX
521 "Unable to load the System Description Tables\n");
527 /* compatible (0) means level (3) */
528 if (!(acpi_sci_flags
& ACPI_MADT_TRIGGER_MASK
)) {
529 acpi_sci_flags
&= ~ACPI_MADT_TRIGGER_MASK
;
530 acpi_sci_flags
|= ACPI_MADT_TRIGGER_LEVEL
;
532 /* Set PIC-mode SCI trigger type */
533 acpi_pic_sci_set_trigger(acpi_gbl_FADT
.sci_interrupt
,
534 (acpi_sci_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2);
537 * now that acpi_gbl_FADT is initialized,
538 * update it with result from INT_SRC_OVR parsing
540 acpi_gbl_FADT
.sci_interrupt
= acpi_sci_override_gsi
;
544 status
= acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE
);
545 if (ACPI_FAILURE(status
)) {
546 printk(KERN_ERR PREFIX
"Unable to enable ACPI\n");
551 * If the system is using ACPI then we can be reasonably
552 * confident that any regulators are managed by the firmware
553 * so tell the regulator core it has everything it needs to
556 regulator_has_full_constraints();
565 static int __init
acpi_bus_init(void)
570 acpi_os_initialize1();
572 status
= acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE
);
573 if (ACPI_FAILURE(status
)) {
574 printk(KERN_ERR PREFIX
575 "Unable to start the ACPI Interpreter\n");
580 * ACPI 2.0 requires the EC driver to be loaded and work before
581 * the EC device is found in the namespace (i.e. before acpi_initialize_objects()
584 * This is accomplished by looking for the ECDT table, and getting
585 * the EC parameters out of that.
587 status
= acpi_ec_ecdt_probe();
588 /* Ignore result. Not having an ECDT is not fatal. */
590 status
= acpi_initialize_objects(ACPI_FULL_INITIALIZATION
);
591 if (ACPI_FAILURE(status
)) {
592 printk(KERN_ERR PREFIX
"Unable to initialize ACPI objects\n");
597 * _OSC method may exist in module level code,
598 * so it must be run after ACPI_FULL_INITIALIZATION
600 acpi_bus_osc_support();
603 * _PDC control method may load dynamic SSDT tables,
604 * and we need to install the table handler before that.
608 acpi_early_processor_set_pdc();
611 * Maybe EC region is required at bus_scan/acpi_get_devices. So it
612 * is necessary to enable it as early as possible.
614 acpi_boot_ec_enable();
616 printk(KERN_INFO PREFIX
"Interpreter enabled\n");
618 /* Initialize sleep structures */
622 * Get the system interrupt model and evaluate \_PIC.
624 result
= acpi_bus_init_irq();
629 * Register the for all standard device notifications.
632 acpi_install_notify_handler(ACPI_ROOT_OBJECT
, ACPI_SYSTEM_NOTIFY
,
633 &acpi_bus_notify
, NULL
);
634 if (ACPI_FAILURE(status
)) {
635 printk(KERN_ERR PREFIX
636 "Unable to register for device notifications\n");
641 * Create the top ACPI proc directory
643 acpi_root_dir
= proc_mkdir(ACPI_BUS_FILE_ROOT
, NULL
);
647 /* Mimic structured exception handling */
653 struct kobject
*acpi_kobj
;
654 EXPORT_SYMBOL_GPL(acpi_kobj
);
656 static int __init
acpi_init(void)
661 printk(KERN_INFO PREFIX
"Interpreter disabled.\n");
665 acpi_kobj
= kobject_create_and_add("acpi", firmware_kobj
);
667 printk(KERN_WARNING
"%s: kset create error\n", __func__
);
671 init_acpi_device_notify();
672 result
= acpi_bus_init();
678 pci_mmcfg_late_init();
682 acpi_sleep_proc_init();
683 acpi_wakeup_device_init();
687 subsys_initcall(acpi_init
);