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1427 lines
37 KiB
1427 lines
37 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
|
* ACPI device specific properties support. |
|
* |
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* Copyright (C) 2014, Intel Corporation |
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* All rights reserved. |
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* |
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* Authors: Mika Westerberg <[email protected]> |
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* Darren Hart <[email protected]> |
|
* Rafael J. Wysocki <[email protected]> |
|
*/ |
|
|
|
#include <linux/acpi.h> |
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#include <linux/device.h> |
|
#include <linux/export.h> |
|
|
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#include "internal.h" |
|
|
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static int acpi_data_get_property_array(const struct acpi_device_data *data, |
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const char *name, |
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acpi_object_type type, |
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const union acpi_object **obj); |
|
|
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/* |
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* The GUIDs here are made equivalent to each other in order to avoid extra |
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* complexity in the properties handling code, with the caveat that the |
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* kernel will accept certain combinations of GUID and properties that are |
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* not defined without a warning. For instance if any of the properties |
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* from different GUID appear in a property list of another, it will be |
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* accepted by the kernel. Firmware validation tools should catch these. |
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*/ |
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static const guid_t prp_guids[] = { |
|
/* ACPI _DSD device properties GUID: daffd814-6eba-4d8c-8a91-bc9bbf4aa301 */ |
|
GUID_INIT(0xdaffd814, 0x6eba, 0x4d8c, |
|
0x8a, 0x91, 0xbc, 0x9b, 0xbf, 0x4a, 0xa3, 0x01), |
|
/* Hotplug in D3 GUID: 6211e2c0-58a3-4af3-90e1-927a4e0c55a4 */ |
|
GUID_INIT(0x6211e2c0, 0x58a3, 0x4af3, |
|
0x90, 0xe1, 0x92, 0x7a, 0x4e, 0x0c, 0x55, 0xa4), |
|
/* External facing port GUID: efcc06cc-73ac-4bc3-bff0-76143807c389 */ |
|
GUID_INIT(0xefcc06cc, 0x73ac, 0x4bc3, |
|
0xbf, 0xf0, 0x76, 0x14, 0x38, 0x07, 0xc3, 0x89), |
|
/* Thunderbolt GUID for IMR_VALID: c44d002f-69f9-4e7d-a904-a7baabdf43f7 */ |
|
GUID_INIT(0xc44d002f, 0x69f9, 0x4e7d, |
|
0xa9, 0x04, 0xa7, 0xba, 0xab, 0xdf, 0x43, 0xf7), |
|
/* Thunderbolt GUID for WAKE_SUPPORTED: 6c501103-c189-4296-ba72-9bf5a26ebe5d */ |
|
GUID_INIT(0x6c501103, 0xc189, 0x4296, |
|
0xba, 0x72, 0x9b, 0xf5, 0xa2, 0x6e, 0xbe, 0x5d), |
|
/* Storage device needs D3 GUID: 5025030f-842f-4ab4-a561-99a5189762d0 */ |
|
GUID_INIT(0x5025030f, 0x842f, 0x4ab4, |
|
0xa5, 0x61, 0x99, 0xa5, 0x18, 0x97, 0x62, 0xd0), |
|
}; |
|
|
|
/* ACPI _DSD data subnodes GUID: dbb8e3e6-5886-4ba6-8795-1319f52a966b */ |
|
static const guid_t ads_guid = |
|
GUID_INIT(0xdbb8e3e6, 0x5886, 0x4ba6, |
|
0x87, 0x95, 0x13, 0x19, 0xf5, 0x2a, 0x96, 0x6b); |
|
|
|
static bool acpi_enumerate_nondev_subnodes(acpi_handle scope, |
|
const union acpi_object *desc, |
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struct acpi_device_data *data, |
|
struct fwnode_handle *parent); |
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static bool acpi_extract_properties(const union acpi_object *desc, |
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struct acpi_device_data *data); |
|
|
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static bool acpi_nondev_subnode_extract(const union acpi_object *desc, |
|
acpi_handle handle, |
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const union acpi_object *link, |
|
struct list_head *list, |
|
struct fwnode_handle *parent) |
|
{ |
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struct acpi_data_node *dn; |
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bool result; |
|
|
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dn = kzalloc(sizeof(*dn), GFP_KERNEL); |
|
if (!dn) |
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return false; |
|
|
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dn->name = link->package.elements[0].string.pointer; |
|
fwnode_init(&dn->fwnode, &acpi_data_fwnode_ops); |
|
dn->parent = parent; |
|
INIT_LIST_HEAD(&dn->data.properties); |
|
INIT_LIST_HEAD(&dn->data.subnodes); |
|
|
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result = acpi_extract_properties(desc, &dn->data); |
|
|
|
if (handle) { |
|
acpi_handle scope; |
|
acpi_status status; |
|
|
|
/* |
|
* The scope for the subnode object lookup is the one of the |
|
* namespace node (device) containing the object that has |
|
* returned the package. That is, it's the scope of that |
|
* object's parent. |
|
*/ |
|
status = acpi_get_parent(handle, &scope); |
|
if (ACPI_SUCCESS(status) |
|
&& acpi_enumerate_nondev_subnodes(scope, desc, &dn->data, |
|
&dn->fwnode)) |
|
result = true; |
|
} else if (acpi_enumerate_nondev_subnodes(NULL, desc, &dn->data, |
|
&dn->fwnode)) { |
|
result = true; |
|
} |
|
|
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if (result) { |
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dn->handle = handle; |
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dn->data.pointer = desc; |
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list_add_tail(&dn->sibling, list); |
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return true; |
|
} |
|
|
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kfree(dn); |
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acpi_handle_debug(handle, "Invalid properties/subnodes data, skipping\n"); |
|
return false; |
|
} |
|
|
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static bool acpi_nondev_subnode_data_ok(acpi_handle handle, |
|
const union acpi_object *link, |
|
struct list_head *list, |
|
struct fwnode_handle *parent) |
|
{ |
|
struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER }; |
|
acpi_status status; |
|
|
|
status = acpi_evaluate_object_typed(handle, NULL, NULL, &buf, |
|
ACPI_TYPE_PACKAGE); |
|
if (ACPI_FAILURE(status)) |
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return false; |
|
|
|
if (acpi_nondev_subnode_extract(buf.pointer, handle, link, list, |
|
parent)) |
|
return true; |
|
|
|
ACPI_FREE(buf.pointer); |
|
return false; |
|
} |
|
|
|
static bool acpi_nondev_subnode_ok(acpi_handle scope, |
|
const union acpi_object *link, |
|
struct list_head *list, |
|
struct fwnode_handle *parent) |
|
{ |
|
acpi_handle handle; |
|
acpi_status status; |
|
|
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if (!scope) |
|
return false; |
|
|
|
status = acpi_get_handle(scope, link->package.elements[1].string.pointer, |
|
&handle); |
|
if (ACPI_FAILURE(status)) |
|
return false; |
|
|
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return acpi_nondev_subnode_data_ok(handle, link, list, parent); |
|
} |
|
|
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static int acpi_add_nondev_subnodes(acpi_handle scope, |
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const union acpi_object *links, |
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struct list_head *list, |
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struct fwnode_handle *parent) |
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{ |
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bool ret = false; |
|
int i; |
|
|
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for (i = 0; i < links->package.count; i++) { |
|
const union acpi_object *link, *desc; |
|
acpi_handle handle; |
|
bool result; |
|
|
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link = &links->package.elements[i]; |
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/* Only two elements allowed. */ |
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if (link->package.count != 2) |
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continue; |
|
|
|
/* The first one must be a string. */ |
|
if (link->package.elements[0].type != ACPI_TYPE_STRING) |
|
continue; |
|
|
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/* The second one may be a string, a reference or a package. */ |
|
switch (link->package.elements[1].type) { |
|
case ACPI_TYPE_STRING: |
|
result = acpi_nondev_subnode_ok(scope, link, list, |
|
parent); |
|
break; |
|
case ACPI_TYPE_LOCAL_REFERENCE: |
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handle = link->package.elements[1].reference.handle; |
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result = acpi_nondev_subnode_data_ok(handle, link, list, |
|
parent); |
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break; |
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case ACPI_TYPE_PACKAGE: |
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desc = &link->package.elements[1]; |
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result = acpi_nondev_subnode_extract(desc, NULL, link, |
|
list, parent); |
|
break; |
|
default: |
|
result = false; |
|
break; |
|
} |
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ret = ret || result; |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
static bool acpi_enumerate_nondev_subnodes(acpi_handle scope, |
|
const union acpi_object *desc, |
|
struct acpi_device_data *data, |
|
struct fwnode_handle *parent) |
|
{ |
|
int i; |
|
|
|
/* Look for the ACPI data subnodes GUID. */ |
|
for (i = 0; i < desc->package.count; i += 2) { |
|
const union acpi_object *guid, *links; |
|
|
|
guid = &desc->package.elements[i]; |
|
links = &desc->package.elements[i + 1]; |
|
|
|
/* |
|
* The first element must be a GUID and the second one must be |
|
* a package. |
|
*/ |
|
if (guid->type != ACPI_TYPE_BUFFER || |
|
guid->buffer.length != 16 || |
|
links->type != ACPI_TYPE_PACKAGE) |
|
break; |
|
|
|
if (!guid_equal((guid_t *)guid->buffer.pointer, &ads_guid)) |
|
continue; |
|
|
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return acpi_add_nondev_subnodes(scope, links, &data->subnodes, |
|
parent); |
|
} |
|
|
|
return false; |
|
} |
|
|
|
static bool acpi_property_value_ok(const union acpi_object *value) |
|
{ |
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int j; |
|
|
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/* |
|
* The value must be an integer, a string, a reference, or a package |
|
* whose every element must be an integer, a string, or a reference. |
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*/ |
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switch (value->type) { |
|
case ACPI_TYPE_INTEGER: |
|
case ACPI_TYPE_STRING: |
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case ACPI_TYPE_LOCAL_REFERENCE: |
|
return true; |
|
|
|
case ACPI_TYPE_PACKAGE: |
|
for (j = 0; j < value->package.count; j++) |
|
switch (value->package.elements[j].type) { |
|
case ACPI_TYPE_INTEGER: |
|
case ACPI_TYPE_STRING: |
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case ACPI_TYPE_LOCAL_REFERENCE: |
|
continue; |
|
|
|
default: |
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return false; |
|
} |
|
|
|
return true; |
|
} |
|
return false; |
|
} |
|
|
|
static bool acpi_properties_format_valid(const union acpi_object *properties) |
|
{ |
|
int i; |
|
|
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for (i = 0; i < properties->package.count; i++) { |
|
const union acpi_object *property; |
|
|
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property = &properties->package.elements[i]; |
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/* |
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* Only two elements allowed, the first one must be a string and |
|
* the second one has to satisfy certain conditions. |
|
*/ |
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if (property->package.count != 2 |
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|| property->package.elements[0].type != ACPI_TYPE_STRING |
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|| !acpi_property_value_ok(&property->package.elements[1])) |
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return false; |
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} |
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return true; |
|
} |
|
|
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static void acpi_init_of_compatible(struct acpi_device *adev) |
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{ |
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const union acpi_object *of_compatible; |
|
int ret; |
|
|
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ret = acpi_data_get_property_array(&adev->data, "compatible", |
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ACPI_TYPE_STRING, &of_compatible); |
|
if (ret) { |
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ret = acpi_dev_get_property(adev, "compatible", |
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ACPI_TYPE_STRING, &of_compatible); |
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if (ret) { |
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if (adev->parent |
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&& adev->parent->flags.of_compatible_ok) |
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goto out; |
|
|
|
return; |
|
} |
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} |
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adev->data.of_compatible = of_compatible; |
|
|
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out: |
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adev->flags.of_compatible_ok = 1; |
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} |
|
|
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static bool acpi_is_property_guid(const guid_t *guid) |
|
{ |
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int i; |
|
|
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for (i = 0; i < ARRAY_SIZE(prp_guids); i++) { |
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if (guid_equal(guid, &prp_guids[i])) |
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return true; |
|
} |
|
|
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return false; |
|
} |
|
|
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struct acpi_device_properties * |
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acpi_data_add_props(struct acpi_device_data *data, const guid_t *guid, |
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const union acpi_object *properties) |
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{ |
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struct acpi_device_properties *props; |
|
|
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props = kzalloc(sizeof(*props), GFP_KERNEL); |
|
if (props) { |
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INIT_LIST_HEAD(&props->list); |
|
props->guid = guid; |
|
props->properties = properties; |
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list_add_tail(&props->list, &data->properties); |
|
} |
|
|
|
return props; |
|
} |
|
|
|
static bool acpi_extract_properties(const union acpi_object *desc, |
|
struct acpi_device_data *data) |
|
{ |
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int i; |
|
|
|
if (desc->package.count % 2) |
|
return false; |
|
|
|
/* Look for the device properties GUID. */ |
|
for (i = 0; i < desc->package.count; i += 2) { |
|
const union acpi_object *guid, *properties; |
|
|
|
guid = &desc->package.elements[i]; |
|
properties = &desc->package.elements[i + 1]; |
|
|
|
/* |
|
* The first element must be a GUID and the second one must be |
|
* a package. |
|
*/ |
|
if (guid->type != ACPI_TYPE_BUFFER || |
|
guid->buffer.length != 16 || |
|
properties->type != ACPI_TYPE_PACKAGE) |
|
break; |
|
|
|
if (!acpi_is_property_guid((guid_t *)guid->buffer.pointer)) |
|
continue; |
|
|
|
/* |
|
* We found the matching GUID. Now validate the format of the |
|
* package immediately following it. |
|
*/ |
|
if (!acpi_properties_format_valid(properties)) |
|
continue; |
|
|
|
acpi_data_add_props(data, (const guid_t *)guid->buffer.pointer, |
|
properties); |
|
} |
|
|
|
return !list_empty(&data->properties); |
|
} |
|
|
|
void acpi_init_properties(struct acpi_device *adev) |
|
{ |
|
struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER }; |
|
struct acpi_hardware_id *hwid; |
|
acpi_status status; |
|
bool acpi_of = false; |
|
|
|
INIT_LIST_HEAD(&adev->data.properties); |
|
INIT_LIST_HEAD(&adev->data.subnodes); |
|
|
|
if (!adev->handle) |
|
return; |
|
|
|
/* |
|
* Check if ACPI_DT_NAMESPACE_HID is present and inthat case we fill in |
|
* Device Tree compatible properties for this device. |
|
*/ |
|
list_for_each_entry(hwid, &adev->pnp.ids, list) { |
|
if (!strcmp(hwid->id, ACPI_DT_NAMESPACE_HID)) { |
|
acpi_of = true; |
|
break; |
|
} |
|
} |
|
|
|
status = acpi_evaluate_object_typed(adev->handle, "_DSD", NULL, &buf, |
|
ACPI_TYPE_PACKAGE); |
|
if (ACPI_FAILURE(status)) |
|
goto out; |
|
|
|
if (acpi_extract_properties(buf.pointer, &adev->data)) { |
|
adev->data.pointer = buf.pointer; |
|
if (acpi_of) |
|
acpi_init_of_compatible(adev); |
|
} |
|
if (acpi_enumerate_nondev_subnodes(adev->handle, buf.pointer, |
|
&adev->data, acpi_fwnode_handle(adev))) |
|
adev->data.pointer = buf.pointer; |
|
|
|
if (!adev->data.pointer) { |
|
acpi_handle_debug(adev->handle, "Invalid _DSD data, skipping\n"); |
|
ACPI_FREE(buf.pointer); |
|
} |
|
|
|
out: |
|
if (acpi_of && !adev->flags.of_compatible_ok) |
|
acpi_handle_info(adev->handle, |
|
ACPI_DT_NAMESPACE_HID " requires 'compatible' property\n"); |
|
|
|
if (!adev->data.pointer) |
|
acpi_extract_apple_properties(adev); |
|
} |
|
|
|
static void acpi_destroy_nondev_subnodes(struct list_head *list) |
|
{ |
|
struct acpi_data_node *dn, *next; |
|
|
|
if (list_empty(list)) |
|
return; |
|
|
|
list_for_each_entry_safe_reverse(dn, next, list, sibling) { |
|
acpi_destroy_nondev_subnodes(&dn->data.subnodes); |
|
wait_for_completion(&dn->kobj_done); |
|
list_del(&dn->sibling); |
|
ACPI_FREE((void *)dn->data.pointer); |
|
kfree(dn); |
|
} |
|
} |
|
|
|
void acpi_free_properties(struct acpi_device *adev) |
|
{ |
|
struct acpi_device_properties *props, *tmp; |
|
|
|
acpi_destroy_nondev_subnodes(&adev->data.subnodes); |
|
ACPI_FREE((void *)adev->data.pointer); |
|
adev->data.of_compatible = NULL; |
|
adev->data.pointer = NULL; |
|
list_for_each_entry_safe(props, tmp, &adev->data.properties, list) { |
|
list_del(&props->list); |
|
kfree(props); |
|
} |
|
} |
|
|
|
/** |
|
* acpi_data_get_property - return an ACPI property with given name |
|
* @data: ACPI device deta object to get the property from |
|
* @name: Name of the property |
|
* @type: Expected property type |
|
* @obj: Location to store the property value (if not %NULL) |
|
* |
|
* Look up a property with @name and store a pointer to the resulting ACPI |
|
* object at the location pointed to by @obj if found. |
|
* |
|
* Callers must not attempt to free the returned objects. These objects will be |
|
* freed by the ACPI core automatically during the removal of @data. |
|
* |
|
* Return: %0 if property with @name has been found (success), |
|
* %-EINVAL if the arguments are invalid, |
|
* %-EINVAL if the property doesn't exist, |
|
* %-EPROTO if the property value type doesn't match @type. |
|
*/ |
|
static int acpi_data_get_property(const struct acpi_device_data *data, |
|
const char *name, acpi_object_type type, |
|
const union acpi_object **obj) |
|
{ |
|
const struct acpi_device_properties *props; |
|
|
|
if (!data || !name) |
|
return -EINVAL; |
|
|
|
if (!data->pointer || list_empty(&data->properties)) |
|
return -EINVAL; |
|
|
|
list_for_each_entry(props, &data->properties, list) { |
|
const union acpi_object *properties; |
|
unsigned int i; |
|
|
|
properties = props->properties; |
|
for (i = 0; i < properties->package.count; i++) { |
|
const union acpi_object *propname, *propvalue; |
|
const union acpi_object *property; |
|
|
|
property = &properties->package.elements[i]; |
|
|
|
propname = &property->package.elements[0]; |
|
propvalue = &property->package.elements[1]; |
|
|
|
if (!strcmp(name, propname->string.pointer)) { |
|
if (type != ACPI_TYPE_ANY && |
|
propvalue->type != type) |
|
return -EPROTO; |
|
if (obj) |
|
*obj = propvalue; |
|
|
|
return 0; |
|
} |
|
} |
|
} |
|
return -EINVAL; |
|
} |
|
|
|
/** |
|
* acpi_dev_get_property - return an ACPI property with given name. |
|
* @adev: ACPI device to get the property from. |
|
* @name: Name of the property. |
|
* @type: Expected property type. |
|
* @obj: Location to store the property value (if not %NULL). |
|
*/ |
|
int acpi_dev_get_property(const struct acpi_device *adev, const char *name, |
|
acpi_object_type type, const union acpi_object **obj) |
|
{ |
|
return adev ? acpi_data_get_property(&adev->data, name, type, obj) : -EINVAL; |
|
} |
|
EXPORT_SYMBOL_GPL(acpi_dev_get_property); |
|
|
|
static const struct acpi_device_data * |
|
acpi_device_data_of_node(const struct fwnode_handle *fwnode) |
|
{ |
|
if (is_acpi_device_node(fwnode)) { |
|
const struct acpi_device *adev = to_acpi_device_node(fwnode); |
|
return &adev->data; |
|
} else if (is_acpi_data_node(fwnode)) { |
|
const struct acpi_data_node *dn = to_acpi_data_node(fwnode); |
|
return &dn->data; |
|
} |
|
return NULL; |
|
} |
|
|
|
/** |
|
* acpi_node_prop_get - return an ACPI property with given name. |
|
* @fwnode: Firmware node to get the property from. |
|
* @propname: Name of the property. |
|
* @valptr: Location to store a pointer to the property value (if not %NULL). |
|
*/ |
|
int acpi_node_prop_get(const struct fwnode_handle *fwnode, |
|
const char *propname, void **valptr) |
|
{ |
|
return acpi_data_get_property(acpi_device_data_of_node(fwnode), |
|
propname, ACPI_TYPE_ANY, |
|
(const union acpi_object **)valptr); |
|
} |
|
|
|
/** |
|
* acpi_data_get_property_array - return an ACPI array property with given name |
|
* @data: ACPI data object to get the property from |
|
* @name: Name of the property |
|
* @type: Expected type of array elements |
|
* @obj: Location to store a pointer to the property value (if not NULL) |
|
* |
|
* Look up an array property with @name and store a pointer to the resulting |
|
* ACPI object at the location pointed to by @obj if found. |
|
* |
|
* Callers must not attempt to free the returned objects. Those objects will be |
|
* freed by the ACPI core automatically during the removal of @data. |
|
* |
|
* Return: %0 if array property (package) with @name has been found (success), |
|
* %-EINVAL if the arguments are invalid, |
|
* %-EINVAL if the property doesn't exist, |
|
* %-EPROTO if the property is not a package or the type of its elements |
|
* doesn't match @type. |
|
*/ |
|
static int acpi_data_get_property_array(const struct acpi_device_data *data, |
|
const char *name, |
|
acpi_object_type type, |
|
const union acpi_object **obj) |
|
{ |
|
const union acpi_object *prop; |
|
int ret, i; |
|
|
|
ret = acpi_data_get_property(data, name, ACPI_TYPE_PACKAGE, &prop); |
|
if (ret) |
|
return ret; |
|
|
|
if (type != ACPI_TYPE_ANY) { |
|
/* Check that all elements are of correct type. */ |
|
for (i = 0; i < prop->package.count; i++) |
|
if (prop->package.elements[i].type != type) |
|
return -EPROTO; |
|
} |
|
if (obj) |
|
*obj = prop; |
|
|
|
return 0; |
|
} |
|
|
|
static struct fwnode_handle * |
|
acpi_fwnode_get_named_child_node(const struct fwnode_handle *fwnode, |
|
const char *childname) |
|
{ |
|
struct fwnode_handle *child; |
|
|
|
fwnode_for_each_child_node(fwnode, child) { |
|
if (is_acpi_data_node(child)) { |
|
if (acpi_data_node_match(child, childname)) |
|
return child; |
|
continue; |
|
} |
|
|
|
if (!strncmp(acpi_device_bid(to_acpi_device_node(child)), |
|
childname, ACPI_NAMESEG_SIZE)) |
|
return child; |
|
} |
|
|
|
return NULL; |
|
} |
|
|
|
/** |
|
* __acpi_node_get_property_reference - returns handle to the referenced object |
|
* @fwnode: Firmware node to get the property from |
|
* @propname: Name of the property |
|
* @index: Index of the reference to return |
|
* @num_args: Maximum number of arguments after each reference |
|
* @args: Location to store the returned reference with optional arguments |
|
* |
|
* Find property with @name, verifify that it is a package containing at least |
|
* one object reference and if so, store the ACPI device object pointer to the |
|
* target object in @args->adev. If the reference includes arguments, store |
|
* them in the @args->args[] array. |
|
* |
|
* If there's more than one reference in the property value package, @index is |
|
* used to select the one to return. |
|
* |
|
* It is possible to leave holes in the property value set like in the |
|
* example below: |
|
* |
|
* Package () { |
|
* "cs-gpios", |
|
* Package () { |
|
* ^GPIO, 19, 0, 0, |
|
* ^GPIO, 20, 0, 0, |
|
* 0, |
|
* ^GPIO, 21, 0, 0, |
|
* } |
|
* } |
|
* |
|
* Calling this function with index %2 or index %3 return %-ENOENT. If the |
|
* property does not contain any more values %-ENOENT is returned. The NULL |
|
* entry must be single integer and preferably contain value %0. |
|
* |
|
* Return: %0 on success, negative error code on failure. |
|
*/ |
|
int __acpi_node_get_property_reference(const struct fwnode_handle *fwnode, |
|
const char *propname, size_t index, size_t num_args, |
|
struct fwnode_reference_args *args) |
|
{ |
|
const union acpi_object *element, *end; |
|
const union acpi_object *obj; |
|
const struct acpi_device_data *data; |
|
struct acpi_device *device; |
|
int ret, idx = 0; |
|
|
|
data = acpi_device_data_of_node(fwnode); |
|
if (!data) |
|
return -ENOENT; |
|
|
|
ret = acpi_data_get_property(data, propname, ACPI_TYPE_ANY, &obj); |
|
if (ret) |
|
return ret == -EINVAL ? -ENOENT : -EINVAL; |
|
|
|
/* |
|
* The simplest case is when the value is a single reference. Just |
|
* return that reference then. |
|
*/ |
|
if (obj->type == ACPI_TYPE_LOCAL_REFERENCE) { |
|
if (index) |
|
return -EINVAL; |
|
|
|
ret = acpi_bus_get_device(obj->reference.handle, &device); |
|
if (ret) |
|
return ret == -ENODEV ? -EINVAL : ret; |
|
|
|
args->fwnode = acpi_fwnode_handle(device); |
|
args->nargs = 0; |
|
return 0; |
|
} |
|
|
|
/* |
|
* If it is not a single reference, then it is a package of |
|
* references followed by number of ints as follows: |
|
* |
|
* Package () { REF, INT, REF, INT, INT } |
|
* |
|
* The index argument is then used to determine which reference |
|
* the caller wants (along with the arguments). |
|
*/ |
|
if (obj->type != ACPI_TYPE_PACKAGE) |
|
return -EINVAL; |
|
if (index >= obj->package.count) |
|
return -ENOENT; |
|
|
|
element = obj->package.elements; |
|
end = element + obj->package.count; |
|
|
|
while (element < end) { |
|
u32 nargs, i; |
|
|
|
if (element->type == ACPI_TYPE_LOCAL_REFERENCE) { |
|
struct fwnode_handle *ref_fwnode; |
|
|
|
ret = acpi_bus_get_device(element->reference.handle, |
|
&device); |
|
if (ret) |
|
return -EINVAL; |
|
|
|
nargs = 0; |
|
element++; |
|
|
|
/* |
|
* Find the referred data extension node under the |
|
* referred device node. |
|
*/ |
|
for (ref_fwnode = acpi_fwnode_handle(device); |
|
element < end && element->type == ACPI_TYPE_STRING; |
|
element++) { |
|
ref_fwnode = acpi_fwnode_get_named_child_node( |
|
ref_fwnode, element->string.pointer); |
|
if (!ref_fwnode) |
|
return -EINVAL; |
|
} |
|
|
|
/* assume following integer elements are all args */ |
|
for (i = 0; element + i < end && i < num_args; i++) { |
|
int type = element[i].type; |
|
|
|
if (type == ACPI_TYPE_INTEGER) |
|
nargs++; |
|
else if (type == ACPI_TYPE_LOCAL_REFERENCE) |
|
break; |
|
else |
|
return -EINVAL; |
|
} |
|
|
|
if (nargs > NR_FWNODE_REFERENCE_ARGS) |
|
return -EINVAL; |
|
|
|
if (idx == index) { |
|
args->fwnode = ref_fwnode; |
|
args->nargs = nargs; |
|
for (i = 0; i < nargs; i++) |
|
args->args[i] = element[i].integer.value; |
|
|
|
return 0; |
|
} |
|
|
|
element += nargs; |
|
} else if (element->type == ACPI_TYPE_INTEGER) { |
|
if (idx == index) |
|
return -ENOENT; |
|
element++; |
|
} else { |
|
return -EINVAL; |
|
} |
|
|
|
idx++; |
|
} |
|
|
|
return -ENOENT; |
|
} |
|
EXPORT_SYMBOL_GPL(__acpi_node_get_property_reference); |
|
|
|
static int acpi_data_prop_read_single(const struct acpi_device_data *data, |
|
const char *propname, |
|
enum dev_prop_type proptype, void *val) |
|
{ |
|
const union acpi_object *obj; |
|
int ret; |
|
|
|
if (proptype >= DEV_PROP_U8 && proptype <= DEV_PROP_U64) { |
|
ret = acpi_data_get_property(data, propname, ACPI_TYPE_INTEGER, &obj); |
|
if (ret) |
|
return ret; |
|
|
|
switch (proptype) { |
|
case DEV_PROP_U8: |
|
if (obj->integer.value > U8_MAX) |
|
return -EOVERFLOW; |
|
|
|
if (val) |
|
*(u8 *)val = obj->integer.value; |
|
|
|
break; |
|
case DEV_PROP_U16: |
|
if (obj->integer.value > U16_MAX) |
|
return -EOVERFLOW; |
|
|
|
if (val) |
|
*(u16 *)val = obj->integer.value; |
|
|
|
break; |
|
case DEV_PROP_U32: |
|
if (obj->integer.value > U32_MAX) |
|
return -EOVERFLOW; |
|
|
|
if (val) |
|
*(u32 *)val = obj->integer.value; |
|
|
|
break; |
|
default: |
|
if (val) |
|
*(u64 *)val = obj->integer.value; |
|
|
|
break; |
|
} |
|
|
|
if (!val) |
|
return 1; |
|
} else if (proptype == DEV_PROP_STRING) { |
|
ret = acpi_data_get_property(data, propname, ACPI_TYPE_STRING, &obj); |
|
if (ret) |
|
return ret; |
|
|
|
if (val) |
|
*(char **)val = obj->string.pointer; |
|
|
|
return 1; |
|
} else { |
|
ret = -EINVAL; |
|
} |
|
return ret; |
|
} |
|
|
|
static int acpi_copy_property_array_u8(const union acpi_object *items, u8 *val, |
|
size_t nval) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < nval; i++) { |
|
if (items[i].type != ACPI_TYPE_INTEGER) |
|
return -EPROTO; |
|
if (items[i].integer.value > U8_MAX) |
|
return -EOVERFLOW; |
|
|
|
val[i] = items[i].integer.value; |
|
} |
|
return 0; |
|
} |
|
|
|
static int acpi_copy_property_array_u16(const union acpi_object *items, |
|
u16 *val, size_t nval) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < nval; i++) { |
|
if (items[i].type != ACPI_TYPE_INTEGER) |
|
return -EPROTO; |
|
if (items[i].integer.value > U16_MAX) |
|
return -EOVERFLOW; |
|
|
|
val[i] = items[i].integer.value; |
|
} |
|
return 0; |
|
} |
|
|
|
static int acpi_copy_property_array_u32(const union acpi_object *items, |
|
u32 *val, size_t nval) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < nval; i++) { |
|
if (items[i].type != ACPI_TYPE_INTEGER) |
|
return -EPROTO; |
|
if (items[i].integer.value > U32_MAX) |
|
return -EOVERFLOW; |
|
|
|
val[i] = items[i].integer.value; |
|
} |
|
return 0; |
|
} |
|
|
|
static int acpi_copy_property_array_u64(const union acpi_object *items, |
|
u64 *val, size_t nval) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < nval; i++) { |
|
if (items[i].type != ACPI_TYPE_INTEGER) |
|
return -EPROTO; |
|
|
|
val[i] = items[i].integer.value; |
|
} |
|
return 0; |
|
} |
|
|
|
static int acpi_copy_property_array_string(const union acpi_object *items, |
|
char **val, size_t nval) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < nval; i++) { |
|
if (items[i].type != ACPI_TYPE_STRING) |
|
return -EPROTO; |
|
|
|
val[i] = items[i].string.pointer; |
|
} |
|
return nval; |
|
} |
|
|
|
static int acpi_data_prop_read(const struct acpi_device_data *data, |
|
const char *propname, |
|
enum dev_prop_type proptype, |
|
void *val, size_t nval) |
|
{ |
|
const union acpi_object *obj; |
|
const union acpi_object *items; |
|
int ret; |
|
|
|
if (nval == 1 || !val) { |
|
ret = acpi_data_prop_read_single(data, propname, proptype, val); |
|
/* |
|
* The overflow error means that the property is there and it is |
|
* single-value, but its type does not match, so return. |
|
*/ |
|
if (ret >= 0 || ret == -EOVERFLOW) |
|
return ret; |
|
|
|
/* |
|
* Reading this property as a single-value one failed, but its |
|
* value may still be represented as one-element array, so |
|
* continue. |
|
*/ |
|
} |
|
|
|
ret = acpi_data_get_property_array(data, propname, ACPI_TYPE_ANY, &obj); |
|
if (ret) |
|
return ret; |
|
|
|
if (!val) |
|
return obj->package.count; |
|
|
|
if (proptype != DEV_PROP_STRING && nval > obj->package.count) |
|
return -EOVERFLOW; |
|
else if (nval <= 0) |
|
return -EINVAL; |
|
|
|
items = obj->package.elements; |
|
|
|
switch (proptype) { |
|
case DEV_PROP_U8: |
|
ret = acpi_copy_property_array_u8(items, (u8 *)val, nval); |
|
break; |
|
case DEV_PROP_U16: |
|
ret = acpi_copy_property_array_u16(items, (u16 *)val, nval); |
|
break; |
|
case DEV_PROP_U32: |
|
ret = acpi_copy_property_array_u32(items, (u32 *)val, nval); |
|
break; |
|
case DEV_PROP_U64: |
|
ret = acpi_copy_property_array_u64(items, (u64 *)val, nval); |
|
break; |
|
case DEV_PROP_STRING: |
|
ret = acpi_copy_property_array_string( |
|
items, (char **)val, |
|
min_t(u32, nval, obj->package.count)); |
|
break; |
|
default: |
|
ret = -EINVAL; |
|
break; |
|
} |
|
return ret; |
|
} |
|
|
|
/** |
|
* acpi_node_prop_read - retrieve the value of an ACPI property with given name. |
|
* @fwnode: Firmware node to get the property from. |
|
* @propname: Name of the property. |
|
* @proptype: Expected property type. |
|
* @val: Location to store the property value (if not %NULL). |
|
* @nval: Size of the array pointed to by @val. |
|
* |
|
* If @val is %NULL, return the number of array elements comprising the value |
|
* of the property. Otherwise, read at most @nval values to the array at the |
|
* location pointed to by @val. |
|
*/ |
|
static int acpi_node_prop_read(const struct fwnode_handle *fwnode, |
|
const char *propname, enum dev_prop_type proptype, |
|
void *val, size_t nval) |
|
{ |
|
return acpi_data_prop_read(acpi_device_data_of_node(fwnode), |
|
propname, proptype, val, nval); |
|
} |
|
|
|
/** |
|
* acpi_get_next_subnode - Return the next child node handle for a fwnode |
|
* @fwnode: Firmware node to find the next child node for. |
|
* @child: Handle to one of the device's child nodes or a null handle. |
|
*/ |
|
struct fwnode_handle *acpi_get_next_subnode(const struct fwnode_handle *fwnode, |
|
struct fwnode_handle *child) |
|
{ |
|
const struct acpi_device *adev = to_acpi_device_node(fwnode); |
|
const struct list_head *head; |
|
struct list_head *next; |
|
|
|
if (!child || is_acpi_device_node(child)) { |
|
struct acpi_device *child_adev; |
|
|
|
if (adev) |
|
head = &adev->children; |
|
else |
|
goto nondev; |
|
|
|
if (list_empty(head)) |
|
goto nondev; |
|
|
|
if (child) { |
|
adev = to_acpi_device_node(child); |
|
next = adev->node.next; |
|
if (next == head) { |
|
child = NULL; |
|
goto nondev; |
|
} |
|
child_adev = list_entry(next, struct acpi_device, node); |
|
} else { |
|
child_adev = list_first_entry(head, struct acpi_device, |
|
node); |
|
} |
|
return acpi_fwnode_handle(child_adev); |
|
} |
|
|
|
nondev: |
|
if (!child || is_acpi_data_node(child)) { |
|
const struct acpi_data_node *data = to_acpi_data_node(fwnode); |
|
struct acpi_data_node *dn; |
|
|
|
/* |
|
* We can have a combination of device and data nodes, e.g. with |
|
* hierarchical _DSD properties. Make sure the adev pointer is |
|
* restored before going through data nodes, otherwise we will |
|
* be looking for data_nodes below the last device found instead |
|
* of the common fwnode shared by device_nodes and data_nodes. |
|
*/ |
|
adev = to_acpi_device_node(fwnode); |
|
if (adev) |
|
head = &adev->data.subnodes; |
|
else if (data) |
|
head = &data->data.subnodes; |
|
else |
|
return NULL; |
|
|
|
if (list_empty(head)) |
|
return NULL; |
|
|
|
if (child) { |
|
dn = to_acpi_data_node(child); |
|
next = dn->sibling.next; |
|
if (next == head) |
|
return NULL; |
|
|
|
dn = list_entry(next, struct acpi_data_node, sibling); |
|
} else { |
|
dn = list_first_entry(head, struct acpi_data_node, sibling); |
|
} |
|
return &dn->fwnode; |
|
} |
|
return NULL; |
|
} |
|
|
|
/** |
|
* acpi_node_get_parent - Return parent fwnode of this fwnode |
|
* @fwnode: Firmware node whose parent to get |
|
* |
|
* Returns parent node of an ACPI device or data firmware node or %NULL if |
|
* not available. |
|
*/ |
|
struct fwnode_handle *acpi_node_get_parent(const struct fwnode_handle *fwnode) |
|
{ |
|
if (is_acpi_data_node(fwnode)) { |
|
/* All data nodes have parent pointer so just return that */ |
|
return to_acpi_data_node(fwnode)->parent; |
|
} else if (is_acpi_device_node(fwnode)) { |
|
acpi_handle handle, parent_handle; |
|
|
|
handle = to_acpi_device_node(fwnode)->handle; |
|
if (ACPI_SUCCESS(acpi_get_parent(handle, &parent_handle))) { |
|
struct acpi_device *adev; |
|
|
|
if (!acpi_bus_get_device(parent_handle, &adev)) |
|
return acpi_fwnode_handle(adev); |
|
} |
|
} |
|
|
|
return NULL; |
|
} |
|
|
|
/* |
|
* Return true if the node is an ACPI graph node. Called on either ports |
|
* or endpoints. |
|
*/ |
|
static bool is_acpi_graph_node(struct fwnode_handle *fwnode, |
|
const char *str) |
|
{ |
|
unsigned int len = strlen(str); |
|
const char *name; |
|
|
|
if (!len || !is_acpi_data_node(fwnode)) |
|
return false; |
|
|
|
name = to_acpi_data_node(fwnode)->name; |
|
|
|
return (fwnode_property_present(fwnode, "reg") && |
|
!strncmp(name, str, len) && name[len] == '@') || |
|
fwnode_property_present(fwnode, str); |
|
} |
|
|
|
/** |
|
* acpi_graph_get_next_endpoint - Get next endpoint ACPI firmware node |
|
* @fwnode: Pointer to the parent firmware node |
|
* @prev: Previous endpoint node or %NULL to get the first |
|
* |
|
* Looks up next endpoint ACPI firmware node below a given @fwnode. Returns |
|
* %NULL if there is no next endpoint or in case of error. In case of success |
|
* the next endpoint is returned. |
|
*/ |
|
static struct fwnode_handle *acpi_graph_get_next_endpoint( |
|
const struct fwnode_handle *fwnode, struct fwnode_handle *prev) |
|
{ |
|
struct fwnode_handle *port = NULL; |
|
struct fwnode_handle *endpoint; |
|
|
|
if (!prev) { |
|
do { |
|
port = fwnode_get_next_child_node(fwnode, port); |
|
/* |
|
* The names of the port nodes begin with "port@" |
|
* followed by the number of the port node and they also |
|
* have a "reg" property that also has the number of the |
|
* port node. For compatibility reasons a node is also |
|
* recognised as a port node from the "port" property. |
|
*/ |
|
if (is_acpi_graph_node(port, "port")) |
|
break; |
|
} while (port); |
|
} else { |
|
port = fwnode_get_parent(prev); |
|
} |
|
|
|
if (!port) |
|
return NULL; |
|
|
|
endpoint = fwnode_get_next_child_node(port, prev); |
|
while (!endpoint) { |
|
port = fwnode_get_next_child_node(fwnode, port); |
|
if (!port) |
|
break; |
|
if (is_acpi_graph_node(port, "port")) |
|
endpoint = fwnode_get_next_child_node(port, NULL); |
|
} |
|
|
|
/* |
|
* The names of the endpoint nodes begin with "endpoint@" followed by |
|
* the number of the endpoint node and they also have a "reg" property |
|
* that also has the number of the endpoint node. For compatibility |
|
* reasons a node is also recognised as an endpoint node from the |
|
* "endpoint" property. |
|
*/ |
|
if (!is_acpi_graph_node(endpoint, "endpoint")) |
|
return NULL; |
|
|
|
return endpoint; |
|
} |
|
|
|
/** |
|
* acpi_graph_get_child_prop_value - Return a child with a given property value |
|
* @fwnode: device fwnode |
|
* @prop_name: The name of the property to look for |
|
* @val: the desired property value |
|
* |
|
* Return the port node corresponding to a given port number. Returns |
|
* the child node on success, NULL otherwise. |
|
*/ |
|
static struct fwnode_handle *acpi_graph_get_child_prop_value( |
|
const struct fwnode_handle *fwnode, const char *prop_name, |
|
unsigned int val) |
|
{ |
|
struct fwnode_handle *child; |
|
|
|
fwnode_for_each_child_node(fwnode, child) { |
|
u32 nr; |
|
|
|
if (fwnode_property_read_u32(child, prop_name, &nr)) |
|
continue; |
|
|
|
if (val == nr) |
|
return child; |
|
} |
|
|
|
return NULL; |
|
} |
|
|
|
|
|
/** |
|
* acpi_graph_get_remote_endpoint - Parses and returns remote end of an endpoint |
|
* @__fwnode: Endpoint firmware node pointing to a remote device |
|
* |
|
* Returns the remote endpoint corresponding to @__fwnode. NULL on error. |
|
*/ |
|
static struct fwnode_handle * |
|
acpi_graph_get_remote_endpoint(const struct fwnode_handle *__fwnode) |
|
{ |
|
struct fwnode_handle *fwnode; |
|
unsigned int port_nr, endpoint_nr; |
|
struct fwnode_reference_args args; |
|
int ret; |
|
|
|
memset(&args, 0, sizeof(args)); |
|
ret = acpi_node_get_property_reference(__fwnode, "remote-endpoint", 0, |
|
&args); |
|
if (ret) |
|
return NULL; |
|
|
|
/* Direct endpoint reference? */ |
|
if (!is_acpi_device_node(args.fwnode)) |
|
return args.nargs ? NULL : args.fwnode; |
|
|
|
/* |
|
* Always require two arguments with the reference: port and |
|
* endpoint indices. |
|
*/ |
|
if (args.nargs != 2) |
|
return NULL; |
|
|
|
fwnode = args.fwnode; |
|
port_nr = args.args[0]; |
|
endpoint_nr = args.args[1]; |
|
|
|
fwnode = acpi_graph_get_child_prop_value(fwnode, "port", port_nr); |
|
|
|
return acpi_graph_get_child_prop_value(fwnode, "endpoint", endpoint_nr); |
|
} |
|
|
|
static bool acpi_fwnode_device_is_available(const struct fwnode_handle *fwnode) |
|
{ |
|
if (!is_acpi_device_node(fwnode)) |
|
return false; |
|
|
|
return acpi_device_is_present(to_acpi_device_node(fwnode)); |
|
} |
|
|
|
static bool acpi_fwnode_property_present(const struct fwnode_handle *fwnode, |
|
const char *propname) |
|
{ |
|
return !acpi_node_prop_get(fwnode, propname, NULL); |
|
} |
|
|
|
static int |
|
acpi_fwnode_property_read_int_array(const struct fwnode_handle *fwnode, |
|
const char *propname, |
|
unsigned int elem_size, void *val, |
|
size_t nval) |
|
{ |
|
enum dev_prop_type type; |
|
|
|
switch (elem_size) { |
|
case sizeof(u8): |
|
type = DEV_PROP_U8; |
|
break; |
|
case sizeof(u16): |
|
type = DEV_PROP_U16; |
|
break; |
|
case sizeof(u32): |
|
type = DEV_PROP_U32; |
|
break; |
|
case sizeof(u64): |
|
type = DEV_PROP_U64; |
|
break; |
|
default: |
|
return -ENXIO; |
|
} |
|
|
|
return acpi_node_prop_read(fwnode, propname, type, val, nval); |
|
} |
|
|
|
static int |
|
acpi_fwnode_property_read_string_array(const struct fwnode_handle *fwnode, |
|
const char *propname, const char **val, |
|
size_t nval) |
|
{ |
|
return acpi_node_prop_read(fwnode, propname, DEV_PROP_STRING, |
|
val, nval); |
|
} |
|
|
|
static int |
|
acpi_fwnode_get_reference_args(const struct fwnode_handle *fwnode, |
|
const char *prop, const char *nargs_prop, |
|
unsigned int args_count, unsigned int index, |
|
struct fwnode_reference_args *args) |
|
{ |
|
return __acpi_node_get_property_reference(fwnode, prop, index, |
|
args_count, args); |
|
} |
|
|
|
static const char *acpi_fwnode_get_name(const struct fwnode_handle *fwnode) |
|
{ |
|
const struct acpi_device *adev; |
|
struct fwnode_handle *parent; |
|
|
|
/* Is this the root node? */ |
|
parent = fwnode_get_parent(fwnode); |
|
if (!parent) |
|
return "\\"; |
|
|
|
fwnode_handle_put(parent); |
|
|
|
if (is_acpi_data_node(fwnode)) { |
|
const struct acpi_data_node *dn = to_acpi_data_node(fwnode); |
|
|
|
return dn->name; |
|
} |
|
|
|
adev = to_acpi_device_node(fwnode); |
|
if (WARN_ON(!adev)) |
|
return NULL; |
|
|
|
return acpi_device_bid(adev); |
|
} |
|
|
|
static const char * |
|
acpi_fwnode_get_name_prefix(const struct fwnode_handle *fwnode) |
|
{ |
|
struct fwnode_handle *parent; |
|
|
|
/* Is this the root node? */ |
|
parent = fwnode_get_parent(fwnode); |
|
if (!parent) |
|
return ""; |
|
|
|
/* Is this 2nd node from the root? */ |
|
parent = fwnode_get_next_parent(parent); |
|
if (!parent) |
|
return ""; |
|
|
|
fwnode_handle_put(parent); |
|
|
|
/* ACPI device or data node. */ |
|
return "."; |
|
} |
|
|
|
static struct fwnode_handle * |
|
acpi_fwnode_get_parent(struct fwnode_handle *fwnode) |
|
{ |
|
return acpi_node_get_parent(fwnode); |
|
} |
|
|
|
static int acpi_fwnode_graph_parse_endpoint(const struct fwnode_handle *fwnode, |
|
struct fwnode_endpoint *endpoint) |
|
{ |
|
struct fwnode_handle *port_fwnode = fwnode_get_parent(fwnode); |
|
|
|
endpoint->local_fwnode = fwnode; |
|
|
|
if (fwnode_property_read_u32(port_fwnode, "reg", &endpoint->port)) |
|
fwnode_property_read_u32(port_fwnode, "port", &endpoint->port); |
|
if (fwnode_property_read_u32(fwnode, "reg", &endpoint->id)) |
|
fwnode_property_read_u32(fwnode, "endpoint", &endpoint->id); |
|
|
|
return 0; |
|
} |
|
|
|
static const void * |
|
acpi_fwnode_device_get_match_data(const struct fwnode_handle *fwnode, |
|
const struct device *dev) |
|
{ |
|
return acpi_device_get_match_data(dev); |
|
} |
|
|
|
#define DECLARE_ACPI_FWNODE_OPS(ops) \ |
|
const struct fwnode_operations ops = { \ |
|
.device_is_available = acpi_fwnode_device_is_available, \ |
|
.device_get_match_data = acpi_fwnode_device_get_match_data, \ |
|
.property_present = acpi_fwnode_property_present, \ |
|
.property_read_int_array = \ |
|
acpi_fwnode_property_read_int_array, \ |
|
.property_read_string_array = \ |
|
acpi_fwnode_property_read_string_array, \ |
|
.get_parent = acpi_node_get_parent, \ |
|
.get_next_child_node = acpi_get_next_subnode, \ |
|
.get_named_child_node = acpi_fwnode_get_named_child_node, \ |
|
.get_name = acpi_fwnode_get_name, \ |
|
.get_name_prefix = acpi_fwnode_get_name_prefix, \ |
|
.get_reference_args = acpi_fwnode_get_reference_args, \ |
|
.graph_get_next_endpoint = \ |
|
acpi_graph_get_next_endpoint, \ |
|
.graph_get_remote_endpoint = \ |
|
acpi_graph_get_remote_endpoint, \ |
|
.graph_get_port_parent = acpi_fwnode_get_parent, \ |
|
.graph_parse_endpoint = acpi_fwnode_graph_parse_endpoint, \ |
|
}; \ |
|
EXPORT_SYMBOL_GPL(ops) |
|
|
|
DECLARE_ACPI_FWNODE_OPS(acpi_device_fwnode_ops); |
|
DECLARE_ACPI_FWNODE_OPS(acpi_data_fwnode_ops); |
|
const struct fwnode_operations acpi_static_fwnode_ops; |
|
|
|
bool is_acpi_device_node(const struct fwnode_handle *fwnode) |
|
{ |
|
return !IS_ERR_OR_NULL(fwnode) && |
|
fwnode->ops == &acpi_device_fwnode_ops; |
|
} |
|
EXPORT_SYMBOL(is_acpi_device_node); |
|
|
|
bool is_acpi_data_node(const struct fwnode_handle *fwnode) |
|
{ |
|
return !IS_ERR_OR_NULL(fwnode) && fwnode->ops == &acpi_data_fwnode_ops; |
|
} |
|
EXPORT_SYMBOL(is_acpi_data_node);
|
|
|