mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-28 15:41:40 +00:00
185f812c41
Sphinx expects Return: and not @return to indicate a return value.
find . -name '*.c' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;
find . -name '*.h' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
287 lines
8.8 KiB
C
287 lines
8.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Device properties, a temporary data structure for adding to ACPI code
|
|
*
|
|
* Copyright 2019 Google LLC
|
|
* Mostly taken from coreboot file acpi_device.h
|
|
*/
|
|
|
|
#ifndef __ACPI_DP_H
|
|
#define __ACPI_DP_H
|
|
|
|
struct acpi_ctx;
|
|
|
|
#include <acpi/acpi_device.h>
|
|
|
|
/*
|
|
* Writing Device Properties objects via _DSD
|
|
*
|
|
* This is described in ACPI 6.3 section 6.2.5
|
|
*
|
|
* This provides a structure to handle nested device-specific data which ends
|
|
* up in a _DSD table.
|
|
*
|
|
* https://www.kernel.org/doc/html/latest/firmware-guide/acpi/DSD-properties-rules.html
|
|
* https://uefi.org/sites/default/files/resources/_DSD-device-properties-UUID.pdf
|
|
* https://uefi.org/sites/default/files/resources/_DSD-hierarchical-data-extension-UUID-v1.1.pdf
|
|
*
|
|
* The Device Property Hierarchy can be multiple levels deep with multiple
|
|
* children possible in each level. In order to support this flexibility
|
|
* the device property hierarchy must be built up before being written out.
|
|
*
|
|
* For example:
|
|
*
|
|
* Child table with string and integer:
|
|
* struct acpi_dp *child = acpi_dp_new_table("CHLD");
|
|
* acpi_dp_add_string(child, "childstring", "CHILD");
|
|
* acpi_dp_add_integer(child, "childint", 100);
|
|
*
|
|
* _DSD table with integer and gpio and child pointer:
|
|
* struct acpi_dp *dsd = acpi_dp_new_table("_DSD");
|
|
* acpi_dp_add_integer(dsd, "number1", 1);
|
|
* acpi_dp_add_gpio(dsd, "gpio", "\_SB.PCI0.GPIO", 0, 0, 1);
|
|
* acpi_dp_add_child(dsd, "child", child);
|
|
*
|
|
* Write entries into SSDT and clean up resources:
|
|
* acpi_dp_write(dsd);
|
|
*
|
|
* Name(_DSD, Package() {
|
|
* ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301")
|
|
* Package() {
|
|
* Package() { "gpio", Package() { \_SB.PCI0.GPIO, 0, 0, 0 } }
|
|
* Package() { "number1", 1 }
|
|
* }
|
|
* ToUUID("dbb8e3e6-5886-4ba6-8795-1319f52a966b")
|
|
* Package() {
|
|
* Package() { "child", CHLD }
|
|
* }
|
|
* }
|
|
* Name(CHLD, Package() {
|
|
* ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301")
|
|
* Package() {
|
|
* Package() { "childstring", "CHILD" }
|
|
* Package() { "childint", 100 }
|
|
* }
|
|
* }
|
|
*/
|
|
|
|
#define ACPI_DP_UUID "daffd814-6eba-4d8c-8a91-bc9bbf4aa301"
|
|
#define ACPI_DP_CHILD_UUID "dbb8e3e6-5886-4ba6-8795-1319f52a966b"
|
|
|
|
/**
|
|
* enum acpi_dp_type - types of device property objects
|
|
*
|
|
* These refer to the types defined by struct acpi_dp below
|
|
*
|
|
* @ACPI_DP_TYPE_UNKNOWN: Unknown / do not use
|
|
* @ACPI_DP_TYPE_INTEGER: Integer value (u64) in @integer
|
|
* @ACPI_DP_TYPE_STRING: String value in @string
|
|
* @ACPI_DP_TYPE_REFERENCE: Reference to another object, with value in @string
|
|
* @ACPI_DP_TYPE_TABLE: Type for a top-level table which may have children
|
|
* @ACPI_DP_TYPE_ARRAY: Array of items with first item in @array and following
|
|
* items linked from that item's @next
|
|
* @ACPI_DP_TYPE_CHILD: Child object, with siblings in that child's @next
|
|
*/
|
|
enum acpi_dp_type {
|
|
ACPI_DP_TYPE_UNKNOWN,
|
|
ACPI_DP_TYPE_INTEGER,
|
|
ACPI_DP_TYPE_STRING,
|
|
ACPI_DP_TYPE_REFERENCE,
|
|
ACPI_DP_TYPE_TABLE,
|
|
ACPI_DP_TYPE_ARRAY,
|
|
ACPI_DP_TYPE_CHILD,
|
|
};
|
|
|
|
/**
|
|
* struct acpi_dp - ACPI device properties
|
|
*
|
|
* @type: Table type
|
|
* @name: Name of object, typically _DSD but could be CHLD for a child object.
|
|
* This can be NULL if there is no name
|
|
* @next: Next object in list (next array element or next sibling)
|
|
* @child: Pointer to first child, if @type == ACPI_DP_TYPE_CHILD, else NULL
|
|
* @array: First array element, if @type == ACPI_DP_TYPE_ARRAY, else NULL
|
|
* @integer: Integer value of the property, if @type == ACPI_DP_TYPE_INTEGER
|
|
* @string: String value of the property, if @type == ACPI_DP_TYPE_STRING;
|
|
* child name if @type == ACPI_DP_TYPE_CHILD;
|
|
* reference name if @type == ACPI_DP_TYPE_REFERENCE;
|
|
*/
|
|
struct acpi_dp {
|
|
enum acpi_dp_type type;
|
|
const char *name;
|
|
struct acpi_dp *next;
|
|
union {
|
|
struct acpi_dp *child;
|
|
struct acpi_dp *array;
|
|
};
|
|
union {
|
|
u64 integer;
|
|
const char *string;
|
|
};
|
|
};
|
|
|
|
/**
|
|
* acpi_dp_new_table() - Start a new Device Property table
|
|
*
|
|
* @ref: ACPI reference (e.g. "_DSD")
|
|
* Return: pointer to table, or NULL if out of memory
|
|
*/
|
|
struct acpi_dp *acpi_dp_new_table(const char *ref);
|
|
|
|
/**
|
|
* acpi_dp_add_integer() - Add integer Device Property
|
|
*
|
|
* A new node is added to the end of the property list of @dp
|
|
*
|
|
* @dp: Table to add this property to
|
|
* @name: Name of property, or NULL for none
|
|
* @value: Integer value
|
|
* Return: pointer to new node, or NULL if out of memory
|
|
*/
|
|
struct acpi_dp *acpi_dp_add_integer(struct acpi_dp *dp, const char *name,
|
|
u64 value);
|
|
|
|
/**
|
|
* acpi_dp_add_string() - Add string Device Property
|
|
*
|
|
* A new node is added to the end of the property list of @dp
|
|
*
|
|
* @dp: Table to add this property to
|
|
* @name: Name of property, or NULL for none
|
|
* @string: String value
|
|
* Return: pointer to new node, or NULL if out of memory
|
|
*/
|
|
struct acpi_dp *acpi_dp_add_string(struct acpi_dp *dp, const char *name,
|
|
const char *string);
|
|
|
|
/**
|
|
* acpi_dp_add_reference() - Add reference Device Property
|
|
*
|
|
* A new node is added to the end of the property list of @dp
|
|
*
|
|
* @dp: Table to add this property to
|
|
* @name: Name of property, or NULL for none
|
|
* @reference: Reference value
|
|
* Return: pointer to new node, or NULL if out of memory
|
|
*/
|
|
struct acpi_dp *acpi_dp_add_reference(struct acpi_dp *dp, const char *name,
|
|
const char *reference);
|
|
|
|
/**
|
|
* acpi_dp_add_array() - Add array Device Property
|
|
*
|
|
* A new node is added to the end of the property list of @dp, with the array
|
|
* attached to that.
|
|
*
|
|
* @dp: Table to add this property to
|
|
* @name: Name of property, or NULL for none
|
|
* Return: pointer to new node, or NULL if out of memory
|
|
*/
|
|
struct acpi_dp *acpi_dp_add_array(struct acpi_dp *dp, struct acpi_dp *array);
|
|
|
|
/**
|
|
* acpi_dp_add_integer_array() - Add an array of integers
|
|
*
|
|
* A new node is added to the end of the property list of @dp, with the array
|
|
* attached to that. Each element of the array becomes a new node.
|
|
*
|
|
* @dp: Table to add this property to
|
|
* @name: Name of property, or NULL for none
|
|
* Return: pointer to new array node, or NULL if out of memory
|
|
*/
|
|
struct acpi_dp *acpi_dp_add_integer_array(struct acpi_dp *dp, const char *name,
|
|
u64 *array, int len);
|
|
|
|
/**
|
|
* acpi_dp_add_child() - Add a child table of Device Properties
|
|
*
|
|
* A new node is added as a child of @dp
|
|
*
|
|
* @dp: Table to add this child to
|
|
* @name: Name of child, or NULL for none
|
|
* @child: Child node to add
|
|
* Return: pointer to new child node, or NULL if out of memory
|
|
*/
|
|
struct acpi_dp *acpi_dp_add_child(struct acpi_dp *dp, const char *name,
|
|
struct acpi_dp *child);
|
|
|
|
/**
|
|
* acpi_dp_add_gpio() - Add a GPIO to a list of Device Properties
|
|
*
|
|
* A new node is added to the end of the property list of @dp, with the
|
|
* GPIO properties added to the the new node
|
|
*
|
|
* @dp: Table to add this property to
|
|
* @name: Name of property
|
|
* @ref: Reference to device with a _CRS containing GpioIO or GpioInt
|
|
* @index: Index of the GPIO resource in _CRS starting from zero
|
|
* @pin: Pin in the GPIO resource, typically zero
|
|
* @polarity: GPIO polarity. Note that ACPI_IRQ_ACTIVE_BOTH is not supported
|
|
* Return: pointer to new node, or NULL if out of memory
|
|
*/
|
|
struct acpi_dp *acpi_dp_add_gpio(struct acpi_dp *dp, const char *name,
|
|
const char *ref, int index, int pin,
|
|
enum acpi_gpio_polarity polarity);
|
|
|
|
/**
|
|
* acpi_dp_write() - Write Device Property hierarchy and clean up resources
|
|
*
|
|
* This writes the table using acpigen and then frees it
|
|
*
|
|
* @ctx: ACPI context
|
|
* @table: Table to write
|
|
* Return: 0 if OK, -ve on error
|
|
*/
|
|
int acpi_dp_write(struct acpi_ctx *ctx, struct acpi_dp *table);
|
|
|
|
/**
|
|
* acpi_dp_ofnode_copy_int() - Copy a property from device tree to DP
|
|
*
|
|
* This copies an integer property from the device tree to the ACPI DP table.
|
|
*
|
|
* @node: Node to copy from
|
|
* @dp: DP to copy to
|
|
* @prop: Property name to copy
|
|
* Return: 0 if OK, -ve on error
|
|
*/
|
|
int acpi_dp_ofnode_copy_int(ofnode node, struct acpi_dp *dp, const char *prop);
|
|
|
|
/**
|
|
* acpi_dp_ofnode_copy_str() - Copy a property from device tree to DP
|
|
*
|
|
* This copies a string property from the device tree to the ACPI DP table.
|
|
*
|
|
* @node: Node to copy from
|
|
* @dp: DP to copy to
|
|
* @prop: Property name to copy
|
|
* Return: 0 if OK, -ve on error
|
|
*/
|
|
int acpi_dp_ofnode_copy_str(ofnode node, struct acpi_dp *dp, const char *prop);
|
|
|
|
/**
|
|
* acpi_dp_dev_copy_int() - Copy a property from device tree to DP
|
|
*
|
|
* This copies an integer property from the device tree to the ACPI DP table.
|
|
*
|
|
* @dev: Device to copy from
|
|
* @dp: DP to copy to
|
|
* @prop: Property name to copy
|
|
* Return: 0 if OK, -ve on error
|
|
*/
|
|
int acpi_dp_dev_copy_int(const struct udevice *dev, struct acpi_dp *dp,
|
|
const char *prop);
|
|
|
|
/**
|
|
* acpi_dp_dev_copy_str() - Copy a property from device tree to DP
|
|
*
|
|
* This copies a string property from the device tree to the ACPI DP table.
|
|
*
|
|
* @dev: Device to copy from
|
|
* @dp: DP to copy to
|
|
* @prop: Property name to copy
|
|
* Return: 0 if OK, -ve on error
|
|
*/
|
|
int acpi_dp_dev_copy_str(const struct udevice *dev, struct acpi_dp *dp,
|
|
const char *prop);
|
|
|
|
#endif
|