u-boot/include/acpi/acpigen.h
Simon Glass bb6772c3ff acpi: Support writing named values
Allow writing named integers and strings to the generated ACPI code.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Wolfgang Wallner <wolfgang.wallner@br-automation.com>
[bmeng: Fix the "new blank line at EOF" warning]
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
2020-07-17 14:32:24 +08:00

566 lines
15 KiB
C

/* SPDX-License-Identifier: GPL-2.0 */
/*
* Core ACPI (Advanced Configuration and Power Interface) support
*
* Copyright 2019 Google LLC
*
* Modified from coreboot file acpigen.h
*/
#ifndef __ACPI_ACPIGEN_H
#define __ACPI_ACPIGEN_H
#include <linux/types.h>
struct acpi_ctx;
struct acpi_gen_regaddr;
struct acpi_gpio;
/* Top 4 bits of the value used to indicate a three-byte length value */
#define ACPI_PKG_LEN_3_BYTES 0x80
#define ACPI_METHOD_NARGS_MASK 0x7
#define ACPI_METHOD_SERIALIZED_MASK BIT(3)
#define ACPI_END_TAG 0x79
/* ACPI Op/Prefix codes */
enum {
ZERO_OP = 0x00,
ONE_OP = 0x01,
NAME_OP = 0x08,
BYTE_PREFIX = 0x0a,
WORD_PREFIX = 0x0b,
DWORD_PREFIX = 0x0c,
STRING_PREFIX = 0x0d,
QWORD_PREFIX = 0x0e,
SCOPE_OP = 0x10,
BUFFER_OP = 0x11,
PACKAGE_OP = 0x12,
METHOD_OP = 0x14,
SLEEP_OP = 0x22,
DUAL_NAME_PREFIX = 0x2e,
MULTI_NAME_PREFIX = 0x2f,
DEBUG_OP = 0x31,
EXT_OP_PREFIX = 0x5b,
ROOT_PREFIX = 0x5c,
LOCAL0_OP = 0x60,
LOCAL1_OP = 0x61,
LOCAL2_OP = 0x62,
LOCAL3_OP = 0x63,
LOCAL4_OP = 0x64,
LOCAL5_OP = 0x65,
LOCAL6_OP = 0x66,
LOCAL7_OP = 0x67,
STORE_OP = 0x70,
AND_OP = 0x7b,
OR_OP = 0x7d,
NOT_OP = 0x80,
DEVICE_OP = 0x82,
POWER_RES_OP = 0x84,
RETURN_OP = 0xa4,
};
/**
* acpigen_get_current() - Get the current ACPI code output pointer
*
* @ctx: ACPI context pointer
* @return output pointer
*/
u8 *acpigen_get_current(struct acpi_ctx *ctx);
/**
* acpigen_emit_byte() - Emit a byte to the ACPI code
*
* @ctx: ACPI context pointer
* @data: Value to output
*/
void acpigen_emit_byte(struct acpi_ctx *ctx, uint data);
/**
* acpigen_emit_word() - Emit a 16-bit word to the ACPI code
*
* @ctx: ACPI context pointer
* @data: Value to output
*/
void acpigen_emit_word(struct acpi_ctx *ctx, uint data);
/**
* acpigen_emit_dword() - Emit a 32-bit 'double word' to the ACPI code
*
* @ctx: ACPI context pointer
* @data: Value to output
*/
void acpigen_emit_dword(struct acpi_ctx *ctx, uint data);
/**
* acpigen_emit_stream() - Emit a stream of bytes
*
* @ctx: ACPI context pointer
* @data: Data to output
* @size: Size of data in bytes
*/
void acpigen_emit_stream(struct acpi_ctx *ctx, const char *data, int size);
/**
* acpigen_emit_string() - Emit a string
*
* Emit a string with a null terminator
*
* @ctx: ACPI context pointer
* @str: String to output, or NULL for an empty string
*/
void acpigen_emit_string(struct acpi_ctx *ctx, const char *str);
/**
* acpigen_write_len_f() - Write a 'forward' length placeholder
*
* This adds space for a length value in the ACPI stream and pushes the current
* position (before the length) on the stack. After calling this you can write
* some data and then call acpigen_pop_len() to update the length value.
*
* Usage:
*
* acpigen_write_len_f() ------\
* acpigen_write...() |
* acpigen_write...() |
* acpigen_write_len_f() --\ |
* acpigen_write...() | |
* acpigen_write...() | |
* acpigen_pop_len() ------/ |
* acpigen_write...() |
* acpigen_pop_len() ----------/
*
* See ACPI 6.3 section 20.2.4 Package Length Encoding
*
* This implementation always uses a 3-byte packet length for simplicity. It
* could be adjusted to support other lengths.
*
* @ctx: ACPI context pointer
*/
void acpigen_write_len_f(struct acpi_ctx *ctx);
/**
* acpigen_pop_len() - Update the previously stacked length placeholder
*
* Call this after the data for the block has been written. It updates the
* top length value in the stack and pops it off.
*
* @ctx: ACPI context pointer
*/
void acpigen_pop_len(struct acpi_ctx *ctx);
/**
* acpigen_write_package() - Start writing a package
*
* A package collects together a number of elements in the ACPI code. To write
* a package use:
*
* acpigen_write_package(ctx, 3);
* ...write things
* acpigen_pop_len()
*
* If you don't know the number of elements in advance, acpigen_write_package()
* returns a pointer to the value so you can update it later:
*
* char *num_elements = acpigen_write_package(ctx, 0);
* ...write things
* *num_elements += 1;
* ...write things
* *num_elements += 1;
* acpigen_pop_len()
*
* @ctx: ACPI context pointer
* @nr_el: Number of elements (0 if not known)
* @returns pointer to the number of elements, which can be updated by the
* caller if needed
*/
char *acpigen_write_package(struct acpi_ctx *ctx, int nr_el);
/**
* acpigen_write_byte() - Write a byte
*
* @ctx: ACPI context pointer
* @data: Value to write
*/
void acpigen_write_byte(struct acpi_ctx *ctx, unsigned int data);
/**
* acpigen_write_word() - Write a word
*
* @ctx: ACPI context pointer
* @data: Value to write
*/
void acpigen_write_word(struct acpi_ctx *ctx, unsigned int data);
/**
* acpigen_write_dword() - Write a dword
*
* @ctx: ACPI context pointer
* @data: Value to write
*/
void acpigen_write_dword(struct acpi_ctx *ctx, unsigned int data);
/**
* acpigen_write_qword() - Write a qword
*
* @ctx: ACPI context pointer
* @data: Value to write
*/
void acpigen_write_qword(struct acpi_ctx *ctx, u64 data);
/**
* acpigen_write_zero() - Write zero
*
* @ctx: ACPI context pointer
*/
void acpigen_write_zero(struct acpi_ctx *ctx);
/**
* acpigen_write_one() - Write one
*
* @ctx: ACPI context pointer
*/
void acpigen_write_one(struct acpi_ctx *ctx);
/**
* acpigen_write_integer() - Write an integer
*
* This writes an operation (BYTE_OP, WORD_OP, DWORD_OP, QWORD_OP depending on
* the integer size) and an integer value. Note that WORD means 16 bits in ACPI.
*
* @ctx: ACPI context pointer
* @data: Integer to write
*/
void acpigen_write_integer(struct acpi_ctx *ctx, u64 data);
/**
* acpigen_write_name_zero() - Write a named zero value
*
* @ctx: ACPI context pointer
* @name: Name of the value
*/
void acpigen_write_name_zero(struct acpi_ctx *ctx, const char *name);
/**
* acpigen_write_name_one() - Write a named one value
*
* @ctx: ACPI context pointer
* @name: Name of the value
*/
void acpigen_write_name_one(struct acpi_ctx *ctx, const char *name);
/**
* acpigen_write_name_byte() - Write a named byte value
*
* @ctx: ACPI context pointer
* @name: Name of the value
* @val: Value to write
*/
void acpigen_write_name_byte(struct acpi_ctx *ctx, const char *name, uint val);
/**
* acpigen_write_name_word() - Write a named word value
*
* @ctx: ACPI context pointer
* @name: Name of the value
* @val: Value to write
*/
void acpigen_write_name_word(struct acpi_ctx *ctx, const char *name, uint val);
/**
* acpigen_write_name_dword() - Write a named dword value
*
* @ctx: ACPI context pointer
* @name: Name of the value
* @val: Value to write
*/
void acpigen_write_name_dword(struct acpi_ctx *ctx, const char *name, uint val);
/**
* acpigen_write_name_qword() - Write a named qword value
*
* @ctx: ACPI context pointer
* @name: Name of the value
* @val: Value to write
*/
void acpigen_write_name_qword(struct acpi_ctx *ctx, const char *name, u64 val);
/**
* acpigen_write_name_integer() - Write a named integer value
*
* @ctx: ACPI context pointer
* @name: Name of the value
* @val: Value to write
*/
void acpigen_write_name_integer(struct acpi_ctx *ctx, const char *name,
u64 val);
/**
* acpigen_write_name_string() - Write a named string value
*
* @ctx: ACPI context pointer
* @name: Name of the value
* @string: String to write
*/
void acpigen_write_name_string(struct acpi_ctx *ctx, const char *name,
const char *string);
/**
* acpigen_write_string() - Write a string
*
* This writes a STRING_PREFIX followed by a null-terminated string
*
* @ctx: ACPI context pointer
* @str: String to write
*/
void acpigen_write_string(struct acpi_ctx *ctx, const char *str);
/**
* acpigen_emit_namestring() - Emit an ACPI name
*
* This writes out an ACPI name or path in the required special format. It does
* not add the NAME_OP prefix.
*
* @ctx: ACPI context pointer
* @namepath: Name / path to emit
*/
void acpigen_emit_namestring(struct acpi_ctx *ctx, const char *namepath);
/**
* acpigen_write_name() - Write out an ACPI name
*
* This writes out an ACPI name or path in the required special format with a
* NAME_OP prefix.
*
* @ctx: ACPI context pointer
* @namepath: Name / path to emit
*/
void acpigen_write_name(struct acpi_ctx *ctx, const char *namepath);
/**
* acpigen_write_scope() - Write a scope
*
* @ctx: ACPI context pointer
* @scope: Scope to write (e.g. "\\_SB.ABCD")
*/
void acpigen_write_scope(struct acpi_ctx *ctx, const char *scope);
/**
* acpigen_write_uuid() - Write a UUID
*
* This writes out a UUID in the format used by ACPI, with a BUFFER_OP prefix.
*
* @ctx: ACPI context pointer
* @uuid: UUID to write in the form aabbccdd-eeff-gghh-iijj-kkllmmnnoopp
* @return 0 if OK, -EINVAL if the format is incorrect
*/
int acpigen_write_uuid(struct acpi_ctx *ctx, const char *uuid);
/**
* acpigen_emit_ext_op() - Emit an extended op with the EXT_OP_PREFIX prefix
*
* @ctx: ACPI context pointer
* @op: Operation code (e.g. SLEEP_OP)
*/
void acpigen_emit_ext_op(struct acpi_ctx *ctx, uint op);
/**
* acpigen_write_method() - Write a method header
*
* @ctx: ACPI context pointer
* @name: Method name (4 characters)
* @nargs: Number of method arguments (0 if none)
*/
void acpigen_write_method(struct acpi_ctx *ctx, const char *name, int nargs);
/**
* acpigen_write_method_serialized() - Write a method header
*
* This sets the 'serialized' flag so that the method is thread-safe
*
* @ctx: ACPI context pointer
* @name: Method name (4 characters)
* @nargs: Number of method arguments (0 if none)
*/
void acpigen_write_method_serialized(struct acpi_ctx *ctx, const char *name,
int nargs);
/**
* acpigen_write_device() - Write an ACPI device
*
* @ctx: ACPI context pointer
* @name: Device name to write
*/
void acpigen_write_device(struct acpi_ctx *ctx, const char *name);
/**
* acpigen_write_sta() - Write a _STA method
*
* @ctx: ACPI context pointer
* @status: Status value to return
*/
void acpigen_write_sta(struct acpi_ctx *ctx, uint status);
/**
* acpigen_write_resourcetemplate_header() - Write a ResourceTemplate header
*
* @ctx: ACPI context pointer
*/
void acpigen_write_resourcetemplate_header(struct acpi_ctx *ctx);
/**
* acpigen_write_resourcetemplate_footer() - Write a ResourceTemplate footer
*
* @ctx: ACPI context pointer
*/
void acpigen_write_resourcetemplate_footer(struct acpi_ctx *ctx);
/**
* acpigen_write_register_resource() - Write a register resource
*
* This writes a header, the address information and a footer
*
* @ctx: ACPI context pointer
* @addr: Address to write
*/
void acpigen_write_register_resource(struct acpi_ctx *ctx,
const struct acpi_gen_regaddr *addr);
/**
* acpigen_write_sleep() - Write a sleep operation
*
* @ctx: ACPI context pointer
* @sleep_ms: Number of milliseconds to sleep for
*/
void acpigen_write_sleep(struct acpi_ctx *ctx, u64 sleep_ms);
/**
* acpigen_write_store() - Write a store operation
*
* @ctx: ACPI context pointer
*/
void acpigen_write_store(struct acpi_ctx *ctx);
/**
* acpigen_write_debug_string() - Write a debug string
*
* This writes a debug operation with an associated string
*
* @ctx: ACPI context pointer
* @str: String to write
*/
void acpigen_write_debug_string(struct acpi_ctx *ctx, const char *str);
/**
* acpigen_write_or() - Write a bitwise OR operation
*
* res = arg1 | arg2
*
* @ctx: ACPI context pointer
* @arg1: ACPI opcode for operand 1 (e.g. LOCAL0_OP)
* @arg2: ACPI opcode for operand 2 (e.g. LOCAL1_OP)
* @res: ACPI opcode for result (e.g. LOCAL2_OP)
*/
void acpigen_write_or(struct acpi_ctx *ctx, u8 arg1, u8 arg2, u8 res);
/**
* acpigen_write_and() - Write a bitwise AND operation
*
* res = arg1 & arg2
*
* @ctx: ACPI context pointer
* @arg1: ACPI opcode for operand 1 (e.g. LOCAL0_OP)
* @arg2: ACPI opcode for operand 2 (e.g. LOCAL1_OP)
* @res: ACPI opcode for result (e.g. LOCAL2_OP)
*/
void acpigen_write_and(struct acpi_ctx *ctx, u8 arg1, u8 arg2, u8 res);
/**
* acpigen_write_not() - Write a bitwise NOT operation
*
* res = ~arg1
*
* @ctx: ACPI context pointer
* @arg: ACPI opcode for operand (e.g. LOCAL0_OP)
* @res: ACPI opcode for result (e.g. LOCAL2_OP)
*/
void acpigen_write_not(struct acpi_ctx *ctx, u8 arg, u8 res);
/**
* acpigen_write_power_res() - Write a power resource
*
* Name (_PRx, Package(One) { name })
* ...
* PowerResource (name, level, order)
*
* The caller should fill in the rest of the power resource and then call
* acpigen_pop_len() to close it off
*
* @ctx: ACPI context pointer
* @name: Name of power resource (e.g. "PRIC")
* @level: Deepest sleep level that this resource must be kept on (0=S0, 3=S3)
* @order: Order that this must be enabled/disabled (e.g. 0)
* @dev_stats: List of states to define, e.g. {"_PR0", "_PR3"}
* @dev_states_count: Number of dev states
*/
void acpigen_write_power_res(struct acpi_ctx *ctx, const char *name, uint level,
uint order, const char *const dev_states[],
size_t dev_states_count);
/**
* acpigen_set_enable_tx_gpio() - Emit ACPI code to enable/disable a GPIO
*
* This emits code to either enable to disable a Tx GPIO. It takes account of
* the GPIO polarity.
*
* The code needs access to the DW0 register for the pad being used. This is
* provided by gpio->pin0_addr and ACPI methods must be defined for the board
* which can read and write the pad's DW0 register given this address:
* @dw0_read: takes a single argument, the DW0 address
* returns the DW0 value
* @dw0:write: takes two arguments, the DW0 address and the value to write
* no return value
*
* Example code (-- means comment):
*
* -- Get Pad Configuration DW0 register value
* Method (GPC0, 0x1, Serialized)
* {
* -- Arg0 - GPIO DW0 address
* Store (Arg0, Local0)
* OperationRegion (PDW0, SystemMemory, Local0, 4)
* Field (PDW0, AnyAcc, NoLock, Preserve) {
* TEMP, 32
* }
* Return (TEMP)
* }
*
* -- Set Pad Configuration DW0 register value
* Method (SPC0, 0x2, Serialized)
* {
* -- Arg0 - GPIO DW0 address
* -- Arg1 - Value for DW0 register
* Store (Arg0, Local0)
* OperationRegion (PDW0, SystemMemory, Local0, 4)
* Field (PDW0, AnyAcc, NoLock, Preserve) {
* TEMP,32
* }
* Store (Arg1, TEMP)
* }
*
*
* @ctx: ACPI context pointer
* @tx_state_val: Mask to use to toggle the TX state on the GPIO pin, e,g.
* PAD_CFG0_TX_STATE
* @dw0_read: Method name to use to read dw0, e.g. "\\_SB.GPC0"
* @dw0_write: Method name to use to read dw0, e.g. "\\_SB.SPC0"
* @gpio: GPIO to change
* @enable: true to enable GPIO, false to disable
* Returns 0 on success, -ve on error.
*/
int acpigen_set_enable_tx_gpio(struct acpi_ctx *ctx, u32 tx_state_val,
const char *dw0_read, const char *dw0_write,
struct acpi_gpio *gpio, bool enable);
#endif