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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* (C) Copyright 2017
* Mario Six, Guntermann & Drunck GmbH, mario.six@gdsys.cc
*/
#ifndef _AXI_H_
#define _AXI_H_
enum axi_size_t {
AXI_SIZE_8,
AXI_SIZE_16,
AXI_SIZE_32,
};
/**
* struct axi_ops - driver operations for AXI uclass
*
* Drivers should support these operations unless otherwise noted. These
* operations are intended to be used by uclass code, not directly from
* other code.
*/
struct axi_ops {
/**
* read() - Read a single value from a specified address on a AXI bus
*
* @dev: AXI bus to read from.
* @address: The address to read from.
* @data: Pointer to a variable that takes the data value read
* from the address on the AXI bus.
* @size: The size of the data to be read.
* @return 0 if OK, -ve on error.
*/
int (*read)(struct udevice *dev, ulong address, void *data,
enum axi_size_t size);
/**
* write() - Write a single value to a specified address on a AXI bus
*
* @dev: AXI bus to write to.
* @address: The address to write to.
* @data: Pointer to the data value to be written to the address
* on the AXI bus.
* @size: The size of the data to write.
* @return 0 if OK, -ve on error.
*/
int (*write)(struct udevice *dev, ulong address, void *data,
enum axi_size_t size);
};
#define axi_get_ops(dev) ((struct axi_ops *)(dev)->driver->ops)
/**
* axi_read() - Read a single value from a specified address on a AXI bus
*
* @dev: AXI bus to read from.
* @address: The address to read from.
* @data: Pointer to a variable that takes the data value read from the
* address on the AXI bus.
* @size: The size of the data to write.
* @return 0 if OK, -ve on error.
*/
int axi_read(struct udevice *dev, ulong address, void *data,
enum axi_size_t size);
/**
* axi_write() - Write a single value to a specified address on a AXI bus
*
* @dev: AXI bus to write to.
* @address: The address to write to.
* @data: Pointer to the data value to be written to the address on the
* AXI bus.
* @size: The size of the data to write.
* @return 0 if OK, -ve on error.
*/
int axi_write(struct udevice *dev, ulong address, void *data,
enum axi_size_t size);
#endif
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