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