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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 | /* SPDX-License-Identifier: GPL-2.0+ */ /* * (C) Copyright 2017, 2018 * Mario Six, Guntermann & Drunck GmbH, mario.six@gdsys.cc */ #ifndef _AXI_H_ #define _AXI_H_ #include <linux/types.h> struct udevice; /** * enum axi_size_t - Determine size of AXI transfer * @AXI_SIZE_8: AXI sransfer is 8-bit wide * @AXI_SIZE_16: AXI sransfer is 16-bit wide * @AXI_SIZE_32: AXI sransfer is 32-bit wide */ enum axi_size_t { AXI_SIZE_8, AXI_SIZE_16, AXI_SIZE_32, }; 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); struct axi_emul_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); /** * get_store() - Get address of internal storage of a emulated AXI * device * @dev: Emulated AXI device to get the pointer of the internal * storage for. * @storep: Pointer to the internal storage of the emulated AXI * device. * * Return: 0 if OK, -ve on error. */ int (*get_store)(struct udevice *dev, u8 **storep); }; #endif |