renesas-rpc-if.h

 1/* SPDX-License-Identifier: GPL-2.0 */
 2/*
 3 * Renesas RPC-IF core driver
 4 *
 5 * Copyright (C) 2018~2019 Renesas Solutions Corp.
 6 * Copyright (C) 2019 Macronix International Co., Ltd.
 7 * Copyright (C) 2019-2020 Cogent Embedded, Inc.
 8 */
 9
10#ifndef __RENESAS_RPC_IF_H
11#define __RENESAS_RPC_IF_H
12
13#include <linux/pm_runtime.h>
14#include <linux/types.h>
15
16enum rpcif_data_dir {
17	RPCIF_NO_DATA,
18	RPCIF_DATA_IN,
19	RPCIF_DATA_OUT,
20};
21
22struct rpcif_op {
23	struct {
24		u8 buswidth;
25		u8 opcode;
26		bool ddr;
27	} cmd, ocmd;
28
29	struct {
30		u8 nbytes;
31		u8 buswidth;
32		bool ddr;
33		u64 val;
34	} addr;
35
36	struct {
37		u8 ncycles;
38		u8 buswidth;
39	} dummy;
40
41	struct {
42		u8 nbytes;
43		u8 buswidth;
44		bool ddr;
45		u32 val;
46	} option;
47
48	struct {
49		u8 buswidth;
50		unsigned int nbytes;
51		enum rpcif_data_dir dir;
52		bool ddr;
53		union {
54			void *in;
55			const void *out;
56		} buf;
57	} data;
58};
59
60enum rpcif_type {
61	RPCIF_RCAR_GEN3,
62	RPCIF_RCAR_GEN4,
63	RPCIF_RZ_G2L,
64	XSPI_RZ_G3E,
65};
66
67struct rpcif {
68	struct device *dev;
69	void __iomem *dirmap;
70	size_t size;
71	bool xspi;
72};
73
74int rpcif_sw_init(struct rpcif *rpc, struct device *dev);
75int rpcif_hw_init(struct device *dev, bool hyperflash);
76void rpcif_prepare(struct device *dev, const struct rpcif_op *op, u64 *offs,
77		   size_t *len);
78int rpcif_manual_xfer(struct device *dev);
79ssize_t rpcif_dirmap_read(struct device *dev, u64 offs, size_t len, void *buf);
80ssize_t xspi_dirmap_write(struct device *dev, u64 offs, size_t len,
81			  const void *buf);
82
83#endif // __RENESAS_RPC_IF_H