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};
65
66struct rpcif {
67	struct device *dev;
68	void __iomem *dirmap;
69	size_t size;
70};
71
72int rpcif_sw_init(struct rpcif *rpc, struct device *dev);
73int rpcif_hw_init(struct device *dev, bool hyperflash);
74void rpcif_prepare(struct device *dev, const struct rpcif_op *op, u64 *offs,
75		   size_t *len);
76int rpcif_manual_xfer(struct device *dev);
77ssize_t rpcif_dirmap_read(struct device *dev, u64 offs, size_t len, void *buf);
78
79#endif // __RENESAS_RPC_IF_H
80