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
16 enum rpcif_data_dir {
17 RPCIF_NO_DATA,
18 RPCIF_DATA_IN,
19 RPCIF_DATA_OUT,
20 };
21
22 struct 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
60 enum rpcif_type {
61 RPCIF_RCAR_GEN3,
62 RPCIF_RCAR_GEN4,
63 RPCIF_RZ_G2L,
64 };
65
66 struct rpcif {
67 struct device *dev;
68 void __iomem *dirmap;
69 size_t size;
70 };
71
72 int rpcif_sw_init(struct rpcif *rpc, struct device *dev);
73 int rpcif_hw_init(struct device *dev, bool hyperflash);
74 void rpcif_prepare(struct device *dev, const struct rpcif_op *op, u64 *offs,
75 size_t *len);
76 int rpcif_manual_xfer(struct device *dev);
77 ssize_t rpcif_dirmap_read(struct device *dev, u64 offs, size_t len, void *buf);
78
79 #endif // __RENESAS_RPC_IF_H
80
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