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

 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
 
 
 
 
 
 
60struct rpcif {
61	struct device *dev;
62	void __iomem *dirmap;
63	struct regmap *regmap;
64	struct reset_control *rstc;
65	size_t size;
66	enum rpcif_data_dir dir;
67	u8 bus_size;
68	void *buffer;
69	u32 xferlen;
70	u32 smcr;
71	u32 smadr;
72	u32 command;		/* DRCMR or SMCMR */
73	u32 option;		/* DROPR or SMOPR */
74	u32 enable;		/* DRENR or SMENR */
75	u32 dummy;		/* DRDMCR or SMDMCR */
76	u32 ddr;		/* DRDRENR or SMDRENR */
77};
78
79int rpcif_sw_init(struct rpcif *rpc, struct device *dev);
80void rpcif_hw_init(struct rpcif *rpc, bool hyperflash);
81void rpcif_prepare(struct rpcif *rpc, const struct rpcif_op *op, u64 *offs,
82		   size_t *len);
83int rpcif_manual_xfer(struct rpcif *rpc);
84ssize_t rpcif_dirmap_read(struct rpcif *rpc, u64 offs, size_t len, void *buf);
85
86static inline void rpcif_enable_rpm(struct rpcif *rpc)
87{
88	pm_runtime_enable(rpc->dev);
89}
90
91static inline void rpcif_disable_rpm(struct rpcif *rpc)
92{
93	pm_runtime_disable(rpc->dev);
94}
95
96#endif // __RENESAS_RPC_IF_H