/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Renesas RPC-IF core driver
 *
 * Copyright (C) 2018~2019 Renesas Solutions Corp.
 * Copyright (C) 2019 Macronix International Co., Ltd.
 * Copyright (C) 2019-2020 Cogent Embedded, Inc.
 */

#ifndef __RENESAS_RPC_IF_H
#define __RENESAS_RPC_IF_H

#include <linux/pm_runtime.h>
#include <linux/types.h>

enum rpcif_data_dir {
        RPCIF_NO_DATA,
        RPCIF_DATA_IN,
        RPCIF_DATA_OUT,
};

struct rpcif_op {
        struct {
                u8 buswidth;
                u8 opcode;
                bool ddr;
        } cmd, ocmd;

        struct {
                u8 nbytes;
                u8 buswidth;
                bool ddr;
                u64 val;
        } addr;

        struct {
                u8 ncycles;
                u8 buswidth;
        } dummy;

        struct {
                u8 nbytes;
                u8 buswidth;
                bool ddr;
                u32 val;
        } option;

        struct {
                u8 buswidth;
                unsigned int nbytes;
                enum rpcif_data_dir dir;
                bool ddr;
                union {
                        void *in;
                        const void *out;
                } buf;
        } data;
};

enum rpcif_type {
        RPCIF_RCAR_GEN3,
        RPCIF_RCAR_GEN4,
        RPCIF_RZ_G2L,
        XSPI_RZ_G3E,
};

struct rpcif {
        struct device *dev;
        void __iomem *dirmap;
        size_t size;
        bool xspi;
};

int rpcif_sw_init(struct rpcif *rpc, struct device *dev);
int rpcif_hw_init(struct device *dev, bool hyperflash);
void rpcif_prepare(struct device *dev, const struct rpcif_op *op, u64 *offs,
                   size_t *len);
int rpcif_manual_xfer(struct device *dev);
ssize_t rpcif_dirmap_read(struct device *dev, u64 offs, size_t len, void *buf);
ssize_t xspi_dirmap_write(struct device *dev, u64 offs, size_t len,
                          const void *buf);

#endif // __RENESAS_RPC_IF_H