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687cac9559
Add support for RZ/G3E xSPI. Compared to RPC-IF, it can support writes on memory-mapped area. Introduce struct rpcif_impl for holding the function pointers and data to handle the differences between xspi and rpc-if interface. Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com> Link: https://lore.kernel.org/r/20250424090000.136804-7-biju.das.jz@bp.renesas.com Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
83 lines
1.4 KiB
C
83 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Renesas RPC-IF core driver
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*
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* Copyright (C) 2018~2019 Renesas Solutions Corp.
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* Copyright (C) 2019 Macronix International Co., Ltd.
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* Copyright (C) 2019-2020 Cogent Embedded, Inc.
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*/
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#ifndef __RENESAS_RPC_IF_H
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#define __RENESAS_RPC_IF_H
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#include <linux/pm_runtime.h>
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#include <linux/types.h>
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enum rpcif_data_dir {
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RPCIF_NO_DATA,
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RPCIF_DATA_IN,
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RPCIF_DATA_OUT,
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};
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struct rpcif_op {
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struct {
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u8 buswidth;
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u8 opcode;
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bool ddr;
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} cmd, ocmd;
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struct {
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u8 nbytes;
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u8 buswidth;
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bool ddr;
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u64 val;
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} addr;
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struct {
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u8 ncycles;
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u8 buswidth;
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} dummy;
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struct {
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u8 nbytes;
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u8 buswidth;
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bool ddr;
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u32 val;
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} option;
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struct {
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u8 buswidth;
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unsigned int nbytes;
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enum rpcif_data_dir dir;
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bool ddr;
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union {
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void *in;
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const void *out;
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} buf;
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} data;
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};
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enum rpcif_type {
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RPCIF_RCAR_GEN3,
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RPCIF_RCAR_GEN4,
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RPCIF_RZ_G2L,
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XSPI_RZ_G3E,
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};
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struct rpcif {
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struct device *dev;
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void __iomem *dirmap;
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size_t size;
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bool xspi;
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};
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int rpcif_sw_init(struct rpcif *rpc, struct device *dev);
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int rpcif_hw_init(struct device *dev, bool hyperflash);
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void rpcif_prepare(struct device *dev, const struct rpcif_op *op, u64 *offs,
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size_t *len);
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int rpcif_manual_xfer(struct device *dev);
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ssize_t rpcif_dirmap_read(struct device *dev, u64 offs, size_t len, void *buf);
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ssize_t xspi_dirmap_write(struct device *dev, u64 offs, size_t len,
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const void *buf);
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#endif // __RENESAS_RPC_IF_H
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