fbb7c90963
[ Upstream commit 51de3fc9a84d8e99dd3f02536a623f9fb95d0c0a ]
The rpcif structure is used as a common data structure, shared by the
RPC-IF core driver and by the HyperBus and SPI child drivers.
This poses several problems:
- Most structure members describe private core driver state, which
should not be accessible by the child drivers,
- The structure's lifetime is controlled by the child drivers,
complicating use by the core driver.
Fix this by moving the private core driver state to its own structure,
managed by the RPC-IF core driver, and store it in the core driver's
private data field. This requires absorbing the child's platform
device, as that was stored in the driver's private data field before.
Fixes: ca7d8b980b ("memory: add Renesas RPC-IF driver")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/09fbb6fa67d5a8cd48a08808c9afa2f6a499aa42.1669213027.git.geert+renesas@glider.be
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
89 lines
1.5 KiB
C
89 lines
1.5 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_RZ_G2L,
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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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};
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int rpcif_sw_init(struct rpcif *rpc, struct device *dev);
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int rpcif_hw_init(struct rpcif *rpc, bool hyperflash);
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void rpcif_prepare(struct rpcif *rpc, const struct rpcif_op *op, u64 *offs,
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size_t *len);
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int rpcif_manual_xfer(struct rpcif *rpc);
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ssize_t rpcif_dirmap_read(struct rpcif *rpc, u64 offs, size_t len, void *buf);
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static inline void rpcif_enable_rpm(struct rpcif *rpc)
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{
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pm_runtime_enable(rpc->dev);
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}
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static inline void rpcif_disable_rpm(struct rpcif *rpc)
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{
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pm_runtime_disable(rpc->dev);
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}
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#endif // __RENESAS_RPC_IF_H
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