LXR linux/include/memory/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
  97