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/types.h>
  14
  15 enum rpcif_data_dir {
  16         RPCIF_NO_DATA,
  17         RPCIF_DATA_IN,
  18         RPCIF_DATA_OUT,
  19 };
  20
  21 struct  rpcif_op {
  22         struct {
  23                 u8 buswidth;
  24                 u8 opcode;
  25                 bool ddr;
  26         } cmd, ocmd;
  27
  28         struct {
  29                 u8 nbytes;
  30                 u8 buswidth;
  31                 bool ddr;
  32                 u64 val;
  33         } addr;
  34
  35         struct {
  36                 u8 ncycles;
  37                 u8 buswidth;
  38         } dummy;
  39
  40         struct {
  41                 u8 nbytes;
  42                 u8 buswidth;
  43                 bool ddr;
  44                 u32 val;
  45         } option;
  46
  47         struct {
  48                 u8 buswidth;
  49                 unsigned int nbytes;
  50                 enum rpcif_data_dir dir;
  51                 bool ddr;
  52                 union {
  53                         void *in;
  54                         const void *out;
  55                 } buf;
  56         } data;
  57 };
  58
  59 struct  rpcif {
  60         struct device *dev;
  61         void __iomem *dirmap;
  62         struct regmap *regmap;
  63         struct reset_control *rstc;
  64         size_t size;
  65         enum rpcif_data_dir dir;
  66         u8 bus_size;
  67         void *buffer;
  68         u32 xferlen;
  69         u32 smcr;
  70         u32 smadr;
  71         u32 command;            /* DRCMR or SMCMR */
  72         u32 option;             /* DROPR or SMOPR */
  73         u32 enable;             /* DRENR or SMENR */
  74         u32 dummy;              /* DRDMCR or SMDMCR */
  75         u32 ddr;                /* DRDRENR or SMDRENR */
  76 };
  77
  78 int  rpcif_sw_init(struct rpcif *rpc, struct device *dev);
  79 void rpcif_hw_init(struct rpcif *rpc, bool hyperflash);
  80 void rpcif_enable_rpm(struct rpcif *rpc);
  81 void rpcif_disable_rpm(struct rpcif *rpc);
  82 void rpcif_prepare(struct rpcif *rpc, const struct rpcif_op *op, u64 *offs,
  83                    size_t *len);
  84 int rpcif_manual_xfer(struct rpcif *rpc);
  85 ssize_t rpcif_dirmap_read(struct rpcif *rpc, u64 offs, size_t len, void *buf);
  86
  87 #endif // __RENESAS_RPC_IF_H