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
  16 enum rpcif_data_dir {
  17         RPCIF_NO_DATA,
  18         RPCIF_DATA_IN,
  19         RPCIF_DATA_OUT,
  20 };
  21
  22 struct 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
  60 enum rpcif_type {
  61         RPCIF_RCAR_GEN3,
  62         RPCIF_RCAR_GEN4,
  63         RPCIF_RZ_G2L,
  64 };
  65
  66 struct rpcif {
  67         struct device *dev;
  68         void __iomem *dirmap;
  69         size_t size;
  70 };
  71
  72 int rpcif_sw_init(struct rpcif *rpc, struct device *dev);
  73 int rpcif_hw_init(struct device *dev, bool hyperflash);
  74 void rpcif_prepare(struct device *dev, const struct rpcif_op *op, u64 *offs,
  75                    size_t *len);
  76 int rpcif_manual_xfer(struct device *dev);
  77 ssize_t rpcif_dirmap_read(struct device *dev, u64 offs, size_t len, void *buf);
  78
  79 #endif // __RENESAS_RPC_IF_H