memory: add Renesas RPC-IF driver

[sfrench/cifs-2.6.git] / include / memory / renesas-rpc-if.h

diff --git a/include/memory/renesas-rpc-if.h b/include/memory/renesas-rpc-if.h
new file mode 100644 (file)
index 0000000..9ad1366
--- /dev/null
+++ b/include/memory/renesas-rpc-if.h
@@ -0,0 +1,87 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Renesas RPC-IF core driver
+ *
+ * Copyright (C) 2018~2019 Renesas Solutions Corp.
+ * Copyright (C) 2019 Macronix International Co., Ltd.
+ * Copyright (C) 2019-2020 Cogent Embedded, Inc.
+ */
+
+#ifndef __RENESAS_RPC_IF_H
+#define __RENESAS_RPC_IF_H
+
+#include <linux/types.h>
+
+enum rpcif_data_dir {
+       RPCIF_NO_DATA,
+       RPCIF_DATA_IN,
+       RPCIF_DATA_OUT,
+};
+
+struct rpcif_op {
+       struct {
+               u8 buswidth;
+               u8 opcode;
+               bool ddr;
+       } cmd, ocmd;
+
+       struct {
+               u8 nbytes;
+               u8 buswidth;
+               bool ddr;
+               u64 val;
+       } addr;
+
+       struct {
+               u8 ncycles;
+               u8 buswidth;
+       } dummy;
+
+       struct {
+               u8 nbytes;
+               u8 buswidth;
+               bool ddr;
+               u32 val;
+       } option;
+
+       struct {
+               u8 buswidth;
+               unsigned int nbytes;
+               enum rpcif_data_dir dir;
+               bool ddr;
+               union {
+                       void *in;
+                       const void *out;
+               } buf;
+       } data;
+};
+
+struct rpcif {
+       struct device *dev;
+       void __iomem *dirmap;
+       struct regmap *regmap;
+       struct reset_control *rstc;
+       size_t size;
+       enum rpcif_data_dir dir;
+       u8 bus_size;
+       void *buffer;
+       u32 xferlen;
+       u32 smcr;
+       u32 smadr;
+       u32 command;            /* DRCMR or SMCMR */
+       u32 option;             /* DROPR or SMOPR */
+       u32 enable;             /* DRENR or SMENR */
+       u32 dummy;              /* DRDMCR or SMDMCR */
+       u32 ddr;                /* DRDRENR or SMDRENR */
+};
+
+int  rpcif_sw_init(struct rpcif *rpc, struct device *dev);
+void rpcif_hw_init(struct rpcif *rpc, bool hyperflash);
+void rpcif_enable_rpm(struct rpcif *rpc);
+void rpcif_disable_rpm(struct rpcif *rpc);
+void rpcif_prepare(struct rpcif *rpc, const struct rpcif_op *op, u64 *offs,
+                  size_t *len);
+int rpcif_manual_xfer(struct rpcif *rpc);
+ssize_t rpcif_dirmap_read(struct rpcif *rpc, u64 offs, size_t len, void *buf);
+
+#endif // __RENESAS_RPC_IF_H