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author | Mark Brown <broonie@kernel.org> | 2020-07-01 23:21:32 +0100 |
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committer | Mark Brown <broonie@kernel.org> | 2020-07-01 23:21:32 +0100 |
commit | d93529962d2aaee599157911894af2a791979e9f (patch) | |
tree | 1e45f873258d93a4d8c999bc2b79fec331fb5ffe /include | |
parent | f2d4f106f52068a33c4b65428f53a0b943e1236e (diff) | |
parent | ca7d8b980b67f133317525c4273e144116ee1ae5 (diff) | |
download | linux-stable-d93529962d2aaee599157911894af2a791979e9f.tar.gz linux-stable-d93529962d2aaee599157911894af2a791979e9f.tar.bz2 linux-stable-d93529962d2aaee599157911894af2a791979e9f.zip |
Merge series "Add Renesas RPC-IF support" from Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>:
Hello!
Here's a set of 2 patches against Linus' repo. Renesas Reduced Pin Count
Interface (RPC-IF) allows a SPI flash or HyperFlash connected to the SoC
to be accessed via the external address space read mode or the manual mode.
The memory controller driver for RPC-IF registers either SPI or HyperFLash
subdevice, depending on the contents of the device tree subnode; it also
provides the abstract "back end" API that can be used by the "front end"
SPI/MTD drivers to talk to the real hardware...
Based on the original patch by Mason Yang <masonccyang@mxic.com.tw>.
[1/2] dt-bindings: memory: document Renesas RPC-IF bindings
[2/2] memory: add Renesas RPC-IF driver
MBR, Sergei
Diffstat (limited to 'include')
-rw-r--r-- | include/memory/renesas-rpc-if.h | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/include/memory/renesas-rpc-if.h b/include/memory/renesas-rpc-if.h new file mode 100644 index 000000000000..9ad136682c47 --- /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 |