75 lines
1.5 KiB
C
75 lines
1.5 KiB
C
/*
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* Copyright (c) 2018 SiFive Inc.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef _SPI_SIFIVE__H
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#define _SPI_SIFIVE__H
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#include "spi_context.h"
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#include <sys/sys_io.h>
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#include <device.h>
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#include <drivers/spi.h>
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#define SPI_CFG(dev) ((struct spi_sifive_cfg *) ((dev)->config_info))
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#define SPI_DATA(dev) ((struct spi_sifive_data *) ((dev)->driver_data))
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#define SPI_REG(dev, offset) ((mem_addr_t) (SPI_CFG(dev)->base + (offset)))
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/* Register Offsets */
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#define REG_SCKDIV 0x000
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#define REG_SCKMODE 0x004
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#define REG_CSID 0x010
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#define REG_CSDEF 0x014
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#define REG_CSMODE 0x018
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#define REG_DELAY0 0x028
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#define REG_DELAY1 0x02C
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#define REG_FMT 0x040
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#define REG_TXDATA 0x048
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#define REG_RXDATA 0x04C
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#define REG_TXMARK 0x050
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#define REG_RXMARK 0x054
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#define REG_FCTRL 0x060
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#define REG_FFMT 0x064
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#define REG_IE 0x070
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#define REG_IP 0x074
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/* Masks */
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#define SF_SCKDIV_DIV_MASK (0xFFF << 0)
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#define SF_FMT_PROTO_MASK (0x3 << 0)
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#define SF_FMT_LEN_MASK (0xF << 16)
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/* Offsets */
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#define SF_SCKMODE_POL 1
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#define SF_SCKMODE_PHA 0
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#define SF_FMT_LEN 16
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#define SF_FMT_ENDIAN 2
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#define SF_FCTRL_EN 0
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/* Values */
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#define SF_CSMODE_AUTO 0
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#define SF_CSMODE_HOLD 2
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#define SF_CSMODE_OFF 3
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#define SF_FMT_PROTO_SINGLE 0
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#define SF_TXDATA_FULL (1 << 31)
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#define SF_RXDATA_EMPTY (1 << 31)
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/* Structure Declarations */
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struct spi_sifive_data {
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struct spi_context ctx;
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};
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struct spi_sifive_cfg {
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uint32_t base;
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uint32_t f_sys;
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};
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#endif /* _SPI_SIFIVE__H */
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