rt-thread-official/bsp/raspberry-pi/raspi3-32/driver/drv_spi.h

/*
 * Copyright (c) 2006-2021, RT-Thread Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author         Notes
 * 2019-07-29     zdzn           first version
 */

#ifndef __DRV_SPI_H__
#define __DRV_SPI_H__

#include <rtthread.h>
#include <rtdevice.h>

//#include <drivers/spi.h>
#include "board.h"

#define SPI0_BASE_ADDR     (PER_BASE + BCM283X_SPI0_BASE)

static rt_uint8_t raspi_byte_reverse_table[] =
{
    0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
    0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,
    0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8,
    0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8,
    0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4,
    0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,
    0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec,
    0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc,
    0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2,
    0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2,
    0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea,
    0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
    0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6,
    0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,
    0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,
    0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe,
    0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1,
    0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,
    0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9,
    0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9,
    0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5,
    0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,
    0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed,
    0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,
    0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3,
    0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3,
    0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb,
    0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb,
    0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7,
    0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,
    0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef,
    0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff
};

#define    SPI_CORE_CLK    250000000U
#define    SPI_CS        0x00
#define    SPI_CS_LEN_LONG        (1 << 25)
#define    SPI_CS_DMA_LEN        (1 << 24)
#define    SPI_CS_CSPOL2        (1 << 23)
#define    SPI_CS_CSPOL1        (1 << 22)
#define    SPI_CS_CSPOL0        (1 << 21)
#define    SPI_CS_RXF        (1 << 20)
#define    SPI_CS_RXR        (1 << 19)
#define    SPI_CS_TXD        (1 << 18)
#define    SPI_CS_RXD        (1 << 17)
#define    SPI_CS_DONE        (1 << 16)
#define    SPI_CS_LEN        (1 << 13)
#define    SPI_CS_REN        (1 << 12)
#define    SPI_CS_ADCS        (1 << 11)
#define    SPI_CS_INTR        (1 << 10)
#define    SPI_CS_INTD        (1 << 9)
#define    SPI_CS_DMAEN        (1 << 8)
#define    SPI_CS_TA        (1 << 7)
#define    SPI_CS_CSPOL        (1 << 6)
#define    SPI_CS_CLEAR_RXFIFO    (1 << 5)
#define    SPI_CS_CLEAR_TXFIFO    (1 << 4)
#define    SPI_CS_CPOL        (1 << 3)
#define    SPI_CS_CPHA        (1 << 2)
#define    SPI_CS_MASK        0x3
#define    SPI_FIFO    0x04
#define    SPI_CLK        0x08
#define    SPI_CLK_MASK        0xffff
#define    SPI_DLEN    0x0c
#define    SPI_DLEN_MASK        0xffff
#define    SPI_LTOH    0x10
#define    SPI_LTOH_MASK        0xf
#define    SPI_DC        0x14
#define    SPI_DC_RPANIC_SHIFT    24
#define    SPI_DC_RPANIC_MASK    (0xff << SPI_DC_RPANIC_SHIFT)
#define    SPI_DC_RDREQ_SHIFT    16
#define    SPI_DC_RDREQ_MASK    (0xff << SPI_DC_RDREQ_SHIFT)
#define    SPI_DC_TPANIC_SHIFT    8
#define    SPI_DC_TPANIC_MASK    (0xff << SPI_DC_TPANIC_SHIFT)
#define    SPI_DC_TDREQ_SHIFT    0
#define    SPI_DC_TDREQ_MASK    0xff

int rt_hw_spi_init(void);

#endif