rt-thread-official/bsp/dm365/drivers/spi-davinci.h

/*
 * Copyright (c) 2006-2021, RT-Thread Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author        Notes
 * 2011-01-13     weety     first version
 */

#ifndef __DAVINCI_SPI_H
#define __DAVINCI_SPI_H

typedef unsigned long  u32;
typedef unsigned short u16;
typedef unsigned char  u8;
typedef unsigned int   bool;

#define SPI_INTERN_CS   0xFF

enum {
    SPI_VERSION_1, /* For DM355/DM365/DM6467 */
    SPI_VERSION_2, /* For DA8xx */
};

/**
 * davinci_spi_config - Per-chip-select configuration for SPI slave devices
 *
 * @wdelay: amount of delay between transmissions. Measured in number of
 *      SPI module clocks.
 * @odd_parity: polarity of parity flag at the end of transmit data stream.
 *      0 - odd parity, 1 - even parity.
 * @parity_enable: enable transmission of parity at end of each transmit
 *      data stream.
 * @io_type:    type of IO transfer. Choose between polled, interrupt and DMA.
 * @timer_disable: disable chip-select timers (setup and hold)
 * @c2tdelay:   chip-select setup time. Measured in number of SPI module clocks.
 * @t2cdelay:   chip-select hold time. Measured in number of SPI module clocks.
 * @t2edelay:   transmit data finished to SPI ENAn pin inactive time. Measured
 *      in number of SPI clocks.
 * @c2edelay:   chip-select active to SPI ENAn signal active time. Measured in
 *      number of SPI clocks.
 */
struct davinci_spi_config {
    u8  wdelay;
    u8  odd_parity;
    u8  parity_enable;
#define SPI_IO_TYPE_INTR    0
#define SPI_IO_TYPE_POLL    1
#define SPI_IO_TYPE_DMA     2
    u8  io_type;
    u8  timer_disable;
    u8  c2tdelay;
    u8  t2cdelay;
    u8  t2edelay;
    u8  c2edelay;
};

extern int rt_hw_spi_init(void);

#endif  /* __DAVINCI_SPI_H */