spidev.h

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#ifndef __VSF_LINUX_SPI_H__
#define __VSF_LINUX_SPI_H__
 
#include <stdint.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
#define SPI_CPHA                    0x01
#define SPI_CPOL                    0x02
 
#define SPI_MODE_0                  (0 | 0)
#define SPI_MODE_1                  (0 | SPI_CPHA)
#define SPI_MODE_2                  (SPI_CPOL | 0)
#define SPI_MODE_3                  (SPI_CPOL | SPI_CPHA)
 
#define SPI_CS_HIGH                 0x04
#define SPI_LSB_FIRST               0x08
#define SPI_NO_CS                   0x40
#define SPI_READY                   0x80
 
// IOCTL
#define SPI_IOC_MAGIC               'k'
 
#define SPI_IOC_MESSAGE(__N)        _IOC(_IOC_WRITE, SPI_IOC_MAGIC, 0, __N)
 
#define SPI_IOC_RD_MODE             _IOR(SPI_IOC_MAGIC, 1, uint8_t)
#define SPI_IOC_WR_MODE             _IOW(SPI_IOC_MAGIC, 1, uint8_t)
 
#define SPI_IOC_RD_LSB_FIRST        _IOR(SPI_IOC_MAGIC, 2, uint8_t)
#define SPI_IOC_WR_LSB_FIRST        _IOW(SPI_IOC_MAGIC, 2, uint8_t)
 
#define SPI_IOC_RD_BITS_PER_WORD    _IOR(SPI_IOC_MAGIC, 3, uint8_t)
#define SPI_IOC_WR_BITS_PER_WORD    _IOW(SPI_IOC_MAGIC, 3, uint8_t)
 
#define SPI_IOC_RD_MAX_SPEED_HZ     _IOR(SPI_IOC_MAGIC, 4, uint32_t)
#define SPI_IOC_WR_MAX_SPEED_HZ     _IOW(SPI_IOC_MAGIC, 4, uint32_t)
 
#define SPI_IOC_RD_MODE32           _IOR(SPI_IOC_MAGIC, 5, uint32_t)
#define SPI_IOC_WR_MODE32           _IOW(SPI_IOC_MAGIC, 5, uint32_t)
 
struct spi_ioc_transfer {
    uintptr_t tx_buf;
    uintptr_t rx_buf;
    uint32_t len;
    uint32_t speed_hz;
    uint16_t delay_usecs;
    uint8_t bits_per_word;
    uint8_t cs_change;
};
 
#ifdef __cplusplus
}
#endif
 
#endif