i2c.h

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#ifdef  __cplusplus
extern "C" {
#endif

#include <sys/types.h>
#include <linux/i2c.h>
#include <linux/i2c-dev.h>

typedef struct i2c_device
{
    int bus; 
    unsigned short addr; 
    unsigned char tenbit; 
    unsigned char delay; 
    unsigned short flags; 
    unsigned int page_bytes; 
    unsigned int iaddr_bytes; 
} I2CDevice;

/* Open i2c bus, return i2c bus fd */
int i2c_open(const char *bus_name);

/* Close i2c bus */
void i2c_close(int bus);

/* Initialize I2CDevice with default value */
void i2c_init_device(I2CDevice *device);

/* Get i2c device description */
char* i2c_get_device_desc(const I2CDevice *device, char *buf, size_t size);

/* Select i2c device on i2c bus */
int i2c_select(int bus, unsigned long dev_addr, unsigned long tenbit);

/* I2C internal(word) address convert */
void i2c_iaddr_convert(unsigned int int_addr, unsigned int iaddr_bytes, unsigned char *addr);

/* I2C file I/O read, write */
ssize_t i2c_read(const I2CDevice *device, unsigned int iaddr, void *buf, size_t len);
ssize_t i2c_write(const I2CDevice *device, unsigned int iaddr, const void *buf, size_t len);

/* I2c ioctl read, write can set i2c flags */
ssize_t i2c_ioctl_read(const I2CDevice *device, unsigned int iaddr, void *buf, size_t len);
ssize_t i2c_ioctl_write(const I2CDevice *device, unsigned int iaddr, const void *buf, size_t len);

/* I2C smbus read, write */
ssize_t i2c_smbus_read(const I2CDevice *device, unsigned int iaddr, unsigned char *buf, size_t len);
ssize_t i2c_smbus_write(const I2CDevice *device, unsigned int iaddr, const unsigned char *buf, size_t len);

/* I2C read, write to update MCU (SBL)*/
ssize_t i2c_sbl_read(const I2CDevice *device, void *buf, size_t len);
ssize_t i2c_sbl_write(const I2CDevice *device, const void *buf, size_t len);

typedef ssize_t (*I2C_READ_HANDLE)(const I2CDevice *dev, unsigned int iaddr, void *buf, size_t len);
typedef ssize_t (*I2C_WRITE_HANDLE)(const I2CDevice *dev, unsigned int iaddr, const void *buf, size_t len);

#ifdef  __cplusplus
}
#endif