//------------------------------------------------------------------------------
// 프로젝트 : ETRI I2C AGENT
// 파 일 : i2c_api.h
// 설 명 : I2C DEVICE DRIVE API INCLUDE
//
// 작 성 : 유영창 frog@falinux.com
//------------------------------------------------------------------------------

#ifndef _I2C_API_LIB_H_
#define _I2C_API_LIB_H_

// #include <linux/i2c.h>

#define I2C_RETRIES	0x0701	/* number of times a device address      */
				/* should be polled when not            */
                                /* acknowledging 			*/
#define I2C_TIMEOUT	0x0702	/* set timeout - call with int 		*/


/* this is for i2c-dev.c	*/
#define I2C_SLAVE	0x0703	/* Change slave address			*/
				/* Attn.: Slave address is 7 or 10 bits */
#define I2C_SLAVE_FORCE	0x0706	/* Change slave address			*/
				/* Attn.: Slave address is 7 or 10 bits */
				/* This changes the address, even if it */
				/* is already taken!			*/
#define I2C_TENBIT	0x0704	/* 0 for 7 bit addrs, != 0 for 10 bit	*/

#define I2C_FUNCS	0x0705	/* Get the adapter functionality */
#define I2C_RDWR	0x0707	/* Combined R/W transfer (one stop only)*/
#define I2C_PEC		0x0708	/* != 0 for SMBus PEC                   */

#define I2C_SMBUS	0x0720	/* SMBus-level access */

/* ... algo-bit.c recognizes */
#define I2C_UDELAY	0x0705	/* set delay in microsecs between each	*/
				/* written byte (except address)	*/
#define I2C_MDELAY	0x0706	/* millisec delay between written bytes */

#define __u32       unsigned long



#define I2C_NO_ERROR             		    0000 // 에러가 없다.
#define I2C_UNKONW_COMMAND       		    7001 // 알수 없는 프로토콜 명령이다.
#define I2C_NOT_FIND_MAJOR	                7002 // I2C 디바이스 드라이버 주번호 획득 실패
#define I2C_NOT_FIND_BUS   		            7003 // I2C 버스를 발견할수 없다.
#define I2C_NOT_FIND_DEVICE  		        7004 // I2C 디바이스를 발견할수 없다.
#define I2C_READ_DEVICE             		7005 // 읽기 실패
#define I2C_WRITE_DEVICE            		7006 // 쓰기 실패


typedef struct 
{
    int            fd;
    char           node_fname[128];
} i2c_bus_t;

struct i2c_rdwr_ioctl_data 
{
        struct i2c_msg *msgs;    /* pointers to i2c_msgs */
        __u32 nmsgs;                    /* number of i2c_msgs */
};

typedef struct 
{
    int           bus;
    unsigned int  addr;
    int           size;
    unsigned char data[512];
} __attribute__ ((packed)) access_data_t;


extern int  i2c_init               ( void );
extern int  i2c_get_bus_count      ( void );
extern int  i2c_read_data( access_data_t* access_data );
extern int  i2c_write_data( access_data_t* access_data );

#endif  // _I2C_API_LIB_H_