ixdp2400i2c.h

ixp2400 bsp for vxworks

/*ixdp2400I2c.h */

/*
modification history
--------------------
rev, 5apr02, vgd - creation
*/

#ifndef I2C_H
#define I2C_H

#ifdef __cplusplus
extern "C" {
#endif

#define LOW 0
#define HIGH 1

/*write this to POSR to drive the clock pin (GPIO pin 7)High and POCR for LOW*/
#define CLOCK	0x80

/*write this to POSR to drive the data pin (gpio pin 6)High and POCR for LOW*/ 
#define DATA	0x40 

/*This GPIO bit 2 has to be configured as output and 
 *drive a high to cause a pull up on the SDA line.
 */
#define I2C_INIT_BIT 0x04 

/*delayUSec() is defined in ixdp2400.c*/
extern  void delayUSec(unsigned int n);
#define I2C_DELAY(n)                delayUSec(n);
#define CLOCK_LOW_TIME	            3 /*us*/ 
#define CLOCK_HIGH_TIME	            3 /*us*/
#define START_CONDITION_HOLD_TIME   3 /*us*/
#define STOP_CONDITION_HOLD_TIME    3 /*us*/


#define I2C_ERROR  	1
#define I2C_NOERR	0

#define I2C_READ 0x01
#define I2C_WRITE 0x00


#define SLAVE_ADDR_0 0xa0 /*SDRAM SPD*/
#define SLAVE_ADDR_1 0xa2 /*KI config EEPROM*/
#define SLAVE_ADDR_2 0xa4 /*media i/f cfg PROM*/
#define SLAVE_ADDR_3 0xa6 /*sw i/f cfg prom*/
#define SLAVE_ADDR_4 0xa8 /*tcam cfg prom*/
#define SLAVE_ADDR_5 0xaa /*ADUC812*/

/*slave address = DEV_TYPE | DEV_ADDR | MODE.
 *Device type is fixed to 1010 i.e., 0xa. 
 *___________________________________
 *1 | 0 | 1 | 0 | A2 | A1 | A0| R/W|
 *-----------------------------------
 *
 *The LSB is r/W bit. if it is 1 the slave is in read mode and 
 *if it is 0 the slave is in write mode.
 */

#define I2C_BUFSIZE	256

/*config data structure*/
struct EEPROM_CONTENT {
	unsigned char	prom_fmt;
    unsigned char	dev_id;
	unsigned char	man_id[12];
	unsigned char	part_rev [2];
	
	unsigned char	part_num[10];
	unsigned char	serial_num[10];
	unsigned char	model_id[12];

	unsigned char	rsvd1[8];
	unsigned char	passwd[8];
	
	unsigned char	test_status;
	unsigned char	date[8];
	unsigned char	chksum[4];
	unsigned char	rsvd2[3];
	
	unsigned int	M_uart_baud;
	unsigned char	M_ether_mac_addr[6];
	unsigned int	S_uart_baud;
	unsigned char	S_ether_mac_addr[6];
	unsigned char	rsvd3[12];
};

struct board_config
{
	struct EEPROM_CONTENT config_data;
	int sdram_size;
	int qdr_channel_size[MAX_QDR_CHANNEL];
	int flash_size;
	int config_valid;
};

#define CONFIG_DATA_SIZE 112

void i2c_read(unsigned char slave, unsigned char word_address, 
											unsigned char *x);
void i2c_write(unsigned char slave, unsigned char addr, 
										  unsigned char data);
void i2c_page_write(unsigned char slave, unsigned char addr, 
                   unsigned char * data, unsigned char count);
void i2c_seq_read(unsigned char slave, unsigned char addr, 
                    unsigned char * ptr, unsigned char count);
void i2c_clk_cycles(int i);
void i2c_init(void);

#ifdef __cplusplus
}
#endif

#endif