i2c-algo-gm.h

基于GM8180,NSF2200F的I2C驱动,LINUX平台

/* ------------------------------------------------------------------------- */
/* i2c-algo-gm.h i2c driver algorithms for GM IIC adapters                   */
/* ------------------------------------------------------------------------- */
/*   Copyright (C) 1995-97 Simon G. Vogl
                   1998-99 Hans Berglund

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.                */
/* ------------------------------------------------------------------------- */

/* With some changes from Ky鰏ti M鋖kki <[e-mail]> and even
   Frodo Looijaard <[e-mail]> */

/* Modifications by MontaVista Software, 2001
   Changes made to support the ITE IIC peripheral */

/* Modify By Ken.Hsieh */

#ifndef I2C_ALGO_GM_H
#define I2C_ALGO_GM_H 1

#include <linux/i2c.h>
#include <asm/arch/platform/spec.h>

/* Example of a sequential read request:
	struct i2c_iic_msg s_msg; 

	s_msg.addr=device_address;
	s_msg.len=length;
	s_msg.buf=buffer;
	s_msg.waddr=word_address;
	ioctl(file,I2C_SREAD, &s_msg);
 */
#define I2C_SREAD	0x780	/* SREAD ioctl command */

struct i2c_iic_msg {
	__u16 addr;	/* device address */
	__u16 waddr;	/* word address */
	short len;	/* msg length */
	char *buf;	/* pointer to msg data */
};

struct i2c_GM_msg {
	unsigned char addr;	/* device address */
	unsigned char waddr;	/* word address */
	short len;	/* msg length */
	char *buf;	/* pointer to msg data */
	int clockdiv;	/* for clock div */
        int multiread_once ; /* decide to read multibyte once. if 0: read one byte by one; if 1: read multibyte once*/
};

struct GMi2c_info {
    	struct i2c_adapter	    adap;
	void *data;	/* private data for the adapter			*/
			/* some data fields that are used by all types	*/
			/* these data fields are readonly to the public	*/
			/* and can be set via the i2c_ioctl call	*/
	unsigned int flags;/* flags specifying div. data		*/
	int client_count;    
};
 
struct GMi2c_i2c_client {
	unsigned int flags;		/* div., see below		*/
	unsigned short addr;		/* chip address - NOTE: 7bit 	*/
					/* addresses are stored in the	*/
					/* _LOWER_ 7 bits		*/
	struct GMi2c_info *adapter;     /* the adapter we sit on	*/
	struct i2c_driver *driver;	/* and our access routines	*/
	int usage_count;		/* How many accesses currently  */
					/* to the client		*/
	struct device dev;		/* the device structure		*/
	struct list_head list;
	char name[I2C_NAME_SIZE];
	struct completion released;    
};
    
struct i2c_algo_iic_data {
	void *data;		/* private data for lolevel routines	*/
	void (*setiic) (void *data, int ctl, int val);
	int  (*getiic) (void *data, int ctl);
	int  (*getown) (void *data);
	int  (*getclock) (void *data);
	void (*waitforpin) (void);     

	/* local settings */
	int udelay;
	int mdelay;
	int timeout;
};

int i2c_iic_add_bus(struct i2c_adapter *);
int i2c_iic_del_bus(struct i2c_adapter *);
int i2c_xfer(struct i2c_adapter *,struct i2c_msg msgs[],int num);

/* EEPROM Configuration */
#define CONFIG_START_ADDR           0x0

#define I2C_ADDR                    I2C_FTI2C010_VA_BASE
#define I2C_ALIEN                   0x2000  /* Arbitration lose */
#define I2C_SAMIEN                  0x1000  /* slave address match */
#define I2C_STOPIEN                 0x800   /* stop condition */
#define I2C_BERRIEN                 0x400   /* non ACK response */
#define I2C_DRIEN                   0x200   /* data receive */
#define I2C_DTIEN                   0x100   /* data transmit */
#define I2C_TBEN                    0x80    /* transfer byte enable */
#define I2C_ACKNAK                  0x40    /* ack sent */
#define I2C_STOP                    0x20    /* stop */
#define I2C_START                   0x10    /* start */
#define I2C_GCEN                    0x8     /* general call */
#define I2C_SCLEN                   0x4     /* enable clock */
#define I2C_I2CEN                   0x2     /* enable I2C */
#define I2C_I2CRST                  0x1     /* reset I2C */
#define I2C_ENABLE                  (I2C_ALIEN|I2C_SAMIEN|I2C_STOPIEN|I2C_BERRIEN|I2C_DRIEN|I2C_DTIEN|I2C_SCLEN|I2C_I2CEN)

//controller
#define EEPROM_ID_WRITE     0xa8
#define EEPROM_ID_READ	    0xa9

#endif /* I2C_ALGO_GM_H */