2005-04-17 02:20:36 +04:00
/*
2006-10-04 01:01:26 +04:00
* drivers / i2c / busses / i2c - ibm_iic . h
2005-04-17 02:20:36 +04:00
*
* Support for the IIC peripheral on IBM PPC 4 xx
*
* Copyright ( c ) 2003 Zultys Technologies .
* Eugene Surovegin < eugene . surovegin @ zultys . com > or < ebs @ ebshome . net >
*
* Based on original work by
* Ian DaSilva < idasilva @ mvista . com >
* Armin Kuster < akuster @ mvista . com >
* Matt Porter < mporter @ mvista . com >
*
* Copyright 2000 - 2003 MontaVista Software Inc .
*
* 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 .
*
*/
# ifndef __I2C_IBM_IIC_H_
# define __I2C_IBM_IIC_H_
# include <linux/i2c.h>
struct iic_regs {
u16 mdbuf ;
u16 sbbuf ;
u8 lmadr ;
u8 hmadr ;
u8 cntl ;
u8 mdcntl ;
u8 sts ;
u8 extsts ;
u8 lsadr ;
u8 hsadr ;
u8 clkdiv ;
u8 intmsk ;
u8 xfrcnt ;
u8 xtcntlss ;
u8 directcntl ;
} ;
struct ibm_iic_private {
struct i2c_adapter adap ;
volatile struct iic_regs __iomem * vaddr ;
wait_queue_head_t wq ;
int idx ;
int irq ;
int fast_mode ;
u8 clckdiv ;
} ;
/* IICx_CNTL register */
# define CNTL_HMT 0x80
# define CNTL_AMD 0x40
# define CNTL_TCT_MASK 0x30
# define CNTL_TCT_SHIFT 4
# define CNTL_RPST 0x08
# define CNTL_CHT 0x04
# define CNTL_RW 0x02
# define CNTL_PT 0x01
/* IICx_MDCNTL register */
# define MDCNTL_FSDB 0x80
# define MDCNTL_FMDB 0x40
# define MDCNTL_EGC 0x20
# define MDCNTL_FSM 0x10
# define MDCNTL_ESM 0x08
# define MDCNTL_EINT 0x04
# define MDCNTL_EUBS 0x02
# define MDCNTL_HSCL 0x01
/* IICx_STS register */
# define STS_SSS 0x80
# define STS_SLPR 0x40
# define STS_MDBS 0x20
# define STS_MDBF 0x10
# define STS_SCMP 0x08
# define STS_ERR 0x04
# define STS_IRQA 0x02
# define STS_PT 0x01
/* IICx_EXTSTS register */
# define EXTSTS_IRQP 0x80
# define EXTSTS_BCS_MASK 0x70
# define EXTSTS_BCS_FREE 0x40
# define EXTSTS_IRQD 0x08
# define EXTSTS_LA 0x04
# define EXTSTS_ICT 0x02
# define EXTSTS_XFRA 0x01
/* IICx_INTRMSK register */
# define INTRMSK_EIRC 0x80
# define INTRMSK_EIRS 0x40
# define INTRMSK_EIWC 0x20
# define INTRMSK_EIWS 0x10
# define INTRMSK_EIHE 0x08
# define INTRMSK_EIIC 0x04
# define INTRMSK_EITA 0x02
# define INTRMSK_EIMTC 0x01
/* IICx_XFRCNT register */
# define XFRCNT_MTC_MASK 0x07
/* IICx_XTCNTLSS register */
# define XTCNTLSS_SRC 0x80
# define XTCNTLSS_SRS 0x40
# define XTCNTLSS_SWC 0x20
# define XTCNTLSS_SWS 0x10
# define XTCNTLSS_SRST 0x01
/* IICx_DIRECTCNTL register */
# define DIRCNTL_SDAC 0x08
# define DIRCNTL_SCC 0x04
# define DIRCNTL_MSDA 0x02
# define DIRCNTL_MSC 0x01
/* Check if we really control the I2C bus and bus is free */
# define DIRCTNL_FREE(v) (((v) & 0x0f) == 0x0f)
# endif /* __I2C_IBM_IIC_H_ */
