/* cpvI2c.h - I2C bus interface header for PPC 8xx *//* Copyright 1998-1999 Wind River Systems, Inc. *//* Copyright 1997,1998,1999 Motorola, Inc., All Rights Reserved *//*modification history--------------------01c,25mar98,map  code cleanup01b,04dec97,rhk  WRS code review cleanup.01a,17jun97,scb  written by rb, integrated by scb.*//*This file contains I2C I/O related defines and structure templates.*/#ifndef __INCcpvI2ch#define __INCcpvI2ch#ifdef __cplusplusextern "C" {#endif/* I2C I/O control/status word definitions */#define I2C_IO_C_MASK	(0xffff<<0)	/* control portion mask */#define I2C_IO_S_MASK	(0xffff<<16)	/* status portion mask */#define I2C_IO_C_RDATA	(1<<0)	/* read data operation */#define I2C_IO_C_WDATA	(1<<1)	/* write data operation */#define I2C_IO_S_ERROR	(1<<16)	/* error of some type, see remaining bits */#define I2C_IO_S_R_OV	(1<<17)	/* receiver overrun */#define I2C_IO_S_R_BSY	(1<<18)	/* receiver busy */#define I2C_IO_S_T_NAK	(1<<19)	/* transmitter no acknowledge */#define I2C_IO_S_T_UN	(1<<20)	/* transmitter underrun */#define I2C_IO_S_T_CL	(1<<21)	/* transmitter collision */#define I2C_IO_S_T_TO	(1<<22)	/* transmitter timeout */#define I2C_IO_S_R_TO	(1<<23)	/* receiver timeout */#define I2C_IO_S_X_BUF	(1<<28)	/* transfer size exceeds internal buffer size */#define I2C_IO_S_X_CNT	(1<<29)	/* transfer size does not equal the expected */#define I2C_DRV_NBDS	1#define I2C_RXBL_MAX	16	/* maximum RX buffer length */#define I2C_TXBL_MAX	16	/* maximum TX buffer length */#define I2C_CLK_SPD	90000   /* I2C bus clock speed  - 90khz */#define I2C_BUFSIZ                                                      \    ((I2C_DRV_NBDS * I2C_RXBL_MAX) + (I2C_DRV_NBDS * I2C_TXBL_MAX))#define I2C_INT_CLR	0xff	/* clear interrupt status */#define I2C_INT_DSBL	0x0	/* disable all interrupts */#define I2C_IOCTL_W     0       /* write */#define I2C_IOCTL_R     1       /* read */#define I2C_IOCTL_O     2       /* read/or/write */#define I2C_IOCTL_A     3       /* read/and/write */#define I2C_IOCTL_AO    4       /* read/and/or/write *//* typedefs *//* I2C driver descriptor rings structure template */typedef struct i2c_drv_bd        /* I2C_DRV_BD */    {    SCC_BUF rxbd[I2C_DRV_NBDS];  /* receive */    SCC_BUF txbd[I2C_DRV_NBDS];  /* transmit */    } I2C_DRV_BD;/* i2c i/o command packet */typedef struct i2c_cmd_pkt    {    UINT csword;              /* status/control word */    UINT devAdrs;             /* device address */    UINT dataAdrs;            /* data transfer address */    UINT dataSize;            /* data transfer size */    UINT dataSizeActual;      /* data transfer size (actual) */    } I2C_CMD_PKT;#ifdef __cplusplus}#endif#endif /* __INCcpvI2ch */