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/*
* Copyright (C) 1998 Itai Nahshon, Michael Schimek
*/
#ifndef _XF86I2C_H
#define _XF86I2C_H
#include "regionstr.h"
typedef unsigned char I2CByte;
typedef unsigned short I2CSlaveAddr;
typedef struct _I2CBusRec *I2CBusPtr;
typedef struct _I2CDevRec *I2CDevPtr;
/* I2C masters have to register themselves */
typedef struct _I2CBusRec {
char * BusName;
int scrnIndex;
void (*I2CUDelay) (I2CBusPtr b, int usec);
void (*I2CPutBits)(I2CBusPtr b, int scl, int sda);
void (*I2CGetBits)(I2CBusPtr b, int *scl, int *sda);
/* Look at the generic routines to see how these functions should behave. */
Bool (*I2CStart) (I2CBusPtr b, int timeout);
Bool (*I2CAddress)(I2CDevPtr d, I2CSlaveAddr);
void (*I2CStop) (I2CDevPtr d);
Bool (*I2CPutByte)(I2CDevPtr d, I2CByte data);
Bool (*I2CGetByte)(I2CDevPtr d, I2CByte *data, Bool);
DevUnion DriverPrivate;
int HoldTime; /* 1 / bus clock frequency, 5 or 2 usec */
int BitTimeout; /* usec */
int ByteTimeout; /* usec */
int AcknTimeout; /* usec */
int StartTimeout; /* usec */
int RiseFallTime; /* usec */
I2CDevPtr FirstDev;
I2CBusPtr NextBus;
Bool (*I2CWriteRead)(I2CDevPtr d, I2CByte *WriteBuffer, int nWrite,
I2CByte *ReadBuffer, int nRead);
} I2CBusRec;
I2CBusPtr xf86CreateI2CBusRec(void);
void xf86DestroyI2CBusRec(I2CBusPtr pI2CBus, Bool unalloc, Bool devs_too);
Bool xf86I2CBusInit(I2CBusPtr pI2CBus);
I2CBusPtr xf86I2CFindBus(int scrnIndex, char *name);
int xf86I2CGetScreenBuses(int scrnIndex, I2CBusPtr **pppI2CBus);
/* I2C slave devices */
typedef struct _I2CDevRec {
char * DevName;
int BitTimeout; /* usec */
int ByteTimeout; /* usec */
int AcknTimeout; /* usec */
int StartTimeout; /* usec */
I2CSlaveAddr SlaveAddr;
I2CBusPtr pI2CBus;
I2CDevPtr NextDev;
DevUnion DriverPrivate;
} I2CDevRec;
I2CDevPtr xf86CreateI2CDevRec(void);
void xf86DestroyI2CDevRec(I2CDevPtr pI2CDev, Bool unalloc);
Bool xf86I2CDevInit(I2CDevPtr pI2CDev);
I2CDevPtr xf86I2CFindDev(I2CBusPtr, I2CSlaveAddr);
/* See descriptions of these functions in xf86i2c.c */
Bool xf86I2CProbeAddress(I2CBusPtr pI2CBus, I2CSlaveAddr);
Bool xf86I2CWriteRead(I2CDevPtr d, I2CByte *WriteBuffer, int nWrite,
I2CByte *ReadBuffer, int nRead);
#define xf86I2CRead(d, rb, nr) xf86I2CWriteRead(d, NULL, 0, rb, nr)
Bool xf86I2CReadStatus(I2CDevPtr d, I2CByte *pbyte);
Bool xf86I2CReadByte(I2CDevPtr d, I2CByte subaddr, I2CByte *pbyte);
Bool xf86I2CReadBytes(I2CDevPtr d, I2CByte subaddr, I2CByte *pbyte, int n);
Bool xf86I2CReadWord(I2CDevPtr d, I2CByte subaddr, unsigned short *pword);
#define xf86I2CWrite(d, wb, nw) xf86I2CWriteRead(d, wb, nw, NULL, 0)
Bool xf86I2CWriteByte(I2CDevPtr d, I2CByte subaddr, I2CByte byte);
Bool xf86I2CWriteBytes(I2CDevPtr d, I2CByte subaddr, I2CByte *WriteBuffer, int nWrite);
Bool xf86I2CWriteWord(I2CDevPtr d, I2CByte subaddr, unsigned short word);
Bool xf86I2CWriteVec(I2CDevPtr d, I2CByte *vec, int nValues);
#endif /*_XF86I2C_H */
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