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