| 1 | /*
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| 2 | * Copyright (C) 1998 Itai Nahshon, Michael Schimek
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| 3 | */
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| 4 |
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| 5 |
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| 6 | #ifndef _XF86I2C_H
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| 7 | #define _XF86I2C_H
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| 8 |
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| 9 | #include "regionstr.h"
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| 10 |
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| 11 | typedef unsigned char I2CByte;
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| 12 | typedef unsigned short I2CSlaveAddr;
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| 13 |
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| 14 | typedef struct _I2CBusRec *I2CBusPtr;
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| 15 | typedef struct _I2CDevRec *I2CDevPtr;
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| 16 |
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| 17 | /* I2C masters have to register themselves */
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| 18 |
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| 19 | typedef struct _I2CBusRec {
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| 20 | char * BusName;
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| 21 | int scrnIndex;
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| 22 |
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| 23 | void (*I2CUDelay) (I2CBusPtr b, int usec);
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| 24 |
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| 25 | void (*I2CPutBits)(I2CBusPtr b, int scl, int sda);
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| 26 | void (*I2CGetBits)(I2CBusPtr b, int *scl, int *sda);
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| 27 |
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| 28 | /* Look at the generic routines to see how these functions should behave. */
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| 29 |
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| 30 | Bool (*I2CStart) (I2CBusPtr b, int timeout);
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| 31 | Bool (*I2CAddress)(I2CDevPtr d, I2CSlaveAddr);
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| 32 | void (*I2CStop) (I2CDevPtr d);
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| 33 | Bool (*I2CPutByte)(I2CDevPtr d, I2CByte data);
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| 34 | Bool (*I2CGetByte)(I2CDevPtr d, I2CByte *data, Bool);
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| 35 |
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| 36 | DevUnion DriverPrivate;
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| 37 |
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| 38 | int HoldTime; /* 1 / bus clock frequency, 5 or 2 usec */
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| 39 |
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| 40 | int BitTimeout; /* usec */
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| 41 | int ByteTimeout; /* usec */
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| 42 | int AcknTimeout; /* usec */
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| 43 | int StartTimeout; /* usec */
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| 44 | int RiseFallTime; /* usec */
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| 45 |
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| 46 | I2CDevPtr FirstDev;
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| 47 | I2CBusPtr NextBus;
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| 48 | Bool (*I2CWriteRead)(I2CDevPtr d, I2CByte *WriteBuffer, int nWrite,
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| 49 | I2CByte *ReadBuffer, int nRead);
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| 50 | } I2CBusRec;
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| 51 |
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| 52 | I2CBusPtr xf86CreateI2CBusRec(void);
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| 53 | void xf86DestroyI2CBusRec(I2CBusPtr pI2CBus, Bool unalloc, Bool devs_too);
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| 54 | Bool xf86I2CBusInit(I2CBusPtr pI2CBus);
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| 55 | I2CBusPtr xf86I2CFindBus(int scrnIndex, char *name);
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| 56 | int xf86I2CGetScreenBuses(int scrnIndex, I2CBusPtr **pppI2CBus);
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| 57 |
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| 58 |
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| 59 | /* I2C slave devices */
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| 60 |
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| 61 | typedef struct _I2CDevRec {
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| 62 | char * DevName;
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| 63 |
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| 64 | int BitTimeout; /* usec */
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| 65 | int ByteTimeout; /* usec */
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| 66 | int AcknTimeout; /* usec */
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| 67 | int StartTimeout; /* usec */
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| 68 |
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| 69 | I2CSlaveAddr SlaveAddr;
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| 70 | I2CBusPtr pI2CBus;
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| 71 | I2CDevPtr NextDev;
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| 72 | DevUnion DriverPrivate;
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| 73 | } I2CDevRec;
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| 74 |
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| 75 | I2CDevPtr xf86CreateI2CDevRec(void);
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| 76 | void xf86DestroyI2CDevRec(I2CDevPtr pI2CDev, Bool unalloc);
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| 77 | Bool xf86I2CDevInit(I2CDevPtr pI2CDev);
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| 78 | I2CDevPtr xf86I2CFindDev(I2CBusPtr, I2CSlaveAddr);
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| 79 |
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| 80 | /* See descriptions of these functions in xf86i2c.c */
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| 81 |
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| 82 | Bool xf86I2CProbeAddress(I2CBusPtr pI2CBus, I2CSlaveAddr);
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| 83 | Bool xf86I2CWriteRead(I2CDevPtr d, I2CByte *WriteBuffer, int nWrite,
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| 84 | I2CByte *ReadBuffer, int nRead);
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| 85 | #define xf86I2CRead(d, rb, nr) xf86I2CWriteRead(d, NULL, 0, rb, nr)
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| 86 | Bool xf86I2CReadStatus(I2CDevPtr d, I2CByte *pbyte);
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| 87 | Bool xf86I2CReadByte(I2CDevPtr d, I2CByte subaddr, I2CByte *pbyte);
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| 88 | Bool xf86I2CReadBytes(I2CDevPtr d, I2CByte subaddr, I2CByte *pbyte, int n);
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| 89 | Bool xf86I2CReadWord(I2CDevPtr d, I2CByte subaddr, unsigned short *pword);
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| 90 | #define xf86I2CWrite(d, wb, nw) xf86I2CWriteRead(d, wb, nw, NULL, 0)
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| 91 | Bool xf86I2CWriteByte(I2CDevPtr d, I2CByte subaddr, I2CByte byte);
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| 92 | Bool xf86I2CWriteBytes(I2CDevPtr d, I2CByte subaddr, I2CByte *WriteBuffer, int nWrite);
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| 93 | Bool xf86I2CWriteWord(I2CDevPtr d, I2CByte subaddr, unsigned short word);
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| 94 | Bool xf86I2CWriteVec(I2CDevPtr d, I2CByte *vec, int nValues);
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| 95 |
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| 96 | #endif /*_XF86I2C_H */
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