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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1029 | serge | 1 | /* |
| 2 | * Copyright (C) 1998 Itai Nahshon, Michael Schimek |
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| 3 | */ |
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| 4 | |||
| 5 | /* $XFree86: xc/programs/Xserver/hw/xfree86/i2c/xf86i2c.h,v 1.10 2003/07/16 01:38:47 dawes Exp $ */ |
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| 6 | #ifndef _XF86I2C_H |
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| 7 | #define _XF86I2C_H |
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| 8 | |||
| 9 | //#include "regionstr.h" |
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| 10 | |||
| 11 | typedef unsigned char I2CByte; |
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| 12 | typedef unsigned short I2CSlaveAddr; |
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| 13 | |||
| 14 | typedef struct _I2CBusRec *I2CBusPtr; |
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| 15 | typedef struct _I2CDevRec *I2CDevPtr; |
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| 16 | |||
| 17 | /* I2C masters have to register themselves */ |
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| 18 | |||
| 19 | typedef union _DevUnion { |
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| 20 | pointer ptr; |
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| 21 | long val; |
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| 22 | unsigned long uval; |
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| 23 | } DevUnion; |
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| 24 | |||
| 25 | |||
| 26 | |||
| 27 | typedef struct _I2CBusRec { |
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| 28 | char * BusName; |
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| 29 | int scrnIndex; |
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| 30 | |||
| 31 | void (*I2CUDelay) (I2CBusPtr b, int usec); |
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| 32 | |||
| 33 | void (*I2CPutBits)(I2CBusPtr b, int scl, int sda); |
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| 34 | void (*I2CGetBits)(I2CBusPtr b, int *scl, int *sda); |
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| 35 | |||
| 36 | /* Look at the generic routines to see how these functions should behave. */ |
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| 37 | |||
| 38 | Bool (*I2CStart) (I2CBusPtr b, int timeout); |
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| 39 | Bool (*I2CAddress)(I2CDevPtr d, I2CSlaveAddr); |
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| 40 | void (*I2CStop) (I2CDevPtr d); |
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| 41 | Bool (*I2CPutByte)(I2CDevPtr d, I2CByte data); |
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| 42 | Bool (*I2CGetByte)(I2CDevPtr d, I2CByte *data, Bool); |
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| 43 | |||
| 44 | DevUnion DriverPrivate; |
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| 45 | |||
| 46 | int HoldTime; /* 1 / bus clock frequency, 5 or 2 usec */ |
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| 47 | |||
| 48 | int BitTimeout; /* usec */ |
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| 49 | int ByteTimeout; /* usec */ |
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| 50 | int AcknTimeout; /* usec */ |
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| 51 | int StartTimeout; /* usec */ |
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| 52 | int RiseFallTime; /* usec */ |
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| 53 | |||
| 54 | I2CDevPtr FirstDev; |
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| 55 | I2CBusPtr NextBus; |
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| 56 | Bool (*I2CWriteRead)(I2CDevPtr d, I2CByte *WriteBuffer, int nWrite, |
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| 57 | I2CByte *ReadBuffer, int nRead); |
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| 58 | } I2CBusRec; |
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| 59 | |||
| 60 | I2CBusPtr xf86CreateI2CBusRec(void); |
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| 61 | void xf86DestroyI2CBusRec(I2CBusPtr pI2CBus, Bool unalloc, Bool devs_too); |
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| 62 | Bool xf86I2CBusInit(I2CBusPtr pI2CBus); |
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| 63 | I2CBusPtr xf86I2CFindBus(RHDPtr rhdPtr, char *name); |
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| 64 | int xf86I2CGetScreenBuses(RHDPtr rhdPtr, I2CBusPtr **pppI2CBus); |
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| 65 | |||
| 66 | |||
| 67 | /* I2C slave devices */ |
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| 68 | |||
| 69 | typedef struct _I2CDevRec { |
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| 70 | char * DevName; |
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| 71 | |||
| 72 | int BitTimeout; /* usec */ |
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| 73 | int ByteTimeout; /* usec */ |
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| 74 | int AcknTimeout; /* usec */ |
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| 75 | int StartTimeout; /* usec */ |
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| 76 | |||
| 77 | I2CSlaveAddr SlaveAddr; |
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| 78 | I2CBusPtr pI2CBus; |
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| 79 | I2CDevPtr NextDev; |
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| 80 | DevUnion DriverPrivate; |
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| 81 | } I2CDevRec; |
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| 82 | |||
| 83 | I2CDevPtr xf86CreateI2CDevRec(void); |
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| 84 | void xf86DestroyI2CDevRec(I2CDevPtr pI2CDev, Bool unalloc); |
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| 85 | Bool xf86I2CDevInit(I2CDevPtr pI2CDev); |
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| 86 | I2CDevPtr xf86I2CFindDev(I2CBusPtr, I2CSlaveAddr); |
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| 87 | |||
| 88 | /* See descriptions of these functions in xf86i2c.c */ |
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| 89 | |||
| 90 | Bool xf86I2CProbeAddress(I2CBusPtr pI2CBus, I2CSlaveAddr); |
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| 91 | Bool xf86I2CWriteRead(I2CDevPtr d, I2CByte *WriteBuffer, int nWrite, |
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| 92 | I2CByte *ReadBuffer, int nRead); |
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| 93 | #define xf86I2CRead(d, rb, nr) xf86I2CWriteRead(d, NULL, 0, rb, nr) |
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| 94 | Bool xf86I2CReadStatus(I2CDevPtr d, I2CByte *pbyte); |
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| 95 | Bool xf86I2CReadByte(I2CDevPtr d, I2CByte subaddr, I2CByte *pbyte); |
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| 96 | Bool xf86I2CReadBytes(I2CDevPtr d, I2CByte subaddr, I2CByte *pbyte, int n); |
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| 97 | Bool xf86I2CReadWord(I2CDevPtr d, I2CByte subaddr, unsigned short *pword); |
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| 98 | #define xf86I2CWrite(d, wb, nw) xf86I2CWriteRead(d, wb, nw, NULL, 0) |
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| 99 | Bool xf86I2CWriteByte(I2CDevPtr d, I2CByte subaddr, I2CByte byte); |
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| 100 | Bool xf86I2CWriteBytes(I2CDevPtr d, I2CByte subaddr, I2CByte *WriteBuffer, int nWrite); |
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| 101 | Bool xf86I2CWriteWord(I2CDevPtr d, I2CByte subaddr, unsigned short word); |
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| 102 | Bool xf86I2CWriteVec(I2CDevPtr d, I2CByte *vec, int nValues); |
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| 103 | |||
| 104 | #endif /*_XF86I2C_H */ |