xf86i2c.h (4230B)
1 /* 2 * Copyright (C) 1998 Itai Nahshon, Michael Schimek 3 */ 4 5 #ifndef _XF86I2C_H 6 #define _XF86I2C_H 7 8 #include "regionstr.h" 9 #include "xf86.h" 10 11 typedef unsigned char I2CByte; 12 typedef unsigned short I2CSlaveAddr; 13 14 typedef struct _I2CBusRec *I2CBusPtr; 15 typedef struct _I2CDevRec *I2CDevPtr; 16 17 /* I2C masters have to register themselves */ 18 19 typedef struct _I2CBusRec { 20 char *BusName; 21 int scrnIndex; 22 ScrnInfoPtr pScrn; 23 24 void (*I2CUDelay) (I2CBusPtr b, int usec); 25 26 void (*I2CPutBits) (I2CBusPtr b, int scl, int sda); 27 void (*I2CGetBits) (I2CBusPtr b, int *scl, int *sda); 28 29 /* Look at the generic routines to see how these functions should behave. */ 30 31 Bool (*I2CStart) (I2CBusPtr b, int timeout); 32 Bool (*I2CAddress) (I2CDevPtr d, I2CSlaveAddr); 33 void (*I2CStop) (I2CDevPtr d); 34 Bool (*I2CPutByte) (I2CDevPtr d, I2CByte data); 35 Bool (*I2CGetByte) (I2CDevPtr d, I2CByte * data, Bool); 36 37 DevUnion DriverPrivate; 38 39 int HoldTime; /* 1 / bus clock frequency, 5 or 2 usec */ 40 41 int BitTimeout; /* usec */ 42 int ByteTimeout; /* usec */ 43 int AcknTimeout; /* usec */ 44 int StartTimeout; /* usec */ 45 int RiseFallTime; /* usec */ 46 47 I2CDevPtr FirstDev; 48 I2CBusPtr NextBus; 49 Bool (*I2CWriteRead) (I2CDevPtr d, I2CByte * WriteBuffer, int nWrite, 50 I2CByte * ReadBuffer, int nRead); 51 } I2CBusRec; 52 53 #define CreateI2CBusRec xf86CreateI2CBusRec 54 extern _X_EXPORT I2CBusPtr xf86CreateI2CBusRec(void); 55 56 #define DestroyI2CBusRec xf86DestroyI2CBusRec 57 extern _X_EXPORT void xf86DestroyI2CBusRec(I2CBusPtr pI2CBus, Bool unalloc, 58 Bool devs_too); 59 #define I2CBusInit xf86I2CBusInit 60 extern _X_EXPORT Bool xf86I2CBusInit(I2CBusPtr pI2CBus); 61 62 extern _X_EXPORT I2CBusPtr xf86I2CFindBus(int scrnIndex, char *name); 63 extern _X_EXPORT int xf86I2CGetScreenBuses(int scrnIndex, 64 I2CBusPtr ** pppI2CBus); 65 66 /* I2C slave devices */ 67 68 typedef struct _I2CDevRec { 69 const char *DevName; 70 71 int BitTimeout; /* usec */ 72 int ByteTimeout; /* usec */ 73 int AcknTimeout; /* usec */ 74 int StartTimeout; /* usec */ 75 76 I2CSlaveAddr SlaveAddr; 77 I2CBusPtr pI2CBus; 78 I2CDevPtr NextDev; 79 DevUnion DriverPrivate; 80 } I2CDevRec; 81 82 #define CreateI2CDevRec xf86CreateI2CDevRec 83 extern _X_EXPORT I2CDevPtr xf86CreateI2CDevRec(void); 84 extern _X_EXPORT void xf86DestroyI2CDevRec(I2CDevPtr pI2CDev, Bool unalloc); 85 86 #define I2CDevInit xf86I2CDevInit 87 extern _X_EXPORT Bool xf86I2CDevInit(I2CDevPtr pI2CDev); 88 extern _X_EXPORT I2CDevPtr xf86I2CFindDev(I2CBusPtr, I2CSlaveAddr); 89 90 /* See descriptions of these functions in xf86i2c.c */ 91 92 #define I2CProbeAddress xf86I2CProbeAddress 93 extern _X_EXPORT Bool xf86I2CProbeAddress(I2CBusPtr pI2CBus, I2CSlaveAddr); 94 95 #define I2C_WriteRead xf86I2CWriteRead 96 extern _X_EXPORT Bool xf86I2CWriteRead(I2CDevPtr d, I2CByte * WriteBuffer, 97 int nWrite, I2CByte * ReadBuffer, 98 int nRead); 99 #define xf86I2CRead(d, rb, nr) xf86I2CWriteRead(d, NULL, 0, rb, nr) 100 101 extern _X_EXPORT Bool xf86I2CReadStatus(I2CDevPtr d, I2CByte * pbyte); 102 extern _X_EXPORT Bool xf86I2CReadByte(I2CDevPtr d, I2CByte subaddr, 103 I2CByte * pbyte); 104 extern _X_EXPORT Bool xf86I2CReadBytes(I2CDevPtr d, I2CByte subaddr, 105 I2CByte * pbyte, int n); 106 extern _X_EXPORT Bool xf86I2CReadWord(I2CDevPtr d, I2CByte subaddr, 107 unsigned short *pword); 108 #define xf86I2CWrite(d, wb, nw) xf86I2CWriteRead(d, wb, nw, NULL, 0) 109 extern _X_EXPORT Bool xf86I2CWriteByte(I2CDevPtr d, I2CByte subaddr, 110 I2CByte byte); 111 extern _X_EXPORT Bool xf86I2CWriteBytes(I2CDevPtr d, I2CByte subaddr, 112 I2CByte * WriteBuffer, int nWrite); 113 extern _X_EXPORT Bool xf86I2CWriteWord(I2CDevPtr d, I2CByte subaddr, 114 unsigned short word); 115 extern _X_EXPORT Bool xf86I2CWriteVec(I2CDevPtr d, I2CByte * vec, int nValues); 116 117 #endif /*_XF86I2C_H */