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//==========================================================================;
//
// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
// KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR
// PURPOSE.
//
// Copyright (c) 1996 - 1997 Microsoft Corporation. All Rights Reserved.
//
//@@BEGIN_DDKSPLIT
//
// WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING
//
// The files
// \wdm10\ddk\inc\i2cgpio.h
// \dev\ddk\inc\i2cgpio.h
// Are the same.
//
// When changing either file, be sure to update the other file in the other
// directory. This has been done to ensure that the DirectX DDK can pull
// I2CGPIO.H into its DDK from \dev\ddk\inc, and not have to enlist in the
// \wdm10 ddk.
//
//@@END_DDKSPLIT
//==========================================================================;
#if 0
To access the IO functionality in a WDM driver or the VDD, WDM driver sends the following IRP to its parent.
MajorFunction = IRP_MJ_PNP;MinorFunction = IRP_MN_QUERY_INTERFACE;
Guid = DEFINE_GUID( GUID_GPIO_INTERFACE, 0x02295e87L, 0xbb3f, 0x11d0, 0x80, 0xce, 0x0, 0x20, 0xaf, 0xf7, 0x49, 0x1e);
The QUERY_INTERFACE Irp will return an interface (set of function pointers)of the type xxxxINTERFACE, defined below. This is essentially a table offunction pointers.
#endif
#ifndef __I2CGPIO_H__
#define __I2CGPIO_H__
#ifdef __cplusplus
extern "C" {#endif // __cplusplus
// Guids
//
// DEFINE_GUID requires that you include wdm.h before this file.
// #define INITGUID to actually initialize the guid in memory.
//
DEFINE_GUID( GUID_I2C_INTERFACE, 0x02295e86L, 0xbb3f, 0x11d0, 0x80, 0xce, 0x0, 0x20, 0xaf, 0xf7, 0x49, 0x1e);DEFINE_GUID( GUID_GPIO_INTERFACE,0x02295e87L, 0xbb3f, 0x11d0, 0x80, 0xce, 0x0, 0x20, 0xaf, 0xf7, 0x49, 0x1e);DEFINE_GUID( GUID_COPYPROTECTION_INTERFACE, 0x02295e88L, 0xbb3f, 0x11d0, 0x80, 0xce, 0x0, 0x20, 0xaf, 0xf7, 0x49, 0x1e);
//==========================================================================;
// used below if neccessary
#ifndef BYTE
#define BYTE UCHAR
#endif
#ifndef DWORD
#define DWORD ULONG
#endif
//==========================================================================;
//
// I2C section
//
// I2C Commands
#define I2C_COMMAND_NULL 0X0000
#define I2C_COMMAND_READ 0X0001
#define I2C_COMMAND_WRITE 0X0002
#define I2C_COMMAND_STATUS 0X0004
#define I2C_COMMAND_RESET 0X0008
// The following flags are provided on a READ or WRITE command
#define I2C_FLAGS_START 0X0001 // START + addx
#define I2C_FLAGS_STOP 0X0002 // STOP
#define I2C_FLAGS_DATACHAINING 0X0004 // STOP, START + addx
#define I2C_FLAGS_ACK 0X0010 // ACKNOWLEDGE (normally set)
// The following status flags are returned on completion of the operation
#define I2C_STATUS_NOERROR 0X0000
#define I2C_STATUS_BUSY 0X0001
#define I2C_STATUS_ERROR 0X0002
typedef struct _I2CControl { ULONG Command; // I2C_COMMAND_*
DWORD dwCookie; // Context identifier returned on Open
BYTE Data; // Data to write, or returned byte
BYTE Reserved[3]; // Filler
ULONG Flags; // I2C_FLAGS_*
ULONG Status; // I2C_STATUS_*
ULONG ClockRate; // Bus clockrate in Hz.
} I2CControl, *PI2CControl;
// this is the Interface definition for I2C
//
typedef NTSTATUS (STDMETHODCALLTYPE *I2COPEN)(PDEVICE_OBJECT, ULONG, PI2CControl);typedef NTSTATUS (STDMETHODCALLTYPE *I2CACCESS)(PDEVICE_OBJECT, PI2CControl);
typedef struct { INTERFACE _vddInterface; I2COPEN i2cOpen; I2CACCESS i2cAccess;} I2CINTERFACE;
//==========================================================================;
//
// GPIO section
//
// GPIO Commands
#define GPIO_COMMAND_QUERY 0X0001 // get #pins and nBufferSize
#define GPIO_COMMAND_OPEN 0X0001 // old open
#define GPIO_COMMAND_OPEN_PINS 0X0002 // get dwCookie
#define GPIO_COMMAND_CLOSE_PINS 0X0004 // invalidate cookie
#define GPIO_COMMAND_READ_BUFFER 0X0008
#define GPIO_COMMAND_WRITE_BUFFER 0X0010
// The following flags are provided on a READ_BUFFER or WRITE_BUFFER command
// lpPins bits set MUST have contiguous bits set for a read/write command.
//
// On a READ, if the number of pins set in the bitmask does not fill a
// byte/word/dword, then zeros are returned for those positions.
// on a WRITE, if the number of pins set in the bitmask does not fill a
// byte/word/dword, a read/modify/write is done on the port/mmio position
// that represents those bits.
#define GPIO_FLAGS_BYTE 0x0001 // do byte read/write
#define GPIO_FLAGS_WORD 0x0002 // do word read/write
#define GPIO_FLAGS_DWORD 0x0004 // do dword read/write
// The following status flags are returned on completion of the operation
#define GPIO_STATUS_NOERROR 0X0000
#define GPIO_STATUS_BUSY 0X0001
#define GPIO_STATUS_ERROR 0X0002
#define GPIO_STATUS_NO_ASYNCH 0X0004 // gpio provider does not do asynch xfer
typedef struct _GPIOControl { ULONG Command; // GPIO_COMMAND_*
ULONG Flags; // GPIO_FLAGS_*
DWORD dwCookie; // Context identifier returned on Open
ULONG Status; // GPIO_STATUS_*
ULONG nBytes; // # of bytes to send or recieved
ULONG nBufferSize; // max size of buffer
ULONG nPins; // number of GPIO pins returned by Open
UCHAR *Pins; // pointer to bitmask of pins to read/write
UCHAR *Buffer; // pointer to GPIO data to send/recieve
void (*AsynchCompleteCallback)(UCHAR *Buffer); // NULL if synchronous xfer, valid ptr if asynch.
GUID PrivateInterfaceType; void (*PrivateInterface)(); } GPIOControl, *PGPIOControl;
// This is the GPIO interface
//
typedef NTSTATUS (STDMETHODCALLTYPE *GPIOOPEN)(PDEVICE_OBJECT, ULONG, PGPIOControl);typedef NTSTATUS (STDMETHODCALLTYPE *GPIOACCESS)(PDEVICE_OBJECT, PGPIOControl);
typedef struct { INTERFACE _vddInterface; GPIOOPEN gpioOpen; GPIOACCESS gpioAccess;} GPIOINTERFACE;
//==========================================================================;
#ifdef __cplusplus
}#endif // __cplusplus
#endif //__I2CGPIO_H__
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