--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Keyboard/keyboard_chipset_api.h	Fri Jun 26 15:44:04 2009 +0100
@@ -0,0 +1,156 @@
+/*
+  keyboard_chipset_api.h
+
+  Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). 
+  All rights reserved.
+
+  This program and the accompanying materials are made available 
+  under the terms of the Eclipse Public License v1.0 which accompanies 
+  this distribution, and is available at 
+  http://www.eclipse.org/legal/epl-v10.html
+
+  Initial Contributors:
+  Nokia Corporation - initial contribution.
+
+  Contributors:
+*/
+
+/** @file
+@brief Keyboard Chipset API H
+
+This is the header file for Keyboard Chipset API that is used to access 
+the matrix keyboard and power key services provided by the third party chipset vendors.
+
+@publishedDeviceAbstraction
+*/
+
+#ifndef __KEYBOARD_CHIPSET_API_H__
+#define __KEYBOARD_CHIPSET_API_H__
+
+
+// Include files
+
+#include <kern_priv.h>
+#include <e32event.h>
+
+
+// Constants
+
+
+// Macros
+
+
+// Data types
+
+/**
+This defines the type of a callback function which is called to 
+notify a new key event to the client. The callback function is 
+executed in the context of the calling thread.
+*/
+typedef void (*TKeyboardEventCbFn)();
+
+// Function prototypes
+
+// Forward declarations
+
+// Class declaration
+
+/**
+This class defines the Chipset API that is used to access 
+the matrix keyboard service provided by the third party chipset vendors.
+*/
+class KeyboardMatrix
+    {
+    public:
+
+        /**
+        This function is used to do the necessary initialization with the given matrix size 
+        so that the chipset is ready to provide the matrix keyboard service. It registers 
+		a callback function which is called to notify a new key event.
+
+        @param aSize The size of matrix keyboard that the client is using.
+        @param aCallback The callback function which is called to notify a new key event.
+
+        @return Symbian OS system wide error code, and the followings are required:
+                KErrNone – the operation is successfully executed;
+                KErrGeneral – error condition;
+
+        @pre Pre-condition, it should be called before the other methods in the class are used.
+        */
+        IMPORT_C static TInt Init(TUint aSize, TKeyboardEventCbFn aCallback);
+
+        /**
+        This function is used to enable the matrix keyboard service.  
+
+        @return Symbian OS system wide error code, and the followings are required:
+                KErrNone – the operation is successfully executed;
+                KErrGeneral – error condition;
+
+        @pre Pre-condition, the matrix keyboard service has been initialized successfully.
+        */
+        IMPORT_C static TInt Enable();
+
+        /**
+        This function is used to disable the matrix keyboard service.
+
+        @return Symbian OS system wide error code, and the followings are required:
+                KErrNone – the operation is successfully executed;
+                KErrGeneral – error condition;
+
+        @pre Pre-condition, the matrix keyboard service has been enabled.
+        */
+        IMPORT_C static TInt Disable();
+
+        /**
+        This function is used to read the key state of the matrix keyboard.
+
+        @param aKeys   Reference to the number of keys that are currently pressed. 
+                       If the return value is 0 then it means all the previously pressed keys are released.
+        @param aBuffer Pointer to the buffer where all the key presses shall be reported.
+
+        @return Symbian OS system wide error code, and the followings are required:
+				KErrNone – the operation is successfully executed;
+                KErrGeneral – error condition;
+
+        @pre Pre-condition, the matrix keyboard service has been enabled.
+        */
+        IMPORT_C static TInt Read(TInt& aKeys, TInt* aBuffer);
+
+    };
+
+
+/**
+This class defines the Chipset API that is used to access 
+the power key service provided by the third party chipset vendors.
+*/
+class KeyboardPowerKey
+    {
+    public:
+
+        /**
+        This function is used to do the necessary initialization so that 
+        the chipset is ready to provide the power key service. It registers 
+        a callback function which is called to notify a new power key event.
+
+        @param aCallback The callback function which is called to notify a new power key event.
+
+        @return Symbian OS system wide error code, and the followings are required:
+                KErrNone – the operation is successfully executed;
+                KErrGeneral – error condition;
+        */
+        IMPORT_C static TInt Init(TKeyboardEventCbFn aCallback);
+
+        /**
+        This function is used to read the key state of the power key.
+
+        @param aState Reference to the variable that contains the power key state.
+
+        @return Symbian OS system wide error code, and the followings are required:
+                KErrNone – the operation is successfully executed;
+                KErrGeneral – error condition;
+        */
+        IMPORT_C static TInt Read(TRawEvent::TType& aState);
+
+    };
+
+#endif // __KEYBOARD_CHIPSET_API_H__