From 012eac6d8fc4e11d663994a7c62dc3f911454e9c Mon Sep 17 00:00:00 2001
From: Johannes Anderwald <johannes.anderwald@reactos.org>
Date: Wed, 28 Dec 2011 11:36:05 +0000
Subject: [PATCH 1/1] [USB-BRINGUP] - Implement mouse move detection, wheel
 state detection

svn path=/branches/usb-bringup/; revision=54772
---
 drivers/hid/mouhid/mouhid.c | 56 ++++++++++++++++++++++++++++++--
 drivers/hid/mouhid/mouhid.h | 65 ++++++++++++++++++++++++++++++++++++-
 2 files changed, 118 insertions(+), 3 deletions(-)

diff --git a/drivers/hid/mouhid/mouhid.c b/drivers/hid/mouhid/mouhid.c
index 22ca98bd19b..504f103f736 100644
--- a/drivers/hid/mouhid/mouhid.c
+++ b/drivers/hid/mouhid/mouhid.c
@@ -28,6 +28,35 @@ static USHORT MouHid_ButtonUpFlags[] =
     MOUSE_BUTTON_5_UP
 };
 
+VOID
+MouHid_GetButtonMove(
+    IN PDEVICE_OBJECT DeviceObject,
+    OUT PLONG LastX,
+    OUT PLONG LastY)
+{
+    PMOUHID_DEVICE_EXTENSION DeviceExtension;
+    NTSTATUS Status;
+
+    /* get device extension */
+    DeviceExtension = (PMOUHID_DEVICE_EXTENSION)DeviceObject->DeviceExtension;
+
+    /* init result */
+    *LastX = 0;
+    *LastY = 0;
+
+    /* get scaled usage value x */
+    Status =  HidP_GetScaledUsageValue(HidP_Input, HID_USAGE_PAGE_GENERIC, HIDP_LINK_COLLECTION_UNSPECIFIED, HID_USAGE_GENERIC_X, (PLONG)&LastX, DeviceExtension->PreparsedData, DeviceExtension->Report, DeviceExtension->ReportLength);
+    /* FIXME handle error */
+    ASSERT(Status == HIDP_STATUS_SUCCESS);
+
+    /* get scaled usage value y */
+    Status =  HidP_GetScaledUsageValue(HidP_Input, HID_USAGE_PAGE_GENERIC, HIDP_LINK_COLLECTION_UNSPECIFIED, HID_USAGE_GENERIC_Y, (PLONG)&LastY, DeviceExtension->PreparsedData, DeviceExtension->Report, DeviceExtension->ReportLength);
+    /* FIXME handle error */
+    ASSERT(Status == HIDP_STATUS_SUCCESS);
+
+}
+
+
 VOID
 MouHid_GetButtonFlags(
     IN PDEVICE_OBJECT DeviceObject,
@@ -146,6 +175,9 @@ MouHid_ReadCompletion(
 {
     PMOUHID_DEVICE_EXTENSION DeviceExtension;
     USHORT ButtonFlags;
+    LONG UsageValue;
+    NTSTATUS Status;
+    LONG LastX, LastY;
     MOUSE_INPUT_DATA MouseInputData;
 
     /* get device extension */
@@ -154,14 +186,34 @@ MouHid_ReadCompletion(
     /* get mouse change flags */
     MouHid_GetButtonFlags(DeviceObject, &ButtonFlags);
 
-    /* FIXME detect mouse move change */
-    /* FIXME detect mouse wheel change */
+    /* get mouse change */
+    MouHid_GetButtonMove(DeviceObject, &LastX, &LastY);
 
     /* init input data */
     RtlZeroMemory(&MouseInputData, sizeof(MOUSE_INPUT_DATA));
 
     /* init input data */
     MouseInputData.ButtonFlags = ButtonFlags;
+    MouseInputData.LastX = LastX;
+    MouseInputData.LastY = LastY;
+
+    /* detect mouse wheel change */
+    if (DeviceExtension->MouseIdentifier == WHEELMOUSE_HID_HARDWARE)
+    {
+        /* get usage */
+        UsageValue = 0;
+        Status = HidP_GetScaledUsageValue(HidP_Input, HID_USAGE_PAGE_GENERIC, HIDP_LINK_COLLECTION_UNSPECIFIED, HID_USAGE_GENERIC_WHEEL, &UsageValue, DeviceExtension->PreparsedData, DeviceExtension->Report, DeviceExtension->ReportLength);
+        if (Status == HIDP_STATUS_SUCCESS)
+        {
+            /* store wheel status */
+            MouseInputData.ButtonFlags |= MOUSE_WHEEL;
+            MouseInputData.ButtonData = (USHORT)UsageValue; /* FIXME */
+        }
+        else
+        {
+            DPRINT1("[MOUHID] failed to get wheel status with %x\n", Status);
+        }
+    }
 
     /* dispatch mouse action */
     MouHid_DispatchInputData(DeviceObject, &MouseInputData);
diff --git a/drivers/hid/mouhid/mouhid.h b/drivers/hid/mouhid/mouhid.h
index 0cd8320c2f0..39231f564f0 100644
--- a/drivers/hid/mouhid/mouhid.h
+++ b/drivers/hid/mouhid/mouhid.h
@@ -12,26 +12,89 @@
 
 typedef struct
 {
+    //
+    // lower device object
+    //
     PDEVICE_OBJECT NextDeviceObject;
+
+    //
+    // irp which is used for reading input reports
+    //
     PIRP Irp;
+
+    //
+    // event 
+    //
     KEVENT Event;
+
+    //
+    // device object for class callback
+    //
     PDEVICE_OBJECT ClassDeviceObject;
+
+    //
+    // class callback
+    //
     PVOID ClassService;
+
+    //
+    // mouse type
+    //
     USHORT MouseIdentifier;
+
+    //
+    // wheel usage page
+    //
     USHORT WheelUsagePage;
 
+    //
+    // usage list length
+    //
     USHORT UsageListLength;
+
+    //
+    // current usage list length
+    //
     PUSAGE CurrentUsageList;
+
+    //
+    // previous usage list
+    //
     PUSAGE PreviousUsageList;
+
+    //
+    // removed usage item list
+    //
     PUSAGE BreakUsageList;
+
+    //
+    // new item usage list
+    //
     PUSAGE MakeUsageList;
+
+    //
+    // preparsed data
+    //
     PVOID PreparsedData;
 
+    //
+    // mdl for reading input report
+    //
     PMDL ReportMDL;
+
+    //
+    // input report buffer
+    //
     PUCHAR Report;
-    ULONG ReportLength;
 
+    //
+    // input report length
+    //
+    ULONG ReportLength;
 
+    //
+    // file object the device is reading reports from
+    //
     PFILE_OBJECT FileObject;
 
 }MOUHID_DEVICE_EXTENSION, *PMOUHID_DEVICE_EXTENSION;
-- 
2.17.1