From 8e02a8c64e6c37e7a0a3b5d0bd3d2e2c8edefff0 Mon Sep 17 00:00:00 2001
From: thePowersGang <tpg@mutabah.net>
Date: Thu, 2 Dec 2010 17:29:13 +0800
Subject: [PATCH] Draft Joystick spec (used for mouse driver)

---
 Kernel/include/tpl_drv_joystick.h | 84 +++++++++++++++++++++++++++++++
 1 file changed, 84 insertions(+)
 create mode 100644 Kernel/include/tpl_drv_joystick.h

diff --git a/Kernel/include/tpl_drv_joystick.h b/Kernel/include/tpl_drv_joystick.h
new file mode 100644
index 00000000..d5212071
--- /dev/null
+++ b/Kernel/include/tpl_drv_joystick.h
@@ -0,0 +1,84 @@
+/**
+ * \file tpl_drv_joystick
+ * \brief Joystick Driver Interface Definitions
+ * \author John Hodge (thePowersGang)
+ * 
+ * \section dirs VFS Layout
+ * Joystick drivers define a single VFS node, that acts as a fixed size file.
+ * Reads from this file return the current state, writes are ignored.
+ *
+ * \section File Structure
+ * The device file must begin with a valid sJoystick_FileHeader structure.
+ * The file header is followed by \a NAxies instances of sJoystick_Axis, one
+ * for each axis.
+ * This is followed by \a NButtons boolean values (represented using \a Uint8),
+ * each representing the state of a single button (where 0 is unpressed,
+ * 0xFF is fully depressed - intermediate values are valid in the case of
+ * variable-pressure buttons)
+ */
+#ifndef _TPL_JOYSTICK_H
+#define _TPL_JOYSTICK_H
+
+#include <tpl_drv_common.h>
+
+/**
+ * \enum eTplJoystick_IOCtl
+ * \brief Common Joystick IOCtl Calls
+ * \extends eTplDrv_IOCtl
+ */
+enum eTplJoystick_IOCtl {
+	/**
+	 * ioctl(..., struct{int Ident;tKeybardCallback *Callback})
+	 * \brief Sets the callback
+	 * \note Can be called from kernel mode only
+	 *
+	 * Sets the callback that is called when a event occurs (button or axis
+	 * change). This function pointer must be in kernel mode (although,
+	 * kernel->user or kernel->ring3driver abstraction functions can be used)
+	 */
+	JOY_IOCTL_SETCALLBACK = 4,
+
+	/**
+	 * ioctl(..., struct{int AxisNum;int Value})
+	 * \brief Set maximum value for sJoystick_Axis.CurState
+	 */
+	JOY_IOCTL_SETAXISLIMIT,
+	
+	/**
+	 * ioctl(..., struct{int AxisNum;int Value})
+	 * \brief Set axis flags
+	 */
+	JOY_IOCTL_SETAXISFLAGS,
+
+	/**
+	 * ioctl(..., struct{int ButtonNum;int Value})
+	 * \brief Set Button Flags
+	 */
+	JOY_IOCTL_SETBUTTONFLAGS,
+};
+
+/**
+ * \brief Callback type for JOY_IOCTL_SETCALLBACK
+ * \param Ident	Ident value passed to JOY_IOCTL_SETCALLBACK
+ * 
+ */
+typedef void (*tJoystickCallback)(int Ident, int bIsAxis, int Num, int Delta);
+
+/**
+ * \struct sJoystick_FileHeader
+ */
+struct sJoystick_FileHeader
+{
+	Uint16	NAxies;
+	Uint16	NButtons;
+};
+
+struct sJoystick_Axis
+{
+	Sint16	MinValue;
+	Sint16	MaxValue;
+	Sint16	CurValue;
+	Uint16	CurState;
+};
+
+#endif
-- 
2.20.1