I've got a trivial patch here for kernel 2.6.8.1 for the xbox gamepad
usb input device (xpad.c)
Basically the current version maps the D-PAD to axes, but some DDR
(Dance Dance Revolution) style games need to know when both left/right
and top/down are being pressed at the same time.
I've added the ability to pass a parameter at module load time called
ddr_mode. If its 0 (default), the driver uses the old behavior with D-PAD
to axes mapping, if its 1, then D-PAD maps to BTN_0 - BTN_4. there's a small
message outputted as well notifying the user about this in dmesg/whatever.
this patch applies to 2.6.8.1 but I think it should work with any 2.6 kernel.
I'm not subscribed to any mailing lists, please CC me if you need to.
-Dom
patch follows:
--- drivers/usb/input/xpad.c.orig Mon Oct 11 08:41:08 2004
+++ drivers/usb/input/xpad.c Sun Oct 3 11:47:34 2004
@@ -1,8 +1,8 @@
/*
- * X-Box gamepad - v0.0.5
+ * X-Box gamepad - v0.0.6
*
* Copyright (c) 2002 Marko Friedemann <[EMAIL PROTECTED]>
- *
+ * 2004 Dominic Cerquetti <[EMAIL PROTECTED]>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
@@ -33,6 +33,7 @@
* - fine tune axes
* - fix "analog" buttons (reported as digital now)
* - get rumble working
+ * - distinction between usb id's for controllers and ddr pads?
*
* History:
*
@@ -52,6 +53,12 @@
* - fixed d-pad to axes mapping
*
* 2002-07-17 - 0.0.5 : simplified d-pad handling
+ *
+ * 2004-10-02 - 0.0.6 : added ddr mode - Dominic Cerquetti <[EMAIL PROTECTED]>
+ * - pass the option 'ddr_mode=1' to enable
+ * mapping D-PAD to buttons rather than axes
+ * needed for Dance Dance Revolution pads
+ *
*/
#include <linux/config.h>
@@ -60,10 +67,16 @@
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/module.h>
+#include <linux/moduleparam.h>
#include <linux/smp_lock.h>
#include <linux/usb.h>
-#define DRIVER_VERSION "v0.0.5"
+static int ddr_mode;
+module_param(ddr_mode, int, 0000);
+MODULE_PARM_DESC(ddr_mode,
+ "Map D-PAD to buttons rather than axes (for DDR
pads)");
+
+#define DRIVER_VERSION "v0.0.6"
#define DRIVER_AUTHOR "Marko Friedemann <[EMAIL PROTECTED]>"
#define DRIVER_DESC "X-Box pad driver"
@@ -80,9 +93,11 @@
{ 0x0000, 0x0000, "X-Box pad" }
};
+/* BTN_0 through BTN_4 used only for ddr_mode */
static signed short xpad_btn[] = {
BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, /* "analog" buttons */
BTN_START, BTN_BACK, BTN_THUMBL, BTN_THUMBR, /* start/back/sticks */
+ BTN_0, BTN_1, BTN_2, BTN_3, /* left,right,up,down */
-1 /* terminating entry */
};
@@ -142,8 +157,17 @@
input_report_abs(dev, ABS_RZ, data[11]);
/* digital pad */
- input_report_abs(dev, ABS_HAT0X, !!(data[2] & 0x08) - !!(data[2] & 0x04));
- input_report_abs(dev, ABS_HAT0Y, !!(data[2] & 0x02) - !!(data[2] & 0x01));
+ if (ddr_mode) {
+ /* report as buttons */
+ input_report_key(dev, BTN_0, (data[2] & 0x04) >> 2); // left
+ input_report_key(dev, BTN_1, (data[2] & 0x08) >> 3); // right
+ input_report_key(dev, BTN_2, (data[2] & 0x01)); // up
+ input_report_key(dev, BTN_3, (data[2] & 0x02) >> 1); // down
+ } else {
+ /* report as axes */
+ input_report_abs(dev, ABS_HAT0X, !!(data[2] & 0x08) - !!(data[2] &
0x04));
+ input_report_abs(dev, ABS_HAT0Y, !!(data[2] & 0x02) - !!(data[2] &
0x01));
+ }
/* start/back buttons and stick press left/right */
input_report_key(dev, BTN_START, (data[2] & 0x10) >> 4);
@@ -344,8 +368,16 @@
static int __init usb_xpad_init(void)
{
int result = usb_register(&xpad_driver);
+
if (result == 0)
info(DRIVER_DESC ":" DRIVER_VERSION);
+
+ if (ddr_mode) {
+ info("DDR mode enabled.");
+ } else {
+ info("For DDR pads, pass ddr_mode=1");
+ }
+
return result;
}
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