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Subject[PATCH] Input: xpad - update docs to reflect current state
Date
The last time this documentation was accurate was
just over 8 years ago. In this time we've added
support for two new generations of Xbox console
controllers and dozens of third-party controllers.

This patch unifies terminology and makes it explicit
which model of controller a sentence refers to.

It also expands certain sections to address the latest
versions of Xbox controllers.

Thus this documentation should now be useful to
end users and not contain out-right untruths.

This is the patch's second revision. Prior versions
of this patch altered the driver's TODO list. That
change has been pulled out of this documentation
update patch.

Signed-off-by: Daniel Dressler <danieru.dressler@gmail.com>
---
Documentation/input/xpad.txt | 123 +++++++++++++++++++++++++++++--------------
1 file changed, 83 insertions(+), 40 deletions(-)

diff --git a/Documentation/input/xpad.txt b/Documentation/input/xpad.txt
index 7cc9a43..d1b23f2 100644
--- a/Documentation/input/xpad.txt
+++ b/Documentation/input/xpad.txt
@@ -1,18 +1,22 @@
-xpad - Linux USB driver for X-Box gamepads
+xpad - Linux USB driver for Xbox compatible controllers

-This is the very first release of a driver for X-Box gamepads.
-Basically, this was hacked away in just a few hours, so don't expect
-miracles.
+This driver exposes all first-party and third-party Xbox compatible
+controllers. It has a long history and has enjoyed considerable usage
+as Window's xinput library caused most PC games to focus on Xbox
+controller compatibility.

-In particular, there is currently NO support for the rumble pack.
-You won't find many ff-aware linux applications anyway.
+Due to backwards compatibility all buttons are reported as digital.
+This only effects Original Xbox controllers. All later controller models
+have only digital face buttons.
+
+Rumble is supported on some models of Xbox 360 controllers but not of
+Original Xbox controllers nor on Xbox One controllers. As of writing
+the Xbox One's rumble protocol has not been reverse engineered but in
+the future could be supported.


0. Notes
--------
-
-Driver updated for kernel 2.6.17.11. (Based on a patch for 2.6.11.4.)
-
The number of buttons/axes reported varies based on 3 things:
- if you are using a known controller
- if you are using a known dance pad
@@ -20,12 +24,16 @@ The number of buttons/axes reported varies based on 3 things:
module configuration for "Map D-PAD to buttons rather than axes for unknown
pads" (module option dpad_to_buttons)

-If you set dpad_to_buttons to 0 and you are using an unknown device (one
-not listed below), the driver will map the directional pad to axes (X/Y),
-if you said N it will map the d-pad to buttons, which is needed for dance
-style games to function correctly. The default is Y.
+If you set dpad_to_buttons to N and you are using an unknown device
+the driver will map the directional pad to axes (X/Y).
+If you said Y it will map the d-pad to buttons, which is needed for dance
+style games to function correctly. The default is Y.
+
+dpad_to_buttons has no effect for known pads. A erroneous commit message
+claimed dpad_to_buttons could be used to force behavior on known devices.
+This is not true. Both dpad_to_buttons and triggers_to_buttons only affect
+unknown controllers.

-dpad_to_buttons has no effect for known pads.

0.1 Normal Controllers
----------------------
@@ -80,17 +88,29 @@ to the list of supported devices, ensuring that it will work out of the
box in the future.


-1. USB adapter
+1. USB adapters
--------------
+All generations of Xbox controllers speak USB over the wire.
+- Original Xbox controllers use a proprietary connector and require adapters.
+- Wireless Xbox 360 controllers require a 'Xbox 360 Wireless Gaming Receiver
+ for Windows'
+- Wired Xbox 360 controllers use standard USB connectors.
+- Xbox One controllers can be wireless but speak Wi-Fi Direct and are not
+ yet supported.
+- Xbox One controllers can be wired and use standard Micro-USB connectors.
+

-Before you can actually use the driver, you need to get yourself an
-adapter cable to connect the X-Box controller to your Linux-Box. You
-can buy these online fairly cheap, or build your own.
+
+1.1 Original Xbox USB adapters
+--------------
+Using this driver with an Original Xbox controller requires an
+adapter cable to break out the proprietary connector's pins to USB.
+You can buy these online fairly cheap, or build your own.

Such a cable is pretty easy to build. The Controller itself is a USB
compound device (a hub with three ports for two expansion slots and
the controller device) with the only difference in a nonstandard connector
-(5 pins vs. 4 on standard USB connector).
+(5 pins vs. 4 on standard USB 1.0 connectors).

You just need to solder a USB connector onto the cable and keep the
yellow wire unconnected. The other pins have the same order on both
@@ -102,26 +122,41 @@ original one. You can buy an extension cable and cut that instead. That way,
you can still use the controller with your X-Box, if you have one ;)


+
2. Driver Installation
----------------------

-Once you have the adapter cable and the controller is connected, you need
-to load your USB subsystem and should cat /proc/bus/usb/devices.
-There should be an entry like the one at the end [4].
+Once you have the adapter cable, if needed, and the controller connected
+the xpad module should be auto loaded. To confirm you can cat
+/proc/bus/usb/devices. There should be an entry like the one at the end [4].
+
+

-Currently (as of version 0.0.6), the following devices are included:
- original Microsoft XBOX controller (US), vendor=0x045e, product=0x0202
- smaller Microsoft XBOX controller (US), vendor=0x045e, product=0x0289
+3. Supported Controllers
+------------------------
+For a full list of supported controllers and associated vendor and product
+IDs see the xpad_device[] array[6].
+
+As of the historic version 0.0.6 (2006-10-10) the following devices
+were supported:
+ original Microsoft XBOX controller (US), vendor=0x045e, product=0x0202
+ smaller Microsoft XBOX controller (US), vendor=0x045e, product=0x0289
original Microsoft XBOX controller (Japan), vendor=0x045e, product=0x0285
- InterAct PowerPad Pro (Germany), vendor=0x05fd, product=0x107a
- RedOctane Xbox Dance Pad (US), vendor=0x0c12, product=0x8809
+ InterAct PowerPad Pro (Germany), vendor=0x05fd, product=0x107a
+ RedOctane Xbox Dance Pad (US), vendor=0x0c12, product=0x8809
+
+Unrecognized models of Xbox controllers should function as Generic
+Xbox controllers. Unrecognized Dance Pad controllers require setting
+the module option 'dpad_to_buttons'.
+
+If you have an unrecognized controller please see 0.3 - Unknown Controllers

-The driver should work with xbox pads not listed above as well, however
-you will need to do something extra for dance pads to work.

-If you have a controller not listed above, see 0.3 - Unknown Controllers
+4. Manual Testing
+-----------------
+To test this driver's functionality you may use 'jstest'.

-If you compiled and installed the driver, test the functionality:
+For example:
> modprobe xpad
> modprobe joydev
> jstest /dev/js0
@@ -134,7 +169,8 @@ show 20 inputs (6 axes, 14 buttons).
It works? Voila, you're done ;)


-3. Thanks
+
+5. Thanks
---------

I have to thank ITO Takayuki for the detailed info on his site
@@ -145,14 +181,14 @@ His useful info and both the usb-skeleton as well as the iforce input driver
the basic functionality.


-4. References
--------------

-1. http://euc.jp/periphs/xbox-controller.ja.html (ITO Takayuki)
-2. http://xpad.xbox-scene.com/
-3. http://www.markosweb.com/www/xboxhackz.com/
+6. References
+-------------

-4. /proc/bus/usb/devices - dump from InterAct PowerPad Pro (Germany):
+[1]: http://euc.jp/periphs/xbox-controller.ja.html (ITO Takayuki)
+[2]: http://xpad.xbox-scene.com/
+[3]: http://www.markosweb.com/www/xboxhackz.com/
+[4]: /proc/bus/usb/devices - dump from InterAct PowerPad Pro (Germany):

T: Bus=01 Lev=03 Prnt=04 Port=00 Cnt=01 Dev#= 5 Spd=12 MxCh= 0
D: Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=32 #Cfgs= 1
@@ -162,7 +198,7 @@ I: If#= 0 Alt= 0 #EPs= 2 Cls=58(unk. ) Sub=42 Prot=00 Driver=(none)
E: Ad=81(I) Atr=03(Int.) MxPS= 32 Ivl= 10ms
E: Ad=02(O) Atr=03(Int.) MxPS= 32 Ivl= 10ms

-5. /proc/bus/usb/devices - dump from Redoctane Xbox Dance Pad (US):
+[5]: /proc/bus/usb/devices - dump from Redoctane Xbox Dance Pad (US):

T: Bus=01 Lev=02 Prnt=09 Port=00 Cnt=01 Dev#= 10 Spd=12 MxCh= 0
D: Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1
@@ -173,7 +209,12 @@ I: If#= 0 Alt= 0 #EPs= 2 Cls=58(unk. ) Sub=42 Prot=00 Driver=xpad
E: Ad=82(I) Atr=03(Int.) MxPS= 32 Ivl=4ms
E: Ad=02(O) Atr=03(Int.) MxPS= 32 Ivl=4ms

---
+[6]: http://lxr.free-electrons.com/ident?i=xpad_device
+
+
+
+7. Historic Edits
+-----------------
Marko Friedemann <mfr@bmx-chemnitz.de>
2002-07-16
- original doc
@@ -181,3 +222,5 @@ Marko Friedemann <mfr@bmx-chemnitz.de>
Dominic Cerquetti <binary1230@yahoo.com>
2005-03-19
- added stuff for dance pads, new d-pad->axes mappings
+
+Later changes may be viewed with 'git log Documentation/input/xpad.txt'
--
2.1.0


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