This uses libudev for hotplug, but it's optional, so we'll just try to find
some reasonable defaults without it (maybe an older Linux box or under
FreeBSD's Linux emulation?).
It's been forcibly disabled since 2009, since the kernel apparently splits
these devices for us now, and apparently the code was crashing at the time
(see hg changeset 11c079bb52a8).
Also, it was a ton of messy #ifdefs in this file!
Chusslove Illich 2011-02-13 04:30:28 PST
Currently SDL_JOYSTICK_DEVICE environment variable can be used to add
exactly one topmost device. I think it would be nice if one could also set
several devices (e.g. a stick and a throttle) in this way, as a colon-
separated list. The attached patch implements this
Markus Rathgeb 2011-01-23 14:34:23 PST
With kernel 2.6.31 the struct input_absinfo defined in linux/input.h changed.
A field "__s32 resolution" was added at the end of the struct.
Because the macro EVIOCGABS(abs) is using the struct input_absinfo, it would be
better (IMHO) to change the declaration of variable values to
"int values[sizeof(struct input_absinfo) / sizeof(int)];" or using "struct
input_absinfo" directly.
Ludwig Nussel 2009-10-18 05:34:18 PDT
src/joystick/linux/SDL_sysjoystick.c has some problems:
- test_bit() might break with strict aliasing
- test_bit() assumes array is Uint32 but its actually "unsigned long"
on 64bit systems sizeof(long) != sizeof(Uint32).
- the keybit array is too small
- the arrays are unitialized so the number of
detected buttons is quite random
--HG--
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It looks like newer kernels do the logical device mapping in the driver,
so this code crashes. I don't have one of these nor do I have remote
access to debug this, so I'm disabling the logical mapping for now.
--HG--
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Port SDL 1.3 to the Nintendo DS
by Darren Alton, mentored by Sam Lantinga
--HG--
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Force Feedback for SDL
by Edgar Simo, mentored by Ryan C. Gordon
--HG--
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Check all joysticks instead of stopping if one has been removed.
--HG--
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From: Mike Frysinger
Subject: [SDL] [patch] remove limits.h hack from linux joystick code
there is a small hack in the current linux joystick code to work around broken
cross-compilers by including more than one limits.h ... at the very least,
this is not arm-specific by any means
i'm of the opinion that libsdl should not contain such things ... people
should be fixing their cross-compilers, not bloating other's source trees
patch attached to clean the cruft
-mike
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[Note: I'm applying this patch since it's a cleaner version of what's already implemented, and supports this controller on older kernels. I'll ask to make sure this doesn't break on the new kernels where it's no longer necessary]
Date: Mon, 21 Mar 2005 09:41:11 -0500
From: Chris Nelson
Subject: SDL Patch
Hey, Ryan.
I submitted the following patch about a year ago. It's just a simple
patch for the linux port, to make multiple joysticks each appear to SDL
as their own device, if they are on the same USB port (specifically,
these guys
<http://www.consoleplus.co.uk/product_info.php?pName=super-joybox-5-quad-joypad-converter>,
which allow 4 Playstation2 controllers to be accessed via a single USB
port). Without this patch, SDL pretty much drops the ball, and reports
that there are 4 joysticks available when less than that number are
plugged in.
My work built upon the work of another person with the same device. When
I submitted the patch to the list, he tested it, but it didn't work for
him, so the patch was never accepted. Maybe about 3 times in the past
year, I've tried to email the guy, to see if he couldn't run my new
version, complete with debug code to diagnose the problem he was having.
He never got back to me.
So, I'm attaching the patch. I wish I knew why it didn't work for him,
but I've been using it for the last year with no problems. Let me know
if you need any more information, or have any ideas as to how I could
test it. I'd like to see it in the tree, but I want to make sure it works.
-Chris
--HG--
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Make sure every source file includes SDL_config.h, so the proper system
headers are chosen.
--HG--
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FIXME:
Change #include <stdlib.h> to #include "SDL_stdlib.h"
Change #include <string.h> to #include "SDL_string.h"
Make sure nothing else broke because of this...
--HG--
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I batch edited these files, so please let me know if I've accidentally removed anybody's
credit here.
--HG--
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From: Andrew Fuller
Subject: [SDL] [PATCH] ML-8866 PS2->USB converter
This converter seems to go by several names -- Super Dual Box, Dual
USB Joypad, and who knows what else. Also branded differently with
different colour cases, etc. But it seems to all be the same
internals. It is a common converter used for StepMania, with several
posts Googleable trying to make it work in Linux. I got mine
yesterday and wanted to play stepmania, so I went ahead and made a
crude patch for libsdl to split this baby into two logical joysticks.
A couple notes about the patch:
This patch works well for two dance mats hooked up and playing
stepmania, however the mapping of the other buttons may be off. I
have no joystick which uses all the buttons the converter reports, so
I have no way of testing them.
The name I used 0925:8866 which is the USB ID, and what SDLjoytest-GL
reported is the name, even though lsusb shows Wisegroup, Ltd MP-8866
Dual USB Joypad, and the existing virtual joystick mapping uses the
Wisegroup... name. Not sure why the discrepency.
I'm not subscribed to this mailing list, so please CC me on any
comments to this.
-Andrew
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