Converting linux keycodes to X keycodes

[Marvin Raaijmakers]

I made this table for the x86. The following translations are done:

|------------------kernel---------------------|-----------X server------------|
 scancode -> kernel keycode -> scancode related to kernel keycode -> X keycode
           |                 |
           V                 V
  +-----------------+ +-------------+
  | table can be    | | Fixed table |
  | modified using  | +-------------+
  | setkeycodes     |
  +-----------------+


So my table translates a kernel keycode to an X keycode. I do not know
how the X server does the scancode to X keycode translation, but if this
is done by using a fixed table (or 1:1), then the translation from
kernel keycode to X keycode can be done by using a fixed table.
As you can see the translation from kernel keycode to scancode related
to kernel keycode is quite useless, but must be done because xorg only
excepts scancodes. So it would be great if there was an input driver for
X that wants to receive kernel keycodes (from the evdev driver) and uses
them as the X keycodes (so: kernel keycode = X keycode). This is
actually the intent of the kernel keycode story in kernel 2.6.
Note that a kernel keycode is something like a X keysym for a scancode.
So no matter what platform (arm, x86, etc) or keyboard connection (USB,
PS/2, etc) you are using, the kernel keycode for key 'a' will always be
KEY_A.

- Marvin Raaijmakers

On Wed, 2006-05-31 at 23:27 -0700, Park Ji Wong wrote:

> Sorry to interrupt here,
> But i have a question, the keycode's value differ to each platform(arm, x86)?
> 
> 
> 
> 
> 2006/5/31, Marvin Raaijmakers <marvin.nospam at gmail.com>:
> > If the remote control is connected via USB it will not be possible to
> > set keycodes. At the moment I am trying to modify the input drivers to
> > make this possible.
> > If you can set the kernel keycode, then of course you can get the X
> > keycode by using xev. However you may find it easier to use the
> > translation table I made:
> >
> > /* Kernel keycode -> X keycode table */
> > const unsigned int keycode_table[256] = {
> > 	  0,   9,  10,  11,  12,  13,  14,  15,  16,  17,  18,  19,  20,  21,
> > 22,  23,
> > 	 24,  25,  26,  27,  28,  29,  30,  31,  32,  33,  34,  35,  36,  37,
> > 38,  39,
> > 	 40,  41,  42,  43,  44,  45,  46,  47,  48,  49,  50,  51,  52,  53,
> > 54,  55,
> > 	 56,  57,  58,  59,  60,  61,  62,  63,  64,  65,  66,  67,  68,  69,
> > 70,  71,
> > 	 72,  73,  74,  75,  76,  77,  76,  79,  80,  81,  82,  83,  84,  85,
> > 86,  87,
> > 	 88,  89,  90,  91, 111,  221, 94,  95,  96, 211, 128, 127, 129, 208,
> > 131, 126,
> > 	108, 109, 112, 111, 113, 181,  97,  98,  99, 100, 102, 103, 104, 105,
> > 106, 107,
> > 	239, 160, 174, 176, 222, 157, 123, 110, 139, 134, 209, 210, 133, 115,
> > 116, 117,
> > 	232, 133, 134, 135, 140, 248, 191, 192, 122, 188, 245, 158, 161, 193,
> > 223, 227,
> > 	198, 199, 200, 147, 159, 151, 178, 201, 146, 203, 166, 236, 230, 235,
> > 234, 233,
> > 	163, 204, 253, 153, 162, 144, 164, 177, 152, 190, 208, 129, 130, 231,
> > 209, 210,
> > 	136, 220, 143, 246, 251, 137, 138, 182, 183, 184,  93, 184, 247, 132,
> > 170, 219,
> > 	249, 205, 207, 149, 150, 154, 155, 167, 168, 169, 171, 172, 173, 165,
> > 175, 179,
> > 	180,   0, 185, 186, 187, 118, 119, 120, 121, 229, 194, 195, 196, 197,
> > 148, 202,
> > 	101, 212, 237, 214, 215, 216, 217, 218, 228, 142, 213, 240, 241, 242,
> > 243, 244,
> > 	  0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,
> > 0,   0
> > };
> >
> > I made this table for my project keyTouch (http://keytouch.sf.net). If
> > it is possible to the set keycodes for your remote control, then you can
> > even use this program to bind actions to it. KeyTouch assigns kernel
> > keycodes to scancodes, translates the kernel keycode to a X keycode and
> > executes an action when that keycode is pressed under X. By using the
> > keyTouch editor program you can make a so called keyboard file for your
> > remote control and import this keyboard file in keyTouch to get working.
> >
> > - Marvin Raaijmakers
> >
> > On Thu, 2006-06-01 at 08:59 +0300, Aivils Stoss wrote:
> >
> > > On Trešdiena, 31. Maijs 2006 20:31, Jeremy Wilkins wrote:
> > > > Hi All,
> > > >
> > > > I've got an ATI remote control, this worked great in older linux 2.6
> > > > kernels but the OK button has changed and now maps to linux keycode
> > > > 352 (KEY_OK). I've also managed to find the the scancode using
> > > > showkeys.
> > > >
> > > > How do I find the equivalent X keycode? I've tried xev, but this
> > > > appears to only work with keycodes up to 255?
> > >
> > > Linux kernel does not send keycodes > 255 to X. That is kernel limitation.
> > > Set another code on OK button.
> > >
> > > man setkeycodes
> > >
> > > Aivils Stoss
> > > _______________________________________________
> > > xorg mailing list
> > > xorg at lists.freedesktop.org
> > > http://lists.freedesktop.org/mailman/listinfo/xorg
> >
> >
> 
> 
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