Re: USB IR receivers and evdev

On Mon, Feb 12, 2007 at 10:10:07PM -0500, Jon Smirl wrote:
> On 2/12/07, Greg KH <[email protected]> wrote:
> >On Sun, Feb 11, 2007 at 03:20:20PM -0500, Jon Smirl wrote:
> >> Most drivers for USB IR remote controls are out of tree. They are 
> >located here:
> >> http://www.lirc.org/
> >>
> >> Why aren't these in-tree?
> >
> >Because the lirc developers do not have the time to submit them upstream
> >:(
> >
> >Feel free to clean them up and work with the developers to get them
> >upstream, I tried over a year ago and gave up...
> 
> How should IR receivers be handled in the kernel? For example the
> ati_remote2 support already in the kernel has a mapping table like
> this for keys that get passed up through evdev.
> 
> static struct {
> 	int hw_code;
> 	int key_code;
> } ati_remote2_key_table[] = {
> 	{ 0x00, KEY_0 },
> 	{ 0x01, KEY_1 },
> 	{ 0x02, KEY_2 },
> 	{ 0x03, KEY_3 },
> 	{ 0x04, KEY_4 },
> 	{ 0x05, KEY_5 },
> 	{ 0x06, KEY_6 },
> 
> This model breaks down when you point remotes from different
> manufacturers at the receiver.
> 
> You want a model more along the lines of:
> 1) receiving a xmit with a new manufacturer id cases an evdev device
> to be dynamically created
> 2) wait for user space to load a mapping table into new device (udev event?)
> 3) now start passing mapped events on up to user space.
> 
> LIRC passes up the full event to user space and then uses tables to
> decode it there. But that model eliminates using evdev.

I don't know what model to use, ask the input subsystem developers :)

thanks,

greg k-h

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