em2874 bulk endpoint support

em2874 bulk endpoint support

[Dmitriy Fitisov]

Hello everyone,
I know, Devin Heitmueller was about to add support  for em2874 bulk endpoint.

Is that still in plans?

Thank you.
Dmitriy 

Copying old thread:
> On Oct 29, 2010, at 2:37 PM, Devin Heitmueller wrote:
>
> > On Fri, Oct 29, 2010 at 2:04 PM, Jarod Wilson <jarod at wilsonet.com
> wrote:
> >> On Oct 15, 2010, at 6:07 PM, Jarod Wilson wrote:...
> >> So a spot of bad news here... I've been poking at one of Gavin's sticks inside a VM he set up for me, simultaneous with talking to one of the upstream em28xx driver authors. We now have a very good understanding of why the stick isn't working.
> >> 
> >> All known prior em28xx-based tuner sticks have had at least one isochronous usb endpoint, with a max packet size of 940 bytes, typically. This stick only has bulk usb endpoints and a max packet size of 512. Supporting this stick is actually going to require a fair bit of work in the em28xx driver core to support using bulk transfer instead of isochronous transfer.
> >> 
> >> Short version: don't buy this stick right now, its going to be a little while before its actually supported.
> > 
> > Jarod,
> > 
> > Just an FYI:  bulk support for em2874/em2884 is on my todo list for
> > the near future.
>
>
 Ah, very cool. I'm inclined to wait and let you do that part, since you know em28xx much better than I do, and I'll just focus on the device-specific implementation details (gpio settings, wiring up tuner and demod, etc). I'm assuming you have some other manufacturer's em2874/em2884 based devices to work on this for... :)

Re: em2874 bulk endpoint support

[Devin Heitmueller]

On Thu, Jan 5, 2012 at 6:16 PM, Dmitriy Fitisov <dmitriy@radier.ca> wrote:
> Hello everyone,
> I know, Devin Heitmueller was about to add support  for em2874 bulk endpoint.
>
> Is that still in plans?

The project that I was slated to do this work for got cancelled, and
the only device I know of that requires bulk support is an obscure
K-world product.  It just didn't make any sense to waste the time for
one unpopular stick.

Regards,

Devin

-- 
Devin J. Heitmueller - Kernel Labs
http://www.kernellabs.com

Re: em2874 bulk endpoint support

[Frank Schäfer]

Am 06.01.2012 01:52, schrieb Devin Heitmueller:
> On Thu, Jan 5, 2012 at 6:16 PM, Dmitriy Fitisov<dmitriy@radier.ca>  wrote:
>> Hello everyone,
>> I know, Devin Heitmueller was about to add support  for em2874 bulk endpoint.
>>
>> Is that still in plans?
> The project that I was slated to do this work for got cancelled, and
> the only device I know of that requires bulk support is an obscure
> K-world product.  It just didn't make any sense to waste the time for
> one unpopular stick.

The Speedlink webcam "Vicious And Devine - Laplace" (em2765) would 
require bulk support, too:

http://www.vicious-and-divine.com/vicious/laplace.html
http://linuxtv.org/wiki/index.php/VAD_Laplace

Regards,
Frank