[Arm-netbook] JZ4775

[Paul Sokolovsky]

Hello,

On Fri, 30 May 2014 21:50:34 -0400
Stefan Monnier <monnier at iro.umontreal.ca> wrote:

> > shame about usb 1.1 arr well, yee have to make do.
> 
> Indeed, looks like a very odd choice.  Wonder what's the story behind
> that one.

Choice is obvious - it's so last-century for a USB2 to be *only* host
*or* device, because the latest USB2 standard supports dynamic role
switching, commonly known as OTG. That's exactly what JZ4775 has. As
for "dedicated 1.1 host" story, it's surely to help lazy bastards
for whom USB 2.0 is too complicated to write (steal) drivers.

The chip is cute though, and people have been wearing it on wrists for
as long as Gear crap:
http://en.smartdevice.com.cn/Products/Z-Watch/201309/26-238.html . I
doubt FSF would endorse Ingenic business model much though, like this
announcement [1] hints ("Since they will only provide source code to
“customers”..."). One can of course go and dig in
http://www.ingenic.cn/en/en/download.php?pid=857&fid=795 to see if
there's actually source, not blob, drivers for their 2d accel and video
decoder.

[1]
http://www.cnx-software.com/2014/04/02/ingenic-newton-platform-for-wearables-is-powered-by-mips-based-jz4775-soc/


>         Stefan


-- 
Best regards,
 Paul                          mailto:pmiscml at gmail.com