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abeowitz
Punch Card
Posts: 25
Registered: ‎02-06-2012
Location: Seattle, WA USA
Views: 2,998
Message 1 of 23

Add an internal USB connection

This has potential to add a tiny USB device through the unused larger PCIe slot inside the tablet.  (Assuming you're not already using it for 3G.)

 

The internal PCIe slot did recognize my Intel 5350 WiMax chipset, as a USB device.  Just couldn't do anything with it.  So, theoretically, we could use this slot for tiny USB sticks, wireless mice and whatever else this kernel is built to support.

 

PM3U_M_2.jpg

 

Source:

http://www.hwtools.net/Adapter/PM3U.html

 

I'll see if I can find a local distributor in the USA...

 

abeowitz
Punch Card
Posts: 25
Registered: ‎02-06-2012
Location: Seattle, WA USA
Views: 2,993
Message 2 of 23

Re: Add an internal USB connection

Erg.  It appears the spec for PCIe is only 3.3 volts, not 5, so that would limit a number of devices...

 

OTOH, it's cheap enough to test and the risk of bricking your tablet is low. 

 

I'll likely order one next week and let you know how it works out...

 

abeowitz
Punch Card
Posts: 25
Registered: ‎02-06-2012
Location: Seattle, WA USA
Views: 2,984
Message 3 of 23

Re: Add an internal USB connection

This looks promising.  I requested a quote.  The chipset uses the USB bus.

 

1507840_lg.jpg

 

http://www.globalamericaninc.com/commell-mpx-827.html

 

 

rlogie
Paper Tape
Posts: 2
Registered: ‎02-10-2012
Location: Ballarat, Australia
Views: 2,897
Message 4 of 23

Re: Add an internal USB connection

abeowitz
Punch Card
Posts: 25
Registered: ‎02-06-2012
Location: Seattle, WA USA
Views: 2,863
Message 5 of 23

Re: Add an internal USB connection

Rlogie,

That first GPS might work. Make sure you get an internal antenna with it. Question is if the linux kernel build supports it, how to configure it, etc. For that, we'd need root.

The SSD drives are likely not going to work, as this kernel doesn't seem to have PCI support built in. There might be a few, but expensive USB SSD's from the EeePC world that predated the mSATA interface... Not sure, still researching.

My mSATA drive did not work in this tablet, nor did I expect it to. Not all PCIe ports are wired for it.

The wifi card appears to use the SPI bus, but I'm still learning that, too.

so, in short, only PCIe devices that use the USB portion may work. Requirement #2 is there is kernel support. requirement #3 is Android support.
abeowitz
Punch Card
Posts: 25
Registered: ‎02-06-2012
Location: Seattle, WA USA
Views: 2,792
Message 6 of 23

Re: Add an internal USB connection

OK, I just received a USB port and a mini T-Flash adapter for the internal PCIe port from the Chinese company.  (They shipped REAL fast, so I recommend them.)

 

And they almost work...

 

The kernel recognizes both cards/drives just fine as /dev/sg0, BUT unfortunately, I don't have root, so I cannot mount or do anything with /dev/sg0. 

 

External USB sticks show up as /dev/sda, recognized and mounted automatically.  Unfortunately, Lenovo has not provisioned for /dev/sg0...  Smiley Sad

 

So much potential in this tablet, locked away, just out of reach... sigh...

 

abeowitz
Punch Card
Posts: 25
Registered: ‎02-06-2012
Location: Seattle, WA USA
Views: 2,776
Message 7 of 23

Re: Add an internal USB connection

Actually, I'm confusing myself...

 

I do see /dev/sda there...  And it matches the size of the USB stick...

 

But it's not being mounted... 

 

So, hold on to your hats, perhaps I need to format it differently... :/

abeowitz
Punch Card
Posts: 25
Registered: ‎02-06-2012
Location: Seattle, WA USA
Views: 2,770
Message 8 of 23

Re: Add an internal USB connection

Enh, same USB stick works fine externally, but not internally, despite being /dev/sda in both cases.

 

Not sure what's different between the two, unless there are rules to limit USB mounts only on a specific USB hub?

 

Oh well, it was worth trying...

twospirits
HDMI
Posts: 259
Registered: ‎11-29-2011
Location: NYC, United States
Views: 2,766
Message 9 of 23

Re: Add an internal USB connection

**bleep** For a moment i thought you got it.

 

Edit: Seriously? the word "d a m n" is bleeped out, lol wow

 

TS

pghFL
WWAN
Posts: 1,773
Registered: ‎08-17-2011
Location: USA
Views: 2,755
Message 10 of 23

Re: Add an internal USB connection

LOL That's why I always use darn. I don't normally use darn, but just knew anything more would be edited. Smiley Frustrated

===================
Don't get mad, get root.
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