USB Host / OTG working (UPDATE: now self powered)

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Update October 28,2012:
h8rift figured out how to enable full OTG support with 5V power, no need for y-cable anymore!

You need to use a modified kernel for self powered OTG. Stock kernel has OTG but needs a y-cable connected to 5V power source, as explained below.



To enable powered OTG, you will need to use one of the following:

CM10 Nightly builds: http://forum.xda-developers.com/show....php?t=1790032

King Kang ROM: http://forum.xda-developers.com/show....php?t=1959099

rohan.kernel: http://forum.xda-developers.com/show....php?t=1892108

For Sense ROMs: http://forum.xda-developers.com/show....php?t=1967897




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To use OTG with stock kernel:


Here's what you need:

-an OTG cable
-a USB Y-cable
-a usb perhipheral (eg: mouse, keyboard, thumb drive, etc)


The key to this working is 5V on the uplink to the phone. Most usb hubs do not supply 5V on the uplink! This is why I suggest a Y-cable.

1. connect the perhipheral device to the Y-cable
2. connect the y-cable to the AC power adapter that came with your phone
3. connect the other end of the y-cable to an OTG cable
4. connect the OTG cable to your One X




Here's a screenshot showing the mouse pointer:




Notes:

-the OTG cable automatically sets the USB controller to host mode
-usb-hid seems to be built into the kernel, no modules need to be loaded
-usb storage works, but has to be mounted manually
-tested on stock kernel and scrosler's cleankernel

Cool. Kinda sucks that you need a separate 5v source.

^^yeah, there's not much you can do about that. I'm pretty sure there's no way the phone can supply the power.



Also, I can confirm usb storage works.

I attached a thumb drive and manually mounted it:

mkdir /mnt/usb
mount -t vfat /dev/block/sda1 /mnt/usb

Where did you get that clock?

Sent from my HTC One X using xda premium

Originally Posted by flar2

^^yeah, there's not much you can do about that. I'm pretty sure there's no way the phone can supply the power.



Also, I can confirm usb storage works.

I attached a thumb drive and manually mounted it:

mkdir /mnt/usb
mount -t vfat /dev/block/sda1 /mnt/usb

Any OTG cable is fine?

Sent from my HTC One X using xda premium

Originally Posted by abhipati

Any OTG cable is fine?

Sent from my HTC One X using xda premium

Any proper OTG cable (I got mine for like $3 on ebay). In an OTG cable, pin 4 on the micro usb side is grounded. This is how the device automatically senses that it should enter host mode.

Originally Posted by nightrainbow

Where did you get that clock?

Sent from my HTC One X using xda premium

Are you being serious? (It came with the phone)

But it has a brushed aluminum theme, no? So it's not stock.

Sent from my HTC One XL using Tapatalk 2

The Galaxy S II supplies power for USB host with a OTG cable ... stock

This is like the way you have to do it with a TouchPad, who carries around a portable USB power supply? If HTC wasn't going to give a MicroSD slot, you would think USB OTG would be officially supported.

Sent from my HTC One X

Does the phone at least charge in this mode so its somewhat useful?