Develop Bugs

[WIP] USB Host support (working)

Hello!
I have been asked into looking for usb host support for nook touch. The hardware appears to be pretty similar to Nook Color, so there were no troubles in that area.
The kernel used by B&N for the Nook Touch is somewhat older than .32 kernel used for Nook Color, so the patch itself required some massage. Surprisingly B&N kernel already has usb host support compiled in, so you don't even need to change anything in kernel config, just apply the patch.
Just like in Nook Color, the id pin in the usb receptacle is not connected anywhere, so a special app is needed to switch the host mode on and off. The Nook Color usbhost switcher should work: https://github.com/verygreen/Nook-Color-usbhost-switcher though I cannot compile it for eclair, so I guess that needs some more massage and help here would be appreciated.
Meanwhile you can simply switch the mode from adb, type
Code:
echo host > /sys/devices/platform/musb_hdrc/mode
to enable usb host mode and type
Code:
echo peripheral > /sys/devices/platform/musb_hdrc/mode
to disable it.
The LED at the bottom that usually indicates charging status will light up in usb host mode even if the power is not connected.
The upside is you don't need a special OTG cable and can just use gender changer on your existing nook cable if you so desire.
Now, problems
I have not tracked why yet, but self powered mode only works when you try to enable it first with external power plugged in first.
The user-friendly tool for usbhost mode switching needs to be compiled for eclair
The self-powered mode is very faint. Keeps up with my keyboard, but not even with a simple usb hub.
Battery drain is significant, though not sure what part of it is attributed to the usbhost mode and what to adb over wifi
Eclair init is buggy so input devices are unusable without a patch, see commit 6405c6953fa02d41d9f6377f4cdb947604f481c4 in google tree to sytem/core/init. I am attaching recompiled init binary that works.
Attachments: binary.zip contains:
uImage - prebuilt 1.1 kernel with the patch
uRamdisk - root ramdisk with fixed init, adb over wifi
init - just recompiled init binary for those who might need it
usbhost_patch.zip - just the patch itself in it's current form.
THANKS TO:
andrewed, who asked me to do this and also provided me with a device. He is on a quest to touchtype on e-paper with a USB physical keyboard, all described here: Project: E-Paper Tablet (typable!)

Thats just awesome, thanks!

Now the only thing missing is a good ebook composer and publisher, and it becomes symetrical.

That is awesome! How about audio and serial ports?
Thanks!

bisbal said:
That is awesome! How about audio and serial ports?
Thanks!
Click to expand...
Click to collapse
Audio will most probably require external power source. Also to make audio work there would need to be some changes to the libaudio, likely similar in nature to stuff I did for Nook Color, only for this older release of Android.
Serial ports will likely work as is as I don't think they draw too much power. The kernel support for usbserial would need to be added of course.

Possibility for Bluetooth dongle? And thus audio?
Sent from my GT-I8150 using xda premium

Thiso said:
Possibility for Bluetooth dongle? And thus audio?
Click to expand...
Click to collapse
Should be possible, but would require external power for the bt dongle I would think.

Verygreen,
As of now, what is the use? Can I put an external keyboard as it is? Does it need a driver (or something of the sort) for that? Can I put a usb stick? Audio and BT, as I can see, need an extra effort...
Anyway, thank you for your effort. I thought I'd never see something like that for the STR.

apeine said:
Verygreen,
As of now, what is the use? Can I put an external keyboard as it is? Does it need a driver (or something of the sort) for that? Can I put a usb stick? Audio and BT, as I can see, need an extra effort...
Anyway, thank you for your effort. I thought I'd never see something like that for the STR.
Click to expand...
Click to collapse
You can use keyboard and mouse as is with just the files posted, no extra drivers need. Everything else would need more work at the android side.

for some phones it is possible to buy usb to audio jack converter, e.g.
http://www.amazon.com/Headphones-Ea...6?s=electronics&ie=UTF8&qid=1327504575&sr=1-6
I don't know how much effort and changes is needed on kernel side to make it work though.
---------- Post added at 04:26 PM ---------- Previous post was at 04:21 PM ----------
Do I need to copy all three binaries? Also, could you prepare uRamdisk with adb over usb (not wifi) enabled? Thank you in advance.

cceerrtt said:
for some phones it is possible to buy usb to audio jack converter, e.g.
http://www.amazon.com/Headphones-Ea...6?s=electronics&ie=UTF8&qid=1327504575&sr=1-6
I don't know how much effort and changes is needed on kernel side to make it work though.
Click to expand...
Click to collapse
Those are not applicable, since they aren't actually connected to the USB port. On some phones, the USB "plug" is modified to connect with extra pins -- which carry audio signal.

cceerrtt said:
Do I need to copy all three binaries? Also, could you prepare uRamdisk with adb over usb (not wifi) enabled? Thank you in advance.
Click to expand...
Click to collapse
You need the kernel uImage and uRamdisk files, init is already included.
As far as adb over usb is concerned, it's a bit pointless since there is only one usb receptacle, so you can either connect with adb over usb or connect some usb device, but not both at the same time.
That's why wifi makes more sense.

verygreen said:
Should be possible, but would require external power for the bt dongle I would think.
Click to expand...
Click to collapse
BT USB dongle consumes almost same as USB mouse
http://www.tomsguide.com/us/squeezing-more-life-out-of-your-notebook,review-583-26.html
Since USB mouse is working, BT USB might be feasible as well...

verygreen said:
You need the kernel uImage and uRamdisk files, init is already included.
As far as adb over usb is concerned, it's a bit pointless since there is only one usb receptacle, so you can either connect with adb over usb or connect some usb device, but not both at the same time.
That's why wifi makes more sense.
Click to expand...
Click to collapse
My point is that you don't need wireless access point with adb over usb. It is also more secure than adb over wifi with lower power consumption. Whenewer I need adb over wifi, I can enable it using one adb command. Moreover, using both adb and keyboard attached to nook would not be very frequent scenario (at least in my case).

Thiso said:
BT USB dongle consumes almost same as USB mouse
http://www.tomsguide.com/us/squeezing-more-life-out-of-your-notebook,review-583-26.html
Since USB mouse is working, BT USB might be feasible as well...
Click to expand...
Click to collapse
I've tried a few BT dongles and they can be detected without external power, but I have yet to figure out if BT communications can be driven without external power as well.

USB Host Mode Swicth for Nook Simple Touch
Attached is a Nook Simple Touch version of verygreens USB Host Mode switching app.
Requires properly installed "su" in /system/bin
Let me know if there are problems.

Let's hope so. But I have good hopes as BT intention is to be low power communication. In the post I was referring to earlier, the power communication of BT in use was similar to USB mouse in use...
Sent from my GT-I8150 using xda premium

Would this cable work for host? I've had cables refuse to work with other devices for no apparent reason before, and I don't really want to order something that won't work.
http://www.amazon.com/female-Micro-male-Cable-Adapter/dp/B005GI2VMG/ref=pd_vtp_e_77

TorimuNooter
I'll try to get this included in my TorimuNooter root! Maybe version 0.5 I'm working on 0.4 right now and I can't include your USB host support because it's not yet complete, but I will try to implement it as soon as I can.
Good work!

@Googie2149: Any standard USB cable will work as well as any other.
The ID pin on the micro USB connector on the Nook is not going anywhere so a special OTG cable is not required.
I loaded in the new uImage and uRamdisk and things act more consistently, but I still can't get a keyboard to work.
Neither of the two utilities out there seem to work correctly for me. I do have su installed. I have had more success with simple commands
Code:
echo host > /sys/devices/platform/musb_hdrc/mode
echo peripheral > /sys/devices/platform/musb_hdrc/mode
cat /sys/devices/platform/musb_hdrc/mode
One thing is clear; the Nook adheres to the USB standard for supplying power, that is, it supplies it for 100 millisecs and if the peripheral signals back correctly it continues to supply it. Issuing a host command cause the red LED to flash for about a 1/10 of a second. Supplying power on the red wire is not necessary for host communication.
My setup has a powered hub and a cable with the red lead not carried through. I can issue a host command but it never seems to communicate. The status reads back "a_wait_vrise".
Does anybody have any insight into the FSM to say what is going on?

[Q] USB OTG

Hi
Can someone answer if USB OTG is supported on the One V
using stock kernel and ROM?
Regards
max
EDIT: After some searching I found that "official" it is not suported
What surprises me is that in the kernel configuration of the stock
kernel all options are set that I would assume to allow OTG
e.g. there is something like
...
CONFIG_USB_MSM_OTG:
Enable this to support the USB OTG transceiver on MSM chips
...

Would be nice if someone could enable this for One V. This kernel project is enabling OTG for One X http://forum.xda-developers.com/showthread.php?t=1640532

Otg only works in bootloader....
Sent from my HTC One V using XDA

Hy
Actually we are talking here about USB-Host support and not USB-OTG
regards
max

maxwen said:
Hy
Actually we are talking here about USB-Host support and not USB-OTG
regards
max
Click to expand...
Click to collapse
Isn't it the same?
USB On-The-Go, often abbreviated USB OTG, is a specification that allows USB devices such as digital audio players or mobile phones to act as a host allowing a USB flash drive, mouse, or keyboard to be attached and also connecting USB peripherals directly for communication purposes among them.
http://en.wikipedia.org/wiki/USB_On-The-Go

Hi
hlavicka82 said:
Isn't it the same?
Click to expand...
Click to collapse
USB-OTG also means that you dont necessarily need a powered hub to use it AFAIK
And USB-OTG means that "both sides" can act as a client or a host
From your link above
...
USB OTG defines two roles of devices: OTG A-device and OTG B-device. This terminology defines which side supplies power to the link, and which is initially the host. The OTG A-device is a power supplier, and an OTG B-device is a power consumer. The default link configuration is that A-device act as USB Host and B-device is a USB peripheral. The host and peripheral modes may be exchanged later by using HNP. Because every OTG controller supports both roles, they are often called "Dual-Role" controllers rather than "OTG controllers"
...
Whereas USB-Host means that the android device is always the host
Since the HTC is not providing power on its USB port you always
need to use a powered usb hub in this case.
I am pretty sure that we can have USB-Host on the V since other devices
using exactly the same chipset can do it. But I still need to do some investigation
regards
max

Hi Guys
See attached screenshot and notice the "mouse pointer"
So it means we will have USB host support!
Actually not much was "missing" the guys at HTC just
"forgot" to register the usb host driver on init
At the moment the "mode" musst be switched manually
between "host" and "peripheral" which means e.g. charger a.s.o
The automatic switch based on using a OTG cable is not working
or I have the wrong cable
SO I was able to connect a active hub with a mouse and it works
Next thing will be a usb storage device
I will still need some more time to finalize this.
This will then continue in the Titanium-KISS kernel thread
regards
max

Lol why do you have an app for screen shots?
Sent from my GT-P7500 using xda app-developers app

Hi
Just a short update
-OTG cable detect working
that means switching between host and peripheral (normal) mode works
automatically. No need for a script anymore
-USB keyboard tested and works
-USB storage is still killing me
regards
max

Hi
Update:
http://forum.xda-developers.com/showthread.php?goto=newpost&t=1794497
Regards
max

Hi
Just found a nice other xda thread about USB host
http://forum.xda-developers.com/showthread.php?t=1820375
Info there applies nearly 1:1 to KISS kernel
regards
max

Hey...i am on stock rom and kernel..can uab otg work for me..if yes then tell me the setup...
Sent from my HTC One V using Tapatalk 2

I also wan to use otg on my one v.
Sent from mah Htc one V.

USB OTG

Hello guys I just want ask that what means usb otg?
Sent from my GT-I8150 using xda premium

Let me answer this question the last time, please link to this post if you see this question anywhere else...
USB OTG is a possibility to connect USB devices to the phone
USB OTG = hardware support + software support
our phone DOES NOT HAVE a hardware chip required for this so all kernel, ROM etc modifications are useless
we will never have USB OTG!

actually our chip can't direct power from the phone to the intended usb device, that's y usb OTG can't work on our phone
BUT a dedicated dev at xda has found a way to make it work for other chips that has our same problem through some tweaks and providing an external power supply for the usb devices
SO unless that dev starts working on our chip, we won't have OTG
for the original question, OTG : on the go i.e. u can blug a flash memory or a mouse or a keyboard (or wtvr u like) to ur phone through ur usb
press thanks if i help you

Second USB device

I tried connecting a USB keyboard using an USB OTG cable, but I didn't get it to work. The other USB port is in use by my external harddrive.
Is there a possibility to make the keyboard work?
Can immagine more people want to add a second USB device to their OUYA...

Dropshots said:
I tried connecting a USB keyboard using an USB OTG cable, but I didn't get it to work. The other USB port is in use by my external harddrive.
Is there a possibility to make the keyboard work?
Can immagine more people want to add a second USB device to their OUYA...
Click to expand...
Click to collapse
You'll need to buy a USB HUB (Get a powered one to future proof all your USB needs, you can get a USB 2.0 Hub pretty cheap). This will allow you to hook up at least 3 USB's to the OUYA. The Micro USB won't work for things such as hard drives or HID devices.
In the future, please use the search function before posting as this has been talked about in many other posts.

Dropshots said:
I tried connecting a USB keyboard using an USB OTG cable, but I didn't get it to work. The other USB port is in use by my external harddrive.
Is there a possibility to make the keyboard work?
Can immagine more people want to add a second USB device to their OUYA...
Click to expand...
Click to collapse
I have a 4-port hub and it works fine connecting 1 storage and 3 other usb devices

I had this issue where only one harddrive could be used and If you have a harddrive with 2 partitions ouya wont mount it. Luckily I found an app called usbotghelper which does all the above I mentioned plus read and write and ext3 support. I wish it would get submitted to the ouya store so I could use the paid version that will mount on startup.

OTG - On The Go

As the thread title states, I want to find out if the Wileyfox Swift support USB OTG? I have tried attaching a USB flash drive via the cable that used to work with my One Plus One that I had, but it does not respond when connected to the Wileyfox Swift. Any ideas? Thanks for any help!

Ill test it in 15 mins and get back to you.
I think I might have used OTG via TWRP recovery, but don't know about the ROM

Thanx for checking this. It would be great if there's a way to get this to work but I also wouldn't be surprised if the phone cannot support OTG.

It doesn't look like it is configured for OTG. It might be changeable via a custom kernel going by Chainfire's USB Host app.
I did not try the 'fix' in the second app as I don't have a current backup.

It might also not work because you have a wrong OTG cable since many microUSB cables won't work with the Swift

You might want to try using externally powered usb hub or Y shaped OTG cable to power the flash drive. I don't have any at the moment to try. Most likely it will turn out that the microUSB on the phone doesn't have the wiring to provide power (as it was for Nexus S but can be used if powered externally).

Maybe anybody can make OTG support in kernel and it will work with Y cable like on Nexus4?

r25txe said:
I did not try the 'fix' in the second app as I don't have a current backup.
Click to expand...
Click to collapse
seems like the 'fix' don't work...
h t t p : / / imgur.com/pY0zWOr

http://forum.xda-developers.com/showpost.php?p=65353312&postcount=84

cac2s said:
http://forum.xda-developers.com/showpost.php?p=65353312&postcount=84
Click to expand...
Click to collapse
Thanks for the update. As I stated in the beginning, I am not surprised that Wileyfox Swift doesn't support USB OTG. It's still a good phone despite this omission.

While the kernel that comes with it does not support USB-OTG, it is not impossible that a kernel with support could be built. The APIs are there, they just need instructions to call them.
I'm not too fussed about it, if it had no portable SD card support I would be annoyed, but having the card allows much of the usage cases of USB-OTG.