Develop Bugs

[Q] Is it possibile usb OTG?

Hi!
I tried OTG on my Wildfire (CyanogenMod 7.1) but, naturally, it doesn't work.
It recognizes the cable like a dock station and active the pen drive but doesn't mount it: can add an OTG support?
I also tried the Chainfire's app (USB Host Diagnostics) but it didn't say nothing.
Thanks.
Bye!
! !

[HOW-TO] Enable OTG(USB HOST) on Galaxy SII

So after painstakingly searching around for an answer on how to get OTG working on the galaxy s2 running a custom ROM and Kernal with little to no help i finally figured it out:
You will need:
OTG Cable ( Micro USB Host cable) (store bough or home made work, i followed this link: http://highonandroid.com/android-howtos/how-to-make-otg-usb-host-cable-for-galaxy-s2-or-xoom/ )
A Kernel that supports OTG ( I'm using { and could only find } http://www.gokhanmoral.com/gm/2012/05/06/siyahkernel-v3-2rc1/ , there is an update to this kernal , but i have not tested the OTG support yet (May/7)
And last but not least, USB Host Controller APP : https://play.google.com/store/apps/details?id=hu.sztupy.android.usbhostcontroller&hl=en
Procedures :
1. Install the kernel by flashing it through CWM
2.Install USB Host Controller App
3. Restart phone
4. plug in usb device into OTG cable
5. Plug in OTG Cable to phone
6. TADAA
if you have any questions feel free to PM me or post a reply...
i had to change the steps from the link to make the OTG cable to make it work!!!
Homemade Cable Troubleshoot:
my cable was a samsung USB U2 cable, i dont know if this makes the biggest difference. but you want to short ( connect) pins 4 and 5.. one of the 2 solder points is the black wire from the usb cable ( ground) and if yours doesnt work with the pin he says to use, you can try plugging in a usb device into the cable and have the wire connected to the ground and simply probe the other pins until you find the pin that works! ( DO NOT CONNECT BLACK AND RED I REPEAT DO NOT SHORT BLACK AND RED, YOU WILL FRY YOU PHONE AND I TAKE NO RESPONSIBILITY FOR THIS, THIS IS YOUR WARNING!!!)

This kernel can work with Galaxy s2 duos tv gt-s7273T ?
I,m trying enable the OTG to my s2 gt-s7273T
This is possible? Using Jelly Bean 4.2.2 stock rooted
With busybox installed .
Please if possible help me

WOW! I have a faulty micro sd card so I could only backup to internal storage. Saw your post which reminded me I have an OTG cable that I use for my Note 4, I'm using CM11 and "hey presto!" CM11 recognizes external USB, no apps needed, I could/can make backups, Love my CM11
Glad I saw your post, Many Thanks, and Kind Regards!!

OTG

Does Nokia N1 got OTG support? I have Tried to connect my USB Flash through OTG cable but doesn't work for me ....

Doesn't work for me either >_<

I don't have an otg cable myself (yet) but can you try to use USB Host Diagnostics (available in play store) and post the report?

FYI I got an OTG cable myself and it didn't work. I dug a bit deeper and found out that OTG is most likely not implemented because Nokia N1 is using legacy usb controller over usb C - see below:
Converting USB 2.0 OTG SoCs to USB Type-C
While existing Device, Host, and DRD devices can be converted to support the USB Type-C connection with some effort, it is not practical to convert existing OTG SoCs. OTG requires a new state machine using the configuration channel to support USB Type-C. Host Negotiation Protocol is used to swap host and device role for OTG, while Power Delivery communication is used to change roles for USB Type-C. Combined, these challenges preclude simple upgrades of OTC SoCs to USB Type-C. - See more at: https://www.synopsys.com/Company/Pu...esign-type-c-2015q1.aspx#sthash.Ri02Guwe.dpuf
Click to expand...
Click to collapse
The only chance to get otg to work is most likely preparing a kernel patch (are the sources even available?) to manually switch the connector to host mode and power the attached device externally

After a bit of hacking around I was able to enable usb otg on my N1!
I've had a look at kernel sources for device with similar SoC (Nexus Player) and saw an interesting debugfs entry. To my surprise it worked like a charm and immediately detected the attached usb hub with a thumb drive, it even powered the hub so I didn't have to use an external power source!
To enable host mode, the following command has to be enterted in root console:
echo A > /sys/kernel/debug/usb/dwc3_debugfs_root/otg_id
Caveats (will try to find a way to resolve them):
- after enabling host mode N1, won't charge from the usb port - a reboot is required to enable the charging again
- probably same is true for pheripherial mode (connecting n1 to a pc). In theory, changing a to b in the above echo command should bring the tablet back to normal mode but for some reason it won't charge without a reboot so I'm assuming that same is true for non otg usb connectivity. Will have a look at the sources and debug messages to find out what's going on

wodz69 said:
After a bit of hacking around I was able to enable usb otg on my N1!
I've had a look at kernel sources for device with similar SoC (Nexus Player) and saw an interesting debugfs entry. To my surprise it worked like a charm and immediately detected the attached usb hub with a thumb drive, it even powered the hub so I didn't have to use an external power source!
To enable host mode, the following command has to be enterted in root console:
echo A > /sys/kernel/debug/usb/dwc3_debugfs_root/otg_id
Caveats (will try to find a way to resolve them):
- after enabling host mode N1, won't charge from the usb port - a reboot is required to enable the charging again
- probably same is true for pheripherial mode (connecting n1 to a pc). In theory, changing a to b in the above echo command should bring the tablet back to normal mode but for some reason it won't charge without a reboot so I'm assuming that same is true for non otg usb connectivity. Will have a look at the sources and debug messages to find out what's going on
Click to expand...
Click to collapse
Thanks for your hard job.
I have tried on my N1. It is amazing that otg did work. However, the otg can not coexist with charging function as yours. Hope someone could find a solution.

adagiov said:
Thanks for your hard job.
I have tried on my N1. It is amazing that otg did work. However, the otg can not coexist with charging function as yours. Hope someone could find a solution.
Click to expand...
Click to collapse
Hey,
Are you on Android 5.1.1 or 5.0 ?
I've had a look at the code of the usb driver of the a phone with similar chipset (asus zenfone 5) and it seems that the source of the problem is that the tablet fails to detect an appropriate charger type, which could mean either that the otg cable does not support this or the code of the driver does not work properly with usb C. Was wondering if something changed around this after the update?

wodz69 said:
Hey,
Are you on Android 5.1.1 or 5.0 ?
I've had a look at the code of the usb driver of the a phone with similar chipset (asus zenfone 5) and it seems that the source of the problem is that the tablet fails to detect an appropriate charger type, which could mean either that the otg cable does not support this or the code of the driver does not work properly with usb C. Was wondering if something changed around this after the update?
Click to expand...
Click to collapse
Hi, mine N1 is still running the android 5.0.
I am afraid Root is the prerequisite to hack otg. Unfortunately, root is not available on android 5.1.1 till now, so even the android 5.1.1 driver support it, that won't help.
Thanks,dude.

Yeah exactly for that reason I haven't upgraded my tablet yet

[Q] USB OTG No longer works

Today I first used an OTG adapter, after last week OTA update, but to my surprise it no longer works.
I've tried with a couple of different adpaters, with mouse and USB drive that previously worked, but neither one works now.
Can anyone confirm? I'm on stock 2.20.40.58, bootloader locked, no root.
EDIT: Now it seems that my phone isn't even recognized in my PC ( I'm at work at the moment, and I used a couple of generics microUSB cables, with the same results ), only charging works fine. Did something broke? Or it is just me

I'm on the same firmware version and I can confirm that USB OTG works. Also the phone and external memory card are detected when a USB cable is plugged. in(tried 2-3 generic cables as well as the ASUS cable). You may want to update your USB drivers for the PC to see if the phone gets recognised.

N15H4NT said:
I'm on the same firmware version and I can confirm that USB OTG works. Also the phone and external memory card are detected when a USB cable is plugged. in(tried 2-3 generic cables as well as the ASUS cable). You may want to update your USB drivers for the PC to see if the phone gets recognised.
Click to expand...
Click to collapse
Thank you, now I'll check it more thoroughly when I get home.

I've managed to replace the USB board, and now OTG USB is working back, the phone is recognized on PC, but says "Device descriptor request failed" (I've tried with W10 on two different PCs, same results). A thread in ZenTalk mentions the issue in a Zenfone 5, but did all with no resukts

PS4 controller on S4 Mini Duos problem

Hello everyone!
I have got a Galaxy S4 Mini (I9192) and I try to connect my PS4 controller to it, in order to use PS4 modded remote control app, but the phone does not recognise it. I use CM13 latest build by @csendre , custom kernel by @DarkFrenzy and TWRP 3.0.2-1 by @ne0zone75 as well, but I cannot control the phone through my controller. Inside TWRP, in mount option, I cannot enable USB OTG, and using OTG Troubleshooter app, it has crosses on two last lines (not recognized by Linux and not recognised by Android). I have also connected USB flash drive without any luck... So, is there any way to use USB OTG or is it a hardware limitation of the phone?
Thank you a lot!

bobo1704 said:
Hello everyone!
I have got a Galaxy S4 Mini (I9192) and I try to connect my PS4 controller to it, in order to use PS4 modded remote control app, but the phone does not recognise it. I use CM13 latest build by @csendre , custom kernel by @DarkFrenzy and TWRP 3.0.2-1 by @ne0zone75 as well, but I cannot control the phone through my controller. Inside TWRP, in mount option, I cannot enable USB OTG, and using OTG Troubleshooter app, it has crosses on two last lines (not recognized by Linux and not recognised by Android). I have also connected USB flash drive without any luck... So, is there any way to use USB OTG or is it a hardware limitation of the phone?
Thank you a lot!
Click to expand...
Click to collapse
I did not use a controller with the S4 mini, however I used USB OTG functions with no issues, but you need to supply power so use a Y cable. Our hardware can not supply power through the USB port