44 replies to this topic

[Zhiming Zhou]

Hi:

I have downloaded Moto Razr i kernel source and gcc 4.4.3 for android (same with Xolo X900 kernel),
cause Xolo X900 kernel doesn't have /proc/config.gz file,
I have to take lots of time to checking Xolo X900 system config,
I made some modification to kernel config, and some code changes to some kernel codes,
now I can successfully build kernel modules for Xolo X900 ICS linux 3.0.8 kernel

Changes about these kernel modules:

1. Enable USB OTG mass storage support
2. Enable cifs support (mount Windows share folder)
3. Enable squashfs support (Squashfs 4.0 with xz compression)
4. USB network adapter, now support asix NIC
5. Enable USB CDROM support

I only have Xolo X900 with ICS 3.0.8 kernel, I'm not sure whether this works in Orange San Diego

You can download compiled kernel modules from this link:

http://miseal.google...nfig-modules.7z

Unpack it, there is a "x900.config" file, that is kernel configuration I use, FYI

You can use Root Explorer to copy "modules" directory in 7z to /system/lib directory,
cause lots of android app try to load modules from /system/lib/modules

You need root to load these modules on adb shell or any Terminal Emulator

Notes about USB OTG on Xolo X900:

You need external powered USB hub to use USB 2.0 device with OTG

And when I use usb disk with USB mass storage module (usb-storage.ko),
xolo x900 can recognize my usb disk (/dev/block/sda),
while I use dd command to test read spead:

busybox dd if=/dev/block/sda of=/dev/null bs=256k

USB error occurs and also scsi disk I/O error:

hub 1-1:1.0: cannot reset port 3 (err = -71)
hub 1-1:1.0: Cannot enable port 3.  Maybe the USB cable is bad?
hub 1-1:1.0: cannot disable port 3 (err = -71)

And next is the really weird part, if I connect usb disk to a USB 1.1 hub, and connect
hub to USB OTG of x900, dd read works fine, but u now, the spead is really slow for USB 1.1

I was wondering maybe there is some bug in Intel Medfield Penwell OTG driver,
cause this also occurs on my previous Lenovo K800 phone (also Intel Medfield)

I'm also trying to port this Moto Razr i kernel to Xolo X900~~~

Thanks

Regards
Uranus Zhou

-----------------------------------------------------------------------
use cifs:

insmod des_generic.ko
insmod md4.ko
insmod cifs.ko
mount -t cifs -o username=xxx,password=xxx //192.168.1.xxx/share /mnt

use USB to Serial adapter:

insmod usbserial.ko
insmod pl2303.ko

use USB asix network adapter:

insmod mii.ko
insmod usbnet.ko
insmod asix.ko

use USB mass storage:

insmod scsi_mod.ko
insmod sd_mod.ko
insmod usb-storage.ko

plug in usb disk, then u will see SCSI disk device like: /dev/block/sda

[flibblesan]

Good luck with porting the kernel. The only problem I see is that we are prevented from replacing the boot.img on the phone. If you flash an unsigned boot or recovery image it bricks the phone.

[Zhiming Zhou]

flibblesan, on 19 December 2012 - 12:36 PM, said:

Good luck with porting the kernel. The only problem I see is that we are prevented from replacing the boot.img on the phone. If you flash an unsigned boot or recovery image it bricks the phone.

if the phone failed to start from ported kernel, is it possible to flash phone to factory mode by recovery?

[jikobutsu]

Zhiming Zhou, on 19 December 2012 - 01:24 PM, said:

if the phone failed to start from ported kernel, is it possible to flash phone to factory mode by recovery?

You can use rickywyatts tool to fix brick, which can recover the device from just about anything.

Edited by jikobutsu, 20 December 2012 - 10:16 AM.

[Keeper-ZTE]

Hi all!

A group of Hungarian modders (tlac and ko9 prohardver.hu user) have modified the program for extracting the boot.img (boot binary) for Grand X In. I have just modified the program to (may) work with Xolo x900. Unfortunately we don't have config file either, but the Xolo kernel is closer to the Grand X In, than  the Motorola Razr I, because we got adb working with it and we were able to create dmesg log. Maybe if there would be a source code for Xolo that is capable of booting, it would be easier to port it to Grand X In. Grand X In have open bootloader, and we have "custom" kernel (unsecured "boot.img" (boot.bin) )

Pack-unpack tool source for Xolo x900 (I will try pack and unpack last update "kernel")

http://www.mediafire...alyazb4r321ooax

I hope it help!

[flibblesan]

The issue is not the lack of source.. the issue is the phone will only boot a signed image.. and we obviously don't have the signing keys.

[mmbika]

Man you are just great!

I have been long waiting for this USB OTG HOST stuff to work and wow, now finally thanks to genius guys I connected my OCX Vertex 4 SSD to XOLO and voila it worked...

Kudos to Zhiming Zou .....

I now want to use X-Box Wireless Controller with Xolo!

Any suggestion on how to charge and use OTG Host simultaneously?

Edited by mmbika, 23 December 2012 - 04:04 PM.

[Keeper-ZTE]

flibblesan, on 23 December 2012 - 04:01 PM, said:

The issue is not the lack of source.. the issue is the phone will only boot a signed image.. and we obviously don't have the signing keys.

I haven't got the Lava Xolo x900, only a ZTE Grand X In, but in this phone, the bootloader is fully unlocked, so I think it doesn't need any signing key.

[flibblesan]

Keeper-ZTE, on 23 December 2012 - 08:30 PM, said:

I haven't got the Lava Xolo x900, only a ZTE Grand X In, but in this phone, the bootloader is fully unlocked, so I think it doesn't need any signing key.

Ah you are lucky then. Sadly we do not have the kernel source and the kernels for the phone have been build without saving the config file so we cannot extract it from the kernel because it doesn't exist

[Zhiming Zhou]

mmbika, on 23 December 2012 - 04:03 PM, said:

Man you are just great!

I have been long waiting for this USB OTG HOST stuff to work and wow, now finally thanks to genius guys I connected my OCX Vertex 4 SSD to XOLO and voila it worked...

Kudos to Zhiming Zou .....

I now want to use X-Box Wireless Controller with Xolo!

Any suggestion on how to charge and use OTG Host simultaneously?

No I/O errors when read or write SSD through USB OTG host?

Need to make some modification to kernel to make charging and USB OTG work simultaneously,
while the biggest problem is the locked bootloader, for now we still can't flash unsigned boot image to XOLO X900

And runtime kernel switch (kexec) still hungs the phone

[Zhiming Zhou]

flibblesan, on 24 December 2012 - 03:47 AM, said:

Ah you are lucky then. Sadly we do not have the kernel source and the kernels for the phone have been build without saving the config file so we cannot extract it from the kernel because it doesn't exist

that's why I need to determine kernel config from current running kernel stats on XOLO X900,
check whether debug kernel is enabled, or other config options
really awful ~~~

[rickywyatt]

have you though about kexec to boot a kernel at boot

[t-bon3]

If the stock kernel doesn't support kexec I think its impossible, kexec requires the kernel which is active, and the kernel which is supposed to be booted to have the kexec patches.

[mmbika]

Zhiming Zhou, on 24 December 2012 - 07:26 AM, said:

No I/O errors when read or write SSD through USB OTG host?

Need to make some modification to kernel to make charging and USB OTG work simultaneously,
while the biggest problem is the locked bootloader, for now we still can't flash unsigned boot image to XOLO X900

And runtime kernel switch (kexec) still hungs the phone

I didn't get any I/O errors while reading from or writing to SSD. SSD always required to be externally powered to work even with PC and I used the same USB Y cable I use with powered hub/power pack to connect SSD to Xolo. It worked perfectly.

Edited by mmbika, 24 December 2012 - 09:38 AM.

[Zhiming Zhou]

rickywyatt, on 24 December 2012 - 08:45 AM, said:

have you though about kexec to boot a kernel at boot

current xolo kernel does support kexec, after loading new kernel by "kexec -l" command
and use "kexec -e" to execute new kernel, phone hangs then after a while, xolo x900 automaticly reboots

and I've tried to use kexec to load original offical kernel and initrd (unpacked from offical boot.img),
bad news is xolo x900 still hang and reboot

I think the XOLO X900 kernel should be patched to handle kexec correctly
some hardware initialize modification should be done to current kernel, like this:

http://lkml.org/lkml/2011/10/14/94

[Zhiming Zhou]

t-bon3, on 24 December 2012 - 08:52 AM, said:

If the stock kernel doesn't support kexec I think its impossible, kexec requires the kernel which is active, and the kernel which is supposed to be booted to have the kexec patches.

stock kernel does support kexec, but seems doesn't work by now (I use staticlly compiled kexec to load and execute new kernel)

[ayziaa]

Zhiming Zhou, on 24 December 2012 - 01:26 PM, said:

stock kernel does support kexec, but seems doesn't work by now (I use staticlly compiled kexec to load and execute new kernel)

I know nothing about this stuff so I wouldn't be able to help you, but wish you good luck with that because if you can make it work it would mean we could boot custom roms! Right?

[ashutosh00074]

Please tell me step by step how to unable usb otg host and how to use the x900.config

[jikobutsu]

ayziaa, on 24 December 2012 - 02:03 PM, said:

if you can make it work it would mean we could boot custom roms! Right?

No custom kernel.

Edited by jikobutsu, 28 December 2012 - 07:36 PM.

[ayziaa]

jikobutsu, on 28 December 2012 - 07:36 PM, said:

No custom kernel.

Yeah but kexec could bring custom kernels... so custom roms!