I9100GBootloader¶

Signed versions¶

To get the bootrom to try to boot on USB, you need to do the following:

• Connect the USB cable to the device but make sure it's not connected on the computer.
• Power off the device
• Connect the USB cable

If we do that, we get the following in the kernel log of your laptop:

usb 1-1: new high-speed USB device number 24 using ehci-pci
usb 1-1: unable to get BOS descriptor or descriptor too short
usb 1-1: New USB device found, idVendor=0451, idProduct=d00f, bcdDevice= 0.00
usb 1-1: New USB device strings: Mfr=33, Product=37, SerialNumber=0
usb 1-1: Product: OMAP4430
usb 1-1: Manufacturer: Texas Instruments

We can also try to get a bit more infos with omap-usb-boot:

$ sudo omap-usb-boot -v -w boot invalidbootmedia
Finding and opening USB device
Found and opened omap4 USB device: OMAP4430
ASIC device id: 4430, HS device
Booting from device invalidbootmedia...
Booting device invalidbootmedia not found
Booting from device failed

Here we know the device is signed because it's a "HS device".
If it was not signed it would print "GP device" instead.

TODO¶

• Understand how to get unsigned versions (Android version, serial number, etc)
• Get a device with u-boot and ask samsung for source code