MacOS – Mac Pro 3.1 with Yosemite won’t boot after GenericUSBXHCI USB 3.0 .kext added

I was trying to install drivers for my NEC USB 3.0 PCI card.
( propably http://sourceforge.net/projects/genericusbxhci/files/
or https://github.com/RehabMan/OS-X-Generic-USB3 )

I rebooted my mac into
kext-dev-mode=1

then i typed:
sudo kextcache -m /System/Library/Caches/com.apple.kext.caches/Startup/Extensions.mkext /System/Library/Extensions

GenericUSBXHCI .kext was enabled. Two other .kext too.

After restart – my usb 2.0 and usb 3.0 was working fine! Pendrvive was copying files very fast.

But unfortunetally magic mouse won't connect, so i restarted Mac Pro.

Now, booting is frozen. Sometimes at 1/3, sometimes at 1/2
I can't enter the Recovery Mode or Single user mode.

I was trying every possible ctrl+r, windows+r, alt+r, shift combinations on my logitech usb keyboard, but Yosemite just won't boot.

After freeze, computer reboots, and white screen of death appears.
Over and over again.

I have Yosemite installation disk image on my pen drive and Mavericks installator on my external hdd, but i wasn't able to start it.

I don't event know if efi sees my keyboard.

Maybe keybindings are the problem, cause i normally use oldshool DIN-5 mechanical keyboard from 1980' But the shortcuts from this keyboard won't work too.

What can I do to enter command line or repair .kext's ?

I have no other mac/pc to connect the hard drive.

UPDATE:
First success: Linux Mint booted and it's working fine. I can read my Mac SSD drive!
So i assume that hardware is all right. Even magic mouse is working under linux.

I have discovered installer.faliurerequests file on Mac drive. It says:
Operation fsck target CrashAtProgress 0

After rebooting from linux to Os X it was working like 10 minutes, artifacts appeared on the screen, and then crash again.
Next time it was working only 2 minutes… and now i can't boot it again.