Update libusb to v1.0.26, including our patches

[igor-hnizdo]

Also add documentation on how to update

[prusnak]

We don't need the following files, so please remove then from the PR:

usb/lowlevel/libusb/c/Makefile*
usb/lowlevel/libusb/c/libusb-1.0.def
usb/lowlevel/libusb/c/libusb-1.0.rc
usb/lowlevel/libusb/c/os/haiku*
usb/lowlevel/libusb/c/os/linux_udev.c
usb/lowlevel/libusb/c/os/netbsd_usb.c
usb/lowlevel/libusb/c/os/null_usb.c
usb/lowlevel/libusb/c/os/openbsd_usb.c
usb/lowlevel/libusb/c/os/sunos_usb.c
usb/lowlevel/libusb/c/os/sunos_usb.h

[igor-hnizdo]

OK. Also the instructions are a bit wrong, will update them

[igor-hnizdo]

Fixed, please review again and possibly merge

[igor-hnizdo]

@tsusanka

1. we detect missing WinUSB driver in the C code, which we cannot do in the go code. If my memory serves well, it detects missing auto-installed WinUSB driver. I forgot what we do with that information later.
2. we skip non-trezor faster, I remember that used to cause some issues
3. we have custom code for cancelling sync transfer, to support cancelling. If we wanted to use libusb, we would need to rewrite the go USB code to async transfers
4. we have some dumb function name clash with HIDApi and LibUSB windows_open

Those are the 4 things we need custom code for.

[igor-hnizdo]

Ah, no, 1. and 2. are the same thing.

We detect missing WinUSB driver and then skip this device.

If we don't have this code, Trezor with missing WinUSB driver shows in listing, but then it errors on read/write with some mysterious error.

It's issue with Windows and WinUSB. It was mostly an issue on older Windows (7, Vista), but I remember it can potentially be an issue in Win10.... maybe? I don't remember.

[igor-hnizdo]

Yeah it was only issue with 7 and Vista.

If we don't care about Windows 7 and Vista, we can remove the custom code with has_winusb_driver, and also remove a lot of other cruft.

(The wdi-simple.exe can definitely can be removed, as that is run only when user has Windows 7 or Vista.)

[igor-hnizdo]

Windows 7 is officially not supported by even Microsoft anymore, but, it still has more marketshare than all MacOS versions together. (Let alone all Linux versions together.)

It's your call if you want to cut the support :)

[igor-hnizdo]

Let's move it here

273

[tsusanka]

Great info, thx 👍 .