usb

модулем собери и не ищи себе проблем :)

да я так и делаю :) просто инетерсно!

Читай описание:

1. Два для usb 1.1, причем есть для чипсетов intel, есть для via.
2. ECHI для usb 2.0

Вот и думай.

Не совсем UHCI используется почти во всех новых чипсетах. OHCI --- в основном был распространен в эпоху Socket7 и Slot1. По крайней мере и на i8xx и на Via kt* --- UHCI или EHCI.

Из документации к ядру - ehci.txt:

The EHCI driver is used to talk to high speed USB 2.0 devices using
USB 2.0-capable host controller hardware.  The USB 2.0 standard is
compatible with the USB 1.1 standard. It defines three transfer speeds:

    - "High Speed" 480 Mbit/sec (60 MByte/sec)
    - "Full Speed" 12 Mbit/sec (1.5 MByte/sec)
    - "Low Speed" 1.5 Mbit/sec

USB 1.1 only addressed full speed and low speed.  High speed devices
can be used on USB 1.1 systems, but they slow down to USB 1.1 speeds.

USB 1.1 devices may also be used on USB 2.0 systems.  When plugged
into an EHCI controller, they are given to a USB 1.1 "companion"
controller, which is a OHCI or UHCI controller as normally used with
such devices.  When USB 1.1 devices plug into USB 2.0 hubs, they
interact with the EHCI controller through a "Transaction Translator"
(TT) in the hub, which turns low or full speed transactions into
high speed "split transactions" that don't waste transfer bandwidth.

-----------
ohci.txt


It supports the "Open Host Controller Interface" (OHCI), which standardizes
hardware register protocols used to talk to USB 1.1 host controllers.  As
compared to the earlier "Universal Host Controller Interface" (UHCI) from
Intel, it pushes more intelligence into the hardware.  USB 1.1 controllers
from vendors other than Intel and VIA generally use OHCI.

Тут я перепутал, есть такая вещь.

uchi.txt:

...Correct, but its internal structure got more and more mixed up by the (still
ongoing) efforts to get isochronous transfers (ISO) to work.
Since there is an increasing need for reliable ISO-transfers (especially
for USB-audio needed by TS and for a DAB-USB-Receiver build by GA and DF),
this state was a bit unsatisfying in our opinion, so we've decided (based
on knowledge and experiences with the old UHCI driver) to start
from scratch with a new approach, much simpler but at the same time more
powerful.

А перепутал я, наверно, с чипсетом Ali, что ли. У них там были какие-то заморочки.