While trying to make H4 USB work I had the following issues,
attached are patches to fix those:

- Fix the H4 board config for the wiring of the ISP1301
  transceiver. The platform config had 4 wire configuration but
  the driver has the 3 wire mode hard-coded. It's also possible
  to set the ISP1301 to 4 wire mode, I wonder which one is more
  ideal?

- In the OMAP OHCI driver use 24xx specific clocks when running
  on 24xx. Rename variables for usb_dc/usb_lb and usb_hhc to the
  more generic usb_ick and usb_fck. Platforms other than OMAP1
  and 24xx are not supported by the driver at the moment.

- For OMAP OHCI SYSCON_2[UHOST_EN] needs to be set, otherwise we
  get an external abort at OHCI init time.

- Make the OMAP USB root hub power budget a platform specific
  option. Setting this to 0 will keep the current behaviour. There
  are boards not providing enough power for host mode, but still
  needing host mode functionality. This requires a special hub
  providing VBUS both on the downstream and upstream facing ports.
  For these .power_budget=-1 can be set meaning unlimited or
  no power budget control. Maybe a warning about the need for such
  a special hub would be nice?

- ISP1301 driver updated according to the new I2C framework.

- Update omap_h4_2420_defcofig to enable OTG, OHCI, Gadget
  driver. Use the onboard USB OTG plug instead of the download plug.

With these and the specail self powered hub, I have a working OTG,
at least I can connect in both host and gadget modes and can ping
through usb0/eth1.

--Imre