USB

USB support provided with the 2.6 kernel is a little different from the 2.4 version. This page summarizes some of the differences.

When building the kernel, it is no longer necessary to have PCI support enabled to use USB. All ST parts use an OHCI controller (USB 1.1) and this can be enabled directly in the kernel configuration, together with any class drivers you require.

When your root file system is accessed through a USB device, it may be necessary to delay mounting the file system until the USB device has been recognised. This is done using the rootdelay= command line option, specifying a delay in seconds.

A similar problem exists when using the command line IP auto-configuration for USB attached Ethernet devices. In this case the command line option ipconfdelay= can be used, again the delay is in seconds.