devu-hcd-ohci.so

Runs on:

QNX OS

Options:

ioport=addr

Register the base address of the USB controller. The default is to scan the PCI bus.

irq=num

The interrupt request number.

isoptd=num

Restrict the number of isoch frames each TD can transfer (default 8).

memory=name

Use the specified typed memory for DMA descriptors (endpoint descriptor, transfer descriptors, and so on). The default is /memory/below4G.

nosmm

Don't disable system management. The default is to disable it.

num_ed=num

The number of endpoint descriptors to preallocate. The number specified is added to the minimum number of endpoint descriptors needed to set up the USB chip.

num_td=num

The number of transfer descriptors to preallocate. The number specified is added to the minimum number of transfer descriptors needed to set up the USB chip.

pindex=num

The instance of the controller on the PCI bus to apply subsequent options to. The value starts from 0.

verbose=num

Set the verbosity level.

Description:

The devu-hcd-ohci.so server provides support for computers that have Open Host Controller Interface (OHCI) USB controllers. This server creates the /dev/usb/devu-hcd-ohci.so device.

Examples:

Scan the PCI bus for all available controllers:

io-usb-otg -dohci

Attach to the 1st and 3rd controller instance and set the verbose option on the 1st, as follows:

io-usb-otg -dohci pindex=0,verbose=4,pindex=2 &