Driver for Enhanced Host Controller Interface (EHCI) USB controllers
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You must be root to start this driver. |
io-usb -d ehci [option[,option...]] &
Neutrino
x86, MIPS, ARM, PPC, and SH
- en_sched
- Always enable the scheduler.
By default, the scheduler is enabled when there are devices connected.
- frame_list_size=num
- Set the size of the frame list: 1024 (the default), 512, or 256.
- int_thresh=num
- Interrupt microframe threshold.
Valid values are 1, 2, 4, 8, 16, 32, and 64.
The default value is 8, which is a 1 ms interrupt rate. The chip
will interrupt after a 1 ms period (USB frame) if there are completed
transactions. Setting the value to 1 lets the chip interrupt
after 125 us (USB microframe) if there are completed transactions.
- ioport=addr
- Register the base address. The default is to scan the PCI bus.
- irq=num
- The interrupt request number.
- memory=name
- Use the specified typed memory for DMA descriptors (endpoint descriptor,
transfer descriptors, and so on).
- nosmm
- Don't disable system management. The default is to disable it.
- num_ed=num
- The number of endpoint descriptors to preallocate.
- num_itd=num
- The number of Isoch transfer descriptors to preallocate;
the default is to use the global transfer descriptors pool as specified
by the num_td option.
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You must specify the num_itd option after the
ioport and irq options.
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- num_td=num
- The number of transfer descriptors to preallocate.
- pindex=num
- Instance of controller on PCI bus to apply argument.
- ports=port:port...
- Set the enumeration order of each root port.
Use colons to separate the port numbers.
- soft_retries=num
- The number of software retries for transaction errors.
The default is 6.
- verbose=num
- Set verbosity level.
The devu-ehci.so server provides support for
computers that have Enhanced Host Controller Interface (EHCI)
USB controllers. This server creates the
/dev/io-usb/devu-ehci.so device.
Scan PCI bus for all available controllers.
io-usb -dehci
If you specify arguments you'll need to include pindex arguments
for all controllers you wish to use. The value for the pindex
argument should start from 0.
Attach to the 1st and 3rd controller instance and set the verbose
argument on the 1st, as follows:
io-usb -dehci pindex=0,verbose=4,pindex=2 &
devu-ohci.so,
devu-uhci.so,
io-usb,
usb
Connecting Hardware
in the Neutrino User's Guide