devu-hcd-imx8-xhci.so

Runs on:

QNX OS

Targets:

aarchle64

Options:

cerr=retries

Set the number of hardware retries. You can set retries to a value of 0 to 3, where 0 indicates unlimited retries. The default is 3 retries.

debug_listener

Starts the PPS debug command handler at /pps/usb/debug.

error_threshold=num

The number (num) of cumulative errors before triggering the driver to reinitialize. The error-based triggering is disabled by default.

ioport=addr

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

iosize=size

The register space size. The default is 64 kilobytes.

irq=num

The interrupt request number.

max_reinit_attempts=num

The maximum number of reinitializations allowed. No limit is the default.

memory=name

Set the typed-memory name for descriptors. The default is /memory/below4G.

prio=num

Set the pulse-handler thread's priority. The default is 21.

soft_retries=num_retries

Set the number of software retries for a failed transfer. Supported only on control, bulk, and interrupt endpoints. Software retries are disabled by default.

soft_retries_mask=num

Specifies the endpoints to use when software retries (soft_retries) are set. The endpoint to use is specified using a mask. The bit masks include:

• 0x1 – Control endpoint, which is set (ON) by default.
• 0x2 – Reserved endpoint, which isn't set (OFF). This bit should never be set.
• 0x4 – Bulk endpoint, which is set (ON) by default.
• 0x8 – Interrupt endpoint, which is set (ON) by default.

The default mask is 0xD, which indicates that the control, bulk, and interrupt endpoint bits are set (ON).

verbose=level

Set the verbosity level (0-7).

Description:

The devu-hcd-imx8-xhci.so driver provides support for computers that have Extensible Host Controller Interface (XHCI) USB controllers. This driver creates the /dev/usb/devu-hcd-imx8-xhci.so device.

Examples:

io-usb-otg -d hcd-imx8-xhci ioport=0x5b130000,irq=303