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.\" 1.0 of the CDDL.
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.\" Copyright 2016 Joyent, Inc.
.\"
.Dd Nov 26, 2017
.Dt USBA_HCDI_REGISTER 9F
.Os
.Sh NAME
.Nm usba_hcdi_register ,
.Nm usba_hcdi_unregister
.Nd register and unregister HCD driver
.Sh SYNOPSIS
.In sys/usb/usba/hcdi.h
.Ft int
.Fo usba_hcdi_register
.Fa "usba_hcdi_register_args_t *args"
.Fa "uint_t flags"
.Fc
.Ft void
.Fo usba_hcdi_unregister
.Fa "dev_info_t *dip"
.Fc
.Sh INTERFACE LEVEL
.Sy Volatile -
illumos USB HCD private function
.Pp
This is a private function that is not part of the stable DDI.
It may be removed or changed at any time.
.Sh PARAMETERS
.Bl -tag -width Fa
.It Fa args
A pointer to a filled out registration structure.
See
.Xr usba_hcdi_register_args_t 9S
for the members to fill in.
.It Fa flags
Should be set to
.Sy 0 .
.It Fa dip
Pointer to the device's
.Sy dev_info
structure.
.El
.Sh DESCRIPTION
The
.Fn usba_hcdi_register
and
.Fn usba_hcdi_unregister
functions are used to register and unregister a USB HCDI driver from the
USBA framework.
.Pp
The
.Fn usba_hcdi_register
function is called during a device driver's
.Xr attach 9E
entry point after it has finished initializing the device.
After this function successfully returns, device drivers should assume that the
.Xr usba_hcdi_ops 9S
functions may be called at any time.
.Pp
The
.Fn usba_hcdi_unregister
function should be called during a driver's
.Xr detach 9E
entry point after it has unbound its root hub, but before the remainder
of the device's state is torn down.
After calling the
.Fn usba_hcdi_unregister
function, the driver will receive no more function calls to its
.Xr usba_hcdi_ops 9S
entry points.
.Pp
For more information on the initialization and finalization path of a
USB HCD driver, see
.Xr usba_hcdi 9E .
.Sh CONTEXT
The
.Fn usba_hcdi_register
function should only be called from a driver's
.Xr attach 9E
entry point.
.Pp
The
.Fn usba_hcdi_unregister
function should only be called frm a driver's
.Xr detach 9E
entry point.
.Sh RETURN VALUES
Upon successful completion, the
.Fn usba_hcdi_register
function returns
.Sy USB_SUCCESS .
Otherwise
.Sy USB_FAILURE
is returned to indicate that the device was not registered.
.Pp
The
.Fn usba_hcdi_unregister
function does not define any return values and always succeeds.
.Sh SEE ALSO
.Xr attach 9E ,
.Xr detach 9E ,
.Xr usba_hcdi 9E ,
.Xr usba_hcdi_ops 9S ,
.Xr usba_hcdi_register_args_t 9S