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.\" Copyright 2016 Joyent, Inc.
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.Dd Nov 26, 2017
.Dt USBA_HCDI_CB_OPS 9F
.Os
.Sh NAME
.Nm usba_hubdi_cb_ops ,
.Nm usba_hubdi_open ,
.Nm usba_hubdi_ioctl ,
.Nm usba_hubdi_close
.Nd character device utility functions for HCD drivers
.Sh SYNOPSIS
.In sys/usb/usba/hubdi.h
.Ft int
.Fo usba_hubdi_open
.Fa "dev_info_t *dip"
.Fa "dev_t *devp"
.Fa "int flag"
.Fa "int otyp"
.Fa "cred_t *cred_p"
.Fc
.Ft int
.Fo usba_hubdi_ioctl
.Fa "dev_info_t *dip"
.Fa "dev_t dev"
.Fa "int flag"
.Fa "intptr_t arg"
.Fa "int mode"
.Fa "cred_t *cred_pp"
.Fa "int *rval_p"
.Fc
.Ft int
.Fo usba_hubdi_close
.Fa "dev_info_t *dip"
.Fa "dev_t dev"
.Fa "int flag"
.Fa "int otyp"
.Fa "cred_t *cred_p"
.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 dip
Pointer to the device's
.Sy dev_info
structure.
.El
.Pp
All other parameters are the same as the ones described and discussed in
.Xr open 9E ,
.Xr ioctl 9E ,
and
.Xr close 9E .
.Sh DESCRIPTION
The
.Fn usba_hubdi_open ,
.Fn usba_hubdi_ioctl ,
and
.Fn usba_hubdi_close
functions are functions provided for the implementation of USB HCD
drivers.
USB HCD drivers are required to implemnt the
.Xr open 9E ,
.Xr ioctl 9E ,
and
.Xr close 9E
.Xr cb_ops 9S
functions.
In each of those functions, they should use the device number to determine
number in
.Fa devp
or
.Fa dev
to determine the device's corresponding
.Sy dev_info_t .
The USB HCD driver's entry points should then call the corresponding
function described above, passing all the arguments they received
unmodified.
.Pp
The USB HCD driver's entry points should return the value returned by
the call to the corresponding USBA function.
.Sh CONTEXT
These functions should only be called from the context of a USB HCD
driver's
.Xr open 9E ,
.Xr ioctl 9E ,
and
.Xr close 9E
entry points.
.Sh SEE ALSO
.Xr close 9E ,
.Xr ioctl 9E ,
.Xr open 9E ,
.Xr usba_hcdi 9E ,
.Xr cb_ops 9S