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'\" te
.\" Copyright (c) 2004, Sun Microsystems, Inc., All Rights Reserved
.\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License"). You may not use this file except in compliance with the License.
.\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing. See the License for the specific language governing permissions and limitations under the License.
.\" When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE. If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
.TH USB_EP_DESCR 9S "Jan 5, 2004"
.SH NAME
usb_ep_descr \- USB endpoint descriptor
.SH SYNOPSIS
.LP
.nf
#include <sys/usb/usba.h>
.fi
.SH INTERFACE LEVEL
.sp
.LP
Solaris DDI specific (Solaris DDI)
.SH DESCRIPTION
.sp
.LP
The \fBusb_ep_descr_t\fR endpoint descriptor defines endpoint attributes. An
endpoint is a uniquely addressable portion of a USB device that is a source or
sink of data.
.sp
.LP
Please refer to Section \fI9.6.6\fR of the \fIUSB 2.0\fR specification. The
\fIUSB 2.0\fR specification is available at \fIwww.usb.org\fR.
.sp
.LP
One or more endpoint descriptors are retrieved from a USB device during device
enumeration. They can be accessed via \fBusb_get_dev_data\fR(9F).
.sp
.LP
A endpoint descriptor has the following fields:
.sp
.in +2
.nf
uint8_t bLength Size of this descriptor
in bytes.
uint8_t bDescriptorType Set to USB_DESCR_TYPE_EP.
uint8_t bEndpointAddress Endpoint address.
uint8_t bmAttributes Endpoint attrib. (see below.)
uint16_t wMaxPacketSize Maximum pkt size.
uint8_t bInterval Polling interval for interrupt
and isochro. endpoints.
NAK rate for high-speed control
and bulk endpoints.
Endpoint descriptor bEndpointAddress bitmasks contain address number
and direction fields as follows:
USB_EP_NUM_MASK Address bits
USB_EP_DIR_MASK Direction bit
USB_EP_DIR_OUT OUT towards device
USB_EP_DIR_IN IN towards host
Endpoint descriptor transfer type bmAttributes values and mask:
USB_EP_ATTR_CONTROL Endpoint supports control transfers
USB_EP_ATTR_ISOCH Endpoint supports isochronous xfers
USB_EP_ATTR_BULK Endpoint supports bulk transfers
USB_EP_ATTR_INTR Endpoint supports interrupt transfers
USB_EP_ATTR_MASK bmAttributes transfer-type bit field
Endpoint descriptor synchronization type bmAttributes values and mask
for isochronous endpoints:
USB_EP_SYNC_NONE Endpoint supports no synchronization
USB_EP_SYNC_ASYNC Endpoint supports asynchronous sync
USB_EP_SYNC_ADPT Endpoint supports adaptive sync
USB_EP_SYNC_SYNC Endpoint supports synchronous sync
USB_EP_SYNC_MASK bmAttributes sync type bit field
Endpoint descriptor feedback type bmAttributes values and mask for
isochronous endpoints:
USB_EP_USAGE_DATA Data endpoint
USB_EP_USAGE_FEED Feedback endpoint
USB_EP_USAGE_IMPL Implicit feedback data endpoint
USB_EP_USAGE_MASK bmAttributes feedback type bit fld
Endpoint descriptor additional-transaction-opportunities-
per-microframe wMaxPacketSize values and mask for high speed
isochronous and interrupt endpoints:
USB_EP_MAX_PKTSZ_MASK Mask for packetsize bits
USB_EP_MAX_XACTS_MASK Bits for additional transfers per
microframe
USB_EP_MAX_XACTS_SHIFT Left-shift this number of bits to
get to additional-transfers-per-
microframe bitfield
Endpoint descriptor polling bInterval range values:
USB_EP_MIN_HIGH_CONTROL_INTRVL Min NAK rate for highspd ctrl e/p
USB_EP_MAX_HIGH_CONTROL_INTRVL Max NAK rate for highspd ctrl e/p
USB_EP_MIN_HIGH_BULK_INTRVL Min NAK rate for highspd bulk e/p
USB_EP_MAX_HIGH_BULK_INTRVL Max NAK rate for highspd bulk e/p
USB_EP_MIN_LOW_INTR_INTRVL Min poll interval, lowspd intr e/p
USB_EP_MAX_LOW_INTR_INTRVL Max poll interval, lowspd intr e/p
USB_EP_MIN_FULL_INTR_INTRVL Min poll interval, fullspd intr e/p
USB_EP_MAX_FULL_INTR_INTRVL Max poll interval, fullspd intr e/p
Note that for the following polling bInterval range values, the interval
is 2**(value-1). See Section 9.6.6 of the USB 2.0 specification.
USB_EP_MIN_HIGH_INTR_INTRVL Min poll interval, highspd intr e/p
USB_EP_MAX_HIGH_INTR_INTRVL Max poll interval, highspd intr e/p
USB_EP_MIN_FULL_ISOCH_INTRVL Min poll interval, fullspd isoc e/p
USB_EP_MAX_FULL_ISOCH_INTRVL Max poll interval, fullspd isoc e/p
USB_EP_MIN_HIGH_ISOCH_INTRVL Min poll interval, highspd isoc e/p
USB_EP_MAX_HIGH_ISOCH_INTRVL Max poll interval, highspd isoc e/p
.fi
.in -2
.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(5) for descriptions of the following attributes:
.sp
.sp
.TS
box;
c | c
l | l .
ATTRIBUTE TYPE ATTRIBUTE VALUE
_
Architecture PCI-based systems
_
Interface stability Committed
.TE
.SH SEE ALSO
.sp
.LP
\fBattributes\fR(5), \fBusb_get_alt_if\fR(9F), \fBusb_get_cfg\fR(9F),
\fBusb_get_dev_data\fR(9F), \fBusb_get_string_descr\fR(9F),
\fBusb_parse_data\fR(9F), \fBusb_cfg_descr\fR(9S), \fBusb_ctrl_request\fR(9S),
\fBusb_dev_descr\fR(9S), \fBusb_dev_qlf_descr\fR(9S), \fBusb_if_descr\fR(9S),
\fBusb_other_speed_cfg_descr\fR(9S), \fBusb_string_descr\fR(9S)
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