From owner-svn-src-head@freebsd.org Mon Sep 7 07:44:15 2020 Return-Path: Delivered-To: svn-src-head@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 91F953EB9F3; Mon, 7 Sep 2020 07:44:15 +0000 (UTC) (envelope-from lwhsu@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4BlKzg3QvTz3Xb8; Mon, 7 Sep 2020 07:44:15 +0000 (UTC) (envelope-from lwhsu@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 5A5A71C227; Mon, 7 Sep 2020 07:44:15 +0000 (UTC) (envelope-from lwhsu@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id 0877iFXI082301; Mon, 7 Sep 2020 07:44:15 GMT (envelope-from lwhsu@FreeBSD.org) Received: (from lwhsu@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id 0877iF1V082300; Mon, 7 Sep 2020 07:44:15 GMT (envelope-from lwhsu@FreeBSD.org) Message-Id: <202009070744.0877iF1V082300@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: lwhsu set sender to lwhsu@FreeBSD.org using -f From: Li-Wen Hsu Date: Mon, 7 Sep 2020 07:44:15 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r365403 - head/share/man/man4 X-SVN-Group: head X-SVN-Commit-Author: lwhsu X-SVN-Commit-Paths: head/share/man/man4 X-SVN-Commit-Revision: 365403 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 07 Sep 2020 07:44:15 -0000 Author: lwhsu Date: Mon Sep 7 07:44:14 2020 New Revision: 365403 URL: https://svnweb.freebsd.org/changeset/base/365403 Log: Slightly improve usb(4) - Mention USB 3.0 - Update links - Fix `mandoc -T lint` warnings Reviewed by: bcr, hselasky MFC after: 3 days Differential Revision: https://reviews.freebsd.org/D26349 Modified: head/share/man/man4/usb.4 Modified: head/share/man/man4/usb.4 ============================================================================== --- head/share/man/man4/usb.4 Mon Sep 7 06:53:29 2020 (r365402) +++ head/share/man/man4/usb.4 Mon Sep 7 07:44:14 2020 (r365403) @@ -24,7 +24,7 @@ .\" .\" $FreeBSD$ .\" -.Dd April 24, 2018 +.Dd September 7, 2020 .Dt USB 4 .Os .Sh NAME @@ -52,8 +52,7 @@ for more information. .Sh DESCRIPTION .Fx provides machine-independent bus support and drivers for -.Tn USB -devices in host and device side mode. +USB devices in host and device side mode. .Pp The .Nm @@ -67,32 +66,25 @@ driver has three layers: The controller attaches to a physical bus like .Xr pci 4 . -The -.Tn USB -bus attaches to the controller, and the root hub attaches +The USB bus attaches to the controller, and the root hub attaches to the controller. Any devices attached to the bus will attach to the root hub -or another hub attached to the -.Tn USB -bus. +or another hub attached to the USB bus. .Pp The .Nm uhub device will always be present as it is needed for the root hub. .Sh INTRODUCTION TO USB -The -.Tn USB -is a system where external devices can be connected to a PC. +The USB is a system where external devices can be connected to a PC. The most common USB speeds are: .Bl -tag -width 6n -offset indent -.It Low Speed (1.5MBit/sec) -.It Full Speed (12MBit/sec) -.It High Speed (480MBit/sec) +.It Low Speed (1.5 MBit/sec) +.It Full Speed (12 MBit/sec) +.It High Speed (480 MBit/sec) +.It SuperSpeed (5 GBit/sec) .El .Pp -Each -.Tn USB -has a USB controller that is the master of the bus. +Each USB has a USB controller that is the master of the bus. The physical communication is simplex which means the host controller only communicates with one USB device at a time. .Pp @@ -122,9 +114,7 @@ A device may operate in different configurations. Depending on the configuration, the device may present different sets of endpoints and interfaces. .Pp -The bus enumeration of the -.Tn USB -bus proceeds in several steps: +The bus enumeration of the USB bus proceeds in several steps: .Bl -enum .It Any interface specific driver can attach to the device. @@ -144,11 +134,9 @@ debug message verbosity. Default is 0. .El .Sh SEE ALSO -The -.Tn USB -specifications can be found at: +The USB specifications can be found at: .Pp -.D1 Pa http://www.usb.org/developers/docs/ +.D1 Pa https://www.usb.org/documents .Pp .Xr libusb 3 , .Xr aue 4 , @@ -178,7 +166,7 @@ specifications can be found at: .Sh STANDARDS The .Nm -module complies with the USB 2.0 standard. +module complies with the USB 3.0 standard. .Sh HISTORY The .Nm