From owner-freebsd-hackers@freebsd.org Sat Jul 18 05:01:40 2020 Return-Path: Delivered-To: freebsd-hackers@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 EB6EF35D353 for ; Sat, 18 Jul 2020 05:01:40 +0000 (UTC) (envelope-from hps@selasky.org) Received: from mail.turbocat.net (turbocat.net [88.99.82.50]) (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 did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4B7wnb5xhSz3ZWT; Sat, 18 Jul 2020 05:01:39 +0000 (UTC) (envelope-from hps@selasky.org) Received: from hps2020.home.selasky.org (unknown [178.17.145.105]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mail.turbocat.net (Postfix) with ESMTPSA id A6E65260AA7; Sat, 18 Jul 2020 07:01:31 +0200 (CEST) Subject: Re: Question on structure of USB (specifically USB Serial) stack To: "Brian Mcgovern (bmcgover)" , Ian Lepore , "freebsd-hackers@freebsd.org" References: <82c1e5cede57ced764bfc3a33c75cc0b36a67660.camel@freebsd.org> From: Hans Petter Selasky Message-ID: <4504811e-9eed-d3a1-8d5e-561f7f3ce837@selasky.org> Date: Sat, 18 Jul 2020 07:01:07 +0200 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=windows-1252; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 4B7wnb5xhSz3ZWT X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=pass (mx1.freebsd.org: domain of hps@selasky.org designates 88.99.82.50 as permitted sender) smtp.mailfrom=hps@selasky.org X-Spamd-Result: default: False [-2.17 / 15.00]; TO_DN_EQ_ADDR_SOME(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; TO_DN_SOME(0.00)[]; R_SPF_ALLOW(-0.20)[+a:mail.turbocat.net]; MIME_GOOD(-0.10)[text/plain]; DMARC_NA(0.00)[selasky.org]; ARC_NA(0.00)[]; NEURAL_SPAM_SHORT(0.09)[0.091]; NEURAL_HAM_LONG(-1.01)[-1.011]; TO_MATCH_ENVRCPT_SOME(0.00)[]; NEURAL_HAM_MEDIUM(-0.95)[-0.953]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:24940, ipnet:88.99.0.0/16, country:DE]; RCVD_COUNT_TWO(0.00)[2]; RCVD_TLS_ALL(0.00)[] X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 18 Jul 2020 05:01:41 -0000 On 2020-07-17 01:18, Brian Mcgovern (bmcgover) wrote: > What I'm hoping to do is pin some USB devices with FTDI interfaces to more consistent name, similar to /dev/usb, based on the tree of struct usb_device entries and their respective addresses. You might get some ideas how to get struct usb_device inside ucom, by looking at this differential revision: https://reviews.freebsd.org/D21886 Basically you need to make a new API which is passed the uaa->device pointer. Then no void * casting will be needed. --HPS