From owner-freebsd-usb@FreeBSD.ORG Thu Apr 30 12:13:21 2009 Return-Path: Delivered-To: freebsd-usb@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 44BEB1065674 for ; Thu, 30 Apr 2009 12:13:21 +0000 (UTC) (envelope-from freebsd-usb@dino.sk) Received: from loki.netlab.sk (loki.netlab.sk [84.245.65.11]) by mx1.freebsd.org (Postfix) with ESMTP id C94B98FC18 for ; Thu, 30 Apr 2009 12:13:20 +0000 (UTC) (envelope-from freebsd-usb@dino.sk) Received: from via.dino.sk (home.dino.sk [84.245.95.252]) (AUTH: PLAIN milan, TLS: TLSv1/SSLv3,256bits,AES256-SHA) by loki.netlab.sk with esmtp; Thu, 30 Apr 2009 14:10:24 +0200 id 0002E010.49F99530.00000F7E From: Milan Obuch To: Hans Petter Selasky Date: Thu, 30 Apr 2009 14:12:37 +0200 User-Agent: KMail/1.9.10 References: <200904301221.44674.freebsd-usb@dino.sk> <200904301258.37784.hselasky@c2i.net> In-Reply-To: <200904301258.37784.hselasky@c2i.net> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200904301412.38313.freebsd-usb@dino.sk> Cc: freebsd-usb@freebsd.org Subject: Re: u3g serial device name query X-BeenThere: freebsd-usb@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: FreeBSD support for USB List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 30 Apr 2009 12:13:21 -0000 On Thursday 30 April 2009 12:58:36 Hans Petter Selasky wrote: > On Thursday 30 April 2009, Milan Obuch wrote: > > Hi, > > > > I have HUAWEI 3g usb modem. It works with u3g from current. There is > > however one thing I did not get working yet. > > > > When device attaches, it is added into tree as u3gN, devd event is sent. > > It is easily matched with 'device-name "u3g[0-9]"' clause in devd.conf. I > > can start ppp automatically and it works well, given no other USB serial > > device is present. > > > > If another USB serial device such as uplcom is present, u3g serial ports > > does not have the same name. I found no way to relate serial device name > > to this event and looking in source I see no place where it is created. I > > would like to put a devctl notify call there. This way I could start ppp > > with correct device name even if there is some other USB serial device. > > > > Could someone point me in the right direction? > > USB serial devices have their own unit management. There is however a way > to override the unit number through the "usb2_com_tty_name" callback, which > requires some code changes to the u3g driver. > > All USB modems and serial adapters end up with the same naming > prefix: /dev/cuaU%d.%d, so the assigned numbers must be serialised. > > What we could do is to have a separate naming prefix for 3G modems, and use > the device_get_unit() for unit number. > > See: src/sys/dev/usb/serial and usb_serial.c > I looked over usb2_com_attach_tty function in usb_serial.c, and somewhere after call to tty_makedev (where a DPRINT is too) I could put a devctl call. All I need for it would be device name. In /var/log/message file I see a line telling 'u3g0 : Found 2 ports' just after usb2_com_attach_tty function is called. If you could tell me how I can get 'u3g0' name via sc argument in usb2_com_attach_tty function, I can solve this with no other change. Regards, Milan