From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261314AbVFBJ2Y (ORCPT ); Thu, 2 Jun 2005 05:28:24 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261325AbVFBJ2Y (ORCPT ); Thu, 2 Jun 2005 05:28:24 -0400 Received: from sanosuke.troilus.org ([66.92.173.88]:61829 "EHLO sanosuke.troilus.org") by vger.kernel.org with ESMTP id S261314AbVFBJ0y (ORCPT ); Thu, 2 Jun 2005 05:26:54 -0400 To: kallol@nucleodyne.com Cc: linux-kernel@vger.kernel.org Subject: Re: SPI-4 device support on linux From: Michael Poole Date: Thu, 02 Jun 2005 05:26:52 -0400 In-Reply-To: <20050602023436.u0kjvng924e84g44@www.nucleodyne.com> (kallol@nucleodyne.com's message of "Thu, 02 Jun 2005 02:34:36 -0400") Message-ID: <87mzq9hzxf.fsf@sanosuke.troilus.org> User-Agent: Gnus/5.1007 (Gnus v5.10.7) Emacs/21.4 (gnu/linux) References: <20050602023436.u0kjvng924e84g44@www.nucleodyne.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org kallol@nucleodyne.com writes: > Hello, > We have been evaluating a project to develop linux driver > and stack for SPI-4 devices. SPI-4 stands for System Packet Interface > Level 4. > > While searching on internet I came across a few articles on SPI-4 protocol. > One of the links is given below: > > http://www.altera.com/products/devices/stratixgx/features/sgx-spi.html > > > Is there any update on linux driver support for SPI-4 devices? You can get the specifications for the SPI family of interfaces at http://www.oiforum.com/public/impagreements.html . However, it is an electrical (physical and link layer) interface. It does not specify a host interface, since the interesting feature of most devices is not an SPI-4 interface. There may be cards out there that do have SPI-4 interfaces and Linux drivers, but the two are not necessarily related: the likely problem areas for a device driver are those shared with any 10 Gbit card, and are not specific to SPI-4 cards. Michael Poole