From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753284Ab2L0QrC (ORCPT ); Thu, 27 Dec 2012 11:47:02 -0500 Received: from mail-pb0-f44.google.com ([209.85.160.44]:38448 "EHLO mail-pb0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753079Ab2L0QrA (ORCPT ); Thu, 27 Dec 2012 11:47:00 -0500 Subject: Re: What does ISA/PCI really mean to ARM architecture? From: anish kumar To: "jonsmirl@gmail.com" Cc: Woody Wu , kernelnewbies@kernelnewbies.org, linux-kernel In-Reply-To: References: <20121227082724.GA11775@zuhnb712.ap.bm.net> Content-Type: text/plain; charset="UTF-8" Date: Thu, 27 Dec 2012 22:16:42 +0530 Message-ID: <1356626802.5433.34.camel@anish-Inspiron-N5050> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 2012-12-27 at 11:22 -0500, jonsmirl@gmail.com wrote: > On Thu, Dec 27, 2012 at 3:27 AM, Woody Wu wrote: > > Hi, list > > > > I know this might be a very basic question. But I really don't clear at > > it. > > > > Can a peripheral chip that claims to be ISA or PCI device be used in a > > ARM based embedded system? For these kind of chips, I only concern > > about the planar kind of devices, means they are not on a dedicated > > expansion card. > > > > From hardware point of view, to attach a ISA or PCI planar chip, is > > there any requirement need to fulfill on a ARM board? > > See if your ARM CPU has an interface for SRAM (in addition to DRAM). > You can use a SRAM chip select to access ISA type devices. But you may Would you mind explaining this in detail? > need additional buffers/latches to do this. > > Another solution is to attach you peripherals using USB. Almost all Connect using USB what does this mean? > embedded wifi chips are attached this way. The USB connectors aren't > required, you can route USB around on your PCB. USB hub chips are > $0.35 if you need more ports. USB Ethernet chips are available. > > Other options include SPI/I2C. It is worthwhile to investigate these Only chips which support SPI/I2C can be used but ISA/PCI is completely orthogonal to this AFAIK. > serial solutions before doing a parallel solution. Parallel buses eat > up a lot of PCB space. > > > > > > From Linux driver point of view, what are needed to support an ISA or > > PCI driver in ARM architecture? More important, is ISA or PCI device a > > platform device? If not, how to add these kind of devices in my board > > definition? > > > > I know my question might not be reasonable enough, if I messed concepts, > > please sort me out. > > > > > > Thanks in advance. > > > > > > -- > > woody > > I can't go back to yesterday - because I was a different person then. > > -- > > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > > the body of a message to majordomo@vger.kernel.org > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > Please read the FAQ at http://www.tux.org/lkml/ > > > > -- > Jon Smirl > jonsmirl@gmail.com > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/