From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.dot4.com ([216.57.134.36]) by canuck.infradead.org with esmtp (Exim 4.33 #1 (Red Hat Linux)) id 1Bhwfe-0000l4-0A for linux-mtd@lists.infradead.org; Tue, 06 Jul 2004 16:36:06 -0400 Received: from [192.168.200.101] (unknown [192.168.200.101]) by mail.dot4.com (Postfix) with SMTP id 041D64117 for ; Tue, 6 Jul 2004 16:36:02 -0400 (EDT) Message-ID: <40EB0D28.60309@dot4.com> Date: Tue, 06 Jul 2004 16:35:52 -0400 From: "Thomas W. Nelson" MIME-Version: 1.0 To: linux-mtd@lists.infradead.org Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: MTD support on Motorola Hawk ASIC-based boards List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , We have the somewhat dubious honor of migrating a couple of customer's applications environments from VxWorks to TimeSys Linux on obsolete Motorola MVME2400 and MCP750 boards (the wheels of progress in certain defense and telecomm hardware venues turn *very* slowly). Everything else is working fine except we've been unable to get the MTD subsystem to successfully probe and recognize the 8 MB user flash on these boards. The basic configuration is nothing out of the ordinary: 4 AMD 29LV160BT (2 MB) devices in x16 mode, arranged in two 32-bit wide even/odd address banks. The one major quirk in the design is that the Hawk memory controller ASIC only permits 32-bit wide aligned writes to this array (any other type of write -> /dev/null, reads are unconstrained). We're very confident that we have the registers in the Hawk set up correctly and we've spent many hours trying all the chip type/bus width/interleave permutations available in the existing MTD implementation with no success. Therefore, before we embark on any inappropriate or unnecessary major surgery we wanted to ask the community for any suggestions, ideas, or other pearls of wisdom. Thanks for any assistance... -- Tom Nelson Sr. Consulting Engineer, Dot4, Inc. twn@dot4.com