From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from web33205.mail.mud.yahoo.com (web33205.mail.mud.yahoo.com [209.191.69.153]) by ozlabs.org (Postfix) with SMTP id 62C8267CB5 for ; Wed, 8 Nov 2006 12:00:21 +1100 (EST) Message-ID: <20061108005340.16693.qmail@web33205.mail.mud.yahoo.com> Date: Tue, 7 Nov 2006 16:53:40 -0800 (PST) From: john ke Subject: IDMA on MPC82xx To: linuxppc-embedded@ozlabs.org MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="0-1315510965-1162947220=:16685" List-Id: Linux on Embedded PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , --0-1315510965-1162947220=:16685 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Any one who has any experience when using IDMA on mpc82xx? Currently, the status what I have got is, memory-to-memory mode, both Data bus had been set to 60x-bus,which means DDTB and SDTB are working on 60x-bus. if set DMA_WRAP in DCM as 64-byte, SS_MAX,STS and DTS in (IDMA Parameter RAM) all to 32 Bytes, there woking good! But if set DMA_WRAP more than 64-byte(i.e 256-bytes) ,SS_MAX,STS and DTS in (IDMA Parameter RAM) all to 7*32 Bytes when WRAP = 256 . then got some issues: 1.some bytes in a packet had been changed oddly. for example if some bytes in the packet is "20 0f 17 2c...." after IDMA transmission , the bytes will be changed as "20 1d 17 2c", there is a slightly different with "17" and "1d". 2. some bytes had been swapped , for example "20 0f 17 2c" , after transmission , the bytes in packet was "2c 17 0f 20". any ideas? --------------------------------- Sponsored Link Try Netflix today! With plans starting at only $5.99 a month what are you waiting for? --0-1315510965-1162947220=:16685 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Any one who has any experience when using IDMA on mpc82xx?
Currently, the status what I have got is, memory-to-memory mode, both Data bus had been set to 60x-bus,which means DDTB and SDTB are working on 60x-bus. if set DMA_WRAP in DCM as 64-byte, SS_MAX,STS and DTS in (IDMA Parameter RAM) all to 32 Bytes, there woking good!
But if set DMA_WRAP more than 64-byte(i.e 256-bytes) ,SS_MAX,STS and DTS in (IDMA Parameter RAM) all to 7*32 Bytes when WRAP = 256 . then got some issues:
1.some bytes in a packet had been changed oddly. for example if  some bytes in the packet is "20 0f 17 2c...." after
IDMA transmission , the bytes will be changed as "20 1d 17 2c", there is a slightly different with "17" and "1d".
2. some bytes had been swapped , for example "20 0f 17 2c" , after transmission , the bytes in packet was "2c 17 0f 20".
any ideas?

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