Hi, Ivan, Thanks for replying.
I have used non-cached memory for EDMA. EDMA has some issue with cache but I am not looking into that matter right now. Currently I am trying to run driver for Davinci MMC/SD controller in Interrupt and polling mode using uncached memory. Do respond If you have solution for either of problems. Thanks in advance. Sarfraz ----- Original Message ---- From: Ivan Tonchev <[EMAIL PROTECTED]> To: Sarfraz Ahmed <[EMAIL PROTECTED]> Cc: [email protected] Sent: Wednesday, July 11, 2007 2:14:34 PM Subject: Re: Davinci SD/MMC FAT corruption Hi Sarfraz, Are you sure your EDMA part has no Cache issues? Check out this thread: http://linux.omap.com/pipermail/linux-omap-open-source/2005-June/004349.html BR, Ivan Sarfraz Ahmed wrote: > Hi, > I am writting the driver for SD/MMC from scratch. I have been > able to run and test the driver using EDMA based reads and writes > but when I use CPU based read/write (Interrupt and polling) , > reading data works fine but writing something e.g. create > directory, file write, delete operations etc. causes FAT corruption. The > file system is FAT32 and I have tested with MMC and SD cards and > found same problem with both types of cards. I have also varified procedures > for CPU > based reading and writing from "sprue30b.pdf" document. I am using > Davinci DM6446 EVM. > > can anybody help me out? > > > regards, > Sarfraz > > > > ____________________________________________________________________________________ > Need a vacation? Get great deals > to amazing places on Yahoo! Travel. > http://travel.yahoo.com/ > _______________________________________________ > Davinci-linux-open-source mailing list > [email protected] > http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source > ____________________________________________________________________________________ Take the Internet to Go: Yahoo!Go puts the Internet in your pocket: mail, news, photos & more. http://mobile.yahoo.com/go?refer=1GNXIC _______________________________________________ Davinci-linux-open-source mailing list [email protected] http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
