Anton Vorontsov wrote: > On Fri, May 30, 2008 at 08:00:32PM +0200, Wolfgang Grandegger wrote: > [...] >> Fix that, but I can still not access the device properly. I'm a bit >> puzzled because it uses a different algorithm to access the device. >> While my and the Linux fsl_upm driver uses NAND_ALE, NAND_CLE and >> friends to manage the access via hwcontrol callback, the fsl_upm driver >> of U-Boot uses the cmdfunc callback doing different things. > > I wonder if your NAND chip is a large page one? Because currently > fsl_upm_nand hardcodes OOB stuff (bad thing, but with old mtd subsystem > I didn't find better way ;-).
On my TQM8548 there is a Micron MT29F8G08FABWP, page size 2048 + 64 bytes, block size 128K + 4K bytes. > As for u-boot and linux doing different things... with this patch > u-boot and linux are identical: > > http://www.denx.de/cgi-bin/gitweb.cgi?p=u-boot/u-boot-nand-flash.git;a=commitdiff;h=dffa9a8b31b2c21fd3a72ba1f58dd04911b95b6f > > This is in U-Boot's mtd-2.6.22.1 branch though. :-/ Your approach with hwctl > seem to be more universal (for old mtd subsystem), since it doesn't duplicate > MTD cmdfunc, thus should work for all NAND chips... A closer look to the code confirms that. > Could you prepare a patch that replacing fsl_upm_nand.c's current logic > with yours (that should work for your NAND chip), and I'll test it > on MPC8360E-RDK? The attached preliminary patch works for me. Compared to my specific driver, it saves start_pattern and end_pattern calls :-). It now also supports a bus width of 8, 16 and 32 bits and width is now in bits like in the Linux driver. I'm going to prepare a proper patch series beginning of next week. Wolfgang. ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ U-Boot-Users mailing list U-Boot-Users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/u-boot-users
