From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Nelson Date: Wed, 2 Dec 2015 11:47:47 -0700 Subject: [U-Boot] mmc erase fails from U-Boot command line In-Reply-To: References: <5620E3A7.7040909@defengcorp.com> <5624CEC5.8040901@digi.com> <52F917CEA1B9C64C94833D53889D478C269236@dor-sms-xch01.digi.com> <565DEF80.90204@nelint.com> Message-ID: <565F3CD3.1010100@nelint.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Hi Fabio, On 12/02/2015 10:23 AM, Fabio Estevam wrote: > Hi Eric, > > On Tue, Dec 1, 2015 at 5:05 PM, Eric Nelson wrote: > >> I've also recently seen this on two different custom boards. Both are >> running i.MX6Q TO1.2 and both are using eMMC from Micron. > > One colleague of mine tested eMMC erasure on a mx6qsabresd revC5 board > with a eMMC from Micron and it worked fine. > > So far I see: > > revB and revC5: works > revC2 and revC4: don't work > We're seeing this pretty intermittently and only with certain devices from the same batch, so I'm not sure I'd conclude that the problem won't happen on revB or revC5. >> >> The code which is generating the error message: >> >> http://git.denx.de/?p=u-boot.git;a=blob;f=drivers/mmc/fsl_esdhc.c;h=c5054d66bdcda029f0485958c87bd5154ccee591;hb=HEAD#l390 >> >> Seems to refer to an errata for the i.MX35 (ENGcm03648): >> http://cache.freescale.com/files/dsp/doc/errata/IMX35CE.pdf >> >> I don't see any reference to the errata in the i.MX6 docs. > > This piece of code came from: > 7a5b80297bc6cef ("mmc: fsl_esdhc: Poll until card is not busy anymore") > > Yes, ENGcm03648 is not listed in mx6 errata document. > >> Ignoring the error (removing the return statement) seems to leave things >> in a workable state, so I suspect the problem isn't with an insufficient >> timeout. > > May I see your change, please? > Sure. It's a hack, but shows where we're hitting the problem (with the stop command). We haven't been using the "mmc erase" command, but see this when using ums to program eMMC. Regards, Eric -------------- next part -------------- A non-text attachment was scrubbed... Name: e647278657e32f74833eadc5f2cbe4d121c22842.patch Type: text/x-diff Size: 1305 bytes Desc: not available URL: