Date: Tue, 13 May 2014 10:17:41 -0400 From: Winston Smith <smith.winston.101@gmail.com> To: Ian Lepore <ian@freebsd.org> Cc: freebsd-arm <freebsd-arm@freebsd.org> Subject: Re: Patch to make BBB properly boot from eMMC every time Message-ID: <CADH-AwGftVJCi9NrAfQs6CYNifM04DZu9rtVF4k6Cd6irFk7fg@mail.gmail.com> In-Reply-To: <1399987808.56626.2.camel@revolution.hippie.lan> References: <5371E1F3.6080002@hot.ee> <1399987808.56626.2.camel@revolution.hippie.lan>
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On Tue, May 13, 2014 at 9:30 AM, Ian Lepore <ian@freebsd.org> wrote: > Confused about the cause of the results, yes. I think the printf I had > you add to help me figure out the problem just changed the timing of the > retry to make it work on the second try, but I have no idea why. > > Does anybody else with a BBB see the device randomly boot up as 1 or 4 > or 8 bits, changing from one boot to the next? The bits are reported in > the mmcsd0 line: > > mmcsd0: 8GB <SDHC SA08G 0.4 SN 2630755555 MFG 10/2009 by 2 TM> at mmc0 > 50.0MHz/4bit/65535-block > > That's from a wandboard, but a BBB eMMC should always be 8 bits. BBB rev A6A shows 8-bits (for the eMMC): mmcsd1: 2GB <MMC MMC02G 3.10 SN 244024444 MFG 08/1997 by 254 0x004e> at mmc1 48.0MHz/8bit/65535-block But shows 4-bits for the SD card: mmcsd0: 4GB <SDHC SA04G 0.4 SN 2617266666 MFG 05/2010 by 2 TM> at mmc0 48.0MHz/4bit/65535-block
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