From: Eric Nelson <eric@nelint.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] mmc erase fails from U-Boot command line
Date: Fri, 4 Dec 2015 09:08:27 -0700 [thread overview]
Message-ID: <5661BA7B.8030904@nelint.com> (raw)
In-Reply-To: <CAOf5uw=UhCKA3yzFNC6JQvN-OzbZ3mDWS+KSRUab9aef-oeL8w@mail.gmail.com>
Hi Michael,
On 12/02/2015 01:00 PM, Michael Trimarchi wrote:
> Hi
>
> On Wed, Dec 2, 2015 at 8:54 PM, Fabio Estevam <festevam@gmail.com> wrote:
>> Hi Michael,
>>
>> On Wed, Dec 2, 2015 at 5:37 PM, Michael Trimarchi
>> <michael@amarulasolutions.com> wrote:
>>
>>> Can you print the sysctl & 0xF? I want to check if this workaround is
>>> really applied
>>
>> In my testing I see the error with or without the ENGcm03648 workaround.
>>
>
> Well the workaround works if the sysctl is 0xf on the last bits,
> because it needs the
> clocks enable according to the original description.
>
> http://git.freescale.com/git/cgit.cgi/imx/uboot-imx.git/commit/drivers/mmc/imx_esdhc.c?h=imx_v2009.08_12.01.01&id=e436525a70fe47623d346bc7d9f08f12ff8ad787
>
> So if you hit this timeout without having this set, I don't think it can work
>
I think you're onto something.
According to the i.MX35 reference manual, which I think was the origin
of this patch, the low four bits of the SYSCTL register of the SDHC5
3 - SDCLKEN
2 - PEREN
1 - HCKEN
0 - IPGEN
See page 603 of
http://cache.freescale.com/files/dsp/doc/ref_manual/IMX35RM.pdf
But in the i.MX6 reference manual, the low four bits are reserved and
say "Always write as 1".
See pages 5679-5680 of
http://cache.freescale.com/files/32bit/doc/ref_manual/IMX6DQRM.pdf
It appears that when this patch was ported from the Freescale version,
the test for "is_usdhc" was lost.
http://git.denx.de/?p=u-boot.git;a=commitdiff;h=7a5b80297bc6cef0c10e5f57ac0450678dc7bc5e
next prev parent reply other threads:[~2015-12-04 16:08 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-16 11:46 [U-Boot] mmc erase fails from U-Boot command line Cliff Brust
2015-10-19 11:06 ` Hector Palacios
2015-11-12 20:56 ` Fabio Estevam
2015-11-13 12:26 ` Palacios, Hector
2015-11-13 14:37 ` Fabio Estevam
2015-11-16 15:23 ` Fabio Estevam
2015-11-16 15:30 ` Fabio Estevam
2015-12-01 19:05 ` Eric Nelson
2015-12-02 17:23 ` Fabio Estevam
2015-12-02 18:47 ` Eric Nelson
2015-12-02 18:52 ` Fabio Estevam
2015-12-02 19:28 ` Eric Nelson
2015-12-02 19:53 ` Fabio Estevam
2015-12-04 16:35 ` Eric Nelson
2015-12-04 16:37 ` Fabio Estevam
2015-12-04 22:42 ` Eric Nelson
2015-12-05 0:19 ` Fabio Estevam
2015-12-07 0:21 ` Fabio Estevam
2015-12-07 14:36 ` Eric Nelson
2015-12-02 19:37 ` Michael Trimarchi
2015-12-02 19:54 ` Fabio Estevam
2015-12-02 20:00 ` Michael Trimarchi
2015-12-04 16:08 ` Eric Nelson [this message]
2015-12-04 16:50 ` Eric Nelson
2015-12-04 17:06 ` Michael Trimarchi
2015-12-07 14:50 ` [U-Boot] [PATCH] mmc: update MMC_ERASE argument to match Linux kernel Eric Nelson
2015-12-09 10:55 ` Hector Palacios
2015-12-22 9:55 ` Fabio Estevam
2016-01-04 22:23 ` [U-Boot] " Tom Rini
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