linux-kernel - Re: MMC block addressing mode.

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Message-ID: <fdc1864b-9d5a-25ad-5d15-dc094f1c0886@cavium.com>
Date:   Thu, 20 Apr 2017 16:28:09 -0500
From:   "Steven J. Hill" <Steven.Hill@...ium.com>
To:     David Daney <ddaney@...iumnetworks.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Jan Glauber <jan.glauber@...iumnetworks.com>
Cc:     linux-mmc <linux-mmc@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: MMC block addressing mode.

On 04/20/2017 04:24 PM, Steven J. Hill wrote:
> On 04/20/2017 12:12 PM, David Daney wrote:
>>
>> Steven and Jan:  Can we get around this requirement by:
>>
>> - Always set MIO_EMM_DMA[MULTI] = 1;  This way by SECTOR mode may be unimportant.
>>
>> - Always set MIO_EMM_DMA[SECTOR] = SUITABLE_CONSTANT.
>>
> No, this does not work. The 1.88GB card plugged into my 78xx
> board gives the output below. We cannot just blindly set the
> MULTI bit for all cards. These results are identical for all
> four combinations of SECTOR and MULTI values hardcoded.
> 
...for 3 of the 4 combinations. Obviously the correct one works.