>
>
>> -----Original Message-----
>> From:
linux-mmc-owner@vger.kernel.org
>> [mailto:linux-mmc-owner@vger.kernel.org] On Behalf Of Chuanxiao Dong
>> Sent: Wednesday, December 01, 2010 8:49 PM
>> To:
linux-mmc@vger.kernel.org
>> Cc: linux-kernel@vger.kernel.org; cjb@laptop.org; arjan@linux.intel.com;
>> alan@linux.intel.com;
akpm@linux-foundation.org
>> Subject: [PATCH v4 0/4]implement eMMC4.4 standard HW reset feature
>>
>> Hi,
>> These are the version 4 patches to implement eMMC4.4 HW reset
>> feature. Host controller can use this feature by trigger RST_n signal.
>> To enable this, byte 162 of EXT_CSD register should be set.
>> HW reset is implemented in mmc core layer and sdhci host layer, and it
>> will be used after each reading/writing/erasing timeout error occures.
>>
>> change-log:
>> This version change the way to detect timeout error conditions. Added a
>> new routine mmc_handle_timeout_error to do this instead to do this in
>> mmc_wait_for_req. Each timeout read/write/erase command can use this
>> routine to do HW reset.
>>
>> patch1: enable HW reset capability if card support.
>>
>> patch2: add two new callback to implement HW reset in mmc core layer. In
>> this patch, routine mmc_handle_timeout_error was added.
>>
>> patch3: implement hardware_reset callback for sdhci host. A new callback
>> reset_emmc was defined which will be each sdhci host controller to
>> implement separately.
>>
>> patch4: did a HW reset after each read/write/erase command.
>>
>> Thanks
>> Chuanxiao
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