lkml.org 
[lkml]   [2010]   [Dec]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
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


\
 
 \ /
  Last update: 2010-12-01 13:53    [W:0.059 / U:0.868 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site