Hello all, How about these patches? It implemented HW reset feature. When card occurred a timeout error during reading/writing/erasing, these patches will allow driver to reset eMMC card by trigger a HW reset signal. Does anyone have any comments about the implementation of these patches? Wolfram and Arnd already pointed out the unsuitable patch headers. Thanks! :) > -----Original Message----- > From: linux-mmc-owner@xxxxxxxxxxxxxxx > [mailto:linux-mmc-owner@xxxxxxxxxxxxxxx] On Behalf Of Chuanxiao Dong > Sent: Wednesday, December 01, 2010 8:49 PM > To: linux-mmc@xxxxxxxxxxxxxxx > Cc: linux-kernel@xxxxxxxxxxxxxxx; cjb@xxxxxxxxxx; arjan@xxxxxxxxxxxxxxx; > alan@xxxxxxxxxxxxxxx; akpm@xxxxxxxxxxxxxxxxxxxx > 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 > -- > To unsubscribe from this list: send the line "unsubscribe linux-mmc" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
