topic iMX6UL mmc0 in i.MX Processors https://community.nxp.com/t5/i-MX-Processors/iMX6UL-mmc0/m-p/568692#M87464 <HTML><HEAD></HEAD><BODY><P>Hi everyone,</P><P>Currently we are developing small module with iMX6 UltraLite and we have found some issues on USDHC1.</P><P>We also have EVK board and it looks like similar issue. </P><P>When we try reading in uboot:</P><P><STRONG>&nbsp;&nbsp;&nbsp;&nbsp; mmc read 85000000 0 1</STRONG></P><P>&nbsp;&nbsp;&nbsp;&nbsp; than it is ussualy OK</P><P>When we try more blocks</P><P><STRONG>&nbsp;&nbsp;&nbsp;&nbsp; mmc read 85000000 0 100</STRONG></P><P>&nbsp;&nbsp;&nbsp;&nbsp; it ends with ERROR<STRONG><BR /></STRONG>When we try this even more borad gets stucked in uknown state</P><P>Voltage levels on MMC interface drops down to around 1.6 to 1.9V for supply voltage 3.3V<STRONG><BR /> </STRONG></P><P>Normally this would not be a big problem because we use NAND flash for normal boot. Issue is that it is not working either in Linux (interface is planned for SDIO WiFi)</P><P>We get <STRONG>mmc0: Timeout waiting for hardware interrupt.</STRONG> and <STRONG>error -110</STRONG></P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>We use customized uboot and kernel forked from officalgit. Our config is attached. Pinconf in uboot and in DTS is same as on EVK board.</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>USDHC2 is not available on our board but it looks, that is working correctly on EVK.</P><P><STRONG>Original Attachment has been moved to: <A _jive_internal="true" href="https://community.nxp.com/docs/DOC-336838">kernel.cfg.zip</A></STRONG></P></BODY></HTML> Wed, 13 Jul 2016 13:33:26 GMT jirinovotnyle 2016-07-13T13:33:26Z iMX6UL mmc0 https://community.nxp.com/t5/i-MX-Processors/iMX6UL-mmc0/m-p/568692#M87464 <HTML><HEAD></HEAD><BODY><P>Hi everyone,</P><P>Currently we are developing small module with iMX6 UltraLite and we have found some issues on USDHC1.</P><P>We also have EVK board and it looks like similar issue. </P><P>When we try reading in uboot:</P><P><STRONG>&nbsp;&nbsp;&nbsp;&nbsp; mmc read 85000000 0 1</STRONG></P><P>&nbsp;&nbsp;&nbsp;&nbsp; than it is ussualy OK</P><P>When we try more blocks</P><P><STRONG>&nbsp;&nbsp;&nbsp;&nbsp; mmc read 85000000 0 100</STRONG></P><P>&nbsp;&nbsp;&nbsp;&nbsp; it ends with ERROR<STRONG><BR /></STRONG>When we try this even more borad gets stucked in uknown state</P><P>Voltage levels on MMC interface drops down to around 1.6 to 1.9V for supply voltage 3.3V<STRONG><BR /> </STRONG></P><P>Normally this would not be a big problem because we use NAND flash for normal boot. Issue is that it is not working either in Linux (interface is planned for SDIO WiFi)</P><P>We get <STRONG>mmc0: Timeout waiting for hardware interrupt.</STRONG> and <STRONG>error -110</STRONG></P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>We use customized uboot and kernel forked from officalgit. Our config is attached. Pinconf in uboot and in DTS is same as on EVK board.</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>USDHC2 is not available on our board but it looks, that is working correctly on EVK.</P><P><STRONG>Original Attachment has been moved to: <A _jive_internal="true" href="https://community.nxp.com/docs/DOC-336838">kernel.cfg.zip</A></STRONG></P></BODY></HTML> Wed, 13 Jul 2016 13:33:26 GMT https://community.nxp.com/t5/i-MX-Processors/iMX6UL-mmc0/m-p/568692#M87464 jirinovotnyle 2016-07-13T13:33:26Z