Can't detect uSD Card in i.MX6UL custom board

[punitkumar]

I'm working on designing an i.MX6UL custom board to which i'm using eMMC (in SD2 interfacing port) as boot device and trying to use uSD card in SD1 interface as a separate storage device. The board is working fine but i'm unable to get uSD card worked.

Need help on what I should do to get it worked.

Following image is the schematic of the sd interface. BT_CFG1_5 & BT_CFG2_3 pins shown in schematic can be ignored as they are not in use. J6 is the uSD Card holder.

Regards

Punit Kumar

[igorpadykov]

Hi Punit

this may be caused by card detection, like "cd-gpios" in imx6ul-14x14-evk.dts

please check available options in sect.32.3.3 Devicetree Binding attached Linux

Manual.

Best regards
igor
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[punitkumar]

Hi igorpadykov‌

I've changed the cd-gpio pin configuration in mfgtool dts and my yocto dts to always pull-down using iomux configuration and the image is successfully downloaded using mfgtool but when I tried internal boot, nothing happened.

I think the board detects uSD card in serial download mode because of the changes made in mfgtool dts configured the CD pin pulled-down but while booting from sd card, the dts doesn't come into picture to configure pin and that's why card is not working.

The problem in giving and external CD signal is that the pin used is not routed out in pcb.

Is there any way out in?

Regards

Punit Kumar

[igorpadykov]

Hi Punit

is it working in uboot, please check

https://community.nxp.com/thread/380527 

Best regards
igor

[punitkumar]

Hi Igor

Thanks for instant response.

The board is not booting at all and nothing coming on the terminal.

Regards

Punit Kumar

[igorpadykov]

Hi Punit

is it  booting from other media, had you run ddr test

https://community.freescale.com/docs/DOC-105652 

Best regards
igor

[punitkumar]

Hi igor

eMMC in uSDHC2 port is working fine. I am trying to run the os from uSD card in uSDHC1 port as well.

Regards

Punit Kumar

[igorpadykov]

Hi Punit

please check uSDHC1 signals with oscilloscope,

when fail attach jtag and check SRC_SBMR1 for boot settings

Best regards
igor

[punitkumar]

Hi

Thanks igorpadykov‌

I've forced assert the CD input by configuring it as a pull down internally as I've not connected it  to my uSD card holder, I think it's okey with it.

Now there is a message appearing in console "error -110 whilst initializing sdcard".

Now, what should I do?

regards
Punit Kumar