i.MX ProcessorsのトピックRe: i.MX6D custom board boot from eMMC failes

i.MX6D custom board boot from eMMC failes

saurabh206 — Wed, 15 Jul 2015 04:17:24 GMT

We are able to do firmware update using mfgtool on custom board.

We are getting error like "Block device MMC2 not supported".

booti mmc2

MMC detect: 1

CMD_SEND:0

ARG 0x00000000

MMC_RSP_NONE

CMD_SEND:8

ARG 0x000001AA

MMC_RSP_R1,5,6,7 0x00000000

CMD_SEND:55

ARG 0x00000000

MMC_RSP_R1,5,6,7 0x00000000

** Block device MMC 2 not supported

Thanks

Saurabh

Re: i.MX6D custom board boot from eMMC failes

igorpadykov — Wed, 15 Jul 2015 06:23:01 GMT

Hi Saurabh

seems card does not respond to reset (CMD_SEND:0),

except that one uses wrong mmc number,

smth basically wrong with mmc, please check power supplies

and signals with oscilloscope, one can do that with SDK test usdhc.c, running it with jtag

i.MX 6Series Platform SDK

for mmc connections one can look at Sabre schematic

i.MX6_SABRE_SDP_DESIGNFILES

Best regards

igor

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Re: i.MX6D custom board boot from eMMC failes

saurabh206 — Thu, 16 Jul 2015 09:56:24 GMT

Hi igor,

We can detect MMC when we boot from SD Card.

So it seems that power supply should be proper.

But u-boot code fails to detect eMMC.

is there any update available for eMMC in u-boot?

Thanks

Saurabh

Re: i.MX6D custom board boot from eMMC failes

saurabh206 — Thu, 16 Jul 2015 11:46:09 GMT

Hi igor,

Finally I am able to get eMMC working.

We need to do GPIO correction in u-boot code.

Thanks for your support.

Saurabh