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IMX28 eMMC flash access

Question asked by Hariharan Veerappan on Nov 19, 2015
Latest reply on Nov 20, 2015 by igorpadykov

Hi,

 

We have a custom board developed with eMMC is interfaced with IMX28 ( SSP0 ). Pin mux details are as given below,

static struct pin_desc mmc0_pins_desc[] = {

        { PINID_SSP0_DATA0, PIN_FUN1, PAD_8MA, PAD_3V3, 1 },

        { PINID_SSP0_DATA1, PIN_FUN1, PAD_8MA, PAD_3V3, 1 },

        { PINID_SSP0_DATA2, PIN_FUN1, PAD_8MA, PAD_3V3, 1 },

        { PINID_SSP0_DATA3, PIN_FUN1, PAD_8MA, PAD_3V3, 1 },

        { PINID_SSP0_DATA4, PIN_FUN1, PAD_8MA, PAD_3V3, 1 },

        { PINID_SSP0_DATA5, PIN_FUN1, PAD_8MA, PAD_3V3, 1 },

        { PINID_SSP0_DATA6, PIN_FUN1, PAD_8MA, PAD_3V3, 1 },

        { PINID_SSP0_DATA7, PIN_FUN1, PAD_8MA, PAD_3V3, 1 },

        { PINID_SSP0_CMD, PIN_FUN1, PAD_8MA, PAD_3V3, 1 },

        { PINID_SSP0_DETECT, PIN_FUN1, PAD_8MA, PAD_3V3, 1 },

        { PINID_SSP0_SCK, PIN_FUN1, PAD_8MA, PAD_3V3, 1 },

};

 

When we try to access emmc from uboot using mmcinfo command, we are getting the following error.

 

MX28 U-Boot > mmcinfo

Card did not respond to voltage select!

MMC card init failed!

MX28 U-Boot > mmc rescan 0

Card did not respond to voltage select!

MX28 U-Boot >

 

Our environment informations are,

u-boot-2009.08 from IMX28 Ltib.

 

Please share your inputs whether eMMC is supported in the same and patch to make access eMMC flash using IMX28 SSP0.

 

Thanks,

Hariharan.V.

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