emmc is not boot and not work on sd3 in uboot,but works on sd3 in kernel

[HaohuaQIN]

Hi all，

 Emmc is not boot and work on sd3 ,and not work in uboot ,but works ok on sd3 in kernel.

I use 8G emmc SDIN8DE1-8G on SD4(USDHC3) ,8-bit mode,just like sabresd board, it works ok.

I use 8G SD-card on SD3(USDHC2), 4-bit mode,it works ok.

Now,I use 8G emmc SDIN8DE1-8G on SD3(USDHC2) ,8-bit mode.And lets SD4(USDHC3)’s pin is float.

I modify kernel,disable sd3 ‘s cd and wp,and disable down:

//imx6q_add_sdhci_usdhc_imx(3, &mx6q_sabresd_sd4_data);

Now sd3 is mmcblk0.

And I modify ucl2.xml: modify sdhci-esdhc-imx.3 to sdhci-esdhc-imx.2.

Then I can download uboot ,boot.img,and system.img to emmc by sd3, download is ok.

I set boot mode is 8bit emm on sd3,then boot system ,but it is not work. Nothing is print.

I use mfgtool download and enter uboot,

Print:

MMC:   FSL_USDHC: 0,FSL_USDHC: 1,FSL_USDHC: 2,FSL_USDHC: 3

MMC init failed

Then I use command:mmc dev 2;mmc rescan;mmcinfo

Print is below:

MX6SDL SABRESD U-Boot > mmcinfo

Device: FSL_USDHC

Manufacturer ID: 0

OEM: 0

Name: Tran Speed: 0

Rd Block Len: 0

MMC version 0.0

Clock: 400000

High Capacity: Yes

Capacity: 0 Bytes

Bus Width: 1-bit

Current Partition for boot: Not bootable

Uboot is 2009.08,kernel is 3.0.35,android is kk4.4.2.

I want to know what is the problem ?

Thanks.

[HaohuaQIN · Accepted solution]

The problem is solved ,because the emmc's cmd is not pull up.