i.mx6Q-SDB eMMC启动问题

hanyong-172699 · 发表于 2015-1-4 21:46:10

i.mx6Q-SDB板，通过工具Mfgtools-Rel-4.1.0_130816_MX6Q_UPDATER，uboot kernel可以烧写到SD卡中可以正常启动，但烧写eMMC时，烧写过程正确，完成后启动系统串口没有任何打印信息。具体过程如下：

1，MFGtool版本为4.1.0_130816

2，ucl2.xml烧写eMMC的代码如下，没做任何改动。
<LIST name="SabreSD-eMMC" desc="Choose eMMC Linux as media">
<CMD state="BootStrap" type="boot" body="BootStrap" file ="u-boot-mx6q-sabresd.bin" >Loading U-boot</CMD>
<CMD state="BootStrap" type="load" file="uImage" address="0x10800000"
      loadSection="OTH" setSection="OTH" HasFlashHeader="FALSE" >Loading Kernel.</CMD>
<CMD state="BootStrap" type="load" file="initramfs.cpio.gz.uboot" address="0x10C00000"
      loadSection="OTH" setSection="OTH" HasFlashHeader="FALSE" >Loading Initramfs.</CMD>
<CMD state="BootStrap" type="jump" > Jumping to OS image. </CMD>

      <CMD state="Updater" type="push" body="$ ls /dev/*"/>
      <CMD state="Updater" type="push" body="$ dd if=/dev/zero of=/dev/mmcblk0 bs=512 seek=1536 count=16">clean up u-boot parameter</CMD>

      <CMD state="Updater" type="push" body="$ echo 0 > /sys/block/mmcblk0boot0/force_ro">access boot partition 1</CMD>
      <CMD state="Updater" type="push" body="send" file="files/u-boot-mx6q-sabresd.bin">Sending U-Boot</CMD>
      <CMD state="Updater" type="push" body="$ dd if=$FILE of=/dev/mmcblk0boot0 bs=512 seek=2 skip=2">write U-Boot to sd card</CMD>
      <CMD state="Updater" type="push" body="$ echo 1 > /sys/block/mmcblk0boot0/force_ro"> re-enable read-only access </CMD>
      <CMD state="Updater" type="push" body="$ echo 8 > /sys/devices/platform/sdhci-esdhc-imx.3/mmc_host/mmc0/mmc0:0001/boot_config">enable boot partion 1 to boot</CMD>

<CMD state="Updater" type="push" body="send" file="files/uImage">Sending kernel uImage</CMD>
<CMD state="Updater" type="push" body="$ dd if=$FILE of=/dev/mmcblk0 bs=1M seek=1 conv=fsync">write kernel image to sd card</CMD>

<CMD state="Updater" type="push" body="send" file="mksdcard.sh.tar">Sending partition shell</CMD>
<CMD state="Updater" type="push" body="$ tar xf $FILE "> Partitioning...</CMD>
<CMD state="Updater" type="push" body="$ sh mksdcard.sh /dev/mmcblk0"> Partitioning...</CMD>

<CMD state="Updater" type="push" body="$ mkfs.ext3 -j /dev/mmcblk0p1">Formatting rootfs partition</CMD>
<CMD state="Updater" type="push" body="$ mkdir -p /mnt/mmcblk0p1"/>
<CMD state="Updater" type="push" body="$ mount -t ext3 /dev/mmcblk0p1 /mnt/mmcblk0p1"/>
<CMD state="Updater" type="push" body="pipe tar -jxv -C /mnt/mmcblk0p1" file="files/rootfs.tar.bz2">Sending and writting rootfs</CMD>
<CMD state="Updater" type="push" body="frf">Finishing rootfs write</CMD>
<CMD state="Updater" type="push" body="$ umount /mnt/mmcblk0p1">Unmounting rootfs partition</CMD>
<CMD state="Updater" type="push" body="$ echo Update Complete!">Done</CMD>
</LIST>

3，烧写eMMC将cfg.ini文件改写如下，和 ucl2.xml内容相对应：
[profiles]
chip = MX6Q Linux Update

[platform]
board = SabreSD

[LIST]
name = SabrSD-eMMC

4，eMMC拨码开关设置如下：在烧写过程
eMMC拨码开关应该设置如下：（download mode）
Switch D1 D2  D3  D4 D5  D6  D7 D8
SW6 OFF OFF OFF OFF ON  ON OFF OFF
烧写完成后，断电，设置eMMC拨码开关设置如下：( emmc boot mode)
Switch D1 D2  D3  D4 D5  D6  D7 D8
SW6 ON ON OFF ON OFF ON ON OFF
给板子上电，启动。

什么原因造成的呢？难道是工具Mfgtools-Rel-4.1.0_130816_MX6Q_UPDATER的问题？

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