uboot emmc启动,但是无法识别EMMC,无法烧写uboot和保存uboor信息

以下为uboot的启动信息:
System startup

Uncompress Ok!

U-Boot 2016.11 (Jul 12 2018 - 19:26:53 +0800)hi3559av100

Relocation Offset is: 176ef000
Relocating to 5feef000, new gd at 5fe4ee00, sp at 5fe4edf0
SPI Nor: Boot Media isn’t SPI Nor
NAND: Check Flash Memory Controller v100 … Found
SPI Nand ID Table Version 2.7
Warning: Wait SPI nand ready timeout, status: 0xff
Cannot found a valid SPI Nand Device
0 MiB
MMC:
MMC Device 0 not found
*** Warning - No MMC card found, using default environment

In: serial
Out: serial
Err: serial
Net: gmac0
Error: gmac0 address not set.
, gmac1
Error: gmac1 address not set.

Hit any key to stop autoboot: 0

启动方式为:
hisilicon # getinfo bootmode
emmc

但是烧不进去,也保存不了设置信息:
hisilicon # saveenv
Saving Environment to eMMC Flash…
MMC Device 0 not found
!No MMC card found

这可如何是好。

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