u-boot 2015.4 & 2015.10 can't determine partition table on samsung emmc (error -19)

[Eugene Kruglikov]

Hello.
I've got the trouble with u-boot and samsung emmc: partition table can't be
determined.

U-Boot > mmc dev 2
===> test_block_type error 1: (buffer[DOS_PART_MAGIC_OFFSET + 0] != 0x55)
|| (buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa)
     bad MBR sector signature: 0x9966
===> test_part_dos error: test_block_type(buffer) != DOS_MBR
switch to partitions #0, OK
mmc2(part 0) is current device

CMD_TRACE:
...
CMD_SEND:8
                ARG                      0x000001AA
                RET: -19 , 0xffffffed
                MMC_RSP_R1,5,6,7         0x2FF67610
CMD_SEND:55
                ARG                      0x00000000
                RET: -19 , 0xffffffed
                MMC_RSP_R1,5,6,7         0x2FF67610
...
CMD_SEND:8
                ARG                      0x00000000
                RET: -19 , 0xffffffed
                MMC_RSP_R1,5,6,7         0x00000900
...

U-Boot > mmc info
Device: FSL_SDHC
Manufacturer ID: 90
OEM: 14a
Name: H8G1e
Tran Speed: 52000000
Rd Block Len: 512
MMC version 5.0
High Capacity: Yes
Capacity: 7.3 GiB
Bus Width: 1-bit
Erase Group Size: 512 KiB
HC WP Group Size: 8 MiB
User Capacity: 7.3 GiB WRREL
Boot Capacity: 4 MiB ENH
RPMB Capacity: 512 KiB ENH

------------------------------------------

In same time Linux kernel works fine with that emmc:

# fdisk -l /dev/mmcblk3
Disk /dev/mmcblk3: 7.3 GiB, 7818182656 bytes, 15269888 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x3f1bef1e
Device         Boot Start    End Sectors Size Id Type
/dev/mmcblk3p1       2048 133119  131072  64M 83 Linux

------------------------------------------

Does anyone have any idea?
What is error code -19 ?
Thanks!

-- 

Regards,
Eugene Kruglikov
DMT TRADING
220020, Belarus, Minsk
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