Dear all,
I'm facing this unique problem during emmc write operation. I'm using a
Toshiba emmc device on Sabre AI board and linux kernel version 3.0.35.
The write operation is successful when i disable multi-block read/write.
But when multi block read/write is enabled, the writes fail for data of size
above 12KBytes. Please find the logs below for your reference. Any data
write upto 12KB, there is no problem. The error message is a data crc error
which i'm unable to figure why it is occuring.
===========================================================================
Data size <= 12KB - SUCCESS
-------------------
===========================================================================
root@freescale ~$ dd if=/file of=/dev/mmcblk0 bs=1024 count=12
mmc0: starting CMD18 arg 00000000 flags 000000b5
mmc0: blksz 512 blocks 8 flags 00000200 tsac 50 ms nsac 0
mmc0: CMD12 arg 00000000 flags 0000049d
===========host flags 0x5
=============> flags 0x1a, cmd 23
--------------- Not ACMD23
data Block size 0 512
Block count 8
Block size 29184
Block size 7
=========> transfer_ mode 0x33
=============> flags 0x3a, cmd 18
intmask 0xa
Address after failure 0x74f80000
mmc0: starting CMD18 arg 00000008 flags 000000b5
mmc0: blksz 512 blocks 8 flags 00000200 tsac 50 ms nsac 0
mmc0: CMD12 arg 00000000 flags 0000049d
===========host flags 0x5
=============> flags 0x1a, cmd 23
--------------- Not ACMD23
data Block size 0 512
Block count 8
Block size 29184
Block size 7
=========> transfer_ mode 0x33
=============> flags 0x3a, cmd 18
intmask 0xa
Address after failure 0x74f80000
mmc0: starting CMD18 arg 00000010 flags 000000b5
mmc0: blksz 512 blocks 8 flags 00000200 tsac 50 ms nsac 0
mmc0: CMD12 arg 00000000 flags 0000049d
===========host flags 0x5
=============> flags 0x1a, cmd 23
--------------- Not ACMD23
data Block size 0 512
Block count 8
Block size 29184
Block size 7
=========> transfer_ mode 0x33
=============> flags 0x3a, cmd 18
intmask 0xa
Address after failure 0x74f80000
mmc0: starting CMD25 arg 00000000 flags 000000b5
mmc0: blksz 512 blocks 24 flags 00000100 tsac 800 ms nsac 0
mmc0: CMD12 arg 00000000 flags 0000049d
===========host flags 0x5
=============> flags 0x1a, cmd 23
--------------- Not ACMD23
data Block size 0 512
Block count 24
Block size 29184
Block size 7
=========> transfer_ mode 0x23
=============> flags 0x3a, cmd 25
intmask 0x8
Address after failure 0x74f80000
intmask 0x2
Address after failure 0x74f80000
mmc0: starting CMD13 arg 00010000 flags 00000195
===========host flags 0x5
--------------- ACMD23
=============> flags 0x1a, cmd 13
12+0 records in
12+0 records out
12288 bytes (12.0KB) copied, 0.178464 seconds, 67.2KB/s
============================================================================
Data size > 12KB - FAIL
-----------------
============================================================================
root@freescale ~$ dd if=/file of=/dev/mmcblk0 bs=1024 count=15
mmc0: starting CMD18 arg 00000000 flags 000000b5
mmc0: blksz 512 blocks 8 flags 00000200 tsac 50 ms nsac 0
mmc0: CMD12 arg 00000000 flags 0000049d
===========host flags 0x5
=============> flags 0x1a, cmd 23
--------------- Not ACMD23
data Block size 0 512
Block count 8
Block size 29184
Block size 7
=========> transfer_ mode 0x33
=============> flags 0x3a, cmd 18
intmask 0xa
Address after failure 0x74f00000
mmc0: starting CMD18 arg 00000008 flags 000000b5
mmc0: blksz 512 blocks 8 flags 00000200 tsac 50 ms nsac 0
mmc0: CMD12 arg 00000000 flags 0000049d
===========host flags 0x5
=============> flags 0x1a, cmd 23
--------------- Not ACMD23
data Block size 0 512
Block count 8
Block size 29184
Block size 7
=========> transfer_ mode 0x33
=============> flags 0x3a, cmd 18
intmask 0xa
Address after failure 0x74f00000
mmc0: starting CMD18 arg 00000010 flags 000000b5
mmc0: blksz 512 blocks 8 flags 00000200 tsac 50 ms nsac 0
mmc0: CMD12 arg 00000000 flags 0000049d
===========host flags 0x5
=============> flags 0x1a, cmd 23
--------------- Not ACMD23
data Block size 0 512
Block count 8
Block size 29184
Block size 7
=========> transfer_ mode 0x33
=============> flags 0x3a, cmd 18
intmask 0xa
Address after failure 0x74f00000
mmc0: starting CMD18 arg 00000018 flags 000000b5
mmc0: blksz 512 blocks 8 flags 00000200 tsac 50 ms nsac 0
mmc0: CMD12 arg 00000000 flags 0000049d
===========host flags 0x5
=============> flags 0x1a, cmd 23
--------------- Not ACMD23
data Block size 0 512
Block count 8
Block size 29184
Block size 7
=========> transfer_ mode 0x33
=============> flags 0x3a, cmd 18
intmask 0xa
Address after failure 0x74f00000
mmc0: starting CMD25 arg 00000000 flags 000000b5
mmc0: blksz 512 blocks 32 flags 00000100 tsac 800 ms nsac 0
mmc0: CMD12 arg 00000000 flags 0000049d
===========host flags 0x5
=============> flags 0x1a, cmd 23
--------------- Not ACMD23
data Block size 0 512
Block count 32
Block size 29184
Block size 7
=========> transfer_ mode 0x23
=============> flags 0x3a, cmd 25
intmask 0x200002
============> need to send cmd12
=============> flags 0x1b, cmd 12
Address after failure 0x0
mmc0: starting CMD13 arg 00010000 flags 00000195
===========host flags 0x5
--------------- ACMD23
=============> flags 0x1a, cmd 13
mmcblk0: error -84 transferring data, sector 0, nr 32, cmd response 0x900,
card status 0xc00
end_request: I/O error, dev mmcblk0, sector 0
Buffer I/O error on device mmcblk0, logical block 0
lost page write due to I/O error on mmcblk0
end_request: I/O error, dev mmcblk0, sector 8
Buffer I/O error on device mmcblk0, logical block 1
lost page write due to I/O error on mmcblk0
end_request: I/O error, dev mmcblk0, sector 16
Buffer I/O error on device mmcblk0, logical block 2
lost page write due to I/O error on mmcblk0
end_request: I/O error, dev mmcblk0, sector 24
Buffer I/O error on device mmcblk0, logical block 3
lost page write due to I/O error on mmcblk0
15+0 records in
15+0 records out
15360 bytes (15.0KB) copied, 0.277967 seconds, 54.0KB/s
Please provide your valuable inputs for the same.
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