SD卡驱动移植问题

a62582480

我现在在做SD卡的驱动移植，SD卡已经识别了，但是为什么不能分区呢  我输入  fdisk /dev/mmclbk0  就提示错误，中间出现的DAT[TIMEOUT] 是什么原因。。
Freeing init memory: 132K
s3c2440-sdi s3c2440-sdi: running at 0kHz (requested: 0kHz).
s3c2440-sdi s3c2440-sdi: running at 195kHz (requested: 195kHz).
s3c2440-sdi s3c2440-sdi: running at 195kHz (requested: 195kHz).
s3c2440-sdi s3c2440-sdi: running at 195kHz (requested: 195kHz).
s3c2440-sdi s3c2440-sdi: running at 195kHz (requested: 195kHz).
s3c2440-sdi s3c2440-sdi: running at 195kHz (requested: 195kHz).
s3c2440-sdi s3c2440-sdi: running at 195kHz (requested: 195kHz).
s3c2440-sdi s3c2440-sdi: running at 195kHz (requested: 195kHz).
s3c2440-sdi s3c2440-sdi: running at 24978kHz (requested: 25000kHz).
s3c2440-sdi s3c2440-sdi: running at 24978kHz (requested: 25000kHz).
mmcblk0: mmc0:cdde SD02G 1921024KiB
mmcblk0:<7>mmc0: starting CMD18 arg 00000000 flags 00000035
s3c2440-sdi s3c2440-sdi: CMD[OK] #23 op:READ_MULTIPLE_BLOCK(1 arg:0x00000000 flags:0x0835 retries:0 R0:0x00000900
s3c2440-sdi s3c2440-sdi: DAT[TIMEOUT] #2 bsize:512 blocks:8 bytes:4096 DCNT:0x00000000
mmcblk0: error 1 transferring data
end_request: I/O error, dev mmcblk0, sector 0
Buffer I/O error on device mmcblk0, logical block 0
# fdisk /dev/mmcblk0
s3c2440-sdi s3c2440-sdi: CMD[OK] #27 op:READ_MULTIPLE_BLOCK(1 arg:0x00000000 flags:0x0835 retries:0 R0:0x00000900
s3c2440-sdi s3c2440-sdi: DAT[TIMEOUT] #4 bsize:512 blocks:32 bytes:16384 DCNT:0x00000000
mmcblk0: error 1 transferring data
end_request: I/O error, dev mmcblk0, sector 0
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s3c2440-sdi s3c2440-sdi: CMD[OK] #29 op:READ_MULTIPLE_BLOCK(1 arg:0x00000000 flags:0x0835 retries:0 R0:0x00000900
s3c2440-sdi s3c2440-sdi: DAT[TIMEOUT] #5 bsize:512 blocks:8 bytes:4096 DCNT:0x00000000
mmcblk0: error 1 transferring data
end_request: I/O error, dev mmcblk0, sector 0
Buffer I/O error on device mmcblk0, logical block 0
fdisk: cannot read from /dev/mmcblk0

emmoblin

s3c2440-sdi s3c2440-sdi: DAT[TIMEOUT] #2 bsize:512 blocks:8 bytes:4096 DCNT:0x00000000

还是跟踪一下把。
可能是按区读写的驱动还是有问题。