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Compact Flash problem

inchul lee
Intellectual 675 points

Hi everyone,

We are using DM6446 evm board and testing CF. But CF isn't work well. The following is logs.

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Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 50MHz system bus speed for PIO modes; override with idebus=xx
MUX: initialized HDIREN
MUX: initialized ATAEN
    ide0: MMIO-DMA , BIOS settings: hda:pio, hdb:pio
hda: SanDisk SDCFX-016G, CFA DISK drive
hda: drive side 80-wire cable detection failed, limiting max speed to UDMA33
ide0 at 0xfec661f0-0xfec661f7,0xfec663f6 on irq 22
hda: max request size: 512KiB
hda: 31277232 sectors (16013 MB) w/1KiB Cache, CHS=31029/255/63, UDMA(33)
 hda:<4>hda: dma_timer_expiry: dma status == 0x21
hda: DMA timeout error
hda: dma timeout error: status=0x58 { DriveReady SeekComplete DataRequest }
ide: failed opcode was: unknown
hda: status timeout: status=0xd0 { Busy }
ide: failed opcode was: unknown
hda: drive not ready for command
ide0: reset timed-out, status=0x80
hda: status timeout: status=0x80 { Busy }
ide: failed opcode was: unknown
hda: drive not ready for command
ide0: reset timed-out, status=0x80
end_request: I/O error, dev hda, sector 0
Buffer I/O error on device hda, logical block 0
end_request: I/O error, dev hda, sector 0
Buffer I/O error on device hda, logical block 0
 unable to read partition table

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We have test  two kinds of CF which are LEXAR Media 80x (2GB) and Sandisk Extreme 60MS/x UDMA (16GB). Specially, Sandisks(2EA) are new. CFs tested are same result. But CFs is worked well on Windows OS. 

After boot, we have found /dev/hda such as the following.

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root@192.168.0.243:~# ls -al /dev/hda
lrwxrwxrwx 1 root root 32 Feb  1 12:09 /dev/hda -> ide/host0/bus0/target0/lun0/disc

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But. we can't format or mount. If we try format, error is prompted such as the following.

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root@192.168.0.243:~# mkfs.ext2 /dev/hda

/dev/hda entire device, just not one partition

......

end_request: I/O error, dev hda, sector xxxxxxxx

......

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We have searched google to find out reason. But we can't know about it very well. We  guess that this is kernel problem or filesystem proble. Would you give me some information to solve it?

Thank you and BR.

Lee.

  • 0
    Intellectual 675 points

    Hi everyone,

    We have a CF problem. We cannot understand using CF. Because we have tested 2 kinds of CF, moreover two of among CFs are new.

    Maybe, if someone had tested CF, would you give me some informations such as brand, size and so on?

    Thank you and BR.

    Lee.

  • 0 in reply to inchul lee
    Intellectual 675 points

    We have tested CF successfully by modifying device driver source code. But it is possible to use CF as just PIO mode on DVEVM. We think DVEVM doesn't support (U)DMA mode from a schematic point of view. If we modify schematic  for (U)DMA  such as adding DMARQ signal and so on for CF, is it possible to use (U)DMA mode for CF?

    Thank you and BR.

    Lee.