I had the same problem. It turns the idiot hardware engineer decided he would do byte swapping in hardware without telling me. To get around it, I just made the byte swapping code a noop (no byte swaping) and it worked.
--- Gregg gnemas@gmail.com wrote:
I have a board that has a 128 MB compact flash connected to a PPC 440GP peripheral bus using True IDE mode. Up until now, I have been successfully booting using NFS, and now I am trying to get the IDE interface to work.
When I issue an IDE reset command to u-boot, the information returned is byte-swapped:
Device 0: Model: aSDnsi KDSFC-J21 8 Firm: DH X.272 Ser#: <...> Type: Removeable Hard Disk Capacity: 24576.1 MB = 24.0 GB (50331860 x 512)
Note that "aSDnsi K" is "SanDisk ". If I modify cmd_ide.c to pretend I am little endian so that the input_swap_data function is disabled (#if defined (__LITTLE_ENDIAN) version is used), I get seemingly correct results:
Device 0: Model: SanDisk SDCFJ-128 Firm: HDX 2.27 Ser#: <...> Type: Removeable Hard Disk Capacity: 122.5 MB = 0.1 GB (250880 x 512)
I am confused why I need to do this, as it seems wrong. Furthermore, although I can get the IDE information, I cannot see any partitions on the device. I created a single linux partion (type 83), but when I issue "ide part 0", I am told "IDE device 0 not available".
The CF is connected to the PPC like this:
A0,A1,A2 on the CF ==> A30, A29, A28 on 440GP D0..D15 on CF ==> D15..D0 on 440GP
I am using the following ATA configuration:
#define CFG_ATA_BASE_ADDR 0xa0300000 #define CFG_IDE_MAXDEVICE 1 #define CFG_IDE_MAXBUS 1 #define CFG_ATA_IDE0_OFFFSET 0 #define CFG_ATA_DATA_OFFSET 0 #define CFG_ATA_REG_OFFSET 1 #define CFG_ATA_ALT_OFFSET 0x00100001 #define CFG_ATA_STRIDE 2 #define ATA_RESET_TIME 5
Thanks.
Gregg
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