[U-Boot-Users] IDE interface on PPC has endian issue

[Gregg]

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