doc/README.INCA-IP

   1
   2 Flash programming on the INCA-IP board is complicated because of the
   3 EBU swapping unit. A BDI2000 can be used for flash programming only
   4 if the EBU swapping unit is enabled; otherwise it will not detect the
   5 flash memory. But the EBU swapping unit is disadbled after reset, so
   6 if you program some code to flash with the swapping unit on, it will
   7 not be runnable with the swapping unit off.
   8
   9 The consequence is that you have to write a pre-swapped image to
  10 flash using the BDI2000. A simple host-side tool "inca-swap-bytes" is
  11 provided in the "tools/" directory. Use it as follows:
  12
  13         bash$ ./inca-swap-bytes <u-boot.bin >u-boot.bin.swp
  14
  15 Note that the current BDI config file _disables_ the EBU swapping
  16 unit for the flash bank 0. To enable it, (this is required for the
  17 BDI flash commands to work) uncomment the following line in the
  18 config file:
  19
  20         ;WM32   0xb8000260      0x404161ff ; Swapping unit enabled
  21
  22 and comment out
  23
  24         WM32    0xb8000260      0x004161ff ; Swapping unit disabled
  25
  26 Alternatively, you can use "mm 0xb8000260 <value>" commands to
  27 enable/disable the swapping unit manually.
  28
  29 Just for reference, here is the complete sequence of actions we took
  30 to install a U-Boot image into flash.
  31
  32     1. ./inca-swap-bytes <u-boot.bin >u-boot.bin.swp
  33
  34     2. From BDI:
  35
  36         mm 0xb8000260  0x404161ff
  37         erase 0xb0000000
  38         erase 0xb0010000
  39         prog 0xb0000000 /tftpboot/INCA/u-boot.bin.swp bin
  40         mm 0xb8000260 0x004161ff
  41         go 0xb0000000
  42
  43
  44 (C) 2003 Wolfgang Denk