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diff --git a/doc/README.INCA-IP b/doc/README.INCA-IP new file mode 100644 index 0000000..517eec0 --- /dev/null +++ b/doc/README.INCA-IP @@ -0,0 +1,44 @@ + +Flash programming on the INCA-IP board is complicated because of the +EBU swapping unit. A BDI2000 can be used for flash programming only +if the EBU swapping unit is enabled; otherwise it will not detect the +flash memory. But the EBU swapping unit is disadbled after reset, so +if you program some code to flash with the swapping unit on, it will +not be runnable with the swapping unit off. + +The consequence is that you have to write a pre-swapped image to +flash using the BDI2000. A simple host-side tool "inca-swap-bytes" is +provided in the "tools/" directory. Use it as follows: + + bash$ ./inca-swap-bytes <u-boot.bin >u-boot.bin.swp + +Note that the current BDI config file _disables_ the EBU swapping +unit for the flash bank 0. To enable it, (this is required for the +BDI flash commands to work) uncomment the following line in the +config file: + + ;WM32 0xb8000260 0x404161ff ; Swapping unit enabled + +and comment out + + WM32 0xb8000260 0x004161ff ; Swapping unit disabled + +Alternatively, you can use "mm 0xb8000260 <value>" commands to +enable/disable the swapping unit manually. + +Just for reference, here is the complete sequence of actions we took +to install a U-Boot image into flash. + + 1. ./inca-swap-bytes <u-boot.bin >u-boot.bin.swp + + 2. From BDI: + + mm 0xb8000260 0x404161ff + erase 0xb0000000 + erase 0xb0010000 + prog 0xb0000000 /tftpboot/INCA/u-boot.bin.swp bin + mm 0xb8000260 0x004161ff + go 0xb0000000 + + +(C) 2003 Wolfgang Denk |