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Diffstat (limited to 'board/incaip/README')
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diff --git a/board/incaip/README b/board/incaip/README deleted file mode 100644 index 1329152..0000000 --- a/board/incaip/README +++ /dev/null @@ -1,57 +0,0 @@ - -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 - - -Ethernet autonegotiation needs some time to complete. Instead of -delaying the boot process in all cases, we just start the -autonegotiation process when U-Boot comes up and that is all. Most -likely, it will complete by the time the network transfer is -attempted for the first time. In the worst case, if a transfer is -attempted before the autonegotiation is complete, just a single -packet would be lost resulting in a single timeout error, and then -the transfer would proceed normally. So the time that we would have -lost unconditionally waiting for the autonegotiation to complete, we -have to wait only if the file transfer is started immediately after -reset. We've verified that this works for all the clock -configurations. - -(C) 2003 Wolfgang Denk |