| wdenk | b02744a | 2003-04-05 00:53:31 +0000 | [diff] [blame] | 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 |