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Diffstat (limited to 'u-boot/doc/README.at91')
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diff --git a/u-boot/doc/README.at91 b/u-boot/doc/README.at91 new file mode 100644 index 0000000..84b5595 --- /dev/null +++ b/u-boot/doc/README.at91 @@ -0,0 +1,124 @@ +Atmel AT91 Evaluation kits + +http://atmel.com/dyn/products/tools.asp?family_id=605#1443 + +I. Board mapping & boot media +------------------------------------------------------------------------------ +AT91SAM9260EK, AT91SAM9G20EK & AT91SAM9XEEK +------------------------------------------------------------------------------ + +Memory map + 0x20000000 - 23FFFFFF SDRAM (64 MB) + 0xC0000000 - Cxxxxxxx Atmel Dataflash card (J13) + 0xD0000000 - Dxxxxxxx Soldered Atmel Dataflash + +Environment variables + + U-Boot environment variables can be stored at different places: + - Dataflash on SPI chip select 1 (default) + - Dataflash on SPI chip select 0 (dataflash card) + - Nand flash. + + You can choose your storage location at config step (here for at91sam9260ek) : + make at91sam9260ek_config - use data flash (spi cs1) (default) + make at91sam9260ek_nandflash_config - use nand flash + make at91sam9260ek_dataflash_cs0_config - use data flash (spi cs0) + make at91sam9260ek_dataflash_cs1_config - use data flash (spi cs1) + + +------------------------------------------------------------------------------ +AT91SAM9261EK, AT91SAM9G10EK +------------------------------------------------------------------------------ + +Memory map + 0x20000000 - 23FFFFFF SDRAM (64 MB) + 0xC0000000 - Cxxxxxxx Soldered Atmel Dataflash + 0xD0000000 - Dxxxxxxx Atmel Dataflash card (J22) + +Environment variables + + U-Boot environment variables can be stored at different places: + - Dataflash on SPI chip select 0 (default) + - Dataflash on SPI chip select 3 (dataflash card) + - Nand flash. + + You can choose your storage location at config step (here for at91sam9260ek) : + make at91sam9261ek_config - use data flash (spi cs0) (default) + make at91sam9261ek_nandflash_config - use nand flash + make at91sam9261ek_dataflash_cs0_config - use data flash (spi cs0) + make at91sam9261ek_dataflash_cs3_config - use data flash (spi cs3) + + +------------------------------------------------------------------------------ +AT91SAM9263EK +------------------------------------------------------------------------------ + +Memory map + 0x20000000 - 23FFFFFF SDRAM (64 MB) + 0xC0000000 - Cxxxxxxx Atmel Dataflash card (J9) + +Environment variables + + U-Boot environment variables can be stored at different places: + - Dataflash on SPI chip select 0 (dataflash card) + - Nand flash. + - Nor falsh (not populate by default) + + You can choose your storage location at config step (here for at91sam9260ek) : + make at91sam9263ek_config - use data flash (spi cs0) (default) + make at91sam9263ek_nandflash_config - use nand flash + make at91sam9263ek_dataflash_cs0_config - use data flash (spi cs0) + make at91sam9263ek_norflash_config - use nor falsh + + You can choose to boot directly from U-Boot at config step + make at91sam9263ek_norflash_boot_config - boot from nor falsh + + +------------------------------------------------------------------------------ +AT91SAM9M10G45EK +------------------------------------------------------------------------------ + +Memory map + 0x20000000 - 23FFFFFF SDRAM (64 MB) + 0xC0000000 - Cxxxxxxx Atmel Dataflash card (J12) + +Environment variables + + U-Boot environment variables can be stored at different places: + - Dataflash on SPI chip select 0 (dataflash card) + - Nand flash. + + You can choose your storage location at config step (here for at91sam9m10g45ek) : + make at91sam9m10g45ek_config - use data flash (spi cs0) (default) + make at91sam9m10g45ek_nandflash_config - use nand flash + make at91sam9m10g45ek_dataflash_cs0_config - use data flash (spi cs0) + + +------------------------------------------------------------------------------ +AT91SAM9RLEK +------------------------------------------------------------------------------ + +Memory map + 0x20000000 - 23FFFFFF SDRAM (64 MB) + 0xC0000000 - Cxxxxxxx Soldered Atmel Dataflash + +Environment variables + + U-Boot environment variables can be stored at different places: + - Dataflash on SPI chip select 0 + - Nand flash. + + You can choose your storage location at config step (here for at91sam9260ek) : + make at91sam9263ek_config - use data flash (spi cs0) (default) + make at91sam9263ek_nandflash_config - use nand flash + make at91sam9263ek_dataflash_cs0_config - use data flash (spi cs0) + +II. Watchdog support + + For security reasons, the at91 watchdog is running at boot time and, + if deactivated, cannot be used anymore. + If you want to use the watchdog, you will need to keep it running in + your code (make sure not to disable it in AT91Bootstrap for instance). + + In the U-Boot configuration, the AT91 watchdog support is enabled using + the CONFIG_AT91SAM9_WATCHDOG and CONFIG_HW_WATCHDOG options. |