| Summary |
| ======= |
| |
| This README is about U-Boot support for TI's ARM 926EJS based family of SoCs. |
| These SOCs are used for cameras, video security and surveillance, DVR's, etc. |
| DaVinci SOC's comprise of DM644x, DM646x, DM35x and DM36x series of SOC's |
| Additionally there are some SOCs meant for the audio market which though have |
| an OMAP part number are very similar to the DaVinci series of SOC's |
| Additionally, some family members contain a TI DSP and/or graphics |
| co processors along with a host of other peripherals. |
| |
| Currently the following boards are supported: |
| |
| * TI DaVinci DM644x EVM |
| |
| * TI DaVinci DM646x EVM |
| |
| * TI DaVinci DM355 EVM |
| |
| * TI DaVinci DM365 EVM |
| |
| * TI DA830 EVM |
| |
| * TI DA850 EVM |
| |
| * DM355 based Leopard board |
| |
| * DM644x based schmoogie board |
| |
| * DM644x based sffsdr board |
| |
| * DM644x based sonata board |
| |
| Build |
| ===== |
| |
| * TI DaVinci DM644x EVM: |
| |
| make davinci_dvevm_config |
| make |
| |
| * TI DaVinci DM646x EVM: |
| |
| make davinci_dm6467evm_config |
| make |
| |
| * TI DaVinci DM355 EVM: |
| |
| make davinci_dm355evm_config |
| make |
| |
| * TI DaVinci DM365 EVM: |
| |
| make davinci_dm365evm_config |
| make |
| |
| * TI DA830 EVM: |
| |
| make da830evm_config |
| make |
| |
| * TI DA850 EVM: |
| |
| make da850evm_config |
| make |
| |
| * DM355 based Leopard board: |
| |
| make davinci_dm355leopard_config |
| make |
| |
| * DM644x based schmoogie board: |
| |
| make davinci_schmoogie_config |
| make |
| |
| * DM644x based sffsdr board: |
| |
| make davinci_sffsdr_config |
| make |
| |
| * DM644x based sonata board: |
| |
| make davinci_sonata_config |
| make |
| |
| Bootloaders |
| =============== |
| |
| The DaVinci SOC's use 2 bootloaders. The low level initialization |
| is done by a UBL(user boot loader). The UBL is written to a NAND/NOR/SPI flash |
| by a programmer. During initial bootup, the ROM Bootloader reads the UBL |
| from a storage device and loads it into the IRAM. The UBL then loads the U-Boot |
| into the RAM. |
| The programmers and UBL are always released as part of any standard TI |
| software release associated with an SOC. |
| |
| Alternative boot method (DA850 EVM only): |
| For the DA850 EVM an SPL (secondary program loader, see doc/README.SPL) |
| is provided to load U-Boot directly from SPI flash. In this case, the |
| SPL does the low level initialization that is otherwise done by the SPL. |
| To build U-Boot with this SPL, do |
| make da850evm_config |
| make u-boot.ais |
| and program the resulting u-boot.ais file to the SPI flash of the DA850 EVM. |
| |
| Environment Variables |
| ===================== |
| |
| The DA850 EVM allows the user to specify the maximum cpu clock allowed by the |
| silicon, in Hz, via an environment variable "maxcpuclk". |
| |
| The maximum clock rate allowed depends on the silicon populated on the EVM. |
| Please make sure you understand the restrictions placed on this clock in the |
| device specific datasheet before setting up this variable. This information is |
| passed to the Linux kernel using the ATAG_REVISION atag. |
| |
| If "maxcpuclk" is not defined, the configuration CONFIG_DA850_EVM_MAX_CPU_CLK |
| is used to obtain this information. |
| |
| Links |
| ===== |
| |
| 1) TI DaVinci DM355 EVM: |
| http://focus.ti.com/docs/prod/folders/print/tms320dm355.html |
| http://www.spectrumdigital.com/product_info.php?cPath=103&products_id=203&osCsid=c499af6087317f11b3da19b4e8f1af32 |
| |
| 2) TI DaVinci DM365 EVM: |
| http://focus.ti.com/docs/prod/folders/print/tms320dm365.html?247SEM= |
| http://support.spectrumdigital.com/boards/evmdm365/revc/ |
| |
| 3) DaVinci DM355 based leopard board |
| http://designsomething.org/leopardboard/default.aspx |
| http://www.spectrumdigital.com/product_info.php?cPath=103&products_id=192&osCsid=67c20335668ffc57cb35727106eb24b1 |
| |
| 4) TI DaVinci DM6467 EVM: |
| http://focus.ti.com/docs/prod/folders/print/tms320dm6467.html |
| http://support.spectrumdigital.com/boards/evmdm6467/revf/ |
| |
| 5) TI DaVinci DM6446 EVM: |
| http://focus.ti.com/docs/prod/folders/print/tms320dm6446.html |
| http://www.spectrumdigital.com/product_info.php?cPath=103&products_id=222 |
| |
| 6) TI DA830 EVM |
| http://focus.ti.com/apps/docs/gencontent.tsp?appId=1&contentId=52385 |
| http://www.spectrumdigital.com/product_info.php?cPath=37&products_id=214 |
| |
| 7) TI DA850 EVM |
| http://focus.ti.com/docs/prod/folders/print/omap-l138.html |
| http://www.logicpd.com/products/development-kits/zoom-omap-l138-evm-development-kit |
| |
| Davinci special defines |
| ======================= |
| |
| CONFIG_SYS_DV_NOR_BOOT_CFG: AM18xx based boards, booting in NOR Boot mode |
| need a "NOR Boot Configuration Word" stored |
| in the NOR Flash. This define adds this. |
| More Info about this, see: |
| spraba5a.pdf chapter 3.1 |
