| 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159 |
- 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
|
