1 Summary 2 ======= 3 4 This README is about U-Boot support for TI's ARM 926EJS based family of SoCs. 5 These SOCs are used for cameras, video security and surveillance, DVR's, etc. 6 DaVinci SOC's comprise of DM644x, DM646x, DM35x and DM36x series of SOC's 7 Additionally there are some SOCs meant for the audio market which though have 8 an OMAP part number are very similar to the DaVinci series of SOC's 9 Additionally, some family members contain a TI DSP and/or graphics 10 co processors along with a host of other peripherals. 11 12 Currently the following boards are supported: 13 14 * TI DaVinci DM644x EVM 15 16 * TI DaVinci DM646x EVM 17 18 * TI DaVinci DM355 EVM 19 20 * TI DaVinci DM365 EVM 21 22 * TI DA830 EVM 23 24 * TI DA850 EVM 25 26 * DM355 based Leopard board 27 28 * DM644x based schmoogie board 29 30 * DM644x based sffsdr board 31 32 * DM644x based sonata board 33 34 Build 35 ===== 36 37 * TI DaVinci DM644x EVM: 38 39 make davinci_dvevm_config 40 make 41 42 * TI DaVinci DM646x EVM: 43 44 make davinci_dm6467evm_config 45 make 46 47 * TI DaVinci DM355 EVM: 48 49 make davinci_dm355evm_config 50 make 51 52 * TI DaVinci DM365 EVM: 53 54 make davinci_dm365evm_config 55 make 56 57 * TI DA830 EVM: 58 59 make da830evm_config 60 make 61 62 * TI DA850 EVM: 63 64 make da850evm_config 65 make 66 67 * DM355 based Leopard board: 68 69 make davinci_dm355leopard_config 70 make 71 72 * DM644x based schmoogie board: 73 74 make davinci_schmoogie_config 75 make 76 77 * DM644x based sffsdr board: 78 79 make davinci_sffsdr_config 80 make 81 82 * DM644x based sonata board: 83 84 make davinci_sonata_config 85 make 86 87 Bootloaders 88 =============== 89 90 The DaVinci SOC's use 2 bootloaders. The low level initialization 91 is done by a UBL(user boot loader). The UBL is written to a NAND/NOR/SPI flash 92 by a programmer. During initial bootup, the ROM Bootloader reads the UBL 93 from a storage device and loads it into the IRAM. The UBL then loads the U-Boot 94 into the RAM. 95 The programmers and UBL are always released as part of any standard TI 96 software release associated with an SOC. 97 98 Alternative boot method (DA850 EVM only): 99 For the DA850 EVM an SPL (secondary program loader, see doc/README.SPL) 100 is provided to load U-Boot directly from SPI flash. In this case, the 101 SPL does the low level initialization that is otherwise done by the SPL. 102 To build U-Boot with this SPL, do 103 make da850evm_config 104 make u-boot.ais 105 and program the resulting u-boot.ais file to the SPI flash of the DA850 EVM. 106 107 Environment Variables 108 ===================== 109 110 The DA850 EVM allows the user to specify the maximum cpu clock allowed by the 111 silicon, in Hz, via an environment variable "maxcpuclk". 112 113 The maximum clock rate allowed depends on the silicon populated on the EVM. 114 Please make sure you understand the restrictions placed on this clock in the 115 device specific datasheet before setting up this variable. This information is 116 passed to the Linux kernel using the ATAG_REVISION atag. 117 118 If "maxcpuclk" is not defined, the configuration CONFIG_DA850_EVM_MAX_CPU_CLK 119 is used to obtain this information. 120 121 Links 122 ===== 123 124 1) TI DaVinci DM355 EVM: 125 http://focus.ti.com/docs/prod/folders/print/tms320dm355.html 126 http://www.spectrumdigital.com/product_info.php?cPath=103&products_id=203&osCsid=c499af6087317f11b3da19b4e8f1af32 127 128 2) TI DaVinci DM365 EVM: 129 http://focus.ti.com/docs/prod/folders/print/tms320dm365.html?247SEM= 130 http://support.spectrumdigital.com/boards/evmdm365/revc/ 131 132 3) DaVinci DM355 based leopard board 133 http://designsomething.org/leopardboard/default.aspx 134 http://www.spectrumdigital.com/product_info.php?cPath=103&products_id=192&osCsid=67c20335668ffc57cb35727106eb24b1 135 136 4) TI DaVinci DM6467 EVM: 137 http://focus.ti.com/docs/prod/folders/print/tms320dm6467.html 138 http://support.spectrumdigital.com/boards/evmdm6467/revf/ 139 140 5) TI DaVinci DM6446 EVM: 141 http://focus.ti.com/docs/prod/folders/print/tms320dm6446.html 142 http://www.spectrumdigital.com/product_info.php?cPath=103&products_id=222 143 144 6) TI DA830 EVM 145 http://focus.ti.com/apps/docs/gencontent.tsp?appId=1&contentId=52385 146 http://www.spectrumdigital.com/product_info.php?cPath=37&products_id=214 147 148 7) TI DA850 EVM 149 http://focus.ti.com/docs/prod/folders/print/omap-l138.html 150 http://www.logicpd.com/products/development-kits/zoom-omap-l138-evm-development-kit 151 152 Davinci special defines 153 ======================= 154 155 CONFIG_SYS_DV_NOR_BOOT_CFG: AM18xx based boards, booting in NOR Boot mode 156 need a "NOR Boot Configuration Word" stored 157 in the NOR Flash. This define adds this. 158 More Info about this, see: 159 spraba5a.pdf chapter 3.1 160
