doc/README.davinci

   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 Environment Variables
  99 =====================
 100
 101 The DA850 EVM allows the user to specify the maximum cpu clock allowed by the
 102 silicon, in Hz, via an environment variable "maxcpuclk".
 103
 104 The maximum clock rate allowed depends on the silicon populated on the EVM.
 105 Please make sure you understand the restrictions placed on this clock in the
 106 device specific datasheet before setting up this variable. This information is
 107 passed to the Linux kernel using the ATAG_REVISION atag.
 108
 109 If "maxcpuclk" is not defined, the configuration CONFIG_DA850_EVM_MAX_CPU_CLK
 110 is used to obtain this information.
 111
 112 Links
 113 =====
 114
 115 1) TI DaVinci DM355 EVM:
 116 http://focus.ti.com/docs/prod/folders/print/tms320dm355.html
 117 http://www.spectrumdigital.com/product_info.php?cPath=103&products_id=203&osCsid=c499af6087317f11b3da19b4e8f1af32
 118
 119 2) TI DaVinci DM365 EVM:
 120 http://focus.ti.com/docs/prod/folders/print/tms320dm365.html?247SEM=
 121 http://support.spectrumdigital.com/boards/evmdm365/revc/
 122
 123 3) DaVinci DM355 based leopard board
 124 http://designsomething.org/leopardboard/default.aspx
 125 http://www.spectrumdigital.com/product_info.php?cPath=103&products_id=192&osCsid=67c20335668ffc57cb35727106eb24b1
 126
 127 4) TI DaVinci DM6467 EVM:
 128 http://focus.ti.com/docs/prod/folders/print/tms320dm6467.html
 129 http://support.spectrumdigital.com/boards/evmdm6467/revf/
 130
 131 5) TI DaVinci DM6446 EVM:
 132 http://focus.ti.com/docs/prod/folders/print/tms320dm6446.html
 133 http://www.spectrumdigital.com/product_info.php?cPath=103&products_id=222
 134
 135 6) TI DA830 EVM
 136 http://focus.ti.com/apps/docs/gencontent.tsp?appId=1&contentId=52385
 137 http://www.spectrumdigital.com/product_info.php?cPath=37&products_id=214
 138
 139 7) TI DA850 EVM
 140 http://focus.ti.com/docs/prod/folders/print/omap-l138.html
 141 http://www.logicpd.com/products/development-kits/zoom-omap-l138-evm-development-kit
 142
 143 Davinci special defines
 144 =======================
 145
 146 CONFIG_SYS_DV_NOR_BOOT_CFG:     AM18xx based boards, booting in NOR Boot mode
 147                                 need a "NOR Boot Configuration Word" stored
 148                                 in the NOR Flash. This define adds this.
 149                                 More Info about this, see:
 150                                 spraba5a.pdf chapter 3.1