tcl/board/dm6446evm.cfg

   1 # DM6446 EVM board
   2 #   http://focus.ti.com/docs/toolsw/folders/print/tmdsevm6446.html
   3 #   http://c6000.spectrumdigital.com/davincievm/
   4 # EVM is just the board; buy that at Spectrum.
   5 # The "kit" from TI also has: video camera, LCD video monitor, more.
   6
   7 source [find target/ti_dm6446.cfg]
   8
   9 # J4 controls what CS2 hooks up to, usually NOR or NAND flash.
  10 # S3.1/S3.2 controls boot mode, which may force J4 and S3.3 settings.
  11 # S3.3 controls AEMIF bus width.
  12
  13 if { [info exists J4_OPTION] } {
  14         # NOR, NAND, SRAM, ...
  15         set CS2_MODE $J4_OPTION
  16 } else {
  17         set CS2_MODE ""
  18 }
  19
  20 # ARM boot:
  21 #  S3.1 = 0, S3.2 = 0   ==> ROM/UBL boot via NAND (J4 == NAND)
  22 #  S3.1 = 1, S3.2 = 0   ==> AEMIF boot (J4 == NOR or SRAM)
  23 #  S3.1 = 0, S3.2 = 1   ==> ROM/UBL boot via HPI
  24 #  S3.1 = 1, S3.2 = 1   ==> ROM/UBL boot via UART (J4 == don't care)
  25 # AEMIF bus width:
  26 #  S3.3 = 0             ==> 8 bit bus width
  27 #  S3.3 = 1             ==> 16 bit bus width
  28 # DSP boot:
  29 #  S3.4 = 0             ==> controlled by ARM
  30
  31 if { $CS2_MODE == "NOR" } {
  32         # 16 Mbytes address space; 16 bit bus width
  33         # (older boards used 32MB parts, with upper 16 MB unusable)
  34         set _FLASHNAME $_CHIPNAME.flash
  35         flash bank $_FLASHNAME cfi 0x02000000 0x01000000 2 2 $_TARGETNAME
  36         proc flashprobe {} { flash probe 0 }
  37 } elseif { $CS2_MODE == "NAND" } {
  38         # 64 Mbyte small page; 8 bit bus width
  39         nand device davinci $_TARGETNAME 0x02000000 hwecc1 0x01e00000
  40         proc flashprobe {} { nand probe 0 }
  41 } elseif { $CS2_MODE == "SRAM" } {
  42         # 4 Mbyte address space; 16 bit bus width
  43         # loaded via JTAG or HPI
  44         proc flashprobe {} {}
  45 } else {
  46         # maybe it's HPI boot?  can't tell...
  47         echo "WARNING:  CS2/flash configuration not recognized"
  48         proc flashprobe {} {}
  49 }
  50
  51 # NOTE:  disable or replace this call to dm6446evm_init if you're
  52 # debugging new UBL code from SRAM (for NAND boot).
  53 $_TARGETNAME configure -event reset-init { dm6446evm_init }
  54
  55 #
  56 # This post-reset init is called when the MMU isn't active, all IRQs
  57 # are disabled, etc.  It should do most of what a UBL does, except for
  58 # loading code (like U-Boot) into DRAM and running it.
  59 #
  60 proc dm6446evm_init {} {
  61
  62         echo "Initialize DM6446 EVM board"
  63
  64         # FIXME initialize everything:
  65         #  - PLL1
  66         #  - PLL2
  67         #  - PINMUX
  68         #  - PSC
  69         #  - DDR
  70         #  - AEMIF
  71         #  - UART0
  72         #  - icache
  73
  74         flashprobe
  75 }