tcl/board/dm6446evm.cfg

   1 # SPDX-License-Identifier: GPL-2.0-or-later
   2
   3 # DM6446 EVM board
   4 #   http://focus.ti.com/docs/toolsw/folders/print/tmdsevm6446.html
   5 #   http://c6000.spectrumdigital.com/davincievm/
   6 # EVM is just the board; buy that at Spectrum.
   7 # The "kit" from TI also has: video camera, LCD video monitor, more.
   8
   9 source [find target/ti_dm6446.cfg]
  10
  11 # J4 controls what CS2 hooks up to, usually NOR or NAND flash.
  12 # S3.1/S3.2 controls boot mode, which may force J4 and S3.3 settings.
  13 # S3.3 controls AEMIF bus width.
  14
  15 if { [info exists J4_OPTION] } {
  16         # NOR, NAND, SRAM, ...
  17         set CS2_MODE $J4_OPTION
  18 } else {
  19         set CS2_MODE ""
  20 }
  21
  22 # ARM boot:
  23 #  S3.1 = 0, S3.2 = 0   ==> ROM/UBL boot via NAND (J4 == NAND)
  24 #  S3.1 = 1, S3.2 = 0   ==> AEMIF boot (J4 == NOR or SRAM)
  25 #  S3.1 = 0, S3.2 = 1   ==> ROM/UBL boot via HPI
  26 #  S3.1 = 1, S3.2 = 1   ==> ROM/UBL boot via UART (J4 == don't care)
  27 # AEMIF bus width:
  28 #  S3.3 = 0             ==> 8 bit bus width
  29 #  S3.3 = 1             ==> 16 bit bus width
  30 # DSP boot:
  31 #  S3.4 = 0             ==> controlled by ARM
  32
  33 if { $CS2_MODE == "NOR" } {
  34         # 16 Mbytes address space; 16 bit bus width
  35         # (older boards used 32MB parts, with upper 16 MB unusable)
  36         set _FLASHNAME $_CHIPNAME.flash
  37         flash bank $_FLASHNAME cfi 0x02000000 0x01000000 2 2 $_TARGETNAME
  38         proc flashprobe {} { flash probe 0 }
  39 } elseif { $CS2_MODE == "NAND" } {
  40         # 64 Mbyte small page; 8 bit bus width
  41         nand device davinci $_TARGETNAME 0x02000000 hwecc1 0x01e00000
  42         proc flashprobe {} { nand probe 0 }
  43 } elseif { $CS2_MODE == "SRAM" } {
  44         # 4 Mbyte address space; 16 bit bus width
  45         # loaded via JTAG or HPI
  46         proc flashprobe {} {}
  47 } else {
  48         # maybe it's HPI boot?  can't tell...
  49         echo "WARNING:  CS2/flash configuration not recognized"
  50         proc flashprobe {} {}
  51 }
  52
  53 # NOTE:  disable or replace this call to dm6446evm_init if you're
  54 # debugging new UBL code from SRAM (for NAND boot).
  55 $_TARGETNAME configure -event reset-init { dm6446evm_init }
  56
  57 #
  58 # This post-reset init is called when the MMU isn't active, all IRQs
  59 # are disabled, etc.  It should do most of what a UBL does, except for
  60 # loading code (like U-Boot) into DRAM and running it.
  61 #
  62 proc dm6446evm_init {} {
  63
  64         echo "Initialize DM6446 EVM board"
  65
  66         # FIXME initialize everything:
  67         #  - PLL1
  68         #  - PLL2
  69         #  - PINMUX
  70         #  - PSC
  71         #  - DDR
  72         #  - AEMIF
  73         #  - UART0
  74         #  - icache
  75
  76         flashprobe
  77 }