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# DM6446 EVM board
# http://focus.ti.com/docs/toolsw/folders/print/tmdsevm6446.html
# http://c6000.spectrumdigital.com/davincievm/
# EVM is just the board; buy that at Spectrum.
# The "kit" from TI also has: video camera, LCD video monitor, more.
source [find target/ti_dm6446.cfg]
# J4 controls what CS2 hooks up to, usually NOR or NAND flash.
# S3.1/S3.2 controls boot mode, which may force J4 and S3.3 settings.
# S3.3 controls AEMIF bus width.
if { [info exists J4_OPTION] } {
# NOR, NAND, SRAM, ...
set CS2_MODE $J4_OPTION
} else {
set CS2_MODE ""
}
# ARM boot:
# S3.1 = 0, S3.2 = 0 ==> ROM/UBL boot via NAND (J4 == NAND)
# S3.1 = 1, S3.2 = 0 ==> AEMIF boot (J4 == NOR or SRAM)
# S3.1 = 0, S3.2 = 1 ==> ROM/UBL boot via HPI
# S3.1 = 1, S3.2 = 1 ==> ROM/UBL boot via UART (J4 == don't care)
# AEMIF bus width:
# S3.3 = 0 ==> 8 bit bus width
# S3.3 = 1 ==> 16 bit bus width
# DSP boot:
# S3.4 = 0 ==> controlled by ARM
if { $CS2_MODE == "NOR" } {
# 16 Mbytes address space; 16 bit bus width
# (older boards used 32MB parts, with upper 16 MB unusable)
flash bank cfi 0x02000000 0x01000000 2 2 $_TARGETNAME
proc flashprobe {} { flash probe 0 }
} elseif { $CS2_MODE == "NAND" } {
# 64 Mbyte small page; 8 bit bus width
nand device davinci $_TARGETNAME 0x02000000 hwecc1 0x01e00000
proc flashprobe {} { nand probe 0 }
} elseif { $CS2_MODE == "SRAM" } {
# 4 Mbyte address space; 16 bit bus width
# loaded via JTAG or HPI
proc flashprobe {} {}
} else {
# maybe it's HPI boot? can't tell...
echo "WARNING: CS2/flash configuration not recognized"
proc flashprobe {} {}
}
# NOTE: disable or replace this call to dm6446evm_init if you're
# debugging new UBL code from SRAM (for NAND boot).
$_TARGETNAME configure -event reset-init { dm6446evm_init }
#
# This post-reset init is called when the MMU isn't active, all IRQs
# are disabled, etc. It should do most of what a UBL does, except for
# loading code (like U-Boot) into DRAM and running it.
#
proc dm6446evm_init {} {
puts "Initialize DM6446 EVM board"
# FIXME initialize everything:
# - PLL1
# - PLL2
# - PINMUX
# - PSC
# - DDR
# - AEMIF
# - UART0
# - icache
flashprobe
}
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