1 # SPDX-License-Identifier: GPL-2.0-or-later
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.
9 source [find target/ti_dm6446.cfg]
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.
15 if { [info exists J4_OPTION] } {
16 # NOR, NAND, SRAM, ...
17 set CS2_MODE $J4_OPTION
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)
28 # S3.3 = 0 ==> 8 bit bus width
29 # S3.3 = 1 ==> 16 bit bus width
31 # S3.4 = 0 ==> controlled by ARM
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
48 # maybe it's HPI boot? can't tell...
49 echo "WARNING: CS2/flash configuration not recognized"
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 }
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.
62 proc dm6446evm_init {} {
64 echo "Initialize DM6446 EVM board"
66 # FIXME initialize everything: