PXA255: support Intel "Lubbock" platform

Config for Intel's "Lubbock" PXA255 development board.  Even more
so than the PXA255 itself, this is obsolete.  AFAIK this was the
first generally available development platform for PXA255.  Intel
stopped providing these after other devel boards became available.

One interesting thing about this board from the OpenOCD perspective
is probably its flash configuration.  Each bank is 32 bits wide,
built from two 16-bit StrataFlash chips wired in parallel.  This
doubles throughput ... it reads/writes 32 bits in the time a single
chip takes to write just 16 bits.

This conf mostly works, given XScale bugfixes, but has some issues
(notably: no access to the on-board SDRAM) flagged by FIXMEs.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>

tcl/board/lubbock.cfg

@@ -0,0 +1,110 @@
+# Intel "Lubbock" Development Board with PXA255 (dbpxa255)
+#  Obsolete; this was Intel's original PXA255 development system
+#  Board also had CPU cards for SA1100, PXA210, PXA250, and more.
+
+source [find target/pxa255.cfg]
+
+jtag_nsrst_delay 250
+jtag_ntrst_delay 250
+
+# NOTE: until after pinmux and such are set up, only CS0 is
+# available ... not 2nd bank of CFI, or FPGA, SRAM, ENET, etc.
+
+# CS0, CS1 -- two banks of CFI flash, 32 MBytes each
+# each bank is 32-bits wide, two 16-bit chips in parallel
+flash bank cfi 0x00000000 0x02000000 2 4 $_TARGETNAME
+flash bank cfi 0x04000000 0x02000000 2 4 $_TARGETNAME
+
+# CS2 low -- FPGA registers
+# CS2 high -- 1 MByte SRAM at 0x0a00.0000 ... last 64K for scratch
+$_TARGETNAME configure -work-area-phys 0x0a0f0000
+
+$_TARGETNAME configure -event reset-assert-pre \
+	"$_TARGETNAME configure -work-area-size 0"
+
+# Make the hex led display a number, assuming CS2 is set up
+# and all digits have been enabled through the FPGA.
+proc hexled {u32} {
+	mww 0x08000010 $u32
+}
+
+# CS3 -- Ethernet
+# CS4 -- SA1111
+# CS5 -- PCMCIA
+
+# NOTE:  system console normally uses the FF UART connector
+
+proc lubbock_init {target} {
+
+	puts "Initialize PXA255 Lubbock board"
+
+	# (1) pinmux
+
+	# GPSR0..GPSR2
+	mww 0x40e00018 0x00008000
+	mww 0x40e0001c 0x00FC0382
+	mww 0x40e00020 0x0001FFFF
+	# GPDR0..GPDR2
+	mww 0x40e0000c 0x0060A800
+	mww 0x40e00010 0x00FF0382
+	mww 0x40e00014 0x0001C000
+	# GAFR0_[LU]..GAFR2_[LU]
+	mww 0x40e00054 0x98400000
+	mww 0x40e00058 0x00002950
+	mww 0x40e0005c 0x000A9558
+	mww 0x40e00060 0x0005AAAA
+	mww 0x40e00064 0xA0000000
+	mww 0x40e00068 0x00000002
+
+	# write PSSR, enable GPIOs
+	mww 0x40f00000 0x00000020
+
+	# write LED ctrl register ... ones disable
+	# high byte, 8 hex leds; low byte, 8 discretes
+	mwh 0x08000040 0xf0ff
+
+	hexled 0x0000
+
+	# (2) Address space setup
+
+	# MSC0/MSC1/MSC2
+	mww 0x48000008 0x23f223f2
+	mww 0x4800000c 0x3ff1a441
+	mww 0x48000010 0x7ff97ff1
+	# pcmcia/cf
+	mww 0x48000014 0x00000000
+	mww 0x48000028 0x00010504
+	mww 0x4800002c 0x00010504
+	mww 0x48000030 0x00010504
+	mww 0x48000034 0x00010504
+	mww 0x48000038 0x00004715
+	mww 0x4800003c 0x00004715
+
+	hexled 0x1111
+
+	# (3) SDRAM setup
+	# REVISIT this looks dubious ... no refresh cycles
+	mww 0x48000004 0x03CA4018
+	mww 0x48000004 0x004B4018
+	mww 0x48000004 0x000B4018
+	mww 0x48000004 0x000BC018
+	mww 0x48000000 0x00001AC8
+	mww 0x48000000 0x00001AC9
+
+	mww 0x48000040 0x00000000
+
+	# FIXME -- setup:
+	#  CLOCKS (and faster JTAG)
+	#  enable icache
+
+	# FIXME SRAM isn't working
+	# $target configure -work-area-size 0x10000
+
+	hexled 0x2222
+
+	flash probe 0
+	flash probe 1
+
+	hexled 0xcafe
+}
+$_TARGETNAME configure -event reset-init "lubbock_init $_TARGETNAME"