add icnova_sam9g45_sodimm support

This adds support for in-circuit icnova sam9g45 sodimm: http://www.ic-board.de/product_info.php?info=p214_ICnova-SAM9G45-SODIMM.html|ICnova
The NAND flash is not yet working.

Change-Id: I94ca5203f8d8a55dec1e4e87cd0631bd2b8393f9
Signed-off-by: lars@kiwigrid.com
Reviewed-on: http://openocd.zylin.com/418
Tested-by: jenkins
Reviewed-by: Øyvind Harboe <oyvindharboe@gmail.com>
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>

1 files changed, 278 insertions, 0 deletions

diff --git a/tcl/board/icnova_sam9g45_sodimm.cfg b/tcl/board/icnova_sam9g45_sodimm.cfg
new file mode 100644
index 0000000..84dab38
--- /dev/null
+++ b/tcl/board/icnova_sam9g45_sodimm.cfg
@@ -0,0 +1,278 @@
+#################################################################################################
+#												                                                #
+# Author: Lars Poeschel (larsi@wh2.tu-dresden.de)												#
+# Generated for In-Circuit ICnova SAM9G45 SODIMM												#
+# http://www.ic-board.de/product_info.php?info=p214_ICnova-SAM9G45-SODIMM.html|ICnova			#
+#																								#
+#################################################################################################
+
+# FIXME use some standard target config, maybe create one from this
+#
+#	source [find target/...cfg]
+
+source [find target/at91sam9g45.cfg]
+
+# Set reset type.
+# reset_config trst_and_srst
+
+# adapter_nsrst_delay 200
+# jtag_ntrst_delay 200
+
+
+# If you don't want to execute built-in boot rom code (and there are good reasons at times not to do that) in the
+# AT91SAM9 family, the microcontroller is a lump on a log without initialization.  Because this family has
+# some powerful features, we want to have a special function that handles "reset init".  To do this we declare
+# an event handler where these special activities can take place.
+
+scan_chain
+$_TARGETNAME configure -event reset-init {at91sam9g45_init}
+
+# Set fallback clock to 1/6 of worst-case clock speed (which would be the 32.768 kHz slow clock).
+# Slow-speed oscillator enabled at reset, so run jtag speed slow.
+$_TARGETNAME configure -event reset-start {at91sam9g45_start}
+
+
+# NandFlash configuration and definition
+# Future TBD
+# Flash configuration
+# flash bank cfi <base> <size> <chip width> <bus width> <target#>
+set _FLASHNAME $_CHIPNAME.flash
+# set _NANDNAME $_CHIPNAME.nand
+flash bank $_FLASHNAME cfi 0x10000000 0x00800000 2 2 $_TARGETNAME
+# nand device $_NANDNAME at91sam9 $_TARGETNAME 0x40000000 0xFFFFE800
+
+
+proc read_register {register} {
+        set result ""
+        mem2array result 32 $register 1
+        return $result(0)
+}
+
+proc at91sam9g45_start { } {
+
+	# Make sure that the the jtag is running slow, since there are a number of different ways the board
+	# can be configured coming into this state that can cause communication problems with the jtag
+	# adapter.  Also since this call can be made following a "reset init" where fast memory accesses
+	# are enabled, need to temporarily shut this down so that the RSTC_MR register can be written at slower
+	# jtag speed without causing GDB keep alive problem.
+
+	arm7_9 fast_memory_access disable
+    # Slow-speed oscillator enabled at reset, so run jtag speed slow.
+	adapter_khz 4
+    # Make sure processor is halted, or error will result in following steps.
+	halt
+	wait_halt 10000
+    # RSTC_MR : enable user reset.
+	mww 0xfffffd08 0xa5000501
+}
+
+
+proc at91sam9g45_init { } {
+
+	# At reset AT91SAM9G45 chip runs on slow clock (32.768 kHz).  To shift over to a normal clock requires
+	# a number of steps that must be carefully performed.  The process outline below follows the
+	# recommended procedure outlined in the AT91SAM9G45 technical manual.
+	#
+	# Several key and very important things to keep in mind:
+	# The SDRAM parts used currently on the board are -75 grade parts.  This
+	# means the master clock (MCLK) must be at or below 133 MHz or timing errors will occur.  The processor
+	# core can operate up to 400 MHz and therefore PCLK must be at or below this to function properly.
+
+	# Make sure processor is halted, or error will result in following steps.
+	halt
+	# RSTC_MR : enable user reset.
+	mww 0xfffffd08 0xa5000501
+	# WDT_MR : disable watchdog.
+	mww 0xfffffd44 0x00008000
+
+	# Enable the main 15.000 MHz oscillator in CKGR_MOR register.
+	# Wait for MOSCS in PMC_SR to assert indicating oscillator is again stable after change to CKGR_MOR.
+
+	mww 0xfffffc20 0x00004001
+	while { [expr [read_register 0xfffffc68] & 0x01] != 1 } { sleep 1 }
+
+	# Set PLLA Register for 792.576 MHz (divider: bypass, multiplier: 43).
+	# Wait for LOCKA signal in PMC_SR to assert indicating PLLA is stable.
+
+	#mww 0xfffffc28 0x202a3f01
+	mww 0xfffffc28 0x20c73f03
+	while { [expr [read_register 0xfffffc68] & 0x02] != 2 } { sleep 1 }
+
+	# Set master system clock prescaler divide by 6 and processor clock divide by 2 in PMC_MCKR.
+	# Wait for MCKRDY signal from PMC_SR to assert.
+
+	#mww 0xfffffc30 0x00000101
+	mww 0xfffffc30 0x00001301
+	while { [expr [read_register 0xfffffc68] & 0x08] != 8 } { sleep 1 }
+
+	# Now change PMC_MCKR register to select PLLA.
+	# Wait for MCKRDY signal from PMC_SR to assert.
+
+	mww 0xfffffc30 0x00001302
+	while { [expr [read_register 0xfffffc68] & 0x08] != 8 } { sleep 1 }
+
+	# Processor and master clocks are now operating and stable at maximum frequency possible:
+	#	-> MCLK = 132.096 MHz
+	#	-> PCLK = 396.288 MHz
+
+	# Switch over to adaptive clocking.
+
+	adapter_khz 6000
+
+	# Enable faster DCC downloads.
+
+	arm7_9 dcc_downloads enable
+
+	# To be able to use external SDRAM, several peripheral configuration registers must
+	# be modified.  The first change is made to PIO_ASR to select peripheral functions
+	# for D15 through D31.  The second change is made to the PIO_PDR register to disable
+	# this for D15 through D31.
+
+#	mww 0xfffff870 0xffff0000
+#	mww 0xfffff804 0xffff0000
+
+	# The EBI chip select register EBI_CS must be specifically configured to enable the internal SDRAM controller
+	# using CS1.  Additionally we want CS3 assigned to NandFlash.  Also VDDIO is connected physically on
+	# the board to the 3.3 VDC power supply so set the appropriate register bit to notify the micrcontroller.
+
+	# mww 0xffffef1c 0x000100a
+
+	# The ICnova SAM9G45 SODIMM has built-in NandFlash.  The exact physical timing characteristics
+	# for the memory type used on the current board (MT29F2G08AACWP) can be established by setting
+	# four registers in order:  SMC_SETUP3, SMC_PULSE3, SMC_CYCLE3, and SMC_MODE3.
+
+	# mww 0xffffec30 0x00020002
+	# mww 0xffffec34 0x04040404
+	# mww 0xffffec38 0x00070007
+	# mww 0xffffec3c 0x00030003
+
+	# Identify NandFlash bank 0.  Disabled at the moment because a memory driver is not yet complete.
+
+#	nand probe 0
+
+    # SMC_SETUP0 : Setup SMC for NOR Flash
+	mww 0xffffe800 0x0012000a
+    # SMC_PULSE0
+	mww 0xffffe804 0x3b38343b
+    # SMC_CYCLE0
+	mww 0xffffe808 0x003f003f
+    # SMC_MODE0
+	mww 0xffffe80c 0x00001000
+    # Identify flash bank 0
+	flash probe 0
+
+	# Now setup SDRAM.  This is tricky and configuration is very important for reliability!  The current calculations
+	# are based on 2 x Samsung K4T51083QG memory.
+
+	# 0. Enable DDR2 Clock
+	mww 0xfffffc00 0x4
+	# 1. Program memory device type
+	# 1.1 configure the DDR controller
+	mww 0xffffe620 0x16
+	# 1.2 program the DDR controller
+	mww 0xffffe608 0x3d
+
+	# 2. program memory device features
+	# 2.1 assume timings for 7.5ns min clock period
+	mww 0xffffe60c 0x21128226
+	# 2.2 pSDDRC->HDDRSDRC2_T1PR
+	mww 0xffffe610 0x02c8100e
+	# 2.3 pSDDRC->HDDRSDRC2_T2PR
+	mww 0xffffe614 0x01000702
+	# 3. NOP
+	mww 0xffffe600 0x1
+	mww 0x70000000 0x1
+	# 3.1 delay 200us
+	sleep 1
+	# jim tcl alternative: after ms
+	# after 0.2
+
+	# 4. NOP
+	mww 0xffffe600 0x1
+	mww 0x70000000 0x1
+	# 4.1 delay 400ns
+
+	# 5. set all bank precharge
+	mww 0xffffe600 0x2
+	mww 0x70000000 0x1
+	# 5.1 delay 400ns
+
+	# 6. set EMR operation (EMRS2)
+	mww 0xffffe600 0x5
+	mww 0x74000000 0x1
+	# 6.1 delay 2 cycles
+
+	# 7. set EMR operation (EMRS3)
+	mww 0xffffe600 0x5
+	mww 0x76000000 0x1
+	# 7.1 delay 2 cycles
+
+	# 8. set EMR operation (EMRS1)
+	mww 0xffffe600 0x5
+	mww 0x72000000 0x1
+	# 8.1 delay 200 cycles (400Mhz -> 5 * 10^-7s)
+	sleep 1
+
+	# 9. Enable DLL Reset (set DLL bit)
+	set CR  [expr [read_register 0xffffe608] | 0x80]
+	mww 0xffffe608 $CR
+
+	# 10. mode register cycle to reset the DLL
+	mww 0xffffe600 0x5
+	mww 0x70000000 0x1
+	# 10.1 delay 2 cycles
+
+	# 11. set all bank precharge
+	mww 0xffffe600 0x2
+	mww 0x70000000 0x1
+	# 11.1 delay 400 ns
+
+	# 12. two auto-refresh (CBR) cycles are provided.
+	mww 0xffffe600 0x4
+	mww 0x70000000 0x1
+	# 12.1 delay 10 cycles
+	# 12.2 2nd cycle (schreiben des Mode Register sparen wir uns)
+	mww 0x70000000 0x1
+	# 12.3 delay 10 cycles
+
+	# 13. disable DLL reset (clear DLL bit)
+	set CR  [expr [read_register 0xffffe608] & 0xffffff7f]
+	mww 0xffffe608 $CR
+
+	# 14. mode register set cycle
+	mww 0xffffe600 0x3
+	mww 0x70000000 0x1
+
+	# 15. program OCD field (set OCD bits)
+	set CR  [expr [read_register 0xffffe608] | 0x7000]
+	mww 0xffffe608 $CR
+
+	# 16. (EMRS1)
+	mww 0xffffe600 0x5
+	mww 0x72000000 0x1
+	# 16.1 delay 2 cycles
+
+	# 17. disable OCD field (clear OCD bits)
+	set CR  [expr [read_register 0xffffe608] & 0xffff8fff]
+	mww 0xffffe608 $CR
+
+	# 18. (EMRS1)
+	mww 0xffffe600 0x5
+	mww 0x76000000 0x1
+	# 18.1 delay 2 cycles
+
+	# 19. normal mode command
+	mww 0xffffe600 0x0
+	mww 0x70000000 0x1
+
+	# 20. perform write to any address
+	#mww 0x70000000 0x1
+
+	# 21. write refresh rate into the count field of the refresh rate register
+	mww 0xffffe604 0x24b
+	# 21.1 delay (500 * 6 cycles)
+
+	arm7_9 fast_memory_access enable
+}
+
+