TCL: Add board file for EVAL_SPEAr320CPU

Initial support for SPEAr320 chip and for evaluation
board named EVAL_SPEAr320CPU.

Change-Id: I85524655769bcc610294a26db47a7a399256fbb7
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: http://openocd.zylin.com/231
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>

tcl/board/spear320cpu.cfg

@@ -0,0 +1,44 @@
+# Configuration for the ST SPEAr320 CPU board
+# EVAL_SPEAr320CPU Rev. 2.0
+# http://www.st.com/spear
+#
+# Date:      2011-11-18
+# Author:    Antonio Borneo <borneo.antonio@gmail.com>
+
+# The standard board has JTAG SRST not connected.
+# This script targets such boards using quirky code to bypass the issue.
+
+
+source [find mem_helper.tcl]
+source [find target/spear3xx.cfg]
+source [find chip/st/spear/spear3xx_ddr.tcl]
+source [find chip/st/spear/spear3xx.tcl]
+
+arm7_9 dcc_downloads enable
+arm7_9 fast_memory_access enable
+
+
+# Serial NOR on SMI CS0. 8Mbyte.
+set _FLASHNAME1 $_CHIPNAME.snor
+flash bank $_FLASHNAME1 stmsmi 0xf8000000 0 0 0 $_TARGETNAME
+
+if { [info exists BOARD_HAS_SRST] } {
+	# Modified board has SRST on JTAG connector
+	reset_config trst_and_srst separate srst_gates_jtag \
+		trst_push_pull srst_open_drain
+} else {
+	# Standard board has no SRST on JTAG connector
+	reset_config trst_only separate srst_gates_jtag trst_push_pull
+	source [find chip/st/spear/quirk_no_srst.tcl]
+}
+
+$_TARGETNAME configure -event reset-init { spear320cpu_init }
+
+proc spear320cpu_init {} {
+	reg pc 0xffff0020;	# loop forever
+
+	sp3xx_clock_default
+	sp3xx_common_init
+	sp3xx_ddr_init "mt47h64m16_3_333_cl5_async" $DDR_CHIPS
+	sp320_init
+}

tcl/board/spear320cpu_mod.cfg

@@ -0,0 +1,25 @@
+# Configuration for the ST SPEAr320 Evaluation board
+# EVAL_SPEAr320CPU Rev. 2.0, modified to enable SRST on JTAG connector
+# http://www.st.com/spear
+#
+# List of board modifications to enable SRST, as reported in
+# ST Application Note (FIXME: add reference).
+# - Modifications on the bottom layer:
+#    1. replace reset chip U7 with a STM6315SDW13F;
+#    2. add 0 ohm resistor R45. It is located close to JTAG connector.
+#    3. add a 10K ohm pull-up resistor on the reset wire named as
+#       POWERGOOD in the schematic.
+#
+# The easier way to do modification 3, is to use a resistor in package
+# 0603 or 0402 and solder it between R15 and R45:
+# - one pad soldered with the pad of R15 connected to 3.3V (this
+#   is the pad of R15 closer to R45)
+# - the other pad soldered with the nearest pad of R45.
+#
+# Date:      2011-11-18
+# Author:    Antonio Borneo <borneo.antonio@gmail.com>
+
+
+# Modified boards has SRST on JTAG connector
+set BOARD_HAS_SRST 1
+source [find board/spear320evb.cfg]

tcl/chip/st/spear/spear3xx.tcl

@@ -120,3 +120,10 @@ proc sp310_emi_init {} {
 	mww 0x4f000014 0x0000000e	;# control_0_reg
 	mww 0x4f000094 0x0000003f	;# ack_reg
 }
+
+
+# Specific init scripts for ST SPEAr320
+proc sp320_init {} {
+	mww 0xb300000c 0xffffac04	;# RAS function enable
+	mww 0xb3000010 0x00000001	;# RAS mode select
+}