TCL scripts: add support for ST SPEAr310

Initial support for ST SPEAr310 and for the evaluation
board EVALSPEAr310 Rev. 2.0.
Scripts are split in generic for SPEAr3xx family and
specific for SPEAr310. This should easily allow adding
new members of the family.

Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>

1 files changed, 75 insertions, 0 deletions

diff --git a/tcl/chip/st/spear/quirk_no_srst.tcl b/tcl/chip/st/spear/quirk_no_srst.tcl
new file mode 100644
index 00000000..df227642
--- /dev/null
+++ b/tcl/chip/st/spear/quirk_no_srst.tcl
@@ -0,0 +1,75 @@
+# Quirks to bypass missing SRST on JTAG connector
+# EVALSPEAr310 Rev. 2.0
+# http://www.st.com/spear
+#
+# Date:      2010-08-17
+# Author:    Antonio Borneo <borneo.antonio@gmail.com>
+
+# For boards that have JTAG SRST not connected.
+# We use "arm9 vector_catch reset" to catch button reset event.
+
+
+$_TARGETNAME configure -event reset-assert sp_reset_assert
+$_TARGETNAME configure -event reset-deassert-post sp_reset_deassert_post
+
+# keeps the name of the SPEAr target
+global sp_target_name
+set sp_target_name $_TARGETNAME
+
+# Keeps the argument of "reset" command (run, init, halt).
+global sp_reset_mode
+set sp_reset_mode ""
+
+# Helper procedure. Returns 0 is target is halted.
+proc sp_is_halted {} {
+	global sp_target_name
+
+	return [expr [string compare [$sp_target_name curstate] "halted" ] == 0]
+}
+
+# wait for reset button to be pressed, causing CPU to get halted
+proc sp_reset_deassert_post {} {
+	global sp_reset_mode
+
+	set bar(0) |
+	set bar(1) /
+	set bar(2) -
+	set bar(3) \\
+
+	poll on
+	puts "====> Press reset button on the board <===="
+	for {set i 0} { [sp_is_halted] == 0 } { set i [expr $i + 1]} {
+		puts -nonewline "$bar([expr $i & 3])\r"
+		sleep 200
+	}
+
+	# Remove catch reset event
+	arm9 vector_catch none
+
+	# CPU is halted, but we typed "reset run" ...
+	if { [string compare $sp_reset_mode "run"] == 0 } {
+		resume
+	}
+}
+
+# Override reset-assert, since no SRST available
+# Catch reset event
+proc sp_reset_assert {} {
+	arm9 vector_catch reset
+}
+
+# Override default init_reset{mode} to catch parameter "mode"
+proc init_reset {mode} {
+	global sp_reset_mode
+
+	set sp_reset_mode $mode
+
+	# We need to detect CPU get halted, so exit from halt
+	if { [sp_is_halted] } {
+		echo "Resuming CPU to detect reset"
+		resume
+	}
+
+	# Execute default init_reset{mode}
+	jtag arp_init-reset
+}