From 63c961420d0be21aa2a34c1527260d448f6961b1 Mon Sep 17 00:00:00 2001
From: Kolja Waschk <urjtag@ixo.de>
Date: Sat, 16 Feb 2008 09:43:50 +0000
Subject: [PATCH] Added new jedec_exp detection, just for debug (no actual
 detection, just printf); disabled by default

git-svn-id: https://urjtag.svn.sourceforge.net/svnroot/urjtag/trunk@1020 b68d4a1b-bc3d-0410-92ed-d4ac073336b7
---
 jtag/ChangeLog               |  3 +++
 jtag/configure.ac            | 15 +++++++++++++++
 jtag/src/flash/Makefile.am   |  6 ++++++
 jtag/src/flash/detectflash.c | 17 ++++++++++++++---
 4 files changed, 38 insertions(+), 3 deletions(-)

diff --git a/jtag/ChangeLog b/jtag/ChangeLog
index ed89e29d..8da37d8f 100644
--- a/jtag/ChangeLog
+++ b/jtag/ChangeLog
@@ -1,5 +1,8 @@
 2008-02-15  Kolja Waschk <kawk>
 
+    * src/flash/Makefile.am, src/flash/jedec_exp.c, src/flash/detectflash.c,
+        configure.ac: Experimental new code for flash detection, to be enabled
+        during configuration with --enable-jedec-exp (disabled by default)
     * src/bus/s3c4510x.c: disable debug output (was enabled in 929..)
     * include/register.h, src/tap/register.c, src/discovery.c: report if tdo
         seems to be stuck during detect_register_size (ie. "detect").
diff --git a/jtag/configure.ac b/jtag/configure.ac
index 5a602d11..8d19ac03 100644
--- a/jtag/configure.ac
+++ b/jtag/configure.ac
@@ -395,6 +395,21 @@ AS_IF([test "x$conservative_flush" = xtrue], [
   AC_DEFINE(CONSERVATIVE_FLUSH, 1, [define if conservative queue flushing is enabled])
 ])
 
+dnl Enable experimental brute-force JEDEC flash autodetection?
+AC_ARG_ENABLE(jedec-exp,
+[  --enable-jedec-exp            Enable experimental JEDEC flash detection],
+[case "${enableval}" in
+   yes) jedecexp=true ;;
+   no)  jedecexp=false ;;
+   *)   AC_MSG_ERROR(bad value ${enableval} for --enable-jedec-exp) ;;
+ esac],
+[jedecexp=false])
+AS_IF([test "x$jedecexp" = xtrue], [
+  AM_CONDITIONAL(JEDEC_EXP, true)
+  AC_DEFINE(JEDEC_EXP, 1, [define if experimental JEDEC flash detection is enabled])
+],[
+  AM_CONDITIONAL(JEDEC_EXP, false)
+])
 
 AC_OUTPUT
 
diff --git a/jtag/src/flash/Makefile.am b/jtag/src/flash/Makefile.am
index c95334c9..08036829 100644
--- a/jtag/src/flash/Makefile.am
+++ b/jtag/src/flash/Makefile.am
@@ -32,3 +32,9 @@ libflash_a_SOURCES = \
 	detectflash.c \
 	intel.c \
 	jedec.c
+
+if JEDEC_EXP
+libflash_a_SOURCES += \
+	jedec_exp.c
+endif
+
diff --git a/jtag/src/flash/detectflash.c b/jtag/src/flash/detectflash.c
index a30605f1..fae2bc5b 100644
--- a/jtag/src/flash/detectflash.c
+++ b/jtag/src/flash/detectflash.c
@@ -41,6 +41,7 @@
 
 cfi_array_t *cfi_array = NULL;
 
+extern int jedec_exp_detect( bus_t *bus, uint32_t adr, cfi_array_t **cfi_array );
 extern int jedec_detect( bus_t *bus, uint32_t adr, cfi_array_t **cfi_array );
 
 extern int amd_detect(bus_t *bus, uint32_t adr, cfi_array_t **cfi_array ); //Ajith
@@ -66,17 +67,27 @@ detectflash( bus_t *bus, uint32_t adr )
 		cfi_array = NULL;
 		if (jedec_detect( bus, adr, &cfi_array ) != 0) {
 			cfi_array_free( cfi_array );
+			cfi_array = NULL;
 			if(amd_detect(bus, adr, &cfi_array ) != 0)
 			{
 				cfi_array_free( cfi_array );
-				cfi_array->bus_width = 1;
 				cfi_array = NULL;
-				printf( _("Flash not found!\n") );
-				return;
+#ifdef JEDEC_EXP
+				if (jedec_exp_detect( bus, adr, &cfi_array )) {
+					cfi_array_free( cfi_array );
+					cfi_array = NULL;
+				}
+#endif
 			}
 		}
 	}
 
+	if (cfi_array == NULL)
+	{
+		printf( _("Flash not found!\n") );
+		return;
+	}
+
 	cfi = &cfi_array->cfi_chips[0]->cfi;
 
 	/* detect CFI capable devices */