sh: Add Ecovec24 specific memory pre/post sleep code

Add self-refresh handling code for the Ecovec24 board.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 52 insertions, 0 deletions

diff --git a/arch/sh/boards/mach-ecovec24/sdram.S b/arch/sh/boards/mach-ecovec24/sdram.S
new file mode 100644
index 000000000000..833440044407
--- /dev/null
+++ b/arch/sh/boards/mach-ecovec24/sdram.S
@@ -0,0 +1,52 @@
+/*
+ * Ecovec24 sdram self/auto-refresh setup code
+ *
+ *  Copyright (C) 2009 Magnus Damm
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/sys.h>
+#include <linux/errno.h>
+#include <linux/linkage.h>
+#include <asm/asm-offsets.h>
+#include <asm/suspend.h>
+#include <asm/romimage-macros.h>
+
+/* code to enter and leave self-refresh. must be self-contained.
+ * this code will be copied to on-chip memory and executed from there.
+ */
+        .balign 4
+ENTRY(ecovec24_sdram_enter_start)
+
+        /* DBSC: put memory in self-refresh mode */
+
+        ED 0xFD000010, 0x00000000 /* DBEN */
+        ED 0xFD000040, 0x00000000 /* DBRFPDN0 */
+        ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */
+        ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */
+        ED 0xFD000040, 0x00000001 /* DBRFPDN0 */
+
+        rts
+         nop
+
+ENTRY(ecovec24_sdram_enter_end)
+
+        .balign 4
+ENTRY(ecovec24_sdram_leave_start)
+
+        /* DBSC: put memory in auto-refresh mode */
+
+        ED 0xFD000040, 0x00000000 /* DBRFPDN0 */
+        WAIT 1
+        ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */
+        ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */
+        ED 0xFD000010, 0x00000001 /* DBEN */
+        ED 0xFD000040, 0x00010000 /* DBRFPDN0 */
+
+        rts
+         nop
+
+ENTRY(ecovec24_sdram_leave_end)