1 files changed, 77 insertions, 0 deletions
diff --git a/arch/sh/boards/mach-kfr2r09/sdram.S b/arch/sh/boards/mach-kfr2r09/sdram.S
new file mode 100644
index 0000000000..f1b8985cb9
--- /dev/null
+++ b/arch/sh/boards/mach-kfr2r09/sdram.S
@@ -0,0 +1,77 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * KFR2R09 sdram self/auto-refresh setup code
+ *
+ *  Copyright (C) 2009 Magnus Damm
+ */
+
+#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(kfr2r09_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(kfr2r09_sdram_enter_end)
+
+	.balign 4
+ENTRY(kfr2r09_sdram_leave_start)
+
+	/* DBSC: put memory in auto-refresh mode */
+
+	mov.l	@(SH_SLEEP_MODE, r5), r0
+	tst	#SUSP_SH_RSTANDBY, r0
+	bf	resume_rstandby
+
+	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
+
+resume_rstandby:
+
+	/* DBSC: re-initialize and put in auto-refresh */
+
+	ED 0xFD000108, 0x40000301 /* DBPDCNT0 */
+	ED 0xFD000020, 0x011B0002 /* DBCONF */
+	ED 0xFD000030, 0x03060E02 /* DBTR0 */
+	ED 0xFD000034, 0x01020102 /* DBTR1 */
+	ED 0xFD000038, 0x01090406 /* DBTR2 */
+	ED 0xFD000008, 0x00000004 /* DBKIND */
+	ED 0xFD000040, 0x00000001 /* DBRFPDN0 */
+	ED 0xFD000040, 0x00000000 /* DBRFPDN0 */
+	ED 0xFD000018, 0x00000001 /* DBCKECNT */
+	WAIT 1
+	ED 0xFD000010, 0x00000001 /* DBEN */
+	ED 0xFD000044, 0x000004AF /* DBRFPDN1 */
+	ED 0xFD000048, 0x20CF0037 /* DBRFPDN2 */
+	ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */
+	ED 0xFD000108, 0x40000300 /* DBPDCNT0 */
+	ED 0xFD000040, 0x00010000 /* DBRFPDN0 */
+
+	rts
+	 nop
+
+ENTRY(kfr2r09_sdram_leave_end)