From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 20:49:45 +0200
Subject: Adding upstream version 6.1.76.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 arch/sh/boards/mach-migor/sdram.S | 66 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100644 arch/sh/boards/mach-migor/sdram.S

(limited to 'arch/sh/boards/mach-migor/sdram.S')

diff --git a/arch/sh/boards/mach-migor/sdram.S b/arch/sh/boards/mach-migor/sdram.S
new file mode 100644
index 000000000..3a6bee127
--- /dev/null
+++ b/arch/sh/boards/mach-migor/sdram.S
@@ -0,0 +1,66 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * Migo-R 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(migor_sdram_enter_start)
+
+	/* SBSC: disable power down and put in self-refresh mode */
+	mov.l	1f, r4
+	mov.l	2f, r1
+	mov.l	@r4, r2
+	or	r1, r2
+	mov.l   3f, r3
+	and	r3, r2
+	mov.l	r2, @r4
+
+	rts
+	 nop
+
+	.balign 4
+1:	.long	0xfe400008 /* SDCR0 */
+2:	.long	0x00000400
+3:	.long	0xffff7fff
+ENTRY(migor_sdram_enter_end)
+
+	.balign 4
+ENTRY(migor_sdram_leave_start)
+
+	/* SBSC: set auto-refresh mode */
+	mov.l	1f, r4
+	mov.l	@r4, r0
+	mov.l   4f, r1
+	and	r1, r0
+	mov.l	r0, @r4
+	mov.l	6f, r4
+	mov.l	8f, r0
+	mov.l	@r4, r1
+	mov	#-1, r4
+	add	r4, r1
+	or	r1, r0
+	mov.l	7f, r1
+	mov.l	r0, @r1
+
+	rts
+	 nop
+
+	.balign 4
+1:	.long	0xfe400008 /* SDCR0 */
+4:	.long	0xfffffbff
+6:	.long   0xfe40001c /* RTCOR */
+7:	.long   0xfe400018 /* RTCNT */
+8:	.long   0xa55a0000
+ENTRY(migor_sdram_leave_end)
-- 
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