1 files changed, 128 insertions, 0 deletions
diff --git a/arch/sh/boards/mach-se/7724/sdram.S b/arch/sh/boards/mach-se/7724/sdram.S
new file mode 100644
index 000000000..61c1fe78d
--- /dev/null
+++ b/arch/sh/boards/mach-se/7724/sdram.S
@@ -0,0 +1,128 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * MS7724SE 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(ms7724se_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(ms7724se_sdram_enter_end)
+
+	.balign 4
+ENTRY(ms7724se_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:
+
+	/* CPG: setup clocks before restarting external memory */
+
+	ED 0xA4150024, 0x00004000 /* PLLCR */
+
+	mov.l	FRQCRA,r0
+	mov.l	@r0,r3
+	mov.l	KICK,r1
+	or	r1, r3
+	mov.l	r3, @r0
+
+	mov.l	LSTATS,r0
+	mov	#1,r1
+WAIT_LSTATS:
+	mov.l	@r0,r3
+	tst	r1,r3
+	bf	WAIT_LSTATS
+
+	/* DBSC: re-initialize and put in auto-refresh */
+
+	ED 0xFD000108, 0x00000181 /* DBPDCNT0 */
+	ED 0xFD000020, 0x015B0002 /* DBCONF */
+	ED 0xFD000030, 0x03071502 /* DBTR0 */
+	ED 0xFD000034, 0x02020102 /* DBTR1 */
+	ED 0xFD000038, 0x01090405 /* DBTR2 */
+	ED 0xFD00003C, 0x00000002 /* DBTR3 */
+	ED 0xFD000008, 0x00000005 /* DBKIND */
+	ED 0xFD000040, 0x00000001 /* DBRFPDN0 */
+	ED 0xFD000040, 0x00000000 /* DBRFPDN0 */
+	ED 0xFD000018, 0x00000001 /* DBCKECNT */
+
+	mov	#100,r0
+WAIT_400NS:
+	dt	r0
+	bf	WAIT_400NS
+
+	ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */
+	ED 0xFD000060, 0x00020000 /* DBMRCNT (EMR2) */
+	ED 0xFD000060, 0x00030000 /* DBMRCNT (EMR3) */
+	ED 0xFD000060, 0x00010004 /* DBMRCNT (EMR) */
+	ED 0xFD000060, 0x00000532 /* DBMRCNT (MRS) */
+	ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */
+	ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */
+	ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */
+	ED 0xFD000060, 0x00000432 /* DBMRCNT (MRS) */
+	ED 0xFD000060, 0x000103c0 /* DBMRCNT (EMR) */
+	ED 0xFD000060, 0x00010040 /* DBMRCNT (EMR) */
+
+	mov	#100,r0
+WAIT_400NS_2:
+	dt	r0
+	bf	WAIT_400NS_2
+
+	ED 0xFD000010, 0x00000001 /* DBEN */
+	ED 0xFD000044, 0x0000050f /* DBRFPDN1 */
+	ED 0xFD000048, 0x236800e6 /* DBRFPDN2 */
+
+	mov.l	DUMMY,r0
+	mov.l	@r0, r1 /* force single dummy read */
+
+	ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */
+	ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */
+	ED 0xFD000108, 0x00000080 /* DBPDCNT0 */
+	ED 0xFD000040, 0x00010000 /* DBRFPDN0 */
+
+	rts
+	 nop
+
+	.balign 4
+DUMMY:	.long	0xac400000
+FRQCRA:	.long	0xa4150000
+KICK:	.long	0x80000000
+LSTATS:	.long	0xa4150060
+
+ENTRY(ms7724se_sdram_leave_end)