summaryrefslogtreecommitdiffstats
path: root/arch/sh/boards/mach-ecovec24/sdram.S
diff options
context:
space:
mode:
authorPaul Mundt <lethal@linux-sh.org>2011-01-13 15:06:28 +0900
committerPaul Mundt <lethal@linux-sh.org>2011-01-13 15:06:28 +0900
commitf43dc23d5ea91fca257be02138a255f02d98e806 (patch)
treeb29722f6e965316e90ac97abf79923ced250dc21 /arch/sh/boards/mach-ecovec24/sdram.S
parentf8e53553f452dcbf67cb89c8cba63a1cd6eb4cc0 (diff)
parent4162cf64973df51fc885825bc9ca4d055891c49f (diff)
downloadtalos-op-linux-f43dc23d5ea91fca257be02138a255f02d98e806.tar.gz
talos-op-linux-f43dc23d5ea91fca257be02138a255f02d98e806.zip
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 into common/serial-rework
Conflicts: arch/sh/kernel/cpu/sh2/setup-sh7619.c arch/sh/kernel/cpu/sh2a/setup-mxg.c arch/sh/kernel/cpu/sh2a/setup-sh7201.c arch/sh/kernel/cpu/sh2a/setup-sh7203.c arch/sh/kernel/cpu/sh2a/setup-sh7206.c arch/sh/kernel/cpu/sh3/setup-sh7705.c arch/sh/kernel/cpu/sh3/setup-sh770x.c arch/sh/kernel/cpu/sh3/setup-sh7710.c arch/sh/kernel/cpu/sh3/setup-sh7720.c arch/sh/kernel/cpu/sh4/setup-sh4-202.c arch/sh/kernel/cpu/sh4/setup-sh7750.c arch/sh/kernel/cpu/sh4/setup-sh7760.c arch/sh/kernel/cpu/sh4a/setup-sh7343.c arch/sh/kernel/cpu/sh4a/setup-sh7366.c arch/sh/kernel/cpu/sh4a/setup-sh7722.c arch/sh/kernel/cpu/sh4a/setup-sh7723.c arch/sh/kernel/cpu/sh4a/setup-sh7724.c arch/sh/kernel/cpu/sh4a/setup-sh7763.c arch/sh/kernel/cpu/sh4a/setup-sh7770.c arch/sh/kernel/cpu/sh4a/setup-sh7780.c arch/sh/kernel/cpu/sh4a/setup-sh7785.c arch/sh/kernel/cpu/sh4a/setup-sh7786.c arch/sh/kernel/cpu/sh4a/setup-shx3.c arch/sh/kernel/cpu/sh5/setup-sh5.c drivers/serial/sh-sci.c drivers/serial/sh-sci.h include/linux/serial_sci.h
Diffstat (limited to 'arch/sh/boards/mach-ecovec24/sdram.S')
-rw-r--r--arch/sh/boards/mach-ecovec24/sdram.S111
1 files changed, 111 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..3963c6f23d52
--- /dev/null
+++ b/arch/sh/boards/mach-ecovec24/sdram.S
@@ -0,0 +1,111 @@
+/*
+ * 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)
+
+ mov.l @(SH_SLEEP_MODE, r5), r0
+ tst #SUSP_SH_RSTANDBY, r0
+ bf resume_rstandby
+
+ /* 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
+
+resume_rstandby:
+
+ /* 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
+
+ENTRY(ecovec24_sdram_leave_end)
OpenPOWER on IntegriCloud