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authorMagnus Damm <damm@opensource.se>2009-10-29 10:52:23 +0000
committerPaul Mundt <lethal@linux-sh.org>2009-10-30 11:59:26 +0900
commit3b9f2952a3eda738f5f2d7610b76e284cbac581f (patch)
tree23937cebe892efcb3d5d8767c0b5606f61aece4a /arch/sh/boards
parent67e522d0f91349127b3e0e536578be484cdb3367 (diff)
sh: Add ms7724se specific memory pre/post sleep code
Add self-refresh handling code for the MS7724SE board. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/boards')
-rw-r--r--arch/sh/boards/mach-se/7724/Makefile2
-rw-r--r--arch/sh/boards/mach-se/7724/sdram.S52
-rw-r--r--arch/sh/boards/mach-se/7724/setup.c12
3 files changed, 65 insertions, 1 deletions
diff --git a/arch/sh/boards/mach-se/7724/Makefile b/arch/sh/boards/mach-se/7724/Makefile
index 349cbd6ce82..a08b36830f0 100644
--- a/arch/sh/boards/mach-se/7724/Makefile
+++ b/arch/sh/boards/mach-se/7724/Makefile
@@ -7,4 +7,4 @@
#
#
-obj-y := setup.o irq.o \ No newline at end of file
+obj-y := setup.o irq.o sdram.o
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 00000000000..9040167d502
--- /dev/null
+++ b/arch/sh/boards/mach-se/7724/sdram.S
@@ -0,0 +1,52 @@
+/*
+ * MS7724SE 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(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 */
+
+ 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(ms7724se_sdram_leave_end)
diff --git a/arch/sh/boards/mach-se/7724/setup.c b/arch/sh/boards/mach-se/7724/setup.c
index ffb97f22783..ae23fa970e6 100644
--- a/arch/sh/boards/mach-se/7724/setup.c
+++ b/arch/sh/boards/mach-se/7724/setup.c
@@ -28,6 +28,7 @@
#include <asm/sh_eth.h>
#include <asm/clock.h>
#include <asm/sh_keysc.h>
+#include <asm/suspend.h>
#include <cpu/sh7724.h>
#include <mach-se/mach/se7724.h>
@@ -566,11 +567,22 @@ static void __init sh_eth_init(void)
#define SW41_G 0x4000
#define SW41_H 0x8000
+extern char ms7724se_sdram_enter_start;
+extern char ms7724se_sdram_enter_end;
+extern char ms7724se_sdram_leave_start;
+extern char ms7724se_sdram_leave_end;
+
static int __init devices_setup(void)
{
u16 sw = ctrl_inw(SW4140); /* select camera, monitor */
struct clk *fsia_clk;
+ /* register board specific self-refresh code */
+ sh_mobile_register_self_refresh(SUSP_SH_STANDBY | SUSP_SH_SF,
+ &ms7724se_sdram_enter_start,
+ &ms7724se_sdram_enter_end,
+ &ms7724se_sdram_leave_start,
+ &ms7724se_sdram_leave_end);
/* Reset Release */
ctrl_outw(ctrl_inw(FPGA_OUT) &
~((1 << 1) | /* LAN */