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authorMagnus Damm <damm@opensource.se>2009-10-29 10:52:15 +0000
committerPaul Mundt <lethal@linux-sh.org>2009-10-30 11:59:26 +0900
commit67e522d0f91349127b3e0e536578be484cdb3367 (patch)
tree5fc3a227aaf681509995c629e7b3835a33eb15f0 /arch/sh
parent159f8cd99ea0e3613cbb6aeea574af438f33d8d7 (diff)
sh: Add kfr2r09 specific memory pre/post sleep code
Add self-refresh handling code for the KFR2R09 board. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh')
-rw-r--r--arch/sh/boards/mach-kfr2r09/Makefile2
-rw-r--r--arch/sh/boards/mach-kfr2r09/sdram.S52
-rw-r--r--arch/sh/boards/mach-kfr2r09/setup.c13
3 files changed, 66 insertions, 1 deletions
diff --git a/arch/sh/boards/mach-kfr2r09/Makefile b/arch/sh/boards/mach-kfr2r09/Makefile
index 5d5867826e3b..4e577a3bf658 100644
--- a/arch/sh/boards/mach-kfr2r09/Makefile
+++ b/arch/sh/boards/mach-kfr2r09/Makefile
@@ -1,2 +1,2 @@
-obj-y := setup.o
+obj-y := setup.o sdram.o
obj-$(CONFIG_FB_SH_MOBILE_LCDC) += lcd_wqvga.o
diff --git a/arch/sh/boards/mach-kfr2r09/sdram.S b/arch/sh/boards/mach-kfr2r09/sdram.S
new file mode 100644
index 000000000000..4ce78fcf5674
--- /dev/null
+++ b/arch/sh/boards/mach-kfr2r09/sdram.S
@@ -0,0 +1,52 @@
+/*
+ * KFR2R09 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(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 */
+
+ 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(kfr2r09_sdram_leave_end)
diff --git a/arch/sh/boards/mach-kfr2r09/setup.c b/arch/sh/boards/mach-kfr2r09/setup.c
index 43d75ee93358..5dae632092f2 100644
--- a/arch/sh/boards/mach-kfr2r09/setup.c
+++ b/arch/sh/boards/mach-kfr2r09/setup.c
@@ -21,6 +21,7 @@
#include <media/soc_camera.h>
#include <media/sh_mobile_ceu.h>
#include <video/sh_mobile_lcdc.h>
+#include <asm/suspend.h>
#include <asm/clock.h>
#include <asm/machvec.h>
#include <asm/io.h>
@@ -444,8 +445,20 @@ static int kfr2r09_usb0_gadget_setup(void)
return 0;
}
+extern char kfr2r09_sdram_enter_start;
+extern char kfr2r09_sdram_enter_end;
+extern char kfr2r09_sdram_leave_start;
+extern char kfr2r09_sdram_leave_end;
+
static int __init kfr2r09_devices_setup(void)
{
+ /* register board specific self-refresh code */
+ sh_mobile_register_self_refresh(SUSP_SH_STANDBY | SUSP_SH_SF,
+ &kfr2r09_sdram_enter_start,
+ &kfr2r09_sdram_enter_end,
+ &kfr2r09_sdram_leave_start,
+ &kfr2r09_sdram_leave_end);
+
/* enable SCIF1 serial port for YC401 console support */
gpio_request(GPIO_FN_SCIF1_RXD, NULL);
gpio_request(GPIO_FN_SCIF1_TXD, NULL);