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authorMagnus Damm <damm@opensource.se>2009-10-30 05:23:51 +0100
committerPaul Mundt <lethal@linux-sh.org>2009-10-30 06:33:44 +0100
commit86c7d03a0fe4241e64eb19b86544647c8ee4bac9 (patch)
tree8c73bac966ed65aafadd52e0b18ad8c20ab11c05 /arch/sh
parentsh: Move ap325rxa board code into separate directory (diff)
downloadlinux-86c7d03a0fe4241e64eb19b86544647c8ee4bac9.tar.xz
linux-86c7d03a0fe4241e64eb19b86544647c8ee4bac9.zip
sh: Add ap325rxa specific memory pre/post sleep code
Add self-refresh handling code for the AP325RXA 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-ap325rxa/Makefile2
-rw-r--r--arch/sh/boards/mach-ap325rxa/sdram.S69
-rw-r--r--arch/sh/boards/mach-ap325rxa/setup.c13
3 files changed, 83 insertions, 1 deletions
diff --git a/arch/sh/boards/mach-ap325rxa/Makefile b/arch/sh/boards/mach-ap325rxa/Makefile
index 0ad249dbd351..4cf1774d2613 100644
--- a/arch/sh/boards/mach-ap325rxa/Makefile
+++ b/arch/sh/boards/mach-ap325rxa/Makefile
@@ -1,2 +1,2 @@
-obj-y := setup.o
+obj-y := setup.o sdram.o
diff --git a/arch/sh/boards/mach-ap325rxa/sdram.S b/arch/sh/boards/mach-ap325rxa/sdram.S
new file mode 100644
index 000000000000..db24fbed4fca
--- /dev/null
+++ b/arch/sh/boards/mach-ap325rxa/sdram.S
@@ -0,0 +1,69 @@
+/*
+ * AP325RXA 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(ap325rxa_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(ap325rxa_sdram_enter_end)
+
+ .balign 4
+ENTRY(ap325rxa_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(ap325rxa_sdram_leave_end)
diff --git a/arch/sh/boards/mach-ap325rxa/setup.c b/arch/sh/boards/mach-ap325rxa/setup.c
index b95deee35e0f..be8da973f00f 100644
--- a/arch/sh/boards/mach-ap325rxa/setup.c
+++ b/arch/sh/boards/mach-ap325rxa/setup.c
@@ -27,6 +27,7 @@
#include <video/sh_mobile_lcdc.h>
#include <asm/io.h>
#include <asm/clock.h>
+#include <asm/suspend.h>
#include <cpu/sh7723.h>
static struct smsc911x_platform_config smsc911x_config = {
@@ -481,8 +482,20 @@ static struct platform_device *ap325rxa_devices[] __initdata = {
&ap325rxa_camera[1],
};
+extern char ap325rxa_sdram_enter_start;
+extern char ap325rxa_sdram_enter_end;
+extern char ap325rxa_sdram_leave_start;
+extern char ap325rxa_sdram_leave_end;
+
static int __init ap325rxa_devices_setup(void)
{
+ /* register board specific self-refresh code */
+ sh_mobile_register_self_refresh(SUSP_SH_STANDBY | SUSP_SH_SF,
+ &ap325rxa_sdram_enter_start,
+ &ap325rxa_sdram_enter_end,
+ &ap325rxa_sdram_leave_start,
+ &ap325rxa_sdram_leave_end);
+
/* LD3 and LD4 LEDs */
gpio_request(GPIO_PTX5, NULL); /* RUN */
gpio_direction_output(GPIO_PTX5, 1);