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authorBen Dooks <ben-linux@fluff.org>2006-12-06 01:50:24 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2006-12-07 16:17:49 +0000
commit9073341c2ba5d5e77b3d05d84cf9e3a16e8a7902 (patch)
tree96e35ea42213836fa949df8f5d4b20f6834f855d /arch/arm/mach-s3c2410
parentf9a8ca1cabf09316d79cab7f04e1390261ff9035 (diff)
[ARM] 3986/1: H1940: suspend to RAM support
Add support to suspend and resume, using the H1940's bootloader Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-s3c2410')
-rw-r--r--arch/arm/mach-s3c2410/Makefile2
-rw-r--r--arch/arm/mach-s3c2410/mach-h1940.c8
-rw-r--r--arch/arm/mach-s3c2410/pm-h1940.S33
-rw-r--r--arch/arm/mach-s3c2410/s3c2410-pm.c14
4 files changed, 55 insertions, 2 deletions
diff --git a/arch/arm/mach-s3c2410/Makefile b/arch/arm/mach-s3c2410/Makefile
index d66013365b6..0cd71dfec44 100644
--- a/arch/arm/mach-s3c2410/Makefile
+++ b/arch/arm/mach-s3c2410/Makefile
@@ -77,7 +77,7 @@ obj-$(CONFIG_MACH_AML_M5900) += mach-amlm5900.o
obj-$(CONFIG_MACH_ANUBIS) += mach-anubis.o
obj-$(CONFIG_MACH_OSIRIS) += mach-osiris.o
obj-$(CONFIG_ARCH_BAST) += mach-bast.o usb-simtec.o
-obj-$(CONFIG_ARCH_H1940) += mach-h1940.o
+obj-$(CONFIG_ARCH_H1940) += mach-h1940.o pm-h1940.o
obj-$(CONFIG_MACH_N30) += mach-n30.o
obj-$(CONFIG_ARCH_SMDK2410) += mach-smdk2410.o
obj-$(CONFIG_MACH_SMDK2413) += mach-smdk2413.o
diff --git a/arch/arm/mach-s3c2410/mach-h1940.c b/arch/arm/mach-s3c2410/mach-h1940.c
index 8c895c077d2..f5b98099a5d 100644
--- a/arch/arm/mach-s3c2410/mach-h1940.c
+++ b/arch/arm/mach-s3c2410/mach-h1940.c
@@ -33,6 +33,7 @@
#include <asm/arch/regs-serial.h>
#include <asm/arch/regs-lcd.h>
+#include <asm/arch/h1940.h>
#include <asm/arch/h1940-latch.h>
#include <asm/arch/fb.h>
@@ -41,6 +42,7 @@
#include "clock.h"
#include "devs.h"
#include "cpu.h"
+#include "pm.h"
static struct map_desc h1940_iodesc[] __initdata = {
[0] = {
@@ -164,12 +166,16 @@ static void __init h1940_map_io(void)
s3c24xx_init_clocks(0);
s3c24xx_init_uarts(h1940_uartcfgs, ARRAY_SIZE(h1940_uartcfgs));
s3c24xx_set_board(&h1940_board);
+
+ /* setup PM */
+
+ memcpy(phys_to_virt(H1940_SUSPEND_RESUMEAT), h1940_pm_return, 1024);
+ s3c2410_pm_init();
}
static void __init h1940_init_irq(void)
{
s3c24xx_init_irq();
-
}
static void __init h1940_init(void)
diff --git a/arch/arm/mach-s3c2410/pm-h1940.S b/arch/arm/mach-s3c2410/pm-h1940.S
new file mode 100644
index 00000000000..7d66de7ff7d
--- /dev/null
+++ b/arch/arm/mach-s3c2410/pm-h1940.S
@@ -0,0 +1,33 @@
+/* linux/arch/arm/mach-s3c2410/pm-h1940.S
+ *
+ * Copyright (c) 2006 Ben Dooks <ben-linux@fluff.org>
+ *
+ * H1940 Suspend to RAM
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+*/
+
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+#include <asm/hardware.h>
+#include <asm/arch/map.h>
+
+#include <asm/arch/regs-gpio.h>
+
+ .text
+ .global h1940_pm_return
+
+h1940_pm_return:
+ mov r0, #S3C2410_PA_GPIO
+ ldr pc, [ r0, #S3C2410_GSTATUS3 - S3C24XX_VA_GPIO ]
diff --git a/arch/arm/mach-s3c2410/s3c2410-pm.c b/arch/arm/mach-s3c2410/s3c2410-pm.c
index e51d7666951..9cd0c104f1c 100644
--- a/arch/arm/mach-s3c2410/s3c2410-pm.c
+++ b/arch/arm/mach-s3c2410/s3c2410-pm.c
@@ -32,6 +32,7 @@
#include <asm/mach-types.h>
#include <asm/arch/regs-gpio.h>
+#include <asm/arch/h1940.h>
#include "cpu.h"
#include "pm.h"
@@ -52,6 +53,19 @@ static void s3c2410_pm_prepare(void)
DBG("GSTATUS3 0x%08x\n", __raw_readl(S3C2410_GSTATUS3));
DBG("GSTATUS4 0x%08x\n", __raw_readl(S3C2410_GSTATUS4));
+ if (machine_is_h1940()) {
+ void *base = phys_to_virt(H1940_SUSPEND_CHECK);
+ unsigned long ptr;
+ unsigned long calc = 0;
+
+ /* generate check for the bootloader to check on resume */
+
+ for (ptr = 0; ptr < 0x40000; ptr += 0x400)
+ calc += __raw_readl(base+ptr);
+
+ __raw_writel(calc, phys_to_virt(H1940_SUSPEND_CHECKSUM));
+ }
+
if ( machine_is_aml_m5900() )
s3c2410_gpio_setpin(S3C2410_GPF2, 1);