Merge branch 'next-s3c-pm' of git://aeryn.fluff.org.uk/bjdooks/linux into devel

Documentation/arm/Samsung-S3C24XX/Suspend.txt

@@ -40,13 +40,13 @@ Resuming
 Machine Support
 ---------------
 
-  The machine specific functions must call the s3c2410_pm_init() function
+  The machine specific functions must call the s3c_pm_init() function
   to say that its bootloader is capable of resuming. This can be as
   simple as adding the following to the machine's definition:
 
-  INITMACHINE(s3c2410_pm_init)
+  INITMACHINE(s3c_pm_init)
 
-  A board can do its own setup before calling s3c2410_pm_init, if it
+  A board can do its own setup before calling s3c_pm_init, if it
   needs to setup anything else for power management support.
 
   There is currently no support for over-riding the default method of
@@ -74,7 +74,7 @@ statuc void __init machine_init(void)
 
 	enable_irq_wake(IRQ_EINT0);
 
-	s3c2410_pm_init();
+	s3c_pm_init();
 }
 
 

arch/arm/mach-s3c2410/include/mach/gpio-nrs.h

@@ -0,0 +1,23 @@
+/* arch/arm/mach-s3c2410/include/mach/gpio-nrs.h
+ *
+ * Copyright (c) 2008 Simtec Electronics
+ *	http://armlinux.simtec.co.uk/
+ *	Ben Dooks <ben@simtec.co.uk>
+ *
+ * S3C2410 - GPIO bank numbering
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#define S3C2410_GPIONO(bank,offset) ((bank) + (offset))
+
+#define S3C2410_GPIO_BANKA   (32*0)
+#define S3C2410_GPIO_BANKB   (32*1)
+#define S3C2410_GPIO_BANKC   (32*2)
+#define S3C2410_GPIO_BANKD   (32*3)
+#define S3C2410_GPIO_BANKE   (32*4)
+#define S3C2410_GPIO_BANKF   (32*5)
+#define S3C2410_GPIO_BANKG   (32*6)
+#define S3C2410_GPIO_BANKH   (32*7)

arch/arm/mach-s3c2410/include/mach/gpio.h

@@ -23,3 +23,6 @@
 #define ARCH_NR_GPIOS	(256 + CONFIG_S3C24XX_GPIO_EXTRA)
 
 #include <asm-generic/gpio.h>
+#include <mach/gpio-nrs.h>
+
+#define S3C_GPIO_END	(S3C2410_GPIO_BANKH + 32)

arch/arm/mach-s3c2410/include/mach/irqs.h

@@ -80,7 +80,7 @@
 #define IRQ_EINT22     S3C2410_IRQ(50)
 #define IRQ_EINT23     S3C2410_IRQ(51)
 
-
+#define IRQ_EINT_BIT(x)	((x) - IRQ_EINT4 + 4)
 #define IRQ_EINT(x)    (((x) >= 4) ? (IRQ_EINT4 + (x) - 4) : (IRQ_EINT0 + (x)))
 
 #define IRQ_LCD_FIFO   S3C2410_IRQ(52)

arch/arm/mach-s3c2410/include/mach/regs-gpio.h

@@ -14,16 +14,7 @@
 #ifndef __ASM_ARCH_REGS_GPIO_H
 #define __ASM_ARCH_REGS_GPIO_H
 
-#define S3C2410_GPIONO(bank,offset) ((bank) + (offset))
-
-#define S3C2410_GPIO_BANKA   (32*0)
-#define S3C2410_GPIO_BANKB   (32*1)
-#define S3C2410_GPIO_BANKC   (32*2)
-#define S3C2410_GPIO_BANKD   (32*3)
-#define S3C2410_GPIO_BANKE   (32*4)
-#define S3C2410_GPIO_BANKF   (32*5)
-#define S3C2410_GPIO_BANKG   (32*6)
-#define S3C2410_GPIO_BANKH   (32*7)
+#include <mach/gpio-nrs.h>
 
 #ifdef CONFIG_CPU_S3C2400
 #define S3C24XX_GPIO_BASE(x)  S3C2400_GPIO_BASE(x)

arch/arm/mach-s3c2410/mach-h1940.c

@@ -203,7 +203,7 @@ static void __init h1940_map_io(void)
 #ifdef CONFIG_PM_H1940
 	memcpy(phys_to_virt(H1940_SUSPEND_RESUMEAT), h1940_pm_return, 1024);
 #endif
-	s3c2410_pm_init();
+	s3c_pm_init();
 }
 
 static void __init h1940_init_irq(void)

arch/arm/mach-s3c2410/mach-qt2410.c

@@ -355,7 +355,7 @@ static void __init qt2410_machine_init(void)
 	s3c2410_gpio_cfgpin(S3C2410_GPB5, S3C2410_GPIO_OUTPUT);
 
 	platform_add_devices(qt2410_devices, ARRAY_SIZE(qt2410_devices));
-	s3c2410_pm_init();
+	s3c_pm_init();
 }
 
 MACHINE_START(QT2410, "QT2410")

arch/arm/mach-s3c2410/pm.c

@@ -37,21 +37,14 @@
 #include <plat/cpu.h>
 #include <plat/pm.h>
 
-#ifdef CONFIG_S3C2410_PM_DEBUG
-extern void pm_dbg(const char *fmt, ...);
-#define DBG(fmt...) pm_dbg(fmt)
-#else
-#define DBG(fmt...) printk(KERN_DEBUG fmt)
-#endif
-
 static void s3c2410_pm_prepare(void)
 {
 	/* ensure at least GSTATUS3 has the resume address */
 
-	__raw_writel(virt_to_phys(s3c2410_cpu_resume), S3C2410_GSTATUS3);
+	__raw_writel(virt_to_phys(s3c_cpu_resume), S3C2410_GSTATUS3);
 
-	DBG("GSTATUS3 0x%08x\n", __raw_readl(S3C2410_GSTATUS3));
-	DBG("GSTATUS4 0x%08x\n", __raw_readl(S3C2410_GSTATUS4));
+	S3C_PMDBG("GSTATUS3 0x%08x\n", __raw_readl(S3C2410_GSTATUS3));
+	S3C_PMDBG("GSTATUS4 0x%08x\n", __raw_readl(S3C2410_GSTATUS4));
 
 	if (machine_is_h1940()) {
 		void *base = phys_to_virt(H1940_SUSPEND_CHECK);

arch/arm/mach-s3c2412/mach-jive.c

@@ -494,7 +494,7 @@ static int jive_pm_suspend(struct sys_device *sd, pm_message_t state)
 	 * correct address to resume from. */
 
 	__raw_writel(0x2BED, S3C2412_INFORM0);
-	__raw_writel(virt_to_phys(s3c2410_cpu_resume), S3C2412_INFORM1);
+	__raw_writel(virt_to_phys(s3c_cpu_resume), S3C2412_INFORM1);
 
 	return 0;
 }
@@ -630,7 +630,7 @@ static void __init jive_machine_init(void)
 
 	/* initialise the power management now we've setup everything. */
 
-	s3c2410_pm_init();
+	s3c_pm_init();
 
 	s3c_device_nand.dev.platform_data = &jive_nand_info;
 

arch/arm/mach-s3c2412/pm.c

@@ -85,7 +85,7 @@ static struct sleep_save s3c2412_sleep[] = {
 
 static int s3c2412_pm_suspend(struct sys_device *dev, pm_message_t state)
 {
-	s3c2410_pm_do_save(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep));
+	s3c_pm_do_save(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep));
 	return 0;
 }
 
@@ -98,7 +98,7 @@ static int s3c2412_pm_resume(struct sys_device *dev)
 	tmp |=  S3C2412_PWRCFG_STANDBYWFI_IDLE;
 	__raw_writel(tmp, S3C2412_PWRCFG);
 
-	s3c2410_pm_do_restore(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep));
+	s3c_pm_do_restore(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep));
 	return 0;
 }
 

arch/arm/mach-s3c2440/mach-rx3715.c

@@ -203,7 +203,7 @@ static void __init rx3715_init_machine(void)
 #ifdef CONFIG_PM_H1940
 	memcpy(phys_to_virt(H1940_SUSPEND_RESUMEAT), h1940_pm_return, 1024);
 #endif
-	s3c2410_pm_init();
+	s3c_pm_init();
 
 	s3c24xx_fb_set_platdata(&rx3715_fb_info);
 	platform_add_devices(rx3715_devices, ARRAY_SIZE(rx3715_devices));

arch/arm/mach-s3c24a0/include/mach/irqs.h

@@ -70,6 +70,8 @@
 #define IRQ_EINT17	S3C2410_IRQ(49)
 #define IRQ_EINT18	S3C2410_IRQ(50)
 
+#define IRQ_EINT_BIT(x) ((x) - IRQ_EINT00)
+
 /* SUB IRQS */
 #define IRQ_S3CUART_RX0		S3C2410_IRQ(51)	/* 67 */
 #define IRQ_S3CUART_TX0		S3C2410_IRQ(52)

arch/arm/plat-s3c/Makefile

@@ -18,6 +18,11 @@ obj-y				+= pwm-clock.o
 obj-y				+= gpio.o
 obj-y				+= gpio-config.o
 
+# PM support
+
+obj-$(CONFIG_PM)		+= pm.o
+obj-$(CONFIG_S3C2410_PM_CHECK)	+= pm-check.o
+
 # devices
 
 obj-$(CONFIG_S3C_DEV_HSMMC)	+= dev-hsmmc.o

arch/arm/plat-s3c/include/plat/pm.h

@@ -0,0 +1,174 @@
+/* linux/include/asm-arm/plat-s3c24xx/pm.h
+ *
+ * Copyright (c) 2004 Simtec Electronics
+ *	http://armlinux.simtec.co.uk/
+ *	Written by Ben Dooks, <ben@simtec.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+/* s3c_pm_init
+ *
+ * called from board at initialisation time to setup the power
+ * management
+*/
+
+#ifdef CONFIG_PM
+
+extern __init int s3c_pm_init(void);
+
+#else
+
+static inline int s3c_pm_init(void)
+{
+	return 0;
+}
+#endif
+
+/* configuration for the IRQ mask over sleep */
+extern unsigned long s3c_irqwake_intmask;
+extern unsigned long s3c_irqwake_eintmask;
+
+/* IRQ masks for IRQs allowed to go to sleep (see irq.c) */
+extern unsigned long s3c_irqwake_intallow;
+extern unsigned long s3c_irqwake_eintallow;
+
+/* per-cpu sleep functions */
+
+extern void (*pm_cpu_prep)(void);
+extern void (*pm_cpu_sleep)(void);
+
+/* Flags for PM Control */
+
+extern unsigned long s3c_pm_flags;
+
+/* from sleep.S */
+
+extern int  s3c_cpu_save(unsigned long *saveblk);
+extern void s3c_cpu_resume(void);
+
+extern void s3c2410_cpu_suspend(void);
+
+extern unsigned long s3c_sleep_save_phys;
+
+/* sleep save info */
+
+/**
+ * struct sleep_save - save information for shared peripherals.
+ * @reg: Pointer to the register to save.
+ * @val: Holder for the value saved from reg.
+ *
+ * This describes a list of registers which is used by the pm core and
+ * other subsystem to save and restore register values over suspend.
+ */
+struct sleep_save {
+	void __iomem	*reg;
+	unsigned long	val;
+};
+
+#define SAVE_ITEM(x) \
+	{ .reg = (x) }
+
+/**
+ * struct pm_uart_save - save block for core UART
+ * @ulcon: Save value for S3C2410_ULCON
+ * @ucon: Save value for S3C2410_UCON
+ * @ufcon: Save value for S3C2410_UFCON
+ * @umcon: Save value for S3C2410_UMCON
+ * @ubrdiv: Save value for S3C2410_UBRDIV
+ *
+ * Save block for UART registers to be held over sleep and restored if they
+ * are needed (say by debug).
+*/
+struct pm_uart_save {
+	u32	ulcon;
+	u32	ucon;
+	u32	ufcon;
+	u32	umcon;
+	u32	ubrdiv;
+};
+
+/* helper functions to save/restore lists of registers. */
+
+extern void s3c_pm_do_save(struct sleep_save *ptr, int count);
+extern void s3c_pm_do_restore(struct sleep_save *ptr, int count);
+extern void s3c_pm_do_restore_core(struct sleep_save *ptr, int count);
+
+#ifdef CONFIG_PM
+extern int s3c_irqext_wake(unsigned int irqno, unsigned int state);
+extern int s3c24xx_irq_suspend(struct sys_device *dev, pm_message_t state);
+extern int s3c24xx_irq_resume(struct sys_device *dev);
+#else
+#define s3c_irqext_wake NULL
+#define s3c24xx_irq_suspend NULL
+#define s3c24xx_irq_resume  NULL
+#endif
+
+/* PM debug functions */
+
+#ifdef CONFIG_S3C2410_PM_DEBUG
+/**
+ * s3c_pm_dbg() - low level debug function for use in suspend/resume.
+ * @msg: The message to print.
+ *
+ * This function is used mainly to debug the resume process before the system
+ * can rely on printk/console output. It uses the low-level debugging output
+ * routine printascii() to do its work.
+ */
+extern void s3c_pm_dbg(const char *msg, ...);
+
+#define S3C_PMDBG(fmt...) s3c_pm_dbg(fmt)
+#else
+#define S3C_PMDBG(fmt...) printk(KERN_DEBUG fmt)
+#endif
+
+/* suspend memory checking */
+
+#ifdef CONFIG_S3C2410_PM_CHECK
+extern void s3c_pm_check_prepare(void);
+extern void s3c_pm_check_restore(void);
+extern void s3c_pm_check_cleanup(void);
+extern void s3c_pm_check_store(void);
+#else
+#define s3c_pm_check_prepare() do { } while(0)
+#define s3c_pm_check_restore() do { } while(0)
+#define s3c_pm_check_cleanup() do { } while(0)
+#define s3c_pm_check_store()   do { } while(0)
+#endif
+
+/**
+ * s3c_pm_configure_extint() - ensure pins are correctly set for IRQ
+ *
+ * Setup all the necessary GPIO pins for waking the system on external
+ * interrupt.
+ */
+extern void s3c_pm_configure_extint(void);
+
+/**
+ * s3c_pm_restore_gpios() - restore the state of the gpios after sleep.
+ *
+ * Restore the state of the GPIO pins after sleep, which may involve ensuring
+ * that we do not glitch the state of the pins from that the bootloader's
+ * resume code has done.
+*/
+extern void s3c_pm_restore_gpios(void);
+
+/**
+ * s3c_pm_save_gpios() - save the state of the GPIOs for restoring after sleep.
+ *
+ * Save the GPIO states for resotration on resume. See s3c_pm_restore_gpios().
+ */
+extern void s3c_pm_save_gpios(void);
+
+/**
+ * s3c_pm_cb_flushcache - callback for assembly code
+ *
+ * Callback to issue flush_cache_all() as this call is
+ * not a directly callable object.
+ */
+extern void s3c_pm_cb_flushcache(void);
+
+extern void s3c_pm_save_core(void);
+extern void s3c_pm_restore_core(void);

arch/arm/plat-s3c/pm-check.c

@@ -0,0 +1,242 @@
+/* linux/arch/arm/plat-s3c/pm-check.c
+ *  originally in linux/arch/arm/plat-s3c24xx/pm.c
+ *
+ * Copyright (c) 2004,2006,2008 Simtec Electronics
+ *	http://armlinux.simtec.co.uk
+ *	Ben Dooks <ben@simtec.co.uk>
+ *
+ * S3C Power Mangament - suspend/resume memory corruptiuon check.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/kernel.h>
+#include <linux/suspend.h>
+#include <linux/init.h>
+#include <linux/crc32.h>
+#include <linux/ioport.h>
+
+#include <plat/pm.h>
+
+#if CONFIG_S3C2410_PM_CHECK_CHUNKSIZE < 1
+#error CONFIG_S3C2410_PM_CHECK_CHUNKSIZE must be a positive non-zero value
+#endif
+
+/* suspend checking code...
+ *
+ * this next area does a set of crc checks over all the installed
+ * memory, so the system can verify if the resume was ok.
+ *
+ * CONFIG_S3C2410_PM_CHECK_CHUNKSIZE defines the block-size for the CRC,
+ * increasing it will mean that the area corrupted will be less easy to spot,
+ * and reducing the size will cause the CRC save area to grow
+*/
+
+#define CHECK_CHUNKSIZE (CONFIG_S3C2410_PM_CHECK_CHUNKSIZE * 1024)
+
+static u32 crc_size;	/* size needed for the crc block */
+static u32 *crcs;	/* allocated over suspend/resume */
+
+typedef u32 *(run_fn_t)(struct resource *ptr, u32 *arg);
+
+/* s3c_pm_run_res
+ *
+ * go through the given resource list, and look for system ram
+*/
+
+static void s3c_pm_run_res(struct resource *ptr, run_fn_t fn, u32 *arg)
+{
+	while (ptr != NULL) {
+		if (ptr->child != NULL)
+			s3c_pm_run_res(ptr->child, fn, arg);
+
+		if ((ptr->flags & IORESOURCE_MEM) &&
+		    strcmp(ptr->name, "System RAM") == 0) {
+			S3C_PMDBG("Found system RAM at %08lx..%08lx\n",
+				  (unsigned long)ptr->start,
+				  (unsigned long)ptr->end);
+			arg = (fn)(ptr, arg);
+		}
+
+		ptr = ptr->sibling;
+	}
+}
+
+static void s3c_pm_run_sysram(run_fn_t fn, u32 *arg)
+{
+	s3c_pm_run_res(&iomem_resource, fn, arg);
+}
+
+static u32 *s3c_pm_countram(struct resource *res, u32 *val)
+{
+	u32 size = (u32)(res->end - res->start)+1;
+
+	size += CHECK_CHUNKSIZE-1;
+	size /= CHECK_CHUNKSIZE;
+
+	S3C_PMDBG("Area %08lx..%08lx, %d blocks\n",
+		  (unsigned long)res->start, (unsigned long)res->end, size);
+
+	*val += size * sizeof(u32);
+	return val;
+}
+
+/* s3c_pm_prepare_check
+ *
+ * prepare the necessary information for creating the CRCs. This
+ * must be done before the final save, as it will require memory
+ * allocating, and thus touching bits of the kernel we do not
+ * know about.
+*/
+
+void s3c_pm_check_prepare(void)
+{
+	crc_size = 0;
+
+	s3c_pm_run_sysram(s3c_pm_countram, &crc_size);
+
+	S3C_PMDBG("s3c_pm_prepare_check: %u checks needed\n", crc_size);
+
+	crcs = kmalloc(crc_size+4, GFP_KERNEL);
+	if (crcs == NULL)
+		printk(KERN_ERR "Cannot allocated CRC save area\n");
+}
+
+static u32 *s3c_pm_makecheck(struct resource *res, u32 *val)
+{
+	unsigned long addr, left;
+
+	for (addr = res->start; addr < res->end;
+	     addr += CHECK_CHUNKSIZE) {
+		left = res->end - addr;
+
+		if (left > CHECK_CHUNKSIZE)
+			left = CHECK_CHUNKSIZE;
+
+		*val = crc32_le(~0, phys_to_virt(addr), left);
+		val++;
+	}
+
+	return val;
+}
+
+/* s3c_pm_check_store
+ *
+ * compute the CRC values for the memory blocks before the final
+ * sleep.
+*/
+
+void s3c_pm_check_store(void)
+{
+	if (crcs != NULL)
+		s3c_pm_run_sysram(s3c_pm_makecheck, crcs);
+}
+
+/* in_region
+ *
+ * return TRUE if the area defined by ptr..ptr+size contains the
+ * what..what+whatsz
+*/
+
+static inline int in_region(void *ptr, int size, void *what, size_t whatsz)
+{
+	if ((what+whatsz) < ptr)
+		return 0;
+
+	if (what > (ptr+size))
+		return 0;
+
+	return 1;
+}
+
+/**
+ * s3c_pm_runcheck() - helper to check a resource on restore.
+ * @res: The resource to check
+ * @vak: Pointer to list of CRC32 values to check.
+ *
+ * Called from the s3c_pm_check_restore() via s3c_pm_run_sysram(), this
+ * function runs the given memory resource checking it against the stored
+ * CRC to ensure that memory is restored. The function tries to skip as
+ * many of the areas used during the suspend process.
+ */
+static u32 *s3c_pm_runcheck(struct resource *res, u32 *val)
+{
+	void *save_at = phys_to_virt(s3c_sleep_save_phys);
+	unsigned long addr;
+	unsigned long left;
+	void *stkpage;
+	void *ptr;
+	u32 calc;
+
+	stkpage = (void *)((u32)&calc & ~PAGE_MASK);
+
+	for (addr = res->start; addr < res->end;
+	     addr += CHECK_CHUNKSIZE) {
+		left = res->end - addr;
+
+		if (left > CHECK_CHUNKSIZE)
+			left = CHECK_CHUNKSIZE;
+
+		ptr = phys_to_virt(addr);
+
+		if (in_region(ptr, left, stkpage, 4096)) {
+			S3C_PMDBG("skipping %08lx, has stack in\n", addr);
+			goto skip_check;
+		}
+
+		if (in_region(ptr, left, crcs, crc_size)) {
+			S3C_PMDBG("skipping %08lx, has crc block in\n", addr);
+			goto skip_check;
+		}
+
+		if (in_region(ptr, left, save_at, 32*4 )) {
+			S3C_PMDBG("skipping %08lx, has save block in\n", addr);
+			goto skip_check;
+		}
+
+		/* calculate and check the checksum */
+
+		calc = crc32_le(~0, ptr, left);
+		if (calc != *val) {
+			printk(KERN_ERR "Restore CRC error at "
+			       "%08lx (%08x vs %08x)\n", addr, calc, *val);
+
+			S3C_PMDBG("Restore CRC error at %08lx (%08x vs %08x)\n",
+			    addr, calc, *val);
+		}
+
+	skip_check:
+		val++;
+	}
+
+	return val;
+}
+
+/**
+ * s3c_pm_check_restore() - memory check called on resume
+ *
+ * check the CRCs after the restore event and free the memory used
+ * to hold them
+*/
+void s3c_pm_check_restore(void)
+{
+	if (crcs != NULL)
+		s3c_pm_run_sysram(s3c_pm_runcheck, crcs);
+}
+
+/**
+ * s3c_pm_check_cleanup() - free memory resources
+ *
+ * Free the resources that where allocated by the suspend
+ * memory check code. We do this separately from the
+ * s3c_pm_check_restore() function as we cannot call any
+ * functions that might sleep during that resume.
+ */
+void s3c_pm_check_cleanup(void)
+{
+	kfree(crcs);
+	crcs = NULL;
+}
+

arch/arm/plat-s3c/pm.c

@@ -0,0 +1,363 @@
+/* linux/arch/arm/plat-s3c/pm.c
+ *
+ * Copyright 2008 Openmoko, Inc.
+ * Copyright 2004,2006,2008 Simtec Electronics
+ *	Ben Dooks <ben@simtec.co.uk>
+ *	http://armlinux.simtec.co.uk/
+ *
+ * S3C common power management (suspend to ram) support.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/init.h>
+#include <linux/suspend.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/serial_core.h>
+#include <linux/io.h>
+
+#include <asm/cacheflush.h>
+#include <mach/hardware.h>
+
+#include <plat/regs-serial.h>
+#include <mach/regs-clock.h>
+#include <mach/regs-gpio.h>
+#include <mach/regs-mem.h>
+#include <mach/regs-irq.h>
+#include <asm/irq.h>
+
+#include <plat/pm.h>
+#include <plat/pm-core.h>
+
+/* for external use */
+
+unsigned long s3c_pm_flags;
+
+/* Debug code:
+ *
+ * This code supports debug output to the low level UARTs for use on
+ * resume before the console layer is available.
+*/
+
+#ifdef CONFIG_S3C2410_PM_DEBUG
+extern void printascii(const char *);
+
+void s3c_pm_dbg(const char *fmt, ...)
+{
+	va_list va;
+	char buff[256];
+
+	va_start(va, fmt);
+	vsprintf(buff, fmt, va);
+	va_end(va);
+
+	printascii(buff);
+}
+
+static inline void s3c_pm_debug_init(void)
+{
+	/* restart uart clocks so we can use them to output */
+	s3c_pm_debug_init_uart();
+}
+
+#else
+#define s3c_pm_debug_init() do { } while(0)
+
+#endif /* CONFIG_S3C2410_PM_DEBUG */
+
+/* Save the UART configurations if we are configured for debug. */
+
+#ifdef CONFIG_S3C2410_PM_DEBUG
+
+struct pm_uart_save uart_save[CONFIG_SERIAL_SAMSUNG_UARTS];
+
+static void s3c_pm_save_uart(unsigned int uart, struct pm_uart_save *save)
+{
+	void __iomem *regs = S3C_VA_UARTx(uart);
+
+	save->ulcon = __raw_readl(regs + S3C2410_ULCON);
+	save->ucon = __raw_readl(regs + S3C2410_UCON);
+	save->ufcon = __raw_readl(regs + S3C2410_UFCON);
+	save->umcon = __raw_readl(regs + S3C2410_UMCON);
+	save->ubrdiv = __raw_readl(regs + S3C2410_UBRDIV);
+}
+
+static void s3c_pm_save_uarts(void)
+{
+	struct pm_uart_save *save = uart_save;
+	unsigned int uart;
+
+	for (uart = 0; uart < CONFIG_SERIAL_SAMSUNG_UARTS; uart++, save++)
+		s3c_pm_save_uart(uart, save);
+}
+
+static void s3c_pm_restore_uart(unsigned int uart, struct pm_uart_save *save)
+{
+	void __iomem *regs = S3C_VA_UARTx(uart);
+
+	__raw_writel(save->ulcon, regs + S3C2410_ULCON);
+	__raw_writel(save->ucon,  regs + S3C2410_UCON);
+	__raw_writel(save->ufcon, regs + S3C2410_UFCON);
+	__raw_writel(save->umcon, regs + S3C2410_UMCON);
+	__raw_writel(save->ubrdiv, regs + S3C2410_UBRDIV);
+}
+
+static void s3c_pm_restore_uarts(void)
+{
+	struct pm_uart_save *save = uart_save;
+	unsigned int uart;
+
+	for (uart = 0; uart < CONFIG_SERIAL_SAMSUNG_UARTS; uart++, save++)
+		s3c_pm_restore_uart(uart, save);
+}
+#else
+static void s3c_pm_save_uarts(void) { }
+static void s3c_pm_restore_uarts(void) { }
+#endif
+
+/* The IRQ ext-int code goes here, it is too small to currently bother
+ * with its own file. */
+
+unsigned long s3c_irqwake_intmask	= 0xffffffffL;
+unsigned long s3c_irqwake_eintmask	= 0xffffffffL;
+
+int s3c_irqext_wake(unsigned int irqno, unsigned int state)
+{
+	unsigned long bit = 1L << IRQ_EINT_BIT(irqno);
+
+	if (!(s3c_irqwake_eintallow & bit))
+		return -ENOENT;
+
+	printk(KERN_INFO "wake %s for irq %d\n",
+	       state ? "enabled" : "disabled", irqno);
+
+	if (!state)
+		s3c_irqwake_eintmask |= bit;
+	else
+		s3c_irqwake_eintmask &= ~bit;
+
+	return 0;
+}
+
+/* helper functions to save and restore register state */
+
+/**
+ * s3c_pm_do_save() - save a set of registers for restoration on resume.
+ * @ptr: Pointer to an array of registers.
+ * @count: Size of the ptr array.
+ *
+ * Run through the list of registers given, saving their contents in the
+ * array for later restoration when we wakeup.
+ */
+void s3c_pm_do_save(struct sleep_save *ptr, int count)
+{
+	for (; count > 0; count--, ptr++) {
+		ptr->val = __raw_readl(ptr->reg);
+		S3C_PMDBG("saved %p value %08lx\n", ptr->reg, ptr->val);
+	}
+}
+
+/**
+ * s3c_pm_do_restore() - restore register values from the save list.
+ * @ptr: Pointer to an array of registers.
+ * @count: Size of the ptr array.
+ *
+ * Restore the register values saved from s3c_pm_do_save().
+ *
+ * Note, we do not use S3C_PMDBG() in here, as the system may not have
+ * restore the UARTs state yet
+*/
+
+void s3c_pm_do_restore(struct sleep_save *ptr, int count)
+{
+	for (; count > 0; count--, ptr++) {
+		printk(KERN_DEBUG "restore %p (restore %08lx, was %08x)\n",
+		       ptr->reg, ptr->val, __raw_readl(ptr->reg));
+
+		__raw_writel(ptr->val, ptr->reg);
+	}
+}
+
+/**
+ * s3c_pm_do_restore_core() - early restore register values from save list.
+ *
+ * This is similar to s3c_pm_do_restore() except we try and minimise the
+ * side effects of the function in case registers that hardware might need
+ * to work has been restored.
+ *
+ * WARNING: Do not put any debug in here that may effect memory or use
+ * peripherals, as things may be changing!
+*/
+
+void s3c_pm_do_restore_core(struct sleep_save *ptr, int count)
+{
+	for (; count > 0; count--, ptr++)
+		__raw_writel(ptr->val, ptr->reg);
+}
+
+/* s3c2410_pm_show_resume_irqs
+ *
+ * print any IRQs asserted at resume time (ie, we woke from)
+*/
+static void s3c_pm_show_resume_irqs(int start, unsigned long which,
+				    unsigned long mask)
+{
+	int i;
+
+	which &= ~mask;
+
+	for (i = 0; i <= 31; i++) {
+		if (which & (1L<<i)) {
+			S3C_PMDBG("IRQ %d asserted at resume\n", start+i);
+		}
+	}
+}
+
+
+void (*pm_cpu_prep)(void);
+void (*pm_cpu_sleep)(void);
+
+#define any_allowed(mask, allow) (((mask) & (allow)) != (allow))
+
+/* s3c_pm_enter
+ *
+ * central control for sleep/resume process
+*/
+
+static int s3c_pm_enter(suspend_state_t state)
+{
+	static unsigned long regs_save[16];
+
+	/* ensure the debug is initialised (if enabled) */
+
+	s3c_pm_debug_init();
+
+	S3C_PMDBG("%s(%d)\n", __func__, state);
+
+	if (pm_cpu_prep == NULL || pm_cpu_sleep == NULL) {
+		printk(KERN_ERR "%s: error: no cpu sleep function\n", __func__);
+		return -EINVAL;
+	}
+
+	/* check if we have anything to wake-up with... bad things seem
+	 * to happen if you suspend with no wakeup (system will often
+	 * require a full power-cycle)
+	*/
+
+	if (!any_allowed(s3c_irqwake_intmask, s3c_irqwake_intallow) &&
+	    !any_allowed(s3c_irqwake_eintmask, s3c_irqwake_eintallow)) {
+		printk(KERN_ERR "%s: No wake-up sources!\n", __func__);
+		printk(KERN_ERR "%s: Aborting sleep\n", __func__);
+		return -EINVAL;
+	}
+
+	/* store the physical address of the register recovery block */
+
+	s3c_sleep_save_phys = virt_to_phys(regs_save);
+
+	S3C_PMDBG("s3c_sleep_save_phys=0x%08lx\n", s3c_sleep_save_phys);
+
+	/* save all necessary core registers not covered by the drivers */
+
+	s3c_pm_save_gpios();
+	s3c_pm_save_uarts();
+	s3c_pm_save_core();
+
+	/* set the irq configuration for wake */
+
+	s3c_pm_configure_extint();
+
+	S3C_PMDBG("sleep: irq wakeup masks: %08lx,%08lx\n",
+	    s3c_irqwake_intmask, s3c_irqwake_eintmask);
+
+	s3c_pm_arch_prepare_irqs();
+
+	/* call cpu specific preparation */
+
+	pm_cpu_prep();
+
+	/* flush cache back to ram */
+
+	flush_cache_all();
+
+	s3c_pm_check_store();
+
+	/* send the cpu to sleep... */
+
+	s3c_pm_arch_stop_clocks();
+
+	/* s3c_cpu_save will also act as our return point from when
+	 * we resume as it saves its own register state and restores it
+	 * during the resume.  */
+
+	s3c_cpu_save(regs_save);
+
+	/* restore the cpu state using the kernel's cpu init code. */
+
+	cpu_init();
+
+	/* restore the system state */
+
+	s3c_pm_restore_core();
+	s3c_pm_restore_uarts();
+	s3c_pm_restore_gpios();
+
+	s3c_pm_debug_init();
+
+	/* check what irq (if any) restored the system */
+
+	s3c_pm_arch_show_resume_irqs();
+
+	S3C_PMDBG("%s: post sleep, preparing to return\n", __func__);
+
+	s3c_pm_check_restore();
+
+	/* ok, let's return from sleep */
+
+	S3C_PMDBG("S3C PM Resume (post-restore)\n");
+	return 0;
+}
+
+/* callback from assembly code */
+void s3c_pm_cb_flushcache(void)
+{
+	flush_cache_all();
+}
+
+static int s3c_pm_prepare(void)
+{
+	/* prepare check area if configured */
+
+	s3c_pm_check_prepare();
+	return 0;
+}
+
+static void s3c_pm_finish(void)
+{
+	s3c_pm_check_cleanup();
+}
+
+static struct platform_suspend_ops s3c_pm_ops = {
+	.enter		= s3c_pm_enter,
+	.prepare	= s3c_pm_prepare,
+	.finish		= s3c_pm_finish,
+	.valid		= suspend_valid_only_mem,
+};
+
+/* s3c_pm_init
+ *
+ * Attach the power management functions. This should be called
+ * from the board specific initialisation if the board supports
+ * it.
+*/
+
+int __init s3c_pm_init(void)
+{
+	printk("S3C Power Management, Copyright 2004 Simtec Electronics\n");
+
+	suspend_set_ops(&s3c_pm_ops);
+	return 0;
+}

arch/arm/plat-s3c24xx/Makefile

@@ -27,6 +27,7 @@ obj-$(CONFIG_CPU_S3C244X)	+= s3c244x-irq.o
 obj-$(CONFIG_CPU_S3C244X)	+= s3c244x-clock.o
 obj-$(CONFIG_PM_SIMTEC)		+= pm-simtec.o
 obj-$(CONFIG_PM)		+= pm.o
+obj-$(CONFIG_PM)		+= irq-pm.o
 obj-$(CONFIG_PM)		+= sleep.o
 obj-$(CONFIG_HAVE_PWM)		+= pwm.o
 obj-$(CONFIG_S3C2410_CLOCK)	+= s3c2410-clock.o

arch/arm/plat-s3c24xx/common-smdk.c

@@ -201,5 +201,5 @@ void __init smdk_machine_init(void)
 
 	platform_add_devices(smdk_devs, ARRAY_SIZE(smdk_devs));
 
-	s3c2410_pm_init();
+	s3c_pm_init();
 }

arch/arm/plat-s3c24xx/include/plat/irq.h

@@ -10,6 +10,12 @@
  * published by the Free Software Foundation.
 */
 
+#include <linux/io.h>
+
+#include <mach/hardware.h>
+#include <mach/regs-irq.h>
+#include <mach/regs-gpio.h>
+
 #define irqdbf(x...)
 #define irqdbf2(x...)
 

arch/arm/plat-s3c24xx/include/plat/map.h

@@ -31,6 +31,8 @@
 #define S3C24XX_SZ_UART	   SZ_1M
 #define S3C_UART_OFFSET	   (0x4000)
 
+#define S3C_VA_UARTx(uart) (S3C_VA_UART + ((uart * S3C_UART_OFFSET)))
+
 /* Timers */
 #define S3C24XX_VA_TIMER   S3C_VA_TIMER
 #define S3C2410_PA_TIMER   (0x51000000)

arch/arm/plat-s3c24xx/include/plat/pm-core.h

@@ -0,0 +1,59 @@
+/* linux/arch/arm/plat-s3c24xx/include/plat/pll.h
+ *
+ * Copyright 2008 Simtec Electronics
+ *      Ben Dooks <ben@simtec.co.uk>
+ *      http://armlinux.simtec.co.uk/
+ *
+ * S3C24xx - PM core support for arch/arm/plat-s3c/pm.c
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+static inline void s3c_pm_debug_init_uart(void)
+{
+	unsigned long tmp = __raw_readl(S3C2410_CLKCON);
+
+	/* re-start uart clocks */
+	tmp |= S3C2410_CLKCON_UART0;
+	tmp |= S3C2410_CLKCON_UART1;
+	tmp |= S3C2410_CLKCON_UART2;
+
+	__raw_writel(tmp, S3C2410_CLKCON);
+	udelay(10);
+}
+
+static inline void s3c_pm_arch_prepare_irqs(void)
+{
+	__raw_writel(s3c_irqwake_intmask, S3C2410_INTMSK);
+	__raw_writel(s3c_irqwake_eintmask, S3C2410_EINTMASK);
+
+	/* ack any outstanding external interrupts before we go to sleep */
+
+	__raw_writel(__raw_readl(S3C2410_EINTPEND), S3C2410_EINTPEND);
+	__raw_writel(__raw_readl(S3C2410_INTPND), S3C2410_INTPND);
+	__raw_writel(__raw_readl(S3C2410_SRCPND), S3C2410_SRCPND);
+
+}
+
+static inline void s3c_pm_arch_stop_clocks(void)
+{
+	__raw_writel(0x00, S3C2410_CLKCON);  /* turn off clocks over sleep */
+}
+
+static void s3c_pm_show_resume_irqs(int start, unsigned long which,
+				    unsigned long mask);
+
+static inline void s3c_pm_arch_show_resume_irqs(void)
+{
+	S3C_PMDBG("post sleep: IRQs 0x%08x, 0x%08x\n",
+		  __raw_readl(S3C2410_SRCPND),
+		  __raw_readl(S3C2410_EINTPEND));
+
+	s3c_pm_show_resume_irqs(IRQ_EINT0, __raw_readl(S3C2410_SRCPND),
+				s3c_irqwake_intmask);
+
+	s3c_pm_show_resume_irqs(IRQ_EINT4-4, __raw_readl(S3C2410_EINTPEND),
+				s3c_irqwake_eintmask);
+}

arch/arm/plat-s3c24xx/include/plat/pm.h

@@ -1,73 +0,0 @@
-/* linux/include/asm-arm/plat-s3c24xx/pm.h
- *
- * Copyright (c) 2004 Simtec Electronics
- *	Written by Ben Dooks, <ben@simtec.co.uk>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
-*/
-
-/* s3c2410_pm_init
- *
- * called from board at initialisation time to setup the power
- * management
-*/
-
-#ifdef CONFIG_PM
-
-extern __init int s3c2410_pm_init(void);
-
-#else
-
-static inline int s3c2410_pm_init(void)
-{
-	return 0;
-}
-#endif
-
-/* configuration for the IRQ mask over sleep */
-extern unsigned long s3c_irqwake_intmask;
-extern unsigned long s3c_irqwake_eintmask;
-
-/* IRQ masks for IRQs allowed to go to sleep (see irq.c) */
-extern unsigned long s3c_irqwake_intallow;
-extern unsigned long s3c_irqwake_eintallow;
-
-/* per-cpu sleep functions */
-
-extern void (*pm_cpu_prep)(void);
-extern void (*pm_cpu_sleep)(void);
-
-/* Flags for PM Control */
-
-extern unsigned long s3c_pm_flags;
-
-/* from sleep.S */
-
-extern int  s3c2410_cpu_save(unsigned long *saveblk);
-extern void s3c2410_cpu_suspend(void);
-extern void s3c2410_cpu_resume(void);
-
-extern unsigned long s3c2410_sleep_save_phys;
-
-/* sleep save info */
-
-struct sleep_save {
-	void __iomem	*reg;
-	unsigned long	val;
-};
-
-#define SAVE_ITEM(x) \
-	{ .reg = (x) }
-
-extern void s3c2410_pm_do_save(struct sleep_save *ptr, int count);
-extern void s3c2410_pm_do_restore(struct sleep_save *ptr, int count);
-
-#ifdef CONFIG_PM
-extern int s3c24xx_irq_suspend(struct sys_device *dev, pm_message_t state);
-extern int s3c24xx_irq_resume(struct sys_device *dev);
-#else
-#define s3c24xx_irq_suspend NULL
-#define s3c24xx_irq_resume  NULL
-#endif

arch/arm/plat-s3c24xx/irq-pm.c

@@ -0,0 +1,95 @@
+/* linux/arch/arm/plat-s3c24xx/irq-om.c
+ *
+ * Copyright (c) 2003,2004 Simtec Electronics
+ *	Ben Dooks <ben@simtec.co.uk>
+ *	http://armlinux.simtec.co.uk/
+ *
+ * S3C24XX - IRQ PM code
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/sysdev.h>
+
+#include <plat/cpu.h>
+#include <plat/pm.h>
+#include <plat/irq.h>
+
+/* state for IRQs over sleep */
+
+/* default is to allow for EINT0..EINT15, and IRQ_RTC as wakeup sources
+ *
+ * set bit to 1 in allow bitfield to enable the wakeup settings on it
+*/
+
+unsigned long s3c_irqwake_intallow	= 1L << (IRQ_RTC - IRQ_EINT0) | 0xfL;
+unsigned long s3c_irqwake_eintallow	= 0x0000fff0L;
+
+int s3c_irq_wake(unsigned int irqno, unsigned int state)
+{
+	unsigned long irqbit = 1 << (irqno - IRQ_EINT0);
+
+	if (!(s3c_irqwake_intallow & irqbit))
+		return -ENOENT;
+
+	printk(KERN_INFO "wake %s for irq %d\n",
+	       state ? "enabled" : "disabled", irqno);
+
+	if (!state)
+		s3c_irqwake_intmask |= irqbit;
+	else
+		s3c_irqwake_intmask &= ~irqbit;
+
+	return 0;
+}
+
+static struct sleep_save irq_save[] = {
+	SAVE_ITEM(S3C2410_INTMSK),
+	SAVE_ITEM(S3C2410_INTSUBMSK),
+};
+
+/* the extint values move between the s3c2410/s3c2440 and the s3c2412
+ * so we use an array to hold them, and to calculate the address of
+ * the register at run-time
+*/
+
+static unsigned long save_extint[3];
+static unsigned long save_eintflt[4];
+static unsigned long save_eintmask;
+
+int s3c24xx_irq_suspend(struct sys_device *dev, pm_message_t state)
+{
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(save_extint); i++)
+		save_extint[i] = __raw_readl(S3C24XX_EXTINT0 + (i*4));
+
+	for (i = 0; i < ARRAY_SIZE(save_eintflt); i++)
+		save_eintflt[i] = __raw_readl(S3C24XX_EINFLT0 + (i*4));
+
+	s3c_pm_do_save(irq_save, ARRAY_SIZE(irq_save));
+	save_eintmask = __raw_readl(S3C24XX_EINTMASK);
+
+	return 0;
+}
+
+int s3c24xx_irq_resume(struct sys_device *dev)
+{
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(save_extint); i++)
+		__raw_writel(save_extint[i], S3C24XX_EXTINT0 + (i*4));
+
+	for (i = 0; i < ARRAY_SIZE(save_eintflt); i++)
+		__raw_writel(save_eintflt[i], S3C24XX_EINFLT0 + (i*4));
+
+	s3c_pm_do_restore(irq_save, ARRAY_SIZE(irq_save));
+	__raw_writel(save_eintmask, S3C24XX_EINTMASK);
+
+	return 0;
+}

arch/arm/plat-s3c24xx/irq.c

@@ -1,6 +1,6 @@
 /* linux/arch/arm/plat-s3c24xx/irq.c
  *
- * Copyright (c) 2003,2004 Simtec Electronics
+ * Copyright (c) 2003,2004 Simtec Electronics 
  *	Ben Dooks <ben@simtec.co.uk>
  *
  * This program is free software; you can redistribute it and/or modify
@@ -16,38 +16,6 @@
  * 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
- *
- * Changelog:
- *
- *   22-Jul-2004  Ben Dooks <ben@simtec.co.uk>
- *                Fixed compile warnings
- *
- *   22-Jul-2004  Roc Wu <cooloney@yahoo.com.cn>
- *                Fixed s3c_extirq_type
- *
- *   21-Jul-2004  Arnaud Patard (Rtp) <arnaud.patard@rtp-net.org>
- *                Addition of ADC/TC demux
- *
- *   04-Oct-2004  Klaus Fetscher <k.fetscher@fetron.de>
- *		  Fix for set_irq_type() on low EINT numbers
- *
- *   05-Oct-2004  Ben Dooks <ben@simtec.co.uk>
- *		  Tidy up KF's patch and sort out new release
- *
- *   05-Oct-2004  Ben Dooks <ben@simtec.co.uk>
- *		  Add support for power management controls
- *
- *   04-Nov-2004  Ben Dooks
- *		  Fix standard IRQ wake for EINT0..4 and RTC
- *
- *   22-Feb-2005  Ben Dooks
- *		  Fixed edge-triggering on ADC IRQ
- *
- *   28-Jun-2005  Ben Dooks
- *		  Mark IRQ_LCD valid
- *
- *   25-Jul-2005  Ben Dooks
- *		  Split the S3C2440 IRQ code to separate file
 */
 
 #include <linux/init.h>
@@ -55,81 +23,16 @@
 #include <linux/interrupt.h>
 #include <linux/ioport.h>
 #include <linux/sysdev.h>
-#include <linux/io.h>
 
-#include <mach/hardware.h>
 #include <asm/irq.h>
-
 #include <asm/mach/irq.h>
 
 #include <plat/regs-irqtype.h>
-#include <mach/regs-irq.h>
-#include <mach/regs-gpio.h>
 
 #include <plat/cpu.h>
 #include <plat/pm.h>
 #include <plat/irq.h>
 
-/* wakeup irq control */
-
-#ifdef CONFIG_PM
-
-/* state for IRQs over sleep */
-
-/* default is to allow for EINT0..EINT15, and IRQ_RTC as wakeup sources
- *
- * set bit to 1 in allow bitfield to enable the wakeup settings on it
-*/
-
-unsigned long s3c_irqwake_intallow	= 1L << (IRQ_RTC - IRQ_EINT0) | 0xfL;
-unsigned long s3c_irqwake_intmask	= 0xffffffffL;
-unsigned long s3c_irqwake_eintallow	= 0x0000fff0L;
-unsigned long s3c_irqwake_eintmask	= 0xffffffffL;
-
-int
-s3c_irq_wake(unsigned int irqno, unsigned int state)
-{
-	unsigned long irqbit = 1 << (irqno - IRQ_EINT0);
-
-	if (!(s3c_irqwake_intallow & irqbit))
-		return -ENOENT;
-
-	printk(KERN_INFO "wake %s for irq %d\n",
-	       state ? "enabled" : "disabled", irqno);
-
-	if (!state)
-		s3c_irqwake_intmask |= irqbit;
-	else
-		s3c_irqwake_intmask &= ~irqbit;
-
-	return 0;
-}
-
-static int
-s3c_irqext_wake(unsigned int irqno, unsigned int state)
-{
-	unsigned long bit = 1L << (irqno - EXTINT_OFF);
-
-	if (!(s3c_irqwake_eintallow & bit))
-		return -ENOENT;
-
-	printk(KERN_INFO "wake %s for irq %d\n",
-	       state ? "enabled" : "disabled", irqno);
-
-	if (!state)
-		s3c_irqwake_eintmask |= bit;
-	else
-		s3c_irqwake_eintmask &= ~bit;
-
-	return 0;
-}
-
-#else
-#define s3c_irqext_wake NULL
-#define s3c_irq_wake NULL
-#endif
-
-
 static void
 s3c_irq_mask(unsigned int irqno)
 {
@@ -590,59 +493,6 @@ s3c_irq_demux_extint4t7(unsigned int irq,
 	}
 }
 
-#ifdef CONFIG_PM
-
-static struct sleep_save irq_save[] = {
-	SAVE_ITEM(S3C2410_INTMSK),
-	SAVE_ITEM(S3C2410_INTSUBMSK),
-};
-
-/* the extint values move between the s3c2410/s3c2440 and the s3c2412
- * so we use an array to hold them, and to calculate the address of
- * the register at run-time
-*/
-
-static unsigned long save_extint[3];
-static unsigned long save_eintflt[4];
-static unsigned long save_eintmask;
-
-int s3c24xx_irq_suspend(struct sys_device *dev, pm_message_t state)
-{
-	unsigned int i;
-
-	for (i = 0; i < ARRAY_SIZE(save_extint); i++)
-		save_extint[i] = __raw_readl(S3C24XX_EXTINT0 + (i*4));
-
-	for (i = 0; i < ARRAY_SIZE(save_eintflt); i++)
-		save_eintflt[i] = __raw_readl(S3C24XX_EINFLT0 + (i*4));
-
-	s3c2410_pm_do_save(irq_save, ARRAY_SIZE(irq_save));
-	save_eintmask = __raw_readl(S3C24XX_EINTMASK);
-
-	return 0;
-}
-
-int s3c24xx_irq_resume(struct sys_device *dev)
-{
-	unsigned int i;
-
-	for (i = 0; i < ARRAY_SIZE(save_extint); i++)
-		__raw_writel(save_extint[i], S3C24XX_EXTINT0 + (i*4));
-
-	for (i = 0; i < ARRAY_SIZE(save_eintflt); i++)
-		__raw_writel(save_eintflt[i], S3C24XX_EINFLT0 + (i*4));
-
-	s3c2410_pm_do_restore(irq_save, ARRAY_SIZE(irq_save));
-	__raw_writel(save_eintmask, S3C24XX_EINTMASK);
-
-	return 0;
-}
-
-#else
-#define s3c24xx_irq_suspend NULL
-#define s3c24xx_irq_resume  NULL
-#endif
-
 /* s3c24xx_init_irq
  *
  * Initialise S3C2410 IRQ system

arch/arm/plat-s3c24xx/pm-simtec.c

@@ -61,7 +61,7 @@ static __init int pm_simtec_init(void)
 
 	__raw_writel(gstatus4, S3C2410_GSTATUS4);
 
-	return s3c2410_pm_init();
+	return s3c_pm_init();
 }
 
 arch_initcall(pm_simtec_init);

arch/arm/plat-s3c24xx/pm.c

@@ -31,14 +31,9 @@
 #include <linux/errno.h>
 #include <linux/time.h>
 #include <linux/interrupt.h>
-#include <linux/crc32.h>
-#include <linux/ioport.h>
 #include <linux/serial_core.h>
 #include <linux/io.h>
 
-#include <asm/cacheflush.h>
-#include <mach/hardware.h>
-
 #include <plat/regs-serial.h>
 #include <mach/regs-clock.h>
 #include <mach/regs-gpio.h>
@@ -49,10 +44,6 @@
 
 #include <plat/pm.h>
 
-/* for external use */
-
-unsigned long s3c_pm_flags;
-
 #define PFX "s3c24xx-pm: "
 
 static struct sleep_save core_save[] = {
@@ -120,328 +111,14 @@ static struct sleep_save misc_save[] = {
 	SAVE_ITEM(S3C2410_DCLKCON),
 };
 
-#ifdef CONFIG_S3C2410_PM_DEBUG
-
-#define SAVE_UART(va) \
-	SAVE_ITEM((va) + S3C2410_ULCON), \
-	SAVE_ITEM((va) + S3C2410_UCON), \
-	SAVE_ITEM((va) + S3C2410_UFCON), \
-	SAVE_ITEM((va) + S3C2410_UMCON), \
-	SAVE_ITEM((va) + S3C2410_UBRDIV)
-
-static struct sleep_save uart_save[] = {
-	SAVE_UART(S3C24XX_VA_UART0),
-	SAVE_UART(S3C24XX_VA_UART1),
-#ifndef CONFIG_CPU_S3C2400
-	SAVE_UART(S3C24XX_VA_UART2),
-#endif
-};
-
-/* debug
- *
- * we send the debug to printascii() to allow it to be seen if the
- * system never wakes up from the sleep
-*/
-
-extern void printascii(const char *);
-
-void pm_dbg(const char *fmt, ...)
-{
-	va_list va;
-	char buff[256];
-
-	va_start(va, fmt);
-	vsprintf(buff, fmt, va);
-	va_end(va);
-
-	printascii(buff);
-}
-
-static void s3c2410_pm_debug_init(void)
-{
-	unsigned long tmp = __raw_readl(S3C2410_CLKCON);
-
-	/* re-start uart clocks */
-	tmp |= S3C2410_CLKCON_UART0;
-	tmp |= S3C2410_CLKCON_UART1;
-	tmp |= S3C2410_CLKCON_UART2;
-
-	__raw_writel(tmp, S3C2410_CLKCON);
-	udelay(10);
-}
-
-#define DBG(fmt...) pm_dbg(fmt)
-#else
-#define DBG(fmt...) printk(KERN_DEBUG fmt)
-
-#define s3c2410_pm_debug_init() do { } while(0)
-
-static struct sleep_save uart_save[] = {};
-#endif
-
-#if defined(CONFIG_S3C2410_PM_CHECK) && CONFIG_S3C2410_PM_CHECK_CHUNKSIZE != 0
-
-/* suspend checking code...
- *
- * this next area does a set of crc checks over all the installed
- * memory, so the system can verify if the resume was ok.
- *
- * CONFIG_S3C2410_PM_CHECK_CHUNKSIZE defines the block-size for the CRC,
- * increasing it will mean that the area corrupted will be less easy to spot,
- * and reducing the size will cause the CRC save area to grow
-*/
-
-#define CHECK_CHUNKSIZE (CONFIG_S3C2410_PM_CHECK_CHUNKSIZE * 1024)
-
-static u32 crc_size;	/* size needed for the crc block */
-static u32 *crcs;	/* allocated over suspend/resume */
-
-typedef u32 *(run_fn_t)(struct resource *ptr, u32 *arg);
-
-/* s3c2410_pm_run_res
- *
- * go thorugh the given resource list, and look for system ram
-*/
-
-static void s3c2410_pm_run_res(struct resource *ptr, run_fn_t fn, u32 *arg)
-{
-	while (ptr != NULL) {
-		if (ptr->child != NULL)
-			s3c2410_pm_run_res(ptr->child, fn, arg);
-
-		if ((ptr->flags & IORESOURCE_MEM) &&
-		    strcmp(ptr->name, "System RAM") == 0) {
-			DBG("Found system RAM at %08lx..%08lx\n",
-			    ptr->start, ptr->end);
-			arg = (fn)(ptr, arg);
-		}
-
-		ptr = ptr->sibling;
-	}
-}
-
-static void s3c2410_pm_run_sysram(run_fn_t fn, u32 *arg)
-{
-	s3c2410_pm_run_res(&iomem_resource, fn, arg);
-}
-
-static u32 *s3c2410_pm_countram(struct resource *res, u32 *val)
-{
-	u32 size = (u32)(res->end - res->start)+1;
-
-	size += CHECK_CHUNKSIZE-1;
-	size /= CHECK_CHUNKSIZE;
-
-	DBG("Area %08lx..%08lx, %d blocks\n", res->start, res->end, size);
-
-	*val += size * sizeof(u32);
-	return val;
-}
-
-/* s3c2410_pm_prepare_check
- *
- * prepare the necessary information for creating the CRCs. This
- * must be done before the final save, as it will require memory
- * allocating, and thus touching bits of the kernel we do not
- * know about.
-*/
-
-static void s3c2410_pm_check_prepare(void)
-{
-	crc_size = 0;
-
-	s3c2410_pm_run_sysram(s3c2410_pm_countram, &crc_size);
-
-	DBG("s3c2410_pm_prepare_check: %u checks needed\n", crc_size);
-
-	crcs = kmalloc(crc_size+4, GFP_KERNEL);
-	if (crcs == NULL)
-		printk(KERN_ERR "Cannot allocated CRC save area\n");
-}
-
-static u32 *s3c2410_pm_makecheck(struct resource *res, u32 *val)
-{
-	unsigned long addr, left;
-
-	for (addr = res->start; addr < res->end;
-	     addr += CHECK_CHUNKSIZE) {
-		left = res->end - addr;
-
-		if (left > CHECK_CHUNKSIZE)
-			left = CHECK_CHUNKSIZE;
-
-		*val = crc32_le(~0, phys_to_virt(addr), left);
-		val++;
-	}
-
-	return val;
-}
-
-/* s3c2410_pm_check_store
- *
- * compute the CRC values for the memory blocks before the final
- * sleep.
-*/
-
-static void s3c2410_pm_check_store(void)
-{
-	if (crcs != NULL)
-		s3c2410_pm_run_sysram(s3c2410_pm_makecheck, crcs);
-}
-
-/* in_region
- *
- * return TRUE if the area defined by ptr..ptr+size contatins the
- * what..what+whatsz
-*/
-
-static inline int in_region(void *ptr, int size, void *what, size_t whatsz)
-{
-	if ((what+whatsz) < ptr)
-		return 0;
-
-	if (what > (ptr+size))
-		return 0;
-
-	return 1;
-}
-
-static u32 *s3c2410_pm_runcheck(struct resource *res, u32 *val)
-{
-	void *save_at = phys_to_virt(s3c2410_sleep_save_phys);
-	unsigned long addr;
-	unsigned long left;
-	void *ptr;
-	u32 calc;
-
-	for (addr = res->start; addr < res->end;
-	     addr += CHECK_CHUNKSIZE) {
-		left = res->end - addr;
-
-		if (left > CHECK_CHUNKSIZE)
-			left = CHECK_CHUNKSIZE;
-
-		ptr = phys_to_virt(addr);
-
-		if (in_region(ptr, left, crcs, crc_size)) {
-			DBG("skipping %08lx, has crc block in\n", addr);
-			goto skip_check;
-		}
-
-		if (in_region(ptr, left, save_at, 32*4 )) {
-			DBG("skipping %08lx, has save block in\n", addr);
-			goto skip_check;
-		}
-
-		/* calculate and check the checksum */
-
-		calc = crc32_le(~0, ptr, left);
-		if (calc != *val) {
-			printk(KERN_ERR PFX "Restore CRC error at "
-			       "%08lx (%08x vs %08x)\n", addr, calc, *val);
-
-			DBG("Restore CRC error at %08lx (%08x vs %08x)\n",
-			    addr, calc, *val);
-		}
-
-	skip_check:
-		val++;
-	}
-
-	return val;
-}
-
-/* s3c2410_pm_check_restore
- *
- * check the CRCs after the restore event and free the memory used
- * to hold them
-*/
-
-static void s3c2410_pm_check_restore(void)
-{
-	if (crcs != NULL) {
-		s3c2410_pm_run_sysram(s3c2410_pm_runcheck, crcs);
-		kfree(crcs);
-		crcs = NULL;
-	}
-}
-
-#else
-
-#define s3c2410_pm_check_prepare() do { } while(0)
-#define s3c2410_pm_check_restore() do { } while(0)
-#define s3c2410_pm_check_store()   do { } while(0)
-#endif
-
-/* helper functions to save and restore register state */
-
-void s3c2410_pm_do_save(struct sleep_save *ptr, int count)
-{
-	for (; count > 0; count--, ptr++) {
-		ptr->val = __raw_readl(ptr->reg);
-		DBG("saved %p value %08lx\n", ptr->reg, ptr->val);
-	}
-}
-
-/* s3c2410_pm_do_restore
- *
- * restore the system from the given list of saved registers
- *
- * Note, we do not use DBG() in here, as the system may not have
- * restore the UARTs state yet
-*/
-
-void s3c2410_pm_do_restore(struct sleep_save *ptr, int count)
-{
-	for (; count > 0; count--, ptr++) {
-		printk(KERN_DEBUG "restore %p (restore %08lx, was %08x)\n",
-		       ptr->reg, ptr->val, __raw_readl(ptr->reg));
-
-		__raw_writel(ptr->val, ptr->reg);
-	}
-}
-
-/* s3c2410_pm_do_restore_core
- *
- * similar to s3c2410_pm_do_restore_core
- *
- * WARNING: Do not put any debug in here that may effect memory or use
- * peripherals, as things may be changing!
-*/
-
-static void s3c2410_pm_do_restore_core(struct sleep_save *ptr, int count)
-{
-	for (; count > 0; count--, ptr++) {
-		__raw_writel(ptr->val, ptr->reg);
-	}
-}
 
-/* s3c2410_pm_show_resume_irqs
- *
- * print any IRQs asserted at resume time (ie, we woke from)
-*/
-
-static void s3c2410_pm_show_resume_irqs(int start, unsigned long which,
-					unsigned long mask)
-{
-	int i;
-
-	which &= ~mask;
-
-	for (i = 0; i <= 31; i++) {
-		if ((which) & (1L<<i)) {
-			DBG("IRQ %d asserted at resume\n", start+i);
-		}
-	}
-}
-
-/* s3c2410_pm_check_resume_pin
+/* s3c_pm_check_resume_pin
  *
  * check to see if the pin is configured correctly for sleep mode, and
  * make any necessary adjustments if it is not
 */
 
-static void s3c2410_pm_check_resume_pin(unsigned int pin, unsigned int irqoffs)
+static void s3c_pm_check_resume_pin(unsigned int pin, unsigned int irqoffs)
 {
 	unsigned long irqstate;
 	unsigned long pinstate;
@@ -456,21 +133,21 @@ static void s3c2410_pm_check_resume_pin(unsigned int pin, unsigned int irqoffs)
 
 	if (!irqstate) {
 		if (pinstate == S3C2410_GPIO_IRQ)
-			DBG("Leaving IRQ %d (pin %d) enabled\n", irq, pin);
+			S3C_PMDBG("Leaving IRQ %d (pin %d) enabled\n", irq, pin);
 	} else {
 		if (pinstate == S3C2410_GPIO_IRQ) {
-			DBG("Disabling IRQ %d (pin %d)\n", irq, pin);
+			S3C_PMDBG("Disabling IRQ %d (pin %d)\n", irq, pin);
 			s3c2410_gpio_cfgpin(pin, S3C2410_GPIO_INPUT);
 		}
 	}
 }
 
-/* s3c2410_pm_configure_extint
+/* s3c_pm_configure_extint
  *
  * configure all external interrupt pins
 */
 
-static void s3c2410_pm_configure_extint(void)
+void s3c_pm_configure_extint(void)
 {
 	int pin;
 
@@ -480,11 +157,11 @@ static void s3c2410_pm_configure_extint(void)
 	*/
 
 	for (pin = S3C2410_GPF0; pin <= S3C2410_GPF7; pin++) {
-		s3c2410_pm_check_resume_pin(pin, pin - S3C2410_GPF0);
+		s3c_pm_check_resume_pin(pin, pin - S3C2410_GPF0);
 	}
 
 	for (pin = S3C2410_GPG0; pin <= S3C2410_GPG7; pin++) {
-		s3c2410_pm_check_resume_pin(pin, (pin - S3C2410_GPG0)+8);
+		s3c_pm_check_resume_pin(pin, (pin - S3C2410_GPG0)+8);
 	}
 }
 
@@ -494,12 +171,12 @@ static void s3c2410_pm_configure_extint(void)
 #define OFFS_DAT	(S3C2410_GPADAT - S3C2410_GPACON)
 #define OFFS_UP		(S3C2410_GPBUP  - S3C2410_GPBCON)
 
-/* s3c2410_pm_save_gpios()
+/* s3c_pm_save_gpios()
  *
  * Save the state of the GPIOs
  */
 
-static void s3c2410_pm_save_gpios(void)
+void s3c_pm_save_gpios(void)
 {
 	struct gpio_sleep *gps = gpio_save;
 	unsigned int gpio;
@@ -538,7 +215,10 @@ static inline int is_out(unsigned long con)
 	return con == 1;
 }
 
-/* s3c2410_pm_restore_gpio()
+/**
+ * s3c2410_pm_restore_gpio() - restore the given GPIO bank
+ * @index: The number of the GPIO bank being resumed.
+ * @gps: The sleep confgiuration for the bank.
  *
  * Restore one of the GPIO banks that was saved during suspend. This is
  * not as simple as once thought, due to the possibility of glitches
@@ -646,8 +326,8 @@ static void s3c2410_pm_restore_gpio(int index, struct gpio_sleep *gps)
 		__raw_writel(gps->gpup, base + OFFS_UP);
 	}
 
-	DBG("GPIO[%d] CON %08lx => %08lx, DAT %08lx => %08lx\n",
-	    index, old_gpcon, gps_gpcon, old_gpdat, gps_gpdat);
+	S3C_PMDBG("GPIO[%d] CON %08lx => %08lx, DAT %08lx => %08lx\n",
+		  index, old_gpcon, gps_gpcon, old_gpdat, gps_gpdat);
 }
 
 
@@ -656,7 +336,7 @@ static void s3c2410_pm_restore_gpio(int index, struct gpio_sleep *gps)
  * Restore the state of the GPIOs
  */
 
-static void s3c2410_pm_restore_gpios(void)
+void s3c_pm_restore_gpios(void)
 {
 	struct gpio_sleep *gps = gpio_save;
 	int gpio;
@@ -666,150 +346,15 @@ static void s3c2410_pm_restore_gpios(void)
 	}
 }
 
-void (*pm_cpu_prep)(void);
-void (*pm_cpu_sleep)(void);
-
-#define any_allowed(mask, allow) (((mask) & (allow)) != (allow))
-
-/* s3c2410_pm_enter
- *
- * central control for sleep/resume process
-*/
-
-static int s3c2410_pm_enter(suspend_state_t state)
+void s3c_pm_restore_core(void)
 {
-	unsigned long regs_save[16];
-
-	/* ensure the debug is initialised (if enabled) */
-
-	s3c2410_pm_debug_init();
-
-	DBG("s3c2410_pm_enter(%d)\n", state);
-
-	if (pm_cpu_prep == NULL || pm_cpu_sleep == NULL) {
-		printk(KERN_ERR PFX "error: no cpu sleep functions set\n");
-		return -EINVAL;
-	}
-
-	/* check if we have anything to wake-up with... bad things seem
-	 * to happen if you suspend with no wakeup (system will often
-	 * require a full power-cycle)
-	*/
-
-	if (!any_allowed(s3c_irqwake_intmask, s3c_irqwake_intallow) &&
-	    !any_allowed(s3c_irqwake_eintmask, s3c_irqwake_eintallow)) {
-		printk(KERN_ERR PFX "No sources enabled for wake-up!\n");
-		printk(KERN_ERR PFX "Aborting sleep\n");
-		return -EINVAL;
-	}
-
-	/* prepare check area if configured */
-
-	s3c2410_pm_check_prepare();
-
-	/* store the physical address of the register recovery block */
-
-	s3c2410_sleep_save_phys = virt_to_phys(regs_save);
-
-	DBG("s3c2410_sleep_save_phys=0x%08lx\n", s3c2410_sleep_save_phys);
-
-	/* save all necessary core registers not covered by the drivers */
-
-	s3c2410_pm_save_gpios();
-	s3c2410_pm_do_save(misc_save, ARRAY_SIZE(misc_save));
-	s3c2410_pm_do_save(core_save, ARRAY_SIZE(core_save));
-	s3c2410_pm_do_save(uart_save, ARRAY_SIZE(uart_save));
-
-	/* set the irq configuration for wake */
-
-	s3c2410_pm_configure_extint();
-
-	DBG("sleep: irq wakeup masks: %08lx,%08lx\n",
-	    s3c_irqwake_intmask, s3c_irqwake_eintmask);
-
-	__raw_writel(s3c_irqwake_intmask, S3C2410_INTMSK);
-	__raw_writel(s3c_irqwake_eintmask, S3C2410_EINTMASK);
-
-	/* ack any outstanding external interrupts before we go to sleep */
-
-	__raw_writel(__raw_readl(S3C2410_EINTPEND), S3C2410_EINTPEND);
-	__raw_writel(__raw_readl(S3C2410_INTPND), S3C2410_INTPND);
-	__raw_writel(__raw_readl(S3C2410_SRCPND), S3C2410_SRCPND);
-
-	/* call cpu specific preparation */
-
-	pm_cpu_prep();
-
-	/* flush cache back to ram */
-
-	flush_cache_all();
-
-	s3c2410_pm_check_store();
-
-	/* send the cpu to sleep... */
-
-	__raw_writel(0x00, S3C2410_CLKCON);  /* turn off clocks over sleep */
-
-	/* s3c2410_cpu_save will also act as our return point from when
-	 * we resume as it saves its own register state, so use the return
-	 * code to differentiate return from save and return from sleep */
-
-	if (s3c2410_cpu_save(regs_save) == 0) {
-		flush_cache_all();
-		pm_cpu_sleep();
-	}
-
-	/* restore the cpu state */
-
-	cpu_init();
-
-	/* restore the system state */
-
-	s3c2410_pm_do_restore_core(core_save, ARRAY_SIZE(core_save));
-	s3c2410_pm_do_restore(misc_save, ARRAY_SIZE(misc_save));
-	s3c2410_pm_do_restore(uart_save, ARRAY_SIZE(uart_save));
-	s3c2410_pm_restore_gpios();
-
-	s3c2410_pm_debug_init();
-
-	/* check what irq (if any) restored the system */
-
-	DBG("post sleep: IRQs 0x%08x, 0x%08x\n",
-	    __raw_readl(S3C2410_SRCPND),
-	    __raw_readl(S3C2410_EINTPEND));
-
-	s3c2410_pm_show_resume_irqs(IRQ_EINT0, __raw_readl(S3C2410_SRCPND),
-				    s3c_irqwake_intmask);
-
-	s3c2410_pm_show_resume_irqs(IRQ_EINT4-4, __raw_readl(S3C2410_EINTPEND),
-				    s3c_irqwake_eintmask);
-
-	DBG("post sleep, preparing to return\n");
-
-	s3c2410_pm_check_restore();
-
-	/* ok, let's return from sleep */
-
-	DBG("S3C2410 PM Resume (post-restore)\n");
-	return 0;
+	s3c_pm_do_restore_core(core_save, ARRAY_SIZE(core_save));
+	s3c_pm_do_restore(misc_save, ARRAY_SIZE(misc_save));
 }
 
-static struct platform_suspend_ops s3c2410_pm_ops = {
-	.enter		= s3c2410_pm_enter,
-	.valid		= suspend_valid_only_mem,
-};
-
-/* s3c2410_pm_init
- *
- * Attach the power management functions. This should be called
- * from the board specific initialisation if the board supports
- * it.
-*/
-
-int __init s3c2410_pm_init(void)
+void s3c_pm_save_core(void)
 {
-	printk("S3C2410 Power Management, (c) 2004 Simtec Electronics\n");
-
-	suspend_set_ops(&s3c2410_pm_ops);
-	return 0;
+	s3c_pm_do_save(misc_save, ARRAY_SIZE(misc_save));
+	s3c_pm_do_save(core_save, ARRAY_SIZE(core_save));
 }
+

arch/arm/plat-s3c24xx/s3c244x.c

@@ -145,13 +145,13 @@ static struct sleep_save s3c244x_sleep[] = {
 
 static int s3c244x_suspend(struct sys_device *dev, pm_message_t state)
 {
-	s3c2410_pm_do_save(s3c244x_sleep, ARRAY_SIZE(s3c244x_sleep));
+	s3c_pm_do_save(s3c244x_sleep, ARRAY_SIZE(s3c244x_sleep));
 	return 0;
 }
 
 static int s3c244x_resume(struct sys_device *dev)
 {
-	s3c2410_pm_do_restore(s3c244x_sleep, ARRAY_SIZE(s3c244x_sleep));
+	s3c_pm_do_restore(s3c244x_sleep, ARRAY_SIZE(s3c244x_sleep));
 	return 0;
 }
 

arch/arm/plat-s3c24xx/sleep.S

@@ -41,25 +41,13 @@
 
 	.text
 
-	/* s3c2410_cpu_save
-	 *
-	 * save enough of the CPU state to allow us to re-start
-	 * pm.c code. as we store items like the sp/lr, we will
-	 * end up returning from this function when the cpu resumes
-	 * so the return value is set to mark this.
-	 *
-	 * This arangement means we avoid having to flush the cache
-	 * from this code.
+	/* s3c_cpu_save
 	 *
 	 * entry:
-	 *	r0 = pointer to save block
-	 *
-	 * exit:
-	 *	r0 = 0 => we stored everything
-	 *	     1 => resumed from sleep
+	 *	r0 = save address (virtual addr of s3c_sleep_save_phys)
 	*/
 
-ENTRY(s3c2410_cpu_save)
+ENTRY(s3c_cpu_save)
 	stmfd	sp!, { r4 - r12, lr }
 
 	@@ store co-processor registers
@@ -71,20 +59,25 @@ ENTRY(s3c2410_cpu_save)
 
 	stmia	r0, { r4 - r13 }
 
-	mov	r0, #0
-	ldmfd	sp, { r4 - r12, pc }
+	@@ write our state back to RAM
+	bl	s3c_pm_cb_flushcache
 
+	@@ jump to final code to send system to sleep
+	ldr	r0, =pm_cpu_sleep
+	@@ldr	pc, [ r0 ]
+	ldr	r0, [ r0 ]
+	mov	pc, r0
+	
 	@@ return to the caller, after having the MMU
 	@@ turned on, this restores the last bits from the
 	@@ stack
 resume_with_mmu:
-	mov	r0, #1
 	ldmfd	sp!, { r4 - r12, pc }
 
 	.ltorg
 
 	@@ the next bits sit in the .data segment, even though they
-	@@ happen to be code... the s3c2410_sleep_save_phys needs to be
+	@@ happen to be code... the s3c_sleep_save_phys needs to be
 	@@ accessed by the resume code before it can restore the MMU.
 	@@ This means that the variable has to be close enough for the
 	@@ code to read it... since the .text segment needs to be RO,
@@ -92,19 +85,19 @@ resume_with_mmu:
 
 	.data
 
-	.global	s3c2410_sleep_save_phys
-s3c2410_sleep_save_phys:
+	.global	s3c_sleep_save_phys
+s3c_sleep_save_phys:
 	.word	0
 
 
 	/* sleep magic, to allow the bootloader to check for an valid
 	 * image to resume to. Must be the first word before the
-	 * s3c2410_cpu_resume entry.
+	 * s3c_cpu_resume entry.
 	*/
 
 	.word	0x2bedf00d
 
-	/* s3c2410_cpu_resume
+	/* s3c_cpu_resume
 	 *
 	 * resume code entry for bootloader to call
 	 *
@@ -113,7 +106,7 @@ s3c2410_sleep_save_phys:
 	 * must not write to the code segment (code is read-only)
 	*/
 
-ENTRY(s3c2410_cpu_resume)
+ENTRY(s3c_cpu_resume)
 	mov	r0, #PSR_I_BIT | PSR_F_BIT | SVC_MODE
 	msr	cpsr_c, r0
 
@@ -145,7 +138,7 @@ ENTRY(s3c2410_cpu_resume)
 	mcr	p15, 0, r1, c8, c7, 0		@@ invalidate I & D TLBs
 	mcr	p15, 0, r1, c7, c7, 0		@@ invalidate I & D caches
 
-	ldr	r0, s3c2410_sleep_save_phys	@ address of restore block
+	ldr	r0, s3c_sleep_save_phys		@ address of restore block
 	ldmia	r0, { r4 - r13 }
 
 	mcr	p15, 0, r4, c13, c0, 0		@ PID