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

1 files changed, 24 insertions, 479 deletions

diff --git a/arch/arm/plat-s3c24xx/pm.c b/arch/arm/plat-s3c24xx/pm.c
index 34ef18e5b2a..062a29339a9 100644
--- a/arch/arm/plat-s3c24xx/pm.c
+++ b/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));
 }
+