ARM: S5PV210: Untie PM support from legacy code

This patch makes S5PV210 not rely on legacy suspend helpers in
plat-samsung and implements platform suspend logic locally, similarly to
Exynos.

Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

1 files changed, 89 insertions, 12 deletions

diff --git a/arch/arm/mach-s5pv210/pm.c b/arch/arm/mach-s5pv210/pm.c
index 00d1523284da..123163dd2ab0 100644
--- a/arch/arm/mach-s5pv210/pm.c
+++ b/arch/arm/mach-s5pv210/pm.c
@@ -1,6 +1,6 @@
 /* linux/arch/arm/mach-s5pv210/pm.c
  *
- * Copyright (c) 2010 Samsung Electronics Co., Ltd.
+ * Copyright (c) 2010-2014 Samsung Electronics Co., Ltd.
  *		http://www.samsung.com
  *
  * S5PV210 - Power Management support
@@ -19,17 +19,28 @@
 #include <linux/syscore_ops.h>
 #include <linux/io.h>
 
-#include <plat/cpu.h>
-#include <plat/pm.h>
+#include <asm/cacheflush.h>
+#include <asm/suspend.h>
+
+#include <plat/pm-common.h>
 
-#include <mach/regs-irq.h>
 #include <mach/regs-clock.h>
 
+#include "common.h"
+
 static struct sleep_save s5pv210_core_save[] = {
 	/* Clock ETC */
 	SAVE_ITEM(S5P_MDNIE_SEL),
 };
 
+/*
+ * VIC wake-up support (TODO)
+ */
+static u32 s5pv210_irqwake_intmask = 0xffffffff;
+
+/*
+ * Suspend helpers.
+ */
 static int s5pv210_cpu_suspend(unsigned long arg)
 {
 	unsigned long tmp;
@@ -54,8 +65,12 @@ static void s5pv210_pm_prepare(void)
 {
 	unsigned int tmp;
 
+	/* Set wake-up mask registers */
+	__raw_writel(exynos_get_eint_wake_mask(), S5P_EINT_WAKEUP_MASK);
+	__raw_writel(s5pv210_irqwake_intmask, S5P_WAKEUP_MASK);
+
 	/* ensure at least INFORM0 has the resume address */
-	__raw_writel(virt_to_phys(s3c_cpu_resume), S5P_INFORM0);
+	__raw_writel(virt_to_phys(s5pv210_cpu_resume), S5P_INFORM0);
 
 	tmp = __raw_readl(S5P_SLEEP_CFG);
 	tmp &= ~(S5P_SLEEP_CFG_OSC_EN | S5P_SLEEP_CFG_USBOSC_EN);
@@ -75,6 +90,70 @@ static void s5pv210_pm_prepare(void)
 	s3c_pm_do_save(s5pv210_core_save, ARRAY_SIZE(s5pv210_core_save));
 }
 
+/*
+ * Suspend operations.
+ */
+static int s5pv210_suspend_enter(suspend_state_t state)
+{
+	int ret;
+
+	s3c_pm_debug_init();
+
+	S3C_PMDBG("%s: suspending the system...\n", __func__);
+
+	S3C_PMDBG("%s: wakeup masks: %08x,%08x\n", __func__,
+			s5pv210_irqwake_intmask, exynos_get_eint_wake_mask());
+
+	if (s5pv210_irqwake_intmask == -1U
+	    && exynos_get_eint_wake_mask() == -1U) {
+		pr_err("%s: No wake-up sources!\n", __func__);
+		pr_err("%s: Aborting sleep\n", __func__);
+		return -EINVAL;
+	}
+
+	s3c_pm_save_uarts();
+	s5pv210_pm_prepare();
+	flush_cache_all();
+	s3c_pm_check_store();
+
+	ret = cpu_suspend(0, s5pv210_cpu_suspend);
+	if (ret)
+		return ret;
+
+	s3c_pm_restore_uarts();
+
+	S3C_PMDBG("%s: wakeup stat: %08x\n", __func__,
+			__raw_readl(S5P_WAKEUP_STAT));
+
+	s3c_pm_check_restore();
+
+	S3C_PMDBG("%s: resuming the system...\n", __func__);
+
+	return 0;
+}
+
+static int s5pv210_suspend_prepare(void)
+{
+	s3c_pm_check_prepare();
+
+	return 0;
+}
+
+static void s5pv210_suspend_finish(void)
+{
+	s3c_pm_check_cleanup();
+}
+
+static const struct platform_suspend_ops s5pv210_suspend_ops = {
+	.enter		= s5pv210_suspend_enter,
+	.prepare	= s5pv210_suspend_prepare,
+	.finish		= s5pv210_suspend_finish,
+	.valid		= suspend_valid_only_mem,
+};
+
+/*
+ * Syscore operations used to delay restore of certain registers.
+ */
 static void s5pv210_pm_resume(void)
 {
 	u32 tmp;
@@ -91,13 +170,11 @@ static struct syscore_ops s5pv210_pm_syscore_ops = {
 	.resume		= s5pv210_pm_resume,
 };
 
-static __init int s5pv210_pm_syscore_init(void)
+/*
+ * Initialization entry point.
+ */
+void __init s5pv210_pm_init(void)
 {
 	register_syscore_ops(&s5pv210_pm_syscore_ops);
-
-	pm_cpu_prep = s5pv210_pm_prepare;
-	pm_cpu_sleep = s5pv210_cpu_suspend;
-
-	return 0;
+	suspend_set_ops(&s5pv210_suspend_ops);
 }
-arch_initcall(s5pv210_pm_syscore_init);