ARM: EXYNOS: Support suspend and resume for EXYNOS5250

This patch adds function for suspend and resume of Exynos5250.
Signed-off-by: Jongpill Lee <boyko.lee@samsung.com>
[kgene.kim@samsung.com: re-worked on top of v3.4-rc7]
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/mach-exynos/Kconfig

@@ -62,6 +62,8 @@ config SOC_EXYNOS5250
 	default y
 	depends on ARCH_EXYNOS5
 	select SAMSUNG_DMADEV
+	select S5P_PM if PM
+	select S5P_SLEEP if PM
 	help
 	  Enable EXYNOS5250 SoC support
 

arch/arm/mach-exynos/include/mach/pm-core.h

@@ -33,7 +33,7 @@ static inline void s3c_pm_arch_prepare_irqs(void)
 	__raw_writel(tmp, S5P_WAKEUP_MASK);
 
 	__raw_writel(s3c_irqwake_intmask, S5P_WAKEUP_MASK);
-	__raw_writel(s3c_irqwake_eintmask, S5P_EINT_WAKEUP_MASK);
+	__raw_writel(s3c_irqwake_eintmask & 0xFFFFFFFE, S5P_EINT_WAKEUP_MASK);
 }
 
 static inline void s3c_pm_arch_stop_clocks(void)

arch/arm/mach-exynos/pm.c

@@ -77,7 +77,9 @@ static unsigned int save_arm_register[2];
 
 static int exynos_cpu_suspend(unsigned long arg)
 {
+#ifdef CONFIG_CACHE_L2X0
 	outer_flush_all();
+#endif
 
 	/* issue the standby signal into the pm unit. */
 	cpu_do_idle();
@@ -88,13 +90,19 @@ static int exynos_cpu_suspend(unsigned long arg)
 
 static void exynos_pm_prepare(void)
 {
-	u32 tmp;
+	unsigned int tmp;
 
 	s3c_pm_do_save(exynos_core_save, ARRAY_SIZE(exynos_core_save));
+
+	if (!soc_is_exynos5250()) {
 		s3c_pm_do_save(exynos4_epll_save, ARRAY_SIZE(exynos4_epll_save));
 		s3c_pm_do_save(exynos4_vpll_save, ARRAY_SIZE(exynos4_vpll_save));
-
-	tmp = __raw_readl(S5P_INFORM1);
+	} else {
+		/* Disable USE_RETENTION of JPEG_MEM_OPTION */
+		tmp = __raw_readl(EXYNOS5_JPEG_MEM_OPTION);
+		tmp &= ~EXYNOS5_OPTION_USE_RETENTION;
+		__raw_writel(tmp, EXYNOS5_JPEG_MEM_OPTION);
+	}
 
 	/* Set value of power down register for sleep mode */
 
@@ -107,6 +115,7 @@ static void exynos_pm_prepare(void)
 
 	/* Before enter central sequence mode, clock src register have to set */
 
+	if (!soc_is_exynos5250())
 		s3c_pm_do_restore_core(exynos4_set_clksrc, ARRAY_SIZE(exynos4_set_clksrc));
 
 	if (soc_is_exynos4210())
@@ -190,7 +199,7 @@ static void exynos4_restore_pll(void)
 }
 
 static struct subsys_interface exynos_pm_interface = {
-	.name		= "exynos4_pm",
+	.name		= "exynos_pm",
 	.subsys		= &exynos_subsys,
 	.add_dev	= exynos_pm_add,
 };
@@ -231,13 +240,12 @@ static int exynos_pm_suspend(void)
 	tmp &= ~S5P_CENTRAL_LOWPWR_CFG;
 	__raw_writel(tmp, S5P_CENTRAL_SEQ_CONFIGURATION);
 
-	if (soc_is_exynos4212() || soc_is_exynos4412()) {
-		tmp = __raw_readl(S5P_CENTRAL_SEQ_OPTION);
-		tmp &= ~(S5P_USE_STANDBYWFI_ISP_ARM |
-			 S5P_USE_STANDBYWFE_ISP_ARM);
+	/* Setting SEQ_OPTION register */
+
+	tmp = (S5P_USE_STANDBY_WFI0 | S5P_USE_STANDBY_WFE0);
 	__raw_writel(tmp, S5P_CENTRAL_SEQ_OPTION);
-	}
 
+	if (!soc_is_exynos5250()) {
 		/* Save Power control register */
 		asm ("mrc p15, 0, %0, c15, c0, 0"
 		     : "=r" (tmp) : : "cc");
@@ -247,6 +255,7 @@ static int exynos_pm_suspend(void)
 		asm ("mrc p15, 0, %0, c15, c0, 1"
 		     : "=r" (tmp) : : "cc");
 		save_arm_register[1] = tmp;
+	}
 
 	return 0;
 }
@@ -268,6 +277,7 @@ static void exynos_pm_resume(void)
 		/* No need to perform below restore code */
 		goto early_wakeup;
 	}
+	if (!soc_is_exynos5250()) {
 		/* Restore Power control register */
 		tmp = save_arm_register[0];
 		asm volatile ("mcr p15, 0, %0, c15, c0, 0"
@@ -279,6 +289,7 @@ static void exynos_pm_resume(void)
 		asm volatile ("mcr p15, 0, %0, c15, c0, 1"
 			      : : "r" (tmp)
 			      : "cc");
+	}
 
 	/* For release retention */
 
@@ -292,11 +303,13 @@ static void exynos_pm_resume(void)
 
 	s3c_pm_do_restore_core(exynos_core_save, ARRAY_SIZE(exynos_core_save));
 
+	if (!soc_is_exynos5250()) {
 		exynos4_restore_pll();
 
 #ifdef CONFIG_SMP
 		scu_enable(S5P_VA_SCU);
 #endif
+	}
 
 early_wakeup:
 	return;
@@ -307,9 +320,9 @@ static struct syscore_ops exynos_pm_syscore_ops = {
 	.resume		= exynos_pm_resume,
 };
 
-static __init int exynos4_pm_syscore_init(void)
+static __init int exynos_pm_syscore_init(void)
 {
 	register_syscore_ops(&exynos_pm_syscore_ops);
 	return 0;
 }
-arch_initcall(exynos4_pm_syscore_init);
+arch_initcall(exynos_pm_syscore_init);

arch/arm/mach-exynos/pmu.c

@@ -11,6 +11,7 @@
 
 #include <linux/io.h>
 #include <linux/kernel.h>
+#include <linux/bug.h>
 
 #include <mach/regs-clock.h>
 #include <mach/pmu.h>
@@ -314,10 +315,68 @@ static struct exynos_pmu_conf exynos5250_pmu_config[] = {
 	{ PMU_TABLE_END,},
 };
 
+void __iomem *exynos5_list_both_cnt_feed[] = {
+	EXYNOS5_ARM_CORE0_OPTION,
+	EXYNOS5_ARM_CORE1_OPTION,
+	EXYNOS5_ARM_COMMON_OPTION,
+	EXYNOS5_GSCL_OPTION,
+	EXYNOS5_ISP_OPTION,
+	EXYNOS5_MFC_OPTION,
+	EXYNOS5_G3D_OPTION,
+	EXYNOS5_DISP1_OPTION,
+	EXYNOS5_MAU_OPTION,
+	EXYNOS5_TOP_PWR_OPTION,
+	EXYNOS5_TOP_PWR_SYSMEM_OPTION,
+};
+
+void __iomem *exynos5_list_diable_wfi_wfe[] = {
+	EXYNOS5_ARM_CORE1_OPTION,
+	EXYNOS5_FSYS_ARM_OPTION,
+	EXYNOS5_ISP_ARM_OPTION,
+};
+
+static void exynos5_init_pmu(void)
+{
+	unsigned int i;
+	unsigned int tmp;
+
+	/*
+	 * Enable both SC_FEEDBACK and SC_COUNTER
+	 */
+	for (i = 0 ; i < ARRAY_SIZE(exynos5_list_both_cnt_feed) ; i++) {
+		tmp = __raw_readl(exynos5_list_both_cnt_feed[i]);
+		tmp |= (EXYNOS5_USE_SC_FEEDBACK |
+			EXYNOS5_USE_SC_COUNTER);
+		__raw_writel(tmp, exynos5_list_both_cnt_feed[i]);
+	}
+
+	/*
+	 * SKIP_DEACTIVATE_ACEACP_IN_PWDN_BITFIELD Enable
+	 * MANUAL_L2RSTDISABLE_CONTROL_BITFIELD Enable
+	 */
+	tmp = __raw_readl(EXYNOS5_ARM_COMMON_OPTION);
+	tmp |= (EXYNOS5_MANUAL_L2RSTDISABLE_CONTROL |
+		EXYNOS5_SKIP_DEACTIVATE_ACEACP_IN_PWDN);
+	__raw_writel(tmp, EXYNOS5_ARM_COMMON_OPTION);
+
+	/*
+	 * Disable WFI/WFE on XXX_OPTION
+	 */
+	for (i = 0 ; i < ARRAY_SIZE(exynos5_list_diable_wfi_wfe) ; i++) {
+		tmp = __raw_readl(exynos5_list_diable_wfi_wfe[i]);
+		tmp &= ~(EXYNOS5_OPTION_USE_STANDBYWFE |
+			 EXYNOS5_OPTION_USE_STANDBYWFI);
+		__raw_writel(tmp, exynos5_list_diable_wfi_wfe[i]);
+	}
+}
+
 void exynos_sys_powerdown_conf(enum sys_powerdown mode)
 {
 	unsigned int i;
 
+	if (soc_is_exynos5250())
+		exynos5_init_pmu();
+
 	for (i = 0; (exynos_pmu_config[i].reg != PMU_TABLE_END) ; i++)
 		__raw_writel(exynos_pmu_config[i].val[mode],
 				exynos_pmu_config[i].reg);