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>

4 files changed, 110 insertions, 36 deletions

diff --git a/arch/arm/mach-exynos/Kconfig b/arch/arm/mach-exynos/Kconfig
index 5893e2397da1..9ae68f47515f 100644
--- a/arch/arm/mach-exynos/Kconfig
+++ b/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
 
diff --git a/arch/arm/mach-exynos/include/mach/pm-core.h b/arch/arm/mach-exynos/include/mach/pm-core.h
index 9d8da51e35ca..a67ecfaf1216 100644
--- a/arch/arm/mach-exynos/include/mach/pm-core.h
+++ b/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)
diff --git a/arch/arm/mach-exynos/pm.c b/arch/arm/mach-exynos/pm.c
index 6aa3b47cee1c..c06c992943a1 100644
--- a/arch/arm/mach-exynos/pm.c
+++ b/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));
-        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);
+        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));
+        } 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 */
 
@@ -107,7 +115,8 @@ static void exynos_pm_prepare(void)
 
         /* Before enter central sequence mode, clock src register have to set */
 
-        s3c_pm_do_restore_core(exynos4_set_clksrc, ARRAY_SIZE(exynos4_set_clksrc));
+        if (!soc_is_exynos5250())
+                s3c_pm_do_restore_core(exynos4_set_clksrc, ARRAY_SIZE(exynos4_set_clksrc));
 
         if (soc_is_exynos4210())
                 s3c_pm_do_restore_core(exynos4210_set_clksrc, ARRAY_SIZE(exynos4210_set_clksrc));
@@ -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,
 };
@@ -231,22 +240,22 @@ 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);
-                __raw_writel(tmp, S5P_CENTRAL_SEQ_OPTION);
-        }
+        /* Setting SEQ_OPTION register */
 
-        /* Save Power control register */
-        asm ("mrc p15, 0, %0, c15, c0, 0"
-             : "=r" (tmp) : : "cc");
-        save_arm_register[0] = tmp;
+        tmp = (S5P_USE_STANDBY_WFI0 | S5P_USE_STANDBY_WFE0);
+        __raw_writel(tmp, S5P_CENTRAL_SEQ_OPTION);
 
-        /* Save Diagnostic register */
-        asm ("mrc p15, 0, %0, c15, c0, 1"
-             : "=r" (tmp) : : "cc");
-        save_arm_register[1] = tmp;
+        if (!soc_is_exynos5250()) {
+                /* Save Power control register */
+                asm ("mrc p15, 0, %0, c15, c0, 0"
+                     : "=r" (tmp) : : "cc");
+                save_arm_register[0] = tmp;
+
+                /* Save Diagnostic register */
+                asm ("mrc p15, 0, %0, c15, c0, 1"
+                     : "=r" (tmp) : : "cc");
+                save_arm_register[1] = tmp;
+        }
 
         return 0;
 }
@@ -268,17 +277,19 @@ static void exynos_pm_resume(void)
                 /* No need to perform below restore code */
                 goto early_wakeup;
         }
-        /* Restore Power control register */
-        tmp = save_arm_register[0];
-        asm volatile ("mcr p15, 0, %0, c15, c0, 0"
-                      : : "r" (tmp)
-                      : "cc");
-
-        /* Restore Diagnostic register */
-        tmp = save_arm_register[1];
-        asm volatile ("mcr p15, 0, %0, c15, c0, 1"
-                      : : "r" (tmp)
-                      : "cc");
+        if (!soc_is_exynos5250()) {
+                /* Restore Power control register */
+                tmp = save_arm_register[0];
+                asm volatile ("mcr p15, 0, %0, c15, c0, 0"
+                              : : "r" (tmp)
+                              : "cc");
+
+                /* Restore Diagnostic register */
+                tmp = save_arm_register[1];
+                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));
 
-        exynos4_restore_pll();
+        if (!soc_is_exynos5250()) {
+                exynos4_restore_pll();
 
 #ifdef CONFIG_SMP
-        scu_enable(S5P_VA_SCU);
+                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);
diff --git a/arch/arm/mach-exynos/pmu.c b/arch/arm/mach-exynos/pmu.c
index db4dc515e416..4aacb66f7161 100644
--- a/arch/arm/mach-exynos/pmu.c
+++ b/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);