[PATCH V2 2/3] ARM: EXYNOS4: Suspend to RAM Support
Kukjin Kim
kgene.kim at samsung.com
Wed Mar 9 23:51:13 EST 2011
From: Jaecheol Lee <jc.lee at samsung.com>
This patch adds support suspend to ram for EXYNOS4210.
As a note, this includes function of outer cache flush
because it is used before entering PM.
Signed-off-by: Jaecheol Lee <jc.lee at samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim at samsung.com>
---
arch/arm/mach-exynos4/Makefile | 1 +
arch/arm/mach-exynos4/include/mach/pm-core.h | 49 +++
arch/arm/mach-exynos4/pm.c | 420 ++++++++++++++++++++++++++
arch/arm/mach-exynos4/sleep.S | 76 +++++
arch/arm/plat-samsung/include/plat/cpu.h | 1 +
5 files changed, 547 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/mach-exynos4/include/mach/pm-core.h
create mode 100644 arch/arm/mach-exynos4/pm.c
create mode 100644 arch/arm/mach-exynos4/sleep.S
diff --git a/arch/arm/mach-exynos4/Makefile b/arch/arm/mach-exynos4/Makefile
index 45422cb..461ae57 100644
--- a/arch/arm/mach-exynos4/Makefile
+++ b/arch/arm/mach-exynos4/Makefile
@@ -14,6 +14,7 @@ obj- :=
obj-$(CONFIG_CPU_EXYNOS4210) += cpu.o init.o clock.o irq-combiner.o
obj-$(CONFIG_CPU_EXYNOS4210) += setup-i2c0.o time.o gpiolib.o irq-eint.o dma.o
+obj-$(CONFIG_PM) += pm.o sleep.o
obj-$(CONFIG_CPU_FREQ) += cpufreq.o
obj-$(CONFIG_SMP) += platsmp.o headsmp.o
diff --git a/arch/arm/mach-exynos4/include/mach/pm-core.h b/arch/arm/mach-exynos4/include/mach/pm-core.h
new file mode 100644
index 0000000..f26e46b
--- /dev/null
+++ b/arch/arm/mach-exynos4/include/mach/pm-core.h
@@ -0,0 +1,49 @@
+/* linux/arch/arm/mach-exynos4/include/mach/pm-core.h
+ *
+ * Copyright (c) 2011 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * Based on arch/arm/mach-s3c2410/include/mach/pm-core.h,
+ * Copyright 2008 Simtec Electronics
+ * Ben Dooks <ben at simtec.co.uk>
+ * http://armlinux.simtec.co.uk/
+ *
+ * EXYNOS4210 - PM core support for arch/arm/plat-s5p/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.
+*/
+#include <mach/regs-pmu.h>
+
+static inline void s3c_pm_debug_init_uart(void)
+{
+ /* nothing here yet */
+}
+
+static inline void s3c_pm_arch_prepare_irqs(void)
+{
+ unsigned int tmp;
+ tmp = __raw_readl(S5P_WAKEUP_MASK);
+ tmp &= ~(1 << 31);
+ __raw_writel(tmp, S5P_WAKEUP_MASK);
+
+ __raw_writel(s3c_irqwake_intmask, S5P_WAKEUP_MASK);
+ __raw_writel(s3c_irqwake_eintmask, S5P_EINT_WAKEUP_MASK);
+}
+
+static inline void s3c_pm_arch_stop_clocks(void)
+{
+ /* nothing here yet */
+}
+
+static inline void s3c_pm_arch_show_resume_irqs(void)
+{
+ /* nothing here yet */
+}
+
+static inline void s3c_pm_arch_update_uart(void __iomem *regs,
+ struct pm_uart_save *save)
+{
+ /* nothing here yet */
+}
diff --git a/arch/arm/mach-exynos4/pm.c b/arch/arm/mach-exynos4/pm.c
new file mode 100644
index 0000000..10d917d
--- /dev/null
+++ b/arch/arm/mach-exynos4/pm.c
@@ -0,0 +1,420 @@
+/* linux/arch/arm/mach-exynos4/pm.c
+ *
+ * Copyright (c) 2011 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * EXYNOS4210 - Power Management support
+ *
+ * Based on arch/arm/mach-s3c2410/pm.c
+ * Copyright (c) 2006 Simtec Electronics
+ * Ben Dooks <ben at 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.
+*/
+
+#include <linux/init.h>
+#include <linux/suspend.h>
+#include <linux/io.h>
+
+#include <asm/cacheflush.h>
+#include <asm/hardware/cache-l2x0.h>
+
+#include <plat/cpu.h>
+#include <plat/pm.h>
+
+#include <mach/regs-irq.h>
+#include <mach/regs-gpio.h>
+#include <mach/regs-clock.h>
+#include <mach/regs-pmu.h>
+#include <mach/pm-core.h>
+
+static struct sleep_save exynos4_sleep[] = {
+ { .reg = S5P_ARM_CORE0_LOWPWR , .val = 0x2, },
+ { .reg = S5P_DIS_IRQ_CORE0 , .val = 0x0, },
+ { .reg = S5P_DIS_IRQ_CENTRAL0 , .val = 0x0, },
+ { .reg = S5P_ARM_CORE1_LOWPWR , .val = 0x2, },
+ { .reg = S5P_DIS_IRQ_CORE1 , .val = 0x0, },
+ { .reg = S5P_DIS_IRQ_CENTRAL1 , .val = 0x0, },
+ { .reg = S5P_ARM_COMMON_LOWPWR , .val = 0x2, },
+ { .reg = S5P_L2_0_LOWPWR , .val = 0x3, },
+ { .reg = S5P_L2_1_LOWPWR , .val = 0x3, },
+ { .reg = S5P_CMU_ACLKSTOP_LOWPWR , .val = 0x0, },
+ { .reg = S5P_CMU_SCLKSTOP_LOWPWR , .val = 0x0, },
+ { .reg = S5P_CMU_RESET_LOWPWR , .val = 0x0, },
+ { .reg = S5P_APLL_SYSCLK_LOWPWR , .val = 0x0, },
+ { .reg = S5P_MPLL_SYSCLK_LOWPWR , .val = 0x0, },
+ { .reg = S5P_VPLL_SYSCLK_LOWPWR , .val = 0x0, },
+ { .reg = S5P_EPLL_SYSCLK_LOWPWR , .val = 0x0, },
+ { .reg = S5P_CMU_CLKSTOP_GPS_ALIVE_LOWPWR , .val = 0x0, },
+ { .reg = S5P_CMU_RESET_GPSALIVE_LOWPWR , .val = 0x0, },
+ { .reg = S5P_CMU_CLKSTOP_CAM_LOWPWR , .val = 0x0, },
+ { .reg = S5P_CMU_CLKSTOP_TV_LOWPWR , .val = 0x0, },
+ { .reg = S5P_CMU_CLKSTOP_MFC_LOWPWR , .val = 0x0, },
+ { .reg = S5P_CMU_CLKSTOP_G3D_LOWPWR , .val = 0x0, },
+ { .reg = S5P_CMU_CLKSTOP_LCD0_LOWPWR , .val = 0x0, },
+ { .reg = S5P_CMU_CLKSTOP_LCD1_LOWPWR , .val = 0x0, },
+ { .reg = S5P_CMU_CLKSTOP_MAUDIO_LOWPWR , .val = 0x0, },
+ { .reg = S5P_CMU_CLKSTOP_GPS_LOWPWR , .val = 0x0, },
+ { .reg = S5P_CMU_RESET_CAM_LOWPWR , .val = 0x0, },
+ { .reg = S5P_CMU_RESET_TV_LOWPWR , .val = 0x0, },
+ { .reg = S5P_CMU_RESET_MFC_LOWPWR , .val = 0x0, },
+ { .reg = S5P_CMU_RESET_G3D_LOWPWR , .val = 0x0, },
+ { .reg = S5P_CMU_RESET_LCD0_LOWPWR , .val = 0x0, },
+ { .reg = S5P_CMU_RESET_LCD1_LOWPWR , .val = 0x0, },
+ { .reg = S5P_CMU_RESET_MAUDIO_LOWPWR , .val = 0x0, },
+ { .reg = S5P_CMU_RESET_GPS_LOWPWR , .val = 0x0, },
+ { .reg = S5P_TOP_BUS_LOWPWR , .val = 0x0, },
+ { .reg = S5P_TOP_RETENTION_LOWPWR , .val = 0x1, },
+ { .reg = S5P_TOP_PWR_LOWPWR , .val = 0x3, },
+ { .reg = S5P_LOGIC_RESET_LOWPWR , .val = 0x0, },
+ { .reg = S5P_ONENAND_MEM_LOWPWR , .val = 0x0, },
+ { .reg = S5P_MODIMIF_MEM_LOWPWR , .val = 0x0, },
+ { .reg = S5P_G2D_ACP_MEM_LOWPWR , .val = 0x0, },
+ { .reg = S5P_USBOTG_MEM_LOWPWR , .val = 0x0, },
+ { .reg = S5P_HSMMC_MEM_LOWPWR , .val = 0x0, },
+ { .reg = S5P_CSSYS_MEM_LOWPWR , .val = 0x0, },
+ { .reg = S5P_SECSS_MEM_LOWPWR , .val = 0x0, },
+ { .reg = S5P_PCIE_MEM_LOWPWR , .val = 0x0, },
+ { .reg = S5P_SATA_MEM_LOWPWR , .val = 0x0, },
+ { .reg = S5P_PAD_RETENTION_DRAM_LOWPWR , .val = 0x0, },
+ { .reg = S5P_PAD_RETENTION_MAUDIO_LOWPWR , .val = 0x0, },
+ { .reg = S5P_PAD_RETENTION_GPIO_LOWPWR , .val = 0x0, },
+ { .reg = S5P_PAD_RETENTION_UART_LOWPWR , .val = 0x0, },
+ { .reg = S5P_PAD_RETENTION_MMCA_LOWPWR , .val = 0x0, },
+ { .reg = S5P_PAD_RETENTION_MMCB_LOWPWR , .val = 0x0, },
+ { .reg = S5P_PAD_RETENTION_EBIA_LOWPWR , .val = 0x0, },
+ { .reg = S5P_PAD_RETENTION_EBIB_LOWPWR , .val = 0x0, },
+ { .reg = S5P_PAD_RETENTION_ISOLATION_LOWPWR , .val = 0x0, },
+ { .reg = S5P_PAD_RETENTION_ALV_SEL_LOWPWR , .val = 0x0, },
+ { .reg = S5P_XUSBXTI_LOWPWR , .val = 0x0, },
+ { .reg = S5P_XXTI_LOWPWR , .val = 0x0, },
+ { .reg = S5P_EXT_REGULATOR_LOWPWR , .val = 0x0, },
+ { .reg = S5P_GPIO_MODE_LOWPWR , .val = 0x0, },
+ { .reg = S5P_GPIO_MODE_MAUDIO_LOWPWR , .val = 0x0, },
+ { .reg = S5P_CAM_LOWPWR , .val = 0x0, },
+ { .reg = S5P_TV_LOWPWR , .val = 0x0, },
+ { .reg = S5P_MFC_LOWPWR , .val = 0x0, },
+ { .reg = S5P_G3D_LOWPWR , .val = 0x0, },
+ { .reg = S5P_LCD0_LOWPWR , .val = 0x0, },
+ { .reg = S5P_LCD1_LOWPWR , .val = 0x0, },
+ { .reg = S5P_MAUDIO_LOWPWR , .val = 0x0, },
+ { .reg = S5P_GPS_LOWPWR , .val = 0x0, },
+ { .reg = S5P_GPS_ALIVE_LOWPWR , .val = 0x0, },
+};
+
+static struct sleep_save exynos4_set_clksrc[] = {
+ { .reg = S5P_CLKSRC_MASK_TOP , .val = 0x00000001, },
+ { .reg = S5P_CLKSRC_MASK_CAM , .val = 0x11111111, },
+ { .reg = S5P_CLKSRC_MASK_TV , .val = 0x00000111, },
+ { .reg = S5P_CLKSRC_MASK_LCD0 , .val = 0x00001111, },
+ { .reg = S5P_CLKSRC_MASK_LCD1 , .val = 0x00001111, },
+ { .reg = S5P_CLKSRC_MASK_MAUDIO , .val = 0x00000001, },
+ { .reg = S5P_CLKSRC_MASK_FSYS , .val = 0x01011111, },
+ { .reg = S5P_CLKSRC_MASK_PERIL0 , .val = 0x01111111, },
+ { .reg = S5P_CLKSRC_MASK_PERIL1 , .val = 0x01110111, },
+ { .reg = S5P_CLKSRC_MASK_DMC , .val = 0x00010000, },
+};
+
+static struct sleep_save exynos4_core_save[] = {
+ /* CMU side */
+ SAVE_ITEM(S5P_CLKDIV_LEFTBUS),
+ SAVE_ITEM(S5P_CLKGATE_IP_LEFTBUS),
+ SAVE_ITEM(S5P_CLKDIV_RIGHTBUS),
+ SAVE_ITEM(S5P_CLKGATE_IP_RIGHTBUS),
+ SAVE_ITEM(S5P_EPLL_CON0),
+ SAVE_ITEM(S5P_EPLL_CON1),
+ SAVE_ITEM(S5P_VPLL_CON0),
+ SAVE_ITEM(S5P_VPLL_CON1),
+ SAVE_ITEM(S5P_CLKSRC_TOP0),
+ SAVE_ITEM(S5P_CLKSRC_TOP1),
+ SAVE_ITEM(S5P_CLKSRC_CAM),
+ SAVE_ITEM(S5P_CLKSRC_MFC),
+ SAVE_ITEM(S5P_CLKSRC_IMAGE),
+ SAVE_ITEM(S5P_CLKSRC_LCD0),
+ SAVE_ITEM(S5P_CLKSRC_LCD1),
+ SAVE_ITEM(S5P_CLKSRC_MAUDIO),
+ SAVE_ITEM(S5P_CLKSRC_FSYS),
+ SAVE_ITEM(S5P_CLKSRC_PERIL0),
+ SAVE_ITEM(S5P_CLKSRC_PERIL1),
+ SAVE_ITEM(S5P_CLKDIV_CAM),
+ SAVE_ITEM(S5P_CLKDIV_TV),
+ SAVE_ITEM(S5P_CLKDIV_MFC),
+ SAVE_ITEM(S5P_CLKDIV_G3D),
+ SAVE_ITEM(S5P_CLKDIV_IMAGE),
+ SAVE_ITEM(S5P_CLKDIV_LCD0),
+ SAVE_ITEM(S5P_CLKDIV_LCD1),
+ SAVE_ITEM(S5P_CLKDIV_MAUDIO),
+ SAVE_ITEM(S5P_CLKDIV_FSYS0),
+ SAVE_ITEM(S5P_CLKDIV_FSYS1),
+ SAVE_ITEM(S5P_CLKDIV_FSYS2),
+ SAVE_ITEM(S5P_CLKDIV_FSYS3),
+ SAVE_ITEM(S5P_CLKDIV_PERIL0),
+ SAVE_ITEM(S5P_CLKDIV_PERIL1),
+ SAVE_ITEM(S5P_CLKDIV_PERIL2),
+ SAVE_ITEM(S5P_CLKDIV_PERIL3),
+ SAVE_ITEM(S5P_CLKDIV_PERIL4),
+ SAVE_ITEM(S5P_CLKDIV_PERIL5),
+ SAVE_ITEM(S5P_CLKDIV_TOP),
+ SAVE_ITEM(S5P_CLKSRC_MASK_CAM),
+ SAVE_ITEM(S5P_CLKSRC_MASK_TV),
+ SAVE_ITEM(S5P_CLKSRC_MASK_LCD0),
+ SAVE_ITEM(S5P_CLKSRC_MASK_LCD1),
+ SAVE_ITEM(S5P_CLKSRC_MASK_MAUDIO),
+ SAVE_ITEM(S5P_CLKSRC_MASK_FSYS),
+ SAVE_ITEM(S5P_CLKSRC_MASK_PERIL0),
+ SAVE_ITEM(S5P_CLKSRC_MASK_PERIL1),
+ SAVE_ITEM(S5P_CLKGATE_SCLKCAM),
+ SAVE_ITEM(S5P_CLKGATE_IP_CAM),
+ SAVE_ITEM(S5P_CLKGATE_IP_TV),
+ SAVE_ITEM(S5P_CLKGATE_IP_MFC),
+ SAVE_ITEM(S5P_CLKGATE_IP_G3D),
+ SAVE_ITEM(S5P_CLKGATE_IP_IMAGE),
+ SAVE_ITEM(S5P_CLKGATE_IP_LCD0),
+ SAVE_ITEM(S5P_CLKGATE_IP_LCD1),
+ SAVE_ITEM(S5P_CLKGATE_IP_FSYS),
+ SAVE_ITEM(S5P_CLKGATE_IP_GPS),
+ SAVE_ITEM(S5P_CLKGATE_IP_PERIL),
+ SAVE_ITEM(S5P_CLKGATE_IP_PERIR),
+ SAVE_ITEM(S5P_CLKGATE_BLOCK),
+ SAVE_ITEM(S5P_CLKSRC_MASK_DMC),
+ SAVE_ITEM(S5P_CLKSRC_DMC),
+ SAVE_ITEM(S5P_CLKDIV_DMC0),
+ SAVE_ITEM(S5P_CLKDIV_DMC1),
+ SAVE_ITEM(S5P_CLKGATE_IP_DMC),
+ SAVE_ITEM(S5P_CLKSRC_CPU),
+ SAVE_ITEM(S5P_CLKDIV_CPU),
+ SAVE_ITEM(S5P_CLKGATE_SCLKCPU),
+ SAVE_ITEM(S5P_CLKGATE_IP_CPU),
+ /* GIC side */
+ SAVE_ITEM(S5P_VA_GIC_CPU + 0x000),
+ SAVE_ITEM(S5P_VA_GIC_CPU + 0x004),
+ SAVE_ITEM(S5P_VA_GIC_CPU + 0x008),
+ SAVE_ITEM(S5P_VA_GIC_CPU + 0x00C),
+ SAVE_ITEM(S5P_VA_GIC_CPU + 0x014),
+ SAVE_ITEM(S5P_VA_GIC_CPU + 0x018),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x000),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x004),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x100),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x104),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x108),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x300),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x304),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x308),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x400),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x404),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x408),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x40C),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x410),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x414),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x418),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x41C),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x420),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x424),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x428),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x42C),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x430),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x434),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x438),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x43C),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x440),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x444),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x448),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x44C),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x450),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x454),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x458),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x45C),
+
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x800),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x804),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x808),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x80C),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x810),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x814),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x818),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x81C),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x820),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x824),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x828),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x82C),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x830),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x834),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x838),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x83C),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x840),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x844),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x848),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x84C),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x850),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x854),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x858),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0x85C),
+
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0xC00),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0xC04),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0xC08),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0xC0C),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0xC10),
+ SAVE_ITEM(S5P_VA_GIC_DIST + 0xC14),
+
+ SAVE_ITEM(S5P_VA_COMBINER_BASE + 0x000),
+ SAVE_ITEM(S5P_VA_COMBINER_BASE + 0x010),
+ SAVE_ITEM(S5P_VA_COMBINER_BASE + 0x020),
+ SAVE_ITEM(S5P_VA_COMBINER_BASE + 0x030),
+ SAVE_ITEM(S5P_VA_COMBINER_BASE + 0x040),
+ SAVE_ITEM(S5P_VA_COMBINER_BASE + 0x050),
+ SAVE_ITEM(S5P_VA_COMBINER_BASE + 0x060),
+ SAVE_ITEM(S5P_VA_COMBINER_BASE + 0x070),
+ SAVE_ITEM(S5P_VA_COMBINER_BASE + 0x080),
+ SAVE_ITEM(S5P_VA_COMBINER_BASE + 0x090),
+};
+
+static struct sleep_save exynos4_l2cc_save[] = {
+ SAVE_ITEM(S5P_VA_L2CC + L2X0_TAG_LATENCY_CTRL),
+ SAVE_ITEM(S5P_VA_L2CC + L2X0_DATA_LATENCY_CTRL),
+ SAVE_ITEM(S5P_VA_L2CC + L2X0_PREFETCH_CTRL),
+ SAVE_ITEM(S5P_VA_L2CC + L2X0_POWER_CTRL),
+ SAVE_ITEM(S5P_VA_L2CC + L2X0_AUX_CTRL),
+};
+
+void exynos4_cpu_suspend(void)
+{
+ unsigned long tmp;
+ unsigned long mask = 0xFFFFFFFF;
+
+ /* Setting Central Sequence Register for power down mode */
+
+ tmp = __raw_readl(S5P_CENTRAL_SEQ_CONFIGURATION);
+ tmp &= ~(S5P_CENTRAL_LOWPWR_CFG);
+ __raw_writel(tmp, S5P_CENTRAL_SEQ_CONFIGURATION);
+
+ /* Setting Central Sequence option Register */
+
+ tmp = __raw_readl(S5P_CENTRAL_SEQ_OPTION);
+ tmp &= ~(S5P_USE_MASK);
+ tmp |= S5P_USE_STANDBY_WFI0;
+ __raw_writel(tmp, S5P_CENTRAL_SEQ_OPTION);
+
+ /* Clear all interrupt pending to avoid early wakeup */
+
+ __raw_writel(mask, (S5P_VA_GIC_DIST + 0x280));
+ __raw_writel(mask, (S5P_VA_GIC_DIST + 0x284));
+ __raw_writel(mask, (S5P_VA_GIC_DIST + 0x288));
+
+ /* Disable all interrupt */
+
+ __raw_writel(0x0, (S5P_VA_GIC_CPU + 0x000));
+ __raw_writel(0x0, (S5P_VA_GIC_DIST + 0x000));
+ __raw_writel(mask, (S5P_VA_GIC_DIST + 0x184));
+ __raw_writel(mask, (S5P_VA_GIC_DIST + 0x188));
+
+ outer_flush_all();
+
+ /* issue the standby signal into the pm unit. */
+ cpu_do_idle();
+
+ /* we should never get past here */
+ panic("sleep resumed to originator?");
+}
+
+static void exynos4_pm_prepare(void)
+{
+ u32 tmp;
+
+ s3c_pm_do_save(exynos4_core_save, ARRAY_SIZE(exynos4_core_save));
+ s3c_pm_do_save(exynos4_l2cc_save, ARRAY_SIZE(exynos4_l2cc_save));
+
+ tmp = __raw_readl(S5P_INFORM1);
+
+ /* Set value of power down register for sleep mode */
+
+ s3c_pm_do_restore_core(exynos4_sleep, ARRAY_SIZE(exynos4_sleep));
+ __raw_writel(S5P_CHECK_SLEEP, S5P_INFORM1);
+
+ /* ensure at least INFORM0 has the resume address */
+
+ __raw_writel(virt_to_phys(s3c_cpu_resume), S5P_INFORM0);
+
+ /* Before enter central sequence mode, clock src register have to set */
+
+ s3c_pm_do_restore_core(exynos4_set_clksrc, ARRAY_SIZE(exynos4_set_clksrc));
+
+}
+
+static int exynos4_pm_add(struct sys_device *sysdev)
+{
+ pm_cpu_prep = exynos4_pm_prepare;
+ pm_cpu_sleep = exynos4_cpu_suspend;
+
+ return 0;
+}
+
+/* This function copy from linux/arch/arm/kernel/smp_scu.c */
+
+void exynos4_scu_enable(void __iomem *scu_base)
+{
+ u32 scu_ctrl;
+
+ scu_ctrl = __raw_readl(scu_base);
+ /* already enabled? */
+ if (scu_ctrl & 1)
+ return;
+
+ scu_ctrl |= 1;
+ __raw_writel(scu_ctrl, scu_base);
+
+ /*
+ * Ensure that the data accessed by CPU0 before the SCU was
+ * initialised is visible to the other CPUs.
+ */
+ flush_cache_all();
+}
+
+static int exynos4_pm_resume(struct sys_device *dev)
+{
+ /* For release retention */
+
+ __raw_writel((1 << 28), S5P_PAD_RET_MAUDIO_OPTION);
+ __raw_writel((1 << 28), S5P_PAD_RET_GPIO_OPTION);
+ __raw_writel((1 << 28), S5P_PAD_RET_UART_OPTION);
+ __raw_writel((1 << 28), S5P_PAD_RET_MMCA_OPTION);
+ __raw_writel((1 << 28), S5P_PAD_RET_MMCB_OPTION);
+ __raw_writel((1 << 28), S5P_PAD_RET_EBIA_OPTION);
+ __raw_writel((1 << 28), S5P_PAD_RET_EBIB_OPTION);
+
+ s3c_pm_do_restore_core(exynos4_core_save, ARRAY_SIZE(exynos4_core_save));
+
+ exynos4_scu_enable(S5P_VA_SCU);
+
+#ifdef CONFIG_CACHE_L2X0
+ s3c_pm_do_restore_core(exynos4_l2cc_save, ARRAY_SIZE(exynos4_l2cc_save));
+ outer_inv_all();
+ /* enable L2X0*/
+ writel_relaxed(1, S5P_VA_L2CC + L2X0_CTRL);
+#endif
+
+ return 0;
+}
+
+static struct sysdev_driver exynos4_pm_driver = {
+ .add = exynos4_pm_add,
+ .resume = exynos4_pm_resume,
+};
+
+static __init int exynos4_pm_drvinit(void)
+{
+ unsigned int tmp;
+
+ s3c_pm_init();
+
+ /* All wakeup disable */
+
+ tmp = __raw_readl(S5P_WAKEUP_MASK);
+ tmp |= ((0xFF << 8) | (0x1F << 1));
+ __raw_writel(tmp, S5P_WAKEUP_MASK);
+
+ return sysdev_driver_register(&exynos4_sysclass, &exynos4_pm_driver);
+}
+arch_initcall(exynos4_pm_drvinit);
diff --git a/arch/arm/mach-exynos4/sleep.S b/arch/arm/mach-exynos4/sleep.S
new file mode 100644
index 0000000..6b62425
--- /dev/null
+++ b/arch/arm/mach-exynos4/sleep.S
@@ -0,0 +1,76 @@
+/* linux/arch/arm/mach-exynos4/sleep.S
+ *
+ * Copyright (c) 2011 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * EXYNOS4210 power Manager (Suspend-To-RAM) support
+ * Based on S3C2410 sleep code by:
+ * Ben Dooks, (c) 2004 Simtec Electronics
+ *
+ * Based on PXA/SA1100 sleep code by:
+ * Nicolas Pitre, (c) 2002 Monta Vista Software Inc
+ * Cliff Brake, (c) 2001
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * 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
+*/
+
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+#include <asm/memory.h>
+
+ .text
+
+ /*
+ * s3c_cpu_save
+ *
+ * entry:
+ * r1 = v:p offset
+ */
+
+ENTRY(s3c_cpu_save)
+
+ stmfd sp!, { r3 - r12, lr }
+ ldr r3, =resume_with_mmu
+ bl cpu_suspend
+
+ ldr r0, =pm_cpu_sleep
+ ldr r0, [ r0 ]
+ mov pc, r0
+
+resume_with_mmu:
+ ldmfd sp!, { r3 - r12, pc }
+
+ .ltorg
+
+ /*
+ * sleep magic, to allow the bootloader to check for an valid
+ * image to resume to. Must be the first word before the
+ * s3c_cpu_resume entry.
+ */
+
+ .word 0x2bedf00d
+
+ /*
+ * s3c_cpu_resume
+ *
+ * resume code entry for bootloader to call
+ *
+ * we must put this code here in the data segment as we have no
+ * other way of restoring the stack pointer after sleep, and we
+ * must not write to the code segment (code is read-only)
+ */
+
+ENTRY(s3c_cpu_resume)
+ b cpu_resume
diff --git a/arch/arm/plat-samsung/include/plat/cpu.h b/arch/arm/plat-samsung/include/plat/cpu.h
index 9addb3d..cedfff5 100644
--- a/arch/arm/plat-samsung/include/plat/cpu.h
+++ b/arch/arm/plat-samsung/include/plat/cpu.h
@@ -82,6 +82,7 @@ extern struct sysdev_class s3c64xx_sysclass;
extern struct sysdev_class s5p64x0_sysclass;
extern struct sysdev_class s5p6442_sysclass;
extern struct sysdev_class s5pv210_sysclass;
+extern struct sysdev_class exynos4_sysclass;
extern void (*s5pc1xx_idle)(void);
--
1.7.1
More information about the linux-arm-kernel
mailing list