diff options
| -rw-r--r-- | arch/arm/mach-exynos4/Makefile | 1 | ||||
| -rw-r--r-- | arch/arm/mach-exynos4/include/mach/pm-core.h | 49 | ||||
| -rw-r--r-- | arch/arm/mach-exynos4/pm.c | 420 | ||||
| -rw-r--r-- | arch/arm/mach-exynos4/sleep.S | 76 | ||||
| -rw-r--r-- | arch/arm/plat-samsung/include/plat/cpu.h | 1 |
5 files changed, 547 insertions, 0 deletions
diff --git a/arch/arm/mach-exynos4/Makefile b/arch/arm/mach-exynos4/Makefile index 56e367b48fbb..991a4c5f4677 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 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 000000000000..f26e46bc06ca --- /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@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 000000000000..10d917d9e3ad --- /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@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 000000000000..6b62425417a6 --- /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 9addb3dfb4bc..cedfff51c82b 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); |