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Commit 60e49ca6 authored by Jongpill Lee's avatar Jongpill Lee Committed by Kukjin Kim
Browse files

ARM: EXYNOS: Support suspend and resume for EXYNOS5250 



This patch adds function for suspend and resume of Exynos5250.

Signed-off-by: default avatarJongpill Lee <boyko.lee@samsung.com>
[kgene.kim@samsung.com: re-worked on top of v3.4-rc7]
Signed-off-by: default avatarKukjin Kim <kgene.kim@samsung.com>
parent a2fa3041

arch/arm/mach-exynos/Kconfig

+2 −0
Original line number Diff line number Diff line
@@ -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

+1 −1
Original line number Diff line number Diff line
@@ -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

+48 −35
Original line number Diff line number Diff line
@@ -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

+59 −0
Original line number Diff line number Diff line
@@ -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);