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Commit 87046f4f authored by Chao Xie's avatar Chao Xie Committed by Haojian Zhuang
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ARM: mmp: add PM support for mmp2 



MMP2 can enter system sleep level during suspend.
It can be waken up by PMIC interrupt, RTC/ALARM.

Signed-off-by: default avatarChao Xie <chao.xie@marvell.com>
Signed-off-by: default avatarHaojian Zhuang <haojian.zhuang@gmail.com>
parent 5e5661a8

arch/arm/mach-mmp/Makefile

+4 −0
Original line number Diff line number Diff line
@@ -9,6 +9,10 @@ obj-$(CONFIG_CPU_PXA168) += pxa168.o 
obj-$(CONFIG_CPU_PXA910)	+= pxa910.o

obj-$(CONFIG_CPU_MMP2)		+= mmp2.o sram.o



ifeq ($(CONFIG_PM),y)

obj-$(CONFIG_CPU_MMP2)		+= pm-mmp2.o

endif



# board support

obj-$(CONFIG_MACH_ASPENITE)	+= aspenite.o

obj-$(CONFIG_MACH_ZYLONITE2)	+= aspenite.o

arch/arm/mach-mmp/include/mach/pm-mmp2.h

0 → 100644
+61 −0
Original line number Diff line number Diff line 
/*

 * MMP2 Power Management Routines

 *

 * This software program is licensed subject to the GNU General Public License

 * (GPL).Version 2,June 1991, available at http://www.fsf.org/copyleft/gpl.html

 *

 * (C) Copyright 2010 Marvell International Ltd.

 * All Rights Reserved

 */



#ifndef __MMP2_PM_H__

#define __MMP2_PM_H__



#include <mach/addr-map.h>



#define APMU_PJ_IDLE_CFG			APMU_REG(0x018)

#define APMU_PJ_IDLE_CFG_PJ_IDLE		(1 << 1)

#define APMU_PJ_IDLE_CFG_PJ_PWRDWN		(1 << 5)

#define APMU_PJ_IDLE_CFG_PWR_SW(x)		((x) << 16)

#define APMU_PJ_IDLE_CFG_L2_PWR_SW		(1 << 19)

#define APMU_PJ_IDLE_CFG_ISO_MODE_CNTRL_MASK	(3 << 28)



#define APMU_SRAM_PWR_DWN			APMU_REG(0x08c)



#define MPMU_SCCR				MPMU_REG(0x038)

#define MPMU_PCR_PJ				MPMU_REG(0x1000)

#define MPMU_PCR_PJ_AXISD			(1 << 31)

#define MPMU_PCR_PJ_SLPEN			(1 << 29)

#define MPMU_PCR_PJ_SPSD			(1 << 28)

#define MPMU_PCR_PJ_DDRCORSD			(1 << 27)

#define MPMU_PCR_PJ_APBSD			(1 << 26)

#define MPMU_PCR_PJ_INTCLR			(1 << 24)

#define MPMU_PCR_PJ_SLPWP0			(1 << 23)

#define MPMU_PCR_PJ_SLPWP1			(1 << 22)

#define MPMU_PCR_PJ_SLPWP2			(1 << 21)

#define MPMU_PCR_PJ_SLPWP3			(1 << 20)

#define MPMU_PCR_PJ_VCTCXOSD			(1 << 19)

#define MPMU_PCR_PJ_SLPWP4			(1 << 18)

#define MPMU_PCR_PJ_SLPWP5			(1 << 17)

#define MPMU_PCR_PJ_SLPWP6			(1 << 16)

#define MPMU_PCR_PJ_SLPWP7			(1 << 15)



#define MPMU_PLL2_CTRL1				MPMU_REG(0x0414)

#define MPMU_CGR_PJ				MPMU_REG(0x1024)

#define MPMU_WUCRM_PJ				MPMU_REG(0x104c)

#define MPMU_WUCRM_PJ_WAKEUP(x)			(1 << (x))

#define MPMU_WUCRM_PJ_RTC_ALARM			(1 << 17)



enum {

	POWER_MODE_ACTIVE = 0,

	POWER_MODE_CORE_INTIDLE,

	POWER_MODE_CORE_EXTIDLE,

	POWER_MODE_APPS_IDLE,

	POWER_MODE_APPS_SLEEP,

	POWER_MODE_CHIP_SLEEP,

	POWER_MODE_SYS_SLEEP,

};



extern void mmp2_pm_enter_lowpower_mode(int state);

extern int mmp2_set_wake(struct irq_data *d, unsigned int on);

#endif

arch/arm/mach-mmp/irq.c

+7 −0
Original line number Diff line number Diff line
@@ -23,6 +23,10 @@ 


#include <mach/irqs.h>



#ifdef CONFIG_CPU_MMP2

#include <mach/pm-mmp2.h>

#endif



#include "common.h"



#define MAX_ICU_NR		16
@@ -305,6 +309,9 @@ void __init mmp2_init_icu(void) 
		set_irq_flags(irq, IRQF_VALID);

	}

	irq_set_default_host(icu_data[0].domain);

#ifdef CONFIG_CPU_MMP2

	icu_irq_chip.irq_set_wake = mmp2_set_wake;

#endif

}



#ifdef CONFIG_OF

arch/arm/mach-mmp/pm-mmp2.c

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/*

 * MMP2 Power Management Routines

 *

 * This software program is licensed subject to the GNU General Public License

 * (GPL).Version 2,June 1991, available at http://www.fsf.org/copyleft/gpl.html

 *

 * (C) Copyright 2012 Marvell International Ltd.

 * All Rights Reserved

 */



#include <linux/kernel.h>

#include <linux/errno.h>

#include <linux/err.h>

#include <linux/time.h>

#include <linux/delay.h>

#include <linux/suspend.h>

#include <linux/irq.h>

#include <linux/io.h>

#include <linux/interrupt.h>

#include <asm/mach-types.h>

#include <mach/hardware.h>

#include <mach/cputype.h>

#include <mach/addr-map.h>

#include <mach/pm-mmp2.h>

#include <mach/regs-icu.h>

#include <mach/irqs.h>



int mmp2_set_wake(struct irq_data *d, unsigned int on)

{

	int irq = d->irq;

	struct irq_desc *desc = irq_to_desc(irq);

	unsigned long data = 0;



	if (unlikely(irq >= nr_irqs)) {

		pr_err("IRQ nubmers are out of boundary!\n");

		return -EINVAL;

	}



	if (on) {

		if (desc->action)

			desc->action->flags |= IRQF_NO_SUSPEND;

	} else {

		if (desc->action)

			desc->action->flags &= ~IRQF_NO_SUSPEND;

	}



	/* enable wakeup sources */

	switch (irq) {

	case IRQ_MMP2_RTC:

	case IRQ_MMP2_RTC_ALARM:

		data = MPMU_WUCRM_PJ_WAKEUP(4) | MPMU_WUCRM_PJ_RTC_ALARM;

		break;

	case IRQ_MMP2_PMIC:

		data = MPMU_WUCRM_PJ_WAKEUP(7);

		break;

	case IRQ_MMP2_MMC2:

		/* mmc use WAKEUP2, same as GPIO wakeup source */

		data = MPMU_WUCRM_PJ_WAKEUP(2);

		break;

	}

	if (on) {

		if (data) {

			data |= __raw_readl(MPMU_WUCRM_PJ);

			__raw_writel(data, MPMU_WUCRM_PJ);

		}

	} else {

		if (data) {

			data = ~data & __raw_readl(MPMU_WUCRM_PJ);

			__raw_writel(data, MPMU_WUCRM_PJ);

		}

	}

	return 0;

}



static void pm_scu_clk_disable(void)

{

	unsigned int val;



	/* close AXI fabric clock gate */

	__raw_writel(0x0, CIU_REG(0x64));

	__raw_writel(0x0, CIU_REG(0x68));



	/* close MCB master clock gate */

	val = __raw_readl(CIU_REG(0x1c));

	val |= 0xf0;

	__raw_writel(val, CIU_REG(0x1c));



	return ;

}



static void pm_scu_clk_enable(void)

{

	unsigned int val;



	/* open AXI fabric clock gate */

	__raw_writel(0x03003003, CIU_REG(0x64));

	__raw_writel(0x00303030, CIU_REG(0x68));



	/* open MCB master clock gate */

	val = __raw_readl(CIU_REG(0x1c));

	val &= ~(0xf0);

	__raw_writel(val, CIU_REG(0x1c));



	return ;

}



static void pm_mpmu_clk_disable(void)

{

	/*

	 * disable clocks in MPMU_CGR_PJ register

	 * except clock for APMU_PLL1, APMU_PLL1_2 and AP_26M

	 */

	__raw_writel(0x0000a010, MPMU_CGR_PJ);

}



static void pm_mpmu_clk_enable(void)

{

	unsigned int val;



	__raw_writel(0xdffefffe, MPMU_CGR_PJ);

	val = __raw_readl(MPMU_PLL2_CTRL1);

	val |= (1 << 29);

	__raw_writel(val, MPMU_PLL2_CTRL1);



	return ;

}



void mmp2_pm_enter_lowpower_mode(int state)

{

	uint32_t idle_cfg, apcr;



	idle_cfg = __raw_readl(APMU_PJ_IDLE_CFG);

	apcr = __raw_readl(MPMU_PCR_PJ);

	apcr &= ~(MPMU_PCR_PJ_SLPEN | MPMU_PCR_PJ_DDRCORSD | MPMU_PCR_PJ_APBSD

		 | MPMU_PCR_PJ_AXISD | MPMU_PCR_PJ_VCTCXOSD | (1 << 13));

	idle_cfg &= ~APMU_PJ_IDLE_CFG_PJ_IDLE;



	switch (state) {

	case POWER_MODE_SYS_SLEEP:

		apcr |= MPMU_PCR_PJ_SLPEN;		/* set the SLPEN bit */

		apcr |= MPMU_PCR_PJ_VCTCXOSD;		/* set VCTCXOSD */

		/* fall through */

	case POWER_MODE_CHIP_SLEEP:

		apcr |= MPMU_PCR_PJ_SLPEN;

		/* fall through */

	case POWER_MODE_APPS_SLEEP:

		apcr |= MPMU_PCR_PJ_APBSD;		/* set APBSD */

		/* fall through */

	case POWER_MODE_APPS_IDLE:

		apcr |= MPMU_PCR_PJ_AXISD;		/* set AXISDD bit */

		apcr |= MPMU_PCR_PJ_DDRCORSD;		/* set DDRCORSD bit */

		idle_cfg |= APMU_PJ_IDLE_CFG_PJ_PWRDWN;	/* PJ power down */

		apcr |= MPMU_PCR_PJ_SPSD;

		/* fall through */

	case POWER_MODE_CORE_EXTIDLE:

		idle_cfg |= APMU_PJ_IDLE_CFG_PJ_IDLE;	/* set the IDLE bit */

		idle_cfg &= ~APMU_PJ_IDLE_CFG_ISO_MODE_CNTRL_MASK;

		idle_cfg |= APMU_PJ_IDLE_CFG_PWR_SW(3)

			| APMU_PJ_IDLE_CFG_L2_PWR_SW;

		break;

	case POWER_MODE_CORE_INTIDLE:

		apcr &= ~MPMU_PCR_PJ_SPSD;

		break;

	}



	/* set reserve bits */

	apcr |= (1 << 30) | (1 << 25);



	/* finally write the registers back */

	__raw_writel(idle_cfg, APMU_PJ_IDLE_CFG);

	__raw_writel(apcr, MPMU_PCR_PJ);	/* 0xfe086000 */

}



static int mmp2_pm_enter(suspend_state_t state)

{

	int temp;



	temp = __raw_readl(MMP2_ICU_INT4_MASK);

	if (temp & (1 << 1)) {

		printk(KERN_ERR "%s: PMIC interrupt is handling\n", __func__);

		return -EAGAIN;

	}



	temp = __raw_readl(APMU_SRAM_PWR_DWN);

	temp |= ((1 << 19) | (1 << 18));

	__raw_writel(temp, APMU_SRAM_PWR_DWN);

	pm_mpmu_clk_disable();

	pm_scu_clk_disable();



	printk(KERN_INFO "%s: before suspend\n", __func__);

	cpu_do_idle();

	printk(KERN_INFO "%s: after suspend\n", __func__);



	pm_mpmu_clk_enable();		/* enable clocks in MPMU */

	pm_scu_clk_enable();		/* enable clocks in SCU */



	return 0;

}



/*

 * Called after processes are frozen, but before we shut down devices.

 */

static int mmp2_pm_prepare(void)

{

	mmp2_pm_enter_lowpower_mode(POWER_MODE_SYS_SLEEP);



	return 0;

}



/*

 * Called after devices are re-setup, but before processes are thawed.

 */

static void mmp2_pm_finish(void)

{

	mmp2_pm_enter_lowpower_mode(POWER_MODE_CORE_INTIDLE);

}



static int mmp2_pm_valid(suspend_state_t state)

{

	return ((state == PM_SUSPEND_STANDBY) || (state == PM_SUSPEND_MEM));

}



/*

 * Set to PM_DISK_FIRMWARE so we can quickly veto suspend-to-disk.

 */

static const struct platform_suspend_ops mmp2_pm_ops = {

	.valid		= mmp2_pm_valid,

	.prepare	= mmp2_pm_prepare,

	.enter		= mmp2_pm_enter,

	.finish		= mmp2_pm_finish,

};



static int __init mmp2_pm_init(void)

{

	uint32_t apcr;



	if (!cpu_is_mmp2())

		return -EIO;



	suspend_set_ops(&mmp2_pm_ops);



	/*

	 * Set bit 0, Slow clock Select 32K clock input instead of VCXO

	 * VCXO is chosen by default, which would be disabled in suspend

	 */

	__raw_writel(0x5, MPMU_SCCR);



	/*

	 * Clear bit 23 of CIU_CPU_CONF

	 * direct PJ4 to DDR access through Memory Controller slow queue

	 * fast queue has issue and cause lcd will flick

	 */

	__raw_writel(__raw_readl(CIU_REG(0x8)) & ~(0x1 << 23), CIU_REG(0x8));



	/* Clear default low power control bit */

	apcr = __raw_readl(MPMU_PCR_PJ);

	apcr &= ~(MPMU_PCR_PJ_SLPEN | MPMU_PCR_PJ_DDRCORSD

			| MPMU_PCR_PJ_APBSD | MPMU_PCR_PJ_AXISD | 1 << 13);

	__raw_writel(apcr, MPMU_PCR_PJ);



	return 0;

}



late_initcall(mmp2_pm_init);