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linux/arch/arm/mach-mmp/pm-pxa910.c
Chao Xie 902ca22971 ARM: mmp: add pm support for pxa910 
add suspend/resume functionality for pxa910

Signed-off-by: Chao Xie <chao.xie@marvell.com>
Signed-off-by: Raul Xiong <xjian@marvell.com>
Signed-off-by: Haojian Zhuang <haojian.zhuang@gmail.com>
2012-05-07 11:48:37 +08:00

286 lines
7.1 KiB
C
Raw Blame History

/*
* PXA910 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 2009 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/interrupt.h>
#include <linux/io.h>
#include <linux/irq.h>
#include <asm/mach-types.h>
#include <mach/hardware.h>
#include <mach/cputype.h>
#include <mach/addr-map.h>
#include <mach/pm-pxa910.h>
#include <mach/regs-icu.h>
#include <mach/irqs.h>
int pxa910_set_wake(struct irq_data *data, unsigned int on)
{
int irq = data->irq;
struct irq_desc *desc = irq_to_desc(data->irq);
uint32_t awucrm = 0, apcr = 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;
}
/* setting wakeup sources */
switch (irq) {
/* wakeup line 2 */
case IRQ_PXA910_AP_GPIO:
awucrm = MPMU_AWUCRM_WAKEUP(2);
apcr |= MPMU_APCR_SLPWP2;
break;
/* wakeup line 3 */
case IRQ_PXA910_KEYPAD:
awucrm = MPMU_AWUCRM_WAKEUP(3) | MPMU_AWUCRM_KEYPRESS;
apcr |= MPMU_APCR_SLPWP3;
break;
case IRQ_PXA910_ROTARY:
awucrm = MPMU_AWUCRM_WAKEUP(3) | MPMU_AWUCRM_NEWROTARY;
apcr |= MPMU_APCR_SLPWP3;
break;
case IRQ_PXA910_TRACKBALL:
awucrm = MPMU_AWUCRM_WAKEUP(3) | MPMU_AWUCRM_TRACKBALL;
apcr |= MPMU_APCR_SLPWP3;
break;
/* wakeup line 4 */
case IRQ_PXA910_AP1_TIMER1:
awucrm = MPMU_AWUCRM_WAKEUP(4) | MPMU_AWUCRM_AP1_TIMER_1;
apcr |= MPMU_APCR_SLPWP4;
break;
case IRQ_PXA910_AP1_TIMER2:
awucrm = MPMU_AWUCRM_WAKEUP(4) | MPMU_AWUCRM_AP1_TIMER_2;
apcr |= MPMU_APCR_SLPWP4;
break;
case IRQ_PXA910_AP1_TIMER3:
awucrm = MPMU_AWUCRM_WAKEUP(4) | MPMU_AWUCRM_AP1_TIMER_3;
apcr |= MPMU_APCR_SLPWP4;
break;
case IRQ_PXA910_AP2_TIMER1:
awucrm = MPMU_AWUCRM_WAKEUP(4) | MPMU_AWUCRM_AP2_TIMER_1;
apcr |= MPMU_APCR_SLPWP4;
break;
case IRQ_PXA910_AP2_TIMER2:
awucrm = MPMU_AWUCRM_WAKEUP(4) | MPMU_AWUCRM_AP2_TIMER_2;
apcr |= MPMU_APCR_SLPWP4;
break;
case IRQ_PXA910_AP2_TIMER3:
awucrm = MPMU_AWUCRM_WAKEUP(4) | MPMU_AWUCRM_AP2_TIMER_3;
apcr |= MPMU_APCR_SLPWP4;
break;
case IRQ_PXA910_RTC_ALARM:
awucrm = MPMU_AWUCRM_WAKEUP(4) | MPMU_AWUCRM_RTC_ALARM;
apcr |= MPMU_APCR_SLPWP4;
break;
/* wakeup line 5 */
case IRQ_PXA910_USB1:
case IRQ_PXA910_USB2:
awucrm = MPMU_AWUCRM_WAKEUP(5);
apcr |= MPMU_APCR_SLPWP5;
break;
/* wakeup line 6 */
case IRQ_PXA910_MMC:
awucrm = MPMU_AWUCRM_WAKEUP(6)
| MPMU_AWUCRM_SDH1
| MPMU_AWUCRM_SDH2;
apcr |= MPMU_APCR_SLPWP6;
break;
/* wakeup line 7 */
case IRQ_PXA910_PMIC_INT:
awucrm = MPMU_AWUCRM_WAKEUP(7);
apcr |= MPMU_APCR_SLPWP7;
break;
default:
if (irq >= IRQ_GPIO_START && irq < IRQ_BOARD_START) {
awucrm = MPMU_AWUCRM_WAKEUP(2);
apcr |= MPMU_APCR_SLPWP2;
} else
printk(KERN_ERR "Error: no defined wake up source irq: %d\n",
irq);
}
if (on) {
if (awucrm) {
awucrm |= __raw_readl(MPMU_AWUCRM);
__raw_writel(awucrm, MPMU_AWUCRM);
}
if (apcr) {
apcr = ~apcr & __raw_readl(MPMU_APCR);
__raw_writel(apcr, MPMU_APCR);
}
} else {
if (awucrm) {
awucrm = ~awucrm & __raw_readl(MPMU_AWUCRM);
__raw_writel(awucrm, MPMU_AWUCRM);
}
if (apcr) {
apcr |= __raw_readl(MPMU_APCR);
__raw_writel(apcr, MPMU_APCR);
}
}
return 0;
}
void pxa910_pm_enter_lowpower_mode(int state)
{
uint32_t idle_cfg, apcr;
idle_cfg = __raw_readl(APMU_MOH_IDLE_CFG);
apcr = __raw_readl(MPMU_APCR);
apcr &= ~(MPMU_APCR_DDRCORSD | MPMU_APCR_APBSD | MPMU_APCR_AXISD
| MPMU_APCR_VCTCXOSD | MPMU_APCR_STBYEN);
idle_cfg &= ~(APMU_MOH_IDLE_CFG_MOH_IDLE
| APMU_MOH_IDLE_CFG_MOH_PWRDWN);
switch (state) {
case POWER_MODE_UDR:
/* only shutdown APB in UDR */
apcr |= MPMU_APCR_STBYEN | MPMU_APCR_APBSD;
/* fall through */
case POWER_MODE_SYS_SLEEP:
apcr |= MPMU_APCR_SLPEN; /* set the SLPEN bit */
apcr |= MPMU_APCR_VCTCXOSD; /* set VCTCXOSD */
/* fall through */
case POWER_MODE_APPS_SLEEP:
apcr |= MPMU_APCR_DDRCORSD; /* set DDRCORSD */
/* fall through */
case POWER_MODE_APPS_IDLE:
apcr |= MPMU_APCR_AXISD; /* set AXISDD bit */
/* fall through */
case POWER_MODE_CORE_EXTIDLE:
idle_cfg |= APMU_MOH_IDLE_CFG_MOH_IDLE;
idle_cfg |= APMU_MOH_IDLE_CFG_MOH_PWRDWN;
idle_cfg |= APMU_MOH_IDLE_CFG_MOH_PWR_SW(3)
| APMU_MOH_IDLE_CFG_MOH_L2_PWR_SW(3);
/* fall through */
case POWER_MODE_CORE_INTIDLE:
break;
}
/* program the memory controller hardware sleep type and auto wakeup */
idle_cfg |= APMU_MOH_IDLE_CFG_MOH_DIS_MC_SW_REQ;
idle_cfg |= APMU_MOH_IDLE_CFG_MOH_MC_WAKE_EN;
__raw_writel(0x0, APMU_MC_HW_SLP_TYPE); /* auto refresh */
/* set DSPSD, DTCMSD, BBSD, MSASLPEN */
apcr |= MPMU_APCR_DSPSD | MPMU_APCR_DTCMSD | MPMU_APCR_BBSD
| MPMU_APCR_MSASLPEN;
/*always set SLEPEN bit mainly for MSA*/
apcr |= MPMU_APCR_SLPEN;
/* finally write the registers back */
__raw_writel(idle_cfg, APMU_MOH_IDLE_CFG);
__raw_writel(apcr, MPMU_APCR);
}
static int pxa910_pm_enter(suspend_state_t state)
{
unsigned int idle_cfg, reg = 0;
/*pmic thread not completed,exit;otherwise system can't be waked up*/
reg = __raw_readl(ICU_INT_CONF(IRQ_PXA910_PMIC_INT));
if ((reg & 0x3) == 0)
return -EAGAIN;
idle_cfg = __raw_readl(APMU_MOH_IDLE_CFG);
idle_cfg |= APMU_MOH_IDLE_CFG_MOH_PWRDWN
| APMU_MOH_IDLE_CFG_MOH_SRAM_PWRDWN;
__raw_writel(idle_cfg, APMU_MOH_IDLE_CFG);
/* disable L2 */
outer_disable();
/* wait for l2 idle */
while (!(readl(CIU_REG(0x8)) & (1 << 16)))
udelay(1);
cpu_do_idle();
/* enable L2 */
outer_resume();
/* wait for l2 idle */
while (!(readl(CIU_REG(0x8)) & (1 << 16)))
udelay(1);
idle_cfg = __raw_readl(APMU_MOH_IDLE_CFG);
idle_cfg &= ~(APMU_MOH_IDLE_CFG_MOH_PWRDWN
| APMU_MOH_IDLE_CFG_MOH_SRAM_PWRDWN);
__raw_writel(idle_cfg, APMU_MOH_IDLE_CFG);
return 0;
}
/*
* Called after processes are frozen, but before we shut down devices.
*/
static int pxa910_pm_prepare(void)
{
pxa910_pm_enter_lowpower_mode(POWER_MODE_UDR);
return 0;
}
/*
* Called after devices are re-setup, but before processes are thawed.
*/
static void pxa910_pm_finish(void)
{
pxa910_pm_enter_lowpower_mode(POWER_MODE_CORE_INTIDLE);
}
static int pxa910_pm_valid(suspend_state_t state)
{
return ((state == PM_SUSPEND_STANDBY) || (state == PM_SUSPEND_MEM));
}
static const struct platform_suspend_ops pxa910_pm_ops = {
.valid = pxa910_pm_valid,
.prepare = pxa910_pm_prepare,
.enter = pxa910_pm_enter,
.finish = pxa910_pm_finish,
};
static int __init pxa910_pm_init(void)
{
uint32_t awucrm = 0;
if (!cpu_is_pxa910())
return -EIO;
suspend_set_ops(&pxa910_pm_ops);
/* Set the following bits for MMP3 playback with VCTXO on */
__raw_writel(__raw_readl(APMU_SQU_CLK_GATE_CTRL) | (1 << 30),
APMU_SQU_CLK_GATE_CTRL);
__raw_writel(__raw_readl(MPMU_FCCR) | (1 << 28), MPMU_FCCR);
awucrm |= MPMU_AWUCRM_AP_ASYNC_INT | MPMU_AWUCRM_AP_FULL_IDLE;
__raw_writel(awucrm, MPMU_AWUCRM);
return 0;
}
late_initcall(pxa910_pm_init);
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