275 lines
6.9 KiB
C
275 lines
6.9 KiB
C
/*
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* PXA910 Power Management Routines
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*
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* This software program is licensed subject to the GNU General Public License
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* (GPL).Version 2,June 1991, available at http://www.fsf.org/copyleft/gpl.html
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*
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* (C) Copyright 2009 Marvell International Ltd.
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* All Rights Reserved
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*/
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/err.h>
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#include <linux/time.h>
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#include <linux/delay.h>
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#include <linux/suspend.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include <linux/irq.h>
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#include <asm/mach-types.h>
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#include <asm/outercache.h>
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#include "cputype.h"
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#include "addr-map.h"
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#include "pm-pxa910.h"
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#include "regs-icu.h"
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#include "irqs.h"
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int pxa910_set_wake(struct irq_data *data, unsigned int on)
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{
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uint32_t awucrm = 0, apcr = 0;
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int irq = data->irq;
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/* setting wakeup sources */
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switch (irq) {
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/* wakeup line 2 */
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case IRQ_PXA910_AP_GPIO:
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awucrm = MPMU_AWUCRM_WAKEUP(2);
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apcr |= MPMU_APCR_SLPWP2;
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break;
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/* wakeup line 3 */
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case IRQ_PXA910_KEYPAD:
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awucrm = MPMU_AWUCRM_WAKEUP(3) | MPMU_AWUCRM_KEYPRESS;
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apcr |= MPMU_APCR_SLPWP3;
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break;
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case IRQ_PXA910_ROTARY:
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awucrm = MPMU_AWUCRM_WAKEUP(3) | MPMU_AWUCRM_NEWROTARY;
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apcr |= MPMU_APCR_SLPWP3;
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break;
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case IRQ_PXA910_TRACKBALL:
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awucrm = MPMU_AWUCRM_WAKEUP(3) | MPMU_AWUCRM_TRACKBALL;
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apcr |= MPMU_APCR_SLPWP3;
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break;
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/* wakeup line 4 */
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case IRQ_PXA910_AP1_TIMER1:
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awucrm = MPMU_AWUCRM_WAKEUP(4) | MPMU_AWUCRM_AP1_TIMER_1;
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apcr |= MPMU_APCR_SLPWP4;
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break;
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case IRQ_PXA910_AP1_TIMER2:
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awucrm = MPMU_AWUCRM_WAKEUP(4) | MPMU_AWUCRM_AP1_TIMER_2;
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apcr |= MPMU_APCR_SLPWP4;
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break;
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case IRQ_PXA910_AP1_TIMER3:
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awucrm = MPMU_AWUCRM_WAKEUP(4) | MPMU_AWUCRM_AP1_TIMER_3;
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apcr |= MPMU_APCR_SLPWP4;
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break;
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case IRQ_PXA910_AP2_TIMER1:
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awucrm = MPMU_AWUCRM_WAKEUP(4) | MPMU_AWUCRM_AP2_TIMER_1;
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apcr |= MPMU_APCR_SLPWP4;
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break;
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case IRQ_PXA910_AP2_TIMER2:
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awucrm = MPMU_AWUCRM_WAKEUP(4) | MPMU_AWUCRM_AP2_TIMER_2;
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apcr |= MPMU_APCR_SLPWP4;
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break;
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case IRQ_PXA910_AP2_TIMER3:
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awucrm = MPMU_AWUCRM_WAKEUP(4) | MPMU_AWUCRM_AP2_TIMER_3;
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apcr |= MPMU_APCR_SLPWP4;
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break;
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case IRQ_PXA910_RTC_ALARM:
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awucrm = MPMU_AWUCRM_WAKEUP(4) | MPMU_AWUCRM_RTC_ALARM;
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apcr |= MPMU_APCR_SLPWP4;
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break;
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/* wakeup line 5 */
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case IRQ_PXA910_USB1:
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case IRQ_PXA910_USB2:
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awucrm = MPMU_AWUCRM_WAKEUP(5);
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apcr |= MPMU_APCR_SLPWP5;
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break;
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/* wakeup line 6 */
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case IRQ_PXA910_MMC:
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awucrm = MPMU_AWUCRM_WAKEUP(6)
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| MPMU_AWUCRM_SDH1
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| MPMU_AWUCRM_SDH2;
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apcr |= MPMU_APCR_SLPWP6;
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break;
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/* wakeup line 7 */
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case IRQ_PXA910_PMIC_INT:
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awucrm = MPMU_AWUCRM_WAKEUP(7);
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apcr |= MPMU_APCR_SLPWP7;
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break;
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default:
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if (irq >= IRQ_GPIO_START && irq < IRQ_BOARD_START) {
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awucrm = MPMU_AWUCRM_WAKEUP(2);
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apcr |= MPMU_APCR_SLPWP2;
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} else {
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/* FIXME: This should return a proper error code ! */
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printk(KERN_ERR "Error: no defined wake up source irq: %d\n",
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irq);
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}
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}
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if (on) {
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if (awucrm) {
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awucrm |= __raw_readl(MPMU_AWUCRM);
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__raw_writel(awucrm, MPMU_AWUCRM);
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}
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if (apcr) {
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apcr = ~apcr & __raw_readl(MPMU_APCR);
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__raw_writel(apcr, MPMU_APCR);
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}
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} else {
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if (awucrm) {
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awucrm = ~awucrm & __raw_readl(MPMU_AWUCRM);
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__raw_writel(awucrm, MPMU_AWUCRM);
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}
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if (apcr) {
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apcr |= __raw_readl(MPMU_APCR);
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__raw_writel(apcr, MPMU_APCR);
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}
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}
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return 0;
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}
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void pxa910_pm_enter_lowpower_mode(int state)
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{
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uint32_t idle_cfg, apcr;
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idle_cfg = __raw_readl(APMU_MOH_IDLE_CFG);
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apcr = __raw_readl(MPMU_APCR);
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apcr &= ~(MPMU_APCR_DDRCORSD | MPMU_APCR_APBSD | MPMU_APCR_AXISD
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| MPMU_APCR_VCTCXOSD | MPMU_APCR_STBYEN);
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idle_cfg &= ~(APMU_MOH_IDLE_CFG_MOH_IDLE
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| APMU_MOH_IDLE_CFG_MOH_PWRDWN);
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switch (state) {
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case POWER_MODE_UDR:
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/* only shutdown APB in UDR */
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apcr |= MPMU_APCR_STBYEN | MPMU_APCR_APBSD;
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/* fall through */
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case POWER_MODE_SYS_SLEEP:
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apcr |= MPMU_APCR_SLPEN; /* set the SLPEN bit */
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apcr |= MPMU_APCR_VCTCXOSD; /* set VCTCXOSD */
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/* fall through */
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case POWER_MODE_APPS_SLEEP:
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apcr |= MPMU_APCR_DDRCORSD; /* set DDRCORSD */
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/* fall through */
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case POWER_MODE_APPS_IDLE:
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apcr |= MPMU_APCR_AXISD; /* set AXISDD bit */
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/* fall through */
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case POWER_MODE_CORE_EXTIDLE:
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idle_cfg |= APMU_MOH_IDLE_CFG_MOH_IDLE;
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idle_cfg |= APMU_MOH_IDLE_CFG_MOH_PWRDWN;
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idle_cfg |= APMU_MOH_IDLE_CFG_MOH_PWR_SW(3)
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| APMU_MOH_IDLE_CFG_MOH_L2_PWR_SW(3);
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/* fall through */
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case POWER_MODE_CORE_INTIDLE:
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break;
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}
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/* program the memory controller hardware sleep type and auto wakeup */
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idle_cfg |= APMU_MOH_IDLE_CFG_MOH_DIS_MC_SW_REQ;
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idle_cfg |= APMU_MOH_IDLE_CFG_MOH_MC_WAKE_EN;
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__raw_writel(0x0, APMU_MC_HW_SLP_TYPE); /* auto refresh */
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/* set DSPSD, DTCMSD, BBSD, MSASLPEN */
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apcr |= MPMU_APCR_DSPSD | MPMU_APCR_DTCMSD | MPMU_APCR_BBSD
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| MPMU_APCR_MSASLPEN;
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/*always set SLEPEN bit mainly for MSA*/
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apcr |= MPMU_APCR_SLPEN;
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/* finally write the registers back */
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__raw_writel(idle_cfg, APMU_MOH_IDLE_CFG);
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__raw_writel(apcr, MPMU_APCR);
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}
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static int pxa910_pm_enter(suspend_state_t state)
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{
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unsigned int idle_cfg, reg = 0;
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/*pmic thread not completed,exit;otherwise system can't be waked up*/
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reg = __raw_readl(ICU_INT_CONF(IRQ_PXA910_PMIC_INT));
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if ((reg & 0x3) == 0)
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return -EAGAIN;
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idle_cfg = __raw_readl(APMU_MOH_IDLE_CFG);
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idle_cfg |= APMU_MOH_IDLE_CFG_MOH_PWRDWN
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| APMU_MOH_IDLE_CFG_MOH_SRAM_PWRDWN;
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__raw_writel(idle_cfg, APMU_MOH_IDLE_CFG);
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/* disable L2 */
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outer_disable();
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/* wait for l2 idle */
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while (!(readl(CIU_REG(0x8)) & (1 << 16)))
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udelay(1);
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cpu_do_idle();
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/* enable L2 */
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outer_resume();
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/* wait for l2 idle */
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while (!(readl(CIU_REG(0x8)) & (1 << 16)))
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udelay(1);
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idle_cfg = __raw_readl(APMU_MOH_IDLE_CFG);
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idle_cfg &= ~(APMU_MOH_IDLE_CFG_MOH_PWRDWN
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| APMU_MOH_IDLE_CFG_MOH_SRAM_PWRDWN);
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__raw_writel(idle_cfg, APMU_MOH_IDLE_CFG);
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return 0;
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}
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/*
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* Called after processes are frozen, but before we shut down devices.
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*/
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static int pxa910_pm_prepare(void)
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{
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pxa910_pm_enter_lowpower_mode(POWER_MODE_UDR);
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return 0;
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}
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/*
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* Called after devices are re-setup, but before processes are thawed.
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*/
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static void pxa910_pm_finish(void)
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{
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pxa910_pm_enter_lowpower_mode(POWER_MODE_CORE_INTIDLE);
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}
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static int pxa910_pm_valid(suspend_state_t state)
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{
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return ((state == PM_SUSPEND_STANDBY) || (state == PM_SUSPEND_MEM));
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}
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static const struct platform_suspend_ops pxa910_pm_ops = {
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.valid = pxa910_pm_valid,
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.prepare = pxa910_pm_prepare,
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.enter = pxa910_pm_enter,
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.finish = pxa910_pm_finish,
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};
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static int __init pxa910_pm_init(void)
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{
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uint32_t awucrm = 0;
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if (!cpu_is_pxa910())
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return -EIO;
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suspend_set_ops(&pxa910_pm_ops);
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/* Set the following bits for MMP3 playback with VCTXO on */
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__raw_writel(__raw_readl(APMU_SQU_CLK_GATE_CTRL) | (1 << 30),
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APMU_SQU_CLK_GATE_CTRL);
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__raw_writel(__raw_readl(MPMU_FCCR) | (1 << 28), MPMU_FCCR);
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awucrm |= MPMU_AWUCRM_AP_ASYNC_INT | MPMU_AWUCRM_AP_FULL_IDLE;
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__raw_writel(awucrm, MPMU_AWUCRM);
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return 0;
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}
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late_initcall(pxa910_pm_init);
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