[PATCH 4/4] ARM: pxa910: add pm support for pxa910
Chao Xie
chao.xie at marvell.com
Wed May 2 22:04:31 EDT 2012
add suspend/resume functionality for pxa910
Signed-off-by: Chao Xie <chao.xie at marvell.com>
Signed-off-by: Raul Xiong <xjian at marvell.com>
---
arch/arm/mach-mmp/Makefile | 1 +
arch/arm/mach-mmp/include/mach/pm-pxa910.h | 77 ++++++++
arch/arm/mach-mmp/irq-pxa168.c | 6 +
arch/arm/mach-mmp/pm-pxa910.c | 286 ++++++++++++++++++++++++++++
4 files changed, 370 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/mach-mmp/include/mach/pm-pxa910.h
create mode 100644 arch/arm/mach-mmp/pm-pxa910.c
diff --git a/arch/arm/mach-mmp/Makefile b/arch/arm/mach-mmp/Makefile
index fb96222..f111472 100644
--- a/arch/arm/mach-mmp/Makefile
+++ b/arch/arm/mach-mmp/Makefile
@@ -10,6 +10,7 @@ obj-$(CONFIG_CPU_PXA910) += pxa910.o irq-pxa168.o
obj-$(CONFIG_CPU_MMP2) += mmp2.o irq-mmp2.o sram.o
ifeq ($(CONFIG_PM),y)
+obj-$(CONFIG_CPU_PXA910) += pm-pxa910.o
obj-$(CONFIG_CPU_MMP2) += pm-mmp2.o
endif
diff --git a/arch/arm/mach-mmp/include/mach/pm-pxa910.h b/arch/arm/mach-mmp/include/mach/pm-pxa910.h
new file mode 100644
index 0000000..8cac8ab
--- /dev/null
+++ b/arch/arm/mach-mmp/include/mach/pm-pxa910.h
@@ -0,0 +1,77 @@
+/*
+ * 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
+ */
+
+#ifndef __PXA910_PM_H__
+#define __PXA910_PM_H__
+
+#define APMU_MOH_IDLE_CFG APMU_REG(0x0018)
+#define APMU_MOH_IDLE_CFG_MOH_IDLE (1 << 1)
+#define APMU_MOH_IDLE_CFG_MOH_PWRDWN (1 << 5)
+#define APMU_MOH_IDLE_CFG_MOH_SRAM_PWRDWN (1 << 6)
+#define APMU_MOH_IDLE_CFG_MOH_PWR_SW(x) (((x) & 0x3) << 16)
+#define APMU_MOH_IDLE_CFG_MOH_L2_PWR_SW(x) (((x) & 0x3) << 18)
+#define APMU_MOH_IDLE_CFG_MOH_DIS_MC_SW_REQ (1 << 21)
+#define APMU_MOH_IDLE_CFG_MOH_MC_WAKE_EN (1 << 20)
+
+#define APMU_SQU_CLK_GATE_CTRL APMU_REG(0x001c)
+#define APMU_MC_HW_SLP_TYPE APMU_REG(0x00b0)
+
+#define MPMU_FCCR MPMU_REG(0x0008)
+#define MPMU_APCR MPMU_REG(0x1000)
+#define MPMU_APCR_AXISD (1 << 31)
+#define MPMU_APCR_DSPSD (1 << 30)
+#define MPMU_APCR_SLPEN (1 << 29)
+#define MPMU_APCR_DTCMSD (1 << 28)
+#define MPMU_APCR_DDRCORSD (1 << 27)
+#define MPMU_APCR_APBSD (1 << 26)
+#define MPMU_APCR_BBSD (1 << 25)
+#define MPMU_APCR_SLPWP0 (1 << 23)
+#define MPMU_APCR_SLPWP1 (1 << 22)
+#define MPMU_APCR_SLPWP2 (1 << 21)
+#define MPMU_APCR_SLPWP3 (1 << 20)
+#define MPMU_APCR_VCTCXOSD (1 << 19)
+#define MPMU_APCR_SLPWP4 (1 << 18)
+#define MPMU_APCR_SLPWP5 (1 << 17)
+#define MPMU_APCR_SLPWP6 (1 << 16)
+#define MPMU_APCR_SLPWP7 (1 << 15)
+#define MPMU_APCR_MSASLPEN (1 << 14)
+#define MPMU_APCR_STBYEN (1 << 13)
+
+#define MPMU_AWUCRM MPMU_REG(0x104c)
+#define MPMU_AWUCRM_AP_ASYNC_INT (1 << 25)
+#define MPMU_AWUCRM_AP_FULL_IDLE (1 << 24)
+#define MPMU_AWUCRM_SDH1 (1 << 23)
+#define MPMU_AWUCRM_SDH2 (1 << 22)
+#define MPMU_AWUCRM_KEYPRESS (1 << 21)
+#define MPMU_AWUCRM_TRACKBALL (1 << 20)
+#define MPMU_AWUCRM_NEWROTARY (1 << 19)
+#define MPMU_AWUCRM_RTC_ALARM (1 << 17)
+#define MPMU_AWUCRM_AP2_TIMER_3 (1 << 13)
+#define MPMU_AWUCRM_AP2_TIMER_2 (1 << 12)
+#define MPMU_AWUCRM_AP2_TIMER_1 (1 << 11)
+#define MPMU_AWUCRM_AP1_TIMER_3 (1 << 10)
+#define MPMU_AWUCRM_AP1_TIMER_2 (1 << 9)
+#define MPMU_AWUCRM_AP1_TIMER_1 (1 << 8)
+#define MPMU_AWUCRM_WAKEUP(x) (1 << ((x) & 0x7))
+
+enum {
+ POWER_MODE_ACTIVE = 0,
+ POWER_MODE_CORE_INTIDLE,
+ POWER_MODE_CORE_EXTIDLE,
+ POWER_MODE_APPS_IDLE,
+ POWER_MODE_APPS_SLEEP,
+ POWER_MODE_SYS_SLEEP,
+ POWER_MODE_HIBERNATE,
+ POWER_MODE_UDR,
+};
+
+extern int pxa910_set_wake(struct irq_data *data, unsigned int on);
+
+#endif
diff --git a/arch/arm/mach-mmp/irq-pxa168.c b/arch/arm/mach-mmp/irq-pxa168.c
index 89706a0..d71b156 100644
--- a/arch/arm/mach-mmp/irq-pxa168.c
+++ b/arch/arm/mach-mmp/irq-pxa168.c
@@ -17,6 +17,9 @@
#include <linux/io.h>
#include <mach/regs-icu.h>
+#ifdef CONFIG_CPU_PXA910
+#include <mach/pm-pxa910.h>
+#endif
#include "common.h"
@@ -40,6 +43,9 @@ static struct irq_chip icu_irq_chip = {
.irq_ack = icu_mask_irq,
.irq_mask = icu_mask_irq,
.irq_unmask = icu_unmask_irq,
+#ifdef CONFIG_CPU_PXA910
+ .irq_set_wake = pxa910_set_wake,
+#endif
};
void __init icu_init_irq(void)
diff --git a/arch/arm/mach-mmp/pm-pxa910.c b/arch/arm/mach-mmp/pm-pxa910.c
new file mode 100644
index 0000000..2504d68
--- /dev/null
+++ b/arch/arm/mach-mmp/pm-pxa910.c
@@ -0,0 +1,286 @@
+/*
+ * 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-ciu.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);
--
1.7.0.4
More information about the linux-arm-kernel
mailing list