diff options
Diffstat (limited to 'arch/arm/mach-shmobile/pm-sh7372.c')
| -rw-r--r-- | arch/arm/mach-shmobile/pm-sh7372.c | 549 |
1 files changed, 0 insertions, 549 deletions
diff --git a/arch/arm/mach-shmobile/pm-sh7372.c b/arch/arm/mach-shmobile/pm-sh7372.c deleted file mode 100644 index c0293ae..0000000 --- a/arch/arm/mach-shmobile/pm-sh7372.c +++ /dev/null @@ -1,549 +0,0 @@ -/* - * sh7372 Power management support - * - * Copyright (C) 2011 Magnus Damm - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - */ - -#include <linux/pm.h> -#include <linux/suspend.h> -#include <linux/cpuidle.h> -#include <linux/module.h> -#include <linux/list.h> -#include <linux/err.h> -#include <linux/slab.h> -#include <linux/pm_clock.h> -#include <linux/platform_device.h> -#include <linux/delay.h> -#include <linux/irq.h> -#include <linux/bitrev.h> -#include <linux/console.h> - -#include <asm/cpuidle.h> -#include <asm/io.h> -#include <asm/tlbflush.h> -#include <asm/suspend.h> - -#include "common.h" -#include "pm-rmobile.h" -#include "sh7372.h" - -/* DBG */ -#define DBGREG1 IOMEM(0xe6100020) -#define DBGREG9 IOMEM(0xe6100040) - -/* CPGA */ -#define SYSTBCR IOMEM(0xe6150024) -#define MSTPSR0 IOMEM(0xe6150030) -#define MSTPSR1 IOMEM(0xe6150038) -#define MSTPSR2 IOMEM(0xe6150040) -#define MSTPSR3 IOMEM(0xe6150048) -#define MSTPSR4 IOMEM(0xe615004c) -#define PLLC01STPCR IOMEM(0xe61500c8) - -/* SYSC */ -#define SYSC_BASE IOMEM(0xe6180000) - -#define SBAR IOMEM(0xe6180020) -#define WUPRMSK IOMEM(0xe6180028) -#define WUPSMSK IOMEM(0xe618002c) -#define WUPSMSK2 IOMEM(0xe6180048) -#define WUPSFAC IOMEM(0xe6180098) -#define IRQCR IOMEM(0xe618022c) -#define IRQCR2 IOMEM(0xe6180238) -#define IRQCR3 IOMEM(0xe6180244) -#define IRQCR4 IOMEM(0xe6180248) -#define PDNSEL IOMEM(0xe6180254) - -/* INTC */ -#define ICR1A IOMEM(0xe6900000) -#define ICR2A IOMEM(0xe6900004) -#define ICR3A IOMEM(0xe6900008) -#define ICR4A IOMEM(0xe690000c) -#define INTMSK00A IOMEM(0xe6900040) -#define INTMSK10A IOMEM(0xe6900044) -#define INTMSK20A IOMEM(0xe6900048) -#define INTMSK30A IOMEM(0xe690004c) - -/* MFIS */ -/* FIXME: pointing where? */ -#define SMFRAM 0xe6a70000 - -/* AP-System Core */ -#define APARMBAREA IOMEM(0xe6f10020) - -#ifdef CONFIG_PM - -#define PM_DOMAIN_ON_OFF_LATENCY_NS 250000 - -static int sh7372_a4r_pd_suspend(void) -{ - sh7372_intcs_suspend(); - __raw_writel(0x300fffff, WUPRMSK); /* avoid wakeup */ - return 0; -} - -static bool a4s_suspend_ready; - -static int sh7372_a4s_pd_suspend(void) -{ - /* - * The A4S domain contains the CPU core and therefore it should - * only be turned off if the CPU is not in use. This may happen - * during system suspend, when SYSC is going to be used for generating - * resume signals and a4s_suspend_ready is set to let - * sh7372_enter_suspend() know that it can turn A4S off. - */ - a4s_suspend_ready = true; - return -EBUSY; -} - -static void sh7372_a4s_pd_resume(void) -{ - a4s_suspend_ready = false; -} - -static int sh7372_a3sp_pd_suspend(void) -{ - /* - * Serial consoles make use of SCIF hardware located in A3SP, - * keep such power domain on if "no_console_suspend" is set. - */ - return console_suspend_enabled ? 0 : -EBUSY; -} - -static struct rmobile_pm_domain sh7372_pm_domains[] = { - { - .genpd.name = "A4LC", - .genpd.power_on_latency_ns = PM_DOMAIN_ON_OFF_LATENCY_NS, - .genpd.power_off_latency_ns = PM_DOMAIN_ON_OFF_LATENCY_NS, - .base = SYSC_BASE, - .bit_shift = 1, - }, - { - .genpd.name = "A4MP", - .genpd.power_on_latency_ns = PM_DOMAIN_ON_OFF_LATENCY_NS, - .genpd.power_off_latency_ns = PM_DOMAIN_ON_OFF_LATENCY_NS, - .base = SYSC_BASE, - .bit_shift = 2, - }, - { - .genpd.name = "D4", - .genpd.power_on_latency_ns = PM_DOMAIN_ON_OFF_LATENCY_NS, - .genpd.power_off_latency_ns = PM_DOMAIN_ON_OFF_LATENCY_NS, - .base = SYSC_BASE, - .bit_shift = 3, - }, - { - .genpd.name = "A4R", - .genpd.power_on_latency_ns = PM_DOMAIN_ON_OFF_LATENCY_NS, - .genpd.power_off_latency_ns = PM_DOMAIN_ON_OFF_LATENCY_NS, - .base = SYSC_BASE, - .bit_shift = 5, - .suspend = sh7372_a4r_pd_suspend, - .resume = sh7372_intcs_resume, - }, - { - .genpd.name = "A3RV", - .genpd.power_on_latency_ns = PM_DOMAIN_ON_OFF_LATENCY_NS, - .genpd.power_off_latency_ns = PM_DOMAIN_ON_OFF_LATENCY_NS, - .base = SYSC_BASE, - .bit_shift = 6, - }, - { - .genpd.name = "A3RI", - .genpd.power_on_latency_ns = PM_DOMAIN_ON_OFF_LATENCY_NS, - .genpd.power_off_latency_ns = PM_DOMAIN_ON_OFF_LATENCY_NS, - .base = SYSC_BASE, - .bit_shift = 8, - }, - { - .genpd.name = "A4S", - .genpd.power_on_latency_ns = PM_DOMAIN_ON_OFF_LATENCY_NS, - .genpd.power_off_latency_ns = PM_DOMAIN_ON_OFF_LATENCY_NS, - .base = SYSC_BASE, - .bit_shift = 10, - .gov = &pm_domain_always_on_gov, - .no_debug = true, - .suspend = sh7372_a4s_pd_suspend, - .resume = sh7372_a4s_pd_resume, - }, - { - .genpd.name = "A3SP", - .genpd.power_on_latency_ns = PM_DOMAIN_ON_OFF_LATENCY_NS, - .genpd.power_off_latency_ns = PM_DOMAIN_ON_OFF_LATENCY_NS, - .base = SYSC_BASE, - .bit_shift = 11, - .gov = &pm_domain_always_on_gov, - .no_debug = true, - .suspend = sh7372_a3sp_pd_suspend, - }, - { - .genpd.name = "A3SG", - .genpd.power_on_latency_ns = PM_DOMAIN_ON_OFF_LATENCY_NS, - .genpd.power_off_latency_ns = PM_DOMAIN_ON_OFF_LATENCY_NS, - .base = SYSC_BASE, - .bit_shift = 13, - }, -}; - -void __init sh7372_init_pm_domains(void) -{ - rmobile_init_domains(sh7372_pm_domains, ARRAY_SIZE(sh7372_pm_domains)); - pm_genpd_add_subdomain_names("A4LC", "A3RV"); - pm_genpd_add_subdomain_names("A4R", "A4LC"); - pm_genpd_add_subdomain_names("A4S", "A3SG"); - pm_genpd_add_subdomain_names("A4S", "A3SP"); -} - -#endif /* CONFIG_PM */ - -#if defined(CONFIG_SUSPEND) || defined(CONFIG_CPU_IDLE) -static void sh7372_set_reset_vector(unsigned long address) -{ - /* set reset vector, translate 4k */ - __raw_writel(address, SBAR); - __raw_writel(0, APARMBAREA); -} - -static void sh7372_enter_sysc(int pllc0_on, unsigned long sleep_mode) -{ - if (pllc0_on) - __raw_writel(0, PLLC01STPCR); - else - __raw_writel(1 << 28, PLLC01STPCR); - - __raw_readl(WUPSFAC); /* read wakeup int. factor before sleep */ - cpu_suspend(sleep_mode, sh7372_do_idle_sysc); - __raw_readl(WUPSFAC); /* read wakeup int. factor after wakeup */ - - /* disable reset vector translation */ - __raw_writel(0, SBAR); -} - -static int sh7372_sysc_valid(unsigned long *mskp, unsigned long *msk2p) -{ - unsigned long mstpsr0, mstpsr1, mstpsr2, mstpsr3, mstpsr4; - unsigned long msk, msk2; - - /* check active clocks to determine potential wakeup sources */ - - mstpsr0 = __raw_readl(MSTPSR0); - if ((mstpsr0 & 0x00000003) != 0x00000003) { - pr_debug("sh7372 mstpsr0 0x%08lx\n", mstpsr0); - return 0; - } - - mstpsr1 = __raw_readl(MSTPSR1); - if ((mstpsr1 & 0xff079b7f) != 0xff079b7f) { - pr_debug("sh7372 mstpsr1 0x%08lx\n", mstpsr1); - return 0; - } - - mstpsr2 = __raw_readl(MSTPSR2); - if ((mstpsr2 & 0x000741ff) != 0x000741ff) { - pr_debug("sh7372 mstpsr2 0x%08lx\n", mstpsr2); - return 0; - } - - mstpsr3 = __raw_readl(MSTPSR3); - if ((mstpsr3 & 0x1a60f010) != 0x1a60f010) { - pr_debug("sh7372 mstpsr3 0x%08lx\n", mstpsr3); - return 0; - } - - mstpsr4 = __raw_readl(MSTPSR4); - if ((mstpsr4 & 0x00008cf0) != 0x00008cf0) { - pr_debug("sh7372 mstpsr4 0x%08lx\n", mstpsr4); - return 0; - } - - msk = 0; - msk2 = 0; - - /* make bitmaps of limited number of wakeup sources */ - - if ((mstpsr2 & (1 << 23)) == 0) /* SPU2 */ - msk |= 1 << 31; - - if ((mstpsr2 & (1 << 12)) == 0) /* MFI_MFIM */ - msk |= 1 << 21; - - if ((mstpsr4 & (1 << 3)) == 0) /* KEYSC */ - msk |= 1 << 2; - - if ((mstpsr1 & (1 << 24)) == 0) /* CMT0 */ - msk |= 1 << 1; - - if ((mstpsr3 & (1 << 29)) == 0) /* CMT1 */ - msk |= 1 << 1; - - if ((mstpsr4 & (1 << 0)) == 0) /* CMT2 */ - msk |= 1 << 1; - - if ((mstpsr2 & (1 << 13)) == 0) /* MFI_MFIS */ - msk2 |= 1 << 17; - - *mskp = msk; - *msk2p = msk2; - - return 1; -} - -static void sh7372_icr_to_irqcr(unsigned long icr, u16 *irqcr1p, u16 *irqcr2p) -{ - u16 tmp, irqcr1, irqcr2; - int k; - - irqcr1 = 0; - irqcr2 = 0; - - /* convert INTCA ICR register layout to SYSC IRQCR+IRQCR2 */ - for (k = 0; k <= 7; k++) { - tmp = (icr >> ((7 - k) * 4)) & 0xf; - irqcr1 |= (tmp & 0x03) << (k * 2); - irqcr2 |= (tmp >> 2) << (k * 2); - } - - *irqcr1p = irqcr1; - *irqcr2p = irqcr2; -} - -static void sh7372_setup_sysc(unsigned long msk, unsigned long msk2) -{ - u16 irqcrx_low, irqcrx_high, irqcry_low, irqcry_high; - unsigned long tmp; - - /* read IRQ0A -> IRQ15A mask */ - tmp = bitrev8(__raw_readb(INTMSK00A)); - tmp |= bitrev8(__raw_readb(INTMSK10A)) << 8; - - /* setup WUPSMSK from clocks and external IRQ mask */ - msk = (~msk & 0xc030000f) | (tmp << 4); - __raw_writel(msk, WUPSMSK); - - /* propage level/edge trigger for external IRQ 0->15 */ - sh7372_icr_to_irqcr(__raw_readl(ICR1A), &irqcrx_low, &irqcry_low); - sh7372_icr_to_irqcr(__raw_readl(ICR2A), &irqcrx_high, &irqcry_high); - __raw_writel((irqcrx_high << 16) | irqcrx_low, IRQCR); - __raw_writel((irqcry_high << 16) | irqcry_low, IRQCR2); - - /* read IRQ16A -> IRQ31A mask */ - tmp = bitrev8(__raw_readb(INTMSK20A)); - tmp |= bitrev8(__raw_readb(INTMSK30A)) << 8; - - /* setup WUPSMSK2 from clocks and external IRQ mask */ - msk2 = (~msk2 & 0x00030000) | tmp; - __raw_writel(msk2, WUPSMSK2); - - /* propage level/edge trigger for external IRQ 16->31 */ - sh7372_icr_to_irqcr(__raw_readl(ICR3A), &irqcrx_low, &irqcry_low); - sh7372_icr_to_irqcr(__raw_readl(ICR4A), &irqcrx_high, &irqcry_high); - __raw_writel((irqcrx_high << 16) | irqcrx_low, IRQCR3); - __raw_writel((irqcry_high << 16) | irqcry_low, IRQCR4); -} - -static void sh7372_enter_a3sm_common(int pllc0_on) -{ - /* use INTCA together with SYSC for wakeup */ - sh7372_setup_sysc(1 << 0, 0); - sh7372_set_reset_vector(__pa(sh7372_resume_core_standby_sysc)); - sh7372_enter_sysc(pllc0_on, 1 << 12); -} - -static void sh7372_enter_a4s_common(int pllc0_on) -{ - sh7372_intca_suspend(); - sh7372_set_reset_vector(SMFRAM); - sh7372_enter_sysc(pllc0_on, 1 << 10); - sh7372_intca_resume(); -} - -static void sh7372_pm_setup_smfram(void) -{ - /* pass physical address of cpu_resume() to assembly resume code */ - sh7372_cpu_resume = virt_to_phys(cpu_resume); - - memcpy((void *)SMFRAM, sh7372_resume_core_standby_sysc, 0x100); -} -#else -static inline void sh7372_pm_setup_smfram(void) {} -#endif /* CONFIG_SUSPEND || CONFIG_CPU_IDLE */ - -#ifdef CONFIG_CPU_IDLE -static int sh7372_do_idle_core_standby(unsigned long unused) -{ - cpu_do_idle(); /* WFI when SYSTBCR == 0x10 -> Core Standby */ - return 0; -} - -static int sh7372_enter_core_standby(struct cpuidle_device *dev, - struct cpuidle_driver *drv, int index) -{ - sh7372_set_reset_vector(__pa(sh7372_resume_core_standby_sysc)); - - /* enter sleep mode with SYSTBCR to 0x10 */ - __raw_writel(0x10, SYSTBCR); - cpu_suspend(0, sh7372_do_idle_core_standby); - __raw_writel(0, SYSTBCR); - - /* disable reset vector translation */ - __raw_writel(0, SBAR); - - return 1; -} - -static int sh7372_enter_a3sm_pll_on(struct cpuidle_device *dev, - struct cpuidle_driver *drv, int index) -{ - sh7372_enter_a3sm_common(1); - return 2; -} - -static int sh7372_enter_a3sm_pll_off(struct cpuidle_device *dev, - struct cpuidle_driver *drv, int index) -{ - sh7372_enter_a3sm_common(0); - return 3; -} - -static int sh7372_enter_a4s(struct cpuidle_device *dev, - struct cpuidle_driver *drv, int index) -{ - unsigned long msk, msk2; - - if (!sh7372_sysc_valid(&msk, &msk2)) - return sh7372_enter_a3sm_pll_off(dev, drv, index); - - sh7372_setup_sysc(msk, msk2); - sh7372_enter_a4s_common(0); - return 4; -} - -static struct cpuidle_driver sh7372_cpuidle_driver = { - .name = "sh7372_cpuidle", - .owner = THIS_MODULE, - .state_count = 5, - .safe_state_index = 0, /* C1 */ - .states[0] = ARM_CPUIDLE_WFI_STATE, - .states[1] = { - .name = "C2", - .desc = "Core Standby Mode", - .exit_latency = 10, - .target_residency = 20 + 10, - .enter = sh7372_enter_core_standby, - }, - .states[2] = { - .name = "C3", - .desc = "A3SM PLL ON", - .exit_latency = 20, - .target_residency = 30 + 20, - .enter = sh7372_enter_a3sm_pll_on, - }, - .states[3] = { - .name = "C4", - .desc = "A3SM PLL OFF", - .exit_latency = 120, - .target_residency = 30 + 120, - .enter = sh7372_enter_a3sm_pll_off, - }, - .states[4] = { - .name = "C5", - .desc = "A4S PLL OFF", - .exit_latency = 240, - .target_residency = 30 + 240, - .enter = sh7372_enter_a4s, - .disabled = true, - }, -}; - -static void __init sh7372_cpuidle_init(void) -{ - shmobile_cpuidle_set_driver(&sh7372_cpuidle_driver); -} -#else -static void __init sh7372_cpuidle_init(void) {} -#endif - -#ifdef CONFIG_SUSPEND -static int sh7372_enter_suspend(suspend_state_t suspend_state) -{ - unsigned long msk, msk2; - - /* check active clocks to determine potential wakeup sources */ - if (sh7372_sysc_valid(&msk, &msk2) && a4s_suspend_ready) { - /* convert INTC mask/sense to SYSC mask/sense */ - sh7372_setup_sysc(msk, msk2); - - /* enter A4S sleep with PLLC0 off */ - pr_debug("entering A4S\n"); - sh7372_enter_a4s_common(0); - return 0; - } - - /* default to enter A3SM sleep with PLLC0 off */ - pr_debug("entering A3SM\n"); - sh7372_enter_a3sm_common(0); - return 0; -} - -/** - * sh7372_pm_notifier_fn - SH7372 PM notifier routine. - * @notifier: Unused. - * @pm_event: Event being handled. - * @unused: Unused. - */ -static int sh7372_pm_notifier_fn(struct notifier_block *notifier, - unsigned long pm_event, void *unused) -{ - switch (pm_event) { - case PM_SUSPEND_PREPARE: - /* - * This is necessary, because the A4R domain has to be "on" - * when suspend_device_irqs() and resume_device_irqs() are - * executed during system suspend and resume, respectively, so - * that those functions don't crash while accessing the INTCS. - */ - pm_genpd_name_poweron("A4R"); - break; - case PM_POST_SUSPEND: - pm_genpd_poweroff_unused(); - break; - } - - return NOTIFY_DONE; -} - -static void sh7372_suspend_init(void) -{ - shmobile_suspend_ops.enter = sh7372_enter_suspend; - pm_notifier(sh7372_pm_notifier_fn, 0); -} -#else -static void sh7372_suspend_init(void) {} -#endif - -void __init sh7372_pm_init(void) -{ - /* enable DBG hardware block to kick SYSC */ - __raw_writel(0x0000a500, DBGREG9); - __raw_writel(0x0000a501, DBGREG9); - __raw_writel(0x00000000, DBGREG1); - - /* do not convert A3SM, A3SP, A3SG, A4R power down into A4S */ - __raw_writel(0, PDNSEL); - - sh7372_pm_setup_smfram(); - - sh7372_suspend_init(); - sh7372_cpuidle_init(); -} - -void __init sh7372_pm_init_late(void) -{ - shmobile_init_late(); - pm_genpd_name_attach_cpuidle("A4S", 4); -} |