/**************************************************************************//** * * @copyright (C) 2020 Nuvoton Technology Corp. All rights reserved. * * SPDX-License-Identifier: Apache-2.0 * * Change Logs: * Date Author Notes * 2020-03-25 klcheng First version * ******************************************************************************/ #include #if defined(BSP_USING_CLK) #include #include #include #include #include /* Private define ---------------------------------------------------------------*/ /* pm run mode speed mapping */ #define CONFIG_HIGH_SPEED_FREQ (192000000ul) #define CONFIG_NORMAL_SPEED_FREQ (192000000ul) #define CONFIG_MEDIMUM_SPEED_FREQ (144000000ul) #define CONFIG_LOW_SPEED_FREQ (72000000ul) /* pm sleep mode mapping */ #define CONFIG_MODE_LIGHT (CLK_PMUCTL_PDMSEL_FWPD) #define CONFIG_MODE_DEEP (CLK_PMUCTL_PDMSEL_PD) #define CONFIG_MODE_STANDBY (CLK_PMUCTL_PDMSEL_SPD1) #define CONFIG_MODE_SHUTDOWN (CLK_PMUCTL_PDMSEL_DPD) #if defined (NU_CLK_INVOKE_WKTMR) /* Wake-up timer clock source is OSC10K */ #define WKTMR_INTERVAL (CLK_PMUCTL_WKTMRIS_65536) #endif /* Timer module assigned for pm device usage. */ /* e.g. If TIMERn is reserved for pm, then define the PM_TIMER_USE_INSTANCE macro to n value (without parentheses). */ #define PM_TIMER_USE_INSTANCE 3 /* Concatenate */ #define _CONCAT2_(x, y) x##y #define _CONCAT3_(x, y, z) x##y##z #define CONCAT2(x, y) _CONCAT2_(x, y) #define CONCAT3(x, y, z) _CONCAT3_(x,y,z) /* Concatenate the macros of timer instance for driver usage. */ #define PM_TIMER CONCAT2(TIMER, PM_TIMER_USE_INSTANCE) #define PM_TMR CONCAT2(TMR, PM_TIMER_USE_INSTANCE) #define PM_TIMER_MODULE CONCAT2(PM_TMR, _MODULE) #define PM_TIMER_IRQn CONCAT2(PM_TMR, _IRQn) #define PM_TIMER_IRQHandler CONCAT2(PM_TMR, _IRQHandler) #define PM_TIMER_SEL_LXT CONCAT3(CLK_CLKSEL1_, PM_TMR, SEL_LXT) /* Private typedef --------------------------------------------------------------*/ /* Private functions ------------------------------------------------------------*/ static void pm_sleep(struct rt_pm *pm, rt_uint8_t mode); static void pm_run(struct rt_pm *pm, rt_uint8_t mode); static void pm_timer_start(struct rt_pm *pm, rt_uint32_t timeout); static void pm_timer_stop(struct rt_pm *pm); static rt_tick_t pm_timer_get_tick(struct rt_pm *pm); static rt_tick_t pm_tick_from_os_tick(rt_tick_t os_tick); static rt_tick_t os_tick_from_pm_tick(rt_tick_t pm_tick); /* Public functions -------------------------------------------------------------*/ int rt_hw_pm_init(void); /* Private variables ------------------------------------------------------------*/ static struct rt_pm_ops ops = { .sleep = pm_sleep, .run = pm_run, .timer_start = pm_timer_start, .timer_stop = pm_timer_stop, .timer_get_tick = pm_timer_get_tick, }; struct rt_device pm; /* pm sleep() entry */ static void pm_sleep(struct rt_pm *pm, rt_uint8_t mode) { SYS_UnlockReg(); switch (mode) { /* wake-up source: */ /* PM_SLEEP_MODE_LIGHT : TIMERn */ /* PM_SLEEP_MODE_DEEP : TIMERn */ /* PM_SLEEP_MODE_STANDBY : wake-up timer (optional) */ /* PM_SLEEP_MODE_SHUTDOWN : wake-up timer (optional) */ case PM_SLEEP_MODE_NONE: case PM_SLEEP_MODE_IDLE: break; case PM_SLEEP_MODE_LIGHT: CLK_SetPowerDownMode(CONFIG_MODE_LIGHT); CLK_PowerDown(); break; case PM_SLEEP_MODE_DEEP: CLK_SetPowerDownMode(CONFIG_MODE_DEEP); CLK_PowerDown(); break; case PM_SLEEP_MODE_STANDBY: #if defined (NU_CLK_INVOKE_WKTMR) /* Enable wake-up timer with pre-defined interval if it is invoked */ CLK_SET_WKTMR_INTERVAL(WKTMR_INTERVAL); CLK_ENABLE_WKTMR(); #endif CLK_SetPowerDownMode(CONFIG_MODE_STANDBY); CLK_PowerDown(); break; case PM_SLEEP_MODE_SHUTDOWN: #if defined (NU_CLK_INVOKE_WKTMR) /* Enable wake-up timer with pre-defined interval if it is invoked */ CLK_SET_WKTMR_INTERVAL(WKTMR_INTERVAL); CLK_ENABLE_WKTMR(); #endif CLK_SetPowerDownMode(CONFIG_MODE_SHUTDOWN); CLK_PowerDown(); break; default: RT_ASSERT(0); break; } SYS_LockReg(); } /* pm run() entry */ static void pm_run(struct rt_pm *pm, rt_uint8_t mode) { static uint8_t prev_mode = RT_PM_DEFAULT_RUN_MODE; /* ignore it if power mode is the same. */ if (mode == prev_mode) return; prev_mode = mode; SYS_UnlockReg(); /* Switch run mode frequency using PLL + HXT if HXT is enabled. Otherwise, the system clock will use PLL + HIRC. */ switch (mode) { case PM_RUN_MODE_HIGH_SPEED: CLK_SetCoreClock(CONFIG_HIGH_SPEED_FREQ); break; case PM_RUN_MODE_NORMAL_SPEED: CLK_SetCoreClock(CONFIG_NORMAL_SPEED_FREQ); break; case PM_RUN_MODE_MEDIUM_SPEED: CLK_SetCoreClock(CONFIG_MEDIMUM_SPEED_FREQ); break; case PM_RUN_MODE_LOW_SPEED: CLK_SetCoreClock(CONFIG_LOW_SPEED_FREQ); break; default: RT_ASSERT(0); break; } SystemCoreClockUpdate(); SysTick_Config(SystemCoreClock / RT_TICK_PER_SECOND); SYS_LockReg(); } static void hw_timer_init(void) { /* Assign a hardware timer for pm usage. */ SYS_UnlockReg(); CLK_SetModuleClock(PM_TIMER_MODULE, PM_TIMER_SEL_LXT, MODULE_NoMsk); CLK_EnableModuleClock(PM_TIMER_MODULE); SYS_LockReg(); /* Initialize timer and enable wakeup function. */ TIMER_Open(PM_TIMER, TIMER_CONTINUOUS_MODE, 1); TIMER_SET_PRESCALE_VALUE(PM_TIMER, 0); TIMER_EnableInt(PM_TIMER); TIMER_EnableWakeup(PM_TIMER); NVIC_EnableIRQ(PM_TIMER_IRQn); } /* convert os tick to pm timer tick */ static rt_tick_t pm_tick_from_os_tick(rt_tick_t os_tick) { rt_uint32_t hz = TIMER_GetModuleClock(PM_TIMER); return (rt_tick_t)(hz * os_tick / RT_TICK_PER_SECOND); } /* convert pm timer tick to os tick */ static rt_tick_t os_tick_from_pm_tick(rt_tick_t pm_tick) { static rt_uint32_t os_tick_remain = 0; rt_uint32_t ret, hz; hz = TIMER_GetModuleClock(PM_TIMER); ret = (pm_tick * RT_TICK_PER_SECOND + os_tick_remain) / hz; os_tick_remain += (pm_tick * RT_TICK_PER_SECOND); os_tick_remain %= hz; return ret; } /* pm_ops timer_get_tick() entry */ static rt_tick_t pm_timer_get_tick(struct rt_pm *pm) { rt_tick_t tick; tick = TIMER_GetCounter(PM_TIMER); return os_tick_from_pm_tick(tick); } /* pm timer_start() entry */ static void pm_timer_start(struct rt_pm *pm, rt_uint32_t timeout) { int tick; if (timeout == RT_TICK_MAX) return; /* start pm timer to compensate the os tick in power down mode */ tick = pm_tick_from_os_tick(timeout); TIMER_SET_CMP_VALUE(PM_TIMER, tick); TIMER_Start(PM_TIMER); } /* pm timer_stop() entry */ static void pm_timer_stop(struct rt_pm *pm) { TIMER_Stop(PM_TIMER); TIMER_ResetCounter(PM_TIMER); } /* pm device driver initialize. */ int rt_hw_pm_init(void) { rt_uint8_t timer_mask; if (CLK_GetPMUWKSrc()) { /* Release I/O hold status after wake-up from Standby Power-down Mode (SPD) */ CLK->IOPDCTL = 1; /* Clear Power Manager Status register */ CLK->PMUSTS = CLK_PMUSTS_CLRWK_Msk; } hw_timer_init(); /* initialize timer mask */ timer_mask = (1UL << PM_SLEEP_MODE_LIGHT) | (1UL << PM_SLEEP_MODE_DEEP); /* initialize system pm module */ rt_system_pm_init(&ops, timer_mask, RT_NULL); return RT_EOK; } INIT_BOARD_EXPORT(rt_hw_pm_init); /* pm timer interrupt entry */ void PM_TIMER_IRQHandler(void) { rt_interrupt_enter(); if (TIMER_GetIntFlag(PM_TIMER)) { TIMER_ClearIntFlag(PM_TIMER); } if (TIMER_GetWakeupFlag(PM_TIMER)) { TIMER_ClearWakeupFlag(PM_TIMER); } rt_interrupt_leave(); } #endif /* BSP_USING_CLK */