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jn516x: added sleep modes, support for 32kHz rtimer, and tickless clock

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Simon Duquennoy 2015-12-02 10:25:32 +01:00
parent 94c26b90d0
commit 3ff44f77b9
10 changed files with 769 additions and 241 deletions
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platform/jn516x/dev/rtimer-arch-slow.c Normal file
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/*
* Copyright (c) 2014, SICS Swedish ICT.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*
*/
/**
* \file
* RTIMER for NXP jn516x: 32 kHz mode
* \author
* Atis Elsts <atis.elsts@sics.se>
*/
#include "sys/rtimer.h"
#include "sys/clock.h"
#include <AppHardwareApi.h>
#include <PeripheralRegs.h>
#include <MicroSpecific.h>
#include "dev/watchdog.h"
#include "sys/energest.h"
#include "sys/process.h"
#if RTIMER_USE_32KHZ
#define DEBUG 0
#if DEBUG
#include <stdio.h>
#define PRINTF(...) printf(__VA_ARGS__)
#else
#define PRINTF(...)
#endif
#define RTIMER_TIMER_ISR_DEV E_AHI_DEVICE_SYSCTRL
/* 1.5 days wraparound time */
#define MAX_VALUE 0xFFFFFFFF
/* make this small to more easily detect wraparound bugs */
#define START_VALUE (60 * RTIMER_ARCH_SECOND)
#define WRAPAROUND_VALUE ((uint64_t)0x1FFFFFFFFFF)
static volatile rtimer_clock_t scheduled_time;
static volatile uint8_t has_next;
/*---------------------------------------------------------------------------*/
static void
timerISR(uint32 u32Device, uint32 u32ItemBitmap)
{
PRINTF("\ntimer isr %u %u\n", u32Device, u32ItemBitmap);
if(u32Device != RTIMER_TIMER_ISR_DEV) {
return;
}
ENERGEST_ON(ENERGEST_TYPE_IRQ);
if(u32ItemBitmap & TICK_TIMER_MASK) {
/* 32-bit overflow happened; restart the timer */
uint32_t ticks_late = WRAPAROUND_VALUE - u64AHI_WakeTimerReadLarge(TICK_TIMER);
PRINTF("\nrtimer oflw, missed ticks %u\n", ticks_late);
vAHI_WakeTimerStartLarge(TICK_TIMER, MAX_VALUE - ticks_late);
}
if(u32ItemBitmap & WAKEUP_TIMER_MASK) {
PRINTF("\nrtimer fire @ %u\n", rtimer_arch_now());
/* Compare with the current time, as after sleep there is
* a fake interrupt generated 10ms earlier to wake up & reinitialize
* the system before the actual rtimer fires.
*/
rtimer_clock_t now = rtimer_arch_now();
if(RTIMER_CLOCK_LT(now + 1, scheduled_time)) {
vAHI_WakeTimerEnable(WAKEUP_TIMER, TRUE);
vAHI_WakeTimerStartLarge(WAKEUP_TIMER, scheduled_time - now);
} else {
has_next = 0;
watchdog_start();
rtimer_run_next();
process_nevents();
}
}
ENERGEST_OFF(ENERGEST_TYPE_IRQ);
}
/*---------------------------------------------------------------------------*/
void
rtimer_arch_init(void)
{
/* Initialise tick timer to run continuously */
vAHI_TickTimerIntEnable(0);
vAHI_TickTimerConfigure(E_AHI_TICK_TIMER_DISABLE);
vAHI_TickTimerWrite(0);
vAHI_TickTimerConfigure(E_AHI_TICK_TIMER_CONT);
vAHI_SysCtrlRegisterCallback(timerISR);
/* set the highest priority for the rtimer interrupt */
vAHI_InterruptSetPriority(MICRO_ISR_MASK_SYSCTRL, 15);
/* enable interrupt on a rtimer */
vAHI_WakeTimerEnable(WAKEUP_TIMER, TRUE);
/* enable interrupt on 32-bit overflow */
vAHI_WakeTimerEnable(TICK_TIMER, TRUE);
/* count down from START_VALUE */
vAHI_WakeTimerStartLarge(TICK_TIMER, START_VALUE);
(void)u32AHI_Init();
}
/*---------------------------------------------------------------------------*/
void
rtimer_arch_reinit(rtimer_clock_t sleep_start, rtimer_clock_t sleep_ticks)
{
uint64_t t;
uint32_t wakeup_time = sleep_start + (uint64_t)sleep_ticks * (F_CPU / 2) / RTIMER_SECOND;
/* Initialise tick timer to run continuously */
vAHI_TickTimerConfigure(E_AHI_TICK_TIMER_DISABLE);
vAHI_TickTimerIntEnable(0);
WAIT_FOR_EDGE(t);
vAHI_TickTimerWrite(wakeup_time);
vAHI_TickTimerConfigure(E_AHI_TICK_TIMER_CONT);
/* call pending interrupts */
(void)u32AHI_Init();
if(has_next) {
/* reschedule the timer */
rtimer_arch_schedule(scheduled_time);
}
}
/*---------------------------------------------------------------------------*/
rtimer_clock_t
rtimer_arch_now(void)
{
return START_VALUE - (rtimer_clock_t)u64AHI_WakeTimerReadLarge(TICK_TIMER);
}
/*---------------------------------------------------------------------------*/
void
rtimer_arch_schedule(rtimer_clock_t t)
{
PRINTF("rtimer_arch_schedule time %lu\n", t);
vAHI_WakeTimerEnable(WAKEUP_TIMER, TRUE);
vAHI_WakeTimerStartLarge(WAKEUP_TIMER, t - rtimer_arch_now());
scheduled_time = t;
has_next = 1;
}
/*---------------------------------------------------------------------------*/
rtimer_clock_t
rtimer_arch_time_to_rtimer(void)
{
rtimer_clock_t now = RTIMER_NOW();
if(has_next) {
return scheduled_time >= now ? scheduled_time - now : 0;
}
/* if no wakeup is scheduled yet return maximum time */
return (rtimer_clock_t)-1;
}
/*---------------------------------------------------------------------------*/
#endif /* RTIMER_USE_32KHZ */