* arch/arm/src/nrf91/nrf91_rtc.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <assert.h>
#include <debug.h>
#include <nuttx/arch.h>
#include <nuttx/irq.h>
#include "arm_internal.h"
#include "hardware/nrf91_rtc.h"
#include "nrf91_rtc.h"
* Pre-processor Definitions
****************************************************************************/
* Private Types
****************************************************************************/
struct nrf91_rtc_priv_s
{
struct nrf91_rtc_ops_s *ops;
uint32_t base;
uint32_t irq;
uint8_t chan;
bool inuse;
};
* Private Function Prototypes
****************************************************************************/
static uint32_t nrf91_rtc_getreg(struct nrf91_rtc_dev_s *dev,
uint32_t offset);
static void nrf91_rtc_putreg(struct nrf91_rtc_dev_s *dev,
uint32_t offset,
uint32_t value);
static uint32_t nrf91_rtc_irq2reg(struct nrf91_rtc_dev_s *dev,
uint8_t s);
static uint32_t nrf91_rtc_evt2reg(struct nrf91_rtc_dev_s *dev,
uint8_t evt);
static int nrf91_rtc_start(struct nrf91_rtc_dev_s *dev);
static int nrf91_rtc_stop(struct nrf91_rtc_dev_s *dev);
static int nrf91_rtc_clear(struct nrf91_rtc_dev_s *dev);
static int nrf91_rtc_trgovrflw(struct nrf91_rtc_dev_s *dev);
static int nrf91_rtc_getcounter(struct nrf91_rtc_dev_s *dev,
uint32_t *cc);
static int nrf91_rtc_setcc(struct nrf91_rtc_dev_s *dev, uint8_t i,
uint32_t cc);
static int nrf91_rtc_getcc(struct nrf91_rtc_dev_s *dev, uint8_t i,
uint32_t *cc);
static int nrf91_rtc_setpre(struct nrf91_rtc_dev_s *dev, uint16_t pre);
static int nrf91_rtc_setisr(struct nrf91_rtc_dev_s *dev, xcpt_t handler,
void * arg);
static int nrf91_rtc_enableint(struct nrf91_rtc_dev_s *dev, uint8_t s);
static int nrf91_rtc_disableint(struct nrf91_rtc_dev_s *dev, uint8_t s);
static int nrf91_rtc_checkint(struct nrf91_rtc_dev_s *dev, uint8_t s);
static int nrf91_rtc_ackint(struct nrf91_rtc_dev_s *dev, uint8_t s);
static int nrf91_rtc_enableevt(struct nrf91_rtc_dev_s *dev, uint8_t evt);
static int nrf91_rtc_disableevt(struct nrf91_rtc_dev_s *dev,
uint8_t evt);
static uint32_t nrf91_rtc_getbase(struct nrf91_rtc_dev_s *dev);
* Private Data
****************************************************************************/
struct nrf91_rtc_ops_s nrf91_rtc_ops =
{
.start = nrf91_rtc_start,
.stop = nrf91_rtc_stop,
.clear = nrf91_rtc_clear,
.trgovrflw = nrf91_rtc_trgovrflw,
.getcounter = nrf91_rtc_getcounter,
.setcc = nrf91_rtc_setcc,
.getcc = nrf91_rtc_getcc,
.setpre = nrf91_rtc_setpre,
.setisr = nrf91_rtc_setisr,
.enableint = nrf91_rtc_enableint,
.disableint = nrf91_rtc_disableint,
.checkint = nrf91_rtc_checkint,
.ackint = nrf91_rtc_ackint,
.enableevt = nrf91_rtc_enableevt,
.disableevt = nrf91_rtc_disableevt,
.getbase = nrf91_rtc_getbase,
};
#ifdef CONFIG_NRF91_RTC0
struct nrf91_rtc_priv_s g_nrf91_rtc0_priv =
{
.ops = &nrf91_rtc_ops,
.base = NRF91_RTC0_BASE,
.irq = NRF91_IRQ_RTC0,
.chan = 4,
.inuse = false,
};
#endif
#ifdef CONFIG_NRF91_RTC1
struct nrf91_rtc_priv_s g_nrf91_rtc1_priv =
{
.ops = &nrf91_rtc_ops,
.base = NRF91_RTC1_BASE,
.irq = NRF91_IRQ_RTC1,
.chan = 4,
.inuse = false,
};
#endif
* Private Functions
****************************************************************************/
* Name: nrf91_rtc_getreg
*
* Description:
* Get a 32-bit register value by offset
*
****************************************************************************/
static uint32_t nrf91_rtc_getreg(struct nrf91_rtc_dev_s *dev,
uint32_t offset)
{
DEBUGASSERT(dev);
return getreg32(((struct nrf91_rtc_priv_s *)dev)->base + offset);
}
* Name: nrf91_rtc_putreg
*
* Description:
* Put a 32-bit register value by offset
*
****************************************************************************/
static void nrf91_rtc_putreg(struct nrf91_rtc_dev_s *dev,
uint32_t offset,
uint32_t value)
{
DEBUGASSERT(dev);
putreg32(value, ((struct nrf91_rtc_priv_s *)dev)->base + offset);
}
* Name: nrf91_rtc_irq2reg
*
* Description:
* Get the value of the interrupt register corresponding to the given
* interrupt source
*
****************************************************************************/
static uint32_t nrf91_rtc_irq2reg(struct nrf91_rtc_dev_s *dev, uint8_t s)
{
uint32_t regval = 0;
switch (s)
{
case NRF91_RTC_EVT_TICK:
{
regval = RTC_INT_TICK;
break;
}
case NRF91_RTC_EVT_OVRFLW:
{
regval = RTC_INT_OVRFLW;
break;
}
case NRF91_RTC_EVT_COMPARE0:
{
regval = RTC_INT_COMPARE(0);
break;
}
case NRF91_RTC_EVT_COMPARE1:
{
regval = RTC_INT_COMPARE(1);
break;
}
case NRF91_RTC_EVT_COMPARE2:
{
regval = RTC_INT_COMPARE(2);
break;
}
case NRF91_RTC_EVT_COMPARE3:
{
regval = RTC_INT_COMPARE(3);
break;
}
default:
{
rtcerr("ERROR: unsupported IRQ source %d\n", s);
regval = 0;
goto errout;
}
}
errout:
return regval;
}
* Name: nrf91_rtc_evt2reg
*
* Description:
* Get the offset of the event register corresponding to the given event
*
****************************************************************************/
static uint32_t nrf91_rtc_evt2reg(struct nrf91_rtc_dev_s *dev,
uint8_t evt)
{
uint32_t regval;
switch (evt)
{
case NRF91_RTC_EVT_TICK:
{
regval = RTC_EVTEN_TICK;
break;
}
case NRF91_RTC_EVT_OVRFLW:
{
regval = RTC_EVTEN_OVRFLW;
break;
}
case NRF91_RTC_EVT_COMPARE0:
{
regval = RTC_EVTEN_COMPARE(0);
break;
}
case NRF91_RTC_EVT_COMPARE1:
{
regval = RTC_EVTEN_COMPARE(1);
break;
}
case NRF91_RTC_EVT_COMPARE2:
{
regval = RTC_EVTEN_COMPARE(2);
break;
}
case NRF91_RTC_EVT_COMPARE3:
{
regval = RTC_EVTEN_COMPARE(3);
break;
}
default:
{
rtcerr("ERROR: unsupported EVENT %d\n", evt);
regval = 0;
goto errout;
}
}
errout:
return regval;
}
* Name: nrf91_rtc_start
****************************************************************************/
static int nrf91_rtc_start(struct nrf91_rtc_dev_s *dev)
{
DEBUGASSERT(dev);
nrf91_rtc_putreg(dev, NRF91_RTC_TASKS_START_OFFSET, RTC_TASKS_START);
return OK;
}
* Name: nrf91_rtc_stop
****************************************************************************/
static int nrf91_rtc_stop(struct nrf91_rtc_dev_s *dev)
{
DEBUGASSERT(dev);
nrf91_rtc_putreg(dev, NRF91_RTC_TASKS_STOP_OFFSET, RTC_TASKS_STOP);
return OK;
}
* Name: nrf91_rtc_clear
****************************************************************************/
static int nrf91_rtc_clear(struct nrf91_rtc_dev_s *dev)
{
DEBUGASSERT(dev);
nrf91_rtc_putreg(dev, NRF91_RTC_TASKS_CLEAR_OFFSET, RTC_TASKS_CLEAR);
return OK;
}
* Name: nrf91_rtc_trgovrflw
****************************************************************************/
static int nrf91_rtc_trgovrflw(struct nrf91_rtc_dev_s *dev)
{
DEBUGASSERT(dev);
nrf91_rtc_putreg(dev, NRF91_RTC_TASKS_TRIGOVRFLW_OFFSET,
RTC_TASKS_TRIGOVRFLW);
return OK;
}
static int nrf91_rtc_getcounter(struct nrf91_rtc_dev_s *dev,
uint32_t *ctr)
{
DEBUGASSERT(dev);
DEBUGASSERT(ctr);
*ctr = nrf91_rtc_getreg(dev, NRF91_RTC_COUNTER_OFFSET);
return OK;
}
* Name: nrf91_rtc_setcc
****************************************************************************/
static int nrf91_rtc_setcc(struct nrf91_rtc_dev_s *dev, uint8_t i,
uint32_t cc)
{
struct nrf91_rtc_priv_s *rtc = NULL;
int ret = OK;
DEBUGASSERT(dev);
rtc = (struct nrf91_rtc_priv_s *)dev;
if (i > rtc->chan)
{
rtcerr("ERROR: unsupported RTCER channel %d\n", i);
ret = -EINVAL;
goto errout;
}
nrf91_rtc_putreg(dev, NRF91_RTC_CC_OFFSET(i), cc);
errout:
return ret;
}
* Name: nrf91_rtc_getcc
****************************************************************************/
static int nrf91_rtc_getcc(struct nrf91_rtc_dev_s *dev, uint8_t i,
uint32_t *cc)
{
struct nrf91_rtc_priv_s *rtc = NULL;
int ret = OK;
DEBUGASSERT(dev);
DEBUGASSERT(cc);
rtc = (struct nrf91_rtc_priv_s *)dev;
if (i > rtc->chan)
{
rtcerr("ERROR: unsupported RTCER channel %d\n", i);
ret = -EINVAL;
goto errout;
}
*cc = nrf91_rtc_getreg(dev, NRF91_RTC_CC_OFFSET(i));
errout:
return ret;
}
* Name: nrf91_rtc_setpre
****************************************************************************/
static int nrf91_rtc_setpre(struct nrf91_rtc_dev_s *dev, uint16_t pre)
{
int ret = OK;
DEBUGASSERT(dev);
if (pre > RTC_PRESCALER_MAX)
{
rtcerr("ERROR: unsupported RTC prescaler %d\n", pre);
ret = -EINVAL;
goto errout;
}
nrf91_rtc_putreg(dev, NRF91_RTC_PRESCALER_OFFSET, pre);
errout:
return ret;
}
* Name: nrf91_rtc_setisr
****************************************************************************/
static int nrf91_rtc_setisr(struct nrf91_rtc_dev_s *dev, xcpt_t handler,
void *arg)
{
struct nrf91_rtc_priv_s *rtc = NULL;
int ret = OK;
DEBUGASSERT(dev);
rtc = (struct nrf91_rtc_priv_s *)dev;
if (!handler)
{
up_disable_irq(rtc->irq);
irq_detach(rtc->irq);
ret = OK;
goto errout;
}
irq_attach(rtc->irq, handler, arg);
up_enable_irq(rtc->irq);
errout:
return ret;
}
* Name: nrf91_rtc_enableint
****************************************************************************/
static int nrf91_rtc_enableint(struct nrf91_rtc_dev_s *dev, uint8_t s)
{
uint32_t regval = 0;
int ret = OK;
DEBUGASSERT(dev);
regval = nrf91_rtc_irq2reg(dev, s);
if (regval == 0)
{
ret = -EINVAL;
goto errout;
}
nrf91_rtc_putreg(dev, NRF91_RTC_INTENSET_OFFSET, regval);
errout:
return ret;
}
* Name: nrf91_rtc_disableint
****************************************************************************/
static int nrf91_rtc_disableint(struct nrf91_rtc_dev_s *dev, uint8_t s)
{
uint32_t regval = 0;
int ret = OK;
DEBUGASSERT(dev);
regval = nrf91_rtc_irq2reg(dev, s);
if (regval == 0)
{
ret = -EINVAL;
goto errout;
}
nrf91_rtc_putreg(dev, NRF91_RTC_INTENCLR_OFFSET, regval);
errout:
return ret;
}
* Name: nrf91_rtc_checkint
****************************************************************************/
static int nrf91_rtc_checkint(struct nrf91_rtc_dev_s *dev, uint8_t s)
{
int ret = 0;
DEBUGASSERT(dev);
switch (s)
{
case NRF91_RTC_EVT_TICK:
{
ret = nrf91_rtc_getreg(dev, NRF91_RTC_EVENTS_TICK_OFFSET);
break;
}
case NRF91_RTC_EVT_OVRFLW:
{
ret = nrf91_rtc_getreg(dev, NRF91_RTC_EVENTS_OVRFLW_OFFSET);
break;
}
case NRF91_RTC_EVT_COMPARE0:
{
ret = nrf91_rtc_getreg(dev, NRF91_RTC_EVENTS_COMPARE_OFFSET(0));
break;
}
case NRF91_RTC_EVT_COMPARE1:
{
ret = nrf91_rtc_getreg(dev, NRF91_RTC_EVENTS_COMPARE_OFFSET(1));
break;
}
case NRF91_RTC_EVT_COMPARE2:
{
ret = nrf91_rtc_getreg(dev, NRF91_RTC_EVENTS_COMPARE_OFFSET(2));
break;
}
case NRF91_RTC_EVT_COMPARE3:
{
ret = nrf91_rtc_getreg(dev, NRF91_RTC_EVENTS_COMPARE_OFFSET(3));
break;
}
default:
{
rtcerr("ERROR: unsupported IRQ source %d\n", s);
ret = -EINVAL;
goto errout;
}
}
errout:
return ret;
}
* Name: nrf91_rtc_ackint
****************************************************************************/
static int nrf91_rtc_ackint(struct nrf91_rtc_dev_s *dev, uint8_t s)
{
int ret = 0;
DEBUGASSERT(dev);
switch (s)
{
case NRF91_RTC_EVT_TICK:
{
nrf91_rtc_putreg(dev, NRF91_RTC_EVENTS_TICK_OFFSET, 0);
break;
}
case NRF91_RTC_EVT_OVRFLW:
{
nrf91_rtc_putreg(dev, NRF91_RTC_EVENTS_OVRFLW_OFFSET, 0);
break;
}
case NRF91_RTC_EVT_COMPARE0:
{
nrf91_rtc_putreg(dev, NRF91_RTC_EVENTS_COMPARE_OFFSET(0), 0);
break;
}
case NRF91_RTC_EVT_COMPARE1:
{
nrf91_rtc_putreg(dev, NRF91_RTC_EVENTS_COMPARE_OFFSET(1), 0);
break;
}
case NRF91_RTC_EVT_COMPARE2:
{
nrf91_rtc_putreg(dev, NRF91_RTC_EVENTS_COMPARE_OFFSET(2), 0);
break;
}
case NRF91_RTC_EVT_COMPARE3:
{
nrf91_rtc_putreg(dev, NRF91_RTC_EVENTS_COMPARE_OFFSET(3), 0);
break;
}
default:
{
rtcerr("ERROR: unsupported IRQ source %d\n", s);
ret = -EINVAL;
goto errout;
}
}
errout:
return ret;
}
* Name: nrf91_rtc_enableevt
****************************************************************************/
static int nrf91_rtc_enableevt(struct nrf91_rtc_dev_s *dev, uint8_t evt)
{
uint32_t regval = 0;
int ret = OK;
DEBUGASSERT(dev);
regval = nrf91_rtc_evt2reg(dev, evt);
if (regval == 0)
{
ret = -EINVAL;
goto errout;
}
nrf91_rtc_putreg(dev, NRF91_RTC_EVTENSET_OFFSET, regval);
errout:
return ret;
}
* Name: nrf91_rtc_disableevt
****************************************************************************/
static int nrf91_rtc_disableevt(struct nrf91_rtc_dev_s *dev, uint8_t evt)
{
uint32_t regval = 0;
int ret = OK;
DEBUGASSERT(dev);
regval = nrf91_rtc_evt2reg(dev, evt);
if (regval == 0)
{
ret = -EINVAL;
goto errout;
}
nrf91_rtc_putreg(dev, NRF91_RTC_EVTENCLR_OFFSET, regval);
errout:
return ret;
}
* Name: nrf91_rtc_getbase
****************************************************************************/
static uint32_t nrf91_rtc_getbase(struct nrf91_rtc_dev_s *dev)
{
struct nrf91_rtc_priv_s *rtc = (struct nrf91_rtc_priv_s *)dev;
DEBUGASSERT(dev);
return rtc->base;
}
* Public Functions
****************************************************************************/
* Name: nrf91_rtc_init
*
* Description:
* Initialize RTC device
*
****************************************************************************/
struct nrf91_rtc_dev_s *nrf91_rtc_init(int rtc)
{
struct nrf91_rtc_priv_s *priv = NULL;
switch (rtc)
{
#ifdef CONFIG_NRF91_RTC0
case 0:
{
priv = &g_nrf91_rtc0_priv;
break;
}
#endif
#ifdef CONFIG_NRF91_RTC1
case 1:
{
priv = &g_nrf91_rtc1_priv;
break;
}
#endif
default:
{
rtcerr("ERROR: unsupported RTC %d\n", rtc);
goto errout;
}
}
if (priv->inuse != false)
{
priv = NULL;
}
errout:
return (struct nrf91_rtc_dev_s *)priv;
}
* Name: nrf91_rtc_deinit
*
* Description:
* Deinit RTC device
*
****************************************************************************/
int nrf91_rtc_deinit(struct nrf91_rtc_dev_s *dev)
{
struct nrf91_rtc_priv_s *rtc = NULL;
DEBUGASSERT(dev);
rtc = (struct nrf91_rtc_priv_s *)dev;
rtc->inuse = false;
return OK;
}