342 lines
8.1 KiB
C
342 lines
8.1 KiB
C
/*
|
|
* Copyright (c) 2021 Basalte bv
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
#define DT_DRV_COMPAT nxp_imx_snvs_rtc
|
|
#include <zephyr/logging/log.h>
|
|
|
|
LOG_MODULE_REGISTER(mcux_snvs, CONFIG_COUNTER_LOG_LEVEL);
|
|
|
|
#if CONFIG_COUNTER_MCUX_SNVS_SRTC
|
|
#define MCUX_SNVS_SRTC
|
|
#define MCUX_SNVS_NUM_CHANNELS 2
|
|
#else
|
|
#define MCUX_SNVS_NUM_CHANNELS 1
|
|
#endif
|
|
|
|
#include <zephyr/drivers/counter.h>
|
|
#include <fsl_snvs_hp.h>
|
|
|
|
#ifdef MCUX_SNVS_SRTC
|
|
#include <fsl_snvs_lp.h>
|
|
#endif
|
|
|
|
struct mcux_snvs_config {
|
|
/* info must be first element */
|
|
struct counter_config_info info;
|
|
SNVS_Type *base;
|
|
void (*irq_config_func)(const struct device *dev);
|
|
};
|
|
|
|
struct mcux_snvs_data {
|
|
counter_alarm_callback_t alarm_hp_rtc_callback;
|
|
void *alarm_hp_rtc_user_data;
|
|
#ifdef MCUX_SNVS_SRTC
|
|
counter_alarm_callback_t alarm_lp_srtc_callback;
|
|
void *alarm_lp_srtc_user_data;
|
|
#endif
|
|
};
|
|
|
|
static int mcux_snvs_start(const struct device *dev)
|
|
{
|
|
ARG_UNUSED(dev);
|
|
|
|
return -EALREADY;
|
|
}
|
|
|
|
static int mcux_snvs_stop(const struct device *dev)
|
|
{
|
|
ARG_UNUSED(dev);
|
|
|
|
return -ENOTSUP;
|
|
}
|
|
|
|
static int mcux_snvs_get_value(const struct device *dev, uint32_t *ticks)
|
|
{
|
|
const struct mcux_snvs_config *config = dev->config;
|
|
uint32_t tmp = 0;
|
|
|
|
do {
|
|
*ticks = tmp;
|
|
tmp = (config->base->HPRTCMR << 17U);
|
|
tmp |= (config->base->HPRTCLR >> 15U);
|
|
} while (*ticks != tmp);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mcux_snvs_set_alarm(const struct device *dev,
|
|
uint8_t chan_id,
|
|
const struct counter_alarm_cfg *alarm_cfg)
|
|
{
|
|
const struct mcux_snvs_config *config = dev->config;
|
|
struct mcux_snvs_data *data = dev->data;
|
|
|
|
uint32_t current, ticks;
|
|
|
|
mcux_snvs_get_value(dev, ¤t);
|
|
ticks = alarm_cfg->ticks;
|
|
|
|
if ((alarm_cfg->flags & COUNTER_ALARM_CFG_ABSOLUTE) == 0) {
|
|
ticks += current;
|
|
}
|
|
|
|
if (ticks < current) {
|
|
LOG_ERR("Invalid alarm ticks");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (chan_id == 0) {
|
|
if (data->alarm_hp_rtc_callback) {
|
|
return -EBUSY;
|
|
}
|
|
data->alarm_hp_rtc_callback = alarm_cfg->callback;
|
|
data->alarm_hp_rtc_user_data = alarm_cfg->user_data;
|
|
|
|
/* disable RTC alarm interrupt */
|
|
config->base->HPCR &= ~SNVS_HPCR_HPTA_EN_MASK;
|
|
while ((config->base->HPCR & SNVS_HPCR_HPTA_EN_MASK) != 0U) {
|
|
}
|
|
|
|
/* Set alarm in seconds*/
|
|
config->base->HPTAMR = (uint32_t)(ticks >> 17U);
|
|
config->base->HPTALR = (uint32_t)(ticks << 15U);
|
|
|
|
/* enable RTC alarm interrupt */
|
|
config->base->HPCR |= SNVS_HPCR_HPTA_EN_MASK;
|
|
#ifdef MCUX_SNVS_SRTC
|
|
} else if (chan_id == 1) {
|
|
if (data->alarm_lp_srtc_callback) {
|
|
return -EBUSY;
|
|
}
|
|
data->alarm_lp_srtc_callback = alarm_cfg->callback;
|
|
data->alarm_lp_srtc_user_data = alarm_cfg->user_data;
|
|
|
|
/* disable SRTC alarm interrupt */
|
|
config->base->LPCR &= ~SNVS_LPCR_LPTA_EN_MASK;
|
|
while ((config->base->LPCR & SNVS_LPCR_LPTA_EN_MASK) != 0U) {
|
|
}
|
|
|
|
/* Set alarm in seconds*/
|
|
config->base->LPTAR = ticks;
|
|
|
|
/* enable SRTC alarm interrupt */
|
|
config->base->LPCR |= SNVS_LPCR_LPTA_EN_MASK;
|
|
#endif
|
|
} else {
|
|
LOG_ERR("Invalid channel id");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mcux_snvs_cancel_alarm(const struct device *dev,
|
|
uint8_t chan_id)
|
|
{
|
|
const struct mcux_snvs_config *config = dev->config;
|
|
struct mcux_snvs_data *data = dev->data;
|
|
|
|
if (chan_id == 0) {
|
|
/* disable RTC alarm interrupt */
|
|
config->base->HPCR &= ~SNVS_HPCR_HPTA_EN_MASK;
|
|
while ((config->base->HPCR & SNVS_HPCR_HPTA_EN_MASK) != 0U) {
|
|
}
|
|
|
|
/* clear callback */
|
|
data->alarm_hp_rtc_callback = NULL;
|
|
|
|
#ifdef MCUX_SNVS_SRTC
|
|
} else if (chan_id == 1) {
|
|
/* disable SRTC alarm interrupt */
|
|
config->base->LPCR &= ~SNVS_LPCR_LPTA_EN_MASK;
|
|
while ((config->base->LPCR & SNVS_LPCR_LPTA_EN_MASK) != 0U) {
|
|
}
|
|
|
|
/* clear callback */
|
|
data->alarm_lp_srtc_callback = NULL;
|
|
#endif
|
|
} else {
|
|
LOG_ERR("Invalid channel id");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mcux_snvs_set_top_value(const struct device *dev,
|
|
const struct counter_top_cfg *cfg)
|
|
{
|
|
ARG_UNUSED(dev);
|
|
ARG_UNUSED(cfg);
|
|
|
|
return -ENOTSUP;
|
|
}
|
|
|
|
static uint32_t mcux_snvs_get_pending_int(const struct device *dev)
|
|
{
|
|
const struct mcux_snvs_config *config = dev->config;
|
|
uint32_t flags;
|
|
|
|
flags = SNVS_HP_RTC_GetStatusFlags(config->base) & kSNVS_RTC_AlarmInterruptFlag;
|
|
|
|
#ifdef MCUX_SNVS_SRTC
|
|
flags |= SNVS_LP_SRTC_GetStatusFlags(config->base) & kSNVS_SRTC_AlarmInterruptFlag;
|
|
#endif
|
|
|
|
return flags;
|
|
}
|
|
|
|
static uint32_t mcux_snvs_get_top_value(const struct device *dev)
|
|
{
|
|
ARG_UNUSED(dev);
|
|
|
|
return UINT32_MAX;
|
|
}
|
|
|
|
void mcux_snvs_isr(const struct device *dev)
|
|
{
|
|
const struct mcux_snvs_config *config = dev->config;
|
|
struct mcux_snvs_data *data = dev->data;
|
|
|
|
uint32_t current;
|
|
|
|
mcux_snvs_get_value(dev, ¤t);
|
|
|
|
if (SNVS_HP_RTC_GetStatusFlags(config->base) & kSNVS_RTC_AlarmInterruptFlag) {
|
|
/* Clear alarm flag */
|
|
SNVS_HP_RTC_ClearStatusFlags(config->base, kSNVS_RTC_AlarmInterruptFlag);
|
|
|
|
if (data->alarm_hp_rtc_callback) {
|
|
data->alarm_hp_rtc_callback(dev, 0, current, data->alarm_hp_rtc_user_data);
|
|
|
|
mcux_snvs_cancel_alarm(dev, 0);
|
|
}
|
|
}
|
|
|
|
#ifdef MCUX_SNVS_SRTC
|
|
if (SNVS_LP_SRTC_GetStatusFlags(config->base) & kSNVS_SRTC_AlarmInterruptFlag) {
|
|
/* Clear alarm flag */
|
|
SNVS_LP_SRTC_ClearStatusFlags(config->base, kSNVS_SRTC_AlarmInterruptFlag);
|
|
|
|
if (data->alarm_lp_srtc_callback) {
|
|
data->alarm_lp_srtc_callback(dev, 1, current,
|
|
data->alarm_lp_srtc_user_data);
|
|
mcux_snvs_cancel_alarm(dev, 1);
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
int mcux_snvs_rtc_set(const struct device *dev, uint32_t ticks)
|
|
{
|
|
const struct mcux_snvs_config *config = dev->config;
|
|
|
|
#ifdef MCUX_SNVS_SRTC
|
|
SNVS_LP_SRTC_StopTimer(config->base);
|
|
|
|
config->base->LPSRTCMR = (uint32_t)(ticks >> 17U);
|
|
config->base->LPSRTCLR = (uint32_t)(ticks << 15U);
|
|
|
|
SNVS_LP_SRTC_StartTimer(config->base);
|
|
/* Sync to our high power RTC */
|
|
SNVS_HP_RTC_TimeSynchronize(config->base);
|
|
#else
|
|
SNVS_HP_RTC_StopTimer(config->base);
|
|
|
|
config->base->HPRTCMR = (uint32_t)(ticks >> 17U);
|
|
config->base->HPRTCLR = (uint32_t)(ticks << 15U);
|
|
|
|
SNVS_HP_RTC_StartTimer(config->base);
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mcux_snvs_init(const struct device *dev)
|
|
{
|
|
const struct mcux_snvs_config *config = dev->config;
|
|
|
|
snvs_hp_rtc_config_t hp_rtc_config;
|
|
|
|
#ifdef MCUX_SNVS_SRTC
|
|
snvs_lp_srtc_config_t lp_srtc_config;
|
|
#endif
|
|
|
|
SNVS_HP_RTC_GetDefaultConfig(&hp_rtc_config);
|
|
SNVS_HP_RTC_Init(config->base, &hp_rtc_config);
|
|
|
|
#ifdef MCUX_SNVS_SRTC
|
|
/* Reset power glitch detector */
|
|
SNVS_LP_Init(config->base);
|
|
/* Init SRTC to default config */
|
|
SNVS_LP_SRTC_GetDefaultConfig(&lp_srtc_config);
|
|
SNVS_LP_SRTC_Init(config->base, &lp_srtc_config);
|
|
|
|
#if CONFIG_COUNTER_MCUX_SNVS_SRTC_WAKE
|
|
config->base->LPCR |= SNVS_LPCR_LPWUI_EN_MASK;
|
|
#endif
|
|
|
|
/* RTC should always run */
|
|
SNVS_LP_SRTC_StartTimer(config->base);
|
|
SNVS_HP_RTC_TimeSynchronize(config->base);
|
|
#endif
|
|
|
|
/* RTC should always run */
|
|
SNVS_HP_RTC_StartTimer(config->base);
|
|
|
|
config->irq_config_func(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct counter_driver_api mcux_snvs_driver_api = {
|
|
.start = mcux_snvs_start,
|
|
.stop = mcux_snvs_stop,
|
|
.get_value = mcux_snvs_get_value,
|
|
.set_alarm = mcux_snvs_set_alarm,
|
|
.cancel_alarm = mcux_snvs_cancel_alarm,
|
|
.set_top_value = mcux_snvs_set_top_value,
|
|
.get_pending_int = mcux_snvs_get_pending_int,
|
|
.get_top_value = mcux_snvs_get_top_value,
|
|
};
|
|
|
|
/*
|
|
* This driver is single-instance. If the devicetree contains multiple
|
|
* instances, this will fail and the driver needs to be revisited.
|
|
*/
|
|
BUILD_ASSERT(DT_NUM_INST_STATUS_OKAY(DT_DRV_COMPAT) <= 1,
|
|
"unsupported snvs instance");
|
|
|
|
#if DT_NODE_HAS_STATUS(DT_DRV_INST(0), okay)
|
|
static struct mcux_snvs_data mcux_snvs_data_0;
|
|
|
|
static void mcux_snvs_irq_config_0(const struct device *dev);
|
|
|
|
static struct mcux_snvs_config mcux_snvs_config_0 = {
|
|
.info = {
|
|
.max_top_value = 0,
|
|
.freq = 1,
|
|
.channels = MCUX_SNVS_NUM_CHANNELS,
|
|
.flags = COUNTER_CONFIG_INFO_COUNT_UP,
|
|
},
|
|
.base = (SNVS_Type *)DT_REG_ADDR(DT_INST_PARENT(0)),
|
|
.irq_config_func = mcux_snvs_irq_config_0,
|
|
};
|
|
|
|
DEVICE_DT_INST_DEFINE(0, &mcux_snvs_init, NULL,
|
|
&mcux_snvs_data_0,
|
|
&mcux_snvs_config_0,
|
|
POST_KERNEL, CONFIG_COUNTER_INIT_PRIORITY,
|
|
&mcux_snvs_driver_api);
|
|
|
|
static void mcux_snvs_irq_config_0(const struct device *dev)
|
|
{
|
|
IRQ_CONNECT(DT_INST_IRQN(0), DT_INST_IRQ(0, priority),
|
|
mcux_snvs_isr, DEVICE_DT_INST_GET(0), 0);
|
|
irq_enable(DT_INST_IRQN(0));
|
|
}
|
|
#endif /* DT_NODE_HAS_STATUS(DT_DRV_INST(0), okay) */
|