blob: 3346cc21e75e68b2c949074e4f34c5bf0aebb9b6 [file] [log] [blame] [edit]
/*
* 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 <zephyr/irq.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, &current);
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, &current);
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) */