| /* |
| * 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, ¤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) */ |