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