diff options
Diffstat (limited to 'zephyr/drivers/cros_rtc/cros_rtc_npcx.c')
| -rw-r--r-- | zephyr/drivers/cros_rtc/cros_rtc_npcx.c | 241 |
1 files changed, 0 insertions, 241 deletions
diff --git a/zephyr/drivers/cros_rtc/cros_rtc_npcx.c b/zephyr/drivers/cros_rtc/cros_rtc_npcx.c deleted file mode 100644 index 0ecbe5f47c..0000000000 --- a/zephyr/drivers/cros_rtc/cros_rtc_npcx.c +++ /dev/null @@ -1,241 +0,0 @@ -/* - * Copyright 2021 Google LLC - * - * SPDX-License-Identifier: Apache-2.0 - */ - -#define DT_DRV_COMPAT nuvoton_npcx_cros_mtc - -#include <assert.h> -#include <drivers/cros_rtc.h> -#include <drivers/gpio.h> -#include <kernel.h> -#include <soc.h> -#include <soc/nuvoton_npcx/reg_def_cros.h> - -#include "ec_tasks.h" -#include "soc_miwu.h" -#include "task.h" - -#include <logging/log.h> -LOG_MODULE_REGISTER(cros_rtc, LOG_LEVEL_ERR); - -#define NPCX_MTC_TTC_LOAD_DELAY_US 250 /* Delay after writing TTC */ -#define NPCX_MTC_ALARM_MASK GENMASK(24, 0) /* Valid field of alarm in WTC */ - -/* Driver config */ -struct cros_rtc_npcx_config { - /* Monotonic counter base address */ - uintptr_t base; - /* Monotonic counter wake-up input source configuration */ - const struct npcx_wui mtc_alarm; -}; - -/* Driver data */ -struct cros_rtc_npcx_data { - /* Monotonic counter wake-up callback object */ - struct miwu_dev_callback miwu_mtc_cb; - cros_rtc_alarm_callback_t alarm_callback; -}; - -/* Driver convenience defines */ -#define DRV_CONFIG(dev) ((const struct cros_rtc_npcx_config *)(dev)->config) - -#define DRV_DATA(dev) ((struct cros_rtc_npcx_data *)(dev)->data) - -#define HAL_INSTANCE(dev) (struct mtc_reg *)(DRV_CONFIG(dev)->base) - -/* Counter internal local functions */ -static uint32_t counter_npcx_get_val(const struct device *dev) -{ - struct mtc_reg *const inst = HAL_INSTANCE(dev); - - /* - * Get value of monotonic counter which keeps counting when VCC1 power - * domain exists (Unit:sec) - */ - return inst->TTC; -} - -static void counter_npcx_set_val(const struct device *dev, uint32_t val) -{ - struct mtc_reg *const inst = HAL_INSTANCE(dev); - - /* - * Set monotonic counter. Write it twice to ensure the value latch to - * TTC register. A delay (~250 us) is also needed before writing again. - */ - inst->TTC = val; - k_busy_wait(NPCX_MTC_TTC_LOAD_DELAY_US); - - inst->TTC = val; - k_busy_wait(NPCX_MTC_TTC_LOAD_DELAY_US); -} - -static uint32_t counter_npcx_get_alarm_val(const struct device *dev) -{ - struct mtc_reg *const inst = HAL_INSTANCE(dev); - - /* - * If alarm is not set or it is set and has already gone off, return - * zero directly. - */ - if (!IS_BIT_SET(inst->WTC, NPCX_WTC_WIE) || - IS_BIT_SET(inst->WTC, NPCX_WTC_PTO)) { - return 0; - } - - /* Return 25-bit alarm value */ - return inst->WTC & NPCX_MTC_ALARM_MASK; -} - -static void counter_npcx_set_alarm_val(const struct device *dev, uint32_t val) -{ - struct mtc_reg *const inst = HAL_INSTANCE(dev); - - /* Disable alarm interrupt */ - inst->WTC &= ~BIT(NPCX_WTC_WIE); - - /* Set new alarm value */ - inst->WTC = val & NPCX_MTC_ALARM_MASK; - - /* Enable alarm interrupt */ - inst->WTC |= BIT(NPCX_WTC_WIE); -} - -static void counter_npcx_reset_alarm(const struct device *dev) -{ - struct mtc_reg *const inst = HAL_INSTANCE(dev); - - /* Disable alarm interrupt first */ - if (IS_BIT_SET(inst->WTC, NPCX_WTC_WIE)) { - inst->WTC &= ~BIT(NPCX_WTC_WIE); - } - - /* Set alarm to maximum value and clear its pending bit */ - if (IS_BIT_SET(inst->WTC, NPCX_WTC_PTO)) { - inst->WTC = NPCX_MTC_ALARM_MASK; - inst->WTC |= BIT(NPCX_WTC_PTO); - } -} - -/* Counter local functions */ -static void counter_npcx_isr(const struct device *dev, struct npcx_wui *wui) -{ - struct cros_rtc_npcx_data *data = DRV_DATA(dev); - - LOG_DBG("%s", __func__); - - /* Alarm is one-shot, so reset alarm to default */ - counter_npcx_reset_alarm(dev); - - /* Call callback function */ - if (data->alarm_callback) { - data->alarm_callback(dev); - } -} - -/* cros ec RTC api functions */ -static int cros_rtc_npcx_configure(const struct device *dev, - cros_rtc_alarm_callback_t callback) -{ - struct cros_rtc_npcx_data *data = DRV_DATA(dev); - - if (callback == NULL) { - return -EINVAL; - } - - data->alarm_callback = callback; - return 0; -} - -static int cros_rtc_npcx_get_value(const struct device *dev, uint32_t *value) -{ - *value = counter_npcx_get_val(dev); - - return 0; -} - -static int cros_rtc_npcx_set_value(const struct device *dev, uint32_t value) -{ - counter_npcx_set_val(dev, value); - - return 0; -} -static int cros_rtc_npcx_get_alarm(const struct device *dev, uint32_t *seconds, - uint32_t *microseconds) -{ - *seconds = counter_npcx_get_alarm_val(dev); - *microseconds = 0; - - return 0; -} -static int cros_rtc_npcx_set_alarm(const struct device *dev, uint32_t seconds, - uint32_t microseconds) -{ - const struct cros_rtc_npcx_config *config = DRV_CONFIG(dev); - ARG_UNUSED(microseconds); - - /* Enable interrupt of the MTC alarm wake-up input source */ - npcx_miwu_irq_enable(&config->mtc_alarm); - - /* Make sure alarm restore to default state */ - counter_npcx_reset_alarm(dev); - counter_npcx_set_alarm_val(dev, seconds); - - return 0; -} - -static int cros_rtc_npcx_reset_alarm(const struct device *dev) -{ - const struct cros_rtc_npcx_config *config = DRV_CONFIG(dev); - - /* Disable interrupt of the MTC alarm wake-up input source */ - npcx_miwu_irq_disable(&config->mtc_alarm); - - counter_npcx_reset_alarm(dev); - - return 0; -} - -/* cros ec RTC driver registration */ -static const struct cros_rtc_driver_api cros_rtc_npcx_driver_api = { - .configure = cros_rtc_npcx_configure, - .get_value = cros_rtc_npcx_get_value, - .set_value = cros_rtc_npcx_set_value, - .get_alarm = cros_rtc_npcx_get_alarm, - .set_alarm = cros_rtc_npcx_set_alarm, - .reset_alarm = cros_rtc_npcx_reset_alarm, -}; - -static int cros_rtc_npcx_init(const struct device *dev) -{ - const struct cros_rtc_npcx_config *config = DRV_CONFIG(dev); - struct cros_rtc_npcx_data *data = DRV_DATA(dev); - - /* Initialize the miwu input and its callback for monotonic counter */ - npcx_miwu_init_dev_callback(&data->miwu_mtc_cb, &config->mtc_alarm, - counter_npcx_isr, dev); - npcx_miwu_manage_dev_callback(&data->miwu_mtc_cb, true); - - /* - * Configure the monotonic counter wake-up event triggered from a rising - * edge on its signal. - */ - npcx_miwu_interrupt_configure(&config->mtc_alarm, NPCX_MIWU_MODE_EDGE, - NPCX_MIWU_TRIG_HIGH); - - return 0; -} - -static const struct cros_rtc_npcx_config cros_rtc_npcx_cfg_0 = { - .base = DT_INST_REG_ADDR(0), - .mtc_alarm = NPCX_DT_WUI_ITEM_BY_NAME(0, mtc_alarm) -}; - -static struct cros_rtc_npcx_data cros_rtc_npcx_data_0; - -DEVICE_DT_INST_DEFINE(0, cros_rtc_npcx_init, /* pm_control_fn= */ NULL, - &cros_rtc_npcx_data_0, &cros_rtc_npcx_cfg_0, POST_KERNEL, - CONFIG_KERNEL_INIT_PRIORITY_DEVICE, - &cros_rtc_npcx_driver_api); |