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/*
* Copyright (C) 2017-2024 Alibaba Group Holding Limited
*/
/*******************************************************
* @file dw_timer.c
* @brief source file for timer csi driver
* @version V1.0
* @date 28. Apr 2020
* ******************************************************/
#include <csi_config.h>
#include <drv/timer.h>
#include <drv/irq.h>
#include "dw_timer_ll.h"
/**
\brief Timer interrupt handling function
\param[in] arg Callback function member variables
\return None
*/
void dw_timer_irq_handler(void *arg)
{
csi_timer_t *timer = (csi_timer_t *)arg;
dw_timer_regs_t *timer_base = (dw_timer_regs_t *)timer->dev.reg_base;
if (dw_timer_get_int_status(timer_base)) {
if (timer->callback) {
timer->callback(timer, timer->arg);
}
dw_timer_clear_irq(timer_base);
}
}
#if CONFIG_SUPPORT_NMI_DEMO
void timer_clear_irq()
{
dw_timer_clear_irq((dw_timer_regs_t*)DW_TIMER4_BASE);
}
#endif
/**
\brief Initialize TIMER Interface. 1. Initializes the resources needed for the TIMER interface 2.registers callback function
\param[in] timer handle timer handle to operate
\param[in] idx timer index
\return error code \ref csi_error_t
*/
csi_error_t csi_timer_init(csi_timer_t *timer, uint32_t idx)
{
CSI_PARAM_CHK(timer, CSI_ERROR);
csi_error_t ret = CSI_OK;
dw_timer_regs_t *timer_base = NULL;
if (0 == target_get(DEV_DW_TIMER_TAG, idx, &timer->dev)) {
timer_base = (dw_timer_regs_t *)HANDLE_REG_BASE(timer);
memset((void *)timer_base, 0, sizeof(dw_timer_regs_t));
} else {
ret = CSI_ERROR;
}
return ret;
}
/**
\brief De-initialize TIMER Interface. stops operation and releases the software resources used by the interface
\param[in] timer handle timer handle to operate
\return None
*/
void csi_timer_uninit(csi_timer_t *timer)
{
CSI_PARAM_CHK_NORETVAL(timer);
dw_timer_regs_t *timer_base = (dw_timer_regs_t *)HANDLE_REG_BASE(timer);
memset((void *)timer_base, 0, sizeof(dw_timer_regs_t));
}
/**
\brief Start timer
\param[in] timer handle timer handle to operate
\param[in] timeout_us the timeout for timer
\return error code \ref csi_error_t
*/
csi_error_t csi_timer_start(csi_timer_t *timer, uint32_t timeout_us)
{
CSI_PARAM_CHK(timer, CSI_ERROR);
CSI_PARAM_CHK(timeout_us, CSI_ERROR);
csi_error_t ret = CSI_OK;
dw_timer_regs_t *timer_base = (dw_timer_regs_t *)HANDLE_REG_BASE(timer);
uint32_t tmp_load = timeout_us * (soc_get_timer_freq((uint32_t)timer->dev.idx) / 1000000U);
dw_timer_set_mode_load(timer_base);
dw_timer_write_load(timer_base, tmp_load);
dw_timer_set_disable(timer_base);
dw_timer_set_enable(timer_base);
dw_timer_set_unmask(timer_base);
return ret;
}
/**
\brief Stop timer
\param[in] timer handle timer handle to operate
\return None
*/
void csi_timer_stop(csi_timer_t *timer)
{
CSI_PARAM_CHK_NORETVAL(timer);
dw_timer_regs_t *timer_base;
timer_base = (dw_timer_regs_t *)HANDLE_REG_BASE(timer);
dw_timer_set_mask(timer_base);
dw_timer_set_disable(timer_base);
}
/**
\brief Get timer remaining value
\param[in] timer handle timer handle to operate
\return the remaining value
*/
uint32_t csi_timer_get_remaining_value(csi_timer_t *timer)
{
CSI_PARAM_CHK(timer, 0U);
dw_timer_regs_t *timer_base;
timer_base = (dw_timer_regs_t *)HANDLE_REG_BASE(timer);
return dw_timer_get_current(timer_base);
}
/**
\brief Get timer load value
\param[in] timer handle timer handle to operate
\return the load value
*/
uint32_t csi_timer_get_load_value(csi_timer_t *timer)
{
CSI_PARAM_CHK(timer, 0U);
dw_timer_regs_t *timer_base = (dw_timer_regs_t *)HANDLE_REG_BASE(timer);
return (dw_timer_read_load(timer_base));
}
/**
\brief Check timer is running
\param[in] timer handle timer handle to operate
\return true->running, false->stopped
*/
bool csi_timer_is_running(csi_timer_t *timer)
{
CSI_PARAM_CHK(timer, false);
dw_timer_regs_t *timer_base = (dw_timer_regs_t *)HANDLE_REG_BASE(timer);
return (dw_timer_get_enable(timer_base) ? true : false);
}
/**
\brief Attach the callback handler to timer
\param[in] timer operate handle.
\param[in] callback callback function
\param[in] arg callback's param
\return error code \ref csi_error_t
*/
csi_error_t csi_timer_attach_callback(csi_timer_t *timer, void *callback, void *arg)
{
CSI_PARAM_CHK(timer, CSI_ERROR);
timer->callback = callback;
timer->arg = arg;
csi_irq_attach((uint32_t)timer->dev.irq_num, &dw_timer_irq_handler, &timer->dev);
csi_irq_enable((uint32_t)timer->dev.irq_num);
return CSI_OK;
}
/**
\brief Detach the callback handler
\param[in] timer operate handle.
*/
void csi_timer_detach_callback(csi_timer_t *timer)
{
CSI_PARAM_CHK_NORETVAL(timer);
timer->callback = NULL;
timer->arg = NULL;
csi_irq_disable((uint32_t)timer->dev.irq_num);
csi_irq_detach((uint32_t)timer->dev.irq_num);
}
#ifdef CONFIG_PM
csi_error_t dw_timer_pm_action(csi_dev_t *dev, csi_pm_dev_action_t action)
{
CSI_PARAM_CHK(dev, CSI_ERROR);
csi_error_t ret = CSI_OK;
csi_pm_dev_t *pm_dev = &dev->pm_dev;
switch (action) {
case PM_DEV_SUSPEND:
csi_pm_dev_save_regs(pm_dev->reten_mem, (uint32_t *)dev->reg_base, 1U);
csi_pm_dev_save_regs(pm_dev->reten_mem + 1, (uint32_t *)(dev->reg_base + 8U), 1U);
break;
case PM_DEV_RESUME:
csi_pm_dev_restore_regs(pm_dev->reten_mem, (uint32_t *)dev->reg_base, 1U);
csi_pm_dev_restore_regs(pm_dev->reten_mem + 1, (uint32_t *)(dev->reg_base + 8U), 1U);
break;
default:
ret = CSI_ERROR;
break;
}
return ret;
}
csi_error_t csi_timer_enable_pm(csi_timer_t *timer)
{
return csi_pm_dev_register(&timer->dev, dw_timer_pm_action, 8U, 0U);
}
void csi_timer_disable_pm(csi_timer_t *timer)
{
csi_pm_dev_unregister(&timer->dev);
}
#endif
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