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/* Copyright 2014 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/* NPCX-specific hwtimer module for Chrome EC */
#ifndef __CROS_EC_HWTIMER_CHIP_H
#define __CROS_EC_HWTIMER_CHIP_H
/* Use ITIM32 as main hardware timer */
#define TICK_ITIM32_MAX_CNT 0xFFFFFFFF
/* Maximum deadline of event */
#define EVT_MAX_EXPIRED_US TICK_ITIM32_MAX_CNT
/* Clock source for ITIM16 */
enum ITIM_SOURCE_CLOCK_T {
ITIM_SOURCE_CLOCK_APB2 = 0,
ITIM_SOURCE_CLOCK_32K = 1,
};
/**
* Initialise a hardware timer
*
* Select the source clock for a timer and prepare it for use.
*
* @param itim_no Timer number to init (enum ITIM_MODULE_T)
* @param source Source for timer clock (enum ITIM_SOURCE_CLOCK_T)
*/
void init_hw_timer(int itim_no, enum ITIM_SOURCE_CLOCK_T source);
/* Returns the counter value of event timer */
uint16_t __hw_clock_event_count(void);
/* Returns time delay because of deep idle */
uint32_t __hw_clock_get_sleep_time(uint16_t pre_evt_cnt);
/* Handle ITIM32 overflow if interrupt is disabled */
void __hw_clock_handle_overflow(uint32_t clksrc_high);
/**
* Set up the timer for use before the task system is available
*
* @param start_t Value to assign to the counter
*/
void __hw_early_init_hwtimer(uint32_t start_t);
#endif /* __CROS_EC_HWTIMER_CHIP_H */
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