104 lines
2.6 KiB
C
104 lines
2.6 KiB
C
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/* Copyright 2016 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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/* Clocks and power management settings */
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#ifndef __CROS_EC_CLOCK_F_H
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#define __CROS_EC_CLOCK_F_H
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#include "chipset.h"
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#include "clock.h"
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#include "common.h"
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#include "console.h"
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#include "cpu.h"
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#include "hooks.h"
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#include "hwtimer.h"
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#include "registers.h"
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#include "system.h"
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#include "task.h"
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#include "timer.h"
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#include "util.h"
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/* Lock and unlock RTC write access */
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static inline void rtc_lock_regs(void)
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{
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STM32_RTC_WPR = 0xff;
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}
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static inline void rtc_unlock_regs(void)
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{
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STM32_RTC_WPR = 0xca;
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STM32_RTC_WPR = 0x53;
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}
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struct rtc_time_reg {
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uint32_t rtc_ssr; /* subseconds */
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uint32_t rtc_tr; /* hours, minutes, seconds */
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uint32_t rtc_dr; /* years, months, dates, week days */
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};
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/* Save the RTC alarm wake time */
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struct wake_time {
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timestamp_t ts;
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uint32_t rtc_alrmar; /* the value of register STM32_RTC_ALRMAR */
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};
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/* Convert between RTC regs in BCD and seconds */
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uint32_t rtc_to_sec(const struct rtc_time_reg *rtc);
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/* Convert between seconds and RTC regs */
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void sec_to_rtc(uint32_t sec, struct rtc_time_reg *rtc);
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/* Calculate microseconds from rtc sub-second register. */
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int32_t rtcss_to_us(uint32_t rtcss);
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/* Calculate rtc sub-second register value from microseconds. */
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uint32_t us_to_rtcss(int32_t us);
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/* Return sub-10-sec time diff between two rtc readings */
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uint32_t get_rtc_diff(const struct rtc_time_reg *rtc0,
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const struct rtc_time_reg *rtc1);
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/* Read RTC values */
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void rtc_read(struct rtc_time_reg *rtc);
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/* Set RTC value */
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void rtc_set(uint32_t sec);
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/* Set RTC wakeup, save alarm wakeup time when save_alarm != 0 */
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void set_rtc_alarm(uint32_t delay_s, uint32_t delay_us,
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struct rtc_time_reg *rtc, uint8_t save_alarm);
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/* Clear RTC wakeup */
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void reset_rtc_alarm(struct rtc_time_reg *rtc);
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/*
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* Return the remaining seconds before the RTC alarm goes off.
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* Sub-seconds are ignored. Returns 0 if alarm is not set.
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*/
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uint32_t get_rtc_alarm(void);
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/* RTC init */
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void rtc_init(void);
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/* Init clock blocks and functionality */
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void clock_init(void);
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/* Init high speed clock config */
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void config_hispeed_clock(void);
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/* Get timer clock frequency (for STM32 only) */
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int clock_get_timer_freq(void);
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/*
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* Return 1 if host_wake_time is nonzero and the saved host_wake_time
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* is expired at a given time, ts.
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*/
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int is_host_wake_alarm_expired(timestamp_t ts);
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/* Set RTC wakeup based on the value saved in host_wake_time */
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void restore_host_wake_alarm(void);
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#endif /* __CROS_EC_CLOCK_F_H */
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