6CAR/drivers/source/rtc/sdrv_rtc_reg.c

/**
 * @file sdrv_rtc_reg.c
 * @brief semidrive sec_rtc driver
 *
 * @copyright Copyright (c) 2022  Semidrive Semiconductor.
 *            All rights reserved.
 */
#include <types.h>
#include <part.h>
#include <sdrv_ckgen.h>

#include "sdrv_rtc_reg.h"
#include "reg.h"
#include "bits.h"
#include "udelay/udelay.h"

#if CONFIG_RTC_SS_DYNAMIC_PCLK
#define RTC_SS_ACCESS_DELAY_CYCLE(n) udelay(35 * n)
#else
#define RTC_SS_ACCESS_DELAY_CYCLE(n)
#endif

uint64_t sec_rtc_get_tick(Rtc *rtc)
{
    RTC_SS_ACCESS_START();
    RTC_SS_ACCESS_DELAY_CYCLE(1);
    uint64_t tick = rtc->RTC_L;

    tick = (uint64_t)(rtc->RTC_H_HOLD_SHADOW) << 32;
    tick |= rtc->RTC_L_HOLD_SHADOW;
    RTC_SS_ACCESS_END();

    return tick;
}

void sec_rtc_set_tick(Rtc *rtc, uint64_t v)
{
    RTC_SS_ACCESS_START();
    uint32_t tick = v & 0xffffffff;
    rtc->RTC_L = tick;
    rtc->RTC_H = (v >> 32) & 0xffff;
    RTC_SS_ACCESS_END();
}

void sec_rtc_lock(Rtc *rtc)
{
    RTC_SS_ACCESS_START();
    rtc->SEC_RTC_CTRL |= BM_SEC_RTC_CTRL_LOCK;
    RTC_SS_ACCESS_END();
}

bool sec_rtc_is_locked(Rtc *rtc)
{
    bool locked = false;

    if (rtc->SEC_RTC_CTRL & BM_SEC_RTC_CTRL_LOCK)
        locked = true;

    return locked;
}

int sec_rtc_local_enable(Rtc *rtc, bool en)
{
    RTC_SS_ACCESS_START();
    if (!sec_rtc_is_locked(rtc)) {
        if (en)
            rtc->SEC_RTC_CTRL |= BM_SEC_RTC_CTRL_RTC_LOCAL_ENABLE;
        else
            rtc->SEC_RTC_CTRL &= ~BM_SEC_RTC_CTRL_RTC_LOCAL_ENABLE;

        RTC_SS_ACCESS_END();
        return 0;
    }

    RTC_SS_ACCESS_END();
    return -1;
}

void sec_rtc_set_alarm_tick(Rtc *rtc, uint64_t val)
{
    RTC_SS_ACCESS_START();
    rtc->TIMER_L = (uint32_t)(val & 0xffffffff);
    rtc->TIMER_H = (val >> 32) & 0xffff;
    RTC_SS_ACCESS_END();
}

uint64_t sec_rtc_get_alarm_tick(Rtc *rtc)
{
    RTC_SS_ACCESS_START();
    uint64_t tick = (uint64_t)(rtc->TIMER_H) << 32;
    tick |= rtc->TIMER_L;
    RTC_SS_ACCESS_END();

    return tick;
}

uint8_t sec_rtc_is_alarm_enable(Rtc *rtc)
{
    RTC_SS_ACCESS_START();
    uint32_t val = rtc->WAKEUP_CTRL;
    RTC_SS_ACCESS_END();

    return (val & (BM_WAKEUP_CTRL_ENABLE | BM_WAKEUP_CTRL_IRQ_ENABLE |
                   BM_WAKEUP_CTRL_REQ_ENABLE));
}

bool sec_rtc_get_wakeup_status(Rtc *rtc)
{
    RTC_SS_ACCESS_START();
    if (rtc->WAKEUP_CTRL & BM_WAKEUP_CTRL_STATUS) {
        RTC_SS_ACCESS_END();
        return true;
    }

    RTC_SS_ACCESS_END();
    return false;
}

void sec_rtc_clear_wakeup_status(Rtc *rtc)
{
    RTC_SS_ACCESS_START();
    rtc->WAKEUP_CTRL |= BM_WAKEUP_CTRL_CLEAR;
    RTC_SS_ACCESS_END();
    sec_rtc_set_cross_clk_en(rtc);

    RTC_SS_ACCESS_START();
    rtc->WAKEUP_CTRL &= ~BM_WAKEUP_CTRL_CLEAR;
    RTC_SS_ACCESS_END();
    sec_rtc_set_cross_clk_en(rtc);
}

bool sec_rtc_get_overflow_status(Rtc *rtc)
{
    RTC_SS_ACCESS_START();
    if (rtc->WAKEUP_CTRL & BM_WAKEUP_CTRL_STATUS) {
        RTC_SS_ACCESS_END();
        return true;
    }
    RTC_SS_ACCESS_END();

    return false;
}

void sec_rtc_clear_violation_status(Rtc *rtc, uint8_t vio)
{
    RTC_SS_ACCESS_START();
    rtc->VIOLATION_INT = (rtc->VIOLATION_INT & ~BM_VIOLATION_INT_DISABLE_STATUS) |
                         (vio << BM_VIOLATION_INT_OVERFLOW_STATS_BIT);

    rtc->WAKEUP_CTRL |= (vio << BM_WAKEUP_CTRL_OVERFLOW_CLEAR_BIT);
    udelay(150);

    rtc->WAKEUP_CTRL &= ~(vio << BM_WAKEUP_CTRL_OVERFLOW_CLEAR_BIT);
    udelay(150);
    RTC_SS_ACCESS_END();
}

uint64_t sec_rtc_get_hld_tick(Rtc *rtc, uint64_t *tick)
{
    if (tick)
        *tick = sec_rtc_get_tick(rtc);

    RTC_SS_ACCESS_START();
    uint64_t tick_hld = (uint64_t)(rtc->RTC_H_HOLD_SHADOW) << 32;
    tick_hld |= rtc->RTC_L_HOLD_SHADOW;
    RTC_SS_ACCESS_END();

    return tick_hld;
}

void sec_rtc_set_rtc_ctrl(Rtc *rtc, uint32_t ctrl)
{
    RTC_SS_ACCESS_START();
    rtc->SEC_RTC_CTRL = ctrl;
    RTC_SS_ACCESS_END();
}

void sec_rtc_set_cross_clk_en(Rtc *rtc)
{
    uint32_t cnt = 0;
    RTC_SS_ACCESS_START();
    rtc->RTC_REGISTER_CROSS_CLOCK |=
        BM_RTC_REGISTER_CROSS_CLOCK_REGISTER_CROSS_CLOCK_EN;

    udelay(120);

    while ((rtc->RTC_REGISTER_CROSS_CLOCK &
            BM_RTC_REGISTER_CROSS_CLOCK_REGISTER_CROSS_CLOCK_EN)
            && (cnt < 120)) {
        udelay(1);
        cnt ++;
    };
    RTC_SS_ACCESS_END();
    udelay(120);
}

void sec_rtc_wakeup_enable(Rtc *rtc, uint8_t vtype, uint8_t en)
{
    RTC_SS_ACCESS_START();
    uint32_t v = rtc->WAKEUP_CTRL;

    if (en)
        v |= vtype;
    else
        v &= ~vtype;

    rtc->WAKEUP_CTRL = v;
    RTC_SS_ACCESS_END();

    sec_rtc_set_cross_clk_en(rtc);
}

void sec_rtc_ms_cfg(Rtc *master, Rtc *slave, uint8_t ctmode1, uint8_t ctmode2)
{
    RTC_SS_ACCESS_START();
    master->RTC_WORKING_MODE = BM_RTC_WORKING_MODE_RTC_MASTER_SLAVE;

    if (ctmode1)
        master->RTC_WORKING_MODE |= BM_RTC_WORKING_MODE_RTC_COUNT_MODE;

    slave->RTC_WORKING_MODE &= ~BM_RTC_WORKING_MODE_RTC_MASTER_SLAVE;

    if (ctmode2)
        slave->RTC_WORKING_MODE |= BM_RTC_WORKING_MODE_RTC_COUNT_MODE;
    RTC_SS_ACCESS_END();
}

void sec_rtc_set_violation_enable(Rtc *rtc, uint8_t mask)
{
    if (rtc) {
        /* do not clear BM_VIOLATION_INT_DISABLE_STATUS */
        RTC_SS_ACCESS_START();
        rtc->VIOLATION_INT = (rtc->VIOLATION_INT & ~BM_VIOLATION_INT_DISABLE_STATUS) |
                             FV_VIOLATION_INT_MASK(mask);
        RTC_SS_ACCESS_END();
    }
}

void sec_rtc_set_violation_disable(Rtc *rtc, uint8_t mask)
{
    if (rtc) {
        RTC_SS_ACCESS_START();
        /* do not clear BM_VIOLATION_INT_DISABLE_STATUS */
        rtc->VIOLATION_INT &= (~FV_VIOLATION_INT_MASK(mask) &
                               ~BM_VIOLATION_INT_DISABLE_STATUS);
        RTC_SS_ACCESS_END();
    }
}

uint8_t sec_rtc_get_violation_status(Rtc *rtc)
{
    RTC_SS_ACCESS_START();
    uint32_t val = rtc->VIOLATION_INT;
    RTC_SS_ACCESS_END();

    return ((val & (BM_VIOLATION_INT_OVERFLOW_STATS |
                    BM_VIOLATION_INT_DISABLE_STATUS))
            >> BM_VIOLATION_INT_OVERFLOW_STATS_BIT);
}

uint32_t sec_rtc_read_general_purpose_reg(Rtc *rtc, uint8_t gp_num)
{
    uint32_t ret = 0;

    RTC_SS_ACCESS_START();
    switch (gp_num) {
        case 0:
            ret = rtc->GP0;
            break;

        case 1:
            ret = rtc->GP1;
            break;

        case 2:
            ret = rtc->GP2;
            break;

        case 3:
            ret = rtc->GP3;
            break;

        default:
            ret = rtc->GP0;
            break;
    }
    RTC_SS_ACCESS_END();

    return ret;
}

void sec_rtc_write_general_purpose_reg(Rtc *rtc, uint8_t gp_num, uint32_t value)
{
    RTC_SS_ACCESS_START();
    switch (gp_num) {
        case 0:
            rtc->GP0 = value;
            break;

        case 1:
            rtc->GP1 = value;
            break;

        case 2:
            rtc->GP2 = value;
            break;

        case 3:
            rtc->GP3 = value;
            break;

        default:
            rtc->GP0 = value;
            break;
    }
    RTC_SS_ACCESS_END();
}