/**************************************************************************//**
 * @file     sc.c
 * @version  V1.00
 * $Revision: 4 $
 * $Date: 15/07/27 6:40p $
 * @brief    Nano100 series Smartcard(SC) driver source file
 *
 * @note
 * SPDX-License-Identifier: Apache-2.0
 * Copyright (C) 2013-2015 Nuvoton Technology Corp. All rights reserved.
*****************************************************************************/
#include "Nano100Series.h"

// Below are variables used locally by SC driver and does not want to parse by doxygen unless HIDDEN_SYMBOLS is defined
/// @cond HIDDEN_SYMBOLS
static uint32_t u32CardStateIgnore[SC_INTERFACE_NUM] = {0, 0};
uint32_t u32CardPwrPolarity[SC_INTERFACE_NUM] = {0, 0}; // cannot be static. used by SC_SET_VCC_PIN defined in sc.h
/// @endcond /* HIDDEN_SYMBOLS */

/** @addtogroup NANO100_Device_Driver NANO100 Device Driver
  @{
*/

/** @addtogroup NANO100_SC_Driver SC Driver
  @{
*/


/** @addtogroup NANO100_SC_EXPORTED_FUNCTIONS SC Exported Functions
  @{
*/

/**
  * @brief This function indicates specified smartcard slot status
  * @param[in] sc Base address of smartcard module
  * @return Card insert status
  * @retval TRUE Card insert
  * @retval FALSE Card remove
  */
uint32_t SC_IsCardInserted(SC_T *sc)
{
    // put conditions into two variable to remove IAR compilation warning
    uint32_t cond1 = ((sc->PINCSR & SC_PINCSR_CD_PIN_ST_Msk) >> SC_PINCSR_CD_PIN_ST_Pos);
    uint32_t cond2 = ((sc->PINCSR & SC_PINCSR_CD_LEV_Msk) >> SC_PINCSR_CD_LEV_Pos);

    if(sc == SC0 && u32CardStateIgnore[0] == 1)
        return TRUE;
    else if(sc == SC1 && u32CardStateIgnore[1] == 1)
        return TRUE;
    else if(cond1 != cond2)
        return FALSE;
    else
        return TRUE;
}

/**
  * @brief This function reset both transmit and receive FIFO of specified smartcard module
  * @param[in] sc Base address of smartcard module
  * @return None
  */
void SC_ClearFIFO(SC_T *sc)
{
    sc->ALTCTL |= (SC_ALTCTL_TX_RST_Msk | SC_ALTCTL_RX_RST_Msk);
}

/**
  * @brief This function disable specified smartcard module
  * @param[in] sc Base address of smartcard module
  * @return None
  */
void SC_Close(SC_T *sc)
{
    sc->IER = 0;
    sc->PINCSR = 0;
    sc->ALTCTL = 0;
    sc->CTL = 0;
}

/**
  * @brief This function initialized smartcard module
  * @param[in] sc Base address of smartcard module
  * @param[in] u32CD Card detect polarity, select the CD pin state which indicates card is absent. Could be
  *                 - \ref SC_PIN_STATE_HIGH
  *                 - \ref SC_PIN_STATE_LOW
  *                 - \ref SC_PIN_STATE_IGNORE, no card detect pin, always assumes card present
  * @param[in] u32PWR Power on polarity, select the PWR pin state which could set smartcard VCC to high level. Could be
  *                 - \ref SC_PIN_STATE_HIGH
  *                 - \ref SC_PIN_STATE_LOW
  * @return None
  */
void SC_Open(SC_T *sc, uint32_t u32CD, uint32_t u32PWR)
{
    uint32_t u32Reg = 0, u32Intf;

    if(sc == SC0)
        u32Intf = 0;
    else
        u32Intf = 1;

    if(u32CD != SC_PIN_STATE_IGNORE)
    {
        u32Reg = u32CD ? 0: SC_PINCSR_CD_LEV_Msk;
        u32CardStateIgnore[u32Intf] = 0;
    }
    else
    {
        u32CardStateIgnore[u32Intf] = 1;
    }
    // Nano100AN does not have power inverse control bit
    if(u32PWR == SC_PIN_STATE_LOW)
    {
        u32Reg |= SC_PINCSR_POW_EN_Msk;
        u32CardPwrPolarity[u32Intf] = 0;
    }
    else
    {
        u32CardPwrPolarity[u32Intf] = 1;
    }
    sc->PINCSR = u32Reg;
    sc->CTL = SC_CTL_SC_CEN_Msk;
}

/**
  * @brief This function reset specified smartcard module to its default state for activate smartcard
  * @param[in] sc Base address of smartcard module
  * @return None
  */
void SC_ResetReader(SC_T *sc)
{
    uint32_t u32Intf;

    if(sc == SC0)
        u32Intf = 0;
    else
        u32Intf = 1;

    // Reset FIFO
    sc->ALTCTL |= (SC_ALTCTL_TX_RST_Msk | SC_ALTCTL_RX_RST_Msk);
    // Set Rx trigger level to 1 character, longest card detect debounce period, disable error retry (EMV ATR does not use error retry)
    sc->CTL &= ~(SC_CTL_RX_FTRI_LEV_Msk |
                 SC_CTL_CD_DEB_SEL_Msk |
                 SC_CTL_TX_ERETRY_Msk |
                 SC_CTL_TX_ERETRY_EN_Msk |
                 SC_CTL_RX_ERETRY_Msk |
                 SC_CTL_RX_ERETRY_EN_Msk);
    // Enable auto convention, and all three smartcard internal timers
    sc->CTL |= SC_CTL_AUTO_CON_EN_Msk | SC_CTL_TMR_SEL_Msk;
    // Disable Rx timeout
    sc->RFTMR = 0;
    // 372 clocks per ETU by default
    sc->ETUCR = 371;
    // Enable auto de-activation while card removal
    sc->PINCSR |= SC_PINCSR_ADAC_CD_EN_Msk;

    /* Enable necessary interrupt for smartcard operation */
    if(u32CardStateIgnore[u32Intf]) // Do not enable card detect interrupt if card present state ignore
        sc->IER = (SC_IER_RDA_IE_Msk |
                   SC_IER_TERR_IE_Msk |
                   SC_IER_TMR0_IE_Msk |
                   SC_IER_TMR1_IE_Msk |
                   SC_IER_TMR2_IE_Msk |
                   SC_IER_BGT_IE_Msk |
                   SC_IER_ACON_ERR_IE_Msk);
    else
        sc->IER = (SC_IER_RDA_IE_Msk |
                   SC_IER_TERR_IE_Msk |
                   SC_IER_TMR0_IE_Msk |
                   SC_IER_TMR1_IE_Msk |
                   SC_IER_TMR2_IE_Msk |
                   SC_IER_BGT_IE_Msk |
                   SC_IER_CD_IE_Msk |
                   SC_IER_ACON_ERR_IE_Msk);

    return;
}

/**
  * @brief This function block guard time (BGT) of specified smartcard module
  * @param[in] sc Base address of smartcard module
  * @param[in] u32BGT Block guard time using ETU as unit, valid range are between 1 ~ 32
  * @return None
  */
void SC_SetBlockGuardTime(SC_T *sc, uint32_t u32BGT)
{
    sc->CTL = (sc->CTL & ~SC_CTL_BGT_Msk) | ((u32BGT - 1) << SC_CTL_BGT_Pos);
}

/**
  * @brief This function character guard time (CGT) of specified smartcard module
  * @param[in] sc Base address of smartcard module
  * @param[in] u32CGT Character guard time using ETU as unit, valid range are between 11 ~ 267
  * @return None
  */
void SC_SetCharGuardTime(SC_T *sc, uint32_t u32CGT)
{
    u32CGT -= sc->CTL & SC_CTL_SLEN_Msk ? 11: 12;
    sc->EGTR = u32CGT;
}

/**
  * @brief This function stop all smartcard timer of specified smartcard module
  * @param[in] sc Base address of smartcard module
  * @return None
  * @note This function stop the timers within smartcard module, \b not timer module
  */
void SC_StopAllTimer(SC_T *sc)
{
    sc->ALTCTL &= ~(SC_ALTCTL_TMR0_SEN_Msk | SC_ALTCTL_TMR1_SEN_Msk | SC_ALTCTL_TMR2_SEN_Msk);
}

/**
  * @brief This function configure and start a smartcard timer of specified smartcard module
  * @param[in] sc Base address of smartcard module
  * @param[in] u32TimerNum Timer(s) to start. Valid values are 0, 1.
  * @param[in] u32Mode Timer operating mode, valid values are:
  *             - \ref SC_TMR_MODE_0
  *             - \ref SC_TMR_MODE_1
  *             - \ref SC_TMR_MODE_2
  *             - \ref SC_TMR_MODE_3
  *             - \ref SC_TMR_MODE_4
  *             - \ref SC_TMR_MODE_5
  *             - \ref SC_TMR_MODE_6
  *             - \ref SC_TMR_MODE_7
  *             - \ref SC_TMR_MODE_8
  * @param[in] u32ETUCount Timer timeout duration, ETU based. For timer 0, valid  range are between 1~0x1000000ETUs.
  *                        For timer 1 and timer 2, valid range are between 1 ~ 0x100 ETUs
  * @return None
  * @note This function start the timer within smartcard module, \b not timer module
  * @note Depend on the timer operating mode, timer may not start counting immediately
  */
void SC_StartTimer(SC_T *sc, uint32_t u32TimerNum, uint32_t u32Mode, uint32_t u32ETUCount)
{
    uint32_t reg = u32Mode | (SC_TMR0_CNT_Msk & (u32ETUCount - 1));

    if(u32TimerNum == 0)
    {
        sc->TMR0 = reg;
        sc->ALTCTL |= SC_ALTCTL_TMR0_SEN_Msk;
    }
    else if(u32TimerNum == 1)
    {
        sc->TMR1 = reg;
        sc->ALTCTL |= SC_ALTCTL_TMR1_SEN_Msk;
    }
    else       // timer 2
    {
        sc->TMR2 = reg;
        sc->ALTCTL |= SC_ALTCTL_TMR2_SEN_Msk;
    }
}

/**
  * @brief This function stop a smartcard timer of specified smartcard module
  * @param[in] sc Base address of smartcard module
  * @param[in] u32TimerNum Timer(s) to stop. Valid values are 0, 1.
  * @return None
  * @note This function stop the timer within smartcard module, \b not timer module
  */
void SC_StopTimer(SC_T *sc, uint32_t u32TimerNum)
{
    if(u32TimerNum == 0)
        sc->ALTCTL &= ~SC_ALTCTL_TMR0_SEN_Msk;
    else if(u32TimerNum == 1)
        sc->ALTCTL &= ~SC_ALTCTL_TMR1_SEN_Msk;
    else    // timer 2
        sc->ALTCTL &= ~SC_ALTCTL_TMR2_SEN_Msk;
}



/*@}*/ /* end of group NANO100_SC_EXPORTED_FUNCTIONS */

/*@}*/ /* end of group NANO100_SC_Driver */

/*@}*/ /* end of group NANO100_Device_Driver */

/*** (C) COPYRIGHT 2013-2015 Nuvoton Technology Corp. ***/
