#include "shared-bindings/microcontroller/Pin.h"

#include "samd21_pins.h"

#define SERCOM(p_sercom, p_pad) \
{ \
  .sercom = p_sercom, \
  .pad = p_pad \
}

#define NO_SERCOM SERCOM(0, 0)

#define TCC(p_tcc, p_channel, p_wave_output) \
{ \
  .tcc = p_tcc, \
  .is_tc = false, \
  .channel = p_channel, \
  .wave_output = p_wave_output \
}

#define TC(p_tc, p_channel, p_wave_output) \
{ \
  .tc = p_tc, \
  .is_tc = true, \
  .channel = p_channel, \
  .wave_output = p_wave_output \
}

#define NO_TIMER TCC(0, 0, 0)

#define TOUCH(y_line) \
    .has_touch = true, \
    .touch_y_line = y_line,

#define NO_TOUCH \
    .has_touch = false,

#define EXTINT_CHANNEL(channel) \
    .has_extint = true, \
    .extint_channel = channel,

#define NO_EXTINT \
    .has_extint = false,

#define ADC_INPUT(input) \
    .has_adc = true, \
    .adc_input = input,

#define NO_ADC \
    .has_adc = false,

// This macro is used to simplify pin definition in boards/<board>/pins.c
#define PIN(p_name, p_adc, p_extint, p_touch, p_primary_timer,  \
            p_secondary_timer, p_primary_sercom, p_secondary_sercom) \
const mcu_pin_obj_t pin_## p_name = { \
    { &mcu_pin_type }, \
    .name = MP_QSTR_ ## p_name, \
    .pin = (PIN_## p_name), \
    p_extint \
    p_adc \
    p_touch \
    .primary_timer = p_primary_timer, \
    .secondary_timer =  p_secondary_timer, \
    .sercom = {p_primary_sercom, p_secondary_sercom}, \
}

#define NO_ADC_INPUT (0)

// Pins in datasheet order.
// NOTE(tannewt): TC wave out 0 is commented out because the first channel is
// used to vary the 16 bit timer's frequency.
#ifdef PIN_PA00
PIN(PA00, EXTINT_CHANNEL(0), NO_ADC, NO_TOUCH,
    TCC(TCC2, 0, 0),
    NO_TIMER,
    NO_SERCOM,
    SERCOM(SERCOM1, 0));
#endif
#ifdef PIN_PA01
PIN(PA01, EXTINT_CHANNEL(1), NO_ADC, NO_TOUCH,
    TCC(TCC2, 1, 1),
    NO_TIMER,
    NO_SERCOM,
    SERCOM(SERCOM1, 1));
#endif
#ifdef PIN_PA02
// Touch is not allowed on A0 (PA02) on Circuit Playground Express.
PIN(PA02, EXTINT_CHANNEL(2), ADC_INPUT(ADC_POSITIVE_INPUT_PIN0),
    #ifdef PA02_NO_TOUCH
      NO_TOUCH,
    #else
      TOUCH(0),
    #endif
    NO_TIMER,
    NO_TIMER,
    NO_SERCOM,
    NO_SERCOM);
#endif
#ifdef PIN_PA03
PIN(PA03, EXTINT_CHANNEL(3), ADC_INPUT(ADC_POSITIVE_INPUT_PIN1), TOUCH(1),
    NO_TIMER,
    NO_TIMER,
    NO_SERCOM,
    NO_SERCOM);
#endif
#ifdef PIN_PB04
PIN(PB04, EXTINT_CHANNEL(4), ADC_INPUT(ADC_POSITIVE_INPUT_PIN12), TOUCH(10),
    NO_TIMER,
    NO_TIMER,
    NO_SERCOM,
    NO_SERCOM);
#endif
#ifdef PIN_PB05
PIN(PB05, EXTINT_CHANNEL(5), ADC_INPUT(ADC_POSITIVE_INPUT_PIN13), TOUCH(11),
    NO_TIMER,
    NO_TIMER,
    NO_SERCOM,
    NO_SERCOM);
#endif
#ifdef PIN_PB06
PIN(PB06, EXTINT_CHANNEL(6), ADC_INPUT(ADC_POSITIVE_INPUT_PIN14), TOUCH(12),
    NO_TIMER,
    NO_TIMER,
    NO_SERCOM,
    NO_SERCOM);
#endif
#ifdef PIN_PB07
PIN(PB07, EXTINT_CHANNEL(7), ADC_INPUT(ADC_POSITIVE_INPUT_PIN15), TOUCH(13),
    NO_TIMER,
    NO_TIMER,
    NO_SERCOM,
    NO_SERCOM);
#endif
#ifdef PIN_PB08
PIN(PB08, EXTINT_CHANNEL(8), ADC_INPUT(ADC_POSITIVE_INPUT_PIN2), TOUCH(14),
    NO_TIMER, // TC(TC4, 0, 0),
    NO_TIMER,
    NO_SERCOM,
    SERCOM(SERCOM4, 0));
#endif
#ifdef PIN_PB09
PIN(PB09, EXTINT_CHANNEL(9), ADC_INPUT(ADC_POSITIVE_INPUT_PIN3), TOUCH(15),
    TC(TC4, 1, 1),
    NO_TIMER,
    NO_SERCOM,
    SERCOM(SERCOM4, 1));
#endif
#ifdef PIN_PA04
PIN(PA04, EXTINT_CHANNEL(4), ADC_INPUT(ADC_POSITIVE_INPUT_PIN4), TOUCH(2),
    TCC(TCC0, 0, 0),
    NO_TIMER,
    NO_SERCOM,
    SERCOM(SERCOM0, 0));
#endif
#ifdef PIN_PA05
PIN(PA05, EXTINT_CHANNEL(5), ADC_INPUT(ADC_POSITIVE_INPUT_PIN5), TOUCH(3),
    TCC(TCC0, 1, 1),
    NO_TIMER,
    NO_SERCOM,
    SERCOM(SERCOM0, 1));
#endif
#ifdef PIN_PA06
PIN(PA06, EXTINT_CHANNEL(6), ADC_INPUT(ADC_POSITIVE_INPUT_PIN6), TOUCH(4),
    TCC(TCC1, 0, 0),
    NO_TIMER,
    NO_SERCOM,
    SERCOM(SERCOM0, 2));
#endif
#ifdef PIN_PA07
PIN(PA07, EXTINT_CHANNEL(7), ADC_INPUT(ADC_POSITIVE_INPUT_PIN7), TOUCH(5),
    TCC(TCC1, 1, 1),
    NO_TIMER,
    NO_SERCOM,
    SERCOM(SERCOM0, 3));
#endif
#ifdef PIN_PA08
PIN(PA08, NO_EXTINT, ADC_INPUT(ADC_POSITIVE_INPUT_PIN16), NO_TOUCH,
    TCC(TCC0, 0, 0),
    TCC(TCC1, 0, 2),
    SERCOM(SERCOM0, 0),
    SERCOM(SERCOM2, 0));
#endif
#ifdef PIN_PA09
PIN(PA09, EXTINT_CHANNEL(9), ADC_INPUT(ADC_POSITIVE_INPUT_PIN17), NO_TOUCH,
    TCC(TCC0, 1, 1),
    TCC(TCC1, 1, 3),
    SERCOM(SERCOM0, 1),
    SERCOM(SERCOM2, 1));
#endif
#ifdef PIN_PA10
PIN(PA10, EXTINT_CHANNEL(10), ADC_INPUT(ADC_POSITIVE_INPUT_PIN18), NO_TOUCH,
    TCC(TCC1, 0, 0),
    TCC(TCC0, 2, 2),
    SERCOM(SERCOM0, 2),
    SERCOM(SERCOM2, 2));
#endif
#ifdef PIN_PA11
PIN(PA11, EXTINT_CHANNEL(11), ADC_INPUT(ADC_POSITIVE_INPUT_PIN19), NO_TOUCH,
    TCC(TCC1, 1, 1),
    TCC(TCC0, 3, 3),
    SERCOM(SERCOM0, 3),
    SERCOM(SERCOM2, 3));
#endif
#ifdef PIN_PB10
PIN(PB10, EXTINT_CHANNEL(10), NO_ADC, NO_TOUCH,
    NO_TIMER, // TC(TC5, 0, 0),
    TCC(TCC0, 0, 4),
    NO_SERCOM,
    SERCOM(SERCOM4, 2));
#endif
#ifdef PIN_PB11
PIN(PB11, EXTINT_CHANNEL(11), NO_ADC, NO_TOUCH,
    TC(TC5, 1, 1),
    TCC(TCC0, 1, 5),
    NO_SERCOM,
    SERCOM(SERCOM4, 3));
#endif
#ifdef PIN_PB12
PIN(PB12, EXTINT_CHANNEL(12), NO_ADC, NO_TOUCH,
    NO_TIMER, // TC(TC4, 0, 0),
    TCC(TCC0, 2, 6),
    SERCOM(SERCOM4, 0),
    NO_SERCOM);
#endif
#ifdef PIN_PB13
PIN(PB13, EXTINT_CHANNEL(13), NO_ADC, NO_TOUCH,
    TC(TC4, 1, 1),
    TCC(TCC0, 3, 7),
    SERCOM(SERCOM4, 1),
    NO_SERCOM);
#endif
#ifdef PIN_PB14
PIN(PB14, EXTINT_CHANNEL(14), NO_ADC, NO_TOUCH,
    NO_TIMER, // TC(TC5, 0, 0),
    NO_TIMER,
    SERCOM(SERCOM4, 2),
    NO_SERCOM);
#endif

// Second page.
#ifdef PIN_PB15
PIN(PB15, EXTINT_CHANNEL(15), NO_ADC, NO_TOUCH,
    TC(TC5, 1, 1),
    NO_TIMER,
    SERCOM(SERCOM4, 3),
    NO_SERCOM);
#endif
#ifdef PIN_PA12
PIN(PA12, EXTINT_CHANNEL(12), NO_ADC, NO_TOUCH,
    TCC(TCC2, 0, 0),
    TCC(TCC0, 2, 6),
    SERCOM(SERCOM2, 0),
    SERCOM(SERCOM4, 0));
#endif
#ifdef PIN_PA13
PIN(PA13, EXTINT_CHANNEL(13), NO_ADC, NO_TOUCH,
    TCC(TCC2, 1, 1),
    TCC(TCC0, 3, 7),
    SERCOM(SERCOM2, 1),
    SERCOM(SERCOM4, 1));
#endif
#ifdef PIN_PA14
PIN(PA14, EXTINT_CHANNEL(14), NO_ADC, NO_TOUCH,
    NO_TIMER, // TC(TC3, 0, 0),
    TCC(TCC0, 0, 4),
    SERCOM(SERCOM2, 2),
    #ifdef SERCOM4
    SERCOM(SERCOM4, 2)
    #else
    NO_SERCOM
    #endif
    );
#endif
#ifdef PIN_PA15
PIN(PA15, EXTINT_CHANNEL(15), NO_ADC, NO_TOUCH,
    TC(TC3, 1, 1),
    TCC(TCC0, 1, 5),
    SERCOM(SERCOM2, 3),
    #ifdef SERCOM4
    SERCOM(SERCOM4, 3)
    #else
    NO_SERCOM
    #endif
    );
#endif
#ifdef PIN_PA16
PIN(PA16, EXTINT_CHANNEL(0), NO_ADC, NO_TOUCH,
    TCC(TCC2, 0, 0),
    TCC(TCC0, 2, 6),
    SERCOM(SERCOM1, 0),
    SERCOM(SERCOM3, 0));
#endif
#ifdef PIN_PA17
PIN(PA17, EXTINT_CHANNEL(1), NO_ADC, NO_TOUCH,
    TCC(TCC2, 1, 1),
    TCC(TCC0, 3, 7),
    SERCOM(SERCOM1, 1),
    SERCOM(SERCOM3, 1));
#endif
#ifdef PIN_PA18
PIN(PA18, EXTINT_CHANNEL(2), NO_ADC, NO_TOUCH,
    NO_TIMER, // TC(TC3, 0, 0),
    TCC(TCC0, 2, 2),
    SERCOM(SERCOM1, 2),
    SERCOM(SERCOM3, 2));
#endif
#ifdef PIN_PA19
PIN(PA19, EXTINT_CHANNEL(3), NO_ADC, NO_TOUCH,
    TC(TC3, 1, 1),
    TCC(TCC0, 3, 3),
    SERCOM(SERCOM1, 3),
    SERCOM(SERCOM3, 3));
#endif
#ifdef PIN_PB16
PIN(PB16, EXTINT_CHANNEL(0), NO_ADC, NO_TOUCH,
    #ifdef _SAMD21_TC6_INSTANCE_
    NO_TIMER, // TC(TC6, 0, 0),
    #else
    NO_TIMER,
    #endif
    TCC(TCC0, 0, 4),
    SERCOM(SERCOM5, 0),
    NO_SERCOM);
#endif
#ifdef PIN_PB17
PIN(PB17, EXTINT_CHANNEL(1), NO_ADC, NO_TOUCH,
    #ifdef _SAMD21_TC6_INSTANCE_
    TC(TC6, 1, 1),
    #else
    NO_TIMER,
    #endif
    TCC(TCC0, 1, 5),
    SERCOM(SERCOM5, 1),
    NO_SERCOM);
#endif
#ifdef PIN_PA20
PIN(PA20, EXTINT_CHANNEL(4), NO_ADC, NO_TOUCH,
    #ifdef _SAMD21_TC7_INSTANCE_
    NO_TIMER, // TC(TC7, 0, 0),
    #else
    NO_TIMER,
    #endif
    TCC(TCC0, 2, 6),
    SERCOM(SERCOM5, 2),
    SERCOM(SERCOM3, 2));
#endif
#ifdef PIN_PA21
PIN(PA21, EXTINT_CHANNEL(5), NO_ADC, NO_TOUCH,
    #ifdef _SAMD21_TC7_INSTANCE_
    TC(TC7, 1, 1),
    #else
    NO_TIMER,
    #endif
    TCC(TCC0, 3, 7),
    SERCOM(SERCOM5, 3),
    SERCOM(SERCOM3, 3));
#endif
#ifdef PIN_PA22
PIN(PA22, EXTINT_CHANNEL(6), NO_ADC, NO_TOUCH,
    NO_TIMER, // TC(TC4, 0, 0),
    TCC(TCC0, 0, 4),
    SERCOM(SERCOM3, 0),
    #ifdef SERCOM5
    SERCOM(SERCOM5, 0)
    #else
    NO_SERCOM
    #endif
    );
#endif
#ifdef PIN_PA23
PIN(PA23, EXTINT_CHANNEL(7), NO_ADC, NO_TOUCH,
    TC(TC4, 1, 1),
    TCC(TCC0, 1, 5),
    SERCOM(SERCOM3, 1),
    #ifdef SERCOM5
    SERCOM(SERCOM5, 1)
    #else
    NO_SERCOM
    #endif
    );
#endif
#ifdef PIN_PA24
PIN(PA24, EXTINT_CHANNEL(12), NO_ADC, NO_TOUCH,
    NO_TIMER, // TC(TC5, 0, 0),
    TCC(TCC0, 2, 2),
    SERCOM(SERCOM3, 2),
    #ifdef SERCOM5
    SERCOM(SERCOM5, 2)
    #else
    NO_SERCOM
    #endif
    );
#endif
#ifdef PIN_PA25
PIN(PA25, EXTINT_CHANNEL(13), NO_ADC, NO_TOUCH,
    TC(TC5, 1, 1),
    TCC(TCC1, 1, 3),
    SERCOM(SERCOM3, 3),
    #ifdef SERCOM5
    SERCOM(SERCOM5, 3)
    #else
    NO_SERCOM
    #endif
    );
#endif
#ifdef PIN_PB22
PIN(PB22, EXTINT_CHANNEL(6), NO_ADC, NO_TOUCH,
    #ifdef _SAMD21_TC7_INSTANCE_
    NO_TIMER, // TC(TC7, 0, 0),
    #else
    NO_TIMER,
    #endif
    NO_TIMER,
    NO_SERCOM,
    SERCOM(SERCOM5, 2));
#endif
#ifdef PIN_PB23
PIN(PB23, EXTINT_CHANNEL(7), NO_ADC, NO_TOUCH,
    #ifdef _SAMD21_TC7_INSTANCE_
    TC(TC7, 1, 1),
    #else
    NO_TIMER,
    #endif
    NO_TIMER,
    NO_SERCOM,
    SERCOM(SERCOM5, 3));
#endif
#ifdef PIN_PA27
PIN(PA27, EXTINT_CHANNEL(15), NO_ADC, NO_TOUCH,
    NO_TIMER,
    NO_TIMER,
    NO_SERCOM,
    NO_SERCOM);
#endif
#ifdef PIN_PA28
PIN(PA28, EXTINT_CHANNEL(8), NO_ADC, NO_TOUCH,
    NO_TIMER,
    NO_TIMER,
    NO_SERCOM,
    NO_SERCOM);
#endif
#ifdef PIN_PA30
PIN(PA30, EXTINT_CHANNEL(10), NO_ADC, NO_TOUCH,
    TCC(TCC1, 0, 0),
    NO_TIMER,
    NO_SERCOM,
    SERCOM(SERCOM1, 2));
#endif
#ifdef PIN_PA31
PIN(PA31, EXTINT_CHANNEL(11), NO_ADC, NO_TOUCH,
    TCC(TCC1, 1, 1),
    NO_TIMER,
    NO_SERCOM,
    SERCOM(SERCOM1, 3));
#endif
#ifdef PIN_PB30
PIN(PB30, EXTINT_CHANNEL(14), NO_ADC, NO_TOUCH,
    TCC(TCC0, 0, 0),
    TCC(TCC1, 0, 2),
    NO_SERCOM,
    SERCOM(SERCOM5, 0));
#endif
#ifdef PIN_PB31
PIN(PB31, EXTINT_CHANNEL(15), NO_ADC, NO_TOUCH,
    TCC(TCC0, 1, 1),
    TCC(TCC1, 1, 3),
    NO_SERCOM,
    SERCOM(SERCOM5, 1));
#endif
#ifdef PIN_PB00
PIN(PB00, EXTINT_CHANNEL(0), ADC_INPUT(ADC_POSITIVE_INPUT_PIN8), TOUCH(6),
    #ifdef _SAMD21_TC7_INSTANCE_
    NO_TIMER, // TC(TC7, 0, 0),
    #else
    NO_TIMER,
    #endif
    NO_TIMER,
    NO_SERCOM,
    SERCOM(SERCOM5, 2));
#endif
#ifdef PIN_PB01
PIN(PB01, EXTINT_CHANNEL(1), ADC_INPUT(ADC_POSITIVE_INPUT_PIN9), TOUCH(7),
    #ifdef _SAMD21_TC7_INSTANCE_
    TC(TC7, 1, 1),
    #else
    NO_TIMER,
    #endif
    NO_TIMER,
    NO_SERCOM,
    SERCOM(SERCOM5, 3));
#endif
#ifdef PIN_PB02
PIN(PB02, EXTINT_CHANNEL(2), ADC_INPUT(ADC_POSITIVE_INPUT_PIN10), TOUCH(8),
    #ifdef _SAMD21_TC6_INSTANCE_
    NO_TIMER, // TC(TC6, 0, 0),
    #else
    NO_TIMER,
    #endif
    NO_TIMER,
    NO_SERCOM,
    SERCOM(SERCOM5, 0));
#endif
#ifdef PIN_PB03
PIN(PB03, EXTINT_CHANNEL(3), ADC_INPUT(ADC_POSITIVE_INPUT_PIN11), TOUCH(9),
    #ifdef _SAMD21_TC6_INSTANCE_
    TC(TC6, 1, 1),
    #else
    NO_TIMER,
    #endif
    NO_TIMER,
    NO_SERCOM,
    SERCOM(SERCOM5, 1));
#endif