firmware/libcommon/include/card_emu.h

#pragma once

#include <stdint.h>

struct card_handle;

enum card_io {
	CARD_IO_VCC,
	CARD_IO_RST,
	CARD_IO_CLK,
};

struct card_handle *card_emu_init(uint8_t slot_num, uint8_t tc_chan, uint8_t uart_chan,
				  uint8_t in_ep, uint8_t irq_ep);

/* process a single byte received from the reader */
void card_emu_process_rx_byte(struct card_handle *ch, uint8_t byte);

/* transmit a single byte to the reader */
int card_emu_tx_byte(struct card_handle *ch);

/* hardware driver informs us that a card I/O signal has changed */
void card_emu_io_statechg(struct card_handle *ch, enum card_io io, int active);

/* User sets a new ATR to be returned during next card reset */
int card_emu_set_atr(struct card_handle *ch, const uint8_t *atr, uint8_t len);

struct llist_head *card_emu_get_uart_tx_queue(struct card_handle *ch);
void card_emu_have_new_uart_tx(struct card_handle *ch);
void card_emu_report_status(struct card_handle *ch);

#define ENABLE_TX	0x01
#define ENABLE_RX	0x02

int card_emu_uart_update_fidi(uint8_t uart_chan, unsigned int fidi);
int card_emu_uart_tx(uint8_t uart_chan, uint8_t byte);
void card_emu_uart_enable(uint8_t uart_chan, uint8_t rxtx);
void card_emu_uart_wait_tx_idle(uint8_t uart_chan);