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2619862fba
Instead of using the timer/counter peripheral to handle the waiting time and corresponding timeout, the USART peripheral internal timeout mechanism is used. This is particularly important for the SIMtrace board since there (contrary to other boards) the I/O signal is not wired to a TIO pin of the timer/counter block, and hence Rx/Tx data cannot reset that timer/counter. As a result of this migration, cardem is now supported not only on owhw + qmod, but also on the simtrace board. The guts of this change have been lifted out of Change-Id Ibcb2c8cace9137695adf5fb3de43566f7cfb93b5 by Kevin Redon, which was unfortunately touching various different topics at the same time and hence was split up. Some improvements are the introduction of the ENABLE_TX_TIMER_ONLY mode, which avoids the USART interrupt handler getting hammered with TXRDY between release of RST and start of the ATR. Change-Id: Ibcb2c8cace9137695adf5fb3de43566f7cfb93b5
79 lines
3.0 KiB
C
79 lines
3.0 KiB
C
/* ISO7816-3 state machine for the card side
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*
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* (C) 2010-2017 by Harald Welte <hwelte@hmw-consulting.de>
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* (C) 2018 by sysmocom -s.f.m.c. GmbH, Author: Kevin Redon <kredon@sysmocom.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA
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*/
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#pragma once
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#include <stdint.h>
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struct card_handle;
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enum card_io {
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CARD_IO_VCC,
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CARD_IO_RST,
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CARD_IO_CLK,
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};
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/** initialise card slot
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* @param[in] slot_num slot number (arbitrary number)
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* @param[in] uart_chan UART peripheral channel
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* @param[in] in_ep USB IN end point number
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* @param[in] irq_ep USB INTerrupt end point number
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* @param[in] vcc_active initial VCC signal state (true = on)
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* @param[in] in_reset initial RST signal state (true = reset asserted)
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* @param[in] clocked initial CLK signat state (true = active)
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* @return main card handle reference
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*/
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struct card_handle *card_emu_init(uint8_t slot_num, uint8_t uart_chan, uint8_t in_ep, uint8_t irq_ep, bool vcc_active, bool in_reset, bool clocked);
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/* process a single byte received from the reader */
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void card_emu_process_rx_byte(struct card_handle *ch, uint8_t byte);
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/* transmit a single byte to the reader */
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int card_emu_tx_byte(struct card_handle *ch);
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/* hardware driver informs us that a card I/O signal has changed */
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void card_emu_io_statechg(struct card_handle *ch, enum card_io io, int active);
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/* User sets a new ATR to be returned during next card reset */
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int card_emu_set_atr(struct card_handle *ch, const uint8_t *atr, uint8_t len);
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struct llist_head *card_emu_get_uart_tx_queue(struct card_handle *ch);
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void card_emu_have_new_uart_tx(struct card_handle *ch);
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void card_emu_report_status(struct card_handle *ch, bool report_on_irq);
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void card_emu_wtime_half_expired(void *ch);
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void card_emu_wtime_expired(void *ch);
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#define ENABLE_TX 0x01
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#define ENABLE_RX 0x02
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#define ENABLE_TX_TIMER_ONLY 0x03
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int card_emu_uart_update_fidi(uint8_t uart_chan, unsigned int fidi);
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void card_emu_uart_update_wt(uint8_t uart_chan, uint32_t wt);
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void card_emu_uart_reset_wt(uint8_t uart_chan);
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int card_emu_uart_tx(uint8_t uart_chan, uint8_t byte);
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void card_emu_uart_enable(uint8_t uart_chan, uint8_t rxtx);
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void card_emu_uart_wait_tx_idle(uint8_t uart_chan);
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void card_emu_uart_interrupt(uint8_t uart_chan);
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struct cardemu_usb_msg_config;
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int card_emu_set_config(struct card_handle *ch, const struct cardemu_usb_msg_config *scfg,
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unsigned int scfg_len);
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