firmware/libcommon/source/mode_ccid.c

/* ----------------------------------------------------------------------------
 *         ATMEL Microcontroller Software Support
 * ----------------------------------------------------------------------------
 * Copyright (c) 2009, Atmel Corporation
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the disclaimer below.
 *
 * Atmel's name may not be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
 * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * ----------------------------------------------------------------------------
 */

#include "board.h"
#include "simtrace.h"

#ifdef HAVE_CCID

/*------------------------------------------------------------------------------
 *          Headers
 *------------------------------------------------------------------------------*/

#include <string.h>

/*------------------------------------------------------------------------------
 *         Internal definitions
 *------------------------------------------------------------------------------*/
/** Maximum ucSize in bytes of the smartcard answer to a command.*/
#define MAX_ANSWER_SIZE         10

/** Maximum ATR ucSize in bytes.*/
#define MAX_ATR_SIZE            55

/*------------------------------------------------------------------------------
 *         Internal variables
 *------------------------------------------------------------------------------*/

/** ISO7816 pins */
static const Pin pinsISO7816[] = { PINS_ISO7816 };

/** Bus switch pins */
static const Pin pinsBus[] = { PINS_BUS_DEFAULT };

/*  SIMcard power pin   */
static const Pin pinsPower[] = { PWR_PINS };

/** ISO7816 RST pin */
static const Pin pinIso7816RstMC = PIN_ISO7816_RSTMC;
static uint8_t sim_inserted = 0;

static struct Usart_info usart_info = {
	.base = USART_SIM,
	.id = ID_USART_SIM,
	.state = USART_RCV
};

/*------------------------------------------------------------------------------
 *         Optional smartcard detection
 *------------------------------------------------------------------------------*/

/** Smartcard detection pin.*/
static const Pin pinSmartCard = SMARTCARD_CONNECT_PIN;

/**
 * PIO interrupt service routine. Checks if the smartcard has been connected
 * or disconnected.
 */
static void ISR_PioSmartCard(const Pin * pPin)
{
/* FIXME: why is pinSmartCard.pio->PIO_ISR the wrong number?
    printf("+++++ Trying to check for pending interrupts (PIO ISR: 0x%X)\n\r", pinSmartCard.pio->PIO_ISR);
    printf("+++++ Mask: 0x%X\n\r", pinSmartCard.mask);
Output:
    +++++ Trying to check for pending interrupts (PIO ISR: 0x400)) = 1<<10
    +++++ Mask: 0x100 = 1<<8
*/
	// PA10 is DTXD, which is the debug uart transmit pin

	printf("Interrupt!!\n\r");
	/*  Check all pending interrupts */
	// FIXME: this if condition is not always true...
//    if ( (pinSmartCard.pio->PIO_ISR & pinSmartCard.mask) != 0 )
	{
		/*  Check current level on pin */
		if (PIO_Get(&pinSmartCard) == 0) {
			sim_inserted = 1;
			printf("-I- Smartcard inserted\n\r");
			CCID_Insertion();
		} else {
			sim_inserted = 0;
			printf("-I- Smartcard removed\n\r");
			CCID_Removal();
		}
	}
}

/**
 * Configures the smartcard detection pin to trigger an interrupt.
 */
static void ConfigureCardDetection(void)
{
	printf("+++++ Configure PIOs\n\r");
	PIO_Configure(&pinSmartCard, 1);
	NVIC_EnableIRQ(PIOA_IRQn);
	PIO_EnableIt(&pinSmartCard);
}

/*-----------------------------------------------------------------------------
 *          Initialization and run
 *-----------------------------------------------------------------------------*/
extern CCIDDriverConfigurationDescriptors configurationDescriptorCCID;

/* Called during USB enumeration after device is enumerated by host */
void CCID_configure(void)
{
	CCIDDriver_Initialize();
// FIXME: Do we need to set priority?: NVIC_SetPriority( PIOA_IRQn, 10);
	PIO_ConfigureIt(&pinSmartCard, ISR_PioSmartCard);
}

/* called when *different* configuration is set by host */
void CCID_exit(void)
{
	PIO_DisableIt(&pinSmartCard);
	USART_SetTransmitterEnabled(usart_info.base, 0);
	USART_SetReceiverEnabled(usart_info.base, 0);
}

/* called when *CCID* configuration is set by host */
void CCID_init(void)
{
	uint8_t pAtr[MAX_ATR_SIZE];
	uint8_t ucSize;

	// FIXME: do we want to print ATR?
	/*  Initialize Atr buffer */
	memset(pAtr, 0, sizeof(pAtr));

	ConfigureCardDetection();

	// Configure ISO7816 driver
	PIO_Configure(pinsISO7816, PIO_LISTSIZE(pinsISO7816));
	PIO_Configure(pinsBus, PIO_LISTSIZE(pinsBus));
	PIO_Configure(pinsPower, PIO_LISTSIZE(pinsPower));

	/* power up the card */
//	PIO_Set(&pinsPower[0]);

	ISO7816_Init(&usart_info, CLK_MASTER);
	USART_SetTransmitterEnabled(usart_info.base, 1);
	USART_SetReceiverEnabled(usart_info.base, 1);

	ISO7816_Set_Reset_Pin(&pinIso7816RstMC);
	/*  Read ATR */
	ISO7816_warm_reset();

	ISO7816_Datablock_ATR(pAtr, &ucSize);

	/*  Decode ATR and print it */
	ISO7816_Decode_ATR(pAtr);

	// FIXME. what if smcard is not inserted?
	if (PIO_Get(&pinSmartCard) == 0) {
		printf("SIM card inserted\n\r");
		CCID_Insertion();
	}
}

/* main (idle/busy) loop of this USB configuration */
void CCID_run(void)
{

	//if (USBD_Read(INT, pBuffer, dLength, fCallback, pArgument);

	CCID_SmartCardRequest();
}
#endif