2.3-InternetRadio/nutos/nut/arch/avr/dev/ih_ee_ready.c

/*
 * Copyright (C) 2001-2005 by egnite Software GmbH. All rights reserved.
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 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the copyright holders nor the names of
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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/*!
 * \file arch/avr/dev/ih_ee_ready.c
 * \brief EEPROM ready interrupt.
 *
 * \verbatim
 * $Id: ih_ee_ready.c 4706 2012-10-06 17:42:01Z haraldkipp $
 * \endverbatim
 */

#include <dev/irqreg.h>

/*!
 * \addtogroup xgIrqReg
 */
/*@{*/

static int AvrEepromRdyIrqCtl(int cmd, void *param);

IRQ_HANDLER sig_EEPROM_READY = {
#ifdef NUT_PERFMON
    0,                          /* Interrupt counter, ir_count. */
#endif
    NULL,                       /* Passed argument, ir_arg. */
    NULL,                       /* Handler subroutine, ir_handler. */
    AvrEepromRdyIrqCtl          /* Interrupt control, ir_ctl. */
};

/*!
 * \brief EEPROM ready interrupt control.
 *
 * \param cmd   Control command.
 *              - NUT_IRQCTL_INIT Initialize and disable interrupt.
 *              - NUT_IRQCTL_ENABLE Enable interrupt.
 *              - NUT_IRQCTL_DISABLE Disable interrupt.
 *              - NUT_IRQCTL_GETPRIO Query interrupt priority.
 *              - NUT_IRQCTL_GETCOUNT Query and clear interrupt counter.
 * \param param Pointer to optional parameter.
 *
 * \return 0 on success, -1 otherwise.
 */
static int AvrEepromRdyIrqCtl(int cmd, void *param)
{
    int rc = 0;
    unsigned int *ival = (unsigned int *) param;
    int_fast8_t enabled = bit_is_set(EECR, EERIE);

    /* Disable interrupt. */
    cbi(EECR, EERIE);

    switch (cmd) {
    case NUT_IRQCTL_INIT:
    case NUT_IRQCTL_DISABLE:
        enabled = 0;
        break;
    case NUT_IRQCTL_ENABLE:
        enabled = 1;
        break;
    case NUT_IRQCTL_GETPRIO:
        *ival = 0;
        break;
#ifdef NUT_PERFMON
    case NUT_IRQCTL_GETCOUNT:
        *ival = (unsigned int) sig_EEPROM_READY.ir_count;
        sig_EEPROM_READY.ir_count = 0;
        break;
#endif
    default:
        rc = -1;
        break;
    }

    /* Enable interrupt. */
    if (enabled) {
        sbi(EECR, EERIE);
    }
    return rc;
}

/* avr-libc names the vector as in the datasheets. As Atmel naming is
 * inconsistant, so is the avr-libc naming.
 * Equalize!
 */
#if !defined(EE_READY_vect) && defined(EE_RDY_vect)
#define EE_READY_vect EE_RDY_vect
#endif

#if defined(EE_READY_vect) || defined(iv_EE_READY)

/*! \fn EE_READY_vect(void)
 * \brief EEPROM ready interrupt entry.
 */
#ifdef __IMAGECRAFT__
#pragma interrupt_handler EE_READY_vect:iv_EE_READY
#endif
NUTSIGNAL(EE_READY_vect, sig_EEPROM_READY)
#else

/*! \fn SIG_EEPROM(void)
 * \brief EEPROM ready interrupt entry.
 */
#ifdef __IMAGECRAFT__
#pragma interrupt_handler SIG_EEPROM:iv_EE_READY
#endif
NUTSIGNAL(SIG_EEPROM, sig_EEPROM_READY)
#endif
/*@}*/