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/*
* Cirrus EP7312 Intererrupt handler
*
* Copyright (c) 2002 by Jay Monkman <jtm@smoothsmoothie.com>
*
* Copyright (c) 2002 by Charlie Steader <charlies@poliac.com>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
*
* http://www.rtems.com/license/LICENSE.
*
*
* $Id$
*/
#include <bsp.h>
#include <irq.h>
#include <rtems/score/thread.h>
#include <rtems/score/apiext.h>
#include <ep7312.h>
/*
* This function check that the value given for the irq line
* is valid.
*/
static int isValidInterrupt(int irq)
{
if ( (irq < 0) || (irq > BSP_MAX_INT))
return 0;
return 1;
}
/*
* -------------------- RTEMS Single Irq Handler Mngt Routines ----------------
*/
int BSP_install_rtems_irq_handler (const rtems_irq_connect_data* irq)
{
rtems_irq_hdl *HdlTable;
rtems_interrupt_level level;
if (!isValidInterrupt(irq->name)) {
return 0;
}
/*
* Check if default handler is actually connected. If not issue an error.
*/
HdlTable = (rtems_irq_hdl *) VECTOR_TABLE;
if (*(HdlTable + irq->name) != default_int_handler) {
return 0;
}
rtems_interrupt_disable(level);
/*
* store the new handler
*/
*(HdlTable + irq->name) = irq->hdl;
/*
* unmask interrupt
*/
if(irq->name >= BSP_EXTFIQ && irq->name <= BSP_SSEOTI)
{
/* interrupt managed by INTMR1 and INTSR1 */
*EP7312_INTMR1 |= (1 << irq->name);
}
else if(irq->name >= BSP_KBDINT && irq->name <= BSP_SS2TX)
{
/* interrupt managed by INTMR2 and INTSR2 */
*EP7312_INTMR2 |= (1 << (irq->name - 16));
}
else if(irq->name >= BSP_UTXINT2 && irq->name <= BSP_URXINT2)
{
/* interrupt managed by INTMR2 and INTSR2 */
*EP7312_INTMR2 |= (1 << (irq->name - 7));
}
else if(irq->name == BSP_DAIINT)
{
/* interrupt managed by INTMR3 and INTSR3 */
*EP7312_INTMR3 |= (1 << (irq->name - 21));
}
/*
* Enable interrupt on device
*/
if(irq->on)
{
irq->on(irq);
}
rtems_interrupt_enable(level);
return 1;
}
int BSP_remove_rtems_irq_handler (const rtems_irq_connect_data* irq)
{
rtems_irq_hdl *HdlTable;
rtems_interrupt_level level;
if (!isValidInterrupt(irq->name)) {
return 0;
}
/*
* Check if the handler is actually connected. If not issue an error.
*/
HdlTable = (rtems_irq_hdl *) VECTOR_TABLE;
if (*(HdlTable + irq->name) != irq->hdl) {
return 0;
}
rtems_interrupt_disable(level);
/*
* mask interrupt
*/
if(irq->name >= BSP_EXTFIQ && irq->name <= BSP_SSEOTI)
{
/* interrupt managed by INTMR1 and INTSR1 */
*EP7312_INTMR1 &= ~(1 << irq->name);
}
else if(irq->name >= BSP_KBDINT && irq->name <= BSP_SS2TX)
{
/* interrupt managed by INTMR2 and INTSR2 */
*EP7312_INTMR2 &= ~(1 << (irq->name - 16));
}
else if(irq->name >= BSP_UTXINT2 && irq->name <= BSP_URXINT2)
{
/* interrupt managed by INTMR2 and INTSR2 */
*EP7312_INTMR2 &= ~(1 << (irq->name - 7));
}
else if(irq->name == BSP_DAIINT)
{
/* interrupt managed by INTMR3 and INTSR3 */
*EP7312_INTMR3 &= ~(1 << (irq->name - 21));
}
/*
* Disable interrupt on device
*/
if(irq->off)
irq->off(irq);
/*
* restore the default irq value
*/
*(HdlTable + irq->name) = default_int_handler;
rtems_interrupt_enable(level);
return 1;
}
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