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/* -*- c++ -*- */
/*
* Copyright 2003 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* GNU Radio is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#include "isr.h"
#include "fx2regs.h"
#include "syncdelay.h"
extern xdata unsigned char _standard_interrupt_vector[];
extern xdata unsigned char _usb_autovector[];
extern xdata unsigned char _fifo_gpif_autovector[];
#define LJMP_OPCODE 0x02
/*
* Hook standard interrupt vector.
*
* vector_number is from the SV_<foo> list.
* addr is the address of the interrupt service routine.
*/
void
hook_sv (unsigned char vector_number, unsigned short addr)
{
bit t;
// sanity checks
if (vector_number < SV_MIN || vector_number > SV_MAX)
return;
if ((vector_number & 0x0f) != 0x03 && (vector_number & 0x0f) != 0x0b)
return;
t = EA;
EA = 0;
_standard_interrupt_vector[vector_number] = LJMP_OPCODE;
_standard_interrupt_vector[vector_number + 1] = addr >> 8;
_standard_interrupt_vector[vector_number + 2] = addr & 0xff;
EA = t;
}
/*
* Hook usb interrupt vector.
*
* vector_number is from the UV_<foo> list.
* addr is the address of the interrupt service routine.
*/
void
hook_uv (unsigned char vector_number, unsigned short addr)
{
bit t;
// sanity checks
if (vector_number < UV_MIN || vector_number > UV_MAX)
return;
if ((vector_number & 0x3) != 0)
return;
t = EA;
EA = 0;
_usb_autovector[vector_number] = LJMP_OPCODE;
_usb_autovector[vector_number + 1] = addr >> 8;
_usb_autovector[vector_number + 2] = addr & 0xff;
EA = t;
}
/*
* Hook fifo/gpif interrupt vector.
*
* vector_number is from the FGV_<foo> list.
* addr is the address of the interrupt service routine.
*/
void
hook_fgv (unsigned char vector_number, unsigned short addr)
{
bit t;
// sanity checks
if (vector_number < FGV_MIN || vector_number > FGV_MAX)
return;
if ((vector_number & 0x3) != 0)
return;
t = EA;
EA = 0;
_fifo_gpif_autovector[vector_number] = LJMP_OPCODE;
_fifo_gpif_autovector[vector_number + 1] = addr >> 8;
_fifo_gpif_autovector[vector_number + 2] = addr & 0xff;
EA = t;
}
/*
* One time call to enable autovectoring for both USB and FIFO/GPIF.
*
* This disables all USB and FIFO/GPIF interrupts and clears
* any pending interrupts too. It leaves the master USB and FIFO/GPIF
* interrupts enabled.
*/
void
setup_autovectors (void)
{
// disable master usb and fifo/gpif interrupt enables
EIUSB = 0;
EIEX4 = 0;
hook_sv (SV_INT_2, (unsigned short) _usb_autovector);
hook_sv (SV_INT_4, (unsigned short) _fifo_gpif_autovector);
// disable all fifo interrupt enables
SYNCDELAY;
EP2FIFOIE = 0; SYNCDELAY;
EP4FIFOIE = 0; SYNCDELAY;
EP6FIFOIE = 0; SYNCDELAY;
EP8FIFOIE = 0; SYNCDELAY;
// clear all pending fifo irqs
EP2FIFOIRQ = 0xff; SYNCDELAY;
EP4FIFOIRQ = 0xff; SYNCDELAY;
EP6FIFOIRQ = 0xff; SYNCDELAY;
EP8FIFOIRQ = 0xff; SYNCDELAY;
IBNIE = 0;
IBNIRQ = 0xff;
NAKIE = 0;
NAKIRQ = 0xff;
USBIE = 0;
USBIRQ = 0xff;
EPIE = 0;
EPIRQ = 0xff;
SYNCDELAY; GPIFIE = 0;
SYNCDELAY; GPIFIRQ = 0xff;
USBERRIE = 0;
USBERRIRQ = 0xff;
CLRERRCNT = 0;
INTSETUP = bmAV2EN | bmAV4EN | bmINT4IN;
// clear master irq's for usb and fifo/gpif
EXIF &= ~bmEXIF_USBINT;
EXIF &= ~bmEXIF_IE4;
// enable master usb and fifo/gpif interrrupts
EIUSB = 1;
EIEX4 = 1;
}
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