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/*
**********************************************************************
* irqmgr.c - IRQ manager for emu10k1 driver
* Copyright 1999, 2000 Creative Labs, Inc.
*
**********************************************************************
*
* Date Author Summary of changes
* ---- ------ ------------------
* October 20, 1999 Bertrand Lee base code release
*
**********************************************************************
*
* This program 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 of
* the License, or (at your option) any later version.
*
* This program 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 this program; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
* USA.
*
**********************************************************************
*/
#include "hwaccess.h"
#include "8010.h"
#include "cardmi.h"
#include "cardmo.h"
#include "irqmgr.h"
/* Interrupt handler */
irqreturn_t emu10k1_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
struct emu10k1_card *card = (struct emu10k1_card *) dev_id;
u32 irqstatus, irqstatus_tmp;
int handled = 0;
DPD(4, "emu10k1_interrupt called, irq = %u\n", irq);
/*
** NOTE :
** We do a 'while loop' here cos on certain machines, with both
** playback and recording going on at the same time, IRQs will
** stop coming in after a while. Checking IPND indeed shows that
** there are interrupts pending but the PIC says no IRQs pending.
** I suspect that some boards need edge-triggered IRQs but are not
** getting that condition if we don't completely clear the IPND
** (make sure no more interrupts are pending).
** - Eric
*/
while ((irqstatus = inl(card->iobase + IPR))) {
DPD(4, "irq status %#x\n", irqstatus);
irqstatus_tmp = irqstatus;
if (irqstatus & IRQTYPE_TIMER) {
emu10k1_timer_irqhandler(card);
irqstatus &= ~IRQTYPE_TIMER;
}
if (irqstatus & IRQTYPE_DSP) {
emu10k1_dsp_irqhandler(card);
irqstatus &= ~IRQTYPE_DSP;
}
if (irqstatus & IRQTYPE_MPUIN) {
emu10k1_mpuin_irqhandler(card);
irqstatus &= ~IRQTYPE_MPUIN;
}
if (irqstatus & IRQTYPE_MPUOUT) {
emu10k1_mpuout_irqhandler(card);
irqstatus &= ~IRQTYPE_MPUOUT;
}
if (irqstatus & IPR_MUTE) {
emu10k1_mute_irqhandler(card);
irqstatus &=~IPR_MUTE;
}
if (irqstatus & IPR_VOLINCR) {
emu10k1_volincr_irqhandler(card);
irqstatus &=~IPR_VOLINCR;
}
if (irqstatus & IPR_VOLDECR) {
emu10k1_voldecr_irqhandler(card);
irqstatus &=~IPR_VOLDECR;
}
if (irqstatus){
printk(KERN_ERR "emu10k1: Warning, unhandled interrupt: %#08x\n", irqstatus);
//make sure any interrupts we don't handle are disabled:
emu10k1_irq_disable(card, ~(INTE_MIDIRXENABLE | INTE_MIDITXENABLE | INTE_INTERVALTIMERENB |
INTE_VOLDECRENABLE | INTE_VOLINCRENABLE | INTE_MUTEENABLE |
INTE_FXDSPENABLE));
}
/* acknowledge interrupt */
outl(irqstatus_tmp, card->iobase + IPR);
handled = 1;
}
return IRQ_RETVAL(handled);
}
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