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Diffstat (limited to 'sound/oss/emu10k1/irqmgr.c')
-rw-r--r-- | sound/oss/emu10k1/irqmgr.c | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/sound/oss/emu10k1/irqmgr.c b/sound/oss/emu10k1/irqmgr.c new file mode 100644 index 00000000000..d19b464ba01 --- /dev/null +++ b/sound/oss/emu10k1/irqmgr.c @@ -0,0 +1,113 @@ +/* + ********************************************************************** + * 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); +} |