- 根目录:
- sound
- pci
- emu10k1
- irq.c
/*
* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
* Creative Labs, Inc.
* Routines for IRQ control of EMU10K1 chips
*
* BUGS:
* --
*
* TODO:
* --
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <linux/time.h>
#include <sound/core.h>
#include <sound/emu10k1.h>
irqreturn_t snd_emu10k1_interrupt(int irq, void *dev_id)
{
struct snd_emu10k1 *emu = dev_id;
unsigned int status, status2, orig_status, orig_status2;
int handled = 0;
int timeout = 0;
while (((status = inl(emu->port + IPR)) != 0) && (timeout < 1000)) {
timeout++;
orig_status = status;
handled = 1;
if ((status & 0xffffffff) == 0xffffffff) {
snd_printk(KERN_INFO "snd-emu10k1: Suspected sound card removal\n");
break;
}
if (status & IPR_PCIERROR) {
snd_printk(KERN_ERR "interrupt: PCI error\n");
snd_emu10k1_intr_disable(emu, INTE_PCIERRORENABLE);
status &= ~IPR_PCIERROR;
}
if (status & (IPR_VOLINCR|IPR_VOLDECR|IPR_MUTE)) {
if (emu->hwvol_interrupt)
emu->hwvol_interrupt(emu, status);
else
snd_emu10k1_intr_disable(emu, INTE_VOLINCRENABLE|INTE_VOLDECRENABLE|INTE_MUTEENABLE);
status &= ~(IPR_VOLINCR|IPR_VOLDECR|IPR_MUTE);
}
if (status & IPR_CHANNELLOOP) {
int voice;
int voice_max = status & IPR_CHANNELNUMBERMASK;
u32 val;
struct snd_emu10k1_voice *pvoice = emu->voices;
val = snd_emu10k1_ptr_read(emu, CLIPL, 0);
for (voice = 0; voice <= voice_max; voice++) {
if (voice == 0x20)
val = snd_emu10k1_ptr_read(emu, CLIPH, 0);
if (val & 1) {
if (pvoice->use && pvoice->interrupt != NULL) {
pvoice->interrupt(emu, pvoice);
snd_emu10k1_voice_intr_ack(emu, voice);
} else {
snd_emu10k1_voice_intr_disable(emu, voice);
}
}
val >>= 1;
pvoice++;
}
val = snd_emu10k1_ptr_read(emu, HLIPL, 0);
for (voice = 0; voice <= voice_max; voice++) {
if (voice == 0x20)
val = snd_emu10k1_ptr_read(emu, HLIPH, 0);
if (val & 1) {
if (pvoice->use && pvoice->interrupt != NULL) {
pvoice->interrupt(emu, pvoice);
snd_emu10k1_voice_half_loop_intr_ack(emu, voice);
} else {
snd_emu10k1_voice_half_loop_intr_disable(emu, voice);
}
}
val >>= 1;
pvoice++;
}
status &= ~IPR_CHANNELLOOP;
}
status &= ~IPR_CHANNELNUMBERMASK;
if (status & (IPR_ADCBUFFULL|IPR_ADCBUFHALFFULL)) {
if (emu->capture_interrupt)
emu->capture_interrupt(emu, status);
else
snd_emu10k1_intr_disable(emu, INTE_ADCBUFENABLE);
status &= ~(IPR_ADCBUFFULL|IPR_ADCBUFHALFFULL);
}
if (status & (IPR_MICBUFFULL|IPR_MICBUFHALFFULL)) {
if (emu->capture_mic_interrupt)
emu->capture_mic_interrupt(emu, status);
else
snd_emu10k1_intr_disable(emu, INTE_MICBUFENABLE);
status &= ~(IPR_MICBUFFULL|IPR_MICBUFHALFFULL);
}
if (status & (IPR_EFXBUFFULL|IPR_EFXBUFHALFFULL)) {
if (emu->capture_efx_interrupt)
emu->capture_efx_interrupt(emu, status);
else
snd_emu10k1_intr_disable(emu, INTE_EFXBUFENABLE);
status &= ~(IPR_EFXBUFFULL|IPR_EFXBUFHALFFULL);
}
if (status & (IPR_MIDITRANSBUFEMPTY|IPR_MIDIRECVBUFEMPTY)) {
if (emu->midi.interrupt)
emu->midi.interrupt(emu, status);
else
snd_emu10k1_intr_disable(emu, INTE_MIDITXENABLE|INTE_MIDIRXENABLE);
status &= ~(IPR_MIDITRANSBUFEMPTY|IPR_MIDIRECVBUFEMPTY);
}
if (status & (IPR_A_MIDITRANSBUFEMPTY2|IPR_A_MIDIRECVBUFEMPTY2)) {
if (emu->midi2.interrupt)
emu->midi2.interrupt(emu, status);
else
snd_emu10k1_intr_disable(emu, INTE_A_MIDITXENABLE2|INTE_A_MIDIRXENABLE2);
status &= ~(IPR_A_MIDITRANSBUFEMPTY2|IPR_A_MIDIRECVBUFEMPTY2);
}
if (status & IPR_INTERVALTIMER) {
if (emu->timer)
snd_timer_interrupt(emu->timer, emu->timer->sticks);
else
snd_emu10k1_intr_disable(emu, INTE_INTERVALTIMERENB);
status &= ~IPR_INTERVALTIMER;
}
if (status & (IPR_GPSPDIFSTATUSCHANGE|IPR_CDROMSTATUSCHANGE)) {
if (emu->spdif_interrupt)
emu->spdif_interrupt(emu, status);
else
snd_emu10k1_intr_disable(emu, INTE_GPSPDIFENABLE|INTE_CDSPDIFENABLE);
status &= ~(IPR_GPSPDIFSTATUSCHANGE|IPR_CDROMSTATUSCHANGE);
}
if (status & IPR_FXDSP) {
if (emu->dsp_interrupt)
emu->dsp_interrupt(emu);
else
snd_emu10k1_intr_disable(emu, INTE_FXDSPENABLE);
status &= ~IPR_FXDSP;
}
if (status & IPR_P16V) {
while ((status2 = inl(emu->port + IPR2)) != 0) {
u32 mask = INTE2_PLAYBACK_CH_0_LOOP; /* Full Loop */
struct snd_emu10k1_voice *pvoice = &(emu->p16v_voices[0]);
struct snd_emu10k1_voice *cvoice = &(emu->p16v_capture_voice);
//printk(KERN_INFO "status2=0x%x\n", status2);
orig_status2 = status2;
if(status2 & mask) {
if(pvoice->use) {
snd_pcm_period_elapsed(pvoice->epcm->substream);
} else {
snd_printk(KERN_ERR "p16v: status: 0x%08x, mask=0x%08x, pvoice=%p, use=%d\n", status2, mask, pvoice, pvoice->use);
}
}
if(status2 & 0x110000) {
//printk(KERN_INFO "capture int found\n");
if(cvoice->use) {
//printk(KERN_INFO "capture period_elapsed\n");
snd_pcm_period_elapsed(cvoice->epcm->substream);
}
}
outl(orig_status2, emu->port + IPR2); /* ack all */
}
status &= ~IPR_P16V;
}
if (status) {
unsigned int bits;
snd_printk(KERN_ERR "emu10k1: unhandled interrupt: 0x%08x\n", status);
//make sure any interrupts we don't handle are disabled:
bits = INTE_FXDSPENABLE |
INTE_PCIERRORENABLE |
INTE_VOLINCRENABLE |
INTE_VOLDECRENABLE |
INTE_MUTEENABLE |
INTE_MICBUFENABLE |
INTE_ADCBUFENABLE |
INTE_EFXBUFENABLE |
INTE_GPSPDIFENABLE |
INTE_CDSPDIFENABLE |
INTE_INTERVALTIMERENB |
INTE_MIDITXENABLE |
INTE_MIDIRXENABLE;
if (emu->audigy)
bits |= INTE_A_MIDITXENABLE2 | INTE_A_MIDIRXENABLE2;
snd_emu10k1_intr_disable(emu, bits);
}
outl(orig_status, emu->port + IPR); /* ack all */
}
if (timeout == 1000)
snd_printk(KERN_INFO "emu10k1 irq routine failure\n");
return IRQ_RETVAL(handled);
}