150 строки
4.7 KiB
C
150 строки
4.7 KiB
C
/*
|
|
* Routine for IRQ handling from GF1/InterWave chip
|
|
* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
|
|
*
|
|
*
|
|
* 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 <sound/core.h>
|
|
#include <sound/info.h>
|
|
#include <sound/gus.h>
|
|
|
|
#ifdef CONFIG_SND_DEBUG
|
|
#define STAT_ADD(x) ((x)++)
|
|
#else
|
|
#define STAT_ADD(x) while (0) { ; }
|
|
#endif
|
|
|
|
irqreturn_t snd_gus_interrupt(int irq, void *dev_id)
|
|
{
|
|
struct snd_gus_card * gus = dev_id;
|
|
unsigned char status;
|
|
int loop = 100;
|
|
int handled = 0;
|
|
|
|
__again:
|
|
status = inb(gus->gf1.reg_irqstat);
|
|
if (status == 0)
|
|
return IRQ_RETVAL(handled);
|
|
handled = 1;
|
|
/* snd_printk(KERN_DEBUG "IRQ: status = 0x%x\n", status); */
|
|
if (status & 0x02) {
|
|
STAT_ADD(gus->gf1.interrupt_stat_midi_in);
|
|
if (gus->gf1.interrupt_handler_midi_in)
|
|
gus->gf1.interrupt_handler_midi_in(gus);
|
|
}
|
|
if (status & 0x01) {
|
|
STAT_ADD(gus->gf1.interrupt_stat_midi_out);
|
|
if (gus->gf1.interrupt_handler_midi_out)
|
|
gus->gf1.interrupt_handler_midi_out(gus);
|
|
}
|
|
if (status & (0x20 | 0x40)) {
|
|
unsigned int already, _current_;
|
|
unsigned char voice_status, voice;
|
|
struct snd_gus_voice *pvoice;
|
|
|
|
already = 0;
|
|
while (((voice_status = snd_gf1_i_read8(gus, SNDRV_GF1_GB_VOICES_IRQ)) & 0xc0) != 0xc0) {
|
|
voice = voice_status & 0x1f;
|
|
_current_ = 1 << voice;
|
|
if (already & _current_)
|
|
continue; /* multi request */
|
|
already |= _current_; /* mark request */
|
|
#if 0
|
|
printk(KERN_DEBUG "voice = %i, voice_status = 0x%x, "
|
|
"voice_verify = %i\n",
|
|
voice, voice_status, inb(GUSP(gus, GF1PAGE)));
|
|
#endif
|
|
pvoice = &gus->gf1.voices[voice];
|
|
if (pvoice->use) {
|
|
if (!(voice_status & 0x80)) { /* voice position IRQ */
|
|
STAT_ADD(pvoice->interrupt_stat_wave);
|
|
pvoice->handler_wave(gus, pvoice);
|
|
}
|
|
if (!(voice_status & 0x40)) { /* volume ramp IRQ */
|
|
STAT_ADD(pvoice->interrupt_stat_volume);
|
|
pvoice->handler_volume(gus, pvoice);
|
|
}
|
|
} else {
|
|
STAT_ADD(gus->gf1.interrupt_stat_voice_lost);
|
|
snd_gf1_i_ctrl_stop(gus, SNDRV_GF1_VB_ADDRESS_CONTROL);
|
|
snd_gf1_i_ctrl_stop(gus, SNDRV_GF1_VB_VOLUME_CONTROL);
|
|
}
|
|
}
|
|
}
|
|
if (status & 0x04) {
|
|
STAT_ADD(gus->gf1.interrupt_stat_timer1);
|
|
if (gus->gf1.interrupt_handler_timer1)
|
|
gus->gf1.interrupt_handler_timer1(gus);
|
|
}
|
|
if (status & 0x08) {
|
|
STAT_ADD(gus->gf1.interrupt_stat_timer2);
|
|
if (gus->gf1.interrupt_handler_timer2)
|
|
gus->gf1.interrupt_handler_timer2(gus);
|
|
}
|
|
if (status & 0x80) {
|
|
if (snd_gf1_i_look8(gus, SNDRV_GF1_GB_DRAM_DMA_CONTROL) & 0x40) {
|
|
STAT_ADD(gus->gf1.interrupt_stat_dma_write);
|
|
if (gus->gf1.interrupt_handler_dma_write)
|
|
gus->gf1.interrupt_handler_dma_write(gus);
|
|
}
|
|
if (snd_gf1_i_look8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL) & 0x40) {
|
|
STAT_ADD(gus->gf1.interrupt_stat_dma_read);
|
|
if (gus->gf1.interrupt_handler_dma_read)
|
|
gus->gf1.interrupt_handler_dma_read(gus);
|
|
}
|
|
}
|
|
if (--loop > 0)
|
|
goto __again;
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
#ifdef CONFIG_SND_DEBUG
|
|
static void snd_gus_irq_info_read(struct snd_info_entry *entry,
|
|
struct snd_info_buffer *buffer)
|
|
{
|
|
struct snd_gus_card *gus;
|
|
struct snd_gus_voice *pvoice;
|
|
int idx;
|
|
|
|
gus = entry->private_data;
|
|
snd_iprintf(buffer, "midi out = %u\n", gus->gf1.interrupt_stat_midi_out);
|
|
snd_iprintf(buffer, "midi in = %u\n", gus->gf1.interrupt_stat_midi_in);
|
|
snd_iprintf(buffer, "timer1 = %u\n", gus->gf1.interrupt_stat_timer1);
|
|
snd_iprintf(buffer, "timer2 = %u\n", gus->gf1.interrupt_stat_timer2);
|
|
snd_iprintf(buffer, "dma write = %u\n", gus->gf1.interrupt_stat_dma_write);
|
|
snd_iprintf(buffer, "dma read = %u\n", gus->gf1.interrupt_stat_dma_read);
|
|
snd_iprintf(buffer, "voice lost = %u\n", gus->gf1.interrupt_stat_voice_lost);
|
|
for (idx = 0; idx < 32; idx++) {
|
|
pvoice = &gus->gf1.voices[idx];
|
|
snd_iprintf(buffer, "voice %i: wave = %u, volume = %u\n",
|
|
idx,
|
|
pvoice->interrupt_stat_wave,
|
|
pvoice->interrupt_stat_volume);
|
|
}
|
|
}
|
|
|
|
void snd_gus_irq_profile_init(struct snd_gus_card *gus)
|
|
{
|
|
struct snd_info_entry *entry;
|
|
|
|
if (! snd_card_proc_new(gus->card, "gusirq", &entry))
|
|
snd_info_set_text_ops(entry, gus, snd_gus_irq_info_read);
|
|
}
|
|
|
|
#endif
|