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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Routine for IRQ handling from GF1/InterWave chip
* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
*/
#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)
{
snd_card_ro_proc_new(gus->card, "gusirq", gus, snd_gus_irq_info_read);
}
#endif
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