132 lines
3.9 KiB
C
132 lines
3.9 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Routine for IRQ handling from GF1/InterWave chip
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* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
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*/
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#include <sound/core.h>
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#include <sound/info.h>
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#include <sound/gus.h>
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#ifdef CONFIG_SND_DEBUG
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#define STAT_ADD(x) ((x)++)
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#else
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#define STAT_ADD(x) while (0) { ; }
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#endif
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irqreturn_t snd_gus_interrupt(int irq, void *dev_id)
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{
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struct snd_gus_card * gus = dev_id;
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unsigned char status;
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int loop = 100;
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int handled = 0;
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__again:
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status = inb(gus->gf1.reg_irqstat);
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if (status == 0)
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return IRQ_RETVAL(handled);
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handled = 1;
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/* snd_printk(KERN_DEBUG "IRQ: status = 0x%x\n", status); */
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if (status & 0x02) {
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STAT_ADD(gus->gf1.interrupt_stat_midi_in);
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if (gus->gf1.interrupt_handler_midi_in)
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gus->gf1.interrupt_handler_midi_in(gus);
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}
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if (status & 0x01) {
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STAT_ADD(gus->gf1.interrupt_stat_midi_out);
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if (gus->gf1.interrupt_handler_midi_out)
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gus->gf1.interrupt_handler_midi_out(gus);
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}
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if (status & (0x20 | 0x40)) {
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unsigned int already, _current_;
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unsigned char voice_status, voice;
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struct snd_gus_voice *pvoice;
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already = 0;
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while (((voice_status = snd_gf1_i_read8(gus, SNDRV_GF1_GB_VOICES_IRQ)) & 0xc0) != 0xc0) {
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voice = voice_status & 0x1f;
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_current_ = 1 << voice;
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if (already & _current_)
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continue; /* multi request */
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already |= _current_; /* mark request */
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#if 0
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printk(KERN_DEBUG "voice = %i, voice_status = 0x%x, "
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"voice_verify = %i\n",
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voice, voice_status, inb(GUSP(gus, GF1PAGE)));
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#endif
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pvoice = &gus->gf1.voices[voice];
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if (pvoice->use) {
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if (!(voice_status & 0x80)) { /* voice position IRQ */
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STAT_ADD(pvoice->interrupt_stat_wave);
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pvoice->handler_wave(gus, pvoice);
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}
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if (!(voice_status & 0x40)) { /* volume ramp IRQ */
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STAT_ADD(pvoice->interrupt_stat_volume);
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pvoice->handler_volume(gus, pvoice);
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}
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} else {
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STAT_ADD(gus->gf1.interrupt_stat_voice_lost);
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snd_gf1_i_ctrl_stop(gus, SNDRV_GF1_VB_ADDRESS_CONTROL);
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snd_gf1_i_ctrl_stop(gus, SNDRV_GF1_VB_VOLUME_CONTROL);
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}
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}
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}
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if (status & 0x04) {
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STAT_ADD(gus->gf1.interrupt_stat_timer1);
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if (gus->gf1.interrupt_handler_timer1)
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gus->gf1.interrupt_handler_timer1(gus);
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}
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if (status & 0x08) {
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STAT_ADD(gus->gf1.interrupt_stat_timer2);
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if (gus->gf1.interrupt_handler_timer2)
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gus->gf1.interrupt_handler_timer2(gus);
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}
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if (status & 0x80) {
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if (snd_gf1_i_look8(gus, SNDRV_GF1_GB_DRAM_DMA_CONTROL) & 0x40) {
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STAT_ADD(gus->gf1.interrupt_stat_dma_write);
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if (gus->gf1.interrupt_handler_dma_write)
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gus->gf1.interrupt_handler_dma_write(gus);
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}
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if (snd_gf1_i_look8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL) & 0x40) {
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STAT_ADD(gus->gf1.interrupt_stat_dma_read);
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if (gus->gf1.interrupt_handler_dma_read)
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gus->gf1.interrupt_handler_dma_read(gus);
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}
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}
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if (--loop > 0)
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goto __again;
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return IRQ_NONE;
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}
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#ifdef CONFIG_SND_DEBUG
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static void snd_gus_irq_info_read(struct snd_info_entry *entry,
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struct snd_info_buffer *buffer)
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{
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struct snd_gus_card *gus;
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struct snd_gus_voice *pvoice;
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int idx;
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gus = entry->private_data;
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snd_iprintf(buffer, "midi out = %u\n", gus->gf1.interrupt_stat_midi_out);
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snd_iprintf(buffer, "midi in = %u\n", gus->gf1.interrupt_stat_midi_in);
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snd_iprintf(buffer, "timer1 = %u\n", gus->gf1.interrupt_stat_timer1);
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snd_iprintf(buffer, "timer2 = %u\n", gus->gf1.interrupt_stat_timer2);
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snd_iprintf(buffer, "dma write = %u\n", gus->gf1.interrupt_stat_dma_write);
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snd_iprintf(buffer, "dma read = %u\n", gus->gf1.interrupt_stat_dma_read);
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snd_iprintf(buffer, "voice lost = %u\n", gus->gf1.interrupt_stat_voice_lost);
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for (idx = 0; idx < 32; idx++) {
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pvoice = &gus->gf1.voices[idx];
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snd_iprintf(buffer, "voice %i: wave = %u, volume = %u\n",
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idx,
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pvoice->interrupt_stat_wave,
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pvoice->interrupt_stat_volume);
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}
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}
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void snd_gus_irq_profile_init(struct snd_gus_card *gus)
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{
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snd_card_ro_proc_new(gus->card, "gusirq", gus, snd_gus_irq_info_read);
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}
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#endif
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