142 lines
4.4 KiB
C
142 lines
4.4 KiB
C
/*
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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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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <sound/driver.h>
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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("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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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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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("voice = %i, voice_status = 0x%x, voice_verify = %i\n", 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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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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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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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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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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struct snd_info_entry *entry;
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if (! snd_card_proc_new(gus->card, "gusirq", &entry))
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snd_info_set_text_ops(entry, gus, snd_gus_irq_info_read);
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}
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#endif
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