--- /dev/null
+/*
+ * 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
Code Review / kvmfornfv.git / blobdiff