/* * Routine for IRQ handling from GF1/InterWave chip * Copyright (c) by Jaroslav Kysela <perex@suse.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/driver.h> #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 pt_regs *regs) { 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("IRQ: status = 0x%x\n", status); if (status & 0x02) { STAT_ADD(gus->gf1.interrupt_stat_midi_in); gus->gf1.interrupt_handler_midi_in(gus); } if (status & 0x01) { STAT_ADD(gus->gf1.interrupt_stat_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("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); gus->gf1.interrupt_handler_timer1(gus); } if (status & 0x08) { STAT_ADD(gus->gf1.interrupt_stat_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); 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); 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