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("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("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; }
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; #ifdef CONFIG_DEBUG_PRINTK /* snd_printk(KERN_DEBUG "IRQ: status = 0x%x\n", status); */ #else /* ; #endif 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 #ifdef CONFIG_DEBUG_PRINTK printk(KERN_DEBUG "voice = %i, voice_status = 0x%x, " "voice_verify = %i\n", voice, voice_status, inb(GUSP(gus, GF1PAGE))); #else ; #endif #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); } }