diff options
Diffstat (limited to 'sound/isa/gus/gus_irq.c')
| -rw-r--r-- | sound/isa/gus/gus_irq.c | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/sound/isa/gus/gus_irq.c b/sound/isa/gus/gus_irq.c new file mode 100644 index 000000000..226b8438a --- /dev/null +++ b/sound/isa/gus/gus_irq.c @@ -0,0 +1,131 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Routine for IRQ handling from GF1/InterWave chip + * Copyright (c) by Jaroslav Kysela <perex@perex.cz> + */ + +#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) +{ + snd_card_ro_proc_new(gus->card, "gusirq", gus, snd_gus_irq_info_read); +} + +#endif |