diff options
Diffstat (limited to 'sound/isa/gus/gus_irq.c')
| -rw-r--r-- | sound/isa/gus/gus_irq.c | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/sound/isa/gus/gus_irq.c b/sound/isa/gus/gus_irq.c new file mode 100644 index 00000000000..1e2a15eb810 --- /dev/null +++ b/sound/isa/gus/gus_irq.c @@ -0,0 +1,142 @@ +/* + * 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) +{ + snd_gus_card_t * 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; + snd_gus_voice_t *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(snd_info_entry_t *entry, + snd_info_buffer_t * buffer) +{ + snd_gus_card_t *gus; + snd_gus_voice_t *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(snd_gus_card_t *gus) +{ + snd_info_entry_t *entry; + + if (! snd_card_proc_new(gus->card, "gusirq", &entry)) + snd_info_set_text_ops(entry, gus, 1024, snd_gus_irq_info_read); +} + +#endif |