1/* 2 * Routine for IRQ handling from GF1/InterWave chip 3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 4 * 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 * 20 */ 21 22#include <sound/core.h> 23#include <sound/info.h> 24#include <sound/gus.h> 25 26#ifdef CONFIG_SND_DEBUG 27#define STAT_ADD(x) ((x)++) 28#else 29#define STAT_ADD(x) while (0) { ; } 30#endif 31 32irqreturn_t snd_gus_interrupt(int irq, void *dev_id) 33{ 34 struct snd_gus_card * gus = dev_id; 35 unsigned char status; 36 int loop = 100; 37 int handled = 0; 38 39__again: 40 status = inb(gus->gf1.reg_irqstat); 41 if (status == 0) 42 return IRQ_RETVAL(handled); 43 handled = 1; 44 /* snd_printk(KERN_DEBUG "IRQ: status = 0x%x\n", status); */ 45 if (status & 0x02) { 46 STAT_ADD(gus->gf1.interrupt_stat_midi_in); 47 if (gus->gf1.interrupt_handler_midi_in) 48 gus->gf1.interrupt_handler_midi_in(gus); 49 } 50 if (status & 0x01) { 51 STAT_ADD(gus->gf1.interrupt_stat_midi_out); 52 if (gus->gf1.interrupt_handler_midi_out) 53 gus->gf1.interrupt_handler_midi_out(gus); 54 } 55 if (status & (0x20 | 0x40)) { 56 unsigned int already, _current_; 57 unsigned char voice_status, voice; 58 struct snd_gus_voice *pvoice; 59 60 already = 0; 61 while (((voice_status = snd_gf1_i_read8(gus, SNDRV_GF1_GB_VOICES_IRQ)) & 0xc0) != 0xc0) { 62 voice = voice_status & 0x1f; 63 _current_ = 1 << voice; 64 if (already & _current_) 65 continue; /* multi request */ 66 already |= _current_; /* mark request */ 67 pvoice = &gus->gf1.voices[voice]; 68 if (pvoice->use) { 69 if (!(voice_status & 0x80)) { /* voice position IRQ */ 70 STAT_ADD(pvoice->interrupt_stat_wave); 71 pvoice->handler_wave(gus, pvoice); 72 } 73 if (!(voice_status & 0x40)) { /* volume ramp IRQ */ 74 STAT_ADD(pvoice->interrupt_stat_volume); 75 pvoice->handler_volume(gus, pvoice); 76 } 77 } else { 78 STAT_ADD(gus->gf1.interrupt_stat_voice_lost); 79 snd_gf1_i_ctrl_stop(gus, SNDRV_GF1_VB_ADDRESS_CONTROL); 80 snd_gf1_i_ctrl_stop(gus, SNDRV_GF1_VB_VOLUME_CONTROL); 81 } 82 } 83 } 84 if (status & 0x04) { 85 STAT_ADD(gus->gf1.interrupt_stat_timer1); 86 if (gus->gf1.interrupt_handler_timer1) 87 gus->gf1.interrupt_handler_timer1(gus); 88 } 89 if (status & 0x08) { 90 STAT_ADD(gus->gf1.interrupt_stat_timer2); 91 if (gus->gf1.interrupt_handler_timer2) 92 gus->gf1.interrupt_handler_timer2(gus); 93 } 94 if (status & 0x80) { 95 if (snd_gf1_i_look8(gus, SNDRV_GF1_GB_DRAM_DMA_CONTROL) & 0x40) { 96 STAT_ADD(gus->gf1.interrupt_stat_dma_write); 97 if (gus->gf1.interrupt_handler_dma_write) 98 gus->gf1.interrupt_handler_dma_write(gus); 99 } 100 if (snd_gf1_i_look8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL) & 0x40) { 101 STAT_ADD(gus->gf1.interrupt_stat_dma_read); 102 if (gus->gf1.interrupt_handler_dma_read) 103 gus->gf1.interrupt_handler_dma_read(gus); 104 } 105 } 106 if (--loop > 0) 107 goto __again; 108 return IRQ_NONE; 109} 110 111#ifdef CONFIG_SND_DEBUG 112static void snd_gus_irq_info_read(struct snd_info_entry *entry, 113 struct snd_info_buffer *buffer) 114{ 115 struct snd_gus_card *gus; 116 struct snd_gus_voice *pvoice; 117 int idx; 118 119 gus = entry->private_data; 120 snd_iprintf(buffer, "midi out = %u\n", gus->gf1.interrupt_stat_midi_out); 121 snd_iprintf(buffer, "midi in = %u\n", gus->gf1.interrupt_stat_midi_in); 122 snd_iprintf(buffer, "timer1 = %u\n", gus->gf1.interrupt_stat_timer1); 123 snd_iprintf(buffer, "timer2 = %u\n", gus->gf1.interrupt_stat_timer2); 124 snd_iprintf(buffer, "dma write = %u\n", gus->gf1.interrupt_stat_dma_write); 125 snd_iprintf(buffer, "dma read = %u\n", gus->gf1.interrupt_stat_dma_read); 126 snd_iprintf(buffer, "voice lost = %u\n", gus->gf1.interrupt_stat_voice_lost); 127 for (idx = 0; idx < 32; idx++) { 128 pvoice = &gus->gf1.voices[idx]; 129 snd_iprintf(buffer, "voice %i: wave = %u, volume = %u\n", 130 idx, 131 pvoice->interrupt_stat_wave, 132 pvoice->interrupt_stat_volume); 133 } 134} 135 136void snd_gus_irq_profile_init(struct snd_gus_card *gus) 137{ 138 struct snd_info_entry *entry; 139 140 if (! snd_card_proc_new(gus->card, "gusirq", &entry)) 141 snd_info_set_text_ops(entry, gus, snd_gus_irq_info_read); 142} 143 144#endif 145