1/* 2 * Routine for IRQ handling from GF1/InterWave chip 3 * Copyright (c) by Jaroslav Kysela <perex@suse.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/driver.h> 23#include <sound/core.h> 24#include <sound/info.h> 25#include <sound/gus.h> 26 27#ifdef CONFIG_SND_DEBUG 28#define STAT_ADD(x) ((x)++) 29#else 30#define STAT_ADD(x) while (0) { ; } 31#endif 32 33irqreturn_t snd_gus_interrupt(int irq, void *dev_id) 34{ 35 struct snd_gus_card * gus = dev_id; 36 unsigned char status; 37 int loop = 100; 38 int handled = 0; 39 40__again: 41 status = inb(gus->gf1.reg_irqstat); 42 if (status == 0) 43 return IRQ_RETVAL(handled); 44 handled = 1; 45 // snd_printk("IRQ: status = 0x%x\n", status); 46 if (status & 0x02) { 47 STAT_ADD(gus->gf1.interrupt_stat_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 gus->gf1.interrupt_handler_midi_out(gus); 53 } 54 if (status & (0x20 | 0x40)) { 55 unsigned int already, _current_; 56 unsigned char voice_status, voice; 57 struct snd_gus_voice *pvoice; 58 59 already = 0; 60 while (((voice_status = snd_gf1_i_read8(gus, SNDRV_GF1_GB_VOICES_IRQ)) & 0xc0) != 0xc0) { 61 voice = voice_status & 0x1f; 62 _current_ = 1 << voice; 63 if (already & _current_) 64 continue; /* multi request */ 65 already |= _current_; /* mark request */ 66 pvoice = &gus->gf1.voices[voice]; 67 if (pvoice->use) { 68 if (!(voice_status & 0x80)) { /* voice position IRQ */ 69 STAT_ADD(pvoice->interrupt_stat_wave); 70 pvoice->handler_wave(gus, pvoice); 71 } 72 if (!(voice_status & 0x40)) { /* volume ramp IRQ */ 73 STAT_ADD(pvoice->interrupt_stat_volume); 74 pvoice->handler_volume(gus, pvoice); 75 } 76 } else { 77 STAT_ADD(gus->gf1.interrupt_stat_voice_lost); 78 snd_gf1_i_ctrl_stop(gus, SNDRV_GF1_VB_ADDRESS_CONTROL); 79 snd_gf1_i_ctrl_stop(gus, SNDRV_GF1_VB_VOLUME_CONTROL); 80 } 81 } 82 } 83 if (status & 0x04) { 84 STAT_ADD(gus->gf1.interrupt_stat_timer1); 85 gus->gf1.interrupt_handler_timer1(gus); 86 } 87 if (status & 0x08) { 88 STAT_ADD(gus->gf1.interrupt_stat_timer2); 89 gus->gf1.interrupt_handler_timer2(gus); 90 } 91 if (status & 0x80) { 92 if (snd_gf1_i_look8(gus, SNDRV_GF1_GB_DRAM_DMA_CONTROL) & 0x40) { 93 STAT_ADD(gus->gf1.interrupt_stat_dma_write); 94 gus->gf1.interrupt_handler_dma_write(gus); 95 } 96 if (snd_gf1_i_look8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL) & 0x40) { 97 STAT_ADD(gus->gf1.interrupt_stat_dma_read); 98 gus->gf1.interrupt_handler_dma_read(gus); 99 } 100 } 101 if (--loop > 0) 102 goto __again; 103 return IRQ_NONE; 104} 105 106#ifdef CONFIG_SND_DEBUG 107static void snd_gus_irq_info_read(struct snd_info_entry *entry, 108 struct snd_info_buffer *buffer) 109{ 110 struct snd_gus_card *gus; 111 struct snd_gus_voice *pvoice; 112 int idx; 113 114 gus = entry->private_data; 115 snd_iprintf(buffer, "midi out = %u\n", gus->gf1.interrupt_stat_midi_out); 116 snd_iprintf(buffer, "midi in = %u\n", gus->gf1.interrupt_stat_midi_in); 117 snd_iprintf(buffer, "timer1 = %u\n", gus->gf1.interrupt_stat_timer1); 118 snd_iprintf(buffer, "timer2 = %u\n", gus->gf1.interrupt_stat_timer2); 119 snd_iprintf(buffer, "dma write = %u\n", gus->gf1.interrupt_stat_dma_write); 120 snd_iprintf(buffer, "dma read = %u\n", gus->gf1.interrupt_stat_dma_read); 121 snd_iprintf(buffer, "voice lost = %u\n", gus->gf1.interrupt_stat_voice_lost); 122 for (idx = 0; idx < 32; idx++) { 123 pvoice = &gus->gf1.voices[idx]; 124 snd_iprintf(buffer, "voice %i: wave = %u, volume = %u\n", 125 idx, 126 pvoice->interrupt_stat_wave, 127 pvoice->interrupt_stat_volume); 128 } 129} 130 131void snd_gus_irq_profile_init(struct snd_gus_card *gus) 132{ 133 struct snd_info_entry *entry; 134 135 if (! snd_card_proc_new(gus->card, "gusirq", &entry)) 136 snd_info_set_text_ops(entry, gus, snd_gus_irq_info_read); 137} 138 139#endif 140