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/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 33 irqreturn_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 if (gus->gf1.interrupt_handler_midi_in) 49 gus->gf1.interrupt_handler_midi_in(gus); 50 } 51 if (status & 0x01) { 52 STAT_ADD(gus->gf1.interrupt_stat_midi_out); 53 if (gus->gf1.interrupt_handler_midi_out) 54 gus->gf1.interrupt_handler_midi_out(gus); 55 } 56 if (status & (0x20 | 0x40)) { 57 unsigned int already, _current_; 58 unsigned char voice_status, voice; 59 struct snd_gus_voice *pvoice; 60 61 already = 0; 62 while (((voice_status = snd_gf1_i_read8(gus, SNDRV_GF1_GB_VOICES_IRQ)) & 0xc0) != 0xc0) { 63 voice = voice_status & 0x1f; 64 _current_ = 1 << voice; 65 if (already & _current_) 66 continue; /* multi request */ 67 already |= _current_; /* mark request */ 68 #if 0 69 printk("voice = %i, voice_status = 0x%x, voice_verify = %i\n", voice, voice_status, inb(GUSP(gus, GF1PAGE))); 70 #endif 71 pvoice = &gus->gf1.voices[voice]; 72 if (pvoice->use) { 73 if (!(voice_status & 0x80)) { /* voice position IRQ */ 74 STAT_ADD(pvoice->interrupt_stat_wave); 75 pvoice->handler_wave(gus, pvoice); 76 } 77 if (!(voice_status & 0x40)) { /* volume ramp IRQ */ 78 STAT_ADD(pvoice->interrupt_stat_volume); 79 pvoice->handler_volume(gus, pvoice); 80 } 81 } else { 82 STAT_ADD(gus->gf1.interrupt_stat_voice_lost); 83 snd_gf1_i_ctrl_stop(gus, SNDRV_GF1_VB_ADDRESS_CONTROL); 84 snd_gf1_i_ctrl_stop(gus, SNDRV_GF1_VB_VOLUME_CONTROL); 85 } 86 } 87 } 88 if (status & 0x04) { 89 STAT_ADD(gus->gf1.interrupt_stat_timer1); 90 if (gus->gf1.interrupt_handler_timer1) 91 gus->gf1.interrupt_handler_timer1(gus); 92 } 93 if (status & 0x08) { 94 STAT_ADD(gus->gf1.interrupt_stat_timer2); 95 if (gus->gf1.interrupt_handler_timer2) 96 gus->gf1.interrupt_handler_timer2(gus); 97 } 98 if (status & 0x80) { 99 if (snd_gf1_i_look8(gus, SNDRV_GF1_GB_DRAM_DMA_CONTROL) & 0x40) { 100 STAT_ADD(gus->gf1.interrupt_stat_dma_write); 101 if (gus->gf1.interrupt_handler_dma_write) 102 gus->gf1.interrupt_handler_dma_write(gus); 103 } 104 if (snd_gf1_i_look8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL) & 0x40) { 105 STAT_ADD(gus->gf1.interrupt_stat_dma_read); 106 if (gus->gf1.interrupt_handler_dma_read) 107 gus->gf1.interrupt_handler_dma_read(gus); 108 } 109 } 110 if (--loop > 0) 111 goto __again; 112 return IRQ_NONE; 113 } 114 115 #ifdef CONFIG_SND_DEBUG 116 static void snd_gus_irq_info_read(struct snd_info_entry *entry, 117 struct snd_info_buffer *buffer) 118 { 119 struct snd_gus_card *gus; 120 struct snd_gus_voice *pvoice; 121 int idx; 122 123 gus = entry->private_data; 124 snd_iprintf(buffer, "midi out = %u\n", gus->gf1.interrupt_stat_midi_out); 125 snd_iprintf(buffer, "midi in = %u\n", gus->gf1.interrupt_stat_midi_in); 126 snd_iprintf(buffer, "timer1 = %u\n", gus->gf1.interrupt_stat_timer1); 127 snd_iprintf(buffer, "timer2 = %u\n", gus->gf1.interrupt_stat_timer2); 128 snd_iprintf(buffer, "dma write = %u\n", gus->gf1.interrupt_stat_dma_write); 129 snd_iprintf(buffer, "dma read = %u\n", gus->gf1.interrupt_stat_dma_read); 130 snd_iprintf(buffer, "voice lost = %u\n", gus->gf1.interrupt_stat_voice_lost); 131 for (idx = 0; idx < 32; idx++) { 132 pvoice = &gus->gf1.voices[idx]; 133 snd_iprintf(buffer, "voice %i: wave = %u, volume = %u\n", 134 idx, 135 pvoice->interrupt_stat_wave, 136 pvoice->interrupt_stat_volume); 137 } 138 } 139 140 void snd_gus_irq_profile_init(struct snd_gus_card *gus) 141 { 142 struct snd_info_entry *entry; 143 144 if (! snd_card_proc_new(gus->card, "gusirq", &entry)) 145 snd_info_set_text_ops(entry, gus, snd_gus_irq_info_read); 146 } 147 148 #endif 149