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 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 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 #if 0 67 printk("voice = %i, voice_status = 0x%x, voice_verify = %i\n", voice, voice_status, inb(GUSP(gus, GF1PAGE))); 68 #endif 69 pvoice = &gus->gf1.voices[voice]; 70 if (pvoice->use) { 71 if (!(voice_status & 0x80)) { /* voice position IRQ */ 72 STAT_ADD(pvoice->interrupt_stat_wave); 73 pvoice->handler_wave(gus, pvoice); 74 } 75 if (!(voice_status & 0x40)) { /* volume ramp IRQ */ 76 STAT_ADD(pvoice->interrupt_stat_volume); 77 pvoice->handler_volume(gus, pvoice); 78 } 79 } else { 80 STAT_ADD(gus->gf1.interrupt_stat_voice_lost); 81 snd_gf1_i_ctrl_stop(gus, SNDRV_GF1_VB_ADDRESS_CONTROL); 82 snd_gf1_i_ctrl_stop(gus, SNDRV_GF1_VB_VOLUME_CONTROL); 83 } 84 } 85 } 86 if (status & 0x04) { 87 STAT_ADD(gus->gf1.interrupt_stat_timer1); 88 gus->gf1.interrupt_handler_timer1(gus); 89 } 90 if (status & 0x08) { 91 STAT_ADD(gus->gf1.interrupt_stat_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 gus->gf1.interrupt_handler_dma_write(gus); 98 } 99 if (snd_gf1_i_look8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL) & 0x40) { 100 STAT_ADD(gus->gf1.interrupt_stat_dma_read); 101 gus->gf1.interrupt_handler_dma_read(gus); 102 } 103 } 104 if (--loop > 0) 105 goto __again; 106 return IRQ_NONE; 107 } 108 109 #ifdef CONFIG_SND_DEBUG 110 static void snd_gus_irq_info_read(struct snd_info_entry *entry, 111 struct snd_info_buffer *buffer) 112 { 113 struct snd_gus_card *gus; 114 struct snd_gus_voice *pvoice; 115 int idx; 116 117 gus = entry->private_data; 118 snd_iprintf(buffer, "midi out = %u\n", gus->gf1.interrupt_stat_midi_out); 119 snd_iprintf(buffer, "midi in = %u\n", gus->gf1.interrupt_stat_midi_in); 120 snd_iprintf(buffer, "timer1 = %u\n", gus->gf1.interrupt_stat_timer1); 121 snd_iprintf(buffer, "timer2 = %u\n", gus->gf1.interrupt_stat_timer2); 122 snd_iprintf(buffer, "dma write = %u\n", gus->gf1.interrupt_stat_dma_write); 123 snd_iprintf(buffer, "dma read = %u\n", gus->gf1.interrupt_stat_dma_read); 124 snd_iprintf(buffer, "voice lost = %u\n", gus->gf1.interrupt_stat_voice_lost); 125 for (idx = 0; idx < 32; idx++) { 126 pvoice = &gus->gf1.voices[idx]; 127 snd_iprintf(buffer, "voice %i: wave = %u, volume = %u\n", 128 idx, 129 pvoice->interrupt_stat_wave, 130 pvoice->interrupt_stat_volume); 131 } 132 } 133 134 void snd_gus_irq_profile_init(struct snd_gus_card *gus) 135 { 136 struct snd_info_entry *entry; 137 138 if (! snd_card_proc_new(gus->card, "gusirq", &entry)) 139 snd_info_set_text_ops(entry, gus, snd_gus_irq_info_read); 140 } 141 142 #endif 143