1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Routine for IRQ handling from GF1/InterWave chip 4 * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 5 */ 6 7 #include <sound/core.h> 8 #include <sound/info.h> 9 #include <sound/gus.h> 10 11 #ifdef CONFIG_SND_DEBUG 12 #define STAT_ADD(x) ((x)++) 13 #else 14 #define STAT_ADD(x) while (0) { ; } 15 #endif 16 17 irqreturn_t snd_gus_interrupt(int irq, void *dev_id) 18 { 19 struct snd_gus_card * gus = dev_id; 20 unsigned char status; 21 int loop = 100; 22 int handled = 0; 23 24 __again: 25 status = inb(gus->gf1.reg_irqstat); 26 if (status == 0) 27 return IRQ_RETVAL(handled); 28 handled = 1; 29 /* snd_printk(KERN_DEBUG "IRQ: status = 0x%x\n", status); */ 30 if (status & 0x02) { 31 STAT_ADD(gus->gf1.interrupt_stat_midi_in); 32 if (gus->gf1.interrupt_handler_midi_in) 33 gus->gf1.interrupt_handler_midi_in(gus); 34 } 35 if (status & 0x01) { 36 STAT_ADD(gus->gf1.interrupt_stat_midi_out); 37 if (gus->gf1.interrupt_handler_midi_out) 38 gus->gf1.interrupt_handler_midi_out(gus); 39 } 40 if (status & (0x20 | 0x40)) { 41 unsigned int already, _current_; 42 unsigned char voice_status, voice; 43 struct snd_gus_voice *pvoice; 44 45 already = 0; 46 while (((voice_status = snd_gf1_i_read8(gus, SNDRV_GF1_GB_VOICES_IRQ)) & 0xc0) != 0xc0) { 47 voice = voice_status & 0x1f; 48 _current_ = 1 << voice; 49 if (already & _current_) 50 continue; /* multi request */ 51 already |= _current_; /* mark request */ 52 #if 0 53 printk(KERN_DEBUG "voice = %i, voice_status = 0x%x, " 54 "voice_verify = %i\n", 55 voice, voice_status, inb(GUSP(gus, GF1PAGE))); 56 #endif 57 pvoice = &gus->gf1.voices[voice]; 58 if (pvoice->use) { 59 if (!(voice_status & 0x80)) { /* voice position IRQ */ 60 STAT_ADD(pvoice->interrupt_stat_wave); 61 pvoice->handler_wave(gus, pvoice); 62 } 63 if (!(voice_status & 0x40)) { /* volume ramp IRQ */ 64 STAT_ADD(pvoice->interrupt_stat_volume); 65 pvoice->handler_volume(gus, pvoice); 66 } 67 } else { 68 STAT_ADD(gus->gf1.interrupt_stat_voice_lost); 69 snd_gf1_i_ctrl_stop(gus, SNDRV_GF1_VB_ADDRESS_CONTROL); 70 snd_gf1_i_ctrl_stop(gus, SNDRV_GF1_VB_VOLUME_CONTROL); 71 } 72 } 73 } 74 if (status & 0x04) { 75 STAT_ADD(gus->gf1.interrupt_stat_timer1); 76 if (gus->gf1.interrupt_handler_timer1) 77 gus->gf1.interrupt_handler_timer1(gus); 78 } 79 if (status & 0x08) { 80 STAT_ADD(gus->gf1.interrupt_stat_timer2); 81 if (gus->gf1.interrupt_handler_timer2) 82 gus->gf1.interrupt_handler_timer2(gus); 83 } 84 if (status & 0x80) { 85 if (snd_gf1_i_look8(gus, SNDRV_GF1_GB_DRAM_DMA_CONTROL) & 0x40) { 86 STAT_ADD(gus->gf1.interrupt_stat_dma_write); 87 if (gus->gf1.interrupt_handler_dma_write) 88 gus->gf1.interrupt_handler_dma_write(gus); 89 } 90 if (snd_gf1_i_look8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL) & 0x40) { 91 STAT_ADD(gus->gf1.interrupt_stat_dma_read); 92 if (gus->gf1.interrupt_handler_dma_read) 93 gus->gf1.interrupt_handler_dma_read(gus); 94 } 95 } 96 if (--loop > 0) 97 goto __again; 98 return IRQ_NONE; 99 } 100 101 #ifdef CONFIG_SND_DEBUG 102 static void snd_gus_irq_info_read(struct snd_info_entry *entry, 103 struct snd_info_buffer *buffer) 104 { 105 struct snd_gus_card *gus; 106 struct snd_gus_voice *pvoice; 107 int idx; 108 109 gus = entry->private_data; 110 snd_iprintf(buffer, "midi out = %u\n", gus->gf1.interrupt_stat_midi_out); 111 snd_iprintf(buffer, "midi in = %u\n", gus->gf1.interrupt_stat_midi_in); 112 snd_iprintf(buffer, "timer1 = %u\n", gus->gf1.interrupt_stat_timer1); 113 snd_iprintf(buffer, "timer2 = %u\n", gus->gf1.interrupt_stat_timer2); 114 snd_iprintf(buffer, "dma write = %u\n", gus->gf1.interrupt_stat_dma_write); 115 snd_iprintf(buffer, "dma read = %u\n", gus->gf1.interrupt_stat_dma_read); 116 snd_iprintf(buffer, "voice lost = %u\n", gus->gf1.interrupt_stat_voice_lost); 117 for (idx = 0; idx < 32; idx++) { 118 pvoice = &gus->gf1.voices[idx]; 119 snd_iprintf(buffer, "voice %i: wave = %u, volume = %u\n", 120 idx, 121 pvoice->interrupt_stat_wave, 122 pvoice->interrupt_stat_volume); 123 } 124 } 125 126 void snd_gus_irq_profile_init(struct snd_gus_card *gus) 127 { 128 snd_card_ro_proc_new(gus->card, "gusirq", gus, snd_gus_irq_info_read); 129 } 130 131 #endif 132