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 if (status & 0x02) { 30 STAT_ADD(gus->gf1.interrupt_stat_midi_in); 31 if (gus->gf1.interrupt_handler_midi_in) 32 gus->gf1.interrupt_handler_midi_in(gus); 33 } 34 if (status & 0x01) { 35 STAT_ADD(gus->gf1.interrupt_stat_midi_out); 36 if (gus->gf1.interrupt_handler_midi_out) 37 gus->gf1.interrupt_handler_midi_out(gus); 38 } 39 if (status & (0x20 | 0x40)) { 40 unsigned int already, _current_; 41 unsigned char voice_status, voice; 42 struct snd_gus_voice *pvoice; 43 44 already = 0; 45 while (((voice_status = snd_gf1_i_read8(gus, SNDRV_GF1_GB_VOICES_IRQ)) & 0xc0) != 0xc0) { 46 voice = voice_status & 0x1f; 47 _current_ = 1 << voice; 48 if (already & _current_) 49 continue; /* multi request */ 50 already |= _current_; /* mark request */ 51 #if 0 52 dev_dbg(gus->card->dev, 53 "voice = %i, voice_status = 0x%x, voice_verify = %i\n", 54 voice, voice_status, inb(GUSP(gus, GF1PAGE))); 55 #endif 56 pvoice = &gus->gf1.voices[voice]; 57 if (pvoice->use) { 58 if (!(voice_status & 0x80)) { /* voice position IRQ */ 59 STAT_ADD(pvoice->interrupt_stat_wave); 60 pvoice->handler_wave(gus, pvoice); 61 } 62 if (!(voice_status & 0x40)) { /* volume ramp IRQ */ 63 STAT_ADD(pvoice->interrupt_stat_volume); 64 pvoice->handler_volume(gus, pvoice); 65 } 66 } else { 67 STAT_ADD(gus->gf1.interrupt_stat_voice_lost); 68 snd_gf1_i_ctrl_stop(gus, SNDRV_GF1_VB_ADDRESS_CONTROL); 69 snd_gf1_i_ctrl_stop(gus, SNDRV_GF1_VB_VOLUME_CONTROL); 70 } 71 } 72 } 73 if (status & 0x04) { 74 STAT_ADD(gus->gf1.interrupt_stat_timer1); 75 if (gus->gf1.interrupt_handler_timer1) 76 gus->gf1.interrupt_handler_timer1(gus); 77 } 78 if (status & 0x08) { 79 STAT_ADD(gus->gf1.interrupt_stat_timer2); 80 if (gus->gf1.interrupt_handler_timer2) 81 gus->gf1.interrupt_handler_timer2(gus); 82 } 83 if (status & 0x80) { 84 if (snd_gf1_i_look8(gus, SNDRV_GF1_GB_DRAM_DMA_CONTROL) & 0x40) { 85 STAT_ADD(gus->gf1.interrupt_stat_dma_write); 86 if (gus->gf1.interrupt_handler_dma_write) 87 gus->gf1.interrupt_handler_dma_write(gus); 88 } 89 if (snd_gf1_i_look8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL) & 0x40) { 90 STAT_ADD(gus->gf1.interrupt_stat_dma_read); 91 if (gus->gf1.interrupt_handler_dma_read) 92 gus->gf1.interrupt_handler_dma_read(gus); 93 } 94 } 95 if (--loop > 0) 96 goto __again; 97 return IRQ_NONE; 98 } 99 100 #ifdef CONFIG_SND_DEBUG 101 static void snd_gus_irq_info_read(struct snd_info_entry *entry, 102 struct snd_info_buffer *buffer) 103 { 104 struct snd_gus_card *gus; 105 struct snd_gus_voice *pvoice; 106 int idx; 107 108 gus = entry->private_data; 109 snd_iprintf(buffer, "midi out = %u\n", gus->gf1.interrupt_stat_midi_out); 110 snd_iprintf(buffer, "midi in = %u\n", gus->gf1.interrupt_stat_midi_in); 111 snd_iprintf(buffer, "timer1 = %u\n", gus->gf1.interrupt_stat_timer1); 112 snd_iprintf(buffer, "timer2 = %u\n", gus->gf1.interrupt_stat_timer2); 113 snd_iprintf(buffer, "dma write = %u\n", gus->gf1.interrupt_stat_dma_write); 114 snd_iprintf(buffer, "dma read = %u\n", gus->gf1.interrupt_stat_dma_read); 115 snd_iprintf(buffer, "voice lost = %u\n", gus->gf1.interrupt_stat_voice_lost); 116 for (idx = 0; idx < 32; idx++) { 117 pvoice = &gus->gf1.voices[idx]; 118 snd_iprintf(buffer, "voice %i: wave = %u, volume = %u\n", 119 idx, 120 pvoice->interrupt_stat_wave, 121 pvoice->interrupt_stat_volume); 122 } 123 } 124 125 void snd_gus_irq_profile_init(struct snd_gus_card *gus) 126 { 127 snd_card_ro_proc_new(gus->card, "gusirq", gus, snd_gus_irq_info_read); 128 } 129 130 #endif 131