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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>4 * Creative Labs, Inc.5 * Routines for IRQ control of EMU10K1 chips6 */7 8#include <linux/time.h>9#include <sound/core.h>10#include <sound/emu10k1.h>11 12irqreturn_t snd_emu10k1_interrupt(int irq, void *dev_id)13{14 struct snd_emu10k1 *emu = dev_id;15 unsigned int status, orig_status;16 int handled = 0;17 int timeout = 0;18 19 while ((status = inl(emu->port + IPR)) != 0) {20 handled = 1;21 if ((status & 0xffffffff) == 0xffffffff) {22 dev_info(emu->card->dev,23 "Suspected sound card removal\n");24 break;25 }26 if (++timeout == 1000) {27 dev_info(emu->card->dev, "emu10k1 irq routine failure\n");28 break;29 }30 orig_status = status;31 if (status & IPR_PCIERROR) {32 dev_err(emu->card->dev, "interrupt: PCI error\n");33 snd_emu10k1_intr_disable(emu, INTE_PCIERRORENABLE);34 status &= ~IPR_PCIERROR;35 }36 if (status & (IPR_VOLINCR|IPR_VOLDECR|IPR_MUTE)) {37 if (emu->hwvol_interrupt)38 emu->hwvol_interrupt(emu, status);39 else40 snd_emu10k1_intr_disable(emu, INTE_VOLINCRENABLE|INTE_VOLDECRENABLE|INTE_MUTEENABLE);41 status &= ~(IPR_VOLINCR|IPR_VOLDECR|IPR_MUTE);42 }43 if (status & IPR_CHANNELLOOP) {44 struct snd_emu10k1_voice *pvoice;45 int voice;46 int voice_max = status & IPR_CHANNELNUMBERMASK;47 u32 val;48 49 val = snd_emu10k1_ptr_read(emu, CLIPL, 0);50 pvoice = emu->voices;51 for (voice = 0; voice <= voice_max; voice++) {52 if (voice == 0x20)53 val = snd_emu10k1_ptr_read(emu, CLIPH, 0);54 if (val & 1) {55 if (pvoice->use && pvoice->interrupt != NULL) {56 pvoice->interrupt(emu, pvoice);57 snd_emu10k1_voice_intr_ack(emu, voice);58 } else {59 snd_emu10k1_voice_intr_disable(emu, voice);60 }61 }62 val >>= 1;63 pvoice++;64 }65 val = snd_emu10k1_ptr_read(emu, HLIPL, 0);66 pvoice = emu->voices;67 for (voice = 0; voice <= voice_max; voice++) {68 if (voice == 0x20)69 val = snd_emu10k1_ptr_read(emu, HLIPH, 0);70 if (val & 1) {71 if (pvoice->use && pvoice->interrupt != NULL) {72 pvoice->interrupt(emu, pvoice);73 snd_emu10k1_voice_half_loop_intr_ack(emu, voice);74 } else {75 snd_emu10k1_voice_half_loop_intr_disable(emu, voice);76 }77 }78 val >>= 1;79 pvoice++;80 }81 status &= ~(IPR_CHANNELLOOP | IPR_CHANNELNUMBERMASK);82 }83 if (status & (IPR_ADCBUFFULL|IPR_ADCBUFHALFFULL)) {84 if (emu->capture_interrupt)85 emu->capture_interrupt(emu, status);86 else87 snd_emu10k1_intr_disable(emu, INTE_ADCBUFENABLE);88 status &= ~(IPR_ADCBUFFULL|IPR_ADCBUFHALFFULL);89 }90 if (status & (IPR_MICBUFFULL|IPR_MICBUFHALFFULL)) {91 if (emu->capture_mic_interrupt)92 emu->capture_mic_interrupt(emu, status);93 else94 snd_emu10k1_intr_disable(emu, INTE_MICBUFENABLE);95 status &= ~(IPR_MICBUFFULL|IPR_MICBUFHALFFULL);96 }97 if (status & (IPR_EFXBUFFULL|IPR_EFXBUFHALFFULL)) {98 if (emu->capture_efx_interrupt)99 emu->capture_efx_interrupt(emu, status);100 else101 snd_emu10k1_intr_disable(emu, INTE_EFXBUFENABLE);102 status &= ~(IPR_EFXBUFFULL|IPR_EFXBUFHALFFULL);103 }104 if (status & (IPR_MIDITRANSBUFEMPTY|IPR_MIDIRECVBUFEMPTY)) {105 if (emu->midi.interrupt)106 emu->midi.interrupt(emu, status);107 else108 snd_emu10k1_intr_disable(emu, INTE_MIDITXENABLE|INTE_MIDIRXENABLE);109 status &= ~(IPR_MIDITRANSBUFEMPTY|IPR_MIDIRECVBUFEMPTY);110 }111 if (status & (IPR_A_MIDITRANSBUFEMPTY2|IPR_A_MIDIRECVBUFEMPTY2)) {112 if (emu->midi2.interrupt)113 emu->midi2.interrupt(emu, status);114 else115 snd_emu10k1_intr_disable(emu, INTE_A_MIDITXENABLE2|INTE_A_MIDIRXENABLE2);116 status &= ~(IPR_A_MIDITRANSBUFEMPTY2|IPR_A_MIDIRECVBUFEMPTY2);117 }118 if (status & IPR_INTERVALTIMER) {119 if (emu->timer)120 snd_timer_interrupt(emu->timer, emu->timer->sticks);121 else122 snd_emu10k1_intr_disable(emu, INTE_INTERVALTIMERENB);123 status &= ~IPR_INTERVALTIMER;124 }125 if (status & (IPR_GPSPDIFSTATUSCHANGE|IPR_CDROMSTATUSCHANGE)) {126 if (emu->spdif_interrupt)127 emu->spdif_interrupt(emu, status);128 else129 snd_emu10k1_intr_disable(emu, INTE_GPSPDIFENABLE|INTE_CDSPDIFENABLE);130 status &= ~(IPR_GPSPDIFSTATUSCHANGE|IPR_CDROMSTATUSCHANGE);131 }132 if (status & IPR_FXDSP) {133 if (emu->dsp_interrupt)134 emu->dsp_interrupt(emu);135 else136 snd_emu10k1_intr_disable(emu, INTE_FXDSPENABLE);137 status &= ~IPR_FXDSP;138 }139 if (status & IPR_P16V) {140 if (emu->p16v_interrupt)141 emu->p16v_interrupt(emu);142 else143 outl(0, emu->port + INTE2);144 status &= ~IPR_P16V;145 }146 if (status & IPR_A_GPIO) {147 if (emu->gpio_interrupt)148 emu->gpio_interrupt(emu);149 else150 snd_emu10k1_intr_disable(emu, INTE_A_GPIOENABLE);151 status &= ~IPR_A_GPIO;152 }153 154 if (status) {155 dev_err(emu->card->dev,156 "unhandled interrupt: 0x%08x\n", status);157 }158 outl(orig_status, emu->port + IPR); /* ack all */159 }160 161 return IRQ_RETVAL(handled);162}163