1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 4 * Creative Labs, Inc. 5 * Routines for IRQ control of EMU10K1 chips 6 * 7 * BUGS: 8 * -- 9 * 10 * TODO: 11 * -- 12 */ 13 14 #include <linux/time.h> 15 #include <sound/core.h> 16 #include <sound/emu10k1.h> 17 18 irqreturn_t snd_emu10k1_interrupt(int irq, void *dev_id) 19 { 20 struct snd_emu10k1 *emu = dev_id; 21 unsigned int status, orig_status; 22 int handled = 0; 23 int timeout = 0; 24 25 while ((status = inl(emu->port + IPR)) != 0) { 26 handled = 1; 27 if ((status & 0xffffffff) == 0xffffffff) { 28 dev_info(emu->card->dev, 29 "Suspected sound card removal\n"); 30 break; 31 } 32 if (++timeout == 1000) { 33 dev_info(emu->card->dev, "emu10k1 irq routine failure\n"); 34 break; 35 } 36 orig_status = status; 37 if (status & IPR_PCIERROR) { 38 dev_err(emu->card->dev, "interrupt: PCI error\n"); 39 snd_emu10k1_intr_disable(emu, INTE_PCIERRORENABLE); 40 status &= ~IPR_PCIERROR; 41 } 42 if (status & (IPR_VOLINCR|IPR_VOLDECR|IPR_MUTE)) { 43 if (emu->hwvol_interrupt) 44 emu->hwvol_interrupt(emu, status); 45 else 46 snd_emu10k1_intr_disable(emu, INTE_VOLINCRENABLE|INTE_VOLDECRENABLE|INTE_MUTEENABLE); 47 status &= ~(IPR_VOLINCR|IPR_VOLDECR|IPR_MUTE); 48 } 49 if (status & IPR_CHANNELLOOP) { 50 int voice; 51 int voice_max = status & IPR_CHANNELNUMBERMASK; 52 u32 val; 53 struct snd_emu10k1_voice *pvoice = emu->voices; 54 55 val = snd_emu10k1_ptr_read(emu, CLIPL, 0); 56 for (voice = 0; voice <= voice_max; voice++) { 57 if (voice == 0x20) 58 val = snd_emu10k1_ptr_read(emu, CLIPH, 0); 59 if (val & 1) { 60 if (pvoice->use && pvoice->interrupt != NULL) { 61 pvoice->interrupt(emu, pvoice); 62 snd_emu10k1_voice_intr_ack(emu, voice); 63 } else { 64 snd_emu10k1_voice_intr_disable(emu, voice); 65 } 66 } 67 val >>= 1; 68 pvoice++; 69 } 70 val = snd_emu10k1_ptr_read(emu, HLIPL, 0); 71 for (voice = 0; voice <= voice_max; voice++) { 72 if (voice == 0x20) 73 val = snd_emu10k1_ptr_read(emu, HLIPH, 0); 74 if (val & 1) { 75 if (pvoice->use && pvoice->interrupt != NULL) { 76 pvoice->interrupt(emu, pvoice); 77 snd_emu10k1_voice_half_loop_intr_ack(emu, voice); 78 } else { 79 snd_emu10k1_voice_half_loop_intr_disable(emu, voice); 80 } 81 } 82 val >>= 1; 83 pvoice++; 84 } 85 status &= ~(IPR_CHANNELLOOP | IPR_CHANNELNUMBERMASK); 86 } 87 if (status & (IPR_ADCBUFFULL|IPR_ADCBUFHALFFULL)) { 88 if (emu->capture_interrupt) 89 emu->capture_interrupt(emu, status); 90 else 91 snd_emu10k1_intr_disable(emu, INTE_ADCBUFENABLE); 92 status &= ~(IPR_ADCBUFFULL|IPR_ADCBUFHALFFULL); 93 } 94 if (status & (IPR_MICBUFFULL|IPR_MICBUFHALFFULL)) { 95 if (emu->capture_mic_interrupt) 96 emu->capture_mic_interrupt(emu, status); 97 else 98 snd_emu10k1_intr_disable(emu, INTE_MICBUFENABLE); 99 status &= ~(IPR_MICBUFFULL|IPR_MICBUFHALFFULL); 100 } 101 if (status & (IPR_EFXBUFFULL|IPR_EFXBUFHALFFULL)) { 102 if (emu->capture_efx_interrupt) 103 emu->capture_efx_interrupt(emu, status); 104 else 105 snd_emu10k1_intr_disable(emu, INTE_EFXBUFENABLE); 106 status &= ~(IPR_EFXBUFFULL|IPR_EFXBUFHALFFULL); 107 } 108 if (status & (IPR_MIDITRANSBUFEMPTY|IPR_MIDIRECVBUFEMPTY)) { 109 if (emu->midi.interrupt) 110 emu->midi.interrupt(emu, status); 111 else 112 snd_emu10k1_intr_disable(emu, INTE_MIDITXENABLE|INTE_MIDIRXENABLE); 113 status &= ~(IPR_MIDITRANSBUFEMPTY|IPR_MIDIRECVBUFEMPTY); 114 } 115 if (status & (IPR_A_MIDITRANSBUFEMPTY2|IPR_A_MIDIRECVBUFEMPTY2)) { 116 if (emu->midi2.interrupt) 117 emu->midi2.interrupt(emu, status); 118 else 119 snd_emu10k1_intr_disable(emu, INTE_A_MIDITXENABLE2|INTE_A_MIDIRXENABLE2); 120 status &= ~(IPR_A_MIDITRANSBUFEMPTY2|IPR_A_MIDIRECVBUFEMPTY2); 121 } 122 if (status & IPR_INTERVALTIMER) { 123 if (emu->timer) 124 snd_timer_interrupt(emu->timer, emu->timer->sticks); 125 else 126 snd_emu10k1_intr_disable(emu, INTE_INTERVALTIMERENB); 127 status &= ~IPR_INTERVALTIMER; 128 } 129 if (status & (IPR_GPSPDIFSTATUSCHANGE|IPR_CDROMSTATUSCHANGE)) { 130 if (emu->spdif_interrupt) 131 emu->spdif_interrupt(emu, status); 132 else 133 snd_emu10k1_intr_disable(emu, INTE_GPSPDIFENABLE|INTE_CDSPDIFENABLE); 134 status &= ~(IPR_GPSPDIFSTATUSCHANGE|IPR_CDROMSTATUSCHANGE); 135 } 136 if (status & IPR_FXDSP) { 137 if (emu->dsp_interrupt) 138 emu->dsp_interrupt(emu); 139 else 140 snd_emu10k1_intr_disable(emu, INTE_FXDSPENABLE); 141 status &= ~IPR_FXDSP; 142 } 143 if (status & IPR_P16V) { 144 if (emu->p16v_interrupt) 145 emu->p16v_interrupt(emu); 146 else 147 outl(0, emu->port + INTE2); 148 status &= ~IPR_P16V; 149 } 150 151 if (status) { 152 dev_err(emu->card->dev, 153 "unhandled interrupt: 0x%08x\n", status); 154 } 155 outl(orig_status, emu->port + IPR); /* ack all */ 156 } 157 158 return IRQ_RETVAL(handled); 159 } 160