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