1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
5 * Routines for IRQ control of EMU10K1 chips
14 #include <linux/time.h>
15 #include <sound/core.h>
16 #include <sound/emu10k1.h>
18 irqreturn_t snd_emu10k1_interrupt(int irq, void *dev_id)
20 struct snd_emu10k1 *emu = dev_id;
21 unsigned int status, status2, orig_status, orig_status2;
25 while (((status = inl(emu->port + IPR)) != 0) && (timeout < 1000)) {
29 if ((status & 0xffffffff) == 0xffffffff) {
30 dev_info(emu->card->dev,
31 "Suspected sound card removal\n");
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;
39 if (status & (IPR_VOLINCR|IPR_VOLDECR|IPR_MUTE)) {
40 if (emu->hwvol_interrupt)
41 emu->hwvol_interrupt(emu, status);
43 snd_emu10k1_intr_disable(emu, INTE_VOLINCRENABLE|INTE_VOLDECRENABLE|INTE_MUTEENABLE);
44 status &= ~(IPR_VOLINCR|IPR_VOLDECR|IPR_MUTE);
46 if (status & IPR_CHANNELLOOP) {
48 int voice_max = status & IPR_CHANNELNUMBERMASK;
50 struct snd_emu10k1_voice *pvoice = emu->voices;
52 val = snd_emu10k1_ptr_read(emu, CLIPL, 0);
53 for (voice = 0; voice <= voice_max; voice++) {
55 val = snd_emu10k1_ptr_read(emu, CLIPH, 0);
57 if (pvoice->use && pvoice->interrupt != NULL) {
58 pvoice->interrupt(emu, pvoice);
59 snd_emu10k1_voice_intr_ack(emu, voice);
61 snd_emu10k1_voice_intr_disable(emu, voice);
67 val = snd_emu10k1_ptr_read(emu, HLIPL, 0);
68 for (voice = 0; voice <= voice_max; voice++) {
70 val = snd_emu10k1_ptr_read(emu, HLIPH, 0);
72 if (pvoice->use && pvoice->interrupt != NULL) {
73 pvoice->interrupt(emu, pvoice);
74 snd_emu10k1_voice_half_loop_intr_ack(emu, voice);
76 snd_emu10k1_voice_half_loop_intr_disable(emu, voice);
82 status &= ~IPR_CHANNELLOOP;
84 status &= ~IPR_CHANNELNUMBERMASK;
85 if (status & (IPR_ADCBUFFULL|IPR_ADCBUFHALFFULL)) {
86 if (emu->capture_interrupt)
87 emu->capture_interrupt(emu, status);
89 snd_emu10k1_intr_disable(emu, INTE_ADCBUFENABLE);
90 status &= ~(IPR_ADCBUFFULL|IPR_ADCBUFHALFFULL);
92 if (status & (IPR_MICBUFFULL|IPR_MICBUFHALFFULL)) {
93 if (emu->capture_mic_interrupt)
94 emu->capture_mic_interrupt(emu, status);
96 snd_emu10k1_intr_disable(emu, INTE_MICBUFENABLE);
97 status &= ~(IPR_MICBUFFULL|IPR_MICBUFHALFFULL);
99 if (status & (IPR_EFXBUFFULL|IPR_EFXBUFHALFFULL)) {
100 if (emu->capture_efx_interrupt)
101 emu->capture_efx_interrupt(emu, status);
103 snd_emu10k1_intr_disable(emu, INTE_EFXBUFENABLE);
104 status &= ~(IPR_EFXBUFFULL|IPR_EFXBUFHALFFULL);
106 if (status & (IPR_MIDITRANSBUFEMPTY|IPR_MIDIRECVBUFEMPTY)) {
107 if (emu->midi.interrupt)
108 emu->midi.interrupt(emu, status);
110 snd_emu10k1_intr_disable(emu, INTE_MIDITXENABLE|INTE_MIDIRXENABLE);
111 status &= ~(IPR_MIDITRANSBUFEMPTY|IPR_MIDIRECVBUFEMPTY);
113 if (status & (IPR_A_MIDITRANSBUFEMPTY2|IPR_A_MIDIRECVBUFEMPTY2)) {
114 if (emu->midi2.interrupt)
115 emu->midi2.interrupt(emu, status);
117 snd_emu10k1_intr_disable(emu, INTE_A_MIDITXENABLE2|INTE_A_MIDIRXENABLE2);
118 status &= ~(IPR_A_MIDITRANSBUFEMPTY2|IPR_A_MIDIRECVBUFEMPTY2);
120 if (status & IPR_INTERVALTIMER) {
122 snd_timer_interrupt(emu->timer, emu->timer->sticks);
124 snd_emu10k1_intr_disable(emu, INTE_INTERVALTIMERENB);
125 status &= ~IPR_INTERVALTIMER;
127 if (status & (IPR_GPSPDIFSTATUSCHANGE|IPR_CDROMSTATUSCHANGE)) {
128 if (emu->spdif_interrupt)
129 emu->spdif_interrupt(emu, status);
131 snd_emu10k1_intr_disable(emu, INTE_GPSPDIFENABLE|INTE_CDSPDIFENABLE);
132 status &= ~(IPR_GPSPDIFSTATUSCHANGE|IPR_CDROMSTATUSCHANGE);
134 if (status & IPR_FXDSP) {
135 if (emu->dsp_interrupt)
136 emu->dsp_interrupt(emu);
138 snd_emu10k1_intr_disable(emu, INTE_FXDSPENABLE);
139 status &= ~IPR_FXDSP;
141 if (status & IPR_P16V) {
142 while ((status2 = inl(emu->port + IPR2)) != 0) {
143 u32 mask = INTE2_PLAYBACK_CH_0_LOOP; /* Full Loop */
144 struct snd_emu10k1_voice *pvoice = &(emu->p16v_voices[0]);
145 struct snd_emu10k1_voice *cvoice = &(emu->p16v_capture_voice);
147 /* dev_dbg(emu->card->dev, "status2=0x%x\n", status2); */
148 orig_status2 = status2;
151 snd_pcm_period_elapsed(pvoice->epcm->substream);
153 dev_err(emu->card->dev,
154 "p16v: status: 0x%08x, mask=0x%08x, pvoice=%p, use=%d\n",
155 status2, mask, pvoice,
159 if(status2 & 0x110000) {
160 /* dev_info(emu->card->dev, "capture int found\n"); */
162 /* dev_info(emu->card->dev, "capture period_elapsed\n"); */
163 snd_pcm_period_elapsed(cvoice->epcm->substream);
166 outl(orig_status2, emu->port + IPR2); /* ack all */
173 dev_err(emu->card->dev,
174 "unhandled interrupt: 0x%08x\n", status);
175 //make sure any interrupts we don't handle are disabled:
176 bits = INTE_FXDSPENABLE |
177 INTE_PCIERRORENABLE |
186 INTE_INTERVALTIMERENB |
190 bits |= INTE_A_MIDITXENABLE2 | INTE_A_MIDIRXENABLE2;
191 snd_emu10k1_intr_disable(emu, bits);
193 outl(orig_status, emu->port + IPR); /* ack all */
196 dev_info(emu->card->dev, "emu10k1 irq routine failure\n");
198 return IRQ_RETVAL(handled);