1 /*
2 * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
3 * Creative Labs, Inc.
4 * Routines for IRQ control of EMU10K1 chips
5 *
6 * BUGS:
7 * --
8 *
9 * TODO:
10 * --
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 *
26 */
27
28 #include <sound/driver.h>
29 #include <linux/time.h>
30 #include <sound/core.h>
31 #include <sound/emu10k1.h>
32
33 irqreturn_t snd_emu10k1_interrupt(int irq, void *dev_id, struct pt_regs *regs)
34 {
35 emu10k1_t *emu = dev_id;
36 unsigned int status, orig_status;
37 int handled = 0;
38
39 while ((status = inl(emu->port + IPR)) != 0) {
40 // printk("irq - status = 0x%x\n", status);
41 orig_status = status;
42 handled = 1;
43 if (status & IPR_PCIERROR) {
44 snd_printk("interrupt: PCI error\n");
45 snd_emu10k1_intr_disable(emu, INTE_PCIERRORENABLE);
46 status &= ~IPR_PCIERROR;
47 }
48 if (status & (IPR_VOLINCR|IPR_VOLDECR|IPR_MUTE)) {
49 if (emu->hwvol_interrupt)
50 emu->hwvol_interrupt(emu, status);
51 else
52 snd_emu10k1_intr_disable(emu, INTE_VOLINCRENABLE|INTE_VOLDECRENABLE|INTE_MUTEENABLE);
53 status &= ~(IPR_VOLINCR|IPR_VOLDECR|IPR_MUTE);
54 }
55 if (status & IPR_CHANNELLOOP) {
56 int voice;
57 int voice_max = status & IPR_CHANNELNUMBERMASK;
58 u32 val;
59 emu10k1_voice_t *pvoice = emu->voices;
60
61 val = snd_emu10k1_ptr_read(emu, CLIPL, 0);
62 for (voice = 0; voice <= voice_max; voice++) {
63 if (voice == 0x20)
64 val = snd_emu10k1_ptr_read(emu, CLIPH, 0);
65 if (val & 1) {
66 if (pvoice->use && pvoice->interrupt != NULL) {
67 pvoice->interrupt(emu, pvoice);
68 snd_emu10k1_voice_intr_ack(emu, voice);
69 } else {
70 snd_emu10k1_voice_intr_disable(emu, voice);
71 }
72 }
73 val >>= 1;
74 pvoice++;
75 }
76 status &= ~IPR_CHANNELLOOP;
77 }
78 status &= ~IPR_CHANNELNUMBERMASK;
79 if (status & (IPR_ADCBUFFULL|IPR_ADCBUFHALFFULL)) {
80 if (emu->capture_interrupt)
81 emu->capture_interrupt(emu, status);
82 else
83 snd_emu10k1_intr_disable(emu, INTE_ADCBUFENABLE);
84 status &= ~(IPR_ADCBUFFULL|IPR_ADCBUFHALFFULL);
85 }
86 if (status & (IPR_MICBUFFULL|IPR_MICBUFHALFFULL)) {
87 if (emu->capture_mic_interrupt)
88 emu->capture_mic_interrupt(emu, status);
89 else
90 snd_emu10k1_intr_disable(emu, INTE_MICBUFENABLE);
91 status &= ~(IPR_MICBUFFULL|IPR_MICBUFHALFFULL);
92 }
93 if (status & (IPR_EFXBUFFULL|IPR_EFXBUFHALFFULL)) {
94 if (emu->capture_efx_interrupt)
95 emu->capture_efx_interrupt(emu, status);
96 else
97 snd_emu10k1_intr_disable(emu, INTE_EFXBUFENABLE);
98 status &= ~(IPR_EFXBUFFULL|IPR_EFXBUFHALFFULL);
99 }
100 if (status & (IPR_MIDITRANSBUFEMPTY|IPR_MIDIRECVBUFEMPTY)) {
101 if (emu->midi.interrupt)
102 emu->midi.interrupt(emu, status);
103 else
104 snd_emu10k1_intr_disable(emu, INTE_MIDITXENABLE|INTE_MIDIRXENABLE);
105 status &= ~(IPR_MIDITRANSBUFEMPTY|IPR_MIDIRECVBUFEMPTY);
106 }
107 if (status & (IPR_A_MIDITRANSBUFEMPTY2|IPR_A_MIDIRECVBUFEMPTY2)) {
108 if (emu->midi2.interrupt)
109 emu->midi2.interrupt(emu, status);
110 else
111 snd_emu10k1_intr_disable(emu, INTE_A_MIDITXENABLE2|INTE_A_MIDIRXENABLE2);
112 status &= ~(IPR_A_MIDITRANSBUFEMPTY2|IPR_A_MIDIRECVBUFEMPTY2);
113 }
114 if (status & IPR_INTERVALTIMER) {
115 if (emu->timer)
116 snd_timer_interrupt(emu->timer, emu->timer->sticks);
117 else
118 snd_emu10k1_intr_disable(emu, INTE_INTERVALTIMERENB);
119 status &= ~IPR_INTERVALTIMER;
120 }
121 if (status & (IPR_GPSPDIFSTATUSCHANGE|IPR_CDROMSTATUSCHANGE)) {
122 if (emu->spdif_interrupt)
123 emu->spdif_interrupt(emu, status);
124 else
125 snd_emu10k1_intr_disable(emu, INTE_GPSPDIFENABLE|INTE_CDSPDIFENABLE);
126 status &= ~(IPR_GPSPDIFSTATUSCHANGE|IPR_CDROMSTATUSCHANGE);
127 }
128 if (status & IPR_FXDSP) {
129 if (emu->dsp_interrupt)
130 emu->dsp_interrupt(emu);
131 else
132 snd_emu10k1_intr_disable(emu, INTE_FXDSPENABLE);
133 status &= ~IPR_FXDSP;
134 }
135 if (status) {
136 unsigned int bits;
137 snd_printk(KERN_ERR "emu10k1: unhandled interrupt: 0x%08x\n", status);
138 //make sure any interrupts we don't handle are disabled:
139 bits = INTE_FXDSPENABLE |
140 INTE_PCIERRORENABLE |
141 INTE_VOLINCRENABLE |
142 INTE_VOLDECRENABLE |
143 INTE_MUTEENABLE |
144 INTE_MICBUFENABLE |
145 INTE_ADCBUFENABLE |
146 INTE_EFXBUFENABLE |
147 INTE_GPSPDIFENABLE |
148 INTE_CDSPDIFENABLE |
149 INTE_INTERVALTIMERENB |
150 INTE_MIDITXENABLE |
151 INTE_MIDIRXENABLE;
152 if (emu->audigy)
153 bits |= INTE_A_MIDITXENABLE2 | INTE_A_MIDIRXENABLE2;
154 snd_emu10k1_intr_disable(emu, bits);
155 }
156 outl(orig_status, emu->port + IPR); /* ack all */
157 }
158 return IRQ_RETVAL(handled);
159 }
160
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