1 /*
2 * Copyright (c) by Jaroslav Kysela <perex@perex.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 <linux/time.h>
29 #include <sound/core.h>
30 #include <sound/emu10k1.h>
31
snd_emu10k1_interrupt(int irq,void * dev_id)32 irqreturn_t snd_emu10k1_interrupt(int irq, void *dev_id)
33 {
34 struct snd_emu10k1 *emu = dev_id;
35 unsigned int status, status2, orig_status, orig_status2;
36 int handled = 0;
37 int timeout = 0;
38
39 while (((status = inl(emu->port + IPR)) != 0) && (timeout < 1000)) {
40 timeout++;
41 orig_status = status;
42 handled = 1;
43 if ((status & 0xffffffff) == 0xffffffff) {
44 snd_printk(KERN_INFO "snd-emu10k1: Suspected sound card removal\n");
45 break;
46 }
47 if (status & IPR_PCIERROR) {
48 snd_printk(KERN_ERR "interrupt: PCI error\n");
49 snd_emu10k1_intr_disable(emu, INTE_PCIERRORENABLE);
50 status &= ~IPR_PCIERROR;
51 }
52 if (status & (IPR_VOLINCR|IPR_VOLDECR|IPR_MUTE)) {
53 if (emu->hwvol_interrupt)
54 emu->hwvol_interrupt(emu, status);
55 else
56 snd_emu10k1_intr_disable(emu, INTE_VOLINCRENABLE|INTE_VOLDECRENABLE|INTE_MUTEENABLE);
57 status &= ~(IPR_VOLINCR|IPR_VOLDECR|IPR_MUTE);
58 }
59 if (status & IPR_CHANNELLOOP) {
60 int voice;
61 int voice_max = status & IPR_CHANNELNUMBERMASK;
62 u32 val;
63 struct snd_emu10k1_voice *pvoice = emu->voices;
64
65 val = snd_emu10k1_ptr_read(emu, CLIPL, 0);
66 for (voice = 0; voice <= voice_max; voice++) {
67 if (voice == 0x20)
68 val = snd_emu10k1_ptr_read(emu, CLIPH, 0);
69 if (val & 1) {
70 if (pvoice->use && pvoice->interrupt != NULL) {
71 pvoice->interrupt(emu, pvoice);
72 snd_emu10k1_voice_intr_ack(emu, voice);
73 } else {
74 snd_emu10k1_voice_intr_disable(emu, voice);
75 }
76 }
77 val >>= 1;
78 pvoice++;
79 }
80 val = snd_emu10k1_ptr_read(emu, HLIPL, 0);
81 for (voice = 0; voice <= voice_max; voice++) {
82 if (voice == 0x20)
83 val = snd_emu10k1_ptr_read(emu, HLIPH, 0);
84 if (val & 1) {
85 if (pvoice->use && pvoice->interrupt != NULL) {
86 pvoice->interrupt(emu, pvoice);
87 snd_emu10k1_voice_half_loop_intr_ack(emu, voice);
88 } else {
89 snd_emu10k1_voice_half_loop_intr_disable(emu, voice);
90 }
91 }
92 val >>= 1;
93 pvoice++;
94 }
95 status &= ~IPR_CHANNELLOOP;
96 }
97 status &= ~IPR_CHANNELNUMBERMASK;
98 if (status & (IPR_ADCBUFFULL|IPR_ADCBUFHALFFULL)) {
99 if (emu->capture_interrupt)
100 emu->capture_interrupt(emu, status);
101 else
102 snd_emu10k1_intr_disable(emu, INTE_ADCBUFENABLE);
103 status &= ~(IPR_ADCBUFFULL|IPR_ADCBUFHALFFULL);
104 }
105 if (status & (IPR_MICBUFFULL|IPR_MICBUFHALFFULL)) {
106 if (emu->capture_mic_interrupt)
107 emu->capture_mic_interrupt(emu, status);
108 else
109 snd_emu10k1_intr_disable(emu, INTE_MICBUFENABLE);
110 status &= ~(IPR_MICBUFFULL|IPR_MICBUFHALFFULL);
111 }
112 if (status & (IPR_EFXBUFFULL|IPR_EFXBUFHALFFULL)) {
113 if (emu->capture_efx_interrupt)
114 emu->capture_efx_interrupt(emu, status);
115 else
116 snd_emu10k1_intr_disable(emu, INTE_EFXBUFENABLE);
117 status &= ~(IPR_EFXBUFFULL|IPR_EFXBUFHALFFULL);
118 }
119 if (status & (IPR_MIDITRANSBUFEMPTY|IPR_MIDIRECVBUFEMPTY)) {
120 if (emu->midi.interrupt)
121 emu->midi.interrupt(emu, status);
122 else
123 snd_emu10k1_intr_disable(emu, INTE_MIDITXENABLE|INTE_MIDIRXENABLE);
124 status &= ~(IPR_MIDITRANSBUFEMPTY|IPR_MIDIRECVBUFEMPTY);
125 }
126 if (status & (IPR_A_MIDITRANSBUFEMPTY2|IPR_A_MIDIRECVBUFEMPTY2)) {
127 if (emu->midi2.interrupt)
128 emu->midi2.interrupt(emu, status);
129 else
130 snd_emu10k1_intr_disable(emu, INTE_A_MIDITXENABLE2|INTE_A_MIDIRXENABLE2);
131 status &= ~(IPR_A_MIDITRANSBUFEMPTY2|IPR_A_MIDIRECVBUFEMPTY2);
132 }
133 if (status & IPR_INTERVALTIMER) {
134 if (emu->timer)
135 snd_timer_interrupt(emu->timer, emu->timer->sticks);
136 else
137 snd_emu10k1_intr_disable(emu, INTE_INTERVALTIMERENB);
138 status &= ~IPR_INTERVALTIMER;
139 }
140 if (status & (IPR_GPSPDIFSTATUSCHANGE|IPR_CDROMSTATUSCHANGE)) {
141 if (emu->spdif_interrupt)
142 emu->spdif_interrupt(emu, status);
143 else
144 snd_emu10k1_intr_disable(emu, INTE_GPSPDIFENABLE|INTE_CDSPDIFENABLE);
145 status &= ~(IPR_GPSPDIFSTATUSCHANGE|IPR_CDROMSTATUSCHANGE);
146 }
147 if (status & IPR_FXDSP) {
148 if (emu->dsp_interrupt)
149 emu->dsp_interrupt(emu);
150 else
151 snd_emu10k1_intr_disable(emu, INTE_FXDSPENABLE);
152 status &= ~IPR_FXDSP;
153 }
154 if (status & IPR_P16V) {
155 while ((status2 = inl(emu->port + IPR2)) != 0) {
156 u32 mask = INTE2_PLAYBACK_CH_0_LOOP; /* Full Loop */
157 struct snd_emu10k1_voice *pvoice = &(emu->p16v_voices[0]);
158 struct snd_emu10k1_voice *cvoice = &(emu->p16v_capture_voice);
159
160 //printk(KERN_INFO "status2=0x%x\n", status2);
161 orig_status2 = status2;
162 if(status2 & mask) {
163 if(pvoice->use) {
164 snd_pcm_period_elapsed(pvoice->epcm->substream);
165 } else {
166 snd_printk(KERN_ERR "p16v: status: 0x%08x, mask=0x%08x, pvoice=%p, use=%d\n", status2, mask, pvoice, pvoice->use);
167 }
168 }
169 if(status2 & 0x110000) {
170 //printk(KERN_INFO "capture int found\n");
171 if(cvoice->use) {
172 //printk(KERN_INFO "capture period_elapsed\n");
173 snd_pcm_period_elapsed(cvoice->epcm->substream);
174 }
175 }
176 outl(orig_status2, emu->port + IPR2); /* ack all */
177 }
178 status &= ~IPR_P16V;
179 }
180
181 if (status) {
182 unsigned int bits;
183 snd_printk(KERN_ERR "emu10k1: unhandled interrupt: 0x%08x\n", status);
184 //make sure any interrupts we don't handle are disabled:
185 bits = INTE_FXDSPENABLE |
186 INTE_PCIERRORENABLE |
187 INTE_VOLINCRENABLE |
188 INTE_VOLDECRENABLE |
189 INTE_MUTEENABLE |
190 INTE_MICBUFENABLE |
191 INTE_ADCBUFENABLE |
192 INTE_EFXBUFENABLE |
193 INTE_GPSPDIFENABLE |
194 INTE_CDSPDIFENABLE |
195 INTE_INTERVALTIMERENB |
196 INTE_MIDITXENABLE |
197 INTE_MIDIRXENABLE;
198 if (emu->audigy)
199 bits |= INTE_A_MIDITXENABLE2 | INTE_A_MIDIRXENABLE2;
200 snd_emu10k1_intr_disable(emu, bits);
201 }
202 outl(orig_status, emu->port + IPR); /* ack all */
203 }
204 if (timeout == 1000)
205 snd_printk(KERN_INFO "emu10k1 irq routine failure\n");
206
207 return IRQ_RETVAL(handled);
208 }
209