IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
[linux-2.6.git] / sound / pci / emu10k1 / irq.c
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)
34 {
35         struct snd_emu10k1 *emu = dev_id;
36         unsigned int status, status2, orig_status, orig_status2;
37         int handled = 0;
38
39         while ((status = inl(emu->port + IPR)) != 0) {
40                 //snd_printk(KERN_INFO "emu10k1 irq - status = 0x%x\n", status);
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         return IRQ_RETVAL(handled);
205 }