Linux Kernel  3.7.1
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
irq.c
Go to the documentation of this file.
1 /*
2  * Copyright (c) by Jaroslav Kysela <[email protected]>
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 
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 }
Generated on Thu Jan 10 2013 12:51:35 for Linux Kernel by   doxygen 1.8.2