sound/pci/emu10k1/irq.c

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