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, struct pt_regs *regs)
  34 {
  35         emu10k1_t *emu = snd_magic_cast(emu10k1_t, dev_id, return IRQ_NONE);
  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_interrupt)
 116                                 emu->timer_interrupt(emu);
 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 }