kernel/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         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                         dev_info(emu->card->dev,
  45                                  "Suspected sound card removal\n");
  46                         break;
  47                 }
  48                 if (status & IPR_PCIERROR) {
  49                         dev_err(emu->card->dev, "interrupt: PCI error\n");
  50                         snd_emu10k1_intr_disable(emu, INTE_PCIERRORENABLE);
  51                         status &= ~IPR_PCIERROR;
  52                 }
  53                 if (status & (IPR_VOLINCR|IPR_VOLDECR|IPR_MUTE)) {
  54                         if (emu->hwvol_interrupt)
  55                                 emu->hwvol_interrupt(emu, status);
  56                         else
  57                                 snd_emu10k1_intr_disable(emu, INTE_VOLINCRENABLE|INTE_VOLDECRENABLE|INTE_MUTEENABLE);
  58                         status &= ~(IPR_VOLINCR|IPR_VOLDECR|IPR_MUTE);
  59                 }
  60                 if (status & IPR_CHANNELLOOP) {
  61                         int voice;
  62                         int voice_max = status & IPR_CHANNELNUMBERMASK;
  63                         u32 val;
  64                         struct snd_emu10k1_voice *pvoice = emu->voices;
  65
  66                         val = snd_emu10k1_ptr_read(emu, CLIPL, 0);
  67                         for (voice = 0; voice <= voice_max; voice++) {
  68                                 if (voice == 0x20)
  69                                         val = snd_emu10k1_ptr_read(emu, CLIPH, 0);
  70                                 if (val & 1) {
  71                                         if (pvoice->use && pvoice->interrupt != NULL) {
  72                                                 pvoice->interrupt(emu, pvoice);
  73                                                 snd_emu10k1_voice_intr_ack(emu, voice);
  74                                         } else {
  75                                                 snd_emu10k1_voice_intr_disable(emu, voice);
  76                                         }
  77                                 }
  78                                 val >>= 1;
  79                                 pvoice++;
  80                         }
  81                         val = snd_emu10k1_ptr_read(emu, HLIPL, 0);
  82                         for (voice = 0; voice <= voice_max; voice++) {
  83                                 if (voice == 0x20)
  84                                         val = snd_emu10k1_ptr_read(emu, HLIPH, 0);
  85                                 if (val & 1) {
  86                                         if (pvoice->use && pvoice->interrupt != NULL) {
  87                                                 pvoice->interrupt(emu, pvoice);
  88                                                 snd_emu10k1_voice_half_loop_intr_ack(emu, voice);
  89                                         } else {
  90                                                 snd_emu10k1_voice_half_loop_intr_disable(emu, voice);
  91                                         }
  92                                 }
  93                                 val >>= 1;
  94                                 pvoice++;
  95                         }
  96                         status &= ~IPR_CHANNELLOOP;
  97                 }
  98                 status &= ~IPR_CHANNELNUMBERMASK;
  99                 if (status & (IPR_ADCBUFFULL|IPR_ADCBUFHALFFULL)) {
 100                         if (emu->capture_interrupt)
 101                                 emu->capture_interrupt(emu, status);
 102                         else
 103                                 snd_emu10k1_intr_disable(emu, INTE_ADCBUFENABLE);
 104                         status &= ~(IPR_ADCBUFFULL|IPR_ADCBUFHALFFULL);
 105                 }
 106                 if (status & (IPR_MICBUFFULL|IPR_MICBUFHALFFULL)) {
 107                         if (emu->capture_mic_interrupt)
 108                                 emu->capture_mic_interrupt(emu, status);
 109                         else
 110                                 snd_emu10k1_intr_disable(emu, INTE_MICBUFENABLE);
 111                         status &= ~(IPR_MICBUFFULL|IPR_MICBUFHALFFULL);
 112                 }
 113                 if (status & (IPR_EFXBUFFULL|IPR_EFXBUFHALFFULL)) {
 114                         if (emu->capture_efx_interrupt)
 115                                 emu->capture_efx_interrupt(emu, status);
 116                         else
 117                                 snd_emu10k1_intr_disable(emu, INTE_EFXBUFENABLE);
 118                         status &= ~(IPR_EFXBUFFULL|IPR_EFXBUFHALFFULL);
 119                 }
 120                 if (status & (IPR_MIDITRANSBUFEMPTY|IPR_MIDIRECVBUFEMPTY)) {
 121                         if (emu->midi.interrupt)
 122                                 emu->midi.interrupt(emu, status);
 123                         else
 124                                 snd_emu10k1_intr_disable(emu, INTE_MIDITXENABLE|INTE_MIDIRXENABLE);
 125                         status &= ~(IPR_MIDITRANSBUFEMPTY|IPR_MIDIRECVBUFEMPTY);
 126                 }
 127                 if (status & (IPR_A_MIDITRANSBUFEMPTY2|IPR_A_MIDIRECVBUFEMPTY2)) {
 128                         if (emu->midi2.interrupt)
 129                                 emu->midi2.interrupt(emu, status);
 130                         else
 131                                 snd_emu10k1_intr_disable(emu, INTE_A_MIDITXENABLE2|INTE_A_MIDIRXENABLE2);
 132                         status &= ~(IPR_A_MIDITRANSBUFEMPTY2|IPR_A_MIDIRECVBUFEMPTY2);
 133                 }
 134                 if (status & IPR_INTERVALTIMER) {
 135                         if (emu->timer)
 136                                 snd_timer_interrupt(emu->timer, emu->timer->sticks);
 137                         else
 138                                 snd_emu10k1_intr_disable(emu, INTE_INTERVALTIMERENB);
 139                         status &= ~IPR_INTERVALTIMER;
 140                 }
 141                 if (status & (IPR_GPSPDIFSTATUSCHANGE|IPR_CDROMSTATUSCHANGE)) {
 142                         if (emu->spdif_interrupt)
 143                                 emu->spdif_interrupt(emu, status);
 144                         else
 145                                 snd_emu10k1_intr_disable(emu, INTE_GPSPDIFENABLE|INTE_CDSPDIFENABLE);
 146                         status &= ~(IPR_GPSPDIFSTATUSCHANGE|IPR_CDROMSTATUSCHANGE);
 147                 }
 148                 if (status & IPR_FXDSP) {
 149                         if (emu->dsp_interrupt)
 150                                 emu->dsp_interrupt(emu);
 151                         else
 152                                 snd_emu10k1_intr_disable(emu, INTE_FXDSPENABLE);
 153                         status &= ~IPR_FXDSP;
 154                 }
 155                 if (status & IPR_P16V) {
 156                         while ((status2 = inl(emu->port + IPR2)) != 0) {
 157                                 u32 mask = INTE2_PLAYBACK_CH_0_LOOP;  /* Full Loop */
 158                                 struct snd_emu10k1_voice *pvoice = &(emu->p16v_voices[0]);
 159                                 struct snd_emu10k1_voice *cvoice = &(emu->p16v_capture_voice);
 160
 161                                 /* dev_dbg(emu->card->dev, "status2=0x%x\n", status2); */
 162                                 orig_status2 = status2;
 163                                 if(status2 & mask) {
 164                                         if(pvoice->use) {
 165                                                 snd_pcm_period_elapsed(pvoice->epcm->substream);
 166                                         } else {
 167                                                 dev_err(emu->card->dev,
 168                                                         "p16v: status: 0x%08x, mask=0x%08x, pvoice=%p, use=%d\n",
 169                                                         status2, mask, pvoice,
 170                                                         pvoice->use);
 171                                         }
 172                                 }
 173                                 if(status2 & 0x110000) {
 174                                         /* dev_info(emu->card->dev, "capture int found\n"); */
 175                                         if(cvoice->use) {
 176                                                 /* dev_info(emu->card->dev, "capture period_elapsed\n"); */
 177                                                 snd_pcm_period_elapsed(cvoice->epcm->substream);
 178                                         }
 179                                 }
 180                                 outl(orig_status2, emu->port + IPR2); /* ack all */
 181                         }
 182                         status &= ~IPR_P16V;
 183                 }
 184
 185                 if (status) {
 186                         unsigned int bits;
 187                         dev_err(emu->card->dev,
 188                                 "unhandled interrupt: 0x%08x\n", status);
 189                         //make sure any interrupts we don't handle are disabled:
 190                         bits = INTE_FXDSPENABLE |
 191                                 INTE_PCIERRORENABLE |
 192                                 INTE_VOLINCRENABLE |
 193                                 INTE_VOLDECRENABLE |
 194                                 INTE_MUTEENABLE |
 195                                 INTE_MICBUFENABLE |
 196                                 INTE_ADCBUFENABLE |
 197                                 INTE_EFXBUFENABLE |
 198                                 INTE_GPSPDIFENABLE |
 199                                 INTE_CDSPDIFENABLE |
 200                                 INTE_INTERVALTIMERENB |
 201                                 INTE_MIDITXENABLE |
 202                                 INTE_MIDIRXENABLE;
 203                         if (emu->audigy)
 204                                 bits |= INTE_A_MIDITXENABLE2 | INTE_A_MIDIRXENABLE2;
 205                         snd_emu10k1_intr_disable(emu, bits);
 206                 }
 207                 outl(orig_status, emu->port + IPR); /* ack all */
 208         }
 209         if (timeout == 1000)
 210                 dev_info(emu->card->dev, "emu10k1 irq routine failure\n");
 211
 212         return IRQ_RETVAL(handled);
 213 }