release/src-rt-6.x.4708/linux/linux-2.6.36/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                         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 }