sound/isa/gus/gus_irq.c

   1 /*
   2  *  Routine for IRQ handling from GF1/InterWave chip
   3  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
   4  *
   5  *
   6  *   This program is free software; you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation; either version 2 of the License, or
   9  *   (at your option) any later version.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program; if not, write to the Free Software
  18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  19  *
  20  */
  21
  22 #include <sound/driver.h>
  23 #include <sound/core.h>
  24 #include <sound/info.h>
  25 #include <sound/gus.h>
  26
  27 #ifdef CONFIG_SND_DEBUG
  28 #define STAT_ADD(x)     ((x)++)
  29 #else
  30 #define STAT_ADD(x)     while (0) { ; }
  31 #endif
  32
  33 irqreturn_t snd_gus_interrupt(int irq, void *dev_id)
  34 {
  35         struct snd_gus_card * gus = dev_id;
  36         unsigned char status;
  37         int loop = 100;
  38         int handled = 0;
  39
  40 __again:
  41         status = inb(gus->gf1.reg_irqstat);
  42         if (status == 0)
  43                 return IRQ_RETVAL(handled);
  44         handled = 1;
  45         // snd_printk("IRQ: status = 0x%x\n", status);
  46         if (status & 0x02) {
  47                 STAT_ADD(gus->gf1.interrupt_stat_midi_in);
  48                 gus->gf1.interrupt_handler_midi_in(gus);
  49         }
  50         if (status & 0x01) {
  51                 STAT_ADD(gus->gf1.interrupt_stat_midi_out);
  52                 gus->gf1.interrupt_handler_midi_out(gus);
  53         }
  54         if (status & (0x20 | 0x40)) {
  55                 unsigned int already, _current_;
  56                 unsigned char voice_status, voice;
  57                 struct snd_gus_voice *pvoice;
  58
  59                 already = 0;
  60                 while (((voice_status = snd_gf1_i_read8(gus, SNDRV_GF1_GB_VOICES_IRQ)) & 0xc0) != 0xc0) {
  61                         voice = voice_status & 0x1f;
  62                         _current_ = 1 << voice;
  63                         if (already & _current_)
  64                                 continue;       /* multi request */
  65                         already |= _current_;   /* mark request */
  66 #if 0
  67                         printk("voice = %i, voice_status = 0x%x, voice_verify = %i\n", voice, voice_status, inb(GUSP(gus, GF1PAGE)));
  68 #endif
  69                         pvoice = &gus->gf1.voices[voice];
  70                         if (pvoice->use) {
  71                                 if (!(voice_status & 0x80)) {   /* voice position IRQ */
  72                                         STAT_ADD(pvoice->interrupt_stat_wave);
  73                                         pvoice->handler_wave(gus, pvoice);
  74                                 }
  75                                 if (!(voice_status & 0x40)) {   /* volume ramp IRQ */
  76                                         STAT_ADD(pvoice->interrupt_stat_volume);
  77                                         pvoice->handler_volume(gus, pvoice);
  78                                 }
  79                         } else {
  80                                 STAT_ADD(gus->gf1.interrupt_stat_voice_lost);
  81                                 snd_gf1_i_ctrl_stop(gus, SNDRV_GF1_VB_ADDRESS_CONTROL);
  82                                 snd_gf1_i_ctrl_stop(gus, SNDRV_GF1_VB_VOLUME_CONTROL);
  83                         }
  84                 }
  85         }
  86         if (status & 0x04) {
  87                 STAT_ADD(gus->gf1.interrupt_stat_timer1);
  88                 gus->gf1.interrupt_handler_timer1(gus);
  89         }
  90         if (status & 0x08) {
  91                 STAT_ADD(gus->gf1.interrupt_stat_timer2);
  92                 gus->gf1.interrupt_handler_timer2(gus);
  93         }
  94         if (status & 0x80) {
  95                 if (snd_gf1_i_look8(gus, SNDRV_GF1_GB_DRAM_DMA_CONTROL) & 0x40) {
  96                         STAT_ADD(gus->gf1.interrupt_stat_dma_write);
  97                         gus->gf1.interrupt_handler_dma_write(gus);
  98                 }
  99                 if (snd_gf1_i_look8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL) & 0x40) {
 100                         STAT_ADD(gus->gf1.interrupt_stat_dma_read);
 101                         gus->gf1.interrupt_handler_dma_read(gus);
 102                 }
 103         }
 104         if (--loop > 0)
 105                 goto __again;
 106         return IRQ_NONE;
 107 }
 108
 109 #ifdef CONFIG_SND_DEBUG
 110 static void snd_gus_irq_info_read(struct snd_info_entry *entry,
 111                                   struct snd_info_buffer *buffer)
 112 {
 113         struct snd_gus_card *gus;
 114         struct snd_gus_voice *pvoice;
 115         int idx;
 116
 117         gus = entry->private_data;
 118         snd_iprintf(buffer, "midi out = %u\n", gus->gf1.interrupt_stat_midi_out);
 119         snd_iprintf(buffer, "midi in = %u\n", gus->gf1.interrupt_stat_midi_in);
 120         snd_iprintf(buffer, "timer1 = %u\n", gus->gf1.interrupt_stat_timer1);
 121         snd_iprintf(buffer, "timer2 = %u\n", gus->gf1.interrupt_stat_timer2);
 122         snd_iprintf(buffer, "dma write = %u\n", gus->gf1.interrupt_stat_dma_write);
 123         snd_iprintf(buffer, "dma read = %u\n", gus->gf1.interrupt_stat_dma_read);
 124         snd_iprintf(buffer, "voice lost = %u\n", gus->gf1.interrupt_stat_voice_lost);
 125         for (idx = 0; idx < 32; idx++) {
 126                 pvoice = &gus->gf1.voices[idx];
 127                 snd_iprintf(buffer, "voice %i: wave = %u, volume = %u\n",
 128                                         idx,
 129                                         pvoice->interrupt_stat_wave,
 130                                         pvoice->interrupt_stat_volume);
 131         }
 132 }
 133
 134 void snd_gus_irq_profile_init(struct snd_gus_card *gus)
 135 {
 136         struct snd_info_entry *entry;
 137
 138         if (! snd_card_proc_new(gus->card, "gusirq", &entry))
 139                 snd_info_set_text_ops(entry, gus, snd_gus_irq_info_read);
 140 }
 141
 142 #endif