LXR linux/sound/isa/gus/gus

   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/core.h>
  23#include <sound/info.h>
  24#include <sound/gus.h>
  25
  26#ifdef CONFIG_SND_DEBUG
  27#define STAT_ADD(x)     ((x)++)
  28#else
  29#define STAT_ADD(x)     while (0) { ; }
  30#endif
  31
  32irqreturn_t snd_gus_interrupt(int irq, void *dev_id)
  33{
  34        struct snd_gus_card * gus = dev_id;
  35        unsigned char status;
  36        int loop = 100;
  37        int handled = 0;
  38
  39__again:
  40        status = inb(gus->gf1.reg_irqstat);
  41        if (status == 0)
  42                return IRQ_RETVAL(handled);
  43        handled = 1;
  44        /* snd_printk(KERN_DEBUG "IRQ: status = 0x%x\n", status); */
  45        if (status & 0x02) {
  46                STAT_ADD(gus->gf1.interrupt_stat_midi_in);
  47                if (gus->gf1.interrupt_handler_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                if (gus->gf1.interrupt_handler_midi_out)
  53                        gus->gf1.interrupt_handler_midi_out(gus);
  54        }
  55        if (status & (0x20 | 0x40)) {
  56                unsigned int already, _current_;
  57                unsigned char voice_status, voice;
  58                struct snd_gus_voice *pvoice;
  59
  60                already = 0;
  61                while (((voice_status = snd_gf1_i_read8(gus, SNDRV_GF1_GB_VOICES_IRQ)) & 0xc0) != 0xc0) {
  62                        voice = voice_status & 0x1f;
  63                        _current_ = 1 << voice;
  64                        if (already & _current_)
  65                                continue;       /* multi request */
  66                        already |= _current_;   /* mark request */
  67#if 0
  68                        printk(KERN_DEBUG "voice = %i, voice_status = 0x%x, "
  69                               "voice_verify = %i\n",
  70                               voice, voice_status, inb(GUSP(gus, GF1PAGE)));
  71#endif
  72                        pvoice = &gus->gf1.voices[voice]; 
  73                        if (pvoice->use) {
  74                                if (!(voice_status & 0x80)) {   /* voice position IRQ */
  75                                        STAT_ADD(pvoice->interrupt_stat_wave);
  76                                        pvoice->handler_wave(gus, pvoice);
  77                                }
  78                                if (!(voice_status & 0x40)) {   /* volume ramp IRQ */
  79                                        STAT_ADD(pvoice->interrupt_stat_volume);
  80                                        pvoice->handler_volume(gus, pvoice);
  81                                }
  82                        } else {
  83                                STAT_ADD(gus->gf1.interrupt_stat_voice_lost);
  84                                snd_gf1_i_ctrl_stop(gus, SNDRV_GF1_VB_ADDRESS_CONTROL);
  85                                snd_gf1_i_ctrl_stop(gus, SNDRV_GF1_VB_VOLUME_CONTROL);
  86                        }
  87                }
  88        }
  89        if (status & 0x04) {
  90                STAT_ADD(gus->gf1.interrupt_stat_timer1);
  91                if (gus->gf1.interrupt_handler_timer1)
  92                        gus->gf1.interrupt_handler_timer1(gus);
  93        }
  94        if (status & 0x08) {
  95                STAT_ADD(gus->gf1.interrupt_stat_timer2);
  96                if (gus->gf1.interrupt_handler_timer2)
  97                        gus->gf1.interrupt_handler_timer2(gus);
  98        }
  99        if (status & 0x80) {
 100                if (snd_gf1_i_look8(gus, SNDRV_GF1_GB_DRAM_DMA_CONTROL) & 0x40) {
 101                        STAT_ADD(gus->gf1.interrupt_stat_dma_write);
 102                        if (gus->gf1.interrupt_handler_dma_write)
 103                                gus->gf1.interrupt_handler_dma_write(gus);
 104                }
 105                if (snd_gf1_i_look8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL) & 0x40) {
 106                        STAT_ADD(gus->gf1.interrupt_stat_dma_read);
 107                        if (gus->gf1.interrupt_handler_dma_read)
 108                                gus->gf1.interrupt_handler_dma_read(gus);
 109                }
 110        }
 111        if (--loop > 0)
 112                goto __again;
 113        return IRQ_NONE;
 114}
 115
 116#ifdef CONFIG_SND_DEBUG
 117static void snd_gus_irq_info_read(struct snd_info_entry *entry, 
 118                                  struct snd_info_buffer *buffer)
 119{
 120        struct snd_gus_card *gus;
 121        struct snd_gus_voice *pvoice;
 122        int idx;
 123
 124        gus = entry->private_data;
 125        snd_iprintf(buffer, "midi out = %u\n", gus->gf1.interrupt_stat_midi_out);
 126        snd_iprintf(buffer, "midi in = %u\n", gus->gf1.interrupt_stat_midi_in);
 127        snd_iprintf(buffer, "timer1 = %u\n", gus->gf1.interrupt_stat_timer1);
 128        snd_iprintf(buffer, "timer2 = %u\n", gus->gf1.interrupt_stat_timer2);
 129        snd_iprintf(buffer, "dma write = %u\n", gus->gf1.interrupt_stat_dma_write);
 130        snd_iprintf(buffer, "dma read = %u\n", gus->gf1.interrupt_stat_dma_read);
 131        snd_iprintf(buffer, "voice lost = %u\n", gus->gf1.interrupt_stat_voice_lost);
 132        for (idx = 0; idx < 32; idx++) {
 133                pvoice = &gus->gf1.voices[idx];
 134                snd_iprintf(buffer, "voice %i: wave = %u, volume = %u\n",
 135                                        idx,
 136                                        pvoice->interrupt_stat_wave,
 137                                        pvoice->interrupt_stat_volume);
 138        }
 139}
 140
 141void snd_gus_irq_profile_init(struct snd_gus_card *gus)
 142{
 143        struct snd_info_entry *entry;
 144
 145        if (! snd_card_proc_new(gus->card, "gusirq", &entry))
 146                snd_info_set_text_ops(entry, gus, snd_gus_irq_info_read);
 147}
 148
 149#endif
 150