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Linux/sound/isa/gus/gus_irq.c

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  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 
 32 irqreturn_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
117 static 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 
141 void 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 

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