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
snd_gus_interrupt(int irq,void * dev_id)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
snd_gus_irq_info_read(struct snd_info_entry * entry,struct snd_info_buffer * buffer)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
snd_gus_irq_profile_init(struct snd_gus_card * gus)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