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("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("voice = %i, voice_status = 0x%x, voice_verify = %i\n", voice, voice_status, inb(GUSP(gus, GF1PAGE)));
69 #endif
70 pvoice = &gus->gf1.voices[voice];
71 if (pvoice->use) {
72 if (!(voice_status & 0x80)) { /* voice position IRQ */
73 STAT_ADD(pvoice->interrupt_stat_wave);
74 pvoice->handler_wave(gus, pvoice);
75 }
76 if (!(voice_status & 0x40)) { /* volume ramp IRQ */
77 STAT_ADD(pvoice->interrupt_stat_volume);
78 pvoice->handler_volume(gus, pvoice);
79 }
80 } else {
81 STAT_ADD(gus->gf1.interrupt_stat_voice_lost);
82 snd_gf1_i_ctrl_stop(gus, SNDRV_GF1_VB_ADDRESS_CONTROL);
83 snd_gf1_i_ctrl_stop(gus, SNDRV_GF1_VB_VOLUME_CONTROL);
84 }
85 }
86 }
87 if (status & 0x04) {
88 STAT_ADD(gus->gf1.interrupt_stat_timer1);
89 if (gus->gf1.interrupt_handler_timer1)
90 gus->gf1.interrupt_handler_timer1(gus);
91 }
92 if (status & 0x08) {
93 STAT_ADD(gus->gf1.interrupt_stat_timer2);
94 if (gus->gf1.interrupt_handler_timer2)
95 gus->gf1.interrupt_handler_timer2(gus);
96 }
97 if (status & 0x80) {
98 if (snd_gf1_i_look8(gus, SNDRV_GF1_GB_DRAM_DMA_CONTROL) & 0x40) {
99 STAT_ADD(gus->gf1.interrupt_stat_dma_write);
100 if (gus->gf1.interrupt_handler_dma_write)
101 gus->gf1.interrupt_handler_dma_write(gus);
102 }
103 if (snd_gf1_i_look8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL) & 0x40) {
104 STAT_ADD(gus->gf1.interrupt_stat_dma_read);
105 if (gus->gf1.interrupt_handler_dma_read)
106 gus->gf1.interrupt_handler_dma_read(gus);
107 }
108 }
109 if (--loop > 0)
110 goto __again;
111 return IRQ_NONE;
112 }
113
114 #ifdef CONFIG_SND_DEBUG
115 static void snd_gus_irq_info_read(struct snd_info_entry *entry,
116 struct snd_info_buffer *buffer)
117 {
118 struct snd_gus_card *gus;
119 struct snd_gus_voice *pvoice;
120 int idx;
121
122 gus = entry->private_data;
123 snd_iprintf(buffer, "midi out = %u\n", gus->gf1.interrupt_stat_midi_out);
124 snd_iprintf(buffer, "midi in = %u\n", gus->gf1.interrupt_stat_midi_in);
125 snd_iprintf(buffer, "timer1 = %u\n", gus->gf1.interrupt_stat_timer1);
126 snd_iprintf(buffer, "timer2 = %u\n", gus->gf1.interrupt_stat_timer2);
127 snd_iprintf(buffer, "dma write = %u\n", gus->gf1.interrupt_stat_dma_write);
128 snd_iprintf(buffer, "dma read = %u\n", gus->gf1.interrupt_stat_dma_read);
129 snd_iprintf(buffer, "voice lost = %u\n", gus->gf1.interrupt_stat_voice_lost);
130 for (idx = 0; idx < 32; idx++) {
131 pvoice = &gus->gf1.voices[idx];
132 snd_iprintf(buffer, "voice %i: wave = %u, volume = %u\n",
133 idx,
134 pvoice->interrupt_stat_wave,
135 pvoice->interrupt_stat_volume);
136 }
137 }
138
139 void snd_gus_irq_profile_init(struct snd_gus_card *gus)
140 {
141 struct snd_info_entry *entry;
142
143 if (! snd_card_proc_new(gus->card, "gusirq", &entry))
144 snd_info_set_text_ops(entry, gus, snd_gus_irq_info_read);
145 }
146
147 #endif
148
|
This page was automatically generated by the
LXR engine.
|