blob: c19ba2910b72331928c4ebfbea97273d547ace15 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Routine for IRQ handling from GF1/InterWave chip
3 * Copyright (c) by Jaroslav Kysela <perex@suse.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
33irqreturn_t snd_gus_interrupt(int irq, void *dev_id, struct pt_regs *regs)
34{
Takashi Iwai5e2da202005-11-17 14:36:44 +010035 struct snd_gus_card * gus = dev_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -070036 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;
Takashi Iwai5e2da202005-11-17 14:36:44 +010057 struct snd_gus_voice *pvoice;
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
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
Takashi Iwai5e2da202005-11-17 14:36:44 +0100110static void snd_gus_irq_info_read(struct snd_info_entry *entry,
111 struct snd_info_buffer *buffer)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112{
Takashi Iwai5e2da202005-11-17 14:36:44 +0100113 struct snd_gus_card *gus;
114 struct snd_gus_voice *pvoice;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 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
Takashi Iwai5e2da202005-11-17 14:36:44 +0100134void snd_gus_irq_profile_init(struct snd_gus_card *gus)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135{
Takashi Iwai5e2da202005-11-17 14:36:44 +0100136 struct snd_info_entry *entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137
138 if (! snd_card_proc_new(gus->card, "gusirq", &entry))
139 snd_info_set_text_ops(entry, gus, 1024, snd_gus_irq_info_read);
140}
141
142#endif