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1da177e4 LT |
1 | /* |
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 | ||
7d12e780 | 33 | irqreturn_t snd_gus_interrupt(int irq, void *dev_id) |
1da177e4 | 34 | { |
5e2da206 | 35 | struct snd_gus_card * gus = dev_id; |
1da177e4 LT |
36 | 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; | |
5e2da206 | 57 | struct snd_gus_voice *pvoice; |
1da177e4 LT |
58 | |
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 | |
5e2da206 TI |
110 | static void snd_gus_irq_info_read(struct snd_info_entry *entry, |
111 | struct snd_info_buffer *buffer) | |
1da177e4 | 112 | { |
5e2da206 TI |
113 | struct snd_gus_card *gus; |
114 | struct snd_gus_voice *pvoice; | |
1da177e4 LT |
115 | 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 | ||
5e2da206 | 134 | void snd_gus_irq_profile_init(struct snd_gus_card *gus) |
1da177e4 | 135 | { |
5e2da206 | 136 | struct snd_info_entry *entry; |
1da177e4 LT |
137 | |
138 | if (! snd_card_proc_new(gus->card, "gusirq", &entry)) | |
bf850204 | 139 | snd_info_set_text_ops(entry, gus, snd_gus_irq_info_read); |
1da177e4 LT |
140 | } |
141 | ||
142 | #endif |