1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * Routine for IRQ handling from GF1/InterWave chip |
4 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
5 | */ |
6 | |
7 | #include <sound/core.h> |
8 | #include <sound/info.h> |
9 | #include <sound/gus.h> |
10 | |
11 | #ifdef CONFIG_SND_DEBUG |
12 | #define STAT_ADD(x) ((x)++) |
13 | #else |
14 | #define STAT_ADD(x) while (0) { ; } |
15 | #endif |
16 | |
17 | irqreturn_t snd_gus_interrupt(int irq, void *dev_id) |
18 | { |
19 | struct snd_gus_card * gus = dev_id; |
20 | unsigned char status; |
21 | int loop = 100; |
22 | int handled = 0; |
23 | |
24 | __again: |
25 | status = inb(port: gus->gf1.reg_irqstat); |
26 | if (status == 0) |
27 | return IRQ_RETVAL(handled); |
28 | handled = 1; |
29 | /* snd_printk(KERN_DEBUG "IRQ: status = 0x%x\n", status); */ |
30 | if (status & 0x02) { |
31 | STAT_ADD(gus->gf1.interrupt_stat_midi_in); |
32 | if (gus->gf1.interrupt_handler_midi_in) |
33 | gus->gf1.interrupt_handler_midi_in(gus); |
34 | } |
35 | if (status & 0x01) { |
36 | STAT_ADD(gus->gf1.interrupt_stat_midi_out); |
37 | if (gus->gf1.interrupt_handler_midi_out) |
38 | gus->gf1.interrupt_handler_midi_out(gus); |
39 | } |
40 | if (status & (0x20 | 0x40)) { |
41 | unsigned int already, _current_; |
42 | unsigned char voice_status, voice; |
43 | struct snd_gus_voice *pvoice; |
44 | |
45 | already = 0; |
46 | while (((voice_status = snd_gf1_i_read8(gus, SNDRV_GF1_GB_VOICES_IRQ)) & 0xc0) != 0xc0) { |
47 | voice = voice_status & 0x1f; |
48 | _current_ = 1 << voice; |
49 | if (already & _current_) |
50 | continue; /* multi request */ |
51 | already |= _current_; /* mark request */ |
52 | #if 0 |
53 | printk(KERN_DEBUG "voice = %i, voice_status = 0x%x, " |
54 | "voice_verify = %i\n" , |
55 | voice, voice_status, inb(GUSP(gus, GF1PAGE))); |
56 | #endif |
57 | pvoice = &gus->gf1.voices[voice]; |
58 | if (pvoice->use) { |
59 | if (!(voice_status & 0x80)) { /* voice position IRQ */ |
60 | STAT_ADD(pvoice->interrupt_stat_wave); |
61 | pvoice->handler_wave(gus, pvoice); |
62 | } |
63 | if (!(voice_status & 0x40)) { /* volume ramp IRQ */ |
64 | STAT_ADD(pvoice->interrupt_stat_volume); |
65 | pvoice->handler_volume(gus, pvoice); |
66 | } |
67 | } else { |
68 | STAT_ADD(gus->gf1.interrupt_stat_voice_lost); |
69 | snd_gf1_i_ctrl_stop(gus, SNDRV_GF1_VB_ADDRESS_CONTROL); |
70 | snd_gf1_i_ctrl_stop(gus, SNDRV_GF1_VB_VOLUME_CONTROL); |
71 | } |
72 | } |
73 | } |
74 | if (status & 0x04) { |
75 | STAT_ADD(gus->gf1.interrupt_stat_timer1); |
76 | if (gus->gf1.interrupt_handler_timer1) |
77 | gus->gf1.interrupt_handler_timer1(gus); |
78 | } |
79 | if (status & 0x08) { |
80 | STAT_ADD(gus->gf1.interrupt_stat_timer2); |
81 | if (gus->gf1.interrupt_handler_timer2) |
82 | gus->gf1.interrupt_handler_timer2(gus); |
83 | } |
84 | if (status & 0x80) { |
85 | if (snd_gf1_i_look8(gus, SNDRV_GF1_GB_DRAM_DMA_CONTROL) & 0x40) { |
86 | STAT_ADD(gus->gf1.interrupt_stat_dma_write); |
87 | if (gus->gf1.interrupt_handler_dma_write) |
88 | gus->gf1.interrupt_handler_dma_write(gus); |
89 | } |
90 | if (snd_gf1_i_look8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL) & 0x40) { |
91 | STAT_ADD(gus->gf1.interrupt_stat_dma_read); |
92 | if (gus->gf1.interrupt_handler_dma_read) |
93 | gus->gf1.interrupt_handler_dma_read(gus); |
94 | } |
95 | } |
96 | if (--loop > 0) |
97 | goto __again; |
98 | return IRQ_NONE; |
99 | } |
100 | |
101 | #ifdef CONFIG_SND_DEBUG |
102 | static void snd_gus_irq_info_read(struct snd_info_entry *entry, |
103 | struct snd_info_buffer *buffer) |
104 | { |
105 | struct snd_gus_card *gus; |
106 | struct snd_gus_voice *pvoice; |
107 | int idx; |
108 | |
109 | gus = entry->private_data; |
110 | snd_iprintf(buffer, "midi out = %u\n" , gus->gf1.interrupt_stat_midi_out); |
111 | snd_iprintf(buffer, "midi in = %u\n" , gus->gf1.interrupt_stat_midi_in); |
112 | snd_iprintf(buffer, "timer1 = %u\n" , gus->gf1.interrupt_stat_timer1); |
113 | snd_iprintf(buffer, "timer2 = %u\n" , gus->gf1.interrupt_stat_timer2); |
114 | snd_iprintf(buffer, "dma write = %u\n" , gus->gf1.interrupt_stat_dma_write); |
115 | snd_iprintf(buffer, "dma read = %u\n" , gus->gf1.interrupt_stat_dma_read); |
116 | snd_iprintf(buffer, "voice lost = %u\n" , gus->gf1.interrupt_stat_voice_lost); |
117 | for (idx = 0; idx < 32; idx++) { |
118 | pvoice = &gus->gf1.voices[idx]; |
119 | snd_iprintf(buffer, "voice %i: wave = %u, volume = %u\n" , |
120 | idx, |
121 | pvoice->interrupt_stat_wave, |
122 | pvoice->interrupt_stat_volume); |
123 | } |
124 | } |
125 | |
126 | void snd_gus_irq_profile_init(struct snd_gus_card *gus) |
127 | { |
128 | snd_card_ro_proc_new(card: gus->card, name: "gusirq" , private_data: gus, read: snd_gus_irq_info_read); |
129 | } |
130 | |
131 | #endif |
132 | |