Merge branch 'virtex-for-2.6.25' of git://git.secretlab.ca/git/linux-2.6-virtex into...
[linux-2.6] / sound / isa / gus / gus_irq.c
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