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
33irqreturn_t snd_gus_interrupt(int irq, void *dev_id)
34{
35	struct snd_gus_card * gus = dev_id;
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;
57		struct snd_gus_voice *pvoice;
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			pvoice = &gus->gf1.voices[voice];
67			if (pvoice->use) {
68				if (!(voice_status & 0x80)) {	/* voice position IRQ */
69					STAT_ADD(pvoice->interrupt_stat_wave);
70					pvoice->handler_wave(gus, pvoice);
71				}
72				if (!(voice_status & 0x40)) {	/* volume ramp IRQ */
73					STAT_ADD(pvoice->interrupt_stat_volume);
74					pvoice->handler_volume(gus, pvoice);
75				}
76			} else {
77				STAT_ADD(gus->gf1.interrupt_stat_voice_lost);
78				snd_gf1_i_ctrl_stop(gus, SNDRV_GF1_VB_ADDRESS_CONTROL);
79				snd_gf1_i_ctrl_stop(gus, SNDRV_GF1_VB_VOLUME_CONTROL);
80			}
81		}
82	}
83	if (status & 0x04) {
84		STAT_ADD(gus->gf1.interrupt_stat_timer1);
85		gus->gf1.interrupt_handler_timer1(gus);
86	}
87	if (status & 0x08) {
88		STAT_ADD(gus->gf1.interrupt_stat_timer2);
89		gus->gf1.interrupt_handler_timer2(gus);
90	}
91	if (status & 0x80) {
92		if (snd_gf1_i_look8(gus, SNDRV_GF1_GB_DRAM_DMA_CONTROL) & 0x40) {
93			STAT_ADD(gus->gf1.interrupt_stat_dma_write);
94			gus->gf1.interrupt_handler_dma_write(gus);
95		}
96		if (snd_gf1_i_look8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL) & 0x40) {
97			STAT_ADD(gus->gf1.interrupt_stat_dma_read);
98			gus->gf1.interrupt_handler_dma_read(gus);
99		}
100	}
101	if (--loop > 0)
102		goto __again;
103	return IRQ_NONE;
104}
105
106#ifdef CONFIG_SND_DEBUG
107static void snd_gus_irq_info_read(struct snd_info_entry *entry,
108				  struct snd_info_buffer *buffer)
109{
110	struct snd_gus_card *gus;
111	struct snd_gus_voice *pvoice;
112	int idx;
113
114	gus = entry->private_data;
115	snd_iprintf(buffer, "midi out = %u\n", gus->gf1.interrupt_stat_midi_out);
116	snd_iprintf(buffer, "midi in = %u\n", gus->gf1.interrupt_stat_midi_in);
117	snd_iprintf(buffer, "timer1 = %u\n", gus->gf1.interrupt_stat_timer1);
118	snd_iprintf(buffer, "timer2 = %u\n", gus->gf1.interrupt_stat_timer2);
119	snd_iprintf(buffer, "dma write = %u\n", gus->gf1.interrupt_stat_dma_write);
120	snd_iprintf(buffer, "dma read = %u\n", gus->gf1.interrupt_stat_dma_read);
121	snd_iprintf(buffer, "voice lost = %u\n", gus->gf1.interrupt_stat_voice_lost);
122	for (idx = 0; idx < 32; idx++) {
123		pvoice = &gus->gf1.voices[idx];
124		snd_iprintf(buffer, "voice %i: wave = %u, volume = %u\n",
125					idx,
126					pvoice->interrupt_stat_wave,
127					pvoice->interrupt_stat_volume);
128	}
129}
130
131void snd_gus_irq_profile_init(struct snd_gus_card *gus)
132{
133	struct snd_info_entry *entry;
134
135	if (! snd_card_proc_new(gus->card, "gusirq", &entry))
136		snd_info_set_text_ops(entry, gus, snd_gus_irq_info_read);
137}
138
139#endif
140