aboutsummaryrefslogtreecommitdiff
path: root/sound/drivers/opl3/opl3_seq.c
blob: 6fd60b7e5805532625e77b653553b21cc743c1da (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
/*
 *  Copyright (c) by Uros Bizjak <uros@kss-loka.si>
 *
 *  Midi Sequencer interface routines for OPL2/OPL3/OPL4 FM
 *
 *  OPL2/3 FM instrument loader:
 *   alsa-tools/seq/sbiload/
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */

#include "opl3_voice.h"
#include <linux/init.h>
#include <linux/moduleparam.h>
#include <sound/initval.h>

MODULE_AUTHOR("Uros Bizjak <uros@kss-loka.si>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("ALSA driver for OPL3 FM synth");

int use_internal_drums = 0;
module_param(use_internal_drums, bool, 0444);
MODULE_PARM_DESC(use_internal_drums, "Enable internal OPL2/3 drums.");

int snd_opl3_synth_use_inc(struct snd_opl3 * opl3)
{
	if (!try_module_get(opl3->card->module))
		return -EFAULT;
	return 0;

}

void snd_opl3_synth_use_dec(struct snd_opl3 * opl3)
{
	module_put(opl3->card->module);
}

int snd_opl3_synth_setup(struct snd_opl3 * opl3)
{
	int idx;
	struct snd_hwdep *hwdep = opl3->hwdep;

	mutex_lock(&hwdep->open_mutex);
	if (hwdep->used) {
		mutex_unlock(&hwdep->open_mutex);
		return -EBUSY;
	}
	hwdep->used++;
	mutex_unlock(&hwdep->open_mutex);

	snd_opl3_reset(opl3);

	for (idx = 0; idx < MAX_OPL3_VOICES; idx++) {
		opl3->voices[idx].state = SNDRV_OPL3_ST_OFF;
		opl3->voices[idx].time = 0;
		opl3->voices[idx].keyon_reg = 0x00;
	}
	opl3->use_time = 0;
	opl3->connection_reg = 0x00;
	if (opl3->hardware >= OPL3_HW_OPL3) {
		/* Clear 4-op connections */
		opl3->command(opl3, OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT,
				 opl3->connection_reg);
		opl3->max_voices = MAX_OPL3_VOICES;
	}
	return 0;
}

void snd_opl3_synth_cleanup(struct snd_opl3 * opl3)
{
	unsigned long flags;

	/* Stop system timer */
	spin_lock_irqsave(&opl3->sys_timer_lock, flags);
	if (opl3->sys_timer_status) {
		del_timer(&opl3->tlist);
		opl3->sys_timer_status = 0;
	}
	spin_unlock_irqrestore(&opl3->sys_timer_lock, flags);

	snd_opl3_reset(opl3);
	hwdep = opl3->hwdep;
	mutex_lock(&hwdep->open_mutex);
	hwdep->used--;
	mutex_unlock(&hwdep->open_mutex);
	wake_up(&hwdep->open_wait);
}

static int snd_opl3_synth_use(void *private_data, struct snd_seq_port_subscribe * info)
{
	struct snd_opl3 *opl3 = private_data;
	int err;

	if ((err = snd_opl3_synth_setup(opl3)) < 0)
		return err;

	if (use_internal_drums) {
		/* Percussion mode */
		opl3->voices[6].state = opl3->voices[7].state = 
			opl3->voices[8].state = SNDRV_OPL3_ST_NOT_AVAIL;
		snd_opl3_load_drums(opl3);
		opl3->drum_reg = OPL3_PERCUSSION_ENABLE;
		opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, opl3->drum_reg);
	} else {
		opl3->drum_reg = 0x00;
	}

	if (info->sender.client != SNDRV_SEQ_CLIENT_SYSTEM) {
		if ((err = snd_opl3_synth_use_inc(opl3)) < 0)
			return err;
	}
	opl3->synth_mode = SNDRV_OPL3_MODE_SEQ;
	return 0;
}

static int snd_opl3_synth_unuse(void *private_data, struct snd_seq_port_subscribe * info)
{
	struct snd_opl3 *opl3 = private_data;

	snd_opl3_synth_cleanup(opl3);

	if (info->sender.client != SNDRV_SEQ_CLIENT_SYSTEM)
		snd_opl3_synth_use_dec(opl3);
	return 0;
}

/*
 * MIDI emulation operators
 */
struct snd_midi_op opl3_ops = {
	.note_on =		snd_opl3_note_on,
	.note_off =		snd_opl3_note_off,
	.key_press =		snd_opl3_key_press,
	.note_terminate =	snd_opl3_terminate_note,
	.control =		snd_opl3_control,
	.nrpn =			snd_opl3_nrpn,
	.sysex =		snd_opl3_sysex,
};

static int snd_opl3_synth_event_input(struct snd_seq_event * ev, int direct,
				      void *private_data, int atomic, int hop)
{
	struct snd_opl3 *opl3 = private_data;

	snd_midi_process_event(&opl3_ops, ev, opl3->chset);
	return 0;
}

/* ------------------------------ */

static void snd_opl3_synth_free_port(void *private_data)
{
	struct snd_opl3 *opl3 = private_data;

	snd_midi_channel_free_set(opl3->chset);
}

static int snd_opl3_synth_create_port(struct snd_opl3 * opl3)
{
	struct snd_seq_port_callback callbacks;
	char name[32];
	int voices, opl_ver;

	voices = (opl3->hardware < OPL3_HW_OPL3) ?
		MAX_OPL2_VOICES : MAX_OPL3_VOICES;
	opl3->chset = snd_midi_channel_alloc_set(16);
	if (opl3->chset == NULL)
		return -ENOMEM;
	opl3->chset->private_data = opl3;

	memset(&callbacks, 0, sizeof(callbacks));
	callbacks.owner = THIS_MODULE;
	callbacks.use = snd_opl3_synth_use;
	callbacks.unuse = snd_opl3_synth_unuse;
	callbacks.event_input = snd_opl3_synth_event_input;
	callbacks.private_free = snd_opl3_synth_free_port;
	callbacks.private_data = opl3;

	opl_ver = (opl3->hardware & OPL3_HW_MASK) >> 8;
	sprintf(name, "OPL%i FM Port", opl_ver);

	opl3->chset->client = opl3->seq_client;
	opl3->chset->port = snd_seq_event_port_attach(opl3->seq_client, &callbacks,
						      SNDRV_SEQ_PORT_CAP_WRITE |
						      SNDRV_SEQ_PORT_CAP_SUBS_WRITE,
						      SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
						      SNDRV_SEQ_PORT_TYPE_MIDI_GM |
						      SNDRV_SEQ_PORT_TYPE_DIRECT_SAMPLE |
						      SNDRV_SEQ_PORT_TYPE_HARDWARE |
						      SNDRV_SEQ_PORT_TYPE_SYNTHESIZER,
						      16, voices,
						      name);
	if (opl3->chset->port < 0) {
		int port;
		port = opl3->chset->port;
		snd_midi_channel_free_set(opl3->chset);
		return port;
	}
	return 0;
}

/* ------------------------------ */

static int snd_opl3_seq_new_device(struct snd_seq_device *dev)
{
	struct snd_opl3 *opl3;
	int client, err;
	char name[32];
	int opl_ver;

	opl3 = *(struct snd_opl3 **)SNDRV_SEQ_DEVICE_ARGPTR(dev);
	if (opl3 == NULL)
		return -EINVAL;

	spin_lock_init(&opl3->voice_lock);

	opl3->seq_client = -1;

	/* allocate new client */
	opl_ver = (opl3->hardware & OPL3_HW_MASK) >> 8;
	sprintf(name, "OPL%i FM synth", opl_ver);
	client = opl3->seq_client =
		snd_seq_create_kernel_client(opl3->card, opl3->seq_dev_num,
					     name);
	if (client < 0)
		return client;

	if ((err = snd_opl3_synth_create_port(opl3)) < 0) {
		snd_seq_delete_kernel_client(client);
		opl3->seq_client = -1;
		return err;
	}

	/* setup system timer */
	init_timer(&opl3->tlist);
	opl3->tlist.function = snd_opl3_timer_func;
	opl3->tlist.data = (unsigned long) opl3;
	spin_lock_init(&opl3->sys_timer_lock);
	opl3->sys_timer_status = 0;

#ifdef CONFIG_SND_SEQUENCER_OSS
	snd_opl3_init_seq_oss(opl3, name);
#endif
	return 0;
}

static int snd_opl3_seq_delete_device(struct snd_seq_device *dev)
{
	struct snd_opl3 *opl3;

	opl3 = *(struct snd_opl3 **)SNDRV_SEQ_DEVICE_ARGPTR(dev);
	if (opl3 == NULL)
		return -EINVAL;

#ifdef CONFIG_SND_SEQUENCER_OSS
	snd_opl3_free_seq_oss(opl3);
#endif
	if (opl3->seq_client >= 0) {
		snd_seq_delete_kernel_client(opl3->seq_client);
		opl3->seq_client = -1;
	}
	return 0;
}

static int __init alsa_opl3_seq_init(void)
{
	static struct snd_seq_dev_ops ops =
	{
		snd_opl3_seq_new_device,
		snd_opl3_seq_delete_device
	};

	return snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_OPL3, &ops,
					      sizeof(struct snd_opl3 *));
}

static void __exit alsa_opl3_seq_exit(void)
{
	snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_OPL3);
}

module_init(alsa_opl3_seq_init)
module_exit(alsa_opl3_seq_exit)