1 /*
2 * Copyright (c) by Uros Bizjak <uros@kss-loka.si>
3 *
4 * Midi Sequencer interface routines for OPL2/OPL3/OPL4 FM
5 *
6 * OPL2/3 FM instrument loader:
7 * alsa-tools/seq/sbiload/
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 */
24
25 #include "opl3_voice.h"
26 #include <linux/init.h>
27 #include <linux/moduleparam.h>
28 #include <sound/initval.h>
29
30 MODULE_AUTHOR("Uros Bizjak <uros@kss-loka.si>");
31 MODULE_LICENSE("GPL");
32 MODULE_DESCRIPTION("ALSA driver for OPL3 FM synth");
33
34 int use_internal_drums = 0;
35 module_param(use_internal_drums, bool, 0444);
36 MODULE_PARM_DESC(use_internal_drums, "Enable internal OPL2/3 drums.");
37
38 int snd_opl3_synth_use_inc(opl3_t * opl3)
39 {
40 if (!try_module_get(opl3->card->module))
41 return -EFAULT;
42 return 0;
43
44 }
45
46 void snd_opl3_synth_use_dec(opl3_t * opl3)
47 {
48 module_put(opl3->card->module);
49 }
50
51 int snd_opl3_synth_setup(opl3_t * opl3)
52 {
53 int idx;
54
55 down(&opl3->access_mutex);
56 if (opl3->used) {
57 up(&opl3->access_mutex);
58 return -EBUSY;
59 }
60 opl3->used++;
61 up(&opl3->access_mutex);
62
63 snd_opl3_reset(opl3);
64
65 for (idx = 0; idx < MAX_OPL3_VOICES; idx++) {
66 opl3->voices[idx].state = SNDRV_OPL3_ST_OFF;
67 opl3->voices[idx].time = 0;
68 opl3->voices[idx].keyon_reg = 0x00;
69 }
70 opl3->use_time = 0;
71 opl3->connection_reg = 0x00;
72 if (opl3->hardware >= OPL3_HW_OPL3) {
73 /* Clear 4-op connections */
74 opl3->command(opl3, OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT,
75 opl3->connection_reg);
76 opl3->max_voices = MAX_OPL3_VOICES;
77 }
78 return 0;
79 }
80
81 void snd_opl3_synth_cleanup(opl3_t * opl3)
82 {
83 unsigned long flags;
84
85 /* Stop system timer */
86 spin_lock_irqsave(&opl3->sys_timer_lock, flags);
87 if (opl3->sys_timer_status) {
88 del_timer(&opl3->tlist);
89 opl3->sys_timer_status = 0;
90 }
91 spin_unlock_irqrestore(&opl3->sys_timer_lock, flags);
92
93 snd_opl3_reset(opl3);
94 down(&opl3->access_mutex);
95 opl3->used--;
96 up(&opl3->access_mutex);
97 }
98
99 static int snd_opl3_synth_use(void *private_data, snd_seq_port_subscribe_t * info)
100 {
101 opl3_t *opl3 = private_data;
102 int err;
103
104 if ((err = snd_opl3_synth_setup(opl3)) < 0)
105 return err;
106
107 if (use_internal_drums) {
108 /* Percussion mode */
109 opl3->voices[6].state = opl3->voices[7].state =
110 opl3->voices[8].state = SNDRV_OPL3_ST_NOT_AVAIL;
111 snd_opl3_load_drums(opl3);
112 opl3->drum_reg = OPL3_PERCUSSION_ENABLE;
113 opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, opl3->drum_reg);
114 } else {
115 opl3->drum_reg = 0x00;
116 }
117
118 if (info->sender.client != SNDRV_SEQ_CLIENT_SYSTEM) {
119 if ((err = snd_opl3_synth_use_inc(opl3)) < 0)
120 return err;
121 }
122 opl3->synth_mode = SNDRV_OPL3_MODE_SEQ;
123 return 0;
124 }
125
126 static int snd_opl3_synth_unuse(void *private_data, snd_seq_port_subscribe_t * info)
127 {
128 opl3_t *opl3 = private_data;
129
130 snd_opl3_synth_cleanup(opl3);
131
132 if (info->sender.client != SNDRV_SEQ_CLIENT_SYSTEM)
133 snd_opl3_synth_use_dec(opl3);
134 return 0;
135 }
136
137 /*
138 * MIDI emulation operators
139 */
140 snd_midi_op_t opl3_ops = {
141 .note_on = snd_opl3_note_on,
142 .note_off = snd_opl3_note_off,
143 .key_press = snd_opl3_key_press,
144 .note_terminate = snd_opl3_terminate_note,
145 .control = snd_opl3_control,
146 .nrpn = snd_opl3_nrpn,
147 .sysex = snd_opl3_sysex,
148 };
149
150 static int snd_opl3_synth_event_input(snd_seq_event_t * ev, int direct,
151 void *private_data, int atomic, int hop)
152 {
153 opl3_t *opl3 = private_data;
154
155 if (ev->type >= SNDRV_SEQ_EVENT_INSTR_BEGIN &&
156 ev->type <= SNDRV_SEQ_EVENT_INSTR_CHANGE) {
157 if (direct) {
158 snd_seq_instr_event(&opl3->fm_ops, opl3->ilist, ev,
159 opl3->seq_client, atomic, hop);
160 }
161 } else {
162 snd_midi_process_event(&opl3_ops, ev, opl3->chset);
163 }
164 return 0;
165 }
166
167 /* ------------------------------ */
168
169 static void snd_opl3_synth_free_port(void *private_data)
170 {
171 opl3_t *opl3 = private_data;
172
173 snd_midi_channel_free_set(opl3->chset);
174 }
175
176 static int snd_opl3_synth_create_port(opl3_t * opl3)
177 {
178 snd_seq_port_callback_t callbacks;
179 char name[32];
180 int voices, opl_ver;
181
182 voices = (opl3->hardware < OPL3_HW_OPL3) ?
183 MAX_OPL2_VOICES : MAX_OPL3_VOICES;
184 opl3->chset = snd_midi_channel_alloc_set(16);
185 if (opl3->chset == NULL)
186 return -ENOMEM;
187 opl3->chset->private_data = opl3;
188
189 memset(&callbacks, 0, sizeof(callbacks));
190 callbacks.owner = THIS_MODULE;
191 callbacks.use = snd_opl3_synth_use;
192 callbacks.unuse = snd_opl3_synth_unuse;
193 callbacks.event_input = snd_opl3_synth_event_input;
194 callbacks.private_free = snd_opl3_synth_free_port;
195 callbacks.private_data = opl3;
196
197 opl_ver = (opl3->hardware & OPL3_HW_MASK) >> 8;
198 sprintf(name, "OPL%i FM Port", opl_ver);
199
200 opl3->chset->client = opl3->seq_client;
201 opl3->chset->port = snd_seq_event_port_attach(opl3->seq_client, &callbacks,
202 SNDRV_SEQ_PORT_CAP_WRITE |
203 SNDRV_SEQ_PORT_CAP_SUBS_WRITE,
204 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
205 SNDRV_SEQ_PORT_TYPE_MIDI_GM |
206 SNDRV_SEQ_PORT_TYPE_SYNTH,
207 16, voices,
208 name);
209 if (opl3->chset->port < 0) {
210 snd_midi_channel_free_set(opl3->chset);
211 return opl3->chset->port;
212 }
213 return 0;
214 }
215
216 /* ------------------------------ */
217
218 static int snd_opl3_seq_new_device(snd_seq_device_t *dev)
219 {
220 opl3_t *opl3;
221 int client;
222 snd_seq_client_callback_t callbacks;
223 snd_seq_client_info_t cinfo;
224 int opl_ver;
225
226 opl3 = *(opl3_t **)SNDRV_SEQ_DEVICE_ARGPTR(dev);
227 if (opl3 == NULL)
228 return -EINVAL;
229
230 spin_lock_init(&opl3->voice_lock);
231
232 opl3->seq_client = -1;
233
234 /* allocate new client */
235 memset(&callbacks, 0, sizeof(callbacks));
236 callbacks.private_data = opl3;
237 callbacks.allow_output = callbacks.allow_input = 1;
238 client = opl3->seq_client =
239 snd_seq_create_kernel_client(opl3->card, opl3->seq_dev_num, &callbacks);
240 if (client < 0)
241 return client;
242
243 /* change name of client */
244 memset(&cinfo, 0, sizeof(cinfo));
245 cinfo.client = client;
246 cinfo.type = KERNEL_CLIENT;
247 opl_ver = (opl3->hardware & OPL3_HW_MASK) >> 8;
248 sprintf(cinfo.name, "OPL%i FM synth", opl_ver);
249 snd_seq_kernel_client_ctl(client, SNDRV_SEQ_IOCTL_SET_CLIENT_INFO, &cinfo);
250
251 snd_opl3_synth_create_port(opl3);
252
253 /* initialize instrument list */
254 opl3->ilist = snd_seq_instr_list_new();
255 if (opl3->ilist == NULL) {
256 snd_seq_delete_kernel_client(client);
257 opl3->seq_client = -1;
258 return -ENOMEM;
259 }
260 opl3->ilist->flags = SNDRV_SEQ_INSTR_FLG_DIRECT;
261 snd_seq_fm_init(&opl3->fm_ops, NULL);
262
263 /* setup system timer */
264 init_timer(&opl3->tlist);
265 opl3->tlist.function = snd_opl3_timer_func;
266 opl3->tlist.data = (unsigned long) opl3;
267 spin_lock_init(&opl3->sys_timer_lock);
268 opl3->sys_timer_status = 0;
269
270 #ifdef CONFIG_SND_SEQUENCER_OSS
271 snd_opl3_init_seq_oss(opl3, cinfo.name);
272 #endif
273 return 0;
274 }
275
276 static int snd_opl3_seq_delete_device(snd_seq_device_t *dev)
277 {
278 opl3_t *opl3;
279
280 opl3 = *(opl3_t **)SNDRV_SEQ_DEVICE_ARGPTR(dev);
281 if (opl3 == NULL)
282 return -EINVAL;
283
284 #ifdef CONFIG_SND_SEQUENCER_OSS
285 snd_opl3_free_seq_oss(opl3);
286 #endif
287 if (opl3->seq_client >= 0) {
288 snd_seq_delete_kernel_client(opl3->seq_client);
289 opl3->seq_client = -1;
290 }
291 if (opl3->ilist)
292 snd_seq_instr_list_free(&opl3->ilist);
293 return 0;
294 }
295
296 static int __init alsa_opl3_seq_init(void)
297 {
298 static snd_seq_dev_ops_t ops =
299 {
300 snd_opl3_seq_new_device,
301 snd_opl3_seq_delete_device
302 };
303
304 return snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_OPL3, &ops,
305 sizeof(opl3_t*));
306 }
307
308 static void __exit alsa_opl3_seq_exit(void)
309 {
310 snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_OPL3);
311 }
312
313 module_init(alsa_opl3_seq_init)
314 module_exit(alsa_opl3_seq_exit)
315
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