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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 <linux/module.h> | |
29 | #include <sound/initval.h> | |
30 | ||
31 | MODULE_AUTHOR("Uros Bizjak <uros@kss-loka.si>"); | |
32 | MODULE_LICENSE("GPL"); | |
33 | MODULE_DESCRIPTION("ALSA driver for OPL3 FM synth"); | |
34 | ||
35 | bool use_internal_drums = 0; | |
36 | module_param(use_internal_drums, bool, 0444); | |
37 | MODULE_PARM_DESC(use_internal_drums, "Enable internal OPL2/3 drums."); | |
38 | ||
39 | int snd_opl3_synth_use_inc(struct snd_opl3 * opl3) | |
40 | { | |
41 | if (!try_module_get(opl3->card->module)) | |
42 | return -EFAULT; | |
43 | return 0; | |
44 | ||
45 | } | |
46 | ||
47 | void snd_opl3_synth_use_dec(struct snd_opl3 * opl3) | |
48 | { | |
49 | module_put(opl3->card->module); | |
50 | } | |
51 | ||
52 | int snd_opl3_synth_setup(struct snd_opl3 * opl3) | |
53 | { | |
54 | int idx; | |
55 | struct snd_hwdep *hwdep = opl3->hwdep; | |
56 | ||
57 | mutex_lock(&hwdep->open_mutex); | |
58 | if (hwdep->used) { | |
59 | mutex_unlock(&hwdep->open_mutex); | |
60 | return -EBUSY; | |
61 | } | |
62 | hwdep->used++; | |
63 | mutex_unlock(&hwdep->open_mutex); | |
64 | ||
65 | snd_opl3_reset(opl3); | |
66 | ||
67 | for (idx = 0; idx < MAX_OPL3_VOICES; idx++) { | |
68 | opl3->voices[idx].state = SNDRV_OPL3_ST_OFF; | |
69 | opl3->voices[idx].time = 0; | |
70 | opl3->voices[idx].keyon_reg = 0x00; | |
71 | } | |
72 | opl3->use_time = 0; | |
73 | opl3->connection_reg = 0x00; | |
74 | if (opl3->hardware >= OPL3_HW_OPL3) { | |
75 | /* Clear 4-op connections */ | |
76 | opl3->command(opl3, OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT, | |
77 | opl3->connection_reg); | |
78 | opl3->max_voices = MAX_OPL3_VOICES; | |
79 | } | |
80 | return 0; | |
81 | } | |
82 | ||
83 | void snd_opl3_synth_cleanup(struct snd_opl3 * opl3) | |
84 | { | |
85 | unsigned long flags; | |
86 | struct snd_hwdep *hwdep; | |
87 | ||
88 | /* Stop system timer */ | |
89 | spin_lock_irqsave(&opl3->sys_timer_lock, flags); | |
90 | if (opl3->sys_timer_status) { | |
91 | del_timer(&opl3->tlist); | |
92 | opl3->sys_timer_status = 0; | |
93 | } | |
94 | spin_unlock_irqrestore(&opl3->sys_timer_lock, flags); | |
95 | ||
96 | snd_opl3_reset(opl3); | |
97 | hwdep = opl3->hwdep; | |
98 | mutex_lock(&hwdep->open_mutex); | |
99 | hwdep->used--; | |
100 | mutex_unlock(&hwdep->open_mutex); | |
101 | wake_up(&hwdep->open_wait); | |
102 | } | |
103 | ||
104 | static int snd_opl3_synth_use(void *private_data, struct snd_seq_port_subscribe * info) | |
105 | { | |
106 | struct snd_opl3 *opl3 = private_data; | |
107 | int err; | |
108 | ||
109 | if ((err = snd_opl3_synth_setup(opl3)) < 0) | |
110 | return err; | |
111 | ||
112 | if (use_internal_drums) { | |
113 | /* Percussion mode */ | |
114 | opl3->voices[6].state = opl3->voices[7].state = | |
115 | opl3->voices[8].state = SNDRV_OPL3_ST_NOT_AVAIL; | |
116 | snd_opl3_load_drums(opl3); | |
117 | opl3->drum_reg = OPL3_PERCUSSION_ENABLE; | |
118 | opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, opl3->drum_reg); | |
119 | } else { | |
120 | opl3->drum_reg = 0x00; | |
121 | } | |
122 | ||
123 | if (info->sender.client != SNDRV_SEQ_CLIENT_SYSTEM) { | |
124 | if ((err = snd_opl3_synth_use_inc(opl3)) < 0) | |
125 | return err; | |
126 | } | |
127 | opl3->synth_mode = SNDRV_OPL3_MODE_SEQ; | |
128 | return 0; | |
129 | } | |
130 | ||
131 | static int snd_opl3_synth_unuse(void *private_data, struct snd_seq_port_subscribe * info) | |
132 | { | |
133 | struct snd_opl3 *opl3 = private_data; | |
134 | ||
135 | snd_opl3_synth_cleanup(opl3); | |
136 | ||
137 | if (info->sender.client != SNDRV_SEQ_CLIENT_SYSTEM) | |
138 | snd_opl3_synth_use_dec(opl3); | |
139 | return 0; | |
140 | } | |
141 | ||
142 | /* | |
143 | * MIDI emulation operators | |
144 | */ | |
145 | struct snd_midi_op opl3_ops = { | |
146 | .note_on = snd_opl3_note_on, | |
147 | .note_off = snd_opl3_note_off, | |
148 | .key_press = snd_opl3_key_press, | |
149 | .note_terminate = snd_opl3_terminate_note, | |
150 | .control = snd_opl3_control, | |
151 | .nrpn = snd_opl3_nrpn, | |
152 | .sysex = snd_opl3_sysex, | |
153 | }; | |
154 | ||
155 | static int snd_opl3_synth_event_input(struct snd_seq_event * ev, int direct, | |
156 | void *private_data, int atomic, int hop) | |
157 | { | |
158 | struct snd_opl3 *opl3 = private_data; | |
159 | ||
160 | snd_midi_process_event(&opl3_ops, ev, opl3->chset); | |
161 | return 0; | |
162 | } | |
163 | ||
164 | /* ------------------------------ */ | |
165 | ||
166 | static void snd_opl3_synth_free_port(void *private_data) | |
167 | { | |
168 | struct snd_opl3 *opl3 = private_data; | |
169 | ||
170 | snd_midi_channel_free_set(opl3->chset); | |
171 | } | |
172 | ||
173 | static int snd_opl3_synth_create_port(struct snd_opl3 * opl3) | |
174 | { | |
175 | struct snd_seq_port_callback callbacks; | |
176 | char name[32]; | |
177 | int voices, opl_ver; | |
178 | ||
179 | voices = (opl3->hardware < OPL3_HW_OPL3) ? | |
180 | MAX_OPL2_VOICES : MAX_OPL3_VOICES; | |
181 | opl3->chset = snd_midi_channel_alloc_set(16); | |
182 | if (opl3->chset == NULL) | |
183 | return -ENOMEM; | |
184 | opl3->chset->private_data = opl3; | |
185 | ||
186 | memset(&callbacks, 0, sizeof(callbacks)); | |
187 | callbacks.owner = THIS_MODULE; | |
188 | callbacks.use = snd_opl3_synth_use; | |
189 | callbacks.unuse = snd_opl3_synth_unuse; | |
190 | callbacks.event_input = snd_opl3_synth_event_input; | |
191 | callbacks.private_free = snd_opl3_synth_free_port; | |
192 | callbacks.private_data = opl3; | |
193 | ||
194 | opl_ver = (opl3->hardware & OPL3_HW_MASK) >> 8; | |
195 | sprintf(name, "OPL%i FM Port", opl_ver); | |
196 | ||
197 | opl3->chset->client = opl3->seq_client; | |
198 | opl3->chset->port = snd_seq_event_port_attach(opl3->seq_client, &callbacks, | |
199 | SNDRV_SEQ_PORT_CAP_WRITE | | |
200 | SNDRV_SEQ_PORT_CAP_SUBS_WRITE, | |
201 | SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | | |
202 | SNDRV_SEQ_PORT_TYPE_MIDI_GM | | |
203 | SNDRV_SEQ_PORT_TYPE_DIRECT_SAMPLE | | |
204 | SNDRV_SEQ_PORT_TYPE_HARDWARE | | |
205 | SNDRV_SEQ_PORT_TYPE_SYNTHESIZER, | |
206 | 16, voices, | |
207 | name); | |
208 | if (opl3->chset->port < 0) { | |
209 | int port; | |
210 | port = opl3->chset->port; | |
211 | snd_midi_channel_free_set(opl3->chset); | |
212 | return port; | |
213 | } | |
214 | return 0; | |
215 | } | |
216 | ||
217 | /* ------------------------------ */ | |
218 | ||
219 | static int snd_opl3_seq_new_device(struct snd_seq_device *dev) | |
220 | { | |
221 | struct snd_opl3 *opl3; | |
222 | int client, err; | |
223 | char name[32]; | |
224 | int opl_ver; | |
225 | ||
226 | opl3 = *(struct snd_opl3 **)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 | opl_ver = (opl3->hardware & OPL3_HW_MASK) >> 8; | |
236 | sprintf(name, "OPL%i FM synth", opl_ver); | |
237 | client = opl3->seq_client = | |
238 | snd_seq_create_kernel_client(opl3->card, opl3->seq_dev_num, | |
239 | name); | |
240 | if (client < 0) | |
241 | return client; | |
242 | ||
243 | if ((err = snd_opl3_synth_create_port(opl3)) < 0) { | |
244 | snd_seq_delete_kernel_client(client); | |
245 | opl3->seq_client = -1; | |
246 | return err; | |
247 | } | |
248 | ||
249 | /* setup system timer */ | |
250 | init_timer(&opl3->tlist); | |
251 | opl3->tlist.function = snd_opl3_timer_func; | |
252 | opl3->tlist.data = (unsigned long) opl3; | |
253 | spin_lock_init(&opl3->sys_timer_lock); | |
254 | opl3->sys_timer_status = 0; | |
255 | ||
256 | #ifdef CONFIG_SND_SEQUENCER_OSS | |
257 | snd_opl3_init_seq_oss(opl3, name); | |
258 | #endif | |
259 | return 0; | |
260 | } | |
261 | ||
262 | static int snd_opl3_seq_delete_device(struct snd_seq_device *dev) | |
263 | { | |
264 | struct snd_opl3 *opl3; | |
265 | ||
266 | opl3 = *(struct snd_opl3 **)SNDRV_SEQ_DEVICE_ARGPTR(dev); | |
267 | if (opl3 == NULL) | |
268 | return -EINVAL; | |
269 | ||
270 | #ifdef CONFIG_SND_SEQUENCER_OSS | |
271 | snd_opl3_free_seq_oss(opl3); | |
272 | #endif | |
273 | if (opl3->seq_client >= 0) { | |
274 | snd_seq_delete_kernel_client(opl3->seq_client); | |
275 | opl3->seq_client = -1; | |
276 | } | |
277 | return 0; | |
278 | } | |
279 | ||
280 | static int __init alsa_opl3_seq_init(void) | |
281 | { | |
282 | static struct snd_seq_dev_ops ops = | |
283 | { | |
284 | .init_device = snd_opl3_seq_new_device, | |
285 | .free_device = snd_opl3_seq_delete_device | |
286 | }; | |
287 | ||
288 | return snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_OPL3, &ops, | |
289 | sizeof(struct snd_opl3 *)); | |
290 | } | |
291 | ||
292 | static void __exit alsa_opl3_seq_exit(void) | |
293 | { | |
294 | snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_OPL3); | |
295 | } | |
296 | ||
297 | module_init(alsa_opl3_seq_init) | |
298 | module_exit(alsa_opl3_seq_exit) |