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1da177e4 LT |
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) |