1
2
3
4
5
6
7
8
9
10
11#include "opl3_voice.h"
12#include <linux/init.h>
13#include <linux/moduleparam.h>
14#include <linux/module.h>
15#include <sound/initval.h>
16
17MODULE_AUTHOR("Uros Bizjak <uros@kss-loka.si>");
18MODULE_LICENSE("GPL");
19MODULE_DESCRIPTION("ALSA driver for OPL3 FM synth");
20
21bool use_internal_drums = 0;
22module_param(use_internal_drums, bool, 0444);
23MODULE_PARM_DESC(use_internal_drums, "Enable internal OPL2/3 drums.");
24
25int snd_opl3_synth_use_inc(struct snd_opl3 * opl3)
26{
27 if (!try_module_get(opl3->card->module))
28 return -EFAULT;
29 return 0;
30
31}
32
33void snd_opl3_synth_use_dec(struct snd_opl3 * opl3)
34{
35 module_put(opl3->card->module);
36}
37
38int snd_opl3_synth_setup(struct snd_opl3 * opl3)
39{
40 int idx;
41 struct snd_hwdep *hwdep = opl3->hwdep;
42
43 mutex_lock(&hwdep->open_mutex);
44 if (hwdep->used) {
45 mutex_unlock(&hwdep->open_mutex);
46 return -EBUSY;
47 }
48 hwdep->used++;
49 mutex_unlock(&hwdep->open_mutex);
50
51 snd_opl3_reset(opl3);
52
53 for (idx = 0; idx < MAX_OPL3_VOICES; idx++) {
54 opl3->voices[idx].state = SNDRV_OPL3_ST_OFF;
55 opl3->voices[idx].time = 0;
56 opl3->voices[idx].keyon_reg = 0x00;
57 }
58 opl3->use_time = 0;
59 opl3->connection_reg = 0x00;
60 if (opl3->hardware >= OPL3_HW_OPL3) {
61
62 opl3->command(opl3, OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT,
63 opl3->connection_reg);
64 opl3->max_voices = MAX_OPL3_VOICES;
65 }
66 return 0;
67}
68
69void snd_opl3_synth_cleanup(struct snd_opl3 * opl3)
70{
71 unsigned long flags;
72 struct snd_hwdep *hwdep;
73
74
75 spin_lock_irqsave(&opl3->sys_timer_lock, flags);
76 if (opl3->sys_timer_status) {
77 del_timer(&opl3->tlist);
78 opl3->sys_timer_status = 0;
79 }
80 spin_unlock_irqrestore(&opl3->sys_timer_lock, flags);
81
82 snd_opl3_reset(opl3);
83 hwdep = opl3->hwdep;
84 mutex_lock(&hwdep->open_mutex);
85 hwdep->used--;
86 mutex_unlock(&hwdep->open_mutex);
87 wake_up(&hwdep->open_wait);
88}
89
90static int snd_opl3_synth_use(void *private_data, struct snd_seq_port_subscribe * info)
91{
92 struct snd_opl3 *opl3 = private_data;
93 int err;
94
95 if ((err = snd_opl3_synth_setup(opl3)) < 0)
96 return err;
97
98 if (use_internal_drums) {
99
100 opl3->voices[6].state = opl3->voices[7].state =
101 opl3->voices[8].state = SNDRV_OPL3_ST_NOT_AVAIL;
102 snd_opl3_load_drums(opl3);
103 opl3->drum_reg = OPL3_PERCUSSION_ENABLE;
104 opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, opl3->drum_reg);
105 } else {
106 opl3->drum_reg = 0x00;
107 }
108
109 if (info->sender.client != SNDRV_SEQ_CLIENT_SYSTEM) {
110 if ((err = snd_opl3_synth_use_inc(opl3)) < 0)
111 return err;
112 }
113 opl3->synth_mode = SNDRV_OPL3_MODE_SEQ;
114 return 0;
115}
116
117static int snd_opl3_synth_unuse(void *private_data, struct snd_seq_port_subscribe * info)
118{
119 struct snd_opl3 *opl3 = private_data;
120
121 snd_opl3_synth_cleanup(opl3);
122
123 if (info->sender.client != SNDRV_SEQ_CLIENT_SYSTEM)
124 snd_opl3_synth_use_dec(opl3);
125 return 0;
126}
127
128
129
130
131struct snd_midi_op opl3_ops = {
132 .note_on = snd_opl3_note_on,
133 .note_off = snd_opl3_note_off,
134 .key_press = snd_opl3_key_press,
135 .note_terminate = snd_opl3_terminate_note,
136 .control = snd_opl3_control,
137 .nrpn = snd_opl3_nrpn,
138 .sysex = snd_opl3_sysex,
139};
140
141static int snd_opl3_synth_event_input(struct snd_seq_event * ev, int direct,
142 void *private_data, int atomic, int hop)
143{
144 struct snd_opl3 *opl3 = private_data;
145
146 snd_midi_process_event(&opl3_ops, ev, opl3->chset);
147 return 0;
148}
149
150
151
152static void snd_opl3_synth_free_port(void *private_data)
153{
154 struct snd_opl3 *opl3 = private_data;
155
156 snd_midi_channel_free_set(opl3->chset);
157}
158
159static int snd_opl3_synth_create_port(struct snd_opl3 * opl3)
160{
161 struct snd_seq_port_callback callbacks;
162 char name[32];
163 int voices, opl_ver;
164
165 voices = (opl3->hardware < OPL3_HW_OPL3) ?
166 MAX_OPL2_VOICES : MAX_OPL3_VOICES;
167 opl3->chset = snd_midi_channel_alloc_set(16);
168 if (opl3->chset == NULL)
169 return -ENOMEM;
170 opl3->chset->private_data = opl3;
171
172 memset(&callbacks, 0, sizeof(callbacks));
173 callbacks.owner = THIS_MODULE;
174 callbacks.use = snd_opl3_synth_use;
175 callbacks.unuse = snd_opl3_synth_unuse;
176 callbacks.event_input = snd_opl3_synth_event_input;
177 callbacks.private_free = snd_opl3_synth_free_port;
178 callbacks.private_data = opl3;
179
180 opl_ver = (opl3->hardware & OPL3_HW_MASK) >> 8;
181 sprintf(name, "OPL%i FM Port", opl_ver);
182
183 opl3->chset->client = opl3->seq_client;
184 opl3->chset->port = snd_seq_event_port_attach(opl3->seq_client, &callbacks,
185 SNDRV_SEQ_PORT_CAP_WRITE |
186 SNDRV_SEQ_PORT_CAP_SUBS_WRITE,
187 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
188 SNDRV_SEQ_PORT_TYPE_MIDI_GM |
189 SNDRV_SEQ_PORT_TYPE_DIRECT_SAMPLE |
190 SNDRV_SEQ_PORT_TYPE_HARDWARE |
191 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER,
192 16, voices,
193 name);
194 if (opl3->chset->port < 0) {
195 int port;
196 port = opl3->chset->port;
197 snd_midi_channel_free_set(opl3->chset);
198 return port;
199 }
200 return 0;
201}
202
203
204
205static int snd_opl3_seq_probe(struct device *_dev)
206{
207 struct snd_seq_device *dev = to_seq_dev(_dev);
208 struct snd_opl3 *opl3;
209 int client, err;
210 char name[32];
211 int opl_ver;
212
213 opl3 = *(struct snd_opl3 **)SNDRV_SEQ_DEVICE_ARGPTR(dev);
214 if (opl3 == NULL)
215 return -EINVAL;
216
217 spin_lock_init(&opl3->voice_lock);
218
219 opl3->seq_client = -1;
220
221
222 opl_ver = (opl3->hardware & OPL3_HW_MASK) >> 8;
223 sprintf(name, "OPL%i FM synth", opl_ver);
224 client = opl3->seq_client =
225 snd_seq_create_kernel_client(opl3->card, opl3->seq_dev_num,
226 name);
227 if (client < 0)
228 return client;
229
230 if ((err = snd_opl3_synth_create_port(opl3)) < 0) {
231 snd_seq_delete_kernel_client(client);
232 opl3->seq_client = -1;
233 return err;
234 }
235
236
237 timer_setup(&opl3->tlist, snd_opl3_timer_func, 0);
238 spin_lock_init(&opl3->sys_timer_lock);
239 opl3->sys_timer_status = 0;
240
241#if IS_ENABLED(CONFIG_SND_SEQUENCER_OSS)
242 snd_opl3_init_seq_oss(opl3, name);
243#endif
244 return 0;
245}
246
247static int snd_opl3_seq_remove(struct device *_dev)
248{
249 struct snd_seq_device *dev = to_seq_dev(_dev);
250 struct snd_opl3 *opl3;
251
252 opl3 = *(struct snd_opl3 **)SNDRV_SEQ_DEVICE_ARGPTR(dev);
253 if (opl3 == NULL)
254 return -EINVAL;
255
256#if IS_ENABLED(CONFIG_SND_SEQUENCER_OSS)
257 snd_opl3_free_seq_oss(opl3);
258#endif
259 if (opl3->seq_client >= 0) {
260 snd_seq_delete_kernel_client(opl3->seq_client);
261 opl3->seq_client = -1;
262 }
263 return 0;
264}
265
266static struct snd_seq_driver opl3_seq_driver = {
267 .driver = {
268 .name = KBUILD_MODNAME,
269 .probe = snd_opl3_seq_probe,
270 .remove = snd_opl3_seq_remove,
271 },
272 .id = SNDRV_SEQ_DEV_ID_OPL3,
273 .argsize = sizeof(struct snd_opl3 *),
274};
275
276module_snd_seq_driver(opl3_seq_driver);
277
