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Linux/sound/drivers/opl3/opl3_seq.c

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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                 snd_opl3_seq_new_device,
285                 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)
299 

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